| US 7,539,567 B2 | ||
| Electric power steering control apparatus | ||
| Yuji Takatsuka, Hyogo (Japan) | ||
| Assigned to Mitsubishi Denki Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Mar. 17, 2006, as Appl. No. 11/377,343. | ||
| Claims priority of application No. 2005-277850 (JP), filed on Sep. 26, 2005. | ||
| Prior Publication US 2007/0073462 A1, Mar. 29, 2007 | ||
| Int. Cl. B60T 11/00 (2006.01); B62D 3/00 (2006.01); B62D 11/24 (2006.01) | ||
| U.S. Cl. 701—41 [180/6.24; 180/443; 188/350] | 5 Claims |
| 1. An electric power steering control apparatus comprising:
a steering system including a steering wheel;
a torque sensor that detects steering torque applied to said steering system as torque information;
a motor that generates assist torque for said steering system;
a calculation section that calculates a motor current command value for said motor based on said torque information at each
predetermined sampling period; and
a motor current control section that drives and controls said motor based on said motor current command value;
wherein said calculation section includes:
a first target current calculation section that calculates a first target current based on said torque information detected
from said torque sensor in a time series manner at a first control period corresponding to said sampling period; and
a second target current calculation section that calculates a second target current based on said first target current at
a second control period that is shorter than said first control period; and
wherein said motor current control section controls said motor by using said second target current as said motor current command
value.
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