Method and apparatus for embedding motor error parameter data in a drive motor of a power driven wheelchair

• US 20060119298A1
• Filed: 01/23/2006
• Published: 06/08/2006
• Est. Priority Date: 10/16/2003
• Status: Active Grant

• Current Assignee: Invacare Corporation
• Original Assignee: Invacare Corporation
• Inventors: Curran, Neal Joseph, Strothmann, Thomas, Wakefield, Theodore D. II
• Granted Patent: US 7,148,638 B2
• Time in Patent Office: Days
• US Class Current: 318/139
• CPC Class Codes: H02P 6/00 Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor vector control H02P21/00
• CPC Class Codes: H02P 6/16 Circuit arrangements for detecting position
• CPC Class Codes: H02P 6/32 Arrangements for controlling wound field motors, e.g. motors with exciter coils
• CPC Class Codes: Y10S 388/903 Protective, e.g. voltage or current limit

Abstract

A drive motor assembly for a power driven wheelchair comprises: a stator housing for containing field coils of a stator of the motor assembly; at least one sensor disposed in the stator housing for sensing rotation of the motor; a memory storing motor error parameter data including data of errors of the at least one sensor, the memory being embedded in the stator housing; and a connection for accessing the error parameter data of the memory from the stator housing. The motor error parameter data may be accessed from the embedded memory of the drive motor by a programmed motor controller for use in controlling the drive motor. Also, the motor error parameter data may be embedded in the drive motor by the steps of: controlling the motor through at least one predetermined drive pattern; sensing motor rotation during the drive pattern and generating signals representative thereof; deriving error parameter data of the drive motor from the generated signals; programming a memory with the derived error parameter data; and embedding the memory in the drive motor.

Claims

1-23. -23. (canceled)

24. A control system for a power driven wheelchair comprising:

a motor controller for controlling at least one drive motor; and

at least one drive motor assembly comprising;

at least one sensor disposed in a stator housing for sensing rotation of said motor;

a memory storing motor error parameter data, said memory being embedded in said stator housing; and

circuitry for accessing said error parameter data stored in said memory.

25. A control system for a power driven wheelchair comprising:

a motor controller for controlling at least one drive motor; and

at least one drive motor assembly, the at least one drive motor comprising

a stator housing having field coils of a stator of said motor assembly;

at least one sensor disposed in said stator housing for sensing rotation of said motor; and

a memory storing motor error parameter data including data errors of said at least one sensor, said memory being embedded in said stator housing, said motor controller operative to access the motor error parameter data from said embedded memory for use in controlling said drive motor.