CN207819532U - A kind of Vehicular charger boosting servomechanism - Google Patents

Abstract

The utility model provides a kind of Vehicular charger boosting servomechanism, belongs to the new-energy automobile charging technique field of output wide-voltage range.The input terminal of the power conversion circuit exchanges connection with the external world, and output end is connect with lithium battery；The power conversion circuit includes exchange input filter circuit, input rectifying filter circuit, APFC booster circuits, DC/DC power conversion circuits, output filter circuit, the input filter circuit, input rectifying filter circuit, APFC booster circuits, DC/DC power conversion circuits, output filter circuit, and be sequentially connected；The utility model has adjusted the size of late-class circuit duty ratio, the problems such as finally reducing the working stress of outputting inductance, improve the efficiency of complete machine, improve the electromagnetic compatibility of complete machine.The utility model is adjusted by the closed loop of adjusting control circuit, to improve the working condition of power conversion circuit so that power work is in the state most having.

Description

A kind of Vehicular charger boosting servomechanism

【Technical field】

It is the utility model is related to export the new-energy automobile charging technique field of wide-voltage range, more particularly to a kind of vehicle-mounted Charger boosting servomechanism.

【Background technology】

With the evolution and development of switch power technology, Switching Power Supply have developed into miniaturization, high frequency, high efficiency, The features such as high power density.Due to many advantages of Switching Power Supply itself, communication, electric power, vapour have been widely used in it The fields such as vehicle, industry, consumer electronics, household electrical appliance.

It supports, with the new-energy automobile industry developed, to have developed into national strategy now and newly produce as state key Industry, new-energy automobile have come into high-speed development period, and the new-energy automobile charging technique at the same time driven is also risen in this world. With the development of new-energy automobile technology, the charging technique of new-energy automobile also becomes increasingly abundant, and charge voltage range requires more next Wider, charging current requirement is increasing, and the charge requirement of new-energy automobile is adapted to this.

It has been done step-by-step in conventional lead acid electri forklift field and has substituted phase control rectifier power supply with high frequency switch power Trend all realizes high frequency switch power charge function in novel lithium battery electrical forklift field.

Above-mentioned involved charging field, majority using lithium battery technology, therefore for charging equipment need compared with Wide output voltage range meets the charge requirement of lithium battery with this.It is filled for a kind of common 3.3Kw or 6.6Kw is vehicle-mounted For motor, output voltage range is generally required from 220VDC to 430VDC, and output power generally uses constant power output, so as to In giving battery optimal charging curve.

Vehicular charger circuit form is that prime carries out power factor (PF) using APFC (hereinafter referred to as booster circuit) circuit at present Correction and top voltage stabilizing, rear class are defeated only with increasing when Width funtion exports using DC/DC isolation variation output setting voltages Go out filter inductance to reduce inductance stress.The problems such as due to the limitation of charger own vol, high dynamic rate density feature, output All there is some problem in the variation coefficient that nearly 1.6 times of voltage, either full-bridge soft-switching technology or LLC harmonic technologies.

For the vehicle power supply of Width funtion output, in full-bridge soft-switching topological structure, according to the spy of power supply voltage-second balance Property, when low-voltage output, outputting inductance B duty pressures are bigger, and magnetic core is easily saturated, therefore cause inductance technique for coiling complicated Change, simultaneously because when low-voltage output, it is smaller with sky, the problems such as overall efficiency is low, electromagnetic compatibility is poor can be caused；For LLC Topological structure, the resonance impedance characteristic of LC is adjusted according to resonant frequency, therefore can be posed a big pressure to resonant inductance, is needed simultaneously Sealing in prodigious inductance could realize that Width funtion exports, and in off-resonance point, overall efficiency can reduce, while resonance compensation Parameter changes, and reliability reduces etc..

【Utility model content】

In view of the foregoing, in order to solve the limitation and usability problems of above-mentioned Switching Power Supply Width funtion output, having must A kind of Vehicular charger boosting servomechanism is provided, after the utility model is the sampled circuit of switch power source output voltage, is led to After crossing control circuit adjusting so that boost voltage changes, and due to the feedback effect of closed loop, is accounted for have adjusted late-class circuit The size of empty ratio, finally reduces the working stress of outputting inductance, improves the efficiency of complete machine, improves the electromagnetic compatibility etc. of complete machine Problem.The utility model is adjusted by the closed loop of adjusting control circuit, to improve the working condition of power conversion circuit so that Power work is in the state most having.

In order to achieve the above objectives, technical solution used by the utility model is：A kind of Vehicular charger of the utility model Boost servomechanism, include power conversion circuit and control to adjust circuit, which is characterized in that the power conversion circuit it is defeated Enter end and exchange connection with the external world, output end is connect with lithium battery；The power conversion circuit includes exchange input filter circuit, defeated Enter current rectifying and wave filtering circuit, APFC booster circuits, DC/DC power conversion circuits, output filter circuit, the input filter circuit, Input rectifying filter circuit, APFC booster circuits, DC/DC power conversion circuits, output filter circuit, and be sequentially connected；It is described Control to adjust circuit include Vout voltage sampling, secondary Mcu circuits, communicate photoelectric coupled circuit, Hv sample circuits, primary Mcu circuits, Boosting adjustment circuit, Pwm control circuits；The Vout voltage sampling, secondary Mcu circuits, communication optocoupler are sequentially connected；It is described first Grade Hv sample circuits, Mcu circuits, boosting adjustment circuit, Pwm control circuits are sequentially connected；The APFC booster circuits are adopted with Hv Sample circuit connects；The output filter circuit is connected with Vout voltage sampling；The primary Mcu circuits connect with photoelectric coupled circuit is communicated It connects.

Preferably, the Vout sample circuits are made of resistance capacitance potential-divider network.

Preferably, the Hv sample circuits are made of resistance capacitance potential-divider network.

Preferably, the boosting adjustment circuit realizes proportional integration by resistance capacitance.

Preferably, the Pwm control circuits are made of special pulse width modulating chip, driving FET Mos.

The utility model has the advantages that：

1, boosting servo technology disclosed in the utility model, circuit is simple, and control is simple, the reality without special circuit Show it and exports regulatory function.

2, the utility model realizes that boost voltage Hv's is servo-actuated using voltage regulator circuit is risen；Output voltage is produced with boost voltage Raw proportionality coefficient, adjusts the size of duty ratio, to complete the servo-actuated purpose of boosting.

3, the utility model can be efficiently solved by this boosting servo technology existing for Width funtion output switch power source Problem improves the Stability and dependability of product.The servomechanism of the utility model ensure that output voltage and boost voltage value It adjusts in a certain proportion, to effectively increase the variation range of output voltage, ensures accounting for when normal output Sky is than maximizing so that outputting inductance volume does not change substantially, and inductance technique for coiling is simplified, and efficiency and its electromagnetic compatibility are all Obtained good solution.

【Description of the drawings】

Fig. 1 is the basic principle schematic of the utility model.

Fig. 2 is the circuit connection diagram of the utility model.

Fig. 3 is the control and regulation circuit diagram of the utility model.

Description of the drawings：

Switching power circuit 100；Exchange input L terminals 101；Exchange input N-terminal 102；Power conversion circuit D103；Directly Flow output+terminal 104；Direct current output-terminal 105；Control circuit adjusts 106；Exchange input filter circuit 201；AC rectification Filter circuit 202；APFC booster circuits 203；DC/DC power conversion circuits 204；Output filter circuit 205；Vout samplings 206； Secondary Mcu207；Communicate optocoupler 208；Hv samplings 209；Primary Mcu210；Boosting adjustment circuit 211；Pwm control circuits 212； Vout sampling networks 301；Boosting adjustment network 302；Hv sampling networks 303；Pwm pulsewidth modulations network 304；Boost Mos circuits 305；Primary single-chip network 306.

【Specific implementation mode】

Please refer to Fig.1~3, in a kind of better embodiment of the utility model, as Fig. 1 the utility model boosting with Dynamic circuit 100, power supply complete machine 100 realize the isolated transmission function of being input to output power, use 103 and are used as power conversion Part, 106 circuits are to control to adjust circuit；Exchange input L is connect with 101 terminals of the Switching Power Supply 100, exchange input N It is connect with 102 terminals of the Switching Power Supply 100；Direct current output+terminal 104 of the Switching Power Supply 100 and lithium battery+company It connects, direct current output-terminal 105 of the Switching Power Supply 100 is connect with lithium battery-.

The control and regulation circuit 105 of the Switching Power Supply 100 of the utility model has carried out the sampling of inputoutput data respectively Work, after the scale operation to data, has adjusted the relevant parameter of power conversion circuit, so as to improve power circuit Working condition.

Referring to Fig. 2, the ac filter circuit 201 of the utility model mainly filters net by the MEI that inductance and capacitance form Network, the interference for mainly preventing the extraneous other users equipment of power supply itself interference and preventing external interference signals to itself, exchange filter Wave circuit 201 connects AC rectification filter circuit 202, and current rectifying and wave filtering circuit 202 is mainly realized is rectified into arteries and veins by sinusoidal ac Dynamic direct current, booster circuit 203, DC/DC translation circuits 204, output filter circuit 205 are sequentially connected.Alternating current 220V ac is defeated Enter voltage after input filter circuit, given current rectifying and wave filtering circuit, the 310VDC direct currents of pulsation is rectified into, by APFC After power factor correction circuit, become stable 420VDC direct currents, after being converted by DC/DC isolating transformers, is organized into The direct current of 430VDC gives lithium battery and charges.

Vout voltage described in the utility model sampling 206, the sampling 209 of Hv voltages, secondary Mcu207, communicate optocoupler 208, Primary Mcu210, liter voltage regulator circuit 211, Pwm adjust circuit 212 and are sequentially connected, and constitute control and regulation circuit, realize output The function that constant pressure and flow is adjusted.

Output voltage sampling circuit 206 described in the utility model realizes that the sampling to output voltage, the voltage after sampling are sent Secondary Mcu circuits 207 are arrived, secondary Mcu circuits 207 realize the communication work(with primary Mcu circuits 210 by isolation optocoupler 208 Can, give output Vout to primary Mcu at this time.

Boosting Hv voltages described in the utility model detect Hv voltage values by Hv sample circuits 209, and Hv voltage values are given Primary Mcu, primary Mcu by Hv voltage values and the secondary Vout voltage value sent relatively after, give and control to adjust 211 1, circuit Control coefrficient.

The power supply described in the utility model controls to adjust circuit 211 by the adjusting to Pwm circuits 212, realizes pair The adjusting of booster circuit duty ratio, and then the regulatory function of boost voltage is realized, the variation of Hv voltages can cause DC/DC circuits The variation of duty ratio, therefore the comparison with boost voltage is completed by the sampling of output voltage, complete the servo-actuated purpose of boosting.

As shown in figure 3, the Principles of Regulation that boosting described in the utility model is servo-actuated, when lithium battery voltage is in lossing state By taking 220VDC as an example, Switching Power Supply will be exported by clamped for 220VDC, at this time by output voltage by point of sampling network 301 Secondary single chip circuit is given after pressure, secondary microcontroller is sent to primary Mcu306 by communicating optocoupler, at this time Hv sampling networks 303 give the Hv voltages of sampling to primary Mcu306, after the scale operation of Mcu306, pass through the boosting of capacitance resistance composition Regulating networks 302 generate a control coefrficient, so as to realize the feedback control to Pwm generation circuits 304, Pwm circuits 304 Feedback control finally have adjusted the voltage value of Hv, the negative-feedback of a closed loop is completed.After boost voltage Hv is servo-actuated, DC/DC work( Rate translation circuit can adjust its duty ratio size so that outputting inductance stress reduces, and power-efficient improves, and Electro Magnetic Compatibility changes It is kind.

Vehicle power supply boosting servo technology disclosed in the utility model, circuit is simple, and control is simple, is not necessarily to special electricity Road reduces development cycle and the cost of product.According to the variation of output voltage Vout, the proportion adjustment of boost voltage Hv is carried out Entire closed loop feedback is completed, so that the duty ratio of DC/DC power conversions is adjusted, output inductor stress is made to drop Low, efficiency and electromagnetic compatibility are improved.

Above description is the detailed description for the preferable possible embodiments of the utility model, but embodiment is not limited to The patent claim of the utility model, the same changes or modifications completed under the technical spirit suggested by all the utility model Change, should all belong to the covered the scope of the claims of the utility model.

Claims (5)

1. The servomechanism 1. a kind of Vehicular charger boosts includes power conversion circuit and control and regulation circuit, which is characterized in that The input terminal of the power conversion circuit exchanges connection with the external world, and output end is connect with lithium battery；The power conversion circuit packet Include exchange input filter circuit, input rectifying filter circuit, APFC booster circuits, DC/DC power conversion circuits, output filtered electrical Road, the input filter circuit, input rectifying filter circuit, APFC booster circuits, DC/DC power conversion circuits, output filtering Circuit, and be sequentially connected；The control and regulation circuit includes Vout voltage sampling, secondary Mcu circuits, communication photoelectric coupled circuit, Hv Sample circuit, primary Mcu circuits, boosting adjustment circuit, Pwm control circuits；The Vout voltage sampling, is led to secondary Mcu circuits Letter photoelectric coupled circuit is sequentially connected；The Hv sample circuits, primary Mcu circuits, boosting adjustment circuit, Pwm control circuits connect successively It connects；The APFC booster circuits are connect with Hv sample circuits；The output filter circuit is connected with Vout voltage sampling；It is described first Grade Mcu circuits are connect with communication photoelectric coupled circuit.
2. 2. a kind of Vehicular charger boosting servomechanism according to claim 1, which is characterized in that the Vout voltage sampling It is made of resistance capacitance potential-divider network.
3. 3. a kind of Vehicular charger boosts servomechanism according to claim 1, which is characterized in that the Hv sample circuits by Resistance capacitance potential-divider network is constituted.
4. 4. a kind of Vehicular charger boosting servomechanism according to claim 1, which is characterized in that the boosting adjustment circuit Proportional integration is realized by resistance capacitance.
5. 5. a kind of Vehicular charger boosting servomechanism according to claim 1, which is characterized in that the Pwm control circuits It is made of special pulse width modulating chip, driving FET Mos.