ELECTRIC POWER STEERING CONTROL DEVICE

• Main Author: HAYASHI JIRO
• Format: Patent
• Language: English
• Published: 12.10.2006
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; MOTOR VEHICLES; PERFORMING OPERATIONS; TRAILERS; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a vehicle motor control device that achieves smooth and accurate steering control in a small steering range. SOLUTION: A duty operator 24 sets a duty command value Du of an upper arm element to a value of prescribed times a duty command value Dd of a lower arm element in a large duty region, and in a small duty region, the operator sets the duty command values Du, Dd of the lower arm element to a prescribed constant value Dmim. A current sensor 3 samples a motor current at the turn-off timing of the lower arm element. In a region, however, where the duty command value Dd of the lower arm element is the constant value Dmin, and the duty command value Du of the upper arm element is larger than the constant value Dmin, a difference between a corrected current value operated on the basis of the duty command value Du and a current command value is obtained with the corrected current value regarded as a detection current value, and current feedback control can be conducted on the basis of the difference. COPYRIGHT: (C)2007,JPO&INPIT