Controller and method for transitioning between control angles
First Claim
1. A control system for a motor in a refrigeration system, the control system comprising:
- an angle determination module configured to generate an output rotor angle indicative of a desired angle of a rotor of the motor;
a control module configured to control current supplied to the motor based on the output rotor angle; and
an estimator module configured to determine an estimated rotor angle of the motor,wherein the angle determination module is configured to;
upon startup of the motor, generate the output rotor angle based on a first rotor angle,upon generation of a transition signal, generate the output rotor angle based on both (i) the first rotor angle and (ii) the estimated rotor angle, andsubsequent to generation of the transition signal, reduce a contribution of the first rotor angle to the output rotor angle over time until the output rotor angle is based on the estimated rotor angle independent of the first rotor angle.
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Accused Products
Abstract
A control system for a motor in a refrigeration system includes an angle determination module configured to generate an output rotor angle indicative of a desired angle of a rotor of the motor. The control system controls current supplied to the motor based on the output rotor angle. The control system determines an estimated rotor angle of the motor. The angle determination module, upon startup of the motor, generates the output rotor angle based on a first rotor angle. Upon generation of a transition signal, the angle determination module generates the output rotor angle based on both the first rotor angle and the estimated rotor angle. Subsequent to generation of the transition signal, the angle determination module reduces a contribution of the first rotor angle to the output rotor angle over time until the output rotor angle is based on the estimated rotor angle independent of the first rotor angle.
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Citations
20 Claims
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1. A control system for a motor in a refrigeration system, the control system comprising:
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an angle determination module configured to generate an output rotor angle indicative of a desired angle of a rotor of the motor; a control module configured to control current supplied to the motor based on the output rotor angle; and an estimator module configured to determine an estimated rotor angle of the motor, wherein the angle determination module is configured to; upon startup of the motor, generate the output rotor angle based on a first rotor angle, upon generation of a transition signal, generate the output rotor angle based on both (i) the first rotor angle and (ii) the estimated rotor angle, and subsequent to generation of the transition signal, reduce a contribution of the first rotor angle to the output rotor angle over time until the output rotor angle is based on the estimated rotor angle independent of the first rotor angle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A control method for a motor in a refrigeration system, the method comprising:
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generating an output rotor angle indicative of a desired angle of a rotor of the motor; controlling current supplied to the motor based on the output rotor angle; and determining an estimated rotor angle of the motor, wherein the generating the output rotor angle includes; upon startup of the motor, generating the output rotor angle based on a first rotor angle, upon generation of a transition signal, generate the output rotor angle based on both (i) the first rotor angle and (ii) the estimated rotor angle, and subsequent to generation of the transition signal, reduce a contribution of the first rotor angle to the output rotor angle over time until the output rotor angle is based on the estimated rotor angle independent of the first rotor angle. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification