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Constant current source for high voltage magnetic switch resetting

A technology of constant current source and magnetic switch, applied in instruments, control/regulating systems, adjusting electrical variables, etc., can solve the problem of lack of high-voltage isolation circuits in constant current sources, and achieve the effect of ensuring safety

Active Publication Date: 2013-04-17
HUAZHONG UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

[0005] The present invention provides a constant current source for resetting a high-voltage magnetic switch, which uses a high-frequency filter circuit and a high-frequency transformer to filter and isolate high-voltage pulses coupled in from an output terminal, thereby solving the problem that the existing constant-current source lacks a high-voltage isolation circuit. For high voltage pulse occasions

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  • Constant current source for high voltage magnetic switch resetting

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] Such as figure 1 As shown, the embodiment of the present invention includes a full-bridge inverter 1 , a resonant circuit 2 , a rectifier bridge 3 , a high-frequency filter circuit 4 , a feedback circuit 5 , and a control circuit 6 .

[0025] The full-bridge inverter 1 is composed of the first MOS field effect transistor 7 and the second MOS field effect transistor 8 connected in series, the third MOS field effect transistor 9 and the fourth MOS field effect transistor 10 connected in parallel after being connected in parallel, the full bridge inverter The input terminal inputs 520V DC voltage rectified and filtered by 380V AC voltage; in this embodiment, the four MOS field effect transistors are SIHP12N60E from Vishay Company of the United States. The withstand voltage value of the switching device is 650V, and the gate driving voltage is 20V. ...

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Abstract

A constant current source for high voltage magnetic switch resetting belongs to the technical field of power and resolves the problem that the existing constant current source lacks a high voltage isolation circuit. The constant current source is used for high voltage pulse occasions. The constant current source comprises a full bridge inverter, a resonant circuit, a rectifying bridge, a high frequency filter circuit, a feedback circuit and a control circuit. The constant current source utilizes a metal oxide semiconductor (MOS) field effect tube which works in zero current state to enable input energy to be transmitted to a series resonant circuit in lossless mode, and is capable of adjusting size of output current by adjusting period of the MOS field effect tube to output characteristics with the constant current source without providing an extra steady resistor at the output end. The constant current source adopts a high frequency filter circuit, a filter capacitor, an isolation diode and a catching diode, stops effect of high voltage pulse coupled in a resetting circuit of a pulse power supply magnetic switch or a transformer and ensures safety.

Description

technical field [0001] The invention belongs to power electronics technology, and in particular relates to a constant current source for resetting a high-voltage magnetic switch, which is suitable for providing reset current for a magnetic switch or a transformer in a pulse power supply. Background technique [0002] In order to be able to output high-voltage pulses of tens of thousands of volts and form a stable and fast pulse glow discharge in the discharge cavity of the excimer laser, the pulse power supply of the excimer laser generally uses a magnetic switch to compress the low-voltage pulse, and then passes through a pulse transformer to compress the voltage pulse. Do a boost. Among them, in order to control the saturation time of the magnetic switch or the saturable pulse transformer and improve the energy transfer efficiency, it is generally necessary to couple a constant current source to provide a DC bias current to reset it. Since both the magnetic switch and the...

Claims

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Application Information

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IPC IPC(8): G05F1/56
Inventor 胡耀文左都罗王新兵陆培祥徐勇跃胡守岩方明杨蔓
Owner HUAZHONG UNIV OF SCI & TECH
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