Method for low-transient power control of electrical loads and e

Details Method for low-transient power control of electrical loads and e Method for low-transient power control of electrical loads and e

1998-08-31

2000-02-22

Berhane, Adolf Deneke

Electricity: power supply or regulation systems

External or operator controlled

Phase controlled switching using electronic tube or a three...

323267, 323350, 323351, G05F 144

Patent

active

060284218

ABSTRACT:
A method for the low-transient power control of electrical loads, particularly temperature-dependent loads electrically divided into essentially equal sub-loads connectable to an a.c. mains in order to receive power. Power control at low power levels utilizes alternately power-off phases, in which none of the sub-loads receive power for at least three a.c. half-waves, and heating phases, in which a temporal concatenation of at least a first and a second basic cycle of three a.c. half-waves supply power to each one of the sub-loads. The first sub-load receives power during one half-wave of the first basic cycle and the second sub-load receives power during one half-wave of the second basic cycle. The power is turned off during the other two half-waves of the first and the second basic cycle. Also disclosed is an electrical heating apparatus which embodies this method.

REFERENCES:
patent: 4871961 (1989-10-01), Kersten et al.
patent: 5390071 (1995-02-01), Kersten et al.

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