CN203233322U - Multiplexed output fly-back switching power supply - Google Patents
Multiplexed output fly-back switching power supply Download PDFInfo
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- CN203233322U CN203233322U CN2013202483731U CN201320248373U CN203233322U CN 203233322 U CN203233322 U CN 203233322U CN 2013202483731 U CN2013202483731 U CN 2013202483731U CN 201320248373 U CN201320248373 U CN 201320248373U CN 203233322 U CN203233322 U CN 203233322U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model belongs to the power electronics technology field, and specifically relates to a multiplexed output fly-back switching power supply used for motor control. The multiplexed output fly-back switching power supply comprises a pre-stage protection circuit on a current input end, an EMI filter circuit, a rectification circuit, a synchronous rectification circuit on a current output end and an output filter circuit. The multiplexed output fly-back switching power supply is characterized in that an RCD clamp circuit and a fly-back conversion circuit are connected between the rectification circuit and the synchronous rectification circuit, and a feedback circuit and a control circuit are connected between the current output end and the fly-back conversion circuit. The multiplexed output fly-back switching power supply has the advantages of being small in size, light in weight, high in efficiency, simple in circuit, high in reliability and high in capability of automatically equalizing all the output loads, and is suitable for occasions of medium or low power.
Description
Technical field
The utility model belongs to electric and electronic technical field, is specifically related to a kind of multichannel output inverse-excitation type switch power-supply for Electric Machine Control.
Background technology
In recent years, along with the continuous development of power electronic technology, each application has proposed more and more higher requirement to aspects such as the volume of power supply, weight, efficient.Common D.C. regulated power supply has linear power supply and Switching Power Supply two big classes.Switching Power Supply is compared with linear power supply, has following advantage: 1. efficient height; 2. volume is little, in light weight; 3. voltage stabilized range is wide; 4. performance is flexible, and driving force is strong; 5. the reliability height when switch damages, does not have the high voltage that jeopardizes load yet and occurs.From cost, the cost of Switching Power Supply and linear power supply all is to increase along with the increase of power output, but the two growth rate difference.On a certain power output point, the linear power supply cost will be higher than Switching Power Supply on the contrary, Here it is cost rollback point.Along with switch power technology is constantly developing and innovating, this cost rollback point day by day moves to low power output power end, and this just provides more wide development space for Switching Power Supply.Under the background of building resource-conserving and friendly environment society, Switching Power Supply has become the leading products of stabilized voltage power supply because have safety and environmental protection, energy-efficient and short and small advantage such as frivolous.Traditional Switching Power Supply generally adopts the voltage type PWM technology at present.Current mode PWM is the new technology of rising in recent years, compare with voltage type PWM, current mode PWM Switching Power Supply has better voltage and load regulation, the stability of system and dynamic characteristic are able to obvious improvement, and particularly its inherent current limiting capacity and parallel current-sharing ability can make control circuit simple and reliable.
Summary of the invention
The purpose of this utility model is to provide that a kind of volume is little, in light weight, efficient is high, simple in circuits, multichannel output inverse-excitation type switch power-supply that reliability is high.
The purpose of this utility model realizes by the following technical solutions: this multichannel output inverse-excitation type switch power-supply, the prime protective circuit, EMI filter circuit, the rectification circuit that comprise current input terminal, and the circuit of synchronous rectification of current output terminal, output filter circuit; Be characterized in: between described rectification circuit and circuit of synchronous rectification, also be connected with RCD clamp circuit and inverse-excitation converting circuit, between current output terminal and inverse-excitation converting circuit, also be connected with feedback circuit and control circuit.
Further, described inverse-excitation converting circuit comprises switching tube protective circuit and transformer.
Specifically, described switching tube protective circuit comprises Schottky diode; Described transformer adopting EI40 type magnetic core.
Specifically, described feedback circuit comprises optocoupler H11A1 and the adjustable voltage-stabiliser tube TL431 of three ends.
Specifically, described control circuit comprises current mode PWM controller UC3844 chip.
Specifically, described RCD clamp circuit adopts passive RCD clamp circuit.
The utility model is the multichannel output inverse-excitation type switch power-supply for Electric Machine Control, mainly is made up of main power circuit (RCD clamp circuit and inverse-excitation converting circuit) and control circuit (feedback circuit and control circuit) two parts.Main power circuit adopts single-ended flyback translation circuit structure, and control circuit is selected UC3844 high-performance current type pwm chip for use.The utility model Switching Power Supply power output 52W, can provide simultaneously 12V/0.2A, ± multichannel output signal such as 15V/0.5A, 24V/1A, 5V/2A, wherein 12V/0.2A is the UC3844 chip power supply, ± 15V/0.5A is the IGBT inverter power supply, 24V/1A can be used to be the relay power supply, 5V/2A is most important one tunnel output signal, and it is except being used for voltage stabilizing, and also the digiboard power supply of using for Electric Machine Control provides 5V power supply.
The utlity model has that volume is little, in light weight, efficient is high, simple in circuits, reliability is high and advantages such as ability with each the road output loading of stronger automatic equalization, be suitable for very much the occasion of middle low power, compare with similar Switching Power Supply in the market, the utlity model has following advantage:
(1) adopt the two closed loop tandem structures of voltage feedback and current feedback, output voltage can be stablized well, ripple is little, and voltage regulation and load regulation are all higher.
(2) utilize the adjustable voltage-stabiliser tube TL431 of optocoupler H11A1 and three ends to cooperate control to improve the power supply transient response speed greatly.
(3) designed RCD clamp circuit and switching tube protective circuit well, can eliminate leakage inductance effectively, element can reliablely and stablely be worked.
Description of drawings
Fig. 1 is the circuit module theory structure block diagram of the utility model embodiment.
Fig. 2 is the circuit connection diagram of the utility model embodiment.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
Referring to Fig. 1, present embodiment comprises prime protective circuit, EMI filter circuit, the rectification circuit of current input terminal, and the circuit of synchronous rectification of current output terminal, output filter circuit; As can be seen from Fig. 1, between rectification circuit and circuit of synchronous rectification, also be connected with RCD clamp circuit and inverse-excitation converting circuit, between current output terminal and inverse-excitation converting circuit, also be connected with feedback circuit and control circuit.
Referring to Fig. 2, be the circuit connection diagram of present embodiment, as can be seen from Fig. 2, inverse-excitation converting circuit comprises switching tube protective circuit and transformer, the switching tube protective circuit comprises Schottky diode, transformer adopting EI40 type magnetic core.Comprise the adjustable voltage-stabiliser tube TL431 of optocoupler H11A1 and three ends in the feedback circuit, comprise current mode PWM controller UC3844 chip in the control circuit.The RCD clamp circuit of present embodiment adopts passive RCD clamp circuit.
Operation principle and the process of present embodiment are: current input terminal inserts 220V alternating current Ui, through after the protective circuit, carries out the EMI em filtering, and filter out power inserts the interference of noise and self-noise, and bridge rectifier is the direct voltage about 310V then; Change circuit by the inverse-excitation type main transformer and carry out voltage transformation, main circuit comprises high frequency transformer, passive clamping RCD circuit and power switch pipe; Carry out rectifying and wave-filtering through delivering to back level circuit of synchronous rectification after the Circuit Fault on Secondary Transformer conversion; As it is not obvious to export filter effect, can increase back level filter circuit; When AC-input voltage fluctuates, stable in order to guarantee output, need carry out negative feedback regulates, sample from back level output Uo end, sampled signal is delivered to control circuit, produce the adjustable pulse signal of ratio through links such as sampling, comparison, amplifications and come the control switch pipe to make corresponding adjustment, thereby make output stable.
Claims (7)
1. multichannel output inverse-excitation type switch power-supply comprises prime protective circuit, EMI filter circuit, the rectification circuit of current input terminal, and the circuit of synchronous rectification of current output terminal, output filter circuit; It is characterized in that: between described rectification circuit and circuit of synchronous rectification, also be connected with RCD clamp circuit and inverse-excitation converting circuit, between current output terminal and inverse-excitation converting circuit, also be connected with feedback circuit and control circuit.
2. multichannel according to claim 1 is exported inverse-excitation type switch power-supply, and it is characterized in that: described inverse-excitation converting circuit comprises switching tube protective circuit and transformer.
3. multichannel according to claim 2 is exported inverse-excitation type switch power-supply, and it is characterized in that: described switching tube protective circuit comprises Schottky diode.
4. multichannel output inverse-excitation type switch power-supply according to claim 2 is characterized in that: described transformer adopting EI40 type magnetic core.
5. multichannel according to claim 1 is exported inverse-excitation type switch power-supply, and it is characterized in that: described feedback circuit comprises optocoupler H11A1 and the adjustable voltage-stabiliser tube TL431 of three ends.
6. multichannel according to claim 1 is exported inverse-excitation type switch power-supply, and it is characterized in that: described control circuit comprises current mode PWM controller UC3844 chip.
7. multichannel according to claim 1 is exported inverse-excitation type switch power-supply, and it is characterized in that: described RCD clamp circuit adopts passive RCD clamp circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202483731U CN203233322U (en) | 2013-05-09 | 2013-05-09 | Multiplexed output fly-back switching power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202483731U CN203233322U (en) | 2013-05-09 | 2013-05-09 | Multiplexed output fly-back switching power supply |
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| CN203233322U true CN203233322U (en) | 2013-10-09 |
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| CN2013202483731U Expired - Fee Related CN203233322U (en) | 2013-05-09 | 2013-05-09 | Multiplexed output fly-back switching power supply |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647455A (en) * | 2013-12-30 | 2014-03-19 | 黑龙江大学 | Portable intelligent monitoring power supply and monitoring method |
| CN103944416A (en) * | 2014-05-02 | 2014-07-23 | 张新安 | Multi-output switch direct current voltage stabilizing power source with simple circuit |
| CN104993874A (en) * | 2015-08-10 | 2015-10-21 | 中国人民解放军信息工程大学 | Visible light communication tunnel lamp used in mine pits |
| CN105006960A (en) * | 2015-07-29 | 2015-10-28 | 哈尔滨工业大学 | Low voltage start switch power supply |
| CN108271099A (en) * | 2018-02-08 | 2018-07-10 | 许卫军 | A kind of wall type Bluetooth audio device and its circuit |
| CN110829809A (en) * | 2019-10-13 | 2020-02-21 | 国网山东省电力公司莱芜供电公司 | Harmonic suppression device for switching power supply |
| CN112332670A (en) * | 2020-11-09 | 2021-02-05 | 江门市科通半导体有限公司 | Multiunit multivoltage output flyback converter control circuit |
-
2013
- 2013-05-09 CN CN2013202483731U patent/CN203233322U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647455A (en) * | 2013-12-30 | 2014-03-19 | 黑龙江大学 | Portable intelligent monitoring power supply and monitoring method |
| CN103944416A (en) * | 2014-05-02 | 2014-07-23 | 张新安 | Multi-output switch direct current voltage stabilizing power source with simple circuit |
| CN105006960A (en) * | 2015-07-29 | 2015-10-28 | 哈尔滨工业大学 | Low voltage start switch power supply |
| CN105006960B (en) * | 2015-07-29 | 2017-08-25 | 哈尔滨工业大学 | Low-voltage starting switch power supply |
| CN104993874A (en) * | 2015-08-10 | 2015-10-21 | 中国人民解放军信息工程大学 | Visible light communication tunnel lamp used in mine pits |
| CN108271099A (en) * | 2018-02-08 | 2018-07-10 | 许卫军 | A kind of wall type Bluetooth audio device and its circuit |
| CN110829809A (en) * | 2019-10-13 | 2020-02-21 | 国网山东省电力公司莱芜供电公司 | Harmonic suppression device for switching power supply |
| CN112332670A (en) * | 2020-11-09 | 2021-02-05 | 江门市科通半导体有限公司 | Multiunit multivoltage output flyback converter control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131009 Termination date: 20140509 |