Braking device for an electric motor, electrical apparatus...

Details Braking device for an electric motor, electrical apparatus... Braking device for an electric motor, electrical apparatus...

2006-07-04

2006-07-04

Martin, David (Department: 2837)

Electricity: motive power systems

Braking

Dynamic braking

C318S381000, C318S362000, C318S367000, C318S380000

Reexamination Certificate

active

07071645

ABSTRACT:
A braking device for an electric motor of a power tool has a short circuit switch for short circuiting an armature winding of the electric motor during a braking process, the short circuit switch for controlling its switch condition having a control input, a control unit connected with the control input of the short circuit switch for performing a phase control of the short circuit switching during the braking process in order to avoid brush fire; also an electrical device with such a braking device and a braking method are proposed as well.

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