Device for controlling heating element power

Details Device for controlling heating element power Device for controlling heating element power

1995-09-29

1997-07-08

Elms, Richard T.

Electrical transmission or interconnection systems

Capacitor

219482, H02J 300

Patent

active

056464606

ABSTRACT:
A control device for heating elements, particularly for use in household electrical appliances such as cookers, cooking hobs, ovens and the like, comprising a driven switch in series with the, a first capacitor acting as a filter in parallel with the load, a second capacitor acting as a freewheeling capacitor operationally in series with the load and with the capacitor, these two being connected in parallel, and at least one inductor means in series with the load, characterised in that: a) the driven switch is a static switch hence able to assume an open state and a closed state; b) an inductor is provided in parallel with the load, or alternatively a section of the inductor means is in parallel with the load; c) a freewheeling diode is provided connected between an intermediate point between the inductor or section and freewheeling capacitor and an intermediate point between the load and static switch, so that when the static switch is in one state the freewheeling capacitor is charged via the freewheeling diode, the load and the inductor, whereas when in the other state the capacitor is discharged via the load, the inductor and the static switch.

REFERENCES:
patent: 4996462 (1991-02-01), Krummel
patent: 5461286 (1995-10-01), Hirschmann

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