Comfortable and convenient operation, assembly thermal overload protection device and multi-file electronic speed constant power switch ensure high motor efficiency and durability.
操作舒适方便，装配过载过热保护装置，多档电子调速恒功开关，保证马达的高效率和耐用性。
In power supply, electronic device works in soft switch condition, so the entire efficiency to be very high.
电源中的电力电子器件工作在开关状态，使整机效率很高。
The principle of in frequency converter using large high-voltage power electronic device IGBT was discussed. And the cause of fault was analyzed as well as the lesson should be learned.
叙述了大功率高压电力电子器件IGBT变频传动装置整流器系统的原理，着重分析了故障原因及应吸取的教训。
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