Control devices for use with a stepping motor

Details Control devices for use with a stepping motor Control devices for use with a stepping motor

1985-03-07

1987-01-06

Shoop, Jr., William M.

Electricity: motive power systems

Open-loop stepping motor control systems

318685, 364814, H02P 800

Patent

active

046349499

ABSTRACT:
A stepping motor generates first and second voltages each varying in accordance with a sinusoidal function having a period proportional to the period of rotation of the motor's rotor, the first and second voltages being in quadrature with each other. A control device generates from the first and second voltages a signal representative of a number that is proportional to the square root of the sum of the squares of the first and second voltages. This signal is used to modify the energizing current provided to the phase windings of the stator, in order to reduce fluctuations in torque and shaft angular velocity.

REFERENCES:
patent: 3870871 (1975-03-01), Nead

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