CN103441657A - Method for producing improved ZVT PWM converter auxiliary drives - Google Patents
Method for producing improved ZVT PWM converter auxiliary drives Download PDFInfo
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- CN103441657A CN103441657A CN2013102751778A CN201310275177A CN103441657A CN 103441657 A CN103441657 A CN 103441657A CN 2013102751778 A CN2013102751778 A CN 2013102751778A CN 201310275177 A CN201310275177 A CN 201310275177A CN 103441657 A CN103441657 A CN 103441657A
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- switch tube
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Abstract
The invention relates to a method for producing improved ZVT PWM converter auxiliary drives. According to the method, monostable circuits are utilized to perform phase position movement and adjustment on main switch tube driving signals, therefore, auxiliary switch tube drives capable of being adjusted in phase position and pulse width can be obtained, and work requirements of improved ZVT PWM converters are met. As is shown in the figure, according to the functional block diagram of the application method, the processing flow includes the steps that firstly, through the first monostable circuit, a pulse signal adjustable in pulse width is obtained by the utilization of signal falling edges after master drive differential; then, the auxiliary drives are obtained through the second monostable circuit. The phase position and the pulse width of each auxiliary drive can both be adjusted, auxiliary switch tubes of the improved ZVT PWM converters can be opened in advance of a main switch tube, the zero voltage condition is created for opening the main switch tube, then, the auxiliary switch tube is closed, the main switch tube works in a mode same as PWM, and the work requirements of the improved ZVT PWM converters are met.
Description
Technical field
The invention belongs to the special power supply technology, is a kind of production method of modified model ZVT pwm converter process auxiliary drive.。
Background technology
Modified model ZVT pwm converter is by auxiliary resonant net, for main switch is created the ZVS(zero voltage switch) condition, main switch turns on and off under zero-voltage state, has greatly reduced the reactive loss of main switch.And auxiliary switch itself is also zero current turning-on and no-voltage shutoff, in soft on off state, main fly-wheel diode is also to complete nature to turn-off under the zero current condition.
During normal operation, auxiliary switch is open-minded prior to main switch, is the condition of creating no-voltage of opening of main switch, and main switch is opened rear auxiliary switch and turn-offed, and main switch is operated under the pattern the same with PWM, for load provides power and voltage.Therefore, auxiliary switch is just worked very short a period of time within the whole work period, and there is phase difference in the driving of main switch and auxiliary switch.
Thinking of the present invention is to utilize monostable circuit, and main driving signal is carried out to phase shift and adjustment, thereby produces all adjustable process auxiliary drive of phase place and width, meets the work requirements of modified model ZVT pwm converter.
Summary of the invention
Content of the present invention is to provide a kind of production method of modified model ZVT pwm converter process auxiliary drive.At first, by first monostable circuit, utilize the signal trailing edge after main driving differential to obtain a pulse signal that pulse duration is adjustable; Then, then by second monostable circuit obtain process auxiliary drive.Regulate the potentiometer in two monostable circuits, can adjust phase place and pulsewidth that auxiliary switch drives, thereby produce needed modified model ZVT pwm converter process auxiliary drive.
Below in conjunction with accompanying drawing, technical solution of the present invention is described in detail.
The accompanying drawing explanation
The workflow diagram that Fig. 1 is the application process of monostable circuit in converter process auxiliary drive generation circuit.
The circuit theory diagrams that Fig. 2 is the application process of monostable circuit in converter process auxiliary drive generation circuit.
Embodiment
Monostable circuit of the present invention produces the concrete implementation step of application process in circuit referring to Fig. 1 in the converter process auxiliary drive:
1. by first monostable circuit, utilize the signal trailing edge after main driving differential to obtain a pulse signal that pulse duration is adjustable;
2. by second monostable circuit, utilize the pulse signal trailing edge after differential to obtain process auxiliary drive;
3. regulate phase place and the pulse duration of process auxiliary drive, to meet the work requirements of converter;
The application process circuit theory diagrams of monostable circuit of the present invention in converter process auxiliary drive generation circuit are referring to Fig. 2, and in figure, N1 and N2 are 555 timers.
1. main driving signal is after differential circuit C1, R2,2 pin by N1 are introduced, when voltage signal becomes low level (being not more than 5V) by high level (being greater than 10V), the 3 pin output high level of N1, first monostable circuit enters temporary stable state, and capacitor C 3 is by R4, R6 charging, when the 6 pin voltages of N1 during higher than 10V, 3 pin of N1 become low level by high level, after this capacitor C 3 electric discharges, and first monostable circuit enters stable state.The effect of V1 is when voltage signal becomes high level by low level, and 2 pin of N1 are clamped to 15V.
2. in like manner, when the pulse signal of the 3 pin outputs of N1 after differential circuit C2, R3,2 pin by N2 are introduced, when voltage signal becomes low level (being not more than 5V) by high level (being greater than 10V), the 3 pin output high level of N2, second monostable circuit enters temporary stable state, capacitor C 4 is by R5, R7 charging, when the 6 pin voltages of N2 during higher than 10V, 3 pin of N2 become low level by high level, after this capacitor C 4 electric discharges, second monostable circuit enters stable state, and the pulse signal of the 3 pin outputs of N2 is exactly process auxiliary drive.The effect of V2 is when pulse signal becomes high level by low level, and 2 pin of N2 are clamped to 15V.
3. regulator potentiometer R6 just can change the width of the 3 pin output pulse signals of N1.Because when 3 pin of N1 become low level by high level, 3 pin of N2 become high level by low level, produce process auxiliary drive, so regulator potentiometer R6 can adjust the phase place of process auxiliary drive.Regulator potentiometer R7 can change the width of the 3 pin output pulse signals of N2, so regulator potentiometer R7 can adjust the phase place of process auxiliary drive.Regulator potentiometer R6, R7, phase place and the pulsewidth of adjustment process auxiliary drive, to meet the work requirements of modified model ZVT pwm converter.
Claims (4)
1. the production method of a modified model ZVT pwm converter process auxiliary drive, it is characterized in that: at first by first differential circuit by main driving pulse differential, this pulse is sent in first monostable circuit, obtain a pulse signal that pulse duration is adjustable, recycle second differential circuit by the pulse signal differential, then by second monostable circuit, thereby produce, obtain all adjustable process auxiliary drive of impulse phase and width.
2. the generation circuit of a modified model ZVT pwm converter process auxiliary drive, it is characterized in that: by two differential circuits and two monostable circuits, formed, main driving signal is successively by first differential circuit, first monostable circuit, second differential circuit and second monostable circuit, thus the generation process auxiliary drive.
3. according to the generation circuit of the described a kind of modified model ZVT pwm converter process auxiliary drive of claim 2, it is characterized in that: main driving pulse enters first monostable circuit by first differential circuit, its output pulse signal, regulator potentiometer R6 can the regulating impulse signal pulsewidth, thereby realize the adjustment to the process auxiliary drive phase place.
4. according to the generation circuit of the described a kind of modified model ZVT pwm converter process auxiliary drive of claim 2, it is characterized in that: the pulse signal of first monostable circuit output enters second monostable circuit by second differential circuit, the pulse signal of its output is process auxiliary drive, regulator potentiometer R7 can regulate the pulsewidth of this pulse signal, thereby realizes the adjustment to the process auxiliary drive width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102751778A CN103441657A (en) | 2013-07-03 | 2013-07-03 | Method for producing improved ZVT PWM converter auxiliary drives |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102751778A CN103441657A (en) | 2013-07-03 | 2013-07-03 | Method for producing improved ZVT PWM converter auxiliary drives |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103441657A true CN103441657A (en) | 2013-12-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102751778A Pending CN103441657A (en) | 2013-07-03 | 2013-07-03 | Method for producing improved ZVT PWM converter auxiliary drives |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060164871A1 (en) * | 2004-04-12 | 2006-07-27 | Seiichi Takahashi | Switching power supply circuit |
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2013
- 2013-07-03 CN CN2013102751778A patent/CN103441657A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060164871A1 (en) * | 2004-04-12 | 2006-07-27 | Seiichi Takahashi | Switching power supply circuit |
Non-Patent Citations (2)
| Title |
|---|
| 梁文仪等: "ZVT-PWM有源功率因数校正器的实现", 《电气应用》 * |
| 电子产品世界: "555定时器组成的延迟脉冲发生器电路", 《电子产品世界》 * |
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Application publication date: 20131211 |