Other Parts Discussed in Thread: BOOSTXL-3PHGANINV
Tool/software:
I am using the F280039C microcontroller with the BOOSTXL-3PHGANINV driver and opened Universal_motorcontrol_lab_f28003x.
The motor runs correctly with the sensorless FAST.
Looking at the schematic, the INA240A1 produces on one of the three phases a Vout=Ia*Rsense*gain-Vref which sends to pin 27 "Analog_In/I2S_WS." So I connected that pin to the oscilloscope and displayed the phase waveform by inverse mathematical formula: Ia=(Vout-Vref) / (gain*Vdiff) .. so I displayed Ia:
Can you tell me due to what parameters the current is not sinusoidal?
//This is my motor: #define USER_MOTOR1_TYPE MOTOR_TYPE_PM #define USER_MOTOR1_NUM_POLE_PAIRS (7) #define USER_MOTOR1_Rr_Ohm (NULL) #define USER_MOTOR1_Rs_Ohm (0.0228128177) #define USER_MOTOR1_Ls_d_H (0.00004598) #define USER_MOTOR1_Ls_q_H (0.00004598) #define USER_MOTOR1_RATED_FLUX_VpHz (0.0452475) #define USER_MOTOR1_MAGNETIZING_CURRENT_A (NULL) #define USER_MOTOR1_RES_EST_CURRENT_A (10.0f) #define USER_MOTOR1_IND_EST_CURRENT_A (-10.0f) #define USER_MOTOR1_MAX_CURRENT_A (95.0f) #define USER_MOTOR1_FLUX_EXC_FREQ_Hz (20.0f)
PWM_FREQ
