CN2884686Y - Power cell auxiliary power source starting circuit of high voltage converter - Google Patents
Power cell auxiliary power source starting circuit of high voltage converter Download PDFInfo
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- CN2884686Y CN2884686Y CN 200620001981 CN200620001981U CN2884686Y CN 2884686 Y CN2884686 Y CN 2884686Y CN 200620001981 CN200620001981 CN 200620001981 CN 200620001981 U CN200620001981 U CN 200620001981U CN 2884686 Y CN2884686 Y CN 2884686Y
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Abstract
The utility model relates to a high-voltage frequency converter power unit auxiliary power supply startup circuit, which comprises: an electric charge storage circuit which is used for store electric charges transmitted via high-voltage input circuit; a pulse width modulating control chip energy storage power supply which is used for provide startup power supply for pulse width modulating control chip; an electric charge transfer circuit, used for transfer the electric charges to the pulse width modulating control chip energy storage power supply, the input thereof is connected to the output of the electric charge circuit and the output thereof is connected to the pulse width modulating control chip energy storage power supply; an output voltage judgment circuit, used for control the start/stop of the electric charge transfer circuit, the output thereof is connected to the control terminal of the electric charge transfer circuit. The utility model has advantages of that: 1. the circuit loss can be greatly reduced by introduction of charging resistor with high-resistance; 2. the startup current is provided with pulse current by electric charges stored on mass-capacity capacitor, the magnitude of which is almost unlimited; 3. the circuit is simple, which can be achieved with low cost.
Description
Technical field
The utility model relates to the start-up circuit of the accessory power supply of high voltage transducer power unit, belongs to the switch power technology field.
Background technology
In recent years, the application of unit series connection type high voltage frequency convertor is more and more general.In this technical scheme, electrical network high pressure (6kV or 10kV) advances the power frequency phase shifting transformer that high voltage converter is gone into end, many windings low pressure of phase shifting transformer (about line voltage 690V) output, connect the input of series connection power cell, three-phase alternating current is handled through rectification, filtering, the inverter circuit of power cell, be together in series, the three-phase high-voltage that constitutes symmetry exchanges, and connects alternating current machine then again.Compare three level high-voltage transducer, the mutual electrical isolation of all power cells and suspend with the earth in the scheme by the unified control of the governor circuit of isolating through optical fiber, therefore can realize various ideal control algorithms, reaches perfect control effect.
Suspend owing to the mutual electrical isolation of power cell and with the earth, externally has only three-phase alternating current input and two-phase inversion output, an and control information transmission between the system master, the powerup issue of the weak control circuit of therefore necessary solution inside, unit and the drive circuit of device for power switching also promptly must the independent accessory power supply of design.The preferred version of accessory power supply is to adopt present widely used high frequency switch power.
Because the input voltage grade height of power cell uses high frequency switch power, must solve the startup problem of accessory power supply.At present in low voltage DC/DC field, extensively adopt resistance starting circuit shown in Figure 1 or constant-current source start-up circuit shown in Figure 2, but all there is following shortcoming in these two kinds of start-up circuits: the power consumption after starting current and the operate as normal is difficult to take into account, increase starting current and help circuit start, but the power consumption of operate as normal post consumption on resistance or constant-current source will be difficult to bear, reduce circuit power consumption and then must reduce starting current, be unfavorable for circuit start.For the Switching Power Supply of high pressure input, this problem is reflected more clearly.As adopt low voltage DC/DC converter, under onesize starting current situation, according to P=U
2/ R (resistance starting) or P=UI (constant-current source startup), the loss of start-up circuit will be geometric progression (resistance starting) or linear (constant-current source startup) increases, and side circuit all can not put up with.
Summary of the invention
In view of above-mentioned, the utility model will provide the auxiliary power start that a kind of circuit loss is little, starting current is big circuit.
For reaching this purpose, the utility model by the following technical solutions:
A kind of high voltage transducer power unit auxiliary power start circuit, it comprises:
One charge storage circuit is used to store the electric charge of sending here through the high pressure input circuit;
One pulse width modulation controlled chip accumulation power supply is used to the pulse width modulation controlled chip that starting current is provided;
One charge transfer circuit is used for electric charge is transferred to pulse width modulation controlled chip accumulation power supply, and its input connects the output of described charge storage circuit, and its output connects pulse width modulation controlled chip accumulation power supply;
One output voltage decision circuitry is used to control the keying of charge transfer circuit, and its output connects the control end of described charge transfer circuit.
In specific embodiments of the present utility model:
Described charge storage circuit is made of the charging resistor and first energy storage capacitor in series;
Described charge transfer circuit is made of controllable silicon, current-limiting resistance, first voltage-stabiliser tube, the positive terminal of described silicon controlled anode and described first storage capacitor joins, one end of negative electrode and described current-limiting resistance joins, and the negative electrode of described first voltage-stabiliser tube, anode join with described silicon controlled anode, the control utmost point respectively;
Described pulse width modulation controlled chip accumulation power supply is made of second storage capacitor, and the positive terminal of second storage capacitor and the other end of described current-limiting resistance join;
Described output voltage decision circuitry is made of second voltage-stabiliser tube, first and second transistors, described first and second transistor series, the anode of described second voltage-stabiliser tube connects the base stage of the first transistor, and the emitter-base bandgap grading of described transistor seconds, the collection utmost point join with described silicon controlled anode, negative electrode respectively.
Before the power initiation, the high voltage direct current input is charged to first storage capacitor by big resistance charging resistor, rise to the threshold voltage of first voltage stabilizing didoe when this capacitance voltage after, controllable silicon is opened, high voltage direct current is to control circuit for pulse-width modulation and the power supply of second storage capacitor, after voltage on second storage capacitor arrives the starting resistor of pulse width modulating chip, the modulating pulse of pulse width modulating chip output pulse width, the high pressure input is the high frequency conversion that core constitutes via pulse width modulating chip, cause auxiliary winding to obtain low pressure output and charge to second storage capacitor, after the voltage of this electric capacity rises to threshold voltage by second voltage stabilizing didoe, first and second transistor turns, because the saturation voltage drop of transistor seconds is much smaller than the silicon controlled conduction voltage drop, so controllable silicon ends.Circuit just enters normal operating conditions, import to the pulse width modulating chip feeder ear by transistor seconds from high pressure input anode fully through the electric current that charging resistor flows out, and the stored charge process of first storage capacitor is carried out no longer owing to the conducting of transistor seconds.
After the high pressure input outage, after auxiliary winding output voltage drops to the threshold voltage of less than second voltage stabilizing didoe, first and second transistors end, and the high voltage direct current input continues to charge to first storage capacitor by big resistance charging resistor, to realize restarting smoothly of accessory power supply.
The utlity model has following obvious advantage:
1. circuit loss is according to P=U
2/ R can significantly reduce by designing big resistance charging resistor;
2. starting current provides pulse current by the electric charge that is stored on the big capacity storage capacitor, and size is restricted hardly;
3. circuit is simple, realizes that cost is low easily.
Description of drawings
Be described further below in conjunction with accompanying drawing.
Fig. 1 is the resistance-type start-up circuit;
Fig. 2 is the constant-current source type start-up circuit;
Fig. 3 is a circuit block diagram of the present utility model;
Fig. 4 is a circuit diagram of the present utility model.
Embodiment
The utility model has solved the startup problem of this type of high voltage source cleverly by the charge storage carry circuit of a similar cistern.
The formation block diagram of start-up circuit is seen Fig. 3, it comprises charge storage circuit 1, charge transfer circuit 2, PWM (pulse-width modulation) control chip accumulation power supply 3, output voltage decision circuitry 4 four parts, high pressure input 5, auxiliary winding output 7 power supplys as start-up circuit, pwm chip 6 is as the load of start-up circuit.
In the exemplary circuit of Fig. 4:
Big resistance charging resistor R1, big capacity first storage capacitor C1 series connection constitute charge storage circuit;
Constitute charge transfer circuit by diode D1, controllable silicon Q1, the first voltage-stabiliser tube W1, current-limiting resistance R2, the positive terminal of the anode of controllable silicon Q1 and the first storage capacitor C1 joins, the end of negative electrode and current-limiting resistance R2 joins, and the negative electrode of the first voltage-stabiliser tube W1, anode join with the anode of controllable silicon Q1, the control utmost point respectively;
The pwm chip accumulation power supply is made of the second storage capacitor C2, and the other end of the positive terminal of C2 and current-limiting resistance R2 joins;
The output voltage decision circuitry is made of the second voltage-stabiliser tube W2, the first transistor Q3, transistor seconds Q2, resistance R 3-R5, Q3 and Q2 series connection, and the anode of W2 connects the base stage of Q3, and the emitter-base bandgap grading of Q2, the collection utmost point join with anode, the negative electrode of controllable silicon Q1 respectively;
R1 connects high pressure input anode, and D2 connects the output of the auxiliary winding of converter, the power end of the anodal termination pwm chip 6 of the second storage capacitor C2.
The course of work of following this circuit of surface analysis:
Before the power initiation, the high voltage direct current input is by the big resistance resistance R 1 of one group of series connection, to the large bulk capacitance C1 charging of serving as cistern, after the voltage of capacitor C 1 rises to the threshold voltage of voltage stabilizing didoe W1 voltage stabilizing value decision, just open the controllable silicon Q1 that serves as valve, to pwm control circuit and storage capacitor C2 power supply, R2 plays current-limiting resistance, to reduce the impact of pulse current to Q1, after voltage on the C2 arrives the starting resistor of PWM chip, the latter exports the PWM modulating pulse, the high pressure input is the high frequency conversion that core constitutes via the PWM chip, cause auxiliary winding to obtain low pressure output and charge to C2 by D2, after the voltage of C2 rises to threshold voltage by the decision of voltage stabilizing didoe W2 voltage stabilizing value, NPN triode Q3 conducting, and then the complete conducting of PNP triode Q2, enter saturatedly, because the saturation voltage drop of PNP triode is much smaller than the conduction voltage drop of controllable silicon Q1, controllable silicon Q1 forward current is because of ending less than keeping electric current.Circuit enters normal operating conditions at this moment, import to PWM chip power supply end by PNP triode Q2 from high pressure input anode fully through the electric current that big resistance resistance R 1 flows out, and the stored charge process of large bulk capacitance C1 is carried out no longer owing to the conducting of Q2.
After the high pressure input outage, when auxiliary winding output voltage be voltage on the C2 drop to be not enough to support the threshold voltage of voltage stabilizing didoe W2 conducting after, Q3 ends, and then Q2 ends, the high voltage direct current input continues to charge to large bulk capacitance C1 by big resistance resistance, the C1 stored charge is so that realize restarting smoothly of accessory power supply.
Can see the start-up circuit that adopts this patent design by above analysis, for the DC converter of high pressure input, have following obvious advantage:
1. circuit loss is according to P=U
2/ R can significantly reduce by designing big resistance charging resistor;
2. starting current provides pulse current by the electric charge that is stored on the large bulk capacitance, and size is restricted hardly;
3. circuit is simple, realizes that cost is low easily.
Above embodiment only for explanation circuit structure of the present utility model, does not limit protection range of the present utility model.To any equivalents that above embodiment did, all should be in protection range of the present utility model.
Claims (2)
1. high voltage transducer power unit auxiliary power start circuit is characterized in that it comprises:
One charge storage circuit is used to store the electric charge of sending here through the high pressure input circuit;
One pulse width modulation controlled chip accumulation power supply is used to the pulse width modulation controlled chip that starting current is provided;
One charge transfer circuit is used for electric charge is transferred to pulse width modulation controlled chip accumulation power supply, and its input connects the output of described charge storage circuit, and its output connects pulse width modulation controlled chip accumulation power supply;
One output voltage decision circuitry is used to control the keying of charge transfer circuit, and its output connects the control end of described charge transfer circuit.
2. high voltage transducer power unit auxiliary power start circuit as claimed in claim 1 is characterized in that:
Described charge storage circuit is made of the charging resistor and first energy storage capacitor in series;
Described charge transfer circuit is made of controllable silicon, current-limiting resistance, first voltage-stabiliser tube, the positive terminal of described silicon controlled anode and described first storage capacitor joins, one end of negative electrode and described current-limiting resistance joins, and the negative electrode of described first voltage-stabiliser tube, anode join with described silicon controlled anode, the control utmost point respectively;
Described pulse width modulation controlled chip accumulation power supply is made of second storage capacitor, and the positive terminal of second storage capacitor and the other end of described current-limiting resistance join;
Described output voltage decision circuitry is made of second voltage-stabiliser tube, first and second transistors, described first and second transistor series, the anode of described second voltage-stabiliser tube connects the base stage of the first transistor, and the emitter-base bandgap grading of described transistor seconds, the collection utmost point join with described silicon controlled anode, negative electrode respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620001981 CN2884686Y (en) | 2006-01-27 | 2006-01-27 | Power cell auxiliary power source starting circuit of high voltage converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620001981 CN2884686Y (en) | 2006-01-27 | 2006-01-27 | Power cell auxiliary power source starting circuit of high voltage converter |
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| CN2884686Y true CN2884686Y (en) | 2007-03-28 |
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| CN 200620001981 Expired - Fee Related CN2884686Y (en) | 2006-01-27 | 2006-01-27 | Power cell auxiliary power source starting circuit of high voltage converter |
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| CN (1) | CN2884686Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185468A (en) * | 2011-04-27 | 2011-09-14 | 大连连顺电子有限公司 | Multiplexing circuit of high-voltage starting switch and SenseFET and switching power supply applying circuit |
| CN102761239A (en) * | 2012-07-31 | 2012-10-31 | 成都启臣微电子有限公司 | Constant current and voltage starting circuit of switch power supply controller |
| CN103199716A (en) * | 2012-01-06 | 2013-07-10 | 牛嶋昌和 | Auxiliary power source generating circuit |
| CN104368898A (en) * | 2014-10-29 | 2015-02-25 | 上海沪工焊接集团股份有限公司 | Power supply circuit of welding machine |
| CN104734554A (en) * | 2015-01-19 | 2015-06-24 | 张湘杰 | Power source supercharger and power supply device |
| CN104836419A (en) * | 2015-05-25 | 2015-08-12 | 无锡安邦电气有限公司 | Switching power supply driver chip supply circuit with undervoltage detection function |
| CN104852562A (en) * | 2015-05-04 | 2015-08-19 | 黔西南州首创电子科技有限公司 | Low-loss universal starting circuit of switching power chip |
| CN108512408A (en) * | 2018-03-13 | 2018-09-07 | 上海希形科技有限公司 | DC power supply micro-current start-up circuit |
| CN111277128A (en) * | 2018-12-05 | 2020-06-12 | 联合汽车电子有限公司 | Flyback converter starting circuit and starting method based on high-voltage input |
-
2006
- 2006-01-27 CN CN 200620001981 patent/CN2884686Y/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185468B (en) * | 2011-04-27 | 2013-05-01 | 大连连顺电子有限公司 | Multiplexing circuit of high-voltage starting switch and Sense FET and switching power supply applying circuit |
| CN102185468A (en) * | 2011-04-27 | 2011-09-14 | 大连连顺电子有限公司 | Multiplexing circuit of high-voltage starting switch and SenseFET and switching power supply applying circuit |
| CN103199716A (en) * | 2012-01-06 | 2013-07-10 | 牛嶋昌和 | Auxiliary power source generating circuit |
| CN102761239B (en) * | 2012-07-31 | 2015-04-22 | 成都启臣微电子有限公司 | Constant current and voltage starting circuit of switch power supply controller |
| CN102761239A (en) * | 2012-07-31 | 2012-10-31 | 成都启臣微电子有限公司 | Constant current and voltage starting circuit of switch power supply controller |
| CN104368898B (en) * | 2014-10-29 | 2016-03-30 | 上海沪工焊接集团股份有限公司 | Welding machine power supply circuits |
| CN104368898A (en) * | 2014-10-29 | 2015-02-25 | 上海沪工焊接集团股份有限公司 | Power supply circuit of welding machine |
| CN104734554A (en) * | 2015-01-19 | 2015-06-24 | 张湘杰 | Power source supercharger and power supply device |
| CN104852562A (en) * | 2015-05-04 | 2015-08-19 | 黔西南州首创电子科技有限公司 | Low-loss universal starting circuit of switching power chip |
| CN104836419A (en) * | 2015-05-25 | 2015-08-12 | 无锡安邦电气有限公司 | Switching power supply driver chip supply circuit with undervoltage detection function |
| CN104836419B (en) * | 2015-05-25 | 2017-05-31 | 无锡安邦电气有限公司 | Switching Power Supply driving chip power supply circuit with under-voltage detection function |
| CN108512408A (en) * | 2018-03-13 | 2018-09-07 | 上海希形科技有限公司 | DC power supply micro-current start-up circuit |
| CN111277128A (en) * | 2018-12-05 | 2020-06-12 | 联合汽车电子有限公司 | Flyback converter starting circuit and starting method based on high-voltage input |
| CN111277128B (en) * | 2018-12-05 | 2021-06-08 | 联合汽车电子有限公司 | Flyback converter starting circuit and starting method based on high-voltage input |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: TAIYUAN POLYTECHNIC TIANCHENG ELECTRONIC INFORMAT Free format text: FORMER OWNER: TIANCHENG TECH CO., LTD., TAIYUAN SCIENCES + ENGINEERING Effective date: 20081010 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081010 Address after: No. 2 South Asia street, Taiyuan hi tech Zone, Shanxi, China: 030024 Patentee after: Tiancheng Co.,Ltd.of Taiyuan University of Technology Address before: Floor 10-11, building 5, Hongfeng garden, Feng Feng South Road, Shanxi, Taiyuan Province, 030024 Patentee before: Tiancheng Science and Technology Co., Ltd., Taiyuan Science and Engineering Univ |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070328 |