Motor driving device having power failure detection function

Details Motor driving device having power failure detection function Motor driving device having power failure detection function

2010-12-02

2011-10-04

Masih, Karen (Department: 2837)

Electricity: motive power systems

Induction motor systems

Primary circuit control

C318S801000, C318S779000

Reexamination Certificate

active

08030878

ABSTRACT:
A motor driving device that accurately achieves power failure detection according to a power failure tolerance with a relatively simple configuration. A counter input computing unit determines, as a counter input value, a value that is inversely proportional to the power failure tolerance determined from a voltage amplitude value and supplies the counter input value to a counter. The counter accumulates the input value at predetermined intervals and outputs an output value. A comparator determines that power failure occurs if the output of the counter42exceeds a threshold value.

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