CN204669224U - A kind of high-voltage switch power supply - Google Patents

Abstract

The utility model discloses a kind of high-voltage switch power supply, comprise the surge suppression modules, rectification filtering module, full bridge inverter, high voltage converter, the output filtering module that are linked in sequence, the signal input part of described surge suppression modules is connected with AC power, and described output filtering module one output is connected with load.The utility model reaches based on the full bridge structure of control chip that the precision of voltage regulation is high, dynamic response fast, effect low in energy consumption.

Description

A high voltage switching power supply

technical field

The utility model relates to a high-frequency device, in particular to a high-voltage switching power supply.

Background technique

With the development and innovation of power electronics technology, switching power supply technology is also constantly innovating. The characteristics of small size, light weight and high efficiency of switching power supply make almost all electronic devices use switching power supply.

However, the current switching power supply in high-frequency surgical equipment is not intelligent enough, and the voltage output range is narrow, and the adjustment of the output voltage is mostly manual adjustment.

Contents of the invention

The utility model aims at the deficiencies of the above-mentioned prior art, and proposes a high-voltage switching power supply capable of realizing intelligent voltage regulation in high-frequency surgical equipment.

The utility model is realized through the following technical solutions: A high-voltage switching power supply, including a sequentially connected surge suppression module, a rectifier filter circuit, a full-bridge inverter circuit, a high-voltage frequency converter, and an output filter circuit. The signal input end of the module is connected with the AC power supply, and the first output end of the output filtering circuit is connected with the load.

Further, the other output end of the output filter circuit is connected to the control chip through the output voltage control module.

Further, the high-voltage frequency converter is also connected to an overcurrent protection circuit, which controls the isolation drive circuit through a control chip, and the signal output terminal of the isolation drive circuit is connected to the full-bridge inverter circuit.

Further, the output voltage control module can control the output voltage within the range of 0-160V.

Compared with the prior art, the utility model has the following beneficial effects:

1. The utility model is based on the full bridge structure of the control chip to achieve the effects of high voltage stabilization accuracy, fast dynamic response and low power consumption.

2. The utility model can improve the reliability of switching power supply and reduce power consumption.

Description of drawings

Fig. 1 is a block diagram of the circuit structure of the utility model high-voltage switching power supply.

Fig. 2 is a schematic circuit diagram of the output voltage control module of the high-voltage switching power supply of the present invention.

Among them: 1-surge suppression module, 2-rectifier filter circuit, 3-full bridge inverter circuit, 4-high voltage inverter, 5-output filter circuit, 6-overcurrent protection circuit, 7-control chip, 8-isolation Drive circuit, 9-output voltage control module.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

A high-voltage switching power supply, comprising a sequentially connected surge suppression module 1, a rectification filter circuit 2, a full-bridge inverter circuit 3, a high-voltage frequency converter 4, and an output filter circuit 5, the signal input terminal of the surge suppression module 1 It is connected with the AC power supply, and the first output terminal of the output filter circuit 5 is connected with the load.

Further, the other output end of the output filter circuit 5 is connected to the control chip 7 through the output voltage control module 9 .

Further, the high-voltage frequency converter 4 is also connected to the overcurrent protection circuit 6, the overcurrent protection circuit 6 controls the isolation drive circuit 8 through the control chip 7, and the signal output terminal of the isolation drive circuit 8 is connected to the full bridge inverter circuit 3 .

Further, the output voltage control module 9 can control the output voltage within the range of 0-160V.

The working process of the present utility model is as follows:

Turn on the high-frequency surgical equipment, connect the high-voltage switching power supply to the mains, and the mains will be converted into direct current through the surge suppression module 1 to the rectification and filtering circuit 2, and the direct current is supplied to the full-bridge inverter circuit 3, and the driving signal generated by the control chip 7 (UC3825) The isolated driving circuit 8 is sent to the full-bridge inverter circuit 3 to make the full-bridge inverter circuit 3 work normally, and the high-frequency alternating current generated by the full-bridge inverter circuit 3 passes through the high-frequency transformer 4 to the output filter circuit 5 to become direct current. The high-frequency device adjusts the output voltage through the output voltage control module 9 according to the size of the gear position and the change of the load. The control chip 7 achieves the effect of voltage stabilization by sampling and comparing the output voltage, and samples the output current of the full-bridge inverter circuit 3 , send the sampled signal to the overcurrent protection circuit, when the output current is greater than a certain value, it will trigger the overcurrent protection function of the control chip 7 (UC3825), stop generating the driving signal, and protect the circuit.

Claims (4)

1. a high-voltage switch power supply, it is characterized in that: comprise the surge suppression modules, current rectifying and wave filtering circuit, full bridge inverter, high voltage converter, the output filter circuit that are linked in sequence, the signal input part of described surge suppression modules is connected with AC power, and described output filter circuit one output is connected with load.

2. high-voltage switch power supply according to claim 1, is characterized in that: another output of described output filter circuit is connected with control chip by output voltage control module.

3. high-voltage switch power supply according to claim 1; it is characterized in that: described high voltage converter is also connected with current foldback circuit; current foldback circuit controls isolated drive circuit by control chip, and the signal output part of isolated drive circuit is connected with full bridge inverter.

4. high-voltage switch power supply according to claim 2, is characterized in that: described output voltage control module can by output voltage control within the scope of 0-160V.