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Three Phase BLDC Motor Drives

Ron Stewart
Intellectual 320 points
Other Parts Discussed in Thread: DRV8320, DRV8301, DRV8323, TMDSHVMTRINSPIN

The part number/description I referenced above is possibly just what I need except for size and voltage. I have several of the same Three Phase Brushless DC Motors that I want to be able to run at various rpm in my motor test fixture. I have not had any luck in finding a drive to run these motors from any of the major drive manufacturers. The motor description that I am referring to is;  Motor Type - Synchronous motor having 8 poles in a permanent magnet field and three phases in the wound stator connected in a Wye with Three (3) Leads for operating as a Brushless DC Motor with Resolver Commutation. The Motor Winding Constants are; Design Voltage (Rated) - 233 VDC, Stall Current @ Design Voltage (Ip) - 685 Amps, Stall Power @ Design Voltage (Pp) - 159.2 K Watts; Peak Torque (25 Degrees C) (Tp) - 3440 Lb-In, Resistance Line-To-Line 9Rm) - 0.395 Ohms, Torque per unit Line Current (Kt) —- 5.02 Lb.- In /A, Voltage Constant - 67.6 V/KRPM, Inductance (Lm) - 2.25 mH
Rotation - CW as viewed from the shaft end with the following stepped excitation sequence - Step 1, Phase A + Phase B -, Step 2, Phase A + Phase C -, Step 3, Phase B + Phase C -,  Step 4, Phase B + Phase A -, Step 5, Phase C + Phase A -, Step 6, Phase C + Phase B -. For CCW Rotation reverse polarities.
This motor has an Amphenol circular connector with only four (4) pin connections and they are; Pins A, B & C correspond with Phases A, B & C DC power inputs from the Drive and Pin D is Case Ground.
IMPORTANT NOTE: I AM ONLY INTENDING TO RUN THIS MOTOR ON MY TEST FIXTURE AT “NO LOAD”, WHICH ONLY REQUIRES A MAXIMUM OF APPROXIMATELY 5 AMPS. IT WOULD BE NICE TO HAVE A DRIVE CAPABLE OF A MAXIMUM OUTPUT OF 10 AMPS. I DO WANT TO BE ABLE TO OPERATE THE MOTOR WITH INPUT VOLTAGE OF 233 VDC IN ORDER TO OBTAIN THE RATED RPM.
I would very much appreciate input on how to best build/have built/purchase a drive that would meet the requirements set forth herein.
Thanks,
Ron Stewart

  • 0
    TI__Genius 14485 points
    Hi Ron,

    It sounds like you are looking for some kind of high-power industrial drive design. The following link will take you to some of our block diagrams of industrial systems which can help you choose devices from our portfolio if you find a good match: www.ti.com/.../overview.html

    As for an integrated motor driver IC, the closest devices I can recommend for your requirements from our portfolio are the DRV8323, DRV8320, and DRV8301/2/3. However, these will only support 60-V applications. We do not have any devices to support 233 VDC. You will likely need a discrete soluion for your particular application.
  • 0 in reply to James Lockridge19
    TI__Genius 14485 points
    Ron,

    A coworker pointed me to the evaluation kit at the link below. It should be close to your application. You should be able to download the design files for it from the webpage.

    www.ti.com/.../TMDSHVMTRPFCKIT
  • 0 in reply to James Lockridge19
    Intellectual 320 points
    First, thank you very much for your help and direction. I ran across another motor driver designated as; TMDSHVMTRINSPIN. The page indicates it is a "High Voltage and Currents" type of drive, but I don't know if it is referring only to the input voltage? Even if it is powered with an input of Single Phase 240V, I don't know if the input has any impact on the DC output voltage or amperage. I have looked for the Output Voltage & Amperage but I've either overlooked it or didn't look at the right document. Could you please answer a few questions on this motor drive? 1. Is the output voltage Three Phase DC? 2. What is the Output Voltage and amperage range? 3. Based upon my three phase BLDC motor specs I described in my initial Post; would this TI Motor Driver have any problems running it under a NO LOAD, 5 amp maximum current draw, to the extent of the TI Driver Design Output Voltage? 4. Can the Output Voltage be easily increased and decreased (such as a integral Pot) to change my motor's rpm? 5. If I purchased the TMDSHVMTRINSPIN at $699 from TI, do I need to purchase additional components from TI in order to be able to run my motor at No Load on my test fixture; of course, within the design voltage output range of the TMDSHVMTRINSPIN?
    Thank you,
    Ron
  • 0 in reply to James Lockridge19
    Intellectual 320 points
    Hi James,
    Thank you, I will take a look at it this evening after I leave my shop. I certainly appreciate your help with my project. I just sent you a follow up to your initial reply. I had several questions and I hope you don't get irritated with my questions. I just want to get some things straight in my mind so I don't purchase the wrong driver.
    Thanks,
    Ron
  • 0 in reply to James Lockridge19
    Intellectual 320 points

    James,

    I did look at the high voltage driver last evening. I had not looked at it before and noticed it seems kind of similar to the drive I referenced in my post to you yesterday afternoon. They are priced the same and I wanted to know which drive model/series you think would best fit my needs. I would like to purchase what you believe I will need from the TI Site as soon as possible. If you can, I really need your feedback on the questions I asked in my earlier of 2 post yesterday, as it will help very much to go with one or the two drives.

    Thank you,

    Ron   

  • 0 in reply to James Lockridge19
    Intellectual 320 points

    James,

    As you know, I am new to the E2E Community. I keep forgetting to ask you, what is meant by the term "Kit" and "Developer's Kit" in the title of the two motor drives I am focusing on at this point in time?

    Thank you,

    Ron Stewart

  • 0 in reply to Ron Stewart
    TI__Genius 14485 points
    Ron,

    The TMDSHVMTRINSPIN and TMDSHVMTRPFCKIT are reference designs. They are meant to show customers how to build these motor drive platforms with TI parts. Customers can purchase these platforms to evaluate the performance of our recommended solution and to experiment with using it on their own systems. We usually provide the design files and software for customers to copy and modify for their own systems. However, the kits themselves are not intended to be used for a final product design.

    As for your other questions, I will notify our C2000 team about this thread to provide further support. The two kits you mention showcase the C2000 product. I only support the DRV8xxx and DRV3xxx devices, so I'm not familiar with these kits.
  • 0 in reply to James Lockridge19
    Intellectual 320 points
    James,
    I appreciate all of your help.
    Thank you,
    Ron Stewart