Speed monitoring device

Details Speed monitoring device Speed monitoring device

2008-05-27

2008-05-27

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Armature winding circuits

C318S254100, C318S268000, C318S434000

Reexamination Certificate

active

11522247

ABSTRACT:
A device for redundant speed monitoring of a synchronous motor, which is sine-commutated without the use of sensors and which has a permanently magnetically excited rotor, has a first control unit, a drive output stage, a plurality of drive phases, and a second control unit for monitoring an electrical value of at least one of the drive phases and connected to the drive output stage for turning off the drive output stage when an improper speed state is detected.

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