Hi all,
After building batteries for a while, I finally start with the actual motor stuff. In the past I have been putting batteries into something that already had its own motor/controller/throttle and so on.
However, I want to start with using an electric motor for generator purposes only. Lets say a 10kW 48v BLDC motor.
Application is like a mild hybrid system, and I will most likely be using a mild hybrid generator, without the inverter.
I know it would be nice to reuse the whole system, usually CAN enabled systems, but I haven't seen to much succes on that, and the ones without the motor controller are easier to work with and cheap.
I think it would be nice to use a controller for that, because then I can just tell it how much to regen from software.
For example a Kelly controller can also have a 0-5v regen power signal.
I guess it would also be possible to work with some big diodes and a controllable DC-DC converter?
Using a motor controller would let me, for later use, have the option to power the motor i.s.o. generating only. But it is not so important right now.
However, I do have some questions.
1. What happens when the controller is idle or off, for long periods of time? Just like EVs aren't allowed to be towed typically, because the motor is always connected and is therefor always generating something which is unloaded. I don't think that is any different in the case of a 48v BLDC with something like a Kelly controller.
Are the controllers in some way built different, for example by being able to withstand those high unloaded voltages or by disconnecting some of the phases when not used?
2. A controller is for example suitable for 48v and 200A continuous for running the motor. Would the generator power be any less than that? I couldn't find any other data on this, but I can imagine that continuous or 1 minute power ratings are different for generation.
Thanks in advance
After building batteries for a while, I finally start with the actual motor stuff. In the past I have been putting batteries into something that already had its own motor/controller/throttle and so on.
However, I want to start with using an electric motor for generator purposes only. Lets say a 10kW 48v BLDC motor.
Application is like a mild hybrid system, and I will most likely be using a mild hybrid generator, without the inverter.
I know it would be nice to reuse the whole system, usually CAN enabled systems, but I haven't seen to much succes on that, and the ones without the motor controller are easier to work with and cheap.
I think it would be nice to use a controller for that, because then I can just tell it how much to regen from software.
For example a Kelly controller can also have a 0-5v regen power signal.
I guess it would also be possible to work with some big diodes and a controllable DC-DC converter?
Using a motor controller would let me, for later use, have the option to power the motor i.s.o. generating only. But it is not so important right now.
However, I do have some questions.
1. What happens when the controller is idle or off, for long periods of time? Just like EVs aren't allowed to be towed typically, because the motor is always connected and is therefor always generating something which is unloaded. I don't think that is any different in the case of a 48v BLDC with something like a Kelly controller.
Are the controllers in some way built different, for example by being able to withstand those high unloaded voltages or by disconnecting some of the phases when not used?
2. A controller is for example suitable for 48v and 200A continuous for running the motor. Would the generator power be any less than that? I couldn't find any other data on this, but I can imagine that continuous or 1 minute power ratings are different for generation.
Thanks in advance