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Bldc motor braking

Electrical Engineering Asked by TEC HUB on December 26, 2021

Which type of braking is most suitable for bldc motor?
Plugging or dynamic or degenerative braking.
For motion control application.

One Answer

Plugging is almost always a bad choice. It can not be controlled very well and it can be stressful for the motor.

Dynamic braking dissipates energy in braking in resistors and in the inherent losses in the motor and control system. It is a good alternative if there is not a lot of energy involved. To evaluate that, you need to examine the inertia, energy use and losses in the driven mechanical load. The control requirements depend on the performance required, but it generally less complicated and costly than regenerative braking.

Regenerative (not degenerative) braking returns braking energy to the power supply. To do that you need to evaluate the capacity of the power supply to accept the returned energy. The power electronic circuits of the motor control unit needs to be designed to return braking energy.

The decision depends on cost, importance of conserving energy, evaluation of design complexity and personal preference.

Answered by Charles Cowie on December 26, 2021

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