Motor control apparatus and vehicle steering apparatus using...

Details Motor control apparatus and vehicle steering apparatus using... Motor control apparatus and vehicle steering apparatus using...

2008-01-22

2008-01-22

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Positional servo systems

'reset' systems

C318S254100, C318S661000, C388S906000, C180S443000

Reexamination Certificate

active

10582088

ABSTRACT:
This invention provides a motor control apparatus and vehicle steering apparatus capable of determining whether the motor control CPU is normal or abnormal with an inexpensive structure. A monitor circuit70of an ECU50outputs a trigger signal trg based on an excitation signal of a motor resolver42from a trigger output circuit71; samples and holds U-phase actual current value Iu, V-phase actual current value Iv and cos phase signal outputted from the motor resolver42with S/H circuit72based on the trigger signal trg; acquires q-axis current instruction value Iq* through wiring80; and determines whether the CPU60is normal or abnormal based on consistency or inconsistency of polarity signs introduced from the relation among the cos phase signal, q-axis current instruction value Iq*, U-phase actual current value Iu and V-phase actual current value Iv based on a predetermined expression with an operational circuit73, sign determining circuits74, 75, 76, multiplying circuit77and sign comparing circuit78and outputs “1” as determination information if it is normal and “−1” if it is abnormal.

REFERENCES:
patent: 6583593 (2003-06-01), Iijima et al.
patent: 6683774 (2004-01-01), Kameya et al.
patent: 6838844 (2005-01-01), Shimizu et al.
patent: 6885927 (2005-04-01), Arimura
patent: 11-341897 (1999-12-01), None
patent: 2000-23499 (2000-01-01), None
patent: 2003-231476 (2003-08-01), None

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