Method and circuit arrangement for operating stepper motors

Details Method and circuit arrangement for operating stepper motors Method and circuit arrangement for operating stepper motors

2007-11-27

2007-11-27

Donovan, Lincoln (Department: 2837)

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

C318S696000

Reexamination Certificate

active

10517174

ABSTRACT:
A method and a circuit arrangement for operating stepper motors or other appropriately dimensioned synchronous motors is disclosed in which between a first operational mode for normal motor operation and a second operational mode for detecting an operating state of the motor like for example its load can be switched. The method and the circuit arrangement is especially provided for determining a reference position of the motor without sensors by driving the motor against a mechanical stop wherein an increase of the load which is caused by this, is detected as a change of the operating state (FIG.1).

REFERENCES:
patent: 4480218 (1984-10-01), Hair
patent: 6091221 (2000-07-01), Higuchi
patent: 6163126 (2000-12-01), Kojima et al.
patent: 6262554 (2001-07-01), Kojima et al.

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