Electrical vibration type compressor

Details Electrical vibration type compressor Electrical vibration type compressor

1975-04-01

1977-05-31

Duggan, Donovan F.

Electricity: motive power systems

Reciprocating or oscillating motor

Energizing winding circuit control

318130, 318132, 310 27, 417417, H02K 3318

Patent

active

040272117

ABSTRACT:
An electrical vibration type compressor comprising a drive coil vibratably supported in a mechanical vibration system, a piston driven by the drive coil, at least one main semiconductor element with a control electrode which performs the switching control of a drive current to the drive coil, and a detecting means consisting of at least one detecting semiconductor element with a control electrode detecting the vibration of the drive coil to control the conduction and cutoff of the main semiconductor element with a control electrode and at least one timeconstant circuit; whereby the feedback transformer which has so far been used in a device of this type to supply a feedback current to the main semiconductor element with a control electrode is eliminated, and the switching operation is properly performed at the top and bottom dead centers of the piston.

REFERENCES:
patent: 3469163 (1969-09-01), Mathews
patent: 3575649 (1971-04-01), Mathews
patent: 3671829 (1972-06-01), Mathews
patent: 3676758 (1972-07-01), Mathews
patent: 3729691 (1973-04-01), Beiswinger et al.
patent: 3781140 (1973-12-01), Gladden

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