Which type of electric motor is most affected by over voltage?

Which type of electric motor is most affected by over voltage?

Small motors tend to be more sensitive to overvoltage and saturation than do large motors. Single-phase motors tend to be more sensitive to overvoltage than do 3-phase motors. U-frame motors are less sensitive to overvoltage than are T-frames.

How does a brushless motor go bad?

If you overeceed the rpm of the rotor, or overheat it, on certain motors you can either debond the rotor, or blow the magnets off the shaft. The sensor board has been known to go bad occasionally. A stator or a sensor board will typically just stop working not just wear out.

What happens when I overvolt a brushless motor?

If there is a load, doubling the speed may increase the load dramatically thus increasing the current and increasing the power developed in the resistance of the winding. The load will particularly increase dramatically if there is something like a propellor connected to the motor.

Can You double the speed of a magnet brushed motor?

For a permanent magnet brushed motor, at the voltage level in question, the effect of doubling the voltage is mostly a question of the effect of doubling the speed. With no load connected to the motor, will probably be ok at twice the rated voltage and twice the rated speed.

How to calculate the current of a brushless motor?

The current is given by I = (V – E) / R, where V is the supply voltage, E is the back EMF (proportional to speed) generated in the motor and R is the winding resistance. If there is no load, E is practically equal to V when the motor is running at full speed.

Can a 48V brushless motor kit be used?

The name says it all. ive purchased a 48v 1000w brushless gearless hub motor kit from ebay. it works perfectly. as a heads up, im running a pedal bike with no pedals/pedaling so essentially a cheap electric motorbike. .only had it today and im very much impressed.