Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Soft switching circuit without absorption loss

A soft switching, lossless technology, applied in the direction of electrical components, adjusting electrical variables, high-efficiency power electronic conversion, etc., can solve the problems of high production cost, decreased circuit work efficiency, complex circuit, etc., to improve work efficiency and power saving performance , the number of additional components is small, and the effect of simple circuit structure

Inactive Publication Date: 2004-05-26
钱龙圣 +1
View PDF2 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At the same time, the present invention also solves the technical problems that the soft switching circuit in the prior art requires an additional auxiliary switching circuit, the number of components is large, the circuit is complicated, the production cost is high, and the reliability is poor; or the circuit energy loss is large, resulting in a decrease in the working efficiency of the circuit.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Soft switching circuit without absorption loss
  • Soft switching circuit without absorption loss
  • Soft switching circuit without absorption loss

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: A soft switching circuit without loss absorption, used in BOOST booster circuit, the structure is that the alternating current passes through the bridge BR 1 rectified by the energy storage inductor L 1 Capacitance C 1 The composed circuit is then connected to the switch tube Q, and one end of the switch tube Q is used as the switch cathode, and the diode D 2 , Diode D 3 and diode D 4 A branch formed in series in the same direction, connected in parallel with the freewheeling diode D in the BOOST circuit 1 The two ends; and by the capacitance C 2 and inductance L 2 One end of the series resonant branch is connected to the diode D 1 The anode of the other end is connected to the diode D 3 with diode D 4 between; and between the diode D 2 with diode D 3 A capacitor C is connected between 3 One end of the capacitor C 3 The other end is connected to the cathode end of the switch tube. where the capacitor C 2 with inductance L 2 The resonant half...

Embodiment 2

[0024] Example 2: Diode D 6 and diode D 7 Connected in series in the same direction, diode D 6 The negative end of the diode is connected to the positive end of the input power supply, and the diode D 7 The positive terminal is connected to the negative terminal of the input power supply, and the diode D 6with diode D 7 There is an inductance L between 6 at one end, the inductance L 6 The other end of the diode is connected to D 8 positive electrode and capacitor C 7 One end of the capacitor C 7 The other end of the transformer is connected to the negative potential end when the primary coil of the transformer is excited, and is connected to the switch tube Q 2 The anode of the switch tube Q 2 The cathode is connected to the negative terminal of the input power supply, and then the diode D is forwardly connected in series. 10 Then connect to the positive potential terminal of the primary coil of the transformer when it is excited, the diode D 8 The negative pole of ...

Embodiment 3

[0026] Example 3: Diode D 6 and diode D 7 Connected in series in the same direction, diode D 6 The negative end of the diode is connected to the positive end of the input power supply, and the diode D 7 The positive terminal is connected to the negative terminal of the input power supply, and the diode D 6 with diode D 7 There is an inductance L between 6 at one end, the inductance L 6 The other end of the diode is connected to D 8 positive electrode and capacitor C 7 One end of the capacitor C 7 The other end of the transformer is connected to the negative potential end when the primary coil of the transformer is excited, and is connected to the switch tube Q 2 The anode of the switch tube Q 2 The cathode of the magnetic reset coil is connected to the negative terminal of the input power supply, the positive terminal of the magnetic reset coil (when the primary coil is excited) is connected to the negative terminal of the input power supply, and the negative terminal...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention modifies circuit structure with no absorption loss in existed soft switching as follows. In BOOST boosted circuit, a branch circuit composed of cascaded diode D2, D3 and D4 is connected to two ends of freewheeling diode D1 in BOOST circuit in parallel. One end of resonance branch circuit composed of capacitance C2 and inductance L2 is connected to positive end of diode D1, and the other end of the resonance branch circuit is connected to between diode D3 and D4. One end of capacitance C3 is connected between diode D2 and D3, and the other end is connected to end of cathode of switching tube. If needed, circuit with no absorption loss of positive / negative excited convertor can be added to modified circuit.

Description

technical field [0001] The invention relates to a soft switching circuit, in particular to an improvement on the structure of the existing soft switching non-loss absorbing circuit. When necessary, a lossless absorbing circuit of forward and flyback converters can be added to the circuit to further improve the performance of the circuit. Background technique [0002] Snubber circuits are often used to reduce switching stress on switching elements. Switching stresses include switching losses, current surges and voltage spikes. The main reason for the loss of hard switching is the turn-on and turn-off losses caused by the crossover of voltage and current. When the soft switch is turned on, the current rises from zero, so there is no turn-on loss. When it is turned off, the turn-off loss and voltage spike of the switch are reduced by limiting the rising speed of the voltage. A patent search found that someone had applied for a patent (97103647.0) entitled "Soft Switching Act...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155H02M7/537
CPCY02B70/1491Y02B70/10
Inventor 钱龙圣
Owner 钱龙圣
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com