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US 9,325,262 B2Granted
Brushless motors with linear hall sensors
AssigneeWoodward, Inc.
InventorsRaymond Liu, Estella Chung, Joon H. Lee
Life of this patent
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Abstract
A motor system includes a motor including two linear Hall sensors configured to output analog signals, and a controller configured to control the motor. The controller is operable to monitor the analog signals output from the two linear Hall sensors, determine a plurality of auxiliary signals based on the analog signals, and determine a motor position based on the plurality of auxiliary signals.
Claims12
A motor system comprising:
- a motor comprising two linear Hall sensors configured to output analog signals;
- and
- a controller configured to control the motor, the controller being operable to:
- monitor the analog signals output from the two linear Hall sensors;
- determine, based on the analog signals, a plurality of auxiliary signals having a total number of predetermined zero-crossing points in a 360-electrical-degree span, the total number of predetermined zero-crossing points corresponding to a desired motor position resolution;
- and
- determine a motor position based on the plurality of auxiliary signals.
4 more elements
A method of operating a motor with two linear Hall sensors, the two linear Hall sensors operable to output analog signals, the method comprising:
- monitoring the analog signals output from the two linear Hall sensors;
- determining, based on the analog signals, a plurality of auxiliary signals having a total number of predetermined zero-crossing points in a 360-electrical-degree span, the total number of predetermined zero-crossing points corresponding to a desired motor position resolution;
- and
- determining a motor position based on the plurality of auxiliary signals.
1 more element
Dependencies are inferred from the claim text.