Motor control

Details Motor control Motor control

1980-07-03

1982-06-22

Truhe, J. V.

Electricity: motive power systems

Open-loop stepping motor control systems

318432, G05B 1940

Patent

active

043364845

ABSTRACT:
Solid state control devices are placed in series with each field winding of a step motor having a field for each of two phases. Each control device has a control terminal selectively permitting stepping drive current flow through the series field winding and gate means controlling each terminal. Sequence control means selects the sequence of application of control signals to respective gate means to determine the sequence and direction of drive. A timed current chopper means applies a timed signal to the gate means to determine when the control signal and what part thereof may be applied to the control electrode of the control device to control and adjust the drive effect. In this environment, sensing means is provided to determine when and how much current is flowing in a given field winding and to provide a signal to a comparator which is used in controlling the chopper. Various control circuits are provided for sensing and control in this environment.

REFERENCES:
patent: 3967179 (1976-06-01), Loyzim
patent: 4107595 (1978-08-01), Campe
patent: 4145644 (1979-03-01), Liu
patent: 4255693 (1981-03-01), Keidl

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