Translated Title
New control strategy of electronic ballast for low-wattage MH lamps
Translated Abstract
A novel control strategy to match the dynamic characteristics of MH lamps is proposed in the paper, the required open-circuit voltage for MH lamps stand-up is obtained and the current control in stand-up process and the constant power control in steady operation are realized. Because of ZCS (Zero-current-switching) operation, the circuit can work in high switching frequency while achieving high efficiency. A differential amplifier is used to sample the lamp voltage and current signal, and to realize the common ground of the floating lamp signal and the drive circuit of half-bridge inverter. The circuit operation and control method are detailed and the main parameters are calculated. The experimental measurements are used to verify the theoretical prediction and analytical discussion.
Translated Keyword
control strategy
electronic ballast
MH lamps
zero-current
Access Number
WF:perioarticaldgdn201002004
