CN102790541B - A kind of Switching Power Supply for automotive air-conditioning controller VFD display screen - Google Patents
A kind of Switching Power Supply for automotive air-conditioning controller VFD display screen Download PDFInfo
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- CN102790541B CN102790541B CN201210207236.3A CN201210207236A CN102790541B CN 102790541 B CN102790541 B CN 102790541B CN 201210207236 A CN201210207236 A CN 201210207236A CN 102790541 B CN102790541 B CN 102790541B
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Abstract
The invention discloses a kind of Switching Power Supply for automotive air-conditioning controller VFD display screen, comprise exciting circuit, exciting circuit connects armature winding A, armature winding A is connected with secondary winding A1, secondary winding A2 and secondary winding A3 magnetic coupling respectively, utilizes the transformation of secondary winding A3 and the first normal shock current rectifying and wave filtering circuit to produce direct-flow positive voltage Vout3; The transformation of secondary winding A2 and flyback current rectifying and wave filtering circuit is utilized to produce negative DC voltage Vout2; The transformation of secondary winding A1 and the second normal shock current rectifying and wave filtering circuit is utilized to produce floating voltage Vout1.This Switching Power Supply utilizes and uses the bidirectional switch power supply of normal shock flyback to provide voltage in several modes simultaneously, mates the demand of multiple voltage on automotive air-conditioning controller VFD display screen, effectively reduces volume of transformer, weight reducing costs.
Description
Technical field
The present invention relates to a kind of Switching Power Supply, refer in particular to a kind of Switching Power Supply for automotive air-conditioning controller VFD display screen.
Background technology
Dynamic driving vacuum fluorescence screen display device is made up of dynamic driving vacuum fluorescent display screen (being called for short VFD), VFD driving, MCU and Switching Power Supply.Wherein, Switching Power Supply provides many group output voltages for the filament of VFD, plate grid pole and VFD drive and MCU, and output voltage have just have negative, in the Switching Power Supply for automotive air-conditioning controller VFD display screen, if realized by the single-way switch mode of traditional positive activation type or inverse-excitation type, because the positive activation type transformer used or flyback transformer are all single-way switch, the magnetic core of transformer volume of demand is large, coil turn is many, high to the power requirement of driving element, cost is corresponding raising also, the little product in some inner spaces will be subject to design restriction because of these shortcomings of Switching Power Supply when applying dynamic driving VFD.
China Patent Publication No., publication date on September 30th, 2009, name is called in the patent of invention of " multi-output switching power source device " and discloses a kind of multi-output switching power source device at least have transformer T1a and the transformer T2a of primary winding, the first secondary coil and the second secondary coil; Adjustment applies the control circuit of the time of direct voltage on the primary winding P1 of transformer T1a; Rectifying and wave-filtering is carried out to the voltage produced on the first secondary coil S1 of transformer T1a, takes out the first current rectifying and wave filtering circuit of the first output voltage; Adjustment applies the control circuit of the time of direct voltage on the primary winding P2 of transformer T2a; Rectifying and wave-filtering is carried out to the voltage produced on the first secondary coil S2 of transformer T2a, takes out the second current rectifying and wave filtering circuit of the second output voltage; And rectifying and wave-filtering is carried out to the both end voltage of the series coil of the second secondary coil S32 of the second secondary coil S31 and transformer T2a that are connected in series transformer T1a, take out the 3rd current rectifying and wave filtering circuit of the 3rd output voltage.But the multiple voltage that this switching device exports is direct-flow positive voltage, can not meet the demand of VFD display screen needs direct-flow positive voltage, negative DC voltage and floating voltage.
Summary of the invention
The object of the invention is to overcome the Switching Power Supply in prior art in automotive air-conditioning controller VFD display screen because need voltage in several modes, cause transformer equipment volume larger, high to the power requirement of driving element, the defect of cost also corresponding raising, a kind of Switching Power Supply for automotive air-conditioning controller VFD display screen is provided, this Switching Power Supply utilizes and uses the bidirectional switch power supply of normal shock flyback to provide voltage in several modes simultaneously, effectively reduces volume of transformer, weight reducing costs.
The object of the invention is to be achieved by following technical proposals:
A kind of Switching Power Supply for automotive air-conditioning controller VFD display screen, comprise exciting circuit, exciting circuit connects armature winding A, armature winding A is connected with secondary winding A1, secondary winding A2 and secondary winding A3 magnetic coupling respectively, the first end of the first end of secondary winding A1, the first end of secondary winding A2 and secondary winding A3 is Same Name of Ends, and second end of second end of secondary winding A1, second end of secondary winding A2 and secondary winding A3 is non-same polarity; The alternating voltage Vac that exciting circuit produces is added on armature winding A, utilizes the transformation of secondary winding A3 and the first normal shock current rectifying and wave filtering circuit to produce direct-flow positive voltage Vout3; The alternating voltage Vac that exciting circuit produces is added on armature winding A, utilizes the transformation of secondary winding A2 and flyback current rectifying and wave filtering circuit to produce negative DC voltage Vout2; The alternating voltage Vac that exciting circuit produces is added on armature winding A, utilizes the transformation of secondary winding A1 and the second normal shock current rectifying and wave filtering circuit to produce floating voltage Vout1.Voltage required on motorcar air conditioner VFD display screen have drive for MCU and VFD supply voltage, for the actuation voltage that provides VFD to drive and the floating voltage for being supplied to VFD filament, the direct-flow positive voltage Vout3, the negative DC voltage Vout2 that there is provided of corresponding Switching Power Supply of the present invention and floating voltage Vout1 respectively, many need by an armature winding and three secondary winding, normal shock and flyback are utilized to an input voltage simultaneously, reaches required three kinds of output voltages.Compare the demand that other traditional independent forward converters and circuit of reversed excitation reach different output voltage, volume of transformer required for the present invention effectively reduces, and weight and cost also decrease.
As a kind of preferred version, first normal shock current rectifying and wave filtering circuit comprises diode D3 and electrochemical capacitor C3, the anode of diode D3 connects the first end of secondary winding A3, the negative electrode of diode D3 connects the positive pole of electrochemical capacitor C3, the minus earth of electrochemical capacitor C3, the second end ground connection of secondary winding A3, direct-flow positive voltage Vout3 is the voltage at electrochemical capacitor C3 two ends.This connection is normal shock current rectifying and wave filtering circuit, diode D3 carries out rectification, electrochemical capacitor C3 carries out filtering, produce direct-flow positive voltage Vout3, the size of direct-flow positive voltage Vout3 can change according to the turn ratio of armature winding A and secondary winding A3, controls turn ratio and can obtain required direct-flow positive voltage Vout3.
As a kind of preferred version, flyback current rectifying and wave filtering circuit comprises diode D2 and electrochemical capacitor C2, the negative electrode of diode D2 connects the first end of secondary winding A2, the anode of diode D2 connects the negative pole of electrochemical capacitor C2, the plus earth of electrochemical capacitor C2, the second end ground connection of secondary winding A2, negative DC voltage Vout2 is the voltage at electrochemical capacitor C2 two ends.This connection is flyback current rectifying and wave filtering circuit, diode D2 carries out rectification, electrochemical capacitor C2 carries out filtering, produce negative DC voltage Vout2, the size of negative DC voltage Vout2 can change according to the turn ratio of armature winding A and secondary winding A2, controls turn ratio and can obtain required negative DC voltage Vout2.
As a kind of preferred version, second normal shock current rectifying and wave filtering circuit comprises diode D1 and electrochemical capacitor C1, the anode of diode D1 connects the first end of secondary winding A1, the negative electrode of diode D1 connects the positive pole of electrochemical capacitor C1, the negative pole of electrochemical capacitor C1 connects second end of secondary winding A3, second end of secondary winding A1 also connects the anode of diode D2, and floating voltage Vout1 is the voltage at electrochemical capacitor C1 two ends.This connection is normal shock current rectifying and wave filtering circuit, diode D1 carries out rectification, electrochemical capacitor C1 carries out filtering, produce floating voltage Vout1, the size of floating voltage Vout1 is just, second end of secondary winding A3 is connected with second end of secondary winding A2 by diode D2, therefore the lower limit of floating voltage is the value of negative DC voltage Vout2, the numerical value of floating voltage Vout1 is that higher limit deducts lower limit, the numerical value of floating voltage Vout1 can change according to the turn ratio of armature winding A and secondary winding A3, control the higher limit that turn ratio can change Vout1, then required direct-flow positive voltage Vout1 is obtained.
As a kind of preferred version, the negative electrode of diode D3 also connects exciting circuit, direct-flow positive voltage Vout3 as feedback signal back to exciting circuit.Direct-flow positive voltage Vout3 as feedback signal back to exciting circuit, for regulated output voltage.
As a kind of preferred version, exciting circuit is the exciting circuit comprising pwm circuit.PWM makes output voltage keep constant, and control is simple, flexibility is high, dynamic response good.
The invention has the beneficial effects as follows, this Switching Power Supply utilizes and uses the bidirectional switch power supply of normal shock flyback to provide voltage in several modes simultaneously, coupling demand of multiple voltage on automotive air-conditioning controller VFD display screen, effectively reduces volume of transformer, weight reducing costs.
Accompanying drawing explanation
Fig. 1 is a kind of circuit connection diagram of the present invention;
Fig. 2 is the oscillogram of input voltage vin in the present invention;
Fig. 3 is the oscillogram of alternating voltage Vac in the present invention;
Fig. 4 is the oscillogram of direct-flow positive voltage Vout3, negative DC voltage Vout2 in the present invention, floating voltage Vout1.
Wherein: 1, exciting circuit, 2, pwm circuit.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
Embodiment: a kind of Switching Power Supply for automotive air-conditioning controller VFD display screen, its circuit theory connection layout as shown in Figure 1, comprise exciting circuit 1, exciting circuit comprises pwm circuit 2, exciting circuit connects armature winding A, armature winding A is connected with secondary winding A1, secondary winding A2 and secondary winding A3 magnetic coupling respectively, the first end of the first end of secondary winding A1, the first end of secondary winding A2 and secondary winding A3 is Same Name of Ends, and second end of second end of secondary winding A1, second end of secondary winding A2 and secondary winding A3 is non-same polarity, the anode of diode D3 connects the first end of secondary winding A3, the negative electrode of diode D3 connects the positive pole of electrochemical capacitor C3, the minus earth of electrochemical capacitor C3, the second end ground connection of secondary winding A3, the negative electrode of diode D2 connects the first end of secondary winding A2, the anode of diode D2 connects the negative pole of electrochemical capacitor C2, the plus earth of electrochemical capacitor C2, the second end ground connection of secondary winding A2, the anode of diode D1 connects the first end of secondary winding A1, the negative electrode of diode D1 connects the positive pole of electrochemical capacitor C1, the negative pole of electrochemical capacitor C1 connects second end of secondary winding A1, the negative electrode of diode D3 also connects exciting circuit.
The oscillogram of DC input voitage Vin as shown in Figure 2, its value is 12V, the oscillogram of the alternating voltage Vac produced after overdriving circuit as shown in Figure 3, its positive portions is square wave, its negative loop is spike ripple, square wave and spike ripple alternately appear in oscillogram, Vac is added on armature winding A, the transformation of secondary winding A3 and the first normal shock current rectifying and wave filtering circuit is utilized to produce direct-flow positive voltage Vout3, the turn ratio of armature winding A and secondary winding A3 is 10:1.73, direct-flow positive voltage Vout3 is the voltage at electrochemical capacitor C3 two ends, its oscillogram as shown in Figure 4, its value is 5V, the alternating voltage Vac that exciting circuit produces is added on armature winding A, the transformation of secondary winding A2 and flyback current rectifying and wave filtering circuit is utilized to produce negative DC voltage Vout2, the turn ratio of armature winding A and secondary winding A2 is 10:3.87, negative DC voltage Vout2 is the voltage at electrochemical capacitor C2 two ends, as shown in Figure 4, its value is-18V to its oscillogram, the alternating voltage Vac that exciting circuit produces is added on armature winding A, the transformation of secondary winding A1 and the second normal shock current rectifying and wave filtering circuit is utilized to produce floating voltage Vout1, the turn ratio of armature winding A and secondary winding A1 is 10:1, floating voltage Vout1 is the voltage at electrochemical capacitor C1 two ends, its oscillogram as shown in Figure 4, its value is 3.7V, and its upper limit is-14.3V, and lower limit is-18V.Floating voltage Vout1 is the voltage of the filament for being supplied to VFD, negative DC voltage Vout2 is the actuation voltage driven for being supplied to VFD, direct-flow positive voltage Vout3 is the supply voltage driven for being supplied to MCU, VFD, utilizes the normal shock flyback of a Switching Power Supply to use simultaneously and reaches the demand being supplied to automotive air-conditioning controller VFD display screen and needing multiple voltage to input.
Claims (3)
1. the Switching Power Supply for automotive air-conditioning controller VFD display screen, it is characterized in that, comprise exciting circuit (1), exciting circuit connects armature winding A, armature winding A is connected with secondary winding A1, secondary winding A2 and secondary winding A3 magnetic coupling respectively, the first end of the first end of secondary winding A1, the first end of secondary winding A2 and secondary winding A3 is Same Name of Ends, and second end of second end of secondary winding A1, second end of secondary winding A2 and secondary winding A3 is non-same polarity; The alternating voltage Vac that exciting circuit produces is added on armature winding A, utilizes the transformation of secondary winding A3 and the first normal shock current rectifying and wave filtering circuit to produce direct-flow positive voltage Vout3; The alternating voltage Vac that exciting circuit produces is added on armature winding A, utilizes the transformation of secondary winding A2 and flyback current rectifying and wave filtering circuit to produce negative DC voltage Vout2; The alternating voltage Vac that exciting circuit produces is added on armature winding A, utilizes the transformation of secondary winding A1 and the second normal shock current rectifying and wave filtering circuit to produce floating voltage Vout1; The first described normal shock current rectifying and wave filtering circuit comprises diode D3 and electrochemical capacitor C3, the anode of diode D3 connects the first end of secondary winding A3, the negative electrode of diode D3 connects the positive pole of electrochemical capacitor C3, the minus earth of electrochemical capacitor C3, the second end ground connection of secondary winding A3, direct-flow positive voltage Vout3 is the voltage at electrochemical capacitor C3 two ends; Described flyback current rectifying and wave filtering circuit comprises diode D2 and electrochemical capacitor C2, the negative electrode of diode D2 connects the first end of secondary winding A2, the anode of diode D2 connects the negative pole of electrochemical capacitor C2, the plus earth of electrochemical capacitor C2, the second end ground connection of secondary winding A2, negative DC voltage Vout2 is the voltage at electrochemical capacitor C2 two ends; The second described normal shock current rectifying and wave filtering circuit comprises diode D1 and electrochemical capacitor C1, the anode of diode D1 connects the first end of secondary winding A1, the negative electrode of diode D1 connects the positive pole of electrochemical capacitor C1, the negative pole of electrochemical capacitor C1 connects second end of secondary winding A1, second end of secondary winding A1 also connects the anode of diode D2, and floating voltage Vout1 is the voltage at electrochemical capacitor C1 two ends.
2. a kind of Switching Power Supply for automotive air-conditioning controller VFD display screen according to claim 1, it is characterized in that, the negative electrode of diode D3 also connects exciting circuit, direct-flow positive voltage Vout3 as feedback signal back to exciting circuit.
3. a kind of Switching Power Supply for automotive air-conditioning controller VFD display screen according to claim 1, is characterized in that, described exciting circuit is for comprising the exciting circuit of pwm circuit (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210207236.3A CN102790541B (en) | 2012-06-21 | 2012-06-21 | A kind of Switching Power Supply for automotive air-conditioning controller VFD display screen |
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| CN201210207236.3A CN102790541B (en) | 2012-06-21 | 2012-06-21 | A kind of Switching Power Supply for automotive air-conditioning controller VFD display screen |
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| CN102790541A CN102790541A (en) | 2012-11-21 |
| CN102790541B true CN102790541B (en) | 2015-10-28 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2669526Y (en) * | 2003-12-12 | 2005-01-05 | 青岛海信电器股份有限公司 | Television receiver circuit capable of displaying different working states |
| CN1913306A (en) * | 2005-08-12 | 2007-02-14 | 上海三星真空电子器件有限公司 | Switch power circuit for vacuum fluorescence display of charger on vehicle |
| CN202840987U (en) * | 2012-06-21 | 2013-03-27 | 杭州广安汽车电器有限公司 | Switch power supply used for automobile air-conditioner controller VFD display screen |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4258560B2 (en) * | 2007-06-28 | 2009-04-30 | サンケン電気株式会社 | Multi-output switching power supply |
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- 2012-06-21 CN CN201210207236.3A patent/CN102790541B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2669526Y (en) * | 2003-12-12 | 2005-01-05 | 青岛海信电器股份有限公司 | Television receiver circuit capable of displaying different working states |
| CN1913306A (en) * | 2005-08-12 | 2007-02-14 | 上海三星真空电子器件有限公司 | Switch power circuit for vacuum fluorescence display of charger on vehicle |
| CN202840987U (en) * | 2012-06-21 | 2013-03-27 | 杭州广安汽车电器有限公司 | Switch power supply used for automobile air-conditioner controller VFD display screen |
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| CN102790541A (en) | 2012-11-21 |
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Denomination of invention: A switching power supply for VFD display screen of automobile air conditioning controller Effective date of registration: 20211023 Granted publication date: 20151028 Pledgee: Industrial and Commercial Bank of China Limited Hangzhou Fuyang sub branch Pledgor: Hangzhou Guangan Automobile Electric Co.,Ltd. Registration number: Y2021330001998 |
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