US 7,321,216 B2
Motor control apparatus and vehicle steering apparatus using the same
Hiroshi Suzuki, Okazaki (Japan)
Assigned to JTEKT Corporation, Osaka-shi (Japan)
Appl. No. 10/582,088
PCT Filed Nov. 17, 2004, PCT No. PCT/JP2004/017075
§ 371(c)(1), (2), (4) Date Jun. 08, 2006,
PCT Pub. No. WO2005/057774, PCT Pub. Date Jun. 23, 2005.
Claims priority of application No. 2003-411757 (JP), filed on Dec. 10, 2003.
Prior Publication US 2007/0126392 A1, Jun. 07, 2007
Int. Cl. H02P 6/08 (2006.01)
U.S. Cl. 318—609  [318/254; 318/661; 388/906; 180/443] 5 Claims
OG exemplary drawing
 
1. A motor control apparatus for vector-controlling a DC brushless motor with a motor control CPU based on a motor rotation angle detected by 1-phase excitation 2-phase output type resolver, comprising:
a trigger means for outputting a trigger signal based on an excitation signal of the resolver;
a holding means for holding at least 2-phase current signals of 3-phase current signals composed of phase U, phase V, phase W for driving the DC brushless motor and cos phase signal outputted from the resolver based on the trigger signal;
an acquiring means for acquiring q-axis current instruction value of d-axis, q-axis current instruction values to be converted to the 3-phase current signals; and
a determining means that determines whether the motor control CPU is normal or abnormal based on consistency or inconsistency of the polarity signs introduced from the relation based on a predetermined expression among the cos phase signal, the q-axis current instruction value and the 2-phase current signals and outputs its determination result as determination information, wherein
the trigger means, the holding means, the acquiring means and the determining means are constituted of a logic circuit functionally independent of the motor control CPU.