Method of controlling the supply of power to electrical loads wi

Details Method of controlling the supply of power to electrical loads wi Method of controlling the supply of power to electrical loads wi

1988-07-28

1989-10-03

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323271, 323322, 323350, 323351, 307 40, G05F 144

Patent

active

048719617

ABSTRACT:
A method of controlling the supply of power to electrical loads with a minimum of switching surges in which the loads are each electrically subdivided into at least two equal subloads. The subloads of each load can be connected each time arbitrarily in at least three main power stages to an A.C. mains. In order to obtain a minimum switching surge effect on the A.C. mains while providing finer power control six additional intermediate power stages are provided, in which starting from one of the three main power stages, the subloads are switched in a continuously repeated cycle of six A.C. half waves in the first intermediate power stages during the third and sixth half waves in each cycle and in the second intermediate power stages additionally during the second and fifth half waves each time to the next lower main power stage, which in the case of a series arrangement is that in which the power consumption is switched off.

REFERENCES:
patent: 4175249 (1979-11-01), Gruber
patent: 4282422 (1981-08-01), Payne et al.
patent: 4430609 (1984-02-01), Van Kessel et al.
patent: 4779038 (1988-10-01), Eckerfeld

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