Motor control apparatus and motor control method

Details Motor control apparatus and motor control method Motor control apparatus and motor control method

2007-06-12

2007-06-12

Donovan, Lincoln (Department: 2837)

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Slipping and/or racing control for electric motors

C318S053000, C318S054000, C318S055000, C318S056000, C318S057000, C318S093000, C318S432000, C318S434000

Reexamination Certificate

active

10525791

ABSTRACT:
In response to detection of a skid of drive wheels based on an increase in angular acceleration α of a rotating shaft of a motor, the control procedure of the invention refers to a map representing a variation in maximum torque Tmax against the angular acceleration α and sets torque restriction of the motor to limit the torque level of the motor to the maximum torque Tmax corresponding to a peak value of the angular acceleration α. When the torque restriction sufficiently lowers the angular acceleration α to detect convergence of the skid, the control procedure cancels the torque restriction to a certain level of the maximum torque Tmax corresponding to a torque restoration limit δ1, which is set according to the degree of the skid. The torque restoration limit δ1(that is, the maximum torque Tmax) is cancelled in a stepwise manner by a cancellation rate and a cancellation time corresponding to an additional accelerator depression relative to an accelerator opening at the time of detection of the skid. The control procedure sets the greater cancellation rate and the shorter cancellation time with an increase in additional accelerator depression.

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Japanese language version of Japanese Office Action No. JP-2002-251363, issued jan. 20, 2006.
English partial translation of Japanese Office Action No. JP-2002-251363, issued Jan. 20, 2006.
European Search Report for Appln. No. 03741238.4-2207, issued May 8, 2006.

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