传统的高压钠灯配备的是电感式镇流器，其体积大，本身功耗大、功率因数低、调光困难等。
Traditional ballast components of inductance ballast has some disadvantages which include large volume, high self consumption, low power factor and difficult to adjust.
该焊机由于采用了中频逆变技术，使其效率和功率因数都有较大幅度的提高，不但减小了体积，减轻了重量，而且具有比传统TIG焊机更精密的控制、调节性能等。
Compared with the conventional TIG welding machine, this new inverter proves to have much higher efficiency and power factor, less volume and weight, and especially, more precise parameter control.
近年来，以软开关为特征的逆变电阻焊电源更是以其体积小、重量轻、开关损耗少、功率因数高而备受重视。
In the past years, Inverter resistance welding power source with soft-switching technology has smaller volume, lower quality, higher efficiency.
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