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US 12,395,103 B2Granted
Standstill angle detection for salient motors
AssigneeHaier US Appliance Solutions, Inc.
InventorJoseph Wilson Latham
Life of this patent
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Abstract
A method for operating a salient motor is provided. In one example implementation, the method can include determining, via a controller of the motor, a series of estimated injection angles. The method can further include injecting, via the controller, a high-frequency signal into the motor at each of the series of estimated injection angles to provide a series of high-frequency signal injections. The method can further include, responsive to each of the series of high-frequency signal injections, processing, via the controller, one or more signals associated with each of the series of high-frequency signal injections. The method can further include determining, via the controller, one or more operating parameters based at least in part on the series of estimated injection angles.
Claims20
A method for operating a salient motor, the method comprising:
- determining, via a controller of the motor, a first estimated injection angle of a series of estimated injection angles;
- injecting, via the controller, a first high-frequency signal into the motor at the first estimated injection angle to provide a first high-frequency signal injection of a series of high-frequency signal injections;
- responsive to the first high-frequency signal injection, processing, via the controller, one or more signals associated with the first high-frequency signal injection;
- determining, via the controller, a second estimated injection angle of the series of estimated injection angles based at least in part on the one or more signals associated with the first high-frequency signal injection;
- injecting, via the controller, a second high-frequency signal into the motor at the second estimated injection angle to provide a second high-frequency signal injection of the series of high-frequency signal injections;
- responsive to the second high-frequency signal injection, processing, via the controller, one or more signals associated with the second high-frequency signal injection;
- determining, via the controller, a third estimated injection angle of the series of estimated injection angles based at least in part on the one or more signals associated with the first high-frequency signal injection and the one or more signals associated with the second high-frequency signal injection;
- injecting, via the controller, a third high-frequency signal into the motor at the third estimated injection angle to provide a third high-frequency signal injection of the series of high-frequency signal injections;
- responsive to the third high-frequency signal injection, processing, via the controller, one or more signals associated with the third high-frequency signal injection;
- and
- determining, via the controller, one or more operating parameters based at least in part on the first high-frequency signal injection, the second high-frequency signal injection, and the third high-frequency signal injection.
8 more elements
A motor assembly for an appliance, comprising:
- a motor comprising at least a rotor and a stator;
- a motor drive;
- a sensorless feedback system configured to determine an orientation of the rotor based at least in part on one or more electrical characteristics of the stator;
- and
- a controller operably coupled with the sensorless feedback system, the controller configured to:
- determine a first estimated injection angle of a series of estimated injection angles;
- inject a first high-frequency signal into the motor at the first estimated injection angle to provide a first high-frequency signal injection of a series of high-frequency signal injections;
- process one or more signals associated with the first high-frequency signal injection;
- determine a second estimated injection angle of the series of estimated injection angles based at least in part on the one or more signals associated with the first high-frequency signal injection;
- inject a second high-frequency signal into the motor at the second estimated injection angle to provide a second high-frequency signal injection of the series of high-frequency signal injections;
- process one or more signals associated with the second high-frequency signal injection;
- determine a third estimated injection angle of the series of estimated injection angles based at least in part on the one or more signals associated with the first high-frequency signal injection and the one or more signals associated with the second high-frequency signal injection;
- inject a third high-frequency signal into the motor at the third estimated injection angle to provide a third high-frequency signal injection of the series of high-frequency signal injections;
- process one or more signals associated with the third high-frequency signal injection;
- and
- determine one or more operating parameters based at least in part on the first high-frequency signal injection, the second high-frequency signal injection, and the third high-frequency signal injection.
13 more elements
An appliance, comprising:
- a base;
- a head pivotally mounted to the base;
- a motor disposed within the head;
- a mixer shaft rotatably mounted on the head;
- and
- a controller operably coupled to the motor, the controller configured to:
- determine a first estimated injection angle of a series of estimated injection angles;
- inject a first high-frequency signal into the motor at the first estimated injection angle to provide a first high-frequency signal injection of a series of high-frequency signal injections;
- process one or more signals associated with the first high-frequency signal injection;
- determine a second estimated injection angle of the series of estimated injection angles based at least in part on the one or more signals associated with the first high-frequency signal injection;
- inject a second high-frequency signal into the motor at the second estimated injection angle to provide a second high-frequency signal injection of the series of high-frequency signal injections;
- process one or more signals associated with the second high-frequency signal injection;
- determine a third estimated injection angle of the series of estimated injection angles based at least in part on the one or more signals associated with the first high-frequency signal injection and the one or more signals associated with the second high-frequency signal injection;
- inject a third high-frequency signal into the motor at the third estimated injection angle to provide a third high-frequency signal injection of the series of high-frequency signal injections;
- process one or more signals associated with the third high-frequency signal injection;
- and
- determine one or more operating parameters based at least in part on the first high-frequency signal injection, the second high-frequency signal injection, and the third high-frequency signal injection.
14 more elements
Dependencies are inferred from the claim text.