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DRV8312 kit with TMS320F28069 controlCARD: I am limited in software to 3 Amps of Idref_A which makes my motor run at 2500RPM. Increasing the Idref_A will make my motor run faster. How do I increase Idref_A?

Other Parts Discussed in Thread: DRV8312, BOOSTXL-DRV8301, BOOSTXL-DRV8305EVM

 I am running the motor at over-modulation at 1.33 for trapezoidal PWM.  I have completed all the steps of motor parameters identification and field weakening. I noticed with increasing the Idref_A, my motor spins very fast and gets hot after a while. I am unable to push more than 3 Amps using the DRV8312 kit to my motor. I am certain my motor can handle upto 6.5 A and the board should be able to supply around 5-6 A.

I am ready to provide any information/files you need to get an idea about my environment.

  • Increasing IdRef does not increase torque. Did you mean IqRef?
    Increasing IdRef REDUCES torque and will heat th emotor.

    what is the setting of USER_MOTOR_MAX_CURRENT ?

    The DRV8312 only supports 3.5A continuous.

    You should probably use BOOSTXL-DRV8301 or BOOSTXL-DRV8305EVM
  • Oh now it makes sense why my motor was heating up after running for 5 mins when Idref_A was changed to a -2.5A.
    It is a 4 pole motor: https://goo.gl/h3tGKM
    I am using the Proj10a from the Instapin labs document and running it from CCSv6 by changing the values from the 'watch Expressions console window'
    #elif (USER_MOTOR == My_Motor)
    #define USER_MOTOR_TYPE MOTOR_Type_Pm
    #define USER_MOTOR_NUM_POLE_PAIRS (2)
    #define USER_MOTOR_Rr (NULL)
    #define USER_MOTOR_Rs (4.5748816)
    #define USER_MOTOR_Ls_d (0.003)//(0.6864949465)
    #define USER_MOTOR_Ls_q (0.003)//(0.6864949465)
    #define USER_MOTOR_RATED_FLUX (0.69214)
    #define USER_MOTOR_MAGNETIZING_CURRENT (NULL)
    #define USER_MOTOR_RES_EST_CURRENT (1.0)
    #define USER_MOTOR_IND_EST_CURRENT (-1.0)
    #define USER_MOTOR_MAX_CURRENT (10)
    #define USER_MOTOR_FLUX_EST_FREQ_Hz (20.0)
  • 1. it says it needs 36V for no load speed of 5200 RPM
    2. what does Number of poles: 4/8 mean? Is it 4 or 8 poles?
    3. you an use the 1.2Nm peak torque to calculate the peak current required

    again, the DRV8312 is under powered for this motor under load, but if you apply 36V and use max modulation you should get ~5200 RPM no load assuming poles is correct.
  • 
    

    1. I have a power supply hooked up which supplies 36V and can supply upto 6.5 A.

    2. I think its a 4 pole motor since the software RPM matches up with the Tachometer RPM when I select 4 poles.

    3. Changing gMotorVars.Iqref_A doesn't have any effect on the speed of the motor

    Let me know what other information you need to get an idea on how to make my motor run faster at 5200RPM5481.user.h

  • 1. ok. but the DRV8312 can only supply 3.5A continuous per phase.
    2. ok, it seems like it is 4 poles then
    3. It wouldn't unless you were using proj_lab05a. Which project are you running?

    from your user.h you have the following active

    #elif (USER_MOTOR == My_Motor)
    #define USER_MOTOR_TYPE MOTOR_Type_Pm
    #define USER_MOTOR_NUM_POLE_PAIRS (1)
    #define USER_MOTOR_Rr (NULL)
    #define USER_MOTOR_Rs (4.5748816)
    #define USER_MOTOR_Ls_d (0.003)//(0.6864949465)
    #define USER_MOTOR_Ls_q (0.003)//(0.6864949465)
    #define USER_MOTOR_RATED_FLUX (0.8035072)
    #define USER_MOTOR_MAGNETIZING_CURRENT (NULL)
    #define USER_MOTOR_RES_EST_CURRENT (1.0)
    #define USER_MOTOR_IND_EST_CURRENT (-1.0)
    #define USER_MOTOR_MAX_CURRENT (5.0)//(20.0)
    #define USER_MOTOR_FLUX_EST_FREQ_Hz (20.0)

    which doesn't match your motor specs

    fix this first
  • TI_user.txt
    #ifndef _USER_H_
    #define _USER_H_
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    //! \file   solutions/instaspin_foc/boards/drv8312kit_revD/f28x/f2806xF/src/user.h
    //! \brief  Contains the public interface for user initialization data for the CTRL, HAL, and EST modules 
    //!
    //! (C) Copyright 2012, Texas Instruments, Inc.
    
    
    // **************************************************************************
    // the includes
    
    // modules
    #include "sw/modules/types/src/types.h"
    #include "sw/modules/motor/src/32b/motor.h"
    #include "sw/modules/est/src/32b/est.h"
    #include "sw/modules/est/src/est_states.h"
    #include "sw/modules/est/src/est_Flux_states.h"
    #include "sw/modules/est/src/est_Ls_states.h"
    #include "sw/modules/est/src/est_Rs_states.h"
    #include "sw/modules/ctrl/src/32b/ctrl_obj.h"
    
    
    // platforms
    #include "sw/modules/fast/src/32b/userParams.h"
    
    //!
    //!
    //! \defgroup USER USER
    //!
    //@{
    
    
    #ifdef __cplusplus
    extern "C" {
    #endif
    
    // **************************************************************************
    // the defines
    
    
    //! \brief CURRENTS AND VOLTAGES
    // **************************************************************************
    //! \brief Defines the full scale frequency for IQ variable, Hz
    //! \brief All frequencies are converted into (pu) based on the ratio to this value
    //! \brief this value MUST be larger than the maximum speed that you are expecting from the motor 
    #define USER_IQ_FULL_SCALE_FREQ_Hz        (500.0)   // 800 Example with buffer for 8-pole 6 KRPM motor to be run to 10 KRPM with field weakening; Hz =(RPM * Poles) / 120
    
    //! \brief Defines full scale value for the IQ30 variable of Voltage inside the system
    //! \brief All voltages are converted into (pu) based on the ratio to this value
    //! \brief WARNING: this value MUST meet the following condition: USER_IQ_FULL_SCALE_VOLTAGE_V > 0.5 * USER_MOTOR_MAX_CURRENT * USER_MOTOR_Ls_d * USER_VOLTAGE_FILTER_POLE_rps, 
    //! \brief WARNING: otherwise the value can saturate and roll-over, causing an inaccurate value
    //! \brief WARNING: this value is OFTEN greater than the maximum measured ADC value, especially with high Bemf motors operating at higher than rated speeds
    //! \brief WARNING: if you know the value of your Bemf constant, and you know you are operating at a multiple speed due to field weakening, be sure to set this value higher than the expected Bemf voltage
    //! \brief It is recommended to start with a value ~3x greater than the USER_ADC_FULL_SCALE_VOLTAGE_V and increase to 4-5x if scenarios where a Bemf calculation may exceed these limits
    //! \brief This value is also used to calculate the minimum flux value: USER_IQ_FULL_SCALE_VOLTAGE_V/USER_EST_FREQ_Hz/0.7
    #define USER_IQ_FULL_SCALE_VOLTAGE_V      (51.0)   // 24.0 Example for drv8312_revd typical usage and the Anaheim motor
    
    //! \brief Defines the maximum voltage at the input to the AD converter
    //! \brief The value that will be represented by the maximum ADC input (3.3V) and conversion (0FFFh)
    //! \brief Hardware dependent, this should be based on the voltage sensing and scaling to the ADC input
    #define USER_ADC_FULL_SCALE_VOLTAGE_V       (66.32)      // 66.32 drv8312_revd voltage scaling
    
    //! \brief Defines the voltage scale factor for the system
    //! \brief Compile time calculation for scale factor (ratio) used throughout the system
    #define USER_VOLTAGE_SF               ((float_t)((USER_ADC_FULL_SCALE_VOLTAGE_V)/(USER_IQ_FULL_SCALE_VOLTAGE_V)))
    
    //! \brief Defines the full scale current for the IQ variables, A
    //! \brief All currents are converted into (pu) based on the ratio to this value
    //! \brief WARNING: this value MUST be larger than the maximum current readings that you are expecting from the motor or the reading will roll over to 0, creating a control issue 
    #define USER_IQ_FULL_SCALE_CURRENT_A          (10.0)   // 10.0 Example for drv8312_revd typical usage
    
    //! \brief Defines the maximum current at the AD converter
    //! \brief The value that will be represented by the maximum ADC input (3.3V) and conversion (0FFFh)
    //! \brief Hardware dependent, this should be based on the current sensing and scaling to the ADC input
    #define USER_ADC_FULL_SCALE_CURRENT_A        (17.30)     // 17.30 drv8312_revd current scaling
    
    //! \brief Defines the current scale factor for the system
    //! \brief Compile time calculation for scale factor (ratio) used throughout the system
    #define USER_CURRENT_SF               ((float_t)((USER_ADC_FULL_SCALE_CURRENT_A)/(USER_IQ_FULL_SCALE_CURRENT_A)))
    
    //! \brief Defines the number of current sensors used
    //! \brief Defined by the hardware capability present
    //! \brief May be (2) or (3)
    #define USER_NUM_CURRENT_SENSORS            (3)   // 3 Preferred setting for best performance across full speed range, allows for 100% duty cycle
    
    //! \brief Defines the number of voltage (phase) sensors
    //! \brief Must be (3)
    #define USER_NUM_VOLTAGE_SENSORS            (3) // 3 Required
    
    //! \brief ADC current offsets for A, B, and C phases
    //! \brief One-time hardware dependent, though the calibration can be done at run-time as well
    //! \brief After initial board calibration these values should be updated for your specific hardware so they are available after compile in the binary to be loaded to the controller
    #define   I_A_offset    (-0.8698533773)
    #define   I_B_offset    (-0.8696891665)
    #define   I_C_offset    (-0.8666335344)
    
    //! \brief ADC voltage offsets for A, B, and C phases
    //! \brief One-time hardware dependent, though the calibration can be done at run-time as well
    //! \brief After initial board calibration these values should be updated for your specific hardware so they are available after compile in the binary to be loaded to the controller
    #define   V_A_offset    (0.5100318193)
    #define   V_B_offset    (0.5051401258)
    #define   V_C_offset    (0.5047518015)
    
    
    //! \brief CLOCKS & TIMERS
    // **************************************************************************
    //! \brief Defines the system clock frequency, MHz
    #define USER_SYSTEM_FREQ_MHz             (90.0)
    
    //! \brief Defines the Pulse Width Modulation (PWM) frequency, kHz
    //! \brief PWM frequency can be set directly here up to 30 KHz safely (60 KHz MAX in some cases)
    //! \brief For higher PWM frequencies (60 KHz+ typical for low inductance, high current ripple motors) it is recommended to use the ePWM hardware
    //! \brief and adjustable ADC SOC to decimate the ADC conversion done interrupt to the control system, or to use the software Que example.
    //! \brief Otherwise you risk missing interrupts and disrupting the timing of the control state machine
    #define USER_PWM_FREQ_kHz                (30.0) //30.0 Example, 8.0 - 30.0 KHz typical; 45-80 KHz may be required for very low inductance, high speed motors
    
    //! \brief Defines the maximum Voltage vector (Vs) magnitude allowed.  This value sets the maximum magnitude for the output of the
    //! \brief Id and Iq PI current controllers.  The Id and Iq current controller outputs are Vd and Vq.
    //! \brief The relationship between Vs, Vd, and Vq is:  Vs = sqrt(Vd^2 + Vq^2).  In this FOC controller, the
    //! \brief Vd value is set equal to USER_MAX_VS_MAG*USER_VD_MAG_FACTOR.  Vq = sqrt(USER_MAX_VS_MAG^2 - Vd^2).
    //! \brief Set USER_MAX_VS_MAG = 0.5 for a pure sinewave with a peak at SQRT(3)/2 = 86.6% duty cycle.  No current reconstruction is needed for this scenario.
    //! \brief Set USER_MAX_VS_MAG = 1/SQRT(3) = 0.5774 for a pure sinewave with a peak at 100% duty cycle.  Current reconstruction will be needed for this scenario (Lab10a-x).
    //! \brief Set USER_MAX_VS_MAG = 2/3 = 0.6666 to create a trapezoidal voltage waveform.  Current reconstruction will be needed for this scenario (Lab10a-x).
    //! \brief For space vector over-modulation, see lab 10 for details on system requirements that will allow the SVM generator to go all the way to trapezoidal.
    #define USER_MAX_VS_MAG_PU        (0.5)    // Set to 0.5 if a current reconstruction technique is not used.  Look at the module svgen_current in lab10a-x for more info.
    
    //! \brief Defines the address of controller handle
    //!
    #define USER_CTRL_HANDLE_ADDRESS   (0x13C40)
    
    //! \brief Defines the address of estimator handle
    //!
    #define USER_EST_HANDLE_ADDRESS    (0x13840)
    
    //! \brief Defines the direct voltage (Vd) scale factor
    //!
    #define USER_VD_SF                 (0.95)
    
    //! \brief Defines the Pulse Width Modulation (PWM) period, usec
    //! \brief Compile time calculation
    #define USER_PWM_PERIOD_usec       (1000.0/USER_PWM_FREQ_kHz)
    
    //! \brief Defines the Interrupt Service Routine (ISR) frequency, Hz
    //!
    #define USER_ISR_FREQ_Hz           ((float_t)USER_PWM_FREQ_kHz * 1000.0 / (float_t)USER_NUM_PWM_TICKS_PER_ISR_TICK)
    
    //! \brief Defines the Interrupt Service Routine (ISR) period, usec
    //!
    #define USER_ISR_PERIOD_usec       (USER_PWM_PERIOD_usec * (float_t)USER_NUM_PWM_TICKS_PER_ISR_TICK)
    
    
    //! \brief DECIMATION
    // **************************************************************************
    //! \brief Defines the number of pwm clock ticks per isr clock tick
    //!        Note: Valid values are 1, 2 or 3 only
    #define USER_NUM_PWM_TICKS_PER_ISR_TICK        (3)
    
    //! \brief Defines the number of isr ticks (hardware) per controller clock tick (software)
    //! \brief Controller clock tick (CTRL) is the main clock used for all timing in the software
    //! \brief Typically the PWM Frequency triggers (can be decimated by the ePWM hardware for less overhead) an ADC SOC
    //! \brief ADC SOC triggers an ADC Conversion Done
    //! \brief ADC Conversion Done triggers ISR
    //! \brief This relates the hardware ISR rate to the software controller rate
    //! \brief Typcially want to consider some form of decimation (ePWM hardware, CURRENT or EST) over 16KHz ISR to insure interrupt completes and leaves time for background tasks
    #define USER_NUM_ISR_TICKS_PER_CTRL_TICK       (1)      // 2 Example, controller clock rate (CTRL) runs at PWM / 2; ex 30 KHz PWM, 15 KHz control
    
    //! \brief Defines the number of controller clock ticks per current controller clock tick
    //! \brief Relationship of controller clock rate to current controller (FOC) rate
    #define USER_NUM_CTRL_TICKS_PER_CURRENT_TICK   (1)      // 1 Typical, Forward FOC current controller (Iq/Id/IPARK/SVPWM) runs at same rate as CTRL. 
    
    //! \brief Defines the number of controller clock ticks per estimator clock tick
    //! \brief Relationship of controller clock rate to estimator (FAST) rate
    //! \brief Depends on needed dynamic performance, FAST provides very good results as low as 1 KHz while more dynamic or high speed applications may require up to 15 KHz
    #define USER_NUM_CTRL_TICKS_PER_EST_TICK       (1)      // 1 Typical, FAST estimator runs at same rate as CTRL;
    
    //! \brief Defines the number of controller clock ticks per speed controller clock tick
    //! \brief Relationship of controller clock rate to speed loop rate
    #define USER_NUM_CTRL_TICKS_PER_SPEED_TICK  (15)   // 15 Typical to match PWM, ex: 15KHz PWM, controller, and current loop, 1KHz speed loop
    
    //! \brief Defines the number of controller clock ticks per trajectory clock tick
    //! \brief Relationship of controller clock rate to trajectory loop rate
    //! \brief Typically the same as the speed rate
    #define USER_NUM_CTRL_TICKS_PER_TRAJ_TICK   (15)   // 15 Typical to match PWM, ex: 10KHz controller & current loop, 1KHz speed loop, 1 KHz Trajectory
    
    //! \brief Defines the controller frequency, Hz
    //! \brief Compile time calculation
    #define USER_CTRL_FREQ_Hz          (uint_least32_t)(USER_ISR_FREQ_Hz/USER_NUM_ISR_TICKS_PER_CTRL_TICK)
    
    //! \brief Defines the estimator frequency, Hz
    //! \brief Compile time calculation
    #define USER_EST_FREQ_Hz           (uint_least32_t)(USER_CTRL_FREQ_Hz/USER_NUM_CTRL_TICKS_PER_EST_TICK)
    
    //! \brief Defines the trajectory frequency, Hz
    //! \brief Compile time calculation
    #define USER_TRAJ_FREQ_Hz          (uint_least32_t)(USER_CTRL_FREQ_Hz/USER_NUM_CTRL_TICKS_PER_TRAJ_TICK)
    
    //! \brief Defines the controller execution period, usec
    //! \brief Compile time calculation
    #define USER_CTRL_PERIOD_usec      (USER_ISR_PERIOD_usec * USER_NUM_ISR_TICKS_PER_CTRL_TICK)
    
    //! \brief Defines the controller execution period, sec
    //! \brief Compile time calculation
    #define USER_CTRL_PERIOD_sec       ((float_t)USER_CTRL_PERIOD_usec/(float_t)1000000.0)
    
    
    //! \brief LIMITS
    // **************************************************************************
    //! \brief Defines the maximum negative current to be applied in Id reference
    //! \brief Used in field weakening only, this is a safety setting (e.g. to protect against demagnetization)
    //! \brief User must also be aware that overall current magnitude [sqrt(Id^2 + Iq^2)] should be kept below any machine design specifications
    #define USER_MAX_NEGATIVE_ID_REF_CURRENT_A     (-0.5 * USER_MOTOR_MAX_CURRENT)   // -0.5 * USER_MOTOR_MAX_CURRENT Example, adjust to meet safety needs of your motor
    
    //! \brief Defines the low speed limit for the flux integrator, pu 
    //! \brief This is the speed range (CW/CCW) at which the ForceAngle object is active, but only if Enabled
    //! \brief Outside of this speed - or if Disabled - the ForcAngle will NEVER be active and the angle is provided by FAST only
    #define USER_ZEROSPEEDLIMIT   (0.5 / USER_IQ_FULL_SCALE_FREQ_Hz)     // 0.002 pu, 1-5 Hz typical; Hz = USER_ZEROSPEEDLIMIT * USER_IQ_FULL_SCALE_FREQ_Hz
    
    //! \brief Defines the force angle frequency, Hz
    //! \brief Frequency of stator vector rotation used by the ForceAngle object
    //! \brief Can be positive or negative
    #define USER_FORCE_ANGLE_FREQ_Hz   (2.0 * USER_ZEROSPEEDLIMIT * USER_IQ_FULL_SCALE_FREQ_Hz)      // 1.0 Typical force angle start-up speed
    
    //! \brief Defines the maximum current slope for Id trajectory during PowerWarp
    //! \brief For Induction motors only, controls how fast Id input can change under PowerWarp control
    #define USER_MAX_CURRENT_SLOPE_POWERWARP   (0.3*USER_MOTOR_RES_EST_CURRENT/USER_IQ_FULL_SCALE_CURRENT_A/USER_TRAJ_FREQ_Hz)  // 0.3*RES_EST_CURRENT / IQ_FULL_SCALE_CURRENT / TRAJ_FREQ Typical to produce 1-sec rampup/down
    
    //! \brief Defines the starting maximum acceleration AND deceleration for the speed profiles, Hz/s
    //! \brief Updated in run-time through user functions
    //! \brief Inverter, motor, inertia, and load will limit actual acceleration capability
    #define USER_MAX_ACCEL_Hzps                 (100.0)      // 20.0 Default
    
    //! \brief Defines maximum acceleration for the estimation speed profiles, Hz/s
    //! \brief Only used during Motor ID (commission)
    #define USER_MAX_ACCEL_EST_Hzps           (5.0)         // 5.0 Default, don't change
    
    //! \brief Defines the maximum current slope for Id trajectory during estimation
    #define USER_MAX_CURRENT_SLOPE           (USER_MOTOR_RES_EST_CURRENT/USER_IQ_FULL_SCALE_CURRENT_A/USER_TRAJ_FREQ_Hz)      // USER_MOTOR_RES_EST_CURRENT/USER_IQ_FULL_SCALE_CURRENT_A/USER_TRAJ_FREQ_Hz Default, don't change
    
    //! \brief Defines the fraction of IdRated to use during rated flux estimation
    //!
    #define USER_IDRATED_FRACTION_FOR_RATED_FLUX (1.0)      // 1.0 Default, don't change
    
    //! \brief Defines the fraction of IdRated to use during inductance estimation
    //!
    #define USER_IDRATED_FRACTION_FOR_L_IDENT    (1.0)      // 1.0 Default, don't change
    
    //! \brief Defines the IdRated delta to use during estimation
    //!
    #define USER_IDRATED_DELTA                  (0.00002)
    
    //! \brief Defines the fraction of SpeedMax to use during inductance estimation
    //!
    #define USER_SPEEDMAX_FRACTION_FOR_L_IDENT  (1.0)      // 1.0 Default, don't change
    
    //! \brief Defines flux fraction to use during inductance identification
    //!
    #define USER_FLUX_FRACTION           (1.0)            // 1.0 Default, don't change
    
    //! \brief Defines the PowerWarp gain for computing Id reference
    //! \brief Induction motors only
    #define USER_POWERWARP_GAIN                   (1.0)         // 1.0 Default, don't change
    
    //! \brief Defines the R/L estimation frequency, Hz
    //! \brief User higher values for low inductance motors and lower values for higher inductance
    //! \brief motors.  The values can range from 100 to 300 Hz.
    #define USER_R_OVER_L_EST_FREQ_Hz (300)               // 300 Default
    
    
    //! \brief POLES
    // **************************************************************************
    //! \brief Defines the analog voltage filter pole location, Hz
    //! \brief Must match the hardware filter for Vph
    #define USER_VOLTAGE_FILTER_POLE_Hz  (714.14)   // 714.14, value for drv8312_revd hardware
    
    //! \brief Defines the analog voltage filter pole location, rad/s
    //! \brief Compile time calculation from Hz to rad/s
    #define USER_VOLTAGE_FILTER_POLE_rps  (2.0 * MATH_PI * USER_VOLTAGE_FILTER_POLE_Hz)
    
    //! \brief Defines the software pole location for the voltage and current offset estimation, rad/s
    //! \brief Should not be changed from default of (20.0)
    #define USER_OFFSET_POLE_rps            (20.0)   // 20.0 Default, do not change
    
    //! \brief Defines the software pole location for the flux estimation, rad/s
    //! \brief Should not be changed from default of (100.0)
    #define USER_FLUX_POLE_rps              (100.0)   // 100.0 Default, do not change
    
    //! \brief Defines the software pole location for the direction filter, rad/s
    #define USER_DIRECTION_POLE_rps             (6.0)   // 6.0 Default, do not change
    
    //! \brief Defines the software pole location for the speed control filter, rad/s
    #define USER_SPEED_POLE_rps           (100.0)   // 100.0 Default, do not change
    
    //! \brief Defines the software pole location for the DC bus filter, rad/s
    #define USER_DCBUS_POLE_rps           (100.0)   // 100.0 Default, do not change
    
    //! \brief Defines the convergence factor for the estimator
    //! \brief Do not change from default for FAST
    #define   USER_EST_KAPPAQ               (1.5)   // 1.5 Default, do not change
    
    // **************************************************************************
    // end the defines
    
    
    //! \brief USER MOTOR & ID SETTINGS
    // **************************************************************************
    
    //! \brief Define each motor with a unique name and ID number
    // BLDC & SMPM motors
    #define Estun_EMJ_04APB22           101
    #define Anaheim_BLY172S             102
    #define My_Motor                    104
    #define teknic_2310P                108
    
    // IPM motors
    // If user provides separate Ls-d, Ls-q
    // else treat as SPM with user or identified average Ls
    #define Belt_Drive_Washer_IPM       201
    
    // ACIM motors
    #define Marathon_5K33GN2A           301
    
    //! \brief Uncomment the motor which should be included at compile
    //! \brief These motor ID settings and motor parameters are then available to be used by the control system
    //! \brief Once your ideal settings and parameters are identified update the motor section here so it is available in the binary code
    //#define USER_MOTOR Estun_EMJ_04APB22
    //#define USER_MOTOR Anaheim_BLY172S  //this is chosen earlier Dey
    #define USER_MOTOR My_Motor
    //#define USER_MOTOR Belt_Drive_Washer_IPM
    //#define USER_MOTOR Marathon_5K33GN2A
    //#define USER_MOTOR teknic_2310P
    
    
    #if (USER_MOTOR == Estun_EMJ_04APB22)                  // Name must match the motor #define
    #define USER_MOTOR_TYPE                 MOTOR_Type_Pm  // Motor_Type_Pm (All Synchronous: BLDC, PMSM, SMPM, IPM) or Motor_Type_Induction (Asynchronous ACI)
    #define USER_MOTOR_NUM_POLE_PAIRS       (4)            // PAIRS, not total poles. Used to calculate user RPM from rotor Hz only
    #define USER_MOTOR_Rr                   (NULL)         // Induction motors only, else NULL
    #define USER_MOTOR_Rs                   (2.303403)     // Identified phase to neutral resistance in a Y equivalent circuit (Ohms, float)
    #define USER_MOTOR_Ls_d                 (0.008464367)  // For PM, Identified average stator inductance  (Henry, float)
    #define USER_MOTOR_Ls_q                 (0.008464367)  // For PM, Identified average stator inductance  (Henry, float)
    #define USER_MOTOR_RATED_FLUX           (0.38)         // Identified TOTAL flux linkage between the rotor and the stator (V/Hz)
    #define USER_MOTOR_MAGNETIZING_CURRENT  (NULL)         // Induction motors only, else NULL
    #define USER_MOTOR_RES_EST_CURRENT      (1.0)          // During Motor ID, maximum current (Amperes, float) used for Rs estimation, 10-20% rated current
    #define USER_MOTOR_IND_EST_CURRENT      (-1.0)         // During Motor ID, maximum current (negative Amperes, float) used for Ls estimation, use just enough to enable rotation
    #define USER_MOTOR_MAX_CURRENT          (3.82)         // CRITICAL: Used during ID and run-time, sets a limit on the maximum current command output of the provided Speed PI Controller to the Iq controller
    #define USER_MOTOR_FLUX_EST_FREQ_Hz     (20.0)         // During Motor ID, maximum commanded speed (Hz, float), ~10% rated
    
    #elif (USER_MOTOR == Anaheim_BLY172S)
    #define USER_MOTOR_TYPE                 MOTOR_Type_Pm
    #define USER_MOTOR_NUM_POLE_PAIRS       (2)
    #define USER_MOTOR_Rr                   (NULL)
    #define USER_MOTOR_Rs                   (0.4051206)
    #define USER_MOTOR_Ls_d                 (0.0006398709)
    #define USER_MOTOR_Ls_q                 (0.0006398709)
    #define USER_MOTOR_RATED_FLUX           (0.03416464)
    #define USER_MOTOR_MAGNETIZING_CURRENT  (NULL)
    #define USER_MOTOR_RES_EST_CURRENT      (1.0)
    #define USER_MOTOR_IND_EST_CURRENT      (-1.0)
    #define USER_MOTOR_MAX_CURRENT          (5.0)
    #define USER_MOTOR_FLUX_EST_FREQ_Hz     (20.0)
    
    #elif (USER_MOTOR == My_Motor)
    #define USER_MOTOR_TYPE                 MOTOR_Type_Pm
    #define USER_MOTOR_NUM_POLE_PAIRS       (2)
    #define USER_MOTOR_Rr                   (NULL)
    #define USER_MOTOR_Rs                   (4.5748816)
    #define USER_MOTOR_Ls_d                 (0.003)//(0.6864949465)
    #define USER_MOTOR_Ls_q                 (0.003)//(0.6864949465)
    #define USER_MOTOR_RATED_FLUX           (0.69214)
    #define USER_MOTOR_MAGNETIZING_CURRENT  (NULL)
    #define USER_MOTOR_RES_EST_CURRENT      (1.0)
    #define USER_MOTOR_IND_EST_CURRENT      (-1.0)
    #define USER_MOTOR_MAX_CURRENT          (7.5)
    #define USER_MOTOR_FLUX_EST_FREQ_Hz     (20.0)
    
    #elif (USER_MOTOR == Belt_Drive_Washer_IPM)
    #define USER_MOTOR_TYPE                 MOTOR_Type_Pm
    #define USER_MOTOR_NUM_POLE_PAIRS       (4)
    #define USER_MOTOR_Rr                   (NULL)
    #define USER_MOTOR_Rs                   (2.832002)
    #define USER_MOTOR_Ls_d                 (0.0115)
    #define USER_MOTOR_Ls_q                 (0.0135)
    #define USER_MOTOR_RATED_FLUX           (0.5022156)
    #define USER_MOTOR_MAGNETIZING_CURRENT  (NULL)
    #define USER_MOTOR_RES_EST_CURRENT      (1.0)
    #define USER_MOTOR_IND_EST_CURRENT      (-1.0)
    #define USER_MOTOR_MAX_CURRENT          (4.0)
    #define USER_MOTOR_FLUX_EST_FREQ_Hz     (20.0)
    
    #elif (USER_MOTOR == Marathon_5K33GN2A)                      // Name must match the motor #define
    #define USER_MOTOR_TYPE                 MOTOR_Type_Induction // Motor_Type_Pm (All Synchronous: BLDC, PMSM, SMPM, IPM) or Motor_Type_Induction (Asynchronous ACI)
    #define USER_MOTOR_NUM_POLE_PAIRS       (2)                  // PAIRS, not total poles. Used to calculate user RPM from rotor Hz only
    #define USER_MOTOR_Rr                   (5.508003)           // Identified phase to neutral in a Y equivalent circuit (Ohms, float)
    #define USER_MOTOR_Rs                   (10.71121)           // Identified phase to neutral in a Y equivalent circuit (Ohms, float)
    #define USER_MOTOR_Ls_d                 (0.05296588)         // For Induction, Identified average stator inductance  (Henry, float)
    #define USER_MOTOR_Ls_q                 (0.05296588)         // For Induction, Identified average stator inductance  (Henry, float)
    #define USER_MOTOR_RATED_FLUX           (0.8165*220.0/60.0)  // sqrt(2/3)* Rated V (line-line) / Rated Freq (Hz)
    #define USER_MOTOR_MAGNETIZING_CURRENT  (1.378)              // Identified magnetizing current for induction motors, else NULL
    #define USER_MOTOR_RES_EST_CURRENT      (0.5)                // During Motor ID, maximum current (Amperes, float) used for Rs estimation, 10-20% rated current
    #define USER_MOTOR_IND_EST_CURRENT      (NULL)               // not used for induction
    #define USER_MOTOR_MAX_CURRENT          (2.0)                // CRITICAL: Used during ID and run-time, sets a limit on the maximum current command output of the provided Speed PI Controller to the Iq controller
    #define USER_MOTOR_FLUX_EST_FREQ_Hz     (5.0)                // During Motor ID, maximum commanded speed (Hz, float). Should always use 5 Hz for Induction.
    
    
    #else
    #error No motor type specified
    #endif
    
    #ifndef USER_MOTOR
    #error Motor is not defined in user.h
    #endif
    
    #ifndef USER_MOTOR_TYPE
    #error The motor type is not defined in user.h
    #endif
    
    #ifndef USER_MOTOR_NUM_POLE_PAIRS
    #error Number of motor pole pairs is not defined in user.h
    #endif
    
    #ifndef USER_MOTOR_Rr
    #error The rotor resistance is not defined in user.h
    #endif
    
    #ifndef USER_MOTOR_Rs
    #error The stator resistance is not defined in user.h
    #endif
    
    #ifndef USER_MOTOR_Ls_d
    #error The direct stator inductance is not defined in user.h
    #endif
    
    #ifndef USER_MOTOR_Ls_q
    #error The quadrature stator inductance is not defined in user.h
    #endif
    
    #ifndef USER_MOTOR_RATED_FLUX
    #error The rated flux of motor is not defined in user.h
    #endif
    
    #ifndef USER_MOTOR_MAGNETIZING_CURRENT
    #error The magnetizing current is not defined in user.h
    #endif
    
    #ifndef USER_MOTOR_RES_EST_CURRENT
    #error The resistance estimation current is not defined in user.h
    #endif
    
    #ifndef USER_MOTOR_IND_EST_CURRENT
    #error The inductance estimation current is not defined in user.h
    #endif
    
    #ifndef USER_MOTOR_MAX_CURRENT
    #error The maximum current is not defined in user.h
    #endif
    
    #ifndef USER_MOTOR_FLUX_EST_FREQ_Hz
    #error The flux estimation frequency is not defined in user.h
    #endif
    
    
    // **************************************************************************
    // the functions
    
    
    //! \brief      Sets the user parameter values
    //! \param[in]  pUserParams  The pointer to the user param structure
    extern void USER_setParams(USER_Params *pUserParams);
    
    
    //! \brief      Checks for errors in the user parameter values
    //! \param[in]  pUserParams  The pointer to the user param structure
    extern void USER_checkForErrors(USER_Params *pUserParams);
    
    
    //! \brief      Gets the error code in the user parameters
    //! \param[in]  pUserParams  The pointer to the user param structure
    //! \return     The error code
    extern USER_ErrorCode_e USER_getErrorCode(USER_Params *pUserParams);
    
    
    //! \brief      Sets the error code in the user parameters
    //! \param[in]  pUserParams  The pointer to the user param structure
    //! \param[in]  errorCode    The error code
    extern void USER_setErrorCode(USER_Params *pUserParams,const USER_ErrorCode_e errorCode);
    
    
    //! \brief      Recalculates Inductances with the correct Q Format
    //! \param[in]  handle       The controller (CTRL) handle
    extern void USER_softwareUpdate1p6(CTRL_Handle handle);
    
    
    //! \brief      Updates Id and Iq PI gains
    //! \param[in]  handle       The controller (CTRL) handle
    extern void USER_calcPIgains(CTRL_Handle handle);
    
    
    //! \brief      Computes the scale factor needed to convert from torque created by Ld, Lq, Id and Iq, from per unit to Nm
    //! \return     The scale factor to convert torque from (Ld - Lq) * Id * Iq from per unit to Nm, in IQ24 format
    extern _iq USER_computeTorque_Ls_Id_Iq_pu_to_Nm_sf(void);
    
    
    //! \brief      Computes the scale factor needed to convert from torque created by flux and Iq, from per unit to Nm
    //! \return     The scale factor to convert torque from Flux * Iq from per unit to Nm, in IQ24 format
    extern _iq USER_computeTorque_Flux_Iq_pu_to_Nm_sf(void);
    
    
    //! \brief      Computes the scale factor needed to convert from per unit to Wb
    //! \return     The scale factor to convert from flux per unit to flux in Wb, in IQ24 format
    extern _iq USER_computeFlux_pu_to_Wb_sf(void);
    
    
    //! \brief      Computes the scale factor needed to convert from per unit to V/Hz
    //! \return     The scale factor to convert from flux per unit to flux in V/Hz, in IQ24 format
    extern _iq USER_computeFlux_pu_to_VpHz_sf(void);
    
    
    //! \brief      Computes Flux in Wb or V/Hz depending on the scale factor sent as parameter
    //! \param[in]  handle       The controller (CTRL) handle
    //! \param[in]  sf           The scale factor to convert flux from per unit to Wb or V/Hz
    //! \return     The flux in Wb or V/Hz depending on the scale factor sent as parameter, in IQ24 format
    extern _iq USER_computeFlux(CTRL_Handle handle, const _iq sf);
    
    
    //! \brief      Computes Torque in Nm
    //! \param[in]  handle          The controller (CTRL) handle
    //! \param[in]  torque_Flux_sf  The scale factor to convert torque from (Ld - Lq) * Id * Iq from per unit to Nm
    //! \param[in]  torque_Ls_sf    The scale factor to convert torque from Flux * Iq from per unit to Nm
    //! \return     The torque in Nm, in IQ24 format
    extern _iq USER_computeTorque_Nm(CTRL_Handle handle, const _iq torque_Flux_sf, const _iq torque_Ls_sf);
    
    
    //! \brief      Computes Torque in lbin
    //! \param[in]  handle          The controller (CTRL) handle
    //! \param[in]  torque_Flux_sf  The scale factor to convert torque from (Ld - Lq) * Id * Iq from per unit to lbin
    //! \param[in]  torque_Ls_sf    The scale factor to convert torque from Flux * Iq from per unit to lbin
    //! \return     The torque in lbin, in IQ24 format
    extern _iq USER_computeTorque_lbin(CTRL_Handle handle, const _iq torque_Flux_sf, const _iq torque_Ls_sf);
    
    
    #ifdef __cplusplus
    }
    #endif // extern "C"
    
    //@} // ingroup
    #endif // end of _USER_H_ definition
    
    

    Hi ,

    I have uploaded my working copy of user.h file. I am running Proj_lab5a and expecting to run the motor at high speed when I change the IqRef_A but the motor spins at a lower speed than the set target RPM.

    I have played around with different values for poles but it has no effect on the speed of the motor. It only affects the software reading of the RPM.

    The inductance, resistance  and flux values are retrieved from previous lab demos so I expect them to be ideal for this Motor

    Can you specify the function of these variables or where I can find them in the docs:

    #define USER_MOTOR_RES_EST_CURRENT      (2.0)
    #define USER_MOTOR_IND_EST_CURRENT      (-2.0)

    Also, I cant find information in the labs about the filter pole frequency of the motor and wondering if it has a part to play.

     

    Thanks

  • the screen shot shows the motor running at 786 RPM when you apply an IqRef_A of 2.0

    that seems "reasonable" in general.

    With 4 poles 786 RPM = 26 Hz.
    Your motor has a very large flux of 0.684 V/Hz.
    @ 26 Hz you are producing 17.9V of Bemf, almost half of your 36.6V bus

    Increase the IqRef_A and the motor should spin faster. I would think you should get to about 1600 RPM before the Bemf is more than your bus.

    It seems your motor is built for higher voltage, yes?
  • Yes, I think the motor is suited for higher voltages so I usually run it at 50 V. I had tinkered around with changing the Iqref_A values in the past but the odd problem is, motor runs at a constant RPM for any non-zero IqRef_A value.

    Setting IqRef_A = 0 stops the motor off but when IqRef_A != 0 , motor runs at 799RPM. It does not follow a linear increase as you suggested. I have included the screenshot of IqRef_A = 0.5 A below. Notice the RPM is the same as when the case is 2.0A. I went through the air gap flux estimation again and it resulted in the same value as 0.68 V/Hz

  • "It does not follow a linear increase as you suggested."
    I never suggested this. In torque mode, with no load, once you have enough IqRef to overcome the frictional start-up load the motor typically will run close to it's max speed for the Vbus and modulation being applied

    My comment was that based on the Bemf of the motor I would have expected it to run up to 2x faster, but that's not a rule.

    in this case your motor needs more voltage to go faster