RX7 EV First High Voltage Test

First high voltage test run of the driver portion of my home-built motor controller. This test was done using one of the two parallel IGBT's without the PWM circuit. Pack voltage was 78vdc, final pack voltage will be 120vdc.

(UPDATE: This project has been sold.)

Category:

Autos & Vehicles

Tags:

• rx7
• ev
• electric
• car
• igbt
• controller
• test

[mopar43v3r]

pretty sweet, but why an rx7? i dont understand all these ev vehicles use something which doesnt deserve to be destroyed, use a kia or something.

[AudiMouse]

The RX7 already had a bad engine in it. I actually rescued it from the wrecker. It had already been partially parted out. Had to get a bumper, brakes, and several interior pieces for it. It's also a very good platform for an EV conversion. Front engine, RWD, light, aerodynamic, etc.

[nephilymbass]

I want to build an ev truck and put a couple 2 foot by 4 foot solar panels in the bed to charge the batteries. Has anyone done this yet? What would I need to regulate the electricity from the solar panels so I'm not putting to much power into the car?

[AudiMouse]

Solar panels put out such a small amount of power. In order to charge a battery pack, you need a higher voltage than the batteries in order to cause charging current to flow. If you have a 120v pack made up of 10 12v batteries though, you can rewire the batteries in parallel to get 12v. As long as you have more than 12v coming from your solar cells, contactors to do that. It's also dangerous because the sequence of opening and closing the contactors is important to prevent shorting the pack.

[djmomocrx]

great ! and still rotary !!! ( in other way ) all the electric engines have a rotor inside !!!

[paytontech]

@dcr1tch actually, there are losses in all parts of the circuit, including the battery, motor and controller. In fact, the resistance of the battery limits the minimum voltage you can use for a given target output.

[TakayaFreeman]

It's not really being destroyed. It's simply being remade to something more powerful. From the looks of it, it looks like the RX-7 can now eat some muscle cars alive.

[dcr1tch]

3000V battery is going to be a bit on the large side to deliver 5 to 10 Amps.

Doesn't really matter what voltage / current you pick - apart from power loss in the cable due to heating - which is perhaps one good reason for using higher voltage. The charge on the battery will last no longer.

[vid009a]

Excellent, what type of motor is that ?

[mopar43v3r]

good reason