Inverter with a load circuit containing a series oscillating cir

Details Inverter with a load circuit containing a series oscillating cir Inverter with a load circuit containing a series oscillating cir

1983-12-15

1985-10-15

Dixon, Harold

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Plural periodic switches or multiple contact periodic switch

315207, 315209R, 315244, 315DIG7, H05B 3702

Patent

active

045477060

ABSTRACT:
In an inverter controlled with a firing unit connected to switches and defining an operating frequency, a resonant frequency of a series oscillating circuit of the inverter connected to one of the switches is placed below this operating frequency. Given this operating situation, a short of the d.c. voltage source is impossible. Given, for example, unfavorable component tolerances, however, the operating frequency can be moved close to the resonant frequency and cause impermissibly high voltages at the components. Such a voltage rise is limited according to the invention by means of a voltage-dependent resistor. It preferably lies in series with a capacitor and takes care of a voltage-dependent shift of the resonant frequency.

REFERENCES:
patent: 4253043 (1981-02-01), Chermin et al.
patent: 4291254 (1981-09-01), Arlt
patent: 4406976 (1983-09-01), Wisbey et al.

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