The signals for the brushВ motor is quite simple while the signals for the brushlessВ motor can be quite complicated.ДЇor example, in the case of the brush motor, A component with the name: phase width modulator (PWM) take the signal control from the Throttle or from the measurement of the human power and turn it to a certain waveform with a certain voltage and frequency, which determined the motor speed:ДЇorth, in some advanced system, you can control not just the level of assistance but also the level of regenerating (REGEN). Eventually, by varying the magnetic field or the current of the motor's coils the bicycle speed is being changed. The controller have to make sure that the those signals would not overload the motor.Д®ach type of motor requires different signals. Based on the inputs from the battery and the throttle/pedelec, signals are being sent to the motor to ultimately move the bicycle. Modify the current and voltage levels based on temperature measurements.Keep the current that is drawn from the batteries between certain levels.Here is a bunch of examples of what the controller should do to protect the battery: It is a very important task and most of the advanced controllers in today market is taking care off that. The Li-Ion battery, for example, is very sensitive to over discharging. And in plain words, giving a nice treatment of the battery. Second, the controller has to make sure not to over-stress the batteries. It's internal circuitry has to know whether to just drive a certain current and voltage to the motor based on the input from the throttle or it has to use some sophisticated measurement of the human power in order to know how much power should be headed to the motor. First of all, the controller need to be fitted to the propulsion system: Pedelec or Power On Demand (Throttle).

Electric bike speed controller