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4

The paper is about using the EV motor windings as a transformer or inductors as part of the charger when the vehicle is charging instead of using a separate component. A common problem of doing so is that the motor will produce unwanted rotation (torque) while the car is being charged. The study describes the various approaches used to avoid that situation.


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The author is talking about charging an electric vehicle by re-using its drive train electronics (that is, the power electronics that drive the motor). This means that currents can flow through the motor's windings while charging, which would cause the motor to create mechanical torque. It therefore has to be locked in place to prevent it from spinning up. ...


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The answer is yes and no. If you connect the power supply with the motor's nominal voltage at standstill the motor would draw a stall current, this would happen also if the rotor is locked. It may draw this current for a very short period of time, like for startup. You can supply the motor with a fixed voltage power supply with an additional thermal circuit ...


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Is the stall current the highest amount of current the motor can draw at one time. For a brushed DC motor, the locked rotor current is the greatest amount of current the motor will draw, unless you are trying to reverse direction of rotation. If so would I need a motor driver that can supply a continuous current of at least 2.7 amps, to be on the safe side?...


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Well, you have an obligation to make sure that the final system does not experience driver failure when the motor is stalled. Motors can stall for a variety of reasons. But there is more than one way to achieve this. Keep in mind, also, that the motor will almost certainly fail if full stall current is allowed to continue for an extended period. You could ...


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I have learned that brushless motors can be used in water This is only really true for motors that are designed to be submersible. A regular motor may run for a while if the case is well sealed, but water will still get in through the shaft bearings. This will eventually corrode any exposed metal parts, including the magnets and bearings. If the inside ...


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