Electrical control apparatus

Details Electrical control apparatus Electrical control apparatus

1975-10-06

1978-01-03

Schaefer, Robert K.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

H02P 700

Patent

active

040669408

ABSTRACT:
A control apparatus for supplying a load device, such as a motor, from a d.c. supply, by means of semiconductor control devices, particularly controlled rectifiers. A capacitor is charged through the load, through a circuit including one semiconductor control device, and the capacitor is then discharged through the load, direction of current flow through the load the same as the charging current, by a second semiconductor control device. The frequency of operation is variable; the apparatus can be adapted to give current flow always in one direction or always in the opposite direction through the load.

REFERENCES:
patent: 3303405 (1967-02-01), Schwarz
patent: 3332001 (1967-07-01), Schwarz
patent: 3614581 (1971-10-01), Frost
patent: 3697839 (1972-10-01), Unnewehr
patent: 3714533 (1973-01-01), Unnewehr

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