Open-phase prevention power supply of frequency converter

• Main Authors: WANG LANQING, JIN XINRU, CAI XIAOFENG, FAN JIA, SHI ZHANGJIN, DU XINYANG, YANG HUANHONG, FANG LINGLI, NI YING, ZHU ZHENHUA, ZHANG WENBO
• Format: Patent
• Language: Chinese; English
• Published: 10.11.2023
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION

The invention provides a frequency converter default phase prevention power supply, which comprises a first three-phase rectifier bridge, a second three-phase rectifier bridge, a frequency converter control part, a first smoothing part and a second smoothing part, and is characterized in that the output ends of the first three-phase rectifier bridge and the second three-phase rectifier bridge are respectively connected to a first direct current bus and a second direct current bus; the frequency converter control part is connected with an external load; the first wave smoothing part comprises a first wave smoothing capacitor, a first charging diode and a second wave smoothing capacitor which are connected in sequence, and the second wave smoothing part comprises a third wave smoothing capacitor, a second charging diode and a fourth wave smoothing capacitor which are connected in sequence. According to the open-phase prevention power supply of the frequency converter, any three phases of two groups of alternati