Multispeed alternating current motor
AssigneeQM Power, Inc.
InventorsCharles J. FLYNN, Cooper N. Tracy, W. Scott Hunter, Stephen B. Nichols
Life of this patent
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Abstract
A system is for a machine having an alternating current (AC) power source with a first side and a second side, one or more windings, an AC polarity detector, a Hall effect device, two or more pairs of power switches, and a motor controller. The motor controller determines which of the power switches to open or close to obtain a direction of current flow through the one or more windings based on signals from the AC polarity detector and the Hall effect device.
Claims10
1-32. (canceled)
A circuit for a machine having alternating current (AC) power source having a first side (L1) and second side (L2), the circuit comprising:
- a winding with a start side and an end side;
- a first power switch connected between the first side and the winding start side;
- a second power switch connected between the second side and the winding start side;
- a third power switch connected between the first side and the winding end side;
- a fourth power switch connected between the second side and the winding end side;
- and
- a motor controller configured to:
- receive a signal from an AC polarity detector and another signal from a Hall effect device and determine which of the power switches to open or close to obtain a proper direction of current flow through the winding based on the signal and the other signal.
Dependencies are inferred from the claim text.