3-phase DC Motor Controller

Duane Smith

Other Parts Discussed in Thread: TIDM-1003, DRV8353R, DRV8353RH-EVM, MOTORWARE

We are looking to design a 3-phase DC motor controller for an electric scooter.

The motor is a brushless DC motor, with three hall sensors, 72vdc, 40A, 3-phase motor.

The target processor is the TMS320F280x series of Piccolo™ Microcontrollers using the InstaSPIN-FOC firmware.

Our inputs are one analog 0-5vdc from the throttle, the three hall sensors, two digital inputs from the brakes, battery monitor which includes battery capacity and communications to a user interface.

Can you identify a processor that will work with our 72vdc, 40A requirement the highest voltage part I can find is 42vdc using 60v MOSFETs or a way we can signal condition to use one of the existing processors?

We also want regenerative braking, does the TMS320F28xx series have the firmware to perform this function?

Any information would be appreciated, possibly there is a reference design we can start with and modify for our application.

Thank

over 4 years ago

0 Hector Hernandez Luque over 4 years ago

TI__Expert 8980 points

Hi Duane,

I have moved this e2e's responsible org to the BLDC team. Expect a reply in the next business day.

0 Adam Sidelsky over 4 years ago

TI__Guru 61380 points

Duane,

Are you asking about the processor or the gate driver?

This forum is for the gate driver.

Regards,

-Adam

0 Duane Smith over 4 years ago in reply to Adam Sidelsky

Intellectual 400 points

Hi Adam,

My question is for the gate driver. We are using the TIDM-1003 kit as a starting point but this kit is a low voltage high current design, 54vdc 50A.

What we need is 84vdc (max battery when charged, would like to add some margin), 40A min.

So my question is what gate drivers will work in the TIDM-1003 design that will give us the 84vdc 40A we are looking for.

Thanks

0 Adam Sidelsky over 4 years ago in reply to Duane Smith

TI__Guru 61380 points

Duane,

I would suggest you order a DRV8353R-EVM kit. This kid uses the same TMS320F28xx processor and the DRV8353R 100V gate driver chip which features smart gate drive, overcurrrent/temperature protection, as well as many other features. The EVM cannot support the 40A needed but the device is the correct one for your needs.

Regards,

-Adam

0 Duane Smith over 4 years ago in reply to Adam Sidelsky

Intellectual 400 points

Ok are there any modifications I can do to get to the 40A?

I cannot find any schematics or layout documentation on this kit, is there a link you can provide so we can understand the functioning for the DRV8353RH-EVM kit?

Thanks

0 Adam Sidelsky over 4 years ago in reply to Duane Smith

TI__Guru 61380 points

Duane,

These boards are designed to help you evaluate your application, they are not meant to be used as final boards.

Please check this page for the Design files and User's Guide: http://www.ti.com/tool/DRV8353RH-EVM

Regards,

-Adam

0 Duane Smith over 4 years ago in reply to Adam Sidelsky

Intellectual 400 points

We are not looking for a final design just the drivers that will allow us to provide 40A at 90vdc to the existing motor we have.

It seems like TI does not have a driver that meets our needs or you would have provided that by now.

If I cannot find the driver that will do 40A then none of this is worth it, which includes the kit.

Regards

0 Adam Sidelsky over 4 years ago in reply to Duane Smith

TI__Guru 61380 points

Duane,

Our drivers only switch the external FETs, as long as your FET can handle 40A, any driver that accepts the DC bus voltage being used.

The DRV8353R-EVM can accept up to 100V DC bus so this should work for you. The EVM itself should handle 40A but I cannot say for sure. When you design your own board using a device like the DRV8353R, then you can build it to support 40A for sure.

Regards,

-Adam

0 Duane Smith over 4 years ago in reply to Adam Sidelsky

Intellectual 400 points

Adam,

The MOSFETs in this design are 100v, 100A which is what I was looking for, and the DRV8353RSRGZR can handle 95v so this works, thanks

0 Adam Sidelsky over 4 years ago in reply to Duane Smith

TI__Guru 61380 points

Duane,

The power input connectors and motor output connectors are rated for 32A max so please be careful when using higher current with the existing board.

Regards,

-Adam

0 Duane Smith over 4 years ago in reply to Adam Sidelsky

Intellectual 400 points

Adam,

We have purchased a couple of kits and want to start with a motor that is recommended by TI for these kits, could you provide a part number for a motor that was used to develop this kit or one that is known to work with it?

Thanks

0 Duane Smith over 4 years ago in reply to Adam Sidelsky

Intellectual 400 points

Adam,

We purchased a couple of the DRV8353RH-EVM kits and would like to start by using a motor that directly works with the kit, can you provide a part number for a motor that was either used for development or one that is known to work with the kit?

Thanks

0 Adam Sidelsky over 4 years ago in reply to Duane Smith

TI__Guru 61380 points

Duane,

Any brushless BLDC can work with this kit. The motor itself depends on your application. Please select a motor yourself.

Regards,

-Adam

0 Duane Smith over 4 years ago in reply to Adam Sidelsky

Intellectual 400 points

Thanks Adam.

We have the motor running on the FOC motor control GUI and would like to change the voltage to the motor, can you provide the path to the local user.h file so we can modify the full scale voltage?

Thanks

0 Adam Sidelsky over 4 years ago in reply to Duane Smith

TI__Guru 61380 points

Duane,

Your image didn't come through, do you have access to the User.C file in code composer studio?

Regards,

-Adam

0 Duane Smith over 4 years ago in reply to Adam Sidelsky

Intellectual 400 points

Hopefully you got it this time. What I really want to do is modify the "User Configured Parameters" so when I run the motor identification testing we are providing the motor with the appropriate voltage, right now we are starving the motor at 24v.

I am not sure the user.h is the correct place to get the GUI to initially change the User Configured Parameters because the user guide says that if you update form the user.h you cannot run the motor identification testing.. From the instructions to modify the user.h it states that you can use composer but you have to know the path to the file and none of the docs give the path to the file.

Looked for a path on my PC does this look correct?

C:\ti\motorware\motorware_1_01_00_18\sw\solutions\instaspin_foc\boards\boostxldrv8305_revA\f28x\f2802xF\src

Thanks

0 Adam Sidelsky over 4 years ago in reply to Duane Smith

TI__Guru 61380 points

Duane,

If you want to modify the CCS code, I would use CCS completely instead of the GUI. There is a user's guide on how to do this and you can still spin the motor and do the ID process inside of CCS.

http://www.ti.com/lit/ug/slvubh8b/slvubh8b.pdf

Regards,

-Adam

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3-phase DC Motor Controller