Stepping motor driver

Details Stepping motor driver Stepping motor driver

2005-09-20

2005-09-20

Ip, Paul (Department: 2837)

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

C318S701000, C318S696000, C318S254100

Reexamination Certificate

active

06946814

ABSTRACT:
A stepping motor driver comprises: an excitation angle generating means which generates an excitation angle from an external command pulse; a current control means which controls exciting currents for a stepping motor according to the excitation angle and a current command; a current detection means which detects phase currents of the stepping motor; an angle detection means which detects a rotor rotation angle of the stepping motor; a torque component current calculating means which calculates a torque component current from the phase currents and the rotor rotation angle; an absolute converting means which obtains the absolute value of the torque component current; and a current command output means which outputs the current command depending on the absolute value of the torque component current.

REFERENCES:
patent: 4740738 (1988-04-01), El-Antably et al.
patent: 6730001 (2004-05-01), Vohmann et al.
patent: 2004/0204902 (2004-10-01), Kokubo et al.
patent: 2004/0232862 (2004-11-01), Wogari et al.

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