Passive equalizing soft switching circuit of high-frequency power electronic device with n serial diodes
A high-frequency power and electronic switch technology, applied in the direction of high-efficiency power electronic conversion, electrical components, instruments, etc., can solve the problems of inability to form soft switches and insufficient independence, and achieve the effect of reducing volume and reducing loss
Inactive Publication Date: 2012-10-31
汪槱生
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Problems solved by technology
Individual passive circuits need to use the voltage drop on the load to achieve voltage equalization. It is not independent enough to be affected by the load, and it cannot form a soft switching effect.
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[0014] Below in conjunction with accompanying drawing, the present invention is described in further detail:
[0015] refer to figure 1 , the passive voltage equalizing soft switch circuit of n-tube series high-frequency power electronic devices of the present invention, comprising n high-frequency power electronic switches K1, K2...Kn connected in series, n≥1, DC power supply Ud, load R And inductance L, anti-parallel diode D is connected at both ends of load R, capacitor C is connected in parallel at both ends of DC power supply Ud, and a series circuit composed of capacitor C1 and diode D1 is connected in parallel at both ends of each high-frequency power electronic switch. The two ends of the diode D1 of the series circuit of the nth high-frequency power electronic switch are connected in parallel to the energy feedback circuit composed of the capacitor C2 and the primary coil T1 of the transformer T in series, and the capacitor C1 and the diode D1 of the other adjacent se...
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The invention discloses a passive equalizing soft switching circuit of a high-frequency power electronic device with n serial diodes, which mainly comprises n high-frequency power electronic switches connected in series, a direct current power supply Ud, a load R and an inductor L, wherein the n is not less than 1; two ends of the load R are connected in anti-parallel with a diode D; two ends of each high-frequency power electronic switch are connected in parallel with a serial circuit formed by a capacitor C1 and a diode D1; two ends of the diode D1 of the serial circuit of the n high-frequency power electronic switch are connected in parallel with an energy feedback circuit formed by connecting a capacitor C2 in series with the primary winding T1 of a transformer T1; a diode D4 is respectively connected among the connection points of the capacitor C1 and the diode D1 of other adjacent serial circuits; and the energy is released by the secondary winding T2 of the transformer T, a diode D2, a diode D3, a capacitor C3 and an inductor L1. By the invention, the soft connection and soft disconnection of the n high-frequency power electronic switches can be achieved, the switch consumption is decreased, and the passive equalization of the n high-frequency power electronic switches can be realized.
Description
technical field [0001] The invention relates to a passive voltage equalizing soft switch circuit, especially a passive voltage equalizing soft switch circuit of n-tube series high-frequency power electronic devices Background technique [0002] When n-tube high-frequency power electronic devices are connected in series, a circuit that can dynamically equalize the voltage of each tube is required. No matter single-tube operation or multi-tube series operation at high frequency and high voltage, a soft switching circuit that can reduce dynamic switching loss is required. The existing series circuits of multi-tube high-frequency electronic devices are either active or achieved by means of energy consumption. Individual passive circuits need to use the voltage drop on the load to achieve voltage equalization. It is not independent enough to be affected by the load, and it cannot form a soft switching function. Invention content: [0003] The technical problem to be solved by...
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IPC IPC(8): H02M3/24
CPCY02B70/1491Y02B70/10
Inventor 汪槱生
Owner 汪槱生