CN202424501U - Switch power supply - Google Patents
Switch power supply Download PDFInfo
- Publication number
- CN202424501U CN202424501U CN2011205201691U CN201120520169U CN202424501U CN 202424501 U CN202424501 U CN 202424501U CN 2011205201691 U CN2011205201691 U CN 2011205201691U CN 201120520169 U CN201120520169 U CN 201120520169U CN 202424501 U CN202424501 U CN 202424501U
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- Prior art keywords
- power supply
- voltage
- switch pipe
- power switch
- switching power
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Abstract
The utility model discloses a switch power supply, which comprises a control unit, a power switch tube, a switch drive unit for driving the power switch tube to open or close and a voltage converter for converting the voltage outputted by the power switch tube to direct-current voltage; the control unit controls the power switch tube to open or close through the switch drive unit on the basis of a switch frequency, the power switch tube is respectively and electrically connected with the voltage converter and the switch drive unit, and the switch drive unit is also electrically connected with the control unit. The switch power supply is provided with the independent power switch tube and the voltage converter influencing the output power and the output voltage, and the power supply is applicable to different power switch tubes through the switch drive unit, so that the adaptability of the switch power supply can be improved.
Description
Technical field
The utility model relates to a kind of power supply, particularly relates to a kind of Switching Power Supply.
Background technology
Switching Power Supply is a kind of common technology in the modern power electronics technology, and wherein Switching Power Supply is the time ratio that turns on and off through control switch, thereby keeps a kind of power supply of regulated output voltage.
Existing Switching Power Supply generally is to be made up of jointly pulse width modulation (PWM) control circuit and switch, and comes opening or turn-offing of control switch through pulse width modulation control circuit, thereby produces stable output voltage.Switching Power Supply is compared with traditional linear power supply, and biggest advantage is that delivery efficiency is high, and volume is little, thereby has obtained using widely.
But existing various Switching Power Supply only is used for specific power output and output voltage; So under the situation of power output that broad is arranged and output voltage; Can only change various existing Switching Power Supply; But different Switching Power Supplies are applicable in the same system user needs further each different Switching Power Supply to be processed, so improved maintenance and processing cost.
The utility model content
The technical problem that the utility model will solve is under the situation of power output with broad and output voltage, to need to adopt different Switching Power Supplies in the prior art in order to overcome; Thereby increase the defective of maintenance and processing cost; A kind of Switching Power Supply is provided; Through independently being provided with, and be applicable to the different power switches pipe, so when changing Switching Power Supply through the switch drive unit to power output and influential power switch pipe of output voltage and electric pressure converter; Do not need integrally to change, improved the applicability of Switching Power Supply.
The utility model solves above-mentioned technical problem through following technical proposals:
The utility model provides a kind of Switching Power Supply, comprises a control unit; Be characterized in that said Switching Power Supply also comprises: a power switch pipe, be used to drive a switch drive unit and an electric pressure converter that is used for the output voltage of said power switch pipe is converted into direct voltage of the closure or openness of said power switch pipe;
Wherein said control unit is based on the closure or openness of a switching frequency through the said power switch pipe of said switch drive unit controls; Said power switch pipe is electrically connected with said electric pressure converter and said switch drive unit respectively, and said switch drive unit also is electrically connected with said control unit.
Preferably, said control unit is based on the direct voltage that is converted to through said electric pressure converter and a preset reference voltage, the duty ratio of regulating said switching frequency.
Preferably, said Switching Power Supply also comprises an input unit, and the user is provided with said switching frequency and said reference voltage through said input unit in said control unit.
Preferably, said Switching Power Supply also comprises a voltage regulation unit, and said voltage regulation unit is used to suppress the fluctuation of drive signal of the closure or openness of the said power switch pipe of said switch drive unit drives.
Preferably, said voltage regulation unit is a voltage-stabiliser tube.
Preferably; Said electric pressure converter comprises an inductance, an electrochemical capacitor and a diode; Wherein said inductance is used to store the electric energy of said power switch pipe output, and said electrochemical capacitor is used for the interference noise of the said inductance output of filtering electric energy, and the negative electrode of said diode is connected with said inductance; The anode of said diode is connected with the cathodic electricity of said electrochemical capacitor, and the anode of said electrochemical capacitor is electrically connected with said inductance.
The positive progressive effect of the utility model is:
The Switching Power Supply of the utility model is through independently being provided with power output and influential power switch pipe of output voltage and electric pressure converter; And be applicable to the different power switches pipe through the switch drive unit; So when changing Switching Power Supply; Do not need integrally to change, improved the applicability of Switching Power Supply.
For the different power outputs and the requirement of output voltage, the user can also be through changing the requirement that said power switch pipe and electric pressure converter satisfy said power output and output voltage in addition.And owing to only changed power switch pipe and electric pressure converter, so also be convenient to safeguard, and avoided the replacing of whole Switching Power Supply, so provide cost savings.
Description of drawings
Fig. 1 is the structural representation of first embodiment of the utility model Switching Power Supply.
Fig. 2 is the structural representation of second embodiment of the utility model Switching Power Supply.
Embodiment
Provide the utility model preferred embodiment below in conjunction with accompanying drawing, to specify the technical scheme of the utility model.
First embodiment:
As shown in Figure 1, the Switching Power Supply of present embodiment comprises a MCU (microcontroller) 1, a power switch pipe 2, a switch driver 3 and an electric pressure converter 4.
Wherein said MCU1 is used for the closure or openness through the said power switch pipe 2 of said switch driver 3 controls based on a switching frequency f.The technical staff can also relating to needs or require adopting control units such as single-chip microcomputer according to reality in addition.
Said switch driver 3 is used to drive the closure or openness of said power switch pipe 2.Be that said MCU1 controls said switch driver 3 output drive signals based on switching frequency f; Said power switch pipe 2 is based on the said power switch pipe 2 of said drive signal closure or openness; Wherein when said power switch pipe 2 was closed, said power switch pipe 2 is level unit output electric energy backward; When said power switch pipe 2 was opened, said power switch pipe 2 stopped level unit output electric energy backward.
Said electric pressure converter 4 is used for converting the output voltage of said power switch pipe 2 into direct voltage V.Make that promptly output voltage changes no longer over time.Wherein comprise an inductance 41, an electrochemical capacitor 42 and a diode 43 in the electric pressure converter 4 of present embodiment; Wherein said inductance 41 is used to store the electric energy of said power switch pipe 2 outputs; Said electrochemical capacitor 42 is used for the interference noise of the said inductance 41 output electric energy of filtering; The negative electrode of said diode 43 is connected with said inductance 41, and the anode of said diode 43 is connected with the cathodic electricity of said electrochemical capacitor 42, and the anode of said electrochemical capacitor 42 is electrically connected with said inductance 41.Therefore when said power switch pipe 2 is closed, said inductance 41 and electrochemical capacitor 42 store electrical energy.When said power switch pipe 2 was opened, said inductance 41 discharged electric energy, and said electrochemical capacitor 42 also carries out filtering to the electric energy of said inductance 41 outputs when keeping the direct voltage V of output.And said diode 43 is used for afterflow, thereby makes said electric current between said inductance 41, electrochemical capacitor 42 and diode 43, flow, and promptly makes to have electric current all the time in the said inductance 41.
The said power switch pipe 2 of present embodiment can adopt MOSFET pipe (power field effect pipe) or insulated gate bipolar transistor (IGBT) etc.And power switch pipe described in the present embodiment 2 is electrically connected with said electric pressure converter 4 and said switch driver 3 respectively, and said switch driver 3 also is electrically connected with said MCU1.And because MCU1, power switch pipe 2, switch driver 3 and electric pressure converter 4 described in the present embodiment all are independent settings; So the user can change each parts respectively; Thereby be convenient to safeguard, and for the different power outputs and the requirement of output voltage, can be through changing the requirement that power switch pipe 2 and electric pressure converter 4 are adapted to said power output and output voltage; Thereby avoided the replacing of whole Switching Power Supply, so provide cost savings.
The operation principle of present embodiment is following:
Said MCU1 passes through switch driver 3 according to the said power switch pipe 2 of switching frequency f closure or openness.
When said power switch pipe 2 is closed, the inductance 41 and electrochemical capacitor 42 storage of electrical energy of said electric pressure converter 4, and to follow-up unit output dc voltage V.
When said power switch pipe 2 was opened, the inductance 41 of said electric pressure converter 4 discharged electric energy, and the electric energy of 42 pairs of said inductance 41 outputs of said electrochemical capacitor carries out filtering and keeps the direct voltage V to the output of follow-up unit.
Second embodiment:
As shown in Figure 2, the difference of the Switching Power Supply of the Switching Power Supply of present embodiment and first embodiment is:
Also comprise an input unit 5 and a voltage regulation unit 6 in the Switching Power Supply of present embodiment.And the size between the direct voltage V that relatively is converted to through said electric pressure converter 4 of said MCU1 and the preset reference voltage U, and the duty ratio of regulating said switching frequency f based on said size result relatively.For example, reduce the duty ratio of switching frequency f as said direct voltage V during greater than reference voltage U; As said direct voltage V during, increase the duty ratio of switching frequency f less than reference voltage U; Otherwise keep duty ratio constant.
Wherein the user is provided with said switching frequency f and said reference voltage U through said input unit 5 in said MCU1.So can think the size of the direct voltage V that changes final output and the power output efficient of controlling said power switch pipe 2.
Said voltage regulation unit 6 is used to suppress the fluctuation of drive signal that said switch driver 3 drives the closure or openness of said power switch pipe 2.The voltage regulation unit 6 of present embodiment can adopt voltage-stabiliser tube, and the technical staff can be based on actual needs and the stable-pressure device that requires to adopt other kinds or type in addition.
The operation principle of present embodiment is following:
The user is provided with switching frequency f and reference voltage U through said input unit 5 in said MCU1.The duty ratio that said then MCU1 regulates said switching frequency f according to the direct voltage V size result relatively of said reference voltage U and said electric pressure converter 4 outputs.
After this said MCU1 passes through switch driver 3 according to switching frequency f and the said power switch pipe 2 of duty ratio closure or openness thereof.
When said power switch pipe 2 is closed, the inductance 41 and electrochemical capacitor 42 storage of electrical energy of said electric pressure converter 4, and to follow-up unit output dc voltage V.
When said power switch pipe 2 was opened, the inductance 41 of said electric pressure converter 4 discharged electric energy, and the electric energy of 42 pairs of said inductance 41 outputs of said electrochemical capacitor carries out filtering and keeps the direct voltage V to the output of follow-up unit.
After this duty ratio that said MCU1 regulates said switching frequency f according to the direct voltage V size result relatively of said reference voltage U and said electric pressure converter 4 outputs in real time; Thereby constantly finely tune the direct voltage V of output; Prevent the fluctuation of direct voltage V, thus stable DC voltage V.
Though more than described the embodiment of the utility model, it will be understood by those of skill in the art that these only illustrate, the protection range of the utility model is limited appended claims.Those skilled in the art can make numerous variations or modification to these execution modes under the prerequisite of principle that does not deviate from the utility model and essence, but these changes and modification all fall into the protection range of the utility model.
Claims (6)
1. a Switching Power Supply comprises a control unit; It is characterized in that said Switching Power Supply also comprises: a power switch pipe, be used to drive a switch drive unit and an electric pressure converter that is used for the output voltage of said power switch pipe is converted into direct voltage of the closure or openness of said power switch pipe;
Wherein said control unit is based on the closure or openness of a switching frequency through the said power switch pipe of said switch drive unit controls; Said power switch pipe is electrically connected with said electric pressure converter and said switch drive unit respectively, and said switch drive unit also is electrically connected with said control unit.
2. Switching Power Supply as claimed in claim 1 is characterized in that, said control unit is based on the direct voltage that is converted to through said electric pressure converter and a preset reference voltage, the duty ratio of regulating said switching frequency.
3. Switching Power Supply as claimed in claim 2 is characterized in that said Switching Power Supply also comprises an input unit, and the user is provided with said switching frequency and said reference voltage through said input unit in said control unit.
4. like each described Switching Power Supply among the claim 1-3; It is characterized in that; Said Switching Power Supply also comprises a voltage regulation unit, and said voltage regulation unit is used to suppress the fluctuation of drive signal of the closure or openness of the said power switch pipe of said switch drive unit drives.
5. Switching Power Supply as claimed in claim 4 is characterized in that, said voltage regulation unit is a voltage-stabiliser tube.
6. Switching Power Supply as claimed in claim 4; It is characterized in that said electric pressure converter comprises an inductance, an electrochemical capacitor and a diode, wherein said inductance is used to store the electric energy of said power switch pipe output; Said electrochemical capacitor is used for the interference noise of the said inductance output of filtering electric energy; The negative electrode of said diode is connected with said inductance, and the anode of said diode is connected with the cathodic electricity of said electrochemical capacitor, and the anode of said electrochemical capacitor is electrically connected with said inductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205201691U CN202424501U (en) | 2011-12-13 | 2011-12-13 | Switch power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205201691U CN202424501U (en) | 2011-12-13 | 2011-12-13 | Switch power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202424501U true CN202424501U (en) | 2012-09-05 |
Family
ID=46749226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205201691U Expired - Fee Related CN202424501U (en) | 2011-12-13 | 2011-12-13 | Switch power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202424501U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102457172A (en) * | 2011-12-13 | 2012-05-16 | 上海微频莱机电科技有限公司 | Switching power supply |
-
2011
- 2011-12-13 CN CN2011205201691U patent/CN202424501U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102457172A (en) * | 2011-12-13 | 2012-05-16 | 上海微频莱机电科技有限公司 | Switching power supply |
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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: 20120905 Termination date: 20151213 |
|
| EXPY | Termination of patent right or utility model |