Single phase AC synchronous motor

Details Single phase AC synchronous motor Single phase AC synchronous motor

2011-05-24

2011-05-24

Colon Santana, Eduardo (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Brushless motor closed-loop control

C318S400110, C318S400290, C318S778000, C318S816000

Reexamination Certificate

active

07948193

ABSTRACT:
An inexpensive, productivity-enhanced single-phase AC synchronous motor in which stabilized synchronous pull-in can be carried out by suppressing generation of counter torque during a starting operation. Starting operation is performed while the energizing range of motor current is suppressed such that the energizing direction of motor current waveform lagging in a phase behind the output waveform from a detection sensor (17) is switched at at least the zero cross point of the output waveform from the sensor when the number of revolutions of a permanent magnet rotor (1) reaches a predetermined number of revolutions in the vicinity of the synchronous number of revolutions.

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