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;
an estimator module configured to determine an estimated rotor angle of the motor; and
a transition module configured to generate a transition signal in response to convergence of the estimator module,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 the 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 refrigeration system motor includes an angle determination module that generates an output rotor angle indicating a desired angle of a rotor of the motor. A control module controls the motor based on the output rotor angle. An estimator module determines an estimated rotor angle. A transition module generates a transition signal in response to convergence of the estimator module. Upon startup, the angle determination module generates the output rotor angle based on a first rotor angle. Upon generation of the transition signal, the angle determination module generates the output rotor angle based on the first rotor angle and the estimated rotor angle. After 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.
357 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; an estimator module configured to determine an estimated rotor angle of the motor; and a transition module configured to generate a transition signal in response to convergence of the estimator module, 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 the 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; determining an estimated rotor angle of the motor; and generating a transition signal in response to convergence of the estimated rotor angle, 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 the 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