Title:
Method and system of testing continuity for a motor and associated drive circuitry
Document Type and Number:
WIPO Patent Application WO2002009999
Kind Code:
A3
Abstract:
A method and system for checking continuity of a motor 104, motor drive, motor relay 110, dc relay 108 and interconnections 122a-c thereof for a power steering system 204. The method and system of the invention produce minimal torque on a motor shaft 426 of the power steering system 204. The position of the motor shaft 426 is located using a Hall effect current sensor 114, a resolver and the like, depending on the type of motor. Thereafter, it is determined which switches 106a-f of an inverter circuitry 100 to switch to produce a minimal torque on the motor shaft 426. The inverter circuit 100 converts dc voltage from a power source 102 to ac voltage required by the motor 104. Thereafter, the switches 106a-f that produce the minimal torque on the motor shaft 426 are switched and current flow is checked to determine the continuity of the circuitry. To produce minimal torque on the motor shaft 426, the complementary pair of switches 106a-f to the first pair is then switched.
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Inventors:
O'GORMAN PATRICK A (US)
Application Number:
PCT/US2001/023107
Publication Date:
April 25, 2002
Filing Date:
July 20, 2001
Export Citation:
Assignee:
MOTOROLA INC (US)
International Classes:
B62D5/04; (IPC1-7): B62D5/04; G01R31/34
Foreign References:
| FR2749452A1 | 1997-12-05 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 018, no. 663 (M - 1723) 14 December 1994 (1994-12-14)
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 01 28 February 1995 (1995-02-28)
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 01 28 February 1995 (1995-02-28)
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