倍频式感应加热电源负载输出频率为功率开关管工作频率的二倍，且功率开关器件工作时具有软开关特性，在需要高频应用的场合很有意义。
Since its output frequency is as twice as the device frequency and it has the merit of soft-switching characteristic, multiple-frequency induction heater is widely used in high frequency application.
为提高系统高频动态特性，提出了低偏置电流工作方式。
The low-bias current control method is proposed in order to improve system high frequency dynamic performance.
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