2 ms·

The Netgain motors are wildly outdated. 100-140v in a world where 400v is almost standard, and 800v is increasingly common. Means you need very heavy duty wiri

The Netgain motors are wildly outdated. 100-140v in a world where 400v is almost standard, and 800v is increasingly common. Means you need very heavy duty wiring/controllers, high current rated batteries, can't use OEM power steering / AC compressors, can't use OEM battery packs, can't use DCFC infrastructure....

ChuckNorris89 5y ago
>can't use OEM power steering / AC compressors And why not? Power steering systems don't run on the HV system but on the LV system as every electric car has a DC/DC converter that bridges the HV and LV domains. So regardless if your cars is using 800V or 100V powertrain system, all the auxiliary equipment will still be on the 12V network.
elihu 5y ago
I basically agree with that, though I'd say that lower voltage motors are sometimes useful in conversions, since they usually have a smaller battery pack than what would be in an OEM vehicle (due to weight, cost, and having limited space to put the battery). Lower voltage doesn't really stop you from salvaging all those other parts from an OEM vehicle. I think it's usually just the motor controller and DC-DC converter that run at the full pack voltage. DC fast charging is a problem if the charger doesn't support the lower voltage. I have wondered whether the Hyper9 can actually run at a higher voltage without damage. I suppose the limiting factors are the insulation on the motor windings and the ability to dissipate heat. (The motor demagnetizes if it gets too hot, which is why the motor has a temperature sensor so the controller can back off before that happens.) The Hyper9 comes with a motor controller that's limited to 180 volts (that's for the 144v nominal version). I don't know if anyone's tried to run a Hyper9 with a different controller that can handle much higher voltage, like 300 or 400v.

2 ms·

The Netgain motors are wildly outdated. 100-140v in a world where 400v is almost standard, and 800v is increasingly common. Means you need very heavy duty wiri

by KennyBlanken 5y ago

ChuckNorris89 5y ago
>can't use OEM power steering / AC compressors And why not? Power steering systems don't run on the HV system but on the LV system as every electric car has a DC/DC converter that bridges the HV and LV domains. So regardless if your cars is using 800V or 100V powertrain system, all the auxiliary equipment will still be on the 12V network.
elihu 5y ago
I basically agree with that, though I'd say that lower voltage motors are sometimes useful in conversions, since they usually have a smaller battery pack than what would be in an OEM vehicle (due to weight, cost, and having limited space to put the battery). Lower voltage doesn't really stop you from salvaging all those other parts from an OEM vehicle. I think it's usually just the motor controller and DC-DC converter that run at the full pack voltage. DC fast charging is a problem if the charger doesn't support the lower voltage. I have wondered whether the Hyper9 can actually run at a higher voltage without damage. I suppose the limiting factors are the insulation on the motor windings and the ability to dissipate heat. (The motor demagnetizes if it gets too hot, which is why the motor has a temperature sensor so the controller can back off before that happens.) The Hyper9 comes with a motor controller that's limited to 180 volts (that's for the 144v nominal version). I don't know if anyone's tried to run a Hyper9 with a different controller that can handle much higher voltage, like 300 or 400v.