System and method to control a switched reluctance machine in continuous conduction
AssigneeCaterpillar Inc.
InventorsJackson Wai, Carlos Nino Baron, Jesse Gerdes, Ahmed Khalil
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Abstract
A control system for a switched reluctance (SR) machine is disclosed. The SR machine may have a rotor and a stator. The control system may have a converter circuit operatively coupled to the stator and including a plurality of gates in selective communication with each phase of the stator, and a controller in communication with each of the stator and the converter circuit. The controller may be configured to command a fixed dwell of a theta-on angle and a theta-off angle and a varying current command to the plurality of gates when the SR machine is in a continuous conduction mode.
Claims20
A control system for a switched reluctance (SR) machine having a rotor and a stator, the control system comprising:
- a converter circuit operatively coupled to the stator and including a plurality of gates in selective communication with each phase of the stator;
- and
- a controller in communication with each of the stator and the converter circuit, the controller configured to command a fixed dwell of a theta-on angle and a theta-off angle to the plurality of gates when the SR machine is in a continuous conduction mode, wherein the theta-on angle and the theta-off angle may vary during the continuous conduction mode but an angular difference between each stays constant.
An electric drive, comprising:
- a switched reluctance (SR) machine having a stator and a rotor rotatably disposed relative to the stator;
- a converter circuit operatively coupled to the stator and including a plurality of gates in selective communication with each phase of the stator;
- and
- a controller in communication with each of the stator and the converter circuit, the controller configured to control the plurality of gates during a continuous conduction mode according to a current command and a constant dwell of a theta-on angle and a theta-off angle, wherein the theta-on angle and the theta-off angle may vary during the continuous conduction mode but an angular difference between each stays constant.
A method of controlling a switched reluctance (SR) machine having a rotor, a stator, a converter circuit operatively coupled to the stator and including a plurality of gates in selective communication with each phase of the stator, and a controller in communication with each of the stator and the converter circuit, the method comprising:
- the controller determining a continuous conduction mode of the SR machine;
- and
- when the SR machine is in the continuous conduction mode, the controller driving the plurality of gates of the converter circuit according to a current command and a fixed dwell of a theta-on angle and a theta-off angle, wherein the theta-on angle and the theta-off angle may vary during the continuous conduction mode but an angular difference between each stays constant.
Dependencies are inferred from the claim text.