CN103066881A - Switching circuit of phase shift and limited bipolar control manner and control method thereof - Google Patents
Switching circuit of phase shift and limited bipolar control manner and control method thereof Download PDFInfo
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- CN103066881A CN103066881A CN2013100106105A CN201310010610A CN103066881A CN 103066881 A CN103066881 A CN 103066881A CN 2013100106105 A CN2013100106105 A CN 2013100106105A CN 201310010610 A CN201310010610 A CN 201310010610A CN 103066881 A CN103066881 A CN 103066881A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a switching circuit of a phase shift and limited bipolar control manner and a control method of the switching circuit of the phase shift and limited bipolar control manner. The switching circuit comprises a digital signal processor (DSP) circuit, an output voltage and current feedback circuit, a pulse-width modulation (PWM) driving switching circuit, a PWM driving circuit and a full-bridge power circuit. The DSP circuit is respectively connected with the output voltage and current feedback circuit, the PWM driving switching circuit and the PWM driving circuit. The full-bridge power circuit is respectively connected with the output voltage and current feedback circuit and the PWM driving circuit. The PWM driving switching circuit is further connected with the PWM driving circuit. The control method comprises that whether a phase shift control manner or a limited bipolar control manner is used is judged by the DSP circuit according to output power. The switching circuit of the phase shift and limited bipolar control manner and the control method of the switching circuit of the phase shift and limited bipolar control manner solve the problems that the full-bridge power circuit has ring current, is serious in insulated gate bipolar translator (IGBT) heating, small in range of soft switching and the like under phase shift control while load is heavy, and are capable of avoiding the problem that the full-bridge power circuit is large in consumption under the limited bipolar control when load is empty and light.
Description
Technical field
The present invention relates to a kind of high frequency switch power technical field, be specifically related to commutation circuit and the control method thereof of a kind of phase shift and finite both control mode.
Background technology
When the voltage and current quota of power switch pipe is identical, the power output of converter is directly proportional with the quantity of used power switch pipe usually, therefore at present in middle high-power DC power supply is used, usually adopt full-bridge converter, full-bridge converter comprises full-bridge inverter and output rectifier and filter.Full-bridge inverter adopts phase-shift control mode and finite both control mode usually, and full-bridge inverter realizes that under the finite both control mode soft-switching range is wide, efficient is high, but underloading, no-load loss are very serious, and power device is had certain damage; And the scope that under phase-shift control mode, realizes soft switch narrower, the circulation phenomenon arranged, increased the weight of the IGBT fever phenomenon, but with respect to the finite both control mode, full-bridge inverter underloading and when unloaded under phase-shift control mode, loss is less.
Summary of the invention
Purpose of the present invention is announced commutation circuit and the control method thereof of a kind of phase shift and finite both control mode, utilize the hardware topology structure basically identical characteristics of full bridge power circuit under finite both control mode and phase-shift control mode, conversion by two kinds of control modes, when having solved full bridge power circuit underloading and zero load, the large problem of loss under the finite both control mode has also solved the problems such as the full bridge power circuit is realized that under phase-shift control mode soft-switching range is little, had circulation, heating is serious.
For addressing the above problem, the invention provides following technical scheme:
The commutation circuit of a kind of phase shift and finite both control mode comprises that dsp processor circuit, output voltage and current feedback circuit, PWM drive commutation circuit, PWM drive circuit and full bridge power circuit; Described dsp processor circuit drives commutation circuit with output voltage and current feedback circuit, PWM respectively, the PWM drive circuit is connected; Described full bridge power circuit is connected with the PWM drive circuit with output voltage and current feedback circuit respectively; Described PWM drives commutation circuit and also is connected with the PWM drive circuit; Described dsp processor circuit is for generation of 6 road pwm signals, and decides according to output voltage and output current the full bridge power circuit is adopted phase-shift control mode or finite both control mode, provides simultaneously and selects signal to drive commutation circuit to PWM; Described PWM drives commutation circuit and according to the selection signal that the dsp processor circuit provides pwm signal is selected, to realize the selection of phase-shift control mode and finite both control mode; Described PWM drive circuit is used for the pwm signal that the dsp processor circuit produces is amplified to the power switch pipe that is enough to drive the full bridge power circuit; Described output voltage and current feedback circuit are used for output voltage and the output current of full bridge power circuit are sampled, and offer the dsp processor circuit.
Further, first via pwm signal, Third Road pwm signal, the five road pwm signal and the six road pwm signal form 4 road required pwm signals under the phase-shift control mode in 6 road pwm signals of described dsp processor circuit generation; The the second road pwm signal, the four road pwm signal, the five road pwm signal and the six road pwm signal form 4 road required pwm signals under the finite both control mode; The five road pwm signal and the six road pwm signal are the shared pwm signal of phase-shift control mode and finite both control mode, directly offer the PWM drive circuit after being produced by the dsp processor circuit.
Further, described PWM drives commutation circuit and selects 1 data selector to form by two homophases 2, the first input end of the first data selector is connected to the first via pwm signal pin of dsp processor circuit, and the first input end of the second data selector is connected to the Third Road pwm signal pin of dsp processor circuit; The second input of the first data selector is connected to the second road pwm signal pin of dsp processor circuit, and the second input of the second data selector is connected to the four road pwm signal pin of dsp processor circuit; The data selection pin of the first data selector and the second data selector all is connected to the selection signal output pin of dsp processor circuit, be used for switching the pwm signal under phase-shift control mode and the finite both control mode, select the signal output cycle of signal output pin identical with the pwm signal cycle that the dsp processor circuit produces, and synchronously.
Further, described full bridge power circuit is the DC/DC full-bridge converter, comprises full-bridge inverter and output rectifier and filter.
The control method of the commutation circuit of above-mentioned a kind of phase shift and finite both control mode is: described dsp processor circuit calculates power output according to output voltage and the output current of the full bridge power circuit of output voltage and current feedback circuit collection;
When the full bridge power circuit is in phase-shift control mode, the first setting power value that the dsp processor circuit is realized point with the soft switch of full bridge power circuit under the power output calculating value of full bridge power circuit and the finite both control mode relatively, when the calculated value of power output during greater than the first setting power value, the selection signal output pin output low level of dsp processor circuit is given the data selection pin of the first data selector and the second data selector, PWM drives commutation circuit and changes finite both PWM driver output over to, and namely PWM drives commutation circuit and selects output the second road pwm signal and the four road pwm signal; When if the calculated value of power output is not more than the first setting power value, the full bridge power circuit still is in phase-shift control mode;
When the full bridge power circuit is in the finite both control mode, the dsp processor circuit compares the second setting power value of full bridge power circuit underloading point under the power output calculating value of full bridge power circuit and the phase-shift control mode, if the calculated value of power output is less than the second setting power value, the selection signal output pin output high level of dsp processor circuit is given the data selection pin of the first data selector and the second data selector, PWM drives commutation circuit and changes phase shifting control PWM driver output over to, and namely PWM drives commutation circuit and selects output first via pwm signal and Third Road pwm signal; When if the calculated value of power output is not less than the second setting power value, the full bridge power circuit still is in the finite both control mode.
Described the first setting power value is greater than the second setting power value, and the difference of the first setting power value and the second setting power value satisfies PWM and drive signal and frequently do not switched, and system is steadily exported.
The selection signal output pin of described dsp processor circuit is all exported high level when the dsp processor circuit has just begun to work on power, PWM drives commutation circuit and selects output first via pwm signal and Third Road pwm signal, and the pwm signal that is when namely the full bridge power circuit begins to work on power under the phase-shift control mode drives.
Finite both control technology with respect to present the invention has the beneficial effects as follows:
1, circuit is simple and practical, by the control to the pwm signal of dsp processor, can realize that phase-shift PWM drives the bumpless transfer of signal when initial in the PWM cycle with finite both PWM driving signal, does not affect system works;
2, the full bridge power circuit adopts phase-shift control mode when underloading or zero load, has solved the serious problem of loss under the finite both control mode; The full bridge power circuit adopts the finite both control mode when heavy duty, problems such as realizing when also solving phase-shift control mode that soft-switching range is little, have circulation loss, the IGBT heating is large.
3, utilize full bridge power circuit PWM under phase-shift control mode and finite both control mode to drive the characteristics of signal, share two-way PWM and drive signal, saved the capacity of dsp processor.
Description of drawings
Fig. 1 is the phase shift of execution mode and the commutation circuit structured flowchart of finite both control mode.
Fig. 2 is 4 road pwm signal schematic diagrames under the phase-shift control mode of execution mode.
Fig. 3 is 4 road pwm signal schematic diagrames under the finite both control mode of execution mode.
Fig. 4 is that the PWM of execution mode drives commutation circuit figure.
Fig. 5 is the control method flow chart of the commutation circuit of the phase shift of execution mode and finite both control mode.
Embodiment
Below in conjunction with accompanying drawing the present invention further is described in detail.
As shown in Figure 1, the commutation circuit of a kind of phase shift and finite both control mode comprises that dsp processor circuit, output voltage and current feedback circuit, PWM drive commutation circuit, PWM drive circuit and full bridge power circuit; Described dsp processor circuit drives commutation circuit with output voltage and current feedback circuit, PWM respectively, the PWM drive circuit is connected; Described full bridge power circuit is connected with the PWM drive circuit with output voltage and current feedback circuit respectively; Described PWM drives commutation circuit and also is connected with the PWM drive circuit; Described dsp processor circuit is for generation of 6 road pwm signals, and decides according to output voltage and output current the full bridge power circuit is adopted phase-shift control mode or finite both control mode, provides simultaneously and selects signal to drive commutation circuit to PWM; Described PWM drives commutation circuit and according to the selection signal that the dsp processor circuit provides pwm signal is selected, to realize the selection of phase-shift control mode and finite both control mode; Described PWM drive circuit is used for the pwm signal that the dsp processor circuit produces is amplified to the power switch pipe that is enough to drive the full bridge power circuit; Described output voltage and current feedback circuit are used for output voltage and the output current of full bridge power circuit are sampled, and offer the dsp processor circuit.
As shown in Figure 2, first via pwm signal PWMA, Third Road pwm signal PWMB, the five road pwm signal PWME and the six road pwm signal PWMF form 4 road required pwm signals under the phase-shift control mode in 6 road pwm signals of described dsp processor circuit generation; As shown in Figure 3, the second road pwm signal PWMB, the four road pwm signal PWMD, the five road pwm signal PWME and the six road pwm signal PWMF form 4 road required pwm signals under the finite both control mode; The five road pwm signal PWME and the six road pwm signal PWMF are the shared pwm signal of phase-shift control mode and finite both control mode, directly offer the PWM drive circuit after being produced by the dsp processor circuit.
As shown in Figure 4, described PWM drives commutation circuit and selects 1 data selector Y1, Y2 to form by two homophases 2, the first input end A2 that the first input end A1 of the first data selector Y1 is connected to first via pwm signal pin 1, the second data selector Y2 of dsp processor circuit is connected to the Third Road pwm signal pin 3 of dsp processor circuit; The second input B2 that the second input B1 of the first data selector Y1 is connected to the second road pwm signal pin 2, the second data selector Y2 of dsp processor circuit is connected to the four road pwm signal pin 4 of dsp processor circuit; The selection signal output pin 7 that the data selection pin SEL1 of the first data selector Y1 and the second data selector Y2, SEL2 all are connected to the dsp processor circuit, be used for switching the pwm signal under phase-shift control mode and the finite both control mode, select the signal output cycle of signal output pin 7 identical with the pwm signal cycle that the dsp processor circuit produces, and synchronously.
The equal ground connection of gating end GN2 of the gating end GN1 of described the first data selector Y1 and the second data selector Y2.
As preferably, described the first data selector Y1 and the second data selector Y2 can select data selector 74157.
Described full bridge power circuit is the DC/DC full-bridge converter, comprises full-bridge inverter and output rectifier and filter.
As shown in Figure 5, the control method of the commutation circuit of above-mentioned a kind of phase shift and finite both control mode is as follows:
The dsp processor circuit calculates power output according to output voltage and the output current of the full bridge power circuit of output voltage and current feedback circuit collection;
When the full bridge power circuit is in phase-shift control mode, the first setting power value that the dsp processor circuit is realized point with the soft switch of full bridge power circuit under the power output calculating value of full bridge power circuit and the finite both control mode relatively, when the calculated value of power output during greater than the first setting power value, selection signal output pin 7 output low levels of dsp processor circuit are given the data selection pin SEL1 of the first data selector Y1 and the second data selector Y2, SEL2, PWM drives commutation circuit and changes finite both PWM driver output over to, and namely PWM drives commutation circuit and selects output the second road pwm signal PWMB and the four road pwm signal PWMD; When if the calculated value of power output is not more than the first setting power value, the full bridge power circuit still is in phase-shift control mode;
When the full bridge power circuit is in the finite both control mode, the dsp processor circuit compares the second setting power value of full bridge power circuit underloading point under the power output calculating value of full bridge power circuit and the phase-shift control mode, if the calculated value of power output is less than the second setting power value, the selection signal output pin 7 output high level of dsp processor circuit are given the data selection pin SEL1 of the first data selector Y1 and the second data selector Y2, SEL2, PWM drives commutation circuit and changes phase shifting control PWM driver output over to, and namely PWM drives commutation circuit and selects output first via pwm signal PWMA and Third Road pwm signal PWMC; When if the calculated value of power output is not less than the second setting power value, the full bridge power circuit still is in the finite both control mode.
Above-mentioned the first setting power value is greater than the second setting power value, and the difference of the first setting power value and the second setting power value satisfies PWM and drive signal and frequently do not switched, and system is steadily exported.
The selection signal output pin 7 of dsp processor circuit is all exported high level when the dsp processor circuit has just begun to work on power, PWM drives commutation circuit and selects output first via pwm signal PWMA and Third Road pwm signal PWMC, and the pwm signal that is when namely the full bridge power circuit begins to work on power under the phase-shift control mode drives.
As seen, by the control to the pwm signal of dsp processor, can realize that phase-shift PWM drives the bumpless transfer of signal when initial in the PWM cycle with finite both PWM driving signal, does not affect system works.The full bridge power circuit adopts phase-shift control mode when underloading or zero load, solved the serious problem of loss under the finite both control mode; The full bridge power circuit adopts the finite both control mode when heavy duty, problems such as realizing when also solving phase-shift control mode that soft-switching range is little, have circulation loss, the IGBT heating is large.
Those skilled in the art can make various modifications to this specific embodiment or replenish or adopt similar mode to substitute under the prerequisite of principle of the present invention and essence, but these are changed and all fall into protection scope of the present invention.Therefore the technology of the present invention scope is not limited to above-described embodiment.
Claims (7)
1. the commutation circuit of a phase shift and finite both control mode is characterized in that comprising that dsp processor circuit, output voltage and current feedback circuit, PWM drive commutation circuit, PWM drive circuit and full bridge power circuit; Described dsp processor circuit drives commutation circuit with output voltage and current feedback circuit, PWM respectively, the PWM drive circuit is connected; Described full bridge power circuit is connected with the PWM drive circuit with output voltage and current feedback circuit respectively; Described PWM drives commutation circuit and also is connected with the PWM drive circuit; Described dsp processor circuit is for generation of 6 road pwm signals, and decides according to output voltage and output current the full bridge power circuit is adopted phase-shift control mode or finite both control mode, provides simultaneously and selects signal to drive commutation circuit to PWM; Described PWM drives commutation circuit and according to the selection signal that the dsp processor circuit provides pwm signal is selected, to realize the selection of phase-shift control mode and finite both control mode; Described PWM drive circuit is used for the pwm signal that the dsp processor circuit produces is amplified to the power switch pipe that is enough to drive the full bridge power circuit; Described output voltage and current feedback circuit are used for output voltage and the output current of full bridge power circuit are sampled, and offer the dsp processor circuit.
2. the commutation circuit of a kind of phase shift according to claim 1 and finite both control mode is characterized in that first via pwm signal, Third Road pwm signal, the five road pwm signal and the six road pwm signal form 4 road required pwm signals under the phase-shift control mode in 6 road pwm signals that described dsp processor circuit produces; The the second road pwm signal, the four road pwm signal, the five road pwm signal and the six road pwm signal form 4 road required pwm signals under the finite both control mode; The five road pwm signal and the six road pwm signal are the shared pwm signal of phase-shift control mode and finite both control mode, directly offer the PWM drive circuit after being produced by the dsp processor circuit.
3. the commutation circuit of a kind of phase shift according to claim 1 and finite both control mode, it is characterized in that described PWM drives commutation circuit and selects 1 data selector to form by two homophases 2, the first input end of the first data selector is connected to the first via pwm signal pin of dsp processor circuit, and the first input end of the second data selector is connected to the Third Road pwm signal pin of dsp processor circuit; The second input of the first data selector is connected to the second road pwm signal pin of dsp processor circuit, and the second input of the second data selector is connected to the four road pwm signal pin of dsp processor circuit; The data selection pin of the first data selector and the second data selector all is connected to the selection signal output pin of dsp processor circuit, be used for switching the pwm signal under phase-shift control mode and the finite both control mode, select the signal output cycle of signal output pin identical with the pwm signal cycle that the dsp processor circuit produces, and synchronously.
4. the commutation circuit of a kind of phase shift according to claim 1 and finite both control mode is characterized in that described full bridge power circuit is the DC/DC full-bridge converter, comprises full-bridge inverter and output rectifier and filter.
5. the control method that is used for the commutation circuit of each described a kind of phase shift of claim 1-4 and finite both control mode, it is characterized in that, described dsp processor circuit calculates power output according to output voltage and the output current of the full bridge power circuit of output voltage and current feedback circuit collection;
When the full bridge power circuit is in phase-shift control mode, the first setting power value that the dsp processor circuit is realized point with the soft switch of full bridge power circuit under the power output calculating value of full bridge power circuit and the finite both control mode relatively, when the calculated value of power output during greater than the first setting power value, the selection signal output pin output low level of dsp processor circuit is given the data selection pin of the first data selector and the second data selector, PWM drives commutation circuit and changes finite both PWM driver output over to, and namely PWM drives commutation circuit and selects output the second road pwm signal and the four road pwm signal; When if the calculated value of power output is not more than the first setting power value, the full bridge power circuit still is in phase-shift control mode;
When the full bridge power circuit is in the finite both control mode, the dsp processor circuit compares the second setting power value of full bridge power circuit underloading point under the power output calculating value of full bridge power circuit and the phase-shift control mode, if the calculated value of power output is less than the second setting power value, the selection signal output pin output high level of dsp processor circuit is given the data selection pin of the first data selector and the second data selector, PWM drives commutation circuit and changes phase shifting control PWM driver output over to, and namely PWM drives commutation circuit and selects output first via pwm signal and Third Road pwm signal; When if the calculated value of power output is not less than the second setting power value, the full bridge power circuit still is in the finite both control mode.
6. the control method of the commutation circuit of described a kind of phase shift and finite both control mode according to claim 5 is characterized in that described the first setting power value is greater than the second setting power value.
7. the control method of the commutation circuit of described a kind of phase shift and finite both control mode according to claim 5, the selection signal output pin that it is characterized in that described dsp processor circuit is all exported high level when the dsp processor circuit has just begun to work on power, PWM drives commutation circuit and selects output first via pwm signal and Third Road pwm signal, and the pwm signal that is when namely the full bridge power circuit begins to work on power under the phase-shift control mode drives.
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| CN2013100106105A CN103066881A (en) | 2013-01-12 | 2013-01-12 | Switching circuit of phase shift and limited bipolar control manner and control method thereof |
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| CN2013100106105A CN103066881A (en) | 2013-01-12 | 2013-01-12 | Switching circuit of phase shift and limited bipolar control manner and control method thereof |
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| CN103457477A (en) * | 2013-09-23 | 2013-12-18 | 武汉中原电子集团有限公司 | Control method of phase shift soft switching converter |
| CN108390570A (en) * | 2018-02-12 | 2018-08-10 | 南京舜唐科技有限公司 | The control method and circuit of dcdc converter |
| CN109756133A (en) * | 2019-03-14 | 2019-05-14 | 青岛贝斯克电子有限公司 | One kind is with the variable PWM controller of load |
| WO2019204999A1 (en) * | 2018-04-25 | 2019-10-31 | Huawei Technologies Co., Ltd. | Method and apparatus for control of optical phase shifters in an optical device |
| CN110753417A (en) * | 2019-11-15 | 2020-02-04 | 天津光电通信技术有限公司 | Control method for controlling bipolar LED lamp by using max7219 |
| CN110838801A (en) * | 2018-08-17 | 2020-02-25 | 现代自动车株式会社 | Inverter system for vehicle |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103457477A (en) * | 2013-09-23 | 2013-12-18 | 武汉中原电子集团有限公司 | Control method of phase shift soft switching converter |
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| CN110838801A (en) * | 2018-08-17 | 2020-02-25 | 现代自动车株式会社 | Inverter system for vehicle |
| CN109756133A (en) * | 2019-03-14 | 2019-05-14 | 青岛贝斯克电子有限公司 | One kind is with the variable PWM controller of load |
| CN110753417A (en) * | 2019-11-15 | 2020-02-04 | 天津光电通信技术有限公司 | Control method for controlling bipolar LED lamp by using max7219 |
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Application publication date: 20130424 |