Can Brushless DC Motor be Used as Generator?

The equipment can run at low speed and high power, which can save the speed reducer from directly driving large loads. Many people have doubts about whether the brushless DC motor can be used as a generator under certain conditions. Can the two be replaced with each other?

The magnetism of brushless DC motor is different from that of generator, which is divided into excitation and self-excitation. There is an excitation coil to adjust the magnitude and direction of current. A rotating excitation coil exists in the form of direct current, circulating around a line resistance, and reversible current changes its current direction in the same way.

The voltage and current of the generator follow a fixed line, and the electromagnetic circle also follows a certain trajectory. Generators have no carbon brushes, that is, the armature voltage to be transmitted to the motor rotor, so that the rotor rotates, it needs current to excite. Without armature, two copper sheets will produce strong resistance without contact, which is very dangerous to a certain extent.

Generator can achieve self-sufficiency in current, BLDC motor can not supply power to itself, its current and voltage still depend on the power supply current to drive, in terms of safety measures, the two also adopt completely different protective measures.

If brushless DC motor completely does the work of the generator, its own hardware not to mention, considering the function can not fully achieve the function of power generation. If the generator is used to do brushless dc motor work, its own conditions are not appropriate, it has no way to achieve speed regulation function.

Therefore, brushless DC motor is not suitable for being used as a generator, and it is impossible for a generator to replace a brushless dc motor.