Electromagnetic clutch with failure protection apparatus

Details Electromagnetic clutch with failure protection apparatus Electromagnetic clutch with failure protection apparatus

1994-04-11

1995-04-11

Pitts, Andrea L.

192 clutches and power-stop control

Clutches

Operators

192 82T, 192109R, F16D 2710

Patent

active

054049806

ABSTRACT:
A clutch for an automobile vehicle air conditioning compressor (8) adapted to be driven by a vehicle engine crankshaft through a drive rotor (52). The drive rotor includes an end plate (50) having a friction surface (48) adjacent to and spaced from a corresponding friction surface (46) of an armature plate (38). The armature plate (38) is mounted to and biased toward a clutch hub backplate (30) by leaf springs (34), with meltable stoppers (36) limiting movement in the biased direction. The rotor end plate (50) and the armature plate (38) include a plurality of sets of banana slots (44 and 54) for directing a magnetic flux path (78) emanating from a coil assembly (60) mounted within the rotor (52). Segments of low curie point material (76) are strategically placed along the flux path (78) and significantly increase in reluctance above a predetermined temperature in order to prevent damage to the clutch and compressor during a clutch slip condition.

REFERENCES:
patent: 4799578 (1989-01-01), Matsushita
patent: 4896756 (1990-01-01), Matsushita

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