Hi. So here is my scenario:
-I don't have a multi-speed transmission
-I need high speed, low torque on a motor for cruising on flat ground
-But I also need high torque at low speed on the same motor for climbing
So, what happens is that the motor I need is able to apply way more torque than is practically needed. So what happens is to "cruise" on flat ground, I apply a high voltage to the motor, and since it's flat ground there is low torques involved (and low currents). However, if I hit something in the road or skidding occurs, the motor will pull an excessive amount of current to drive the load (which it can do because a high voltage was being applied to achieve the speed in the first place). But this torque now exceeds the mechanical limits of the system. There are no problems with high currents and low-speed since much less power is being involved and it just indicates low-speed movement over treacherous terrain.
Having mechanical torque limiting is cumbersome (and impractical since I don't have the parts). I was wondering if it would be more, less, or equally effective if I limited the current of the motor at higher speeds, since at higher speeds the torque/current should be low anyways. I know it would work, but I'm worried about whether the response is fast enough to save the mechanical system, since mechanical torque limiters have a response time of zero by definition (right?)
I had another post asking a "similar" thing. Except it involved limiting the current when overvolting the motor in order to achieve extra speed but not burn the motor out if extra load was applied. In this case, the motor is not being overvolted, nor will it burn out if more load is applied at top speed- instead the motor will break the mechanics.
-I don't have a multi-speed transmission
-I need high speed, low torque on a motor for cruising on flat ground
-But I also need high torque at low speed on the same motor for climbing
So, what happens is that the motor I need is able to apply way more torque than is practically needed. So what happens is to "cruise" on flat ground, I apply a high voltage to the motor, and since it's flat ground there is low torques involved (and low currents). However, if I hit something in the road or skidding occurs, the motor will pull an excessive amount of current to drive the load (which it can do because a high voltage was being applied to achieve the speed in the first place). But this torque now exceeds the mechanical limits of the system. There are no problems with high currents and low-speed since much less power is being involved and it just indicates low-speed movement over treacherous terrain.
Having mechanical torque limiting is cumbersome (and impractical since I don't have the parts). I was wondering if it would be more, less, or equally effective if I limited the current of the motor at higher speeds, since at higher speeds the torque/current should be low anyways. I know it would work, but I'm worried about whether the response is fast enough to save the mechanical system, since mechanical torque limiters have a response time of zero by definition (right?)
I had another post asking a "similar" thing. Except it involved limiting the current when overvolting the motor in order to achieve extra speed but not burn the motor out if extra load was applied. In this case, the motor is not being overvolted, nor will it burn out if more load is applied at top speed- instead the motor will break the mechanics.