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>All electric cars are torque-limited. They simply have to be. A static electric motor, of the type needed for higher speeds, given full voltage would not only

>All electric cars are torque-limited. They simply have to be. A static electric motor, of the type needed for higher speeds, given full voltage would not only snap bits of the drivetrain but rip apart its own mounts. So they are all limited to various degrees. Electric motors are far, far, more forgiving to drive-train components than sporty vehicles with manuals and medium duty trucks of equivalent power levels because there is no clutch to dump. Sure it's not quite as forgiving as an automatic transmission but it's close.

sandworm101 6y ago
No. Electric motors are potential torque beasts. That is why they, ALL of them in cars, are mated to motor controllers. The controller may be integrated into the motor assembly so as to give the impression that the motor is tame, but the reality is that every electric motor has the potential for damaging/dangerous levels of torque. https://en.wikipedia.org/wiki/Motor_controller https://en.wikipedia.org/wiki/Motor_controller "A motor controller is a device or group of devices that can coordinate in a predetermined manner the performance of an electric motor. [...] regulating or limiting the torque, and protecting against overloads..."
- birdyrooster 6y ago
  Well wouldn't the controller also be used to distribute the inverted power to the poles of the stator in sync with the rotation of the hub? I am pretty sure the controller could be there whether or not it was specifically modulating the torque to be lower.
- elihu 6y ago
  Motor controllers are necessary with AC motors to supply the 3-phase AC that the motors need in sync with the motor's rotation. (DC motor controllers are simpler, but I don't think DC motors are used in any modern commercially-produced EV.) This generally requires some amount of software. The motor generally has current and voltage and RPM and temperature limits, and the motor controller keeps everything within those limits. But the motor controller isn't there just for that reason, it's there because the motor couldn't function without it. DC motors are different; those you could just literally replace your gas pedal with an on/off button and wire it straight from the battery to the motor. Not that that's a good idea.

sandworm101 6y ago

No. Electric motors are potential torque beasts. That is why they, ALL of them in cars, are mated to motor controllers. The controller may be integrated into the motor assembly so as to give the impression that the motor is tame, but the reality is that every electric motor has the potential for damaging/dangerous levels of torque. https://en.wikipedia.org/wiki/Motor_controller https://en.wikipedia.org/wiki/Motor_controller "A motor controller is a device or group of devices that can coordinate in a predetermined manner the performance of an electric motor. [...] regulating or limiting the torque, and protecting against overloads..."

birdyrooster 6y ago
Well wouldn't the controller also be used to distribute the inverted power to the poles of the stator in sync with the rotation of the hub? I am pretty sure the controller could be there whether or not it was specifically modulating the torque to be lower.
elihu 6y ago
Motor controllers are necessary with AC motors to supply the 3-phase AC that the motors need in sync with the motor's rotation. (DC motor controllers are simpler, but I don't think DC motors are used in any modern commercially-produced EV.) This generally requires some amount of software. The motor generally has current and voltage and RPM and temperature limits, and the motor controller keeps everything within those limits. But the motor controller isn't there just for that reason, it's there because the motor couldn't function without it. DC motors are different; those you could just literally replace your gas pedal with an on/off button and wire it straight from the battery to the motor. Not that that's a good idea.