CN204068709U - The discrete phase shifting angle control device of phase-shifting full-bridge DC-DC converter - Google Patents
The discrete phase shifting angle control device of phase-shifting full-bridge DC-DC converter Download PDFInfo
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- CN204068709U CN204068709U CN201420379113.2U CN201420379113U CN204068709U CN 204068709 U CN204068709 U CN 204068709U CN 201420379113 U CN201420379113 U CN 201420379113U CN 204068709 U CN204068709 U CN 204068709U
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- phase
- control signal
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- generator
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Abstract
The utility model discloses a kind of discrete phase shifting angle control device of phase-shifting full-bridge DC-DC converter, controller produces two-way with Dead Time and the signal P of complementation
1, P
2, as the drive pulse signal of two switching tubes on leading-bridge; Meanwhile, controller is respectively to two paths of signals P
1, P
2carry out phase shift process, produce the signal P that two groups of phase shifting angles are different
3H, P
3Hand P
3L, P
3L, according to the output state of switch converters, controller directly at two groups of signals, P
3H, P
3Hand P
3L, P
3L, in select suitable signal to export, as effective drive pulse signal of two switching tubes on lagging leg, to realize the control to phase-shifting full-bridge DC-DC converter.The advantage of this invention is: control loop is simple and reliable, and without the need to compensating network, transient response speed is fast.
Description
Technical field
The utility model relates to the discrete phase shifting angle control device of phase-shifting full-bridge DC-DC converter.
Background technology
For improving frequency and the power density of converter, the switching loss of switching tube must be reduced, therefore there has been proposed resonant type soft-switch technology; Resonant type soft-switch technology, by increasing resonant element in circuit, makes switching tube realize no-voltage conducting or zero-current switching, thus reduces switching loss; But resonant type soft-switch technology generally needs to adopt frequency modulating method (Frequency Modulation, FM) to control, and therefore there is the shortcoming such as control mode complexity, output filter difficult design.
The nineties, there has been proposed phase shifting full bridge soft switch converter technology; Phase-shifting full-bridge switch converters by changing phase shifting angle θ, realizes the control to converter output voltage on the one hand; Utilize the parasitic parameter of circuit self on the other hand, by arranging Dead Time t
d, make switching tube be operated in Sofe Switch state; Phase shifting full bridge soft switch technology takes full advantage of main circuit parasitic parameter, reduces the electric current and voltage stress of power switch pipe, thus obtain a wide range of applications while reducing the switching loss of power switch pipe.
Utility model content
The purpose of this utility model is to provide a kind of discrete phase shifting angle control device of phase-shifting full-bridge DC-DC converter.
The utility model is the method solving its technology: a kind of device realizing above phase-shifting full-bridge DC-DC converter control method, be made up of converter and discrete phase shifting angle controller, discrete phase shifting angle controller comprises voltage sample and comparison circuit, control impuls generator, phase shifting angle generator, the first phase-shifted control signal generator 1, second phase-shifted control signal generator 2, control signal selector and drive circuit.Its design feature is: control impuls generator, phase shifting angle generator are all connected with the first phase-shifted control signal generator 1, second phase-shifted control signal generator 2; Voltage sample is all connected with control signal selector with comparison circuit, the first phase-shifted control signal generator 1, second phase-shifted control signal generator 2; Control impuls generator, control signal selector are all connected with drive circuit.
Compared with prior art, the beneficial effects of the utility model are:
One, relative to the PWM control technology of existing phase-shifting full-bridge DC-DC converter, adopt converter of the present invention when load changing, due to without the need to compensating network, therefore there is transient response ability faster.
Two, controller directly with output voltage compared with reference voltage, without the need to compensating network, simplify control loop design, enhance the stability of a system, improve transient response speed.
Accompanying drawing explanation
Fig. 1 is implement device structured flowchart of the present invention.
Fig. 2 is the electrical block diagram of the embodiment of the present invention.
Fig. 3 is in the embodiment of the present invention, output voltage and drive singal corresponding relation schematic diagram.
Fig. 4 is the time-domain-simulation oscillogram of the embodiment of the present invention under steady state conditions, a reactor in a certain period.
Fig. 5 is the time-domain-simulation oscillogram of phase-shifted full-bridge converter when load changing of the embodiment of the present invention.
Fig. 6 is the time-domain-simulation oscillogram of phase-shifted full-bridge converter when input voltage mutation of the embodiment of the present invention.
In Fig. 4: (a) is converter output voltage and reference voltage waveform; B drive singal P that () exports for controller
1, P
2, P
3, P
4waveform; C () is the voltage waveform of converter former limit AB point-to-point transmission; D () is the voltage waveform of converter secondary MN point-to-point transmission.
Fig. 4 simulated conditions is as follows: input voltage V
in=200V, output reference voltage V
reffrequency f=the 25kHz of=60V, transformer voltage ratio K=1, transformer leakage inductance Lp=2uH, static exciter inductance L m=10uH, secondary resonant inductance L=2.6mH, output capacitance C=200 μ F, output voltage ESR=100 Ω, load resistance R=100 Ω, control impuls generator output two pulse signals, two phase shifting angles that phase shifting angle generator produces are respectively θ
h=4 μ s, θ
l=15 μ s.
Embodiment
Fig. 1 illustrates, the specific embodiment of the present invention is: the discrete phase shifting angle control method of phase-shifting full-bridge DC-DC converter and device thereof, and its discrete phase shifting angle controller is made up of voltage sample and comparison circuit, control impuls generator, phase shifting angle generator, the first phase-shifted control signal generator 1, second phase-shifted control signal generator 2, control signal selector, drive circuit; Control impuls generator, phase shifting angle generator are all connected with the first phase-shifted control signal generator 1, second phase-shifted control signal generator 2; Voltage sample is all connected with control signal selector with comparison circuit, the first phase-shifted control signal generator 1, second phase-shifted control signal generator 2; Control impuls generator, control signal selector are all connected with drive circuit;
The output voltage of phase-shifting full-bridge DC-DC converter through voltage sample with comparison circuit compared with reference voltage, its output is connected with the input of control signal selector, is directly used in the selection to control impuls; Described control impuls generator exports two-way with Dead Time and the control signal of complementation: signal P
1, signal P
2, as two switching tube S on leading-bridge
1and S
2control signal; Described phase shifting angle generator is for generation of two groups of time-delay signal θ
hand θ
l; Described the first phase-shifted control signal generator 1 couple of signal P
2carry out phase shift process, produce switching tube S
3drive singal P
3pulse control signal P
3Hand P
3L; Described the second phase-shifted control signal generator 2 couples of signal P
1carry out phase shift process, produce switching tube S
4drive singal P
4control wave P
4Hand P
4L; Pulse signal P
3H, P
3L, P
4Hand P
4Linput control signal selector, and produce effective control signal P according to control impuls selective rule
3, P
4; Control signal P
1, P
2, P
3, P
4four switching tube S of phase-shifting full-bridge DC-DC converter are driven respectively through overdrive circuit
1, S
2, S
3, S
4.
Fig. 2, Fig. 3 show the application of discrete phase shifting angle control technology in phase-shifting full-bridge DC-DC converter; Fig. 3 shows the two paths of signals P that control impuls generator exports
1, P
2waveform V
p1, V
p2, V
p3H, V
p3Lbe respectively the control wave P produced by the first phase-shifted control signal generator 1
3H, P
3Lvoltage waveform, V as seen from the figure
p3Hand V
p3Lrespectively with V
p2difference phase shifting angle θ
hand θ
l; V
p4Hand V
p4Lbe respectively the control wave P produced by the second phase-shifted control signal generator 2
4H, P
4Lvoltage waveform, V as seen from the figure
p4Hand V
p4Lrespectively with V
p1difference phase shifting angle θ
hand θ
l; As shown in Figure 3, arrive moment, i.e. each switch periods start time in each clock pulse, when the output voltage sampled is less than reference voltage, select P
3H, P
4Has effective lagging leg switching tube driving pulse, by V
aB, V
mNvoltage waveform known, now the duty ratio of converter is comparatively large, and output voltage rises; On the contrary, when the output voltage sampled is higher than reference voltage, select P
3L, P
4Las effective lagging leg switching tube driving pulse, by V
aB, V
mNvoltage waveform known, now the duty of converter is smaller, output voltage decline.
Carry out time-domain-simulation analysis with PSIM software to the method for this example, result is as follows:
Fig. 4 is the work wave of converter when rated operation emulating the above-mentioned control method of employing and the control device thereof obtained; The transverse axis of Fig. 4 is the time (ms), and the longitudinal axis of (a) is output voltage (V), and the longitudinal axis of (b) is switching tube S
1, S
2, S
3, S
4drive singal V
p1, V
p2, V
p3, V
p4, the longitudinal axis of (c) is the voltage (V) of converter former limit AB point-to-point transmission, and the longitudinal axis of (d) is the voltage (V) of converter secondary MN point-to-point transmission; Can find out in the diagram, discrete phase shifting angle control technology can realize the control of the output voltage to phase-shifting full-bridge DC-DC converter, and converter output voltage ripple is about 17mV.
Fig. 5 adopts the output voltage dynamic response time-domain-simulation oscillogram of phase-shifting full-bridge DC-DC converter of the present invention when catastrophe appears in load; Transverse axis is the time (ms), and the longitudinal axis of (a) is output voltage (V), and the longitudinal axis of (b) is output current (A).In Fig. 5, when 15ms, load is by 0.1A Spline smoothing to 1.2A, and adopt transient response speed of the present invention very fast, almost do not have response time and side-play amount, system enters stable state immediately.Visible employing phase-shifting full-bridge of the present invention DC-DC converter has good load dynamic characteristic.
Fig. 6 adopts the output voltage dynamic response time-domain-simulation oscillogram of phase-shifting full-bridge DC-DC converter of the present invention when catastrophe appears in input voltage.Transverse axis is the time (ms), and the longitudinal axis of (a) is output voltage (V), and the longitudinal axis of (b) is input voltage (V).In Fig. 6, when 15ms, input voltage is by 100V Spline smoothing to 200V, and transient response speed when adopting the present invention to undergo mutation to input voltage is very fast, and almost do not have response time and side-play amount, system enters stable state immediately.
The present invention controls, except the phase-shifting full-bridge DC-DC converter in above-described embodiment, also to can be used for other phase-shifting full-bridge DC-DC converter except can be used for, and two-way phase-shifting full-bridge DC-DC converter.
Claims (3)
1. a discrete phase shifting angle control device for phase-shifting full-bridge DC-DC converter, is made up of phase-shifting full-bridge DC-DC converter and discrete phase shifting angle controller; Described discrete phase shifting angle controller is made up of voltage sample and comparison circuit, control impuls generator, phase shifting angle generator, the first phase-shifted control signal generator 1, second phase-shifted control signal generator 2, control signal selector and drive circuit; Its design feature is: control impuls generator, phase shifting angle generator are all connected with the first phase-shifted control signal generator 1, second phase-shifted control signal generator 2; Voltage sample is all connected with control signal selector with comparison circuit, the first phase-shifted control signal generator 1, second phase-shifted control signal generator 2; Control impuls generator, control signal selector are all connected with drive circuit.
2. the discrete phase shifting angle control device of phase-shifting full-bridge DC-DC converter according to claim 1, is characterized in that, described control impuls generator exports two-way with Dead Time and the pulse signal of complementation: signal P
1, signal P
2, as the control signal of two switching tubes on leading-bridge; First phase-shifted control signal generator 1, second phase-shifted control signal generator 2 is respectively to signal P
1, signal P
2do phase shift process, namely to signal P
1phase shift θ
hand θ
l, produce pulse signal P
3H, P
3L, to signal P
2phase shift θ
hand θ
l, produce pulse signal P
4H, P
4L, control signal selector selects P according to the control impuls selective rule of phase-shifting full-bridge DC-DC converter
3Hand P
4Hor P
3Land P
4Las the control signal of two switching tubes on lagging leg.
3. the discrete phase shifting angle control device of phase-shifting full-bridge DC-DC converter according to claim 1, the selection principle of its phase shifting angle is: when P selected by controller
3Hand P
4Hduring control signal as two switching tubes on lagging leg, namely when controller phase shifting angle is θ
htime, should ensure that the output voltage of converter raises; When P selected by controller
3Land P
4Lduring control signal as two switching tubes on lagging leg, namely when controller phase shifting angle is θ
ltime, should ensure that the output voltage of converter reduces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420379113.2U CN204068709U (en) | 2014-07-10 | 2014-07-10 | The discrete phase shifting angle control device of phase-shifting full-bridge DC-DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420379113.2U CN204068709U (en) | 2014-07-10 | 2014-07-10 | The discrete phase shifting angle control device of phase-shifting full-bridge DC-DC converter |
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| Publication Number | Publication Date |
|---|---|
| CN204068709U true CN204068709U (en) | 2014-12-31 |
Family
ID=52210150
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420379113.2U Expired - Fee Related CN204068709U (en) | 2014-07-10 | 2014-07-10 | The discrete phase shifting angle control device of phase-shifting full-bridge DC-DC converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115085553A (en) * | 2021-03-16 | 2022-09-20 | 宁德时代新能源科技股份有限公司 | Bidirectional DC/DC converter, control method and device thereof, and storage medium |
-
2014
- 2014-07-10 CN CN201420379113.2U patent/CN204068709U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115085553A (en) * | 2021-03-16 | 2022-09-20 | 宁德时代新能源科技股份有限公司 | Bidirectional DC/DC converter, control method and device thereof, and storage medium |
| CN115085553B (en) * | 2021-03-16 | 2023-12-22 | 宁德时代新能源科技股份有限公司 | Bidirectional DC/DC converter, control method and device thereof, and storage medium |
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|---|---|---|---|
| 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: 20141231 Termination date: 20170710 |
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| CF01 | Termination of patent right due to non-payment of annual fee |