Driving circuit for magnetic clutches for use with refrigerant c

Details Driving circuit for magnetic clutches for use with refrigerant c Driving circuit for magnetic clutches for use with refrigerant c

1981-01-29

1983-03-15

Herrmann, Allan D.

192 clutches and power-stop control

Clutches

Operators

192 84C, 361154, F16D 2700, F16D 2710, H01H 4704

Patent

active

043764762

ABSTRACT:
A driving circuit for a magnetic clutch for use with a refrigerant compressor, which comprises a time constant circuit, a first transistor disposed to conduct responsive to an output from the time constant circuit, a second transistor responsive to the conduction state of the first transistor to energize the magnetic coil of the magnetic clutch, and a limiting circuit for limiting the excitation of the magnetic coil through the second transistor in response to the conduction state of the first transistor. The magnetic coil is excited to an extent sufficient to cause engagement of the magnetic clutch during charging of the capacitor of the time constant circuit after energization of the time constant circuit. After saturation of the capacitor, the magnetic coil is excited to a lesser extent but sufficient to maintain the engagement of the magnetic clutch.

REFERENCES:
patent: 3084310 (1963-04-01), Schurr
patent: 3116441 (1963-12-01), Gieffers
patent: 3268045 (1966-08-01), Poumakis
patent: 3558997 (1971-01-01), Derc

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