A Control Method for Realizing Low Voltage Switch Stress

A control method and switching stress technology, applied in control/regulating systems, electrical components, regulating electrical variables, etc., can solve the problems of reduced energy conversion efficiency, high voltage stress of switching devices, electromagnetic interference, etc., to reduce conduction losses and switching losses, improve operating efficiency, and reduce voltage stress

Active Publication Date: 2018-11-02
张乙乙 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At this time, the conversion process of electric energy is actually changed from the original DC-DC to DC-AC-AC-DC, and the energy conversion efficiency of the whole system is reduced.
[0006] The second is to use coupled inductors, but the structure of coupled inductors is complex, which is not conducive to industrial processing, it is difficult to ensure the consistency of the circuit, and it will cause excessive voltage stress of switchi

Method used

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  • A Control Method for Realizing Low Voltage Switch Stress
  • A Control Method for Realizing Low Voltage Switch Stress
  • A Control Method for Realizing Low Voltage Switch Stress

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[0029] Depend on image 3 It can be seen that the low voltage switching stress booster circuit of the present invention includes an input voltage Vin, switching elements S1 and S2, diodes D1 and D2, an inductor L, an input capacitor C1, an intermediate capacitor C2 and an output capacitor Co. Due to the characteristics of the switching devices, the switching elements S1 and S2 have parasitic capacitances C, respectively. S1 , C S2 .

[0030] combined with image 3The structure of the present invention is described in detail, and the specific connection relationship is as follows: the positive pole of the input voltage Vin is connected to one end of the inductor L and the negative end of the input capacitor C1, and the other end of the inductor L is connected to the collector of the switching element S1 and the anode of the diode D1, The emitter of the switching element S1 is connected to the collector of the switching element S2, the emitter of the switching element S2 is c...

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Abstract

The invention discloses a control method for realizing the low-voltage switch stress of a boosted circuit. The boosted circuit comprises an input power supply, switching elements S1 and S2, diodes D1 and D2, an inductor L, an input capacitor C1, an intermediate capacitor C2, and an output capacitor Co. The input power supply generates an input voltage Vin; and the switching elements S1 and S2 are respectively provided with parasitic capacitors CS1 and CS2. According to the control method, turning on and off of the switching elements S1 and S2 are controlled, so that the boost function is realized and the voltage drops between the collectors and emitters of the switching elements S1 and S2 can be substantially reduced based on comparison with the prior art. No energy-consuming element exists in the circuit; and the work efficiency of the converter is improved.

Description

technical field [0001] The invention relates to a control method of a DC-DC converter, in particular to a control method for realizing the low-voltage switch stress of a boost circuit. Background technique [0002] In a solar power generation system or a fuel cell system, since a single solar cell or a single fuel cell provides direct current with a low voltage, it cannot meet the electricity demand of existing electrical equipment, nor can it meet the requirements of grid connection. It is necessary to convert the low-voltage direct current into the actually required high-voltage direct current. Therefore, the boost converter with high gain and stable performance has become a research hotspot, which is of great significance to promote the development of photovoltaic and fuel cell industries. [0003] The most basic boost converter is a single-transistor Boost converter. However, the boost range of this converter is very limited, it is difficult to meet the conversion requi...

Claims

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Application Information

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IPC IPC(8): H02M3/155
Inventor 张乙乙周颖
Owner 张乙乙
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