Abstract
The purpose of this paper is to explain the constant power characteristic of the constant power type operating circuit of the high pressure mercury arc lamp on the basis of the waveform analysis, and to investigate the behavior of the higher harmonics to elucidate their generation in the nonlinear load. Rated voltage of sinusoidal waveform is applied to the input terminal of the operating circuit. As thee input voltage is varied after steady state, the waveforms are analyzed. The experiments and their analysis are conducted in the following way. And the differences from other operating circuit are indicated.
(1) The waveform of the voltage and current with distorted form for each element of the operating circuit is analyzed, and the impedance for each harmonic component is calculated. (2) From the results of the waveform analysis mentioned above (1), vector diagrams of the voltage and current for each harmonic component of the operating circuit are elaborated. (3) From the results of the waveform analysis mentioned above (1), equivalent circuits for each harmonic component of the operating circuit are elaborated. (4) The consumption power for the operating circuit are calculated to make sure it is constant, and its reason is explained.
