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US 2020/0067433 A1Published application
Switched reluctance motor control system
AssigneeCaterpillar Inc.
InventorsAhmed KHALIL, Sam HAN, James THORNE, Jesse GERDES, Jackson WAI, Carlos NINO BARON, Sajan ABDUL
Life of this patent
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Abstract
A device may receive a current measurement of a motor identifying a plurality of component currents associated with a plurality of phases. The device may determine a position estimate for the motor based on the plurality of component currents associated with the plurality of phases. The device may control the motor based on the plurality of component currents.
Claims20
A switched reluctance motor control system, comprising:
- a memory;
- and
- one or more processors configured to:
- cause a current to be provided to a switched reluctance motor;
- determine a plurality of component currents associated with a plurality of phases based on a result of causing the current to be provided to the switched reluctance motor;
- determine that a first component current, of the plurality of component currents, is equal to a second component current of the plurality of component currents;
- determine, based on whether a third component current, of the plurality of component currents, is greater than or less than the first component current and the second component current, an angular position estimate for the switched reluctance motor;
- and
- control, based on the angular position estimate, the switched reluctance motor.
6 more elements
A method, comprising:
- receiving, by a device, a current measurement of a motor identifying a plurality of component currents associated with a plurality of phases;
- determining, by the device, that a first component current, of the plurality of component currents, is equal to a second component current of the plurality of component currents;
- determining, by the device, a position estimate for the motor based on determining that the first component current is equal to the second component current;
- and
- controlling, by the device, the motor based on the plurality of component currents.
2 more elements
A machine, comprising:
- a motor including a stator and a rotor;
- an inverter coupled to the motor;
- and
- a controller configured to:
- cause the inverter to provide a current associated with a priming voltage to the motor,
- wherein the current is associated with a plurality of phases to the motor, and
- wherein the current is modulated based on back electromotive force (EMF) associated with the motor;
- determine, based on causing the inverter to provide the current, a plurality of component currents corresponding to the plurality of phases,
- wherein the plurality of component currents include a first component current and one or more of a second component current or a third component current;
- determine whether the first component current is greater than or less than one or more of the second component current or the third component current;
- determine, based on whether the first component current is greater than or less than one or more of the second component current or the third component current, an initial position estimate for the stator or the rotor;
- and
- control the inverter and the motor using at least one command signal based on the initial position estimate.
10 more elements
Dependencies are inferred from the claim text.