Stepping motor driver

Details Stepping motor driver Stepping motor driver

2006-03-28

2006-03-28

Masih, Karen (Department: 2837)

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

C318S696000, C318S700000, C318S701000, C318S714000, C318S720000, C318S721000, C318S722000

Reexamination Certificate

active

07019484

ABSTRACT:
A stepping motor driver according to the present invention includes a torque component current calculating means for calculating a torque component current from phase currents and a rotor rotation angle, an absolute value converting means for obtaining an absolute value of the torque component current, a high speed-response judging means adapted for outputting a first control signal when a speed deviation between a command speed and a rotor speed is not more than a reference level, and outputting a second control signal when the speed deviation exceeds the reference level, and a current command outputting means adapted for outputting a current command according to the absolute value of the torque component current when the first control signal is outputted, and outputting a maximum current command value as the current command when the second control signal is outputted.

REFERENCES:
patent: 6850026 (2005-02-01), Takemori et al.
patent: 6850027 (2005-02-01), Kuwano et al.
patent: 2004/0178763 (2004-09-01), Kuwano et al.
patent: 08-098595 (1996-04-01), None
Ooki, Hagime, “Theory and Practice of Step Motor”, JIKKYO SHUPPAN Co., LTD., pp. 152-158.
Kenzyou and Sugawara, “Microcomputer Control of Stepping Motor”, SOUGOU-DENSHI SHUPPAN CO., LTD., pp. 231-233.

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