Hi,
I'm considering the following parts for a light weight kit vehicle and would welcome comments about any problems or limitations of the combination chosen. Wasn't sure if this Q fitted into any other forum area and it's not an actual project yet so didn't ask there.
I've only worked with DC brushed traction motors on kit cars but am out of touch with matching up three phase systems.
Toyota synergy drive inverter from a Prius / Yaris or similar + Johannes brain.
Toyota MRG transaxle from the Lexus RS400 or similar.
300-350V battery pack battery pack maybe Nissan Leaf based.
My main concern is that the motor is rated 650V as is the maximum system voltage of the inverter via a Boost stage from battery pack voltage of around half that voltage. I guess then that the hybrid inverter can be used to drive the motor but the use and performance of the Boost circuit is still confusing me a bit. The MRG motor is rated at 50kw however I can not work out if the boost circuit or actual batteries are limiting the boosted power to 21kw so how successful will such a combination be?
Any sort of comments about real-world performance of this combination would be appreciated.
If this has been covered in another thread please point me there.
Proposed combination of parts for a drive system.
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arber333
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Re: Proposed combination of parts for a drive system.
I imagine it would be better to go towards 400Vdc and use field weakening to spin the motor faster. You would need the oil pump there...
What kind of winding is there on the motor?
You can use one chineese Ebike controller and run the motor with 60Vdc. Measure the speed and then extrapolate it to your voltage. You get motor base speed. I have done the same for Leaf motor and for AC compressor.
Then calculate how is that viable to you. If there is smaller margin to your wanted speed you can pul larger wheels on your car
.
What kind of winding is there on the motor?
You can use one chineese Ebike controller and run the motor with 60Vdc. Measure the speed and then extrapolate it to your voltage. You get motor base speed. I have done the same for Leaf motor and for AC compressor.
Then calculate how is that viable to you. If there is smaller margin to your wanted speed you can pul larger wheels on your car
.Re: Proposed combination of parts for a drive system.
The best I can find out is 8 pole Star wound.
Simply writing that down makes me wonder if it can be altered to Delta winding but I don't understand motors to know if that is a working solution using the same controllers.
Is field weakening an efficient way of more RPM without a loss in power?