Switch assembly, electric machine having the switch assembly, and method of controlling the same
First Claim
Patent Images
1. A compressor comprising:
- a winding circuit comprising a winding;
a driven member driven in part by the winding;
an auxiliary circuit connected in a parallel relationship with the winding circuit, the auxiliary circuit comprising an auxiliary circuit element and an electronic switch assembly connected in a series relationship such tat the electronic switch assembly controls the current through the auxiliary circuit element, the electronic switch assembly comprisingan electronic switch, anda controller connected to the electronic switch to control the electronic switch, the controller comprising a current sensor that senses a current through the electronic switch, a scalar that generates a threshold based on the sensed current, and decision logic that controls the electronic switch based on the sensed current and the threshold; and
wherein the scalar generates a threshold having a relation to the sensed current such that the decision logic detects when the sensed current flares.
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Abstract
A compressor having a winding circuit and a driven member being driven in part by a winding of the winding circuit. The compressor further includes an auxiliary circuit connected in a parallel relationship with the winding circuit. The auxiliary circuit has an auxiliary circuit element and an electronic switch assembly connected in a series relationship such that the electronic switch assembly controls the current through the auxiliary circuit element.
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Citations
18 Claims
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1. A compressor comprising:
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a winding circuit comprising a winding; a driven member driven in part by the winding; an auxiliary circuit connected in a parallel relationship with the winding circuit, the auxiliary circuit comprising an auxiliary circuit element and an electronic switch assembly connected in a series relationship such tat the electronic switch assembly controls the current through the auxiliary circuit element, the electronic switch assembly comprising an electronic switch, and a controller connected to the electronic switch to control the electronic switch, the controller comprising a current sensor that senses a current through the electronic switch, a scalar that generates a threshold based on the sensed current, and decision logic that controls the electronic switch based on the sensed current and the threshold; and wherein the scalar generates a threshold having a relation to the sensed current such that the decision logic detects when the sensed current flares. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A compressor comprising:
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a winding circuit comprising a winding; a driven member driven in part by the winding; and an auxiliary circuit connected in a parallel relationship with the winding circuit, the auxiliary circuit comprising an auxiliary circuit element and an electronic switch assembly electrically connected in a series relationship such that the electronic switch assembly controls the current through the auxiliary circuit element, the electronic switch assembly comprising a triac, a pulse generator that provides a first signal comprising a plurality of pulses, a current sensor that senses a current trough the switch, the current sensor providing a second signal based on the sensed current, a timer that provides a third signal, and decision logic connected to the pulse generator, the current sensor, the timer, and the triac, the decision logic generating a control signal that selectively controls the triac based on the first second, and third signals. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification