Switched converter with acoustic switching frequency

摘要

The system has a direct current (dc) voltage clocked at a converter frequency and supplies an operating voltage (UB). An inverter fed by the operating voltage, has output terminals with lamp voltage (UL). A high-pressure discharge lamp connected to the output terminals has one acoustic resonant frequency. The converter frequency is an n-fold multiple of an acoustic resonant frequency, where n is a number other than zero. The acoustic resonance is a longitudinal resonance and n is equal to 2.