Electricity: motive power systems – Braking – Automatic and/or with time-delay means
Patent
1974-06-24
1977-03-29
Dobeck, B.
Electricity: motive power systems
Braking
Automatic and/or with time-delay means
318471, 62228, 318254, H02K 2900
Patent
active
040151824
ABSTRACT:
A refrigeration system is disclosed as comprising a compressor driven by an electronically commutated D.C. motor for circulating a suitable coolant through a condenser and then an evaporator disposed within a chamber or compartment to be cooled. The system is particularly adapted for use as an air conditioning system for automobiles and recreational vehicles, as portable refrigerating apparatus in recreational vehicles, and refrigerating apparatus for trucks or other transport vehicles. In such applications, a power source such as a battery, alternator, or generator (or rectified alternating current) serves to energize the motor. The motor may be operated by an electronic commutating circuit responsive to the position of the rotor of the D.C. motor for efficiently commutating the energizing signals applied to the stator windings of the brushless D.C. motor. The level of energization is set in accordance with the desired temperature to be maintained by the refrigeration system, whereby the D.C. motor is energized to drive the compressor at a selected speed corresponding to the desired temperature. The degree of stator energization may be controlled by: 1) regulating the output of the power source, or 2) regulating directly the commutating circuit to control the current signals applied to the stator windings.
REFERENCES:
patent: 3353076 (1967-11-01), Haines
patent: 3384801 (1968-05-01), Rodgers
patent: 3531702 (1970-09-01), Hill
patent: 3577053 (1971-05-01), McGee
patent: 3581173 (1971-05-01), Hood et al.
patent: 3633084 (1972-01-01), Rakes
patent: 3634873 (1972-01-01), Nishimura
patent: 3780363 (1973-12-01), Doemen
patent: 3783357 (1974-01-01), Ichiyanage
patent: 3831073 (1974-08-01), Tanikoshi
Dobeck B.
General Electric Company
Krisher, Jr. Ralph E.
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