Voltage doubling rectifying circuit of high-voltage power supply

Abstract

The invention relates to a voltage doubling rectifying circuit of a high-voltage power supply, and the circuit comprises a transformer which comprises a primary coil, a first secondary coil and a second secondary coil, and one end of the first secondary coil is connected with one end of the second secondary coil; the primary coil is used for receiving a high-frequency PWM wave signal after municipal current rectification; the transformer is used for boosting the high-frequency PWM wave signal, outputting a first primary voltage signal through the first secondary coil and outputting a second primary voltage signal through the second secondary coil; the positive voltage-multiplying circuit is connected with the first secondary coil and is used for receiving the first primary voltage signal and outputting a positive voltage-multiplying signal; the negative voltage-multiplying circuit is connected with the second secondary coil and is used for receiving the second primary voltage signal and outputting a negative voltage-multiplying signal; voltage-multiplying signals are output at the output ends of the positive voltage-multiplying circuit and the negative voltage-multiplying circuit, and the voltage-multiplying signals are the sum of the positive voltage-multiplying signals and the negative voltage-multiplying signals; and the load is connected between the output end of the positive voltage-multiplying circuit and the output end of the negative voltage-multiplying circuit to receive the voltage-multiplying signal.

Description

technical field [0001] The application relates to the field of high-voltage power supplies, and in particular, to a voltage-doubling rectifier circuit for high-voltage power supplies. Background technique [0002] In equipment such as X-ray machines and picture tubes, it is often necessary to use high-voltage DC power supply, and the municipal power supply is 220V AC power. Therefore, when forming high-voltage DC power, the 220V AC power needs to be converted into DC power first, and then the DC power is boosted and boosted. For high voltage DC power supply. [0003] The voltage doubler rectifier circuit is a circuit that converts a lower AC voltage into a higher DC voltage, and the output voltage is often several times the input voltage. The voltage is stored on each capacitor, and then the polarities of the capacitors are connected in series and added to obtain a high DC voltage. [0004] However, the voltage doubling rectifier circuit in the prior art can only work unde...

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Problems solved by technology

[0004] However, the voltage doubler rectifier circuit in the prior art can only work under light load conditions, especially the high-order voltage doubler rectifier circuit, its load capacity is low, and the output power will cause a large drop in voltage when the output power is small, resulting in output voltage Unstable, and for some precision equipment and instruments, the unstable output voltage will seriously affect the work of the equipment

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