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US 8,552,673 B2Granted
Interior permanent magnet machine systems and methods for controlling interior permanent magnet machines
AssigneeDeere & Company
InventorsLong Wu, Robert Shaw
Life of this patent
Estimating the term…
Abstract
Example embodiments disclose an Interior Permanent Magnet (IPM) machine system including an IPM machine including a nominal operating direct current (dc) bus voltage, and a controller configured to detect an operating dc bus voltage of the IPM machine and to control the IPM machine based on the nominal operating dc bus voltage and the detected operating dc bus voltage.
Claims18
An Interior Permanent Magnet (IPM) machine system comprising:
- an IPM machine including a nominal operating direct current (dc) bus voltage;
- and
- a controller configured to detect an operating dc bus voltage of the IPM machine and to control the IPM machine based the nominal operating dc bus voltage and the detected operating dc bus voltage, wherein the controller is configured to detect an operating rotor shaft speed of the IPM machine, determine a ratio of the detected operating dc bus voltage to the detected operating rotor shaft speed and control the IPM machine based on the determined ratio.
A method of controlling an Interior Permanent Magnet (IPM) machine comprising:
- determining an operating dc bus voltage of the IPM machine and a nominal dc bus voltage of the IPM machine, the determining including,
- determining an operating rotor shaft speed of the IPM machine;
- subsequently determining a drive command based on the operating dc bus voltage of the IPM machine and the nominal dc bus voltage of the IPM machine, the subsequent determining includes,
- determining a ratio between the operating dc bus voltage and the operating rotor shaft speed,
- adjusting the determined ratio by multiplying an associated compensation coefficient with the determined ratio, and
- determining the drive command based on the adjusted ratio;
- and
- outputting the determined drive command to the IPM machine.
5 more elements
An Interior Permanent Magnet (IPM) machine system comprising:
- an IPM machine;
- and
- a controller configured to detect an operating dc bus voltage and operating rotor shaft speed of the IPM machine, determine a ratio of the detected operating dc bus voltage to the detected operating rotor shaft speed and control the IPM machine based on the determined ratio.
Dependencies are inferred from the claim text.