CN202940740U - High-power PWM type switch voltage-stabilized power supply - Google Patents
High-power PWM type switch voltage-stabilized power supply Download PDFInfo
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- CN202940740U CN202940740U CN 201120557478 CN201120557478U CN202940740U CN 202940740 U CN202940740 U CN 202940740U CN 201120557478 CN201120557478 CN 201120557478 CN 201120557478 U CN201120557478 U CN 201120557478U CN 202940740 U CN202940740 U CN 202940740U
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Abstract
The utility model discloses a high-power PWM type switch voltage-stabilized power supply, which comprises an AC input interface, an EMI filter, a surge current control unit, a power frequency rectifier, a current mutual inductance sampler, a half-bridge circuit converter, a high-frequency transformer, a PWM controller, a soft-start circuit, a high-frequency rectification filter circuit and a DC output interface. The high-power PWM type switch voltage-stabilized power supply disclosed by the utility model has the advantages of small size, light weight, stable voltage output, and ability of adapting to a voltage environment with large grid voltage fluctuations and a wide range. Meanwhile, the high-power PWM type switch voltage-stabilized power supply is provided with a surge current control and overheat protection device, thereby being capable of preventing problems such as output short circuit and the like in the production, test and experiment processes, and preventing damages to power supply equipment.
Description
Technical field
The utility model relates to power technique fields, relates in particular to a kind of power-supply device of high power switch stabilized voltage power supply.
Background technology
In motor manufacturing enterprise, be used for the power-supply device that direct-current electric motor performance detects, generally all adopting linear stabilized power supply is its power supply.Because linear stabilized power supply is controlled the output supply power mode for adjusting the pipe tandem type, when large electric current power supply, as the 30A electric current.Large electric current is adjusted pipe carrying heating by making.What is more important, linear stabilized power supply also have a volume large, the Industrial Frequency Transformer that weight is not light.In addition, the efficient of linear stabilized power supply is also very low, only has 30%～40%, and is not energy-conservation.
The utility model content
The technical problem that (one) will solve
The purpose of this utility model is for the deficiencies in the prior art, and a kind of high power switch stabilized power supply device is provided, and energy conversion efficiency can reach more than 85%.
(2) technical scheme
For solving the problems of the technologies described above, the utility model provides a kind of high-power PWM type switching power supply, includes to exchange input interface, electromagnetic interface filter, surge current control unit, frequency rectifier, Current Mutual Inductance sampler, half-bridge circuit converter, high frequency transformer, PWM controller, soft starting circuit, rectifier filter circuit and direct current output interface; Described interchange input interface is connected with the input interface of electromagnetic interface filter, the output interface of described electromagnetic interface filter is connected with the input interface of described surge current control unit, the output interface of described surge current control unit is connected with the AC of described frequency rectifier, and described frequency rectifier converts alternating current to direct current; The DC side of described frequency rectifier is connected with described half-bridge circuit converter, the drive end of described half-bridge circuit converter is connected with the PWM controller, and described half-bridge circuit converter is modulated to the high-frequency alternating electric current through the former limit of described high frequency transformer winding with direct current; Secondary winding output high-frequency alternating electric current at described high frequency transformer is used for described rectifier filter circuit, and described rectifier filter circuit becomes direct current output with the high-frequency alternating current conversion; The feeder ear of described surge current control unit is by the auxiliary winding parallel of described high frequency transformer; Described Current Mutual Inductance sampler converts output load current to voltage signal, feeds back to the PWM controller by error amplifying circuit.
Further, described high-power PWM type switching power supply also comprises driving transformer, pwm driver; Described half-bridge circuit converter drives by the PWM controller via described driving transformer and described pwm driver.
Further, described high-power PWM type switching power supply also comprises accessory power supply, VADJ adjuster; Described accessory power supply is connected with electromagnetic interface filter, and described accessory power supply provides voltage for the PWM controller; Described VADJ adjuster is used for outside manual adjustment PWM and controls parameter.
Further, described high-power PWM type switching power supply also comprises V feedback circuit, superpressure testing circuit and described light-emitting diode display; Described V feedback circuit, superpressure testing circuit and the light-emitting diode display of being connected are connected with dc output end.Described V feedback circuit, superpressure testing circuit are used for regulated output voltage, and described light-emitting diode display is used for showing the voltage and current parameter of output.
Further, be connected to the surge current control unit on the auxiliary winding of high frequency transformer, control device is arranged between electromagnetic interface filter and frequency rectifier, is formed in parallel with NTC device and relay contact.
(3) beneficial effect
It is little, lightweight that high-power PWM type switching power supply of the present utility model has a volume, and Voltage-output is stable, can adapt to that voltage fluctuation is large, the line voltage environment of wide ranges uses.Simultaneously, high-power PWM type switching power supply of the present utility model also has surge current to be controlled and overtemperature protection system, can take precautions against the problems such as output short-circuit that occur because of in production, test, process of the test, prevents the damage to power-supply device.
Description of drawings
Fig. 1 is the high-power PWM type of the utility model switching power supply functional-block diagram.
Fig. 2 is the topological structure schematic diagram of main circuit.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples are used for explanation the utility model, but are not used for limiting scope of the present utility model.
As Fig. 1, shown in Figure 2, a kind of high-power PWM type switching power supply includes and exchanges input interface, electromagnetic interface filter 1, surge current control unit 2, frequency rectifier 3, half-bridge circuit converter 4, high frequency transformer 5, PWM controller 9, soft starting circuit 14, rectifier filter circuit 6 and direct current output interface; The alternating current of described interchange input interface is to described electromagnetic interface filter 1, and described electromagnetic interface filter 1 is introduced alternating current, and stops the electromagnetic interference that produces when the current-modulation because of switching power supply to be transferred to electrical network; The alternating current of introducing is through described surge current control unit 2, and described surge current control unit 2 reduces the start impulse current when switching power supply starts; The alternating current of introducing is by described frequency rectifier 3 outputs, and described frequency rectifier 3 converts alternating current to direct current and delivers to described half-bridge circuit converter 4;
The driving mouth of described half-bridge circuit converter 4 is connected with driving transformer 7; The pwm control signal that PWM controller 9 produces through pwm driver 8, send into the driving mouth of half-bridge circuit converter 4 through driving transformer 7, described half-bridge circuit converter 4 is under the PWM pulse-width signal is controlled, direct current is transformed to the high-frequency alternating electric current, main winding by described high frequency transformer 5, auxiliary winding induction at described high frequency transformer 5 produces low pressure high-frequency alternating electric current, and described rectifier filter circuit 6 is carried out rectification and output with the high-frequency alternating electric current of described high frequency transformer 5 auxiliary winding inductions;
The contact SJ of described surge current control unit 2 is contacts of relay, and the control power supply of relay coil is provided by the auxiliary winding of described high frequency transformer 5; Described Current Mutual Inductance sampler 10 is connected with the main winding of high frequency transformer 5, and the high-frequency alternating current conversion of half-bridge circuit converter 4 is become voltage signal, feeds back to PWM controller 9 by error amplifying circuit 11; Described accessory power supply 18 provides power supply through overheat protector 17 for PWM controller 9; Described VADJ adjuster is used for outside manual adjustment, regulates the PWM controlled quentity controlled variable; Described PWM controller 9 produces the pwm control signal of output, drives described half-bridge circuit converter 4 via described pwm driver 8 and described driving transformer 7; Described V feedback circuit 12, superpressure testing circuit 13 and the light-emitting diode display 16 of being connected are connected with dc output end, and described V feedback circuit, superpressure testing circuit are used for regulated output voltage; Described light-emitting diode display 16 is used for showing the output voltage current parameters of complete machine.
Fig. 2 is main circuit topological structure schematic diagram of the present utility model, in Fig. 2, exchange AC power supplies and access main circuit after EMI filter circuit 1, the NTC device of surge current control unit 2 and relay contact SJ, two end points of these two devices are connected to respectively between EMI filter circuit 1 and frequency rectifier 3, and the power supply of SJ relay coil is provided by an auxiliary winding of high frequency transformer 5.The alternating voltage of introducing through frequency rectifier 3 rectifications after, DC high-voltage power supply is stored in two capacitor C1 and C2 of half-bridge circuit converter 4.As shown in Figure 2, half-bridge circuit converter 4 is comprised of two capacitors and two MOSFET pipes.Capacitor C1 and C2 tandem-type connection, two MOSFET pipe Q1 and Q2 are also tandem-type connections.Be connected with the former limit winding of high frequency transformer 5, the former limit winding of capacitor C3, Current Mutual Inductance sampler IT between B point and A point, they consist of series loop.During 4 work of half-bridge circuit converter, under pwm signal drives, direct current is transformed to the high-frequency alternating function of current on the main winding of high frequency transformer 5, secondary winding output low pressure high-frequency alternating electric current from high frequency transformer 5, after rectifier filter circuit 6 rectifying and wave-filterings, for detecting, direct-current electric motor performance provides powerful DC stabilized power supply.
The closed-loop control system that the control system of the high-power PWM type of the utility model switching power supply is comprised of Current Mutual Inductance sampler 10, error amplifying circuit 11, V feedback circuit 12, superpressure testing circuit 13 and PWM controller 9.As shown in Figure 1 and Figure 2, when half-bridge circuit converter 4 moved in conversion, Current Mutual Inductance sampler 10 Real-time Collection running currents were introduced error amplifying circuit 11 with collection signal and are processed, and current parameters is sent into PWM controller 9; On the other hand, through the DC power supply of rectifier filter circuit 6 outputs, through the processing of 13 detections of superpressure testing circuit and V feedback circuit 12, its voltage parameter is also sent into PWM controller 9.After PWM controller 9 was processed electric current, voltage parameter, the PWM pulsewidth was adjusted in output, through pwm driver 8, driving transformer 7, for two-tube Q1, the Q2 of half-bridge circuit converter 4 provides the PWM modulation signal, thereby form closed-loop control, the stable output that keeps power supply.
In the control system of the high-power PWM type of the utility model switching power supply, be provided with soft starting circuit 14, with the impact that reduces to start shooting to main circuit; In control system, the external VADJ adjuster 15 that is provided with can be regulated the voltage output value of stabilized voltage power supply easily; Simultaneously, power supply also is provided with light-emitting diode display, and voltage, the current value of display power supply output in real time are so that the user understands and grasp; In control system, also be provided with overtemperature protection system 17.Overtemperature protection system 17 is arranged on the outer surface of two MOSFET pipe Q1 and Q2; to detect the actual work temperature of MOSFET pipe; when make MOSFET pipe temperature increase because of the overcurrent of transshipping or short circuit causes; overtemperature protection system 17 will cut off the Power supply of PWM controller 9 automatically; stop exporting the PWM modulation signal; the closing switch power supply, protection MOSFET pipe is without prejudice.
As shown in Figure 2, frequency rectifier 3 is comprised of 4 diode D1, D2, D3, D4; Half-bridge circuit converter 4 is comprised of 2 capacitor C1, C2 and 2 MOSFET pipe Q1 and Q2; IT is Current Mutual Inductance sampler 10; T1 is high frequency transformer 5, and its secondary winding and 2 high-frequency rectification diode D5 and D6 join, and capacitor C4 is filtering high-frequency rectifier; At the positive terminal extraction voltage signal of DC out-put supply end C4, at resistance R 1 end extracted current signal, as the measuring control point of superpressure testing circuit 13, V feedback circuit 12, for PWM controller 9 provides voltage, current feedback signal.An auxiliary winding of high frequency transformer 5 is the relay SJ power supply of surge current control unit.The S1 switch is 220V/110V line voltage diverter switch, and high power switching power supply of the present utility model can use two kinds of mains supplies.
It is little, lightweight that high-power PWM type switching power supply of the present utility model has a volume, and the Voltage-output stable performance can adapt to that voltage ripple of power network is large, the voltage environment of wide ranges uses.Simultaneously, high-power PWM type switching power supply of the present utility model also has surge current to be controlled and overtemperature protection system, can take precautions against the problems such as output short-circuit that occur because of in production, test, process of the test, prevents the damage to power-supply device.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (5)
1. a high-power PWM type switching power supply, is characterized in that: include and exchange input interface, electromagnetic interface filter, surge current control unit, frequency rectifier, Current Mutual Inductance sampler, half-bridge circuit converter, high frequency transformer, PWM controller, soft starting circuit, rectifier filter circuit and direct current output interface; Described interchange input interface is connected with the input interface of electromagnetic interface filter, the output interface of described electromagnetic interface filter is connected with the input interface of described surge current control unit, the output interface of described surge current control unit is connected with the AC of described frequency rectifier, and described frequency rectifier converts alternating current to direct current; The DC side of described frequency rectifier is connected with described half-bridge circuit converter, the drive end of described half-bridge circuit converter is connected with the PWM controller, and described half-bridge circuit converter is modulated to the high-frequency alternating electric current through the former limit of described high frequency transformer winding with direct current; Secondary winding output high-frequency alternating electric current at described high frequency transformer is used for described rectifier filter circuit, and described rectifier filter circuit becomes direct current output with the high-frequency alternating current conversion; The feeder ear of described surge current control unit is by the auxiliary winding parallel of described high frequency transformer; Described Current Mutual Inductance sampler converts output load current to voltage signal, feeds back to the PWM controller by error amplifying circuit.
2. high-power PWM type switching power supply as claimed in claim 1, it is characterized in that: described high-power PWM type switching power supply also comprises driving transformer, pwm driver; Described half-bridge circuit converter drives by the PWM controller via described driving transformer and described pwm driver.
3. high-power PWM type switching power supply as claimed in claim 1, it is characterized in that: described high-power PWM type switching power supply also comprises accessory power supply, VADJ adjuster; Described accessory power supply is connected with electromagnetic interface filter, and described accessory power supply provides voltage for the PWM controller; Described VADJ adjuster is used for outside manual adjustment PWM and controls parameter.
4. high-power PWM type switching power supply as claimed in claim 1, it is characterized in that: described high-power PWM type switching power supply also comprises V feedback circuit, superpressure testing circuit and described light-emitting diode display; Described V feedback circuit, superpressure testing circuit and the light-emitting diode display of being connected are connected with dc output end, and described V feedback circuit, superpressure testing circuit are used for regulated output voltage, and described light-emitting diode display is used for showing the voltage and current parameter of output.
5. high-power PWM type switching power supply as claimed in claim 1, it is characterized in that: be connected to the surge current control unit on the auxiliary winding of high frequency transformer, control device is arranged between electromagnetic interface filter and frequency rectifier, is formed in parallel with NTC device and relay contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120557478 CN202940740U (en) | 2011-12-28 | 2011-12-28 | High-power PWM type switch voltage-stabilized power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120557478 CN202940740U (en) | 2011-12-28 | 2011-12-28 | High-power PWM type switch voltage-stabilized power supply |
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| Publication Number | Publication Date |
|---|---|
| CN202940740U true CN202940740U (en) | 2013-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120557478 Expired - Fee Related CN202940740U (en) | 2011-12-28 | 2011-12-28 | High-power PWM type switch voltage-stabilized power supply |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683482A (en) * | 2013-12-27 | 2014-03-26 | 广东威创视讯科技股份有限公司 | Hot plug and unplug redundant Potential Difference (PD) power supply device |
| CN103746571A (en) * | 2014-01-21 | 2014-04-23 | 上海镭芯微电子有限公司 | Power supply device suitable for pulse output load |
| CN105322628A (en) * | 2015-10-27 | 2016-02-10 | 赵晓玲 | Electromobile safety charging system based on digital signal processing |
| CN107947551A (en) * | 2017-12-12 | 2018-04-20 | 成都爱特联科技有限公司 | High frequency switch power with real-time voltage electric current display function |
| CN110535346A (en) * | 2019-04-29 | 2019-12-03 | 天长市富安电子有限公司 | A kind of industrial module power supply substituting Industrial Frequency Transformer |
-
2011
- 2011-12-28 CN CN 201120557478 patent/CN202940740U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683482A (en) * | 2013-12-27 | 2014-03-26 | 广东威创视讯科技股份有限公司 | Hot plug and unplug redundant Potential Difference (PD) power supply device |
| CN103746571A (en) * | 2014-01-21 | 2014-04-23 | 上海镭芯微电子有限公司 | Power supply device suitable for pulse output load |
| CN103746571B (en) * | 2014-01-21 | 2016-06-08 | 上海镭芯微电子有限公司 | A kind of supply unit adapting to pulse output loading |
| CN105322628A (en) * | 2015-10-27 | 2016-02-10 | 赵晓玲 | Electromobile safety charging system based on digital signal processing |
| CN107947551A (en) * | 2017-12-12 | 2018-04-20 | 成都爱特联科技有限公司 | High frequency switch power with real-time voltage electric current display function |
| CN110535346A (en) * | 2019-04-29 | 2019-12-03 | 天长市富安电子有限公司 | A kind of industrial module power supply substituting Industrial Frequency Transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20151228 |
|
| EXPY | Termination of patent right or utility model |