Phase angle control for synchronous machine control

Details Phase angle control for synchronous machine control Phase angle control for synchronous machine control

2006-06-20

2006-06-20

Masih, Karen (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

C318S712000, C318S798000

Reexamination Certificate

active

07064513

ABSTRACT:
A synchronous machine with 3-phase sensors set 120° apart and 90° advanced is used to provide commutation from a direct current source. A time delay circuit with an electronically implemented algorithm controls torque by delaying the 90° advance. This delay is controlled by a linear voltage, independent of frequency, and can be used to control position, speed, or acceleration. A delay beyond 90° advance causes commutation to cease, and the alternating current machine switches to a generator, indicative of motive power being applied. If motive power ceases, the alternating current machine switches to a motor. Controlled switching can be less than half of one hertz.

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