CN103746419B - Vehicle-mounted charger circuit - Google Patents
Vehicle-mounted charger circuit Download PDFInfo
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- CN103746419B CN103746419B CN201310744216.4A CN201310744216A CN103746419B CN 103746419 B CN103746419 B CN 103746419B CN 201310744216 A CN201310744216 A CN 201310744216A CN 103746419 B CN103746419 B CN 103746419B
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Abstract
The invention discloses a vehicle-mounted charger circuit, which has two working modes, i.e. a high-voltage charging mode and a low-voltage charging mode. When the vehicle-mounted charger circuit works in the high-voltage charging mode, the vehicle-mounted charger circuit respectively charges high-voltage and low-voltage batteries, a PWM (Pulse Width Modulation) controller outputs PWM control signals with frequency which is higher than resonant frequency to control a switching tube, direct-current high-voltage power is output through a first winding on the secondary side of a transformer, a first rectifier circuit and a third capacitor to charge high-voltage batteries and direct-current low-voltage power is output through a second winding on the secondary side of the transformer, a second rectifier circuit, a second inductor and a fourth capacitor to charge low-voltage batteries; when the vehicle-mounted charger circuit works in the low-voltage charging mode, the PWM controller controls the switching tube to be turned off and high-voltage battery energy is output to charge low-voltage batteries through the transformer. The vehicle-mounted charger circuit disclosed by the invention can realize independent voltage control during full-bridge dual-winding output.
Description
Technical field
The present invention relates to electronic (pure electronic, hybrid power) automotive engineering, particularly to a kind of onboard charger circuit.
Background technology
Along with new-energy automobile progresses into market, market is increasing to the demand of onboard charger, at electronic (pure electricity
Dynamic, hybrid power) in automobile, high-tension battery charger (Charger) and low tension battery charger (Converter) are
Crucial electrical equipment, is each responsible for charging to high-tension battery and low tension battery, and both is generally individually present in car load,
It is respectively completed respective function.The most independent charger arranged is increasingly difficult to meet car load factory to high integration, low one-tenth
This requirement.Along with car load factory is more and more urgent for the demand of high power density, high integration charger, a kind of integrated
The New charger (Charcon) of high-tension battery charger (Charger) and low tension battery charger (Converter) concept
Being suggested, it can simplify hardware circuit, improve power density and reduce into while both functions integrated
This.
The common circuit of existing high-tension battery charger (Charger) is as shown in Figure 1；Existing low tension battery charger
(Converter) as shown in Figure 2 and Figure 3, two schemes all use LLC full-bridge or phase-shifting full-bridge to open up to two kinds of common circuit
Flutter.
In DC converter, LLC circuit generally uses VFC, and phase-shifting full-bridge uses PWM(pulse width modulation)
Control.In multiple-channel output full-bridge topology, due to the same magnetic core of Transformer Winding multiplexing, exist between its output voltage
Coupled relation, presents the integral multiple relation of the turn ratio each other, it is impossible to realize independent control.Due to high and low pressure battery electricity
Pressure excursion is bigger, it is desirable to the output voltage of charger can change in certain limit, if simply that full-bridge is secondary
Limit multichannel winding coupled is in same magnetic core coil, it is impossible to meet requirement.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of onboard charger circuit, can realize when full-bridge double winding exports
Voltage independently controls.
For solving above-mentioned technical problem, the onboard charger circuit that the present invention provides, it includes multiple-channel output full-bridge conversion electricity
Road, PWM controller；
Described multiple-channel output full-bridge circuit, including the first electric capacity, the first switching tube, second switch pipe, the 3rd switch
Pipe, the 4th switching tube, the first inductance, the second electric capacity, transformator, the first rectification circuit, the 3rd electric capacity, the second rectification
Circuit, the 4th electric capacity, the second inductance；
Described first electric capacity, two ends, as two inputs of multiple-channel output full-bridge circuit, are used for connecing DC voltage；
Described first switching tube closes between two inputs that pipe is serially connected in multiple-channel output full-bridge circuit with described second；
Described 3rd switching tube closes between two inputs that pipe is serially connected in multiple-channel output full-bridge circuit with the described 4th；
Described transformator, secondary includes the first winding, two windings of the second winding；
Described first inductance, the second electric capacity and transformer primary side winding are serially connected in the first switching tube with the second junction point closing pipe
Between the 3rd switching tube junction point with the 4th pass pipe；
The two ends of described first winding, connect two inputs of the first rectification circuit；
Described 3rd electric capacity, is connected between described first rectification circuit two outfan, for output voltage to high-tension battery；
The two ends of described second winding, connect the second rectification circuit two input respectively；
Described second inductance, one terminates described second rectification circuit output plus terminal, and another terminates described 4th electric capacity one end；
Described 4th electric capacity, the described second rectification circuit output negative terminal of another termination, for output voltage to low tension battery；
Described PWM controller, be used for exporting pwm control signal to described first switching tube, second switch pipe, the 3rd open
Guan Guan, the control end of the 4th switching tube；
Described PWM controller, under high-voltage charging pattern, the frequency of the pwm control signal of output is more than
L1 is the first inductance, and C2 is the second electric capacity；Under low pressure charge mode, output pwm control signal controls the first switch
Pipe, second switch pipe, the 3rd switching tube and the 4th switching tube turn off.
It is also preferred that the left described first rectification circuit, it it is the bridge rectifier of four diode compositions；
Described second rectification circuit, is the bridge rectifier of four diode compositions.
It is also preferred that the left described first rectification circuit, it it is the bridge rectifier of four diode compositions；
Described second rectification circuit, including the first diode, the second diode；
The two ends of described second winding, connect the first diode, one end of the second diode respectively；
First diode, the other end of the second diode, connect described second rectification circuit output negative terminal；
The centre tap of described second winding, connects described second rectification circuit output plus terminal.
It is also preferred that the left onboard charger circuit, also include the 3rd rectification circuit, circuit of power factor correction, power factor school
Positive control device；
Described circuit of power factor correction, including the 3rd inductance, the 3rd diode, the 5th switching tube；
Described 3rd inductance, one terminates the direct current output plus terminal of described 3rd rectification circuit, and another terminates described three or two pole
The anode of pipe；
The negative terminal of described 3rd diode, connects the positive input terminal of described multiple-channel output full-bridge circuit；
Described 5th switching tube, is connected on negative defeated with described multiple-channel output full-bridge circuit of the anode of described 3rd diode
Enter between end；
Described power factor correction controller, for outputting a control signal to the control end of described 5th switching tube, at high pressure
Under charge mode, control the 5th switching tube and be switched on or switched off；Under low pressure charge mode, control the 5th switching tube and disconnect.
It is also preferred that the left described multiple-channel output full-bridge circuit, also include the 5th electric capacity；
Described 5th electric capacity is connected between transformer primary side winding two ends, described pwm control signal, and frequency is more thanL1 is the first inductance, and C2 is the second electric capacity, and C5 is the 5th electric capacity.
The onboard charger circuit of the present invention, integrated high voltage battery charger (Charger) and low tension battery charger
(Converter), high-tension battery charger (Charger) and low tension battery charger (Converter) Transformer Winding
The same magnetic core of multiplexing, transformer secondary winding shares a magnetic core, improves transformer utilization factor, reduce cost and
Volume；A DSP(Digital Signal Processing can be respectively adopted) control chip, one is used for realizing PFC
(PFC) control of circuit, another is for realizing the control of multiple-channel output full-bridge circuit, and control circuit obtains letter
Changing, voltage when can realize the output of full-bridge double winding independently controls.
Accompanying drawing explanation
In order to be illustrated more clearly that technical scheme, below the accompanying drawing used required for the present invention is made simple Jie
Continue, it should be apparent that, the accompanying drawing in describing below is only some embodiments of the present invention, for ordinary skill
From the point of view of personnel, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the common circuit of high-tension battery charger；
Fig. 2 is the conventional LLC full-bridge circuit of low tension battery charger；
Fig. 3 is the conventional phase whole-bridging circuit of low tension battery charger；
Fig. 4 is the onboard charger circuit first embodiment circuit diagram of the present invention；
Fig. 5 is onboard charger circuit the second embodiment circuit diagram of the present invention；
Fig. 6 is onboard charger circuit the 3rd embodiment circuit diagram of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the technical scheme in the present invention is carried out clear, complete description, it is clear that described
Embodiment is a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, ability
All other embodiments that territory those of ordinary skill is obtained on the premise of not making creative work, broadly fall into this
The scope of bright protection.
Embodiment one
Onboard charger circuit, as shown in Figure 4, Figure 5, including multiple-channel output full-bridge circuit, PWM(pulse width
Modulation) controller；
Described multiple-channel output full-bridge circuit, including the first electric capacity C1, the first switching tube M1, second switch pipe M2,
3rd switching tube M3, the 4th switching tube M4, the first inductance L1, the second electric capacity C2, transformator, the first rectification circuit,
3rd electric capacity C3, the second rectification circuit, the 4th electric capacity C4, the second inductance L2；
Described first electric capacity C1, two ends, as two inputs of multiple-channel output full-bridge circuit, are used for connecing DC voltage；
Described first switching tube M1 with described second close pipe M2 be serially connected in multiple-channel output full-bridge circuit two inputs it
Between；
Described 3rd switching tube M3 with described 4th close pipe M4 be serially connected in multiple-channel output full-bridge circuit two inputs it
Between；
Described transformator, secondary includes the first winding, two windings of the second winding；
Described first inductance L1, the second electric capacity C2 and transformer primary side winding are serially connected in the first switching tube M1 and close pipe with second
The junction point of M2 closes between the junction point of pipe M4 to the 3rd switching tube M3 the same 4th；
The two ends of described first winding, connect two inputs of the first rectification circuit；
Described 3rd electric capacity C3, is connected between described first rectification circuit two outfan, for output voltage to high-tension battery；
The two ends of described second winding, connect the second rectification circuit two input respectively；
Described second inductance L2, one terminates described second rectification circuit output plus terminal, and another terminates described 4th electric capacity C4
One end；
Described 4th electric capacity C4, the described second rectification circuit output negative terminal of another termination, the 4th electric capacity C4 is used for exporting electricity
It is pressed onto low tension battery；
Described PWM controller, is used for exporting PWM(pulse width modulation) control signal to the first switching tube M1, second
Switching tube M2, the 3rd switching tube M3, the control end of the 4th switching tube M4；
Described PWM controller, under high-voltage charging pattern, the pwm frequency signal of output is more than
L1 is the first inductance, and C2 is the second electric capacity；Under low pressure charge mode, output pwm control signal controls the first switch
Pipe M1, second switch pipe M2, the 3rd switching tube M3 and the 4th switching tube M4 turn off.
In onboard charger circuit shown in Fig. 4, the first rectification circuit, is the bridge rectifier of four diode compositions；
Second rectification circuit, is the bridge rectifier of four diode compositions.
In onboard charger circuit shown in Fig. 5, the first rectification circuit, is the bridge rectifier of four diode compositions；
Second rectification circuit, including the first diode Q1, the second diode Q2；The two ends of described second winding, connect respectively
One diode Q1, one end of the second diode Q2；First diode Q1, the other end of the second diode Q2, meet institute
State the second rectification circuit output negative terminal；The centre tap of described second winding L2, connects described second rectification circuit and is just exporting
End.
It is also preferred that the left onboard charger circuit, also include the 3rd rectification circuit, PFC (PFC) circuit, power
Factor correcting (PFC) controller；3rd rectification circuit, for realizing the alternating voltage rectification to DC voltage, in order to
In the voltage current transformation of rear class, the 3rd rectification circuit is usually bridge rectifier；Circuit of power factor correction, power
Factor correcting controller, for realizing the correction of power factor (PF), to meet laws and regulations requirement；
Described circuit of power factor correction, including the 3rd inductance L3, the 3rd diode Q3, the 5th switching tube M5；
Described 3rd inductance L3, one terminates the direct current output plus terminal of described 3rd rectification circuit, another termination the described 3rd 2
The anode of pole pipe Q3；
The negative terminal of described 3rd diode Q3, connects the positive input terminal of described multiple-channel output full-bridge circuit；
Described 5th switching tube, is connected on anode the bearing with described multiple-channel output full-bridge circuit of described 3rd diode Q3
Between input；
Described PFC (PFC) controller, for outputting a control signal to the control end of described 5th switching tube,
Under high-voltage charging pattern, control the 5th switching tube and be switched on or switched off, to adjust output to the conversion of described multiple-channel output full-bridge
The DC voltage size of circuit；Under low pressure charge mode, control the 5th switching tube and disconnect.
The onboard charger circuit of embodiment one, has two kinds of mode of operations, high-voltage charging pattern and low pressure charge mode.
When external city is electrically accessed, and onboard charger circuit works in high-voltage charging pattern, electric main is rectified, filtering
Charging to respectively with conversion high and low pressure battery, described PWM controller output frequency is more than resonant frequency's
Pwm control signal, controls the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube switch, by becoming
Depressor secondary the first winding and the first rectification circuit, the 3rd electric capacity C3 output high direct voltage VH are to high-tension battery charging, logical
Cross transformer secondary the second winding and the second rectification circuit, the second inductance L2, the 4th electric capacity C4 output DC low-voltage VL
Charge to low tension battery, owing to pwm frequency signal is more than resonant frequencyAnd second winding defeated
Going out to export DC low-voltage VL after the second inductance L2, the 4th electric capacity C4 filtering to low tension battery, thus the direct current exported is low
The size only dutycycle with pwm control signal of pressure VL has relation, it is possible to DC low-voltage VL Yu PWM realizing output is controlled
The frequency decoupling of signal processed；And transformer secondary the first winding exports direct current by the first rectification circuit, the 3rd electric capacity C3
High pressure VH size, not only the dutycycle with pwm control signal has relation, and also the frequency with pwm control signal has relation；
So, under high-voltage charging pattern, by the dutycycle of pwm control signal, the regulation of frequency, within the specific limits
Adjust high direct voltage VH and the size of DC low-voltage VL of output respectively, charge to respectively high and low pressure battery；High pressure fills
Under power mode, multiple-channel output full-bridge circuit uses LLC full-bridge mapped structure, and LLC can be compared to phase-shifting full-bridge
The wider Sofe Switch realizing switching tube, has some superiority at the aspect of performance such as efficiency, EMC；
When high-tension battery charging terminates, and onboard charger circuit works in low pressure charge mode, the first switching tube, second open
Guan Guan, the 3rd switching tube, the 4th switching tube, the 5th switching tube turn off, and high-tension battery energy passes through transformator to low tension
Charging in pond, multiple-channel output full-bridge circuit works in phase-shifting full-bridge state.
The onboard charger circuit of embodiment one, integrated high voltage battery charger (Charger) and low tension battery charger
(Converter), high-tension battery charger (Charger) and low tension battery charger (Converter) Transformer Winding
The same magnetic core of multiplexing, transformer secondary winding shares a magnetic core, improves transformer utilization factor, reduce cost and
Volume；A DSP(Digital Signal Processing can be respectively adopted) control chip, one is used for realizing PFC
(PFC) control of circuit, another is for realizing the control of multiple-channel output full-bridge circuit, and control circuit obtains letter
Changing, voltage when can realize the output of full-bridge double winding independently controls.
Embodiment two
Onboard charger circuit as shown in Figure 6, the difference with circuit shown in embodiment one Fig. 5 is, described multiple-channel output
Full-bridge circuit, also includes the 5th electric capacity C5；
Described 5th electric capacity C5 is connected between transformer primary side winding two ends, described pwm control signal, and frequency is more than
L1 is the first inductance, and C2 is the second electric capacity, and C5 is the 5th electric capacity.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention
Within principle, any modification, equivalent substitution and improvement etc. done, within should be included in the scope of protection of the invention.
Claims (5)
1. an onboard charger circuit, it is characterised in that include multiple-channel output full-bridge circuit, PWM controller；
Described multiple-channel output full-bridge circuit, including the first electric capacity, the first switching tube, second switch pipe, the 3rd switch
Pipe, the 4th switching tube, the first inductance, the second electric capacity, transformator, the first rectification circuit, the 3rd electric capacity, the second rectification
Circuit, the 4th electric capacity, the second inductance；
Described first electric capacity, two ends, as two inputs of multiple-channel output full-bridge circuit, are used for connecing DC voltage；
Described first switching tube is serially connected between two inputs of multiple-channel output full-bridge circuit with described second switch pipe；
Described 3rd switching tube is serially connected in described 4th switching tube between two inputs of multiple-channel output full-bridge circuit；
Described transformator, secondary includes the first winding, two windings of the second winding；
Described first inductance, the second electric capacity and transformer primary side winding are serially connected in the connection with second switch pipe of first switching tube
O'clock to the 3rd switching tube with the 4th switching tube junction point between；
The two ends of described first winding, connect two inputs of the first rectification circuit；
Described 3rd electric capacity, is connected between described first rectification circuit two outfan, for output voltage to high-tension battery；
Without inductance component between the same first rectification circuit positive output end of high-tension battery anode；
The two ends of described second winding, connect the second rectification circuit two input respectively；
Described second inductance, one terminates described second rectification circuit output plus terminal, and another terminates described 4th electric capacity one end；
Described 4th electric capacity, the described second rectification circuit output negative terminal of another termination, for output voltage to low tension battery；
Onboard charger circuit, also includes a PWM controller；
Described PWM controller, be used for exporting pwm control signal to described first switching tube, second switch pipe, the 3rd open
Guan Guan, the control end of the 4th switching tube；
Described PWM controller, under high-voltage charging pattern, the frequency of the pwm control signal of output is more than
L1 is the first inductance, and C2 is the second electric capacity；Under low pressure charge mode, output pwm control signal controls the first switch
Pipe, second switch pipe, the 3rd switching tube and the 4th switching tube turn off.
Onboard charger circuit the most according to claim 1, it is characterised in that
Described first rectification circuit, is the bridge rectifier of four diode compositions；
Described second rectification circuit, is the bridge rectifier of four diode compositions.
Onboard charger circuit the most according to claim 1, it is characterised in that
Described first rectification circuit, is the bridge rectifier of four diode compositions；
Described second rectification circuit, including the first diode, the second diode；
The two ends of described second winding, connect the first diode, one end of the second diode respectively；
First diode, the other end of the second diode, connect described second rectification circuit output negative terminal；
The centre tap of described second winding, connects described second rectification circuit output plus terminal.
Onboard charger circuit the most according to claim 1, it is characterised in that
Onboard charger circuit, also includes the 3rd rectification circuit, circuit of power factor correction, power factor correction controller；
Described circuit of power factor correction, including the 3rd inductance, the 3rd diode, the 5th switching tube；
Described 3rd inductance, one terminates the direct current output plus terminal of described 3rd rectification circuit, and another terminates described three or two pole
The anode of pipe；
The negative terminal of described 3rd diode, connects the positive input terminal of described multiple-channel output full-bridge circuit；
Described 5th switching tube, is connected on negative defeated with described multiple-channel output full-bridge circuit of the anode of described 3rd diode
Enter between end；
Described power factor correction controller, for outputting a control signal to the control end of described 5th switching tube, at high pressure
Under charge mode, control the 5th switching tube and be switched on or switched off；Under low pressure charge mode, control the 5th switching tube and disconnect.
5. an onboard charger circuit, it is characterised in that include multiple-channel output full-bridge circuit, PWM controller；
Described multiple-channel output full-bridge circuit, including the first electric capacity, the first switching tube, second switch pipe, the 3rd switch
Pipe, the 4th switching tube, the first inductance, the second electric capacity, transformator, the first rectification circuit, the 3rd electric capacity, the second rectification
Circuit, the 4th electric capacity, the second inductance, the 5th electric capacity；
Described first electric capacity, two ends, as two inputs of multiple-channel output full-bridge circuit, are used for connecing DC voltage；
Described first switching tube is serially connected between two inputs of multiple-channel output full-bridge circuit with described second switch pipe；
Described 3rd switching tube is serially connected in described 4th switching tube between two inputs of multiple-channel output full-bridge circuit；
Described transformator, secondary includes the first winding, two windings of the second winding；
Described first inductance, the second electric capacity and transformer primary side winding are serially connected in the connection with second switch pipe of first switching tube
O'clock to the 3rd switching tube with the 4th switching tube junction point between；
The two ends of described first winding, connect two inputs of the first rectification circuit；
Described 3rd electric capacity, is connected between described first rectification circuit two outfan, for output voltage to high-tension battery；
Without inductance component between the same first rectification circuit positive output end of high-tension battery anode；
The two ends of described second winding, connect the second rectification circuit two input respectively；
Described second inductance, one terminates described second rectification circuit output plus terminal, and another terminates described 4th electric capacity one end；
Described 4th electric capacity, the described second rectification circuit output negative terminal of another termination, for output voltage to low tension battery；
Described 5th electric capacity is connected between transformer primary side winding two ends；
Onboard charger circuit, also includes a PWM controller；
Described PWM controller, be used for exporting pwm control signal to described first switching tube, second switch pipe, the 3rd open
Guan Guan, the control end of the 4th switching tube；
Described PWM controller, under high-voltage charging pattern, the frequency of the pwm control signal of output is more thanL1 is the first inductance, and C2 is the second electric capacity, and C5 is the 5th electric capacity；Under low pressure charge mode,
Output pwm control signal controls the first switching tube, second switch pipe, the 3rd switching tube and the 4th switching tube and turns off.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310744216.4A CN103746419B (en) | 2013-12-30 | 2013-12-30 | Vehicle-mounted charger circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310744216.4A CN103746419B (en) | 2013-12-30 | 2013-12-30 | Vehicle-mounted charger circuit |
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| CN103746419A CN103746419A (en) | 2014-04-23 |
| CN103746419B true CN103746419B (en) | 2017-01-11 |
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