CN208337416U - A kind of push-pull ortho-exciting Switching Power Supply for electric vehicle - Google Patents
A kind of push-pull ortho-exciting Switching Power Supply for electric vehicle Download PDFInfo
- Publication number
- CN208337416U CN208337416U CN201821098076.2U CN201821098076U CN208337416U CN 208337416 U CN208337416 U CN 208337416U CN 201821098076 U CN201821098076 U CN 201821098076U CN 208337416 U CN208337416 U CN 208337416U
- Authority
- CN
- China
- Prior art keywords
- rectifier diode
- output
- primary side
- push
- direct
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model provides a kind of push-pull ortho-exciting Switching Power Supply for electric vehicle, including sequentially connected direct-current input power supplying, transformer, rectification circuit and output filter circuit, the transformer includes corresponding primary and secondary side, the primary side includes the first primary side and the second primary side connecting respectively with the direct-current input power supplying, second switch is equipped between first primary side and the negative pole end of the direct-current input power supplying, first switch tube is equipped between second primary side and the positive terminal of the direct-current input power supplying, a capacitor is connected between the first switch tube and the second switch, secondary side is connected to the rectification circuit.The utility model overcomes push-pull converter and positive converter disadvantage, and higher efficiency is obtained in the application of low-voltage, high-current.
Description
Technical field
The utility model belongs to electric vehicle engineering field, and in particular to a kind of push-pull ortho-exciting switch electricity for electric vehicle
Source.
Background technique
In electric car double source power-assisted steering control system, when the B grade electrical circuit of vehicle occurs abnormal, the boosting of isolation
24V is transformed to 540V power supply by Switching Power Supply, keeps the sustainable work 30S of power-assisted steering control system.
Currently, the topology of the boosted switch power supply of isolation is frequently with traditional push-pull converter, forward converter, two kinds of electricity
Road topology respectively has respective advantage and disadvantage, all has certain limitation:
Leakage inductance energy causes high due to voltage spikes, the electricity of receiving on switching tube when push-pull converter power switch tube turns off
Compression is high；The magnetic core DC magnetic bias phenomena of transformer to the consistency of main power transformer, driving circuit pulse width one
Cause property proposes higher requirement.
There is magnetic reset in forward converter, therefore have certain limit value condition to duty ratio.
Utility model content
The purpose of the utility model is to provide a kind of push-pull ortho-exciting Switching Power Supply for electric vehicle, overcome push-pull converter and
Positive converter disadvantage, obtains higher efficiency in the application of low-voltage, high-current.
The utility model provides the following technical solution:
A kind of push-pull ortho-exciting Switching Power Supply for electric vehicle, including sequentially connected direct-current input power supplying, transformer, rectification
Circuit and output filter circuit, the transformer include corresponding primary and secondary side, the primary side include respectively with it is described straight
The first primary side and the second primary side for flowing input power connection, between first primary side and the negative pole end of the direct-current input power supplying
Equipped with second switch, first switch tube is equipped between second primary side and the positive terminal of the direct-current input power supplying, it is described
A capacitor is connected between first switch tube and the second switch, secondary side is connected to the rectification circuit.
Preferably, the rectification circuit be full bridge rectifier, the full bridge rectifier include the first rectifier diode,
Second rectifier diode, third rectifier diode and the 4th rectifier diode, first rectifier diode is respectively with described
Two rectifier diodes are connected with the 4th rectifier diode, and the third rectifier diode rectifies two poles with described second respectively
Pipe is connected with the 4th rectifier diode, and the pair side is connected to two poles of second rectifier diode and the 4th rectification
Between pipe.
Preferably, the output filter circuit includes output inductor, output filter capacitor and output resistance, described defeated
Filter capacitor is in parallel with the output resistance out, the output inductor and the output filter capacitor and the output resistance
Series connection, the output inductor are connected with the rectification circuit, and the output filter capacitor is in parallel with the rectification circuit.
Preferably, output inductor one end connection rectifies two poles with second rectifier diode and the third
Between pipe, the other end of the output inductor is connected between the output filter capacitor and the output resistance.
The beneficial effects of the utility model are: power supply has recommending with normal shock by a lossless element-clamping capacitance
The shortcomings that being combined together to machine, while the advantages of two kinds of converters of reservation, overcoming them: the shutdown due to voltage spikes of switching tube obtains
Voltage stress to inhibition, switching tube reduces；The two-way magnetization of the magnetic core of transformer, bias phenomenon are inhibited, and the one of transformer
Cause property requires to reduce；Higher efficiency is obtained in the application of low-voltage, high-current, becomes the more advantageous electricity of the occasion
Flow topological form.
Detailed description of the invention
Attached drawing is used to provide a further understanding of the present invention, and constitutes part of specification, practical with this
Novel embodiment is used to explain the utility model together, does not constitute limitations of the present invention.In the accompanying drawings:
Fig. 1 is the utility model principle structural schematic diagram；
In the figure, it is marked as Uin: power input voltage；Q1: first switch tube；Q2: second switch；C1: capacitor；T1-
Lp1: the first primary side；T1-Lp2: the second primary side；T1-Lp: secondary side；D1: the first rectifier diode；D2: the second rectifier diode；
D3: third rectifier diode；D4: the four rectifier diode；L1: output inductor；C3: output filter capacitor；R1: output electricity
Resistance.
Specific embodiment
As shown in Figure 1, a kind of push-pull ortho-exciting Switching Power Supply for electric vehicle, including sequentially connected direct-current input power supplying,
Transformer T1, rectification circuit and output filter circuit, transformer T1 include corresponding primary and secondary side T1-Lp, and primary side includes
The the first primary side T1-Lp1 and the second primary side T1-Lp2 connecting respectively with direct-current input power supplying, the first primary side T1-Lp1 and direct current are defeated
Enter and be equipped with second switch Q2 between the negative pole end of power supply, is set between the second primary side T1-Lp2 and the positive terminal of direct-current input power supplying
There is first switch tube Q1, capacitor a C1, secondary side T1-Lp is connected between first switch tube Q1 and second switch Q2 and is connected to whole
Current circuit.Rectification circuit is full bridge rectifier, and full bridge rectifier includes the first rectifier diode D1, the second rectifier diode
D2, third rectifier diode D3 and the 4th rectifier diode D4, the first rectifier diode D1 respectively with the second rectifier diode D2
Connected with the 4th rectifier diode D4, third rectifier diode D3 respectively with the second rectifier diode D2 and the 4th rectifier diode
D4 connection, secondary side T1-Lp are connected between the second rectifier diode D2 and the 4th rectifier diode D4.Output filter circuit includes
Output inductor L1, output filter capacitor C3 and output resistance R1, output filter capacitor C3 is in parallel with output resistance R1, output
Filter inductance L1 holds with output filtered electrical C3 and output resistance R1 connects, and output filter capacitor C3 is in parallel with rectification circuit.Output
Between the connection of the one end filter inductance L1 and the second rectifier diode D2 and third rectifier diode D3, output inductor L1's is another
One end is connected between output filter capacitor C3 and output resistance R1.
As shown in Figure 1, a kind of push-pull ortho-exciting Switching Power Supply for electric vehicle is connected based on foregoing circuit, so that entire circuit
Working principle and effect are totally different from push-pull circuit, thus the shortcomings that overcoming push-pull converter and forward converter.
Specifically, input power of the 24V battery of electric car as the circuit, primary side 2 switching tubes Q1, Q2 are used
The work of high frequency fixed duty cycle, i.e. Q1 and Q2 alternate conduction, and there is the dead zone of very little to be delayed when their conducting alternatings, avoid electricity
Source is led directly to, by the boost or depressurization of high frequency transformer T1, then by the full bridge rectifier of pair side T1-Lp (D1, D2, D3,
D4), output inductor L1, capacitor C3 just form steady dc voltage 540V output.Since entire circuit only has 2 switches
Pipe, and with fixed duty cycle alternate conduction, this allows for the control circuit very simple of circuit.
When circuit stable state, whether which conducting of Q1 or Q2, C1 is a winding with transformer primary side
In parallel, so the always left negative right side of voltage on C1 is just, and it is approximately equal to the voltage Uin of input DC power.Power input voltage
Uin, capacitor C1 both end voltage Uc1, Q1 and Q2 switching tube both ends voltage Udq1 and Udq2 constitute a circuit, by kirchhoff
Known to voltage law:
Uin+Uc1=Udq1+Udq2=2Uin
In formula, Udq1 and Udq2 are respectively Q1 or Q2 hourglass source electrode pressure drop.Because switching tube hourglass source electrode pressure drop Udq1, Udq2 >=
0 (it is reverse-biased, the diode current flow of reverse parallel connection at this time, drain-source voltage that null situation, which appears in hourglass source electrode and bears voltage,
It is clamped at 0), therefore the maximum voltage stress that switching tube is born during the work time is 2Uin, therefore, C1, which is added, to be eliminated
The voltage overshoot phenomenon of switching tube.Simultaneously as the end voltage of C1 has floating property, if selecting suitable clamping capacitance
Value, that is, can guarantee that transformer flux has the bi-directional symmetrical magnetic of equal Flux consumption and magnetic core in two half periods of same period
Change, excitation current and magnetic flux is made to return to starting point in end cycle, the phenomenon that non DC bias, the introducing of capacitor C1 is inhibited
The due to voltage spikes of switching tube, while also inhibiting the intrinsic DC magnetic bias phenomena of push-pull converter.
The shortcomings that Push-pull Forward Converter maintains the advantages of push-pull circuit and forward converter, overcomes the two, comprising: suppression
The magnetic core bias of transformer processed；The two-way magnetization of magnetic core of transformer；The advantages that inhibiting the shutdown due to voltage spikes of switching tube, in electronic vapour
Higher efficiency is obtained in the application of this low-voltage, high-current of vehicle 24V power-supply system, it is more advantageous to become the occasion
Circuit topology form.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, although ginseng
The utility model is described in detail according to previous embodiment, it for those skilled in the art, still can be with
It modifies the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.It is all
Within the spirit and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in practical
Within novel protection scope.
Claims (4)
1. a kind of push-pull ortho-exciting Switching Power Supply for electric vehicle, which is characterized in that including sequentially connected direct-current input power supplying, change
Depressor, rectification circuit and output filter circuit, the transformer include corresponding primary and secondary side, and the primary side includes difference
The first primary side and the second primary side connecting with the direct-current input power supplying, first primary side and the direct-current input power supplying are born
It is equipped with second switch between extreme, first switch is equipped between second primary side and the positive terminal of the direct-current input power supplying
Pipe, is connected with a capacitor, secondary side is connected to the rectification circuit between the first switch tube and the second switch.
2. a kind of push-pull ortho-exciting Switching Power Supply for electric vehicle according to claim 1, which is characterized in that the rectified current
Road is full bridge rectifier, and the full bridge rectifier includes the first rectifier diode, the second rectifier diode, third rectification two
Pole pipe and the 4th rectifier diode, first rectifier diode are rectified with second rectifier diode and the described 4th respectively
Diode connection, the third rectifier diode connect with second rectifier diode and the 4th rectifier diode respectively
It connects, the pair side is connected between second rectifier diode and the 4th rectifier diode.
3. a kind of push-pull ortho-exciting Switching Power Supply for electric vehicle according to claim 2, which is characterized in that the output filter
Wave circuit includes output inductor, output filter capacitor and output resistance, the output filter capacitor and the output resistance
Parallel connection, the output inductor are connected with the output filter capacitor and the output resistance, the output inductor with
The rectification circuit series connection, the output filter capacitor are in parallel with the rectification circuit.
4. a kind of push-pull ortho-exciting Switching Power Supply for electric vehicle according to claim 3, which is characterized in that the output filter
Between the connection of wave inductance one end and second rectifier diode and the third rectifier diode, the output inductor
The other end is connected between the output filter capacitor and the output resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821098076.2U CN208337416U (en) | 2018-07-11 | 2018-07-11 | A kind of push-pull ortho-exciting Switching Power Supply for electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821098076.2U CN208337416U (en) | 2018-07-11 | 2018-07-11 | A kind of push-pull ortho-exciting Switching Power Supply for electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208337416U true CN208337416U (en) | 2019-01-04 |
Family
ID=64786673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821098076.2U Expired - Fee Related CN208337416U (en) | 2018-07-11 | 2018-07-11 | A kind of push-pull ortho-exciting Switching Power Supply for electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208337416U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108696147A (en) * | 2018-07-11 | 2018-10-23 | 耐力斯默通动力技术（苏州）有限公司 | A kind of push-pull ortho-exciting Switching Power Supply for electric vehicle |
-
2018
- 2018-07-11 CN CN201821098076.2U patent/CN208337416U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108696147A (en) * | 2018-07-11 | 2018-10-23 | 耐力斯默通动力技术（苏州）有限公司 | A kind of push-pull ortho-exciting Switching Power Supply for electric vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2018107599A1 (en) | Pfc forward full bridge-based intelligent sine wave voltage conversion circuit | |
| CN100379132C (en) | Soft-switch PWM interleaving shunt-wound two-transistor forward power converter | |
| CN205490156U (en) | Quasi -resonance is turned over and is swashed switching power supply | |
| CN104009645B (en) | A kind of series and parallel combined dual output LLC resonant converter | |
| CN105281576A (en) | Quasi-resonant half-bridge converter and control method thereof | |
| CN105553272A (en) | Straight-through prevention half-bridge LLC resonance converter | |
| CN103904896A (en) | Voltage doubling high frequency rectifying isolated converter based on hybrid rectifying bridge arm | |
| CN105245113A (en) | Anti-conduction-through soft switch push-pull LLC resonance converter | |
| CN103441680A (en) | Soft-switching full-bridge direct-current converter capable of reducing current-circulation loss | |
| CN103378739A (en) | Switching power supply apparatus | |
| CN109245539A (en) | A kind of voltage superposition formula booster circuit | |
| CN110086354A (en) | Single-phase double push-pull booster circuit and step-up method based on silicon carbide MOSFET | |
| CN103887987A (en) | Multiple voltage-multiplying high-gain high-frequency rectification isolation converter based on switched capacitor | |
| CN103904923A (en) | High-gain high-frequency boosting and rectifying isolated converter based on hybrid rectifying bridge arm and switch capacitors | |
| CN104638931B (en) | The forward-flyback converter of symmetrical RCD clamps | |
| CN102208872B (en) | Forward DC (direct current) converters sharing RCD (resistor-capacitor diode) magnetic reset branch circuit | |
| CN101557172B (en) | Input interleaved series forward DC-DC converter | |
| CN208337416U (en) | A kind of push-pull ortho-exciting Switching Power Supply for electric vehicle | |
| CN106026714A (en) | Single-stage bipolar gain isolated type convertor | |
| CN106300990B (en) | The active clamped normal shock DC/DC converter topology circuits of dual transformer structure | |
| CN201312262Y (en) | High-frequency switch power supply with higher conversion efficiency | |
| CN100364219C (en) | Main circuit of interleaving inverse excitation type converter with clamping capacitance | |
| US7944713B2 (en) | Electric power conversion circuit having transfer gain variable by pulse-width modulation | |
| CN108696147A (en) | A kind of push-pull ortho-exciting Switching Power Supply for electric vehicle | |
| CN106329943A (en) | Low-voltage DC boost conversion and control circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190104 Termination date: 20200711 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |