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Rectifier circuit requirements for intermediate frequency power supply

Release time：

2023-06-07

source：

network

The load of the rectifier circuit of the intermediate frequency power supply is the inverter, and the output active power of the inverter is provided by the rectifier circuit, and the DC output voltage of the rectifier circuit is required to be continuously smooth and adjustable (0-513v) within the specified range. If the load of the power supply varies greatly, the rectifier circuit should automatically limit the output voltage. Usually, the current and voltage signals are taken out at the load end to change the rectifier phase shift control Angle to complete the cut-off and voltage cut-off.

It is required that the rectifier circuit should protect the system from overvoltage and overcurrent, and adopt the phase shift control Angle =150 degrees to make the DC output negative pressure form an active inverter. Dc reactor is an important condition of active inverter, and most of the medium frequency power supply uses three-phase full control bridge rectifier circuit. Because its output voltage regulation range is large and the phase shift control Angle is small, it is conducive to the automatic regulation of the system, and its output voltage pulsation frequency is high, which can reduce the burden of DC filtering.

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