CN102570832A - Trigger power supply capable of following temperature characteristic of thyristor - Google Patents
Trigger power supply capable of following temperature characteristic of thyristor Download PDFInfo
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- CN102570832A CN102570832A CN201210012786XA CN201210012786A CN102570832A CN 102570832 A CN102570832 A CN 102570832A CN 201210012786X A CN201210012786X A CN 201210012786XA CN 201210012786 A CN201210012786 A CN 201210012786A CN 102570832 A CN102570832 A CN 102570832A
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Abstract
The invention relates to a trigger power supply capable of following a temperature characteristic of a thyristor. The trigger power supply comprises a rectifying filter, a PWM (Pulse-Width Modulation) inverter, an output rectifying filter, an output voltage stabilizer, a temperature-change voltage sampler, a temperature-change resistance network and a feedback circuit. The trigger power supply is capable of automatically adjusting the size of a trigger current by following the temperature characteristic of the thyristor within a working temperature scope of the thyristor, so as to cause the trigger current to be close to an optimum value, so that the heat productivity of related elements at high temperature is reduced, the triggering reliability is ensured and the triggering power at high temperature is efficiently reduced.
Description
Technical field
The present invention relates to power supply, particularly thyristor triggers power supply, is mainly used in the triggering power supply of bidirectional thyristor, belongs to the electronic power supply technical field.
Background technology
At present; The circuits for triggering power supply of thyristor both domestic and external adopts the transformer isolation power supply plan mostly; To control isolated from power and convert the required voltage of circuits for triggering into through triggering supply transformer; Insert the circuits for triggering that are connected with major loop, form through links such as rectification, filtering, voltage stabilizings and trigger power supply.There is following shortcoming in this kind mode:
1) volume of transformer is big.Need enough energy to satisfy the strong requirement that triggers of thyristor owing to trigger power supply, transformer efficiency and volume are all bigger, have taken sizable installing space, and failure rate is high;
2) waste energy during high temperature and reliability low.Thyristor is typical semiconductor device; Temperature is very big to its properties influence; When the trigger current in the time of-40 ℃ is 25 ℃ 2 times; When being 85 ℃ 4 times in order in the operating temperature range of design, to make its reliable triggering, normally design the triggering power supply by maximum trigger current required in the operating temperature range.And, when thyristor is worked at wide loading range,, need to adopt direct current to trigger or the triggering of high-frequency impulse row in order to make thyristor output voltage waveforms when flowing through little electric current intact.Therefore, guaranteeing that it is too big that the trigger current when high temperature just seems, both wasted the energy under the situation that low temperature can reliably trigger, relevant components and parts heating has seriously influenced the reliability of components and parts when also making high temperature.
Summary of the invention
The objective of the invention is to propose a kind of deficiency that can overcome prior art; Can in the thyristor operating temperature range, follow the thyristor temperature characterisitic and adjust the power supply of trigger current size automatically; Make trigger current near optimum value; The caloric value of relevant components and parts in the time of both can reducing high temperature can guarantee reliable trigger again, effectively reduces the triggering power under the high temperature.
The present invention is achieved in that a kind of triggering power supply of following the thyristor temperature characterisitic, it is characterized in that comprising following hardware circuit:
Temperature time variant voltage sampling [6]: link to each other with feedback [7] with output rectifying and wave-filtering A [4];
Temperature power transformation resistance network [9]: link to each other with output rectifying and wave-filtering B [8];
Pulse width modulation inverter [3]: link to each other with feedback [7] with rectifying and wave-filtering [2], output rectifying and wave-filtering B [8], output rectifying and wave-filtering A [4];
Output voltage stabilizing [5]: link to each other with output rectifying and wave-filtering A [4].
Include temperature variant element in the temperature time variant voltage sampling [6].
Include temperature variant element in the temperature power transformation resistance network [9].
The present invention uses above-mentioned critical piece to constitute according to above-mentioned design.Its operation principle is: through the output voltage sampling of warm time variant voltage sampling to the pulse width modulation inverter of process rectifying and wave-filtering; Its value becomes with the voltage of temperature with the output rectifying and wave-filtering; Through feedback; The output voltage of pulse width modulation inverter is changed with variation of temperature within the specific limits, and output voltage was low when temperature was high, and output voltage was high when temperature was low; Automatically adjust the electric current that triggers power supply output through warm power transformation resistance network; Trigger current becomes with temperature, and the equivalent resistance of temperature Gao Shiwen power transformation resistance network becomes big, and the trigger current of output is little; The equivalent resistance of temperature power transformation resistance network diminished when temperature was low, and the trigger current of output is big.Dual cooperation through warm time variant voltage sample circuit temperature power transformation resistance network can make trigger current near optimum value.
Output rectifying and wave-filtering A [4] supplies power to external control circuit through after exporting voltage stabilizing [5].
Output rectifying and wave-filtering B [8] is the triggering power supply that produces through pulse width modulation inverter [3].Multichannel can be set as required trigger power supply, trigger between power supply on each road can carry out electrical isolation through a plurality of windings in the pulse width modulation inverter.
Input filtering [1] normally is provided with for Electro Magnetic Compatibility, can effectively reduce electromagnetic interference.
Advantage of the present invention and effect:
(1) can in the thyristor operating temperature range, follow the size that the thyristor temperature characterisitic is adjusted trigger current automatically.
(2) can make the thyristor trigger current near optimum value.
(3) caloric value of relevant components and parts can guarantee reliable trigger again in the time of both can having reduced high temperature, effectively reduced the triggering power under the high temperature.
(4) cost is low, volume is little, reliability is high.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 is a circuit block diagram of the present invention.
Fig. 2 is the circuit theory diagrams of embodiment.
Embodiment
Referring to Fig. 1, AC power gets into pulse width modulation inverter [3] through input filtering [1], rectifying and wave-filtering [2], and inversion output is pressed and supplied outside control circuit to use through output rectifying and wave-filtering A [4], output voltage stabilizing [5] output galvanic current; Inversion output becomes the triggering power supply through output rectifying and wave-filtering B [8], for outside thyristor trigger current is provided through warm power transformation resistance network [9] again; Temperature time variant voltage sampling [6] is carried out voltage sampling to output rectifying and wave-filtering A [4], to pulse width modulation inverter [3] feedback signal is provided through feedback [7], makes the output voltage of inverter under stable temperature, keep stable.
Referring to Fig. 2, be that CZ1 is AC in connector through the single-end flyback switching power supply after improving, F1, F2 are cartridge fuses, R1 is a NTC resistance, limit inrush currents.Input filtering [1] is made up of capacitor C 1, C2, C3 and common mode filtering inductance L 1, is provided with for improving Electro Magnetic Compatibility.Rectifying and wave-filtering [2] is made up of rectifier bridge BR1 and capacitor C 4; Pulse width modulation inverter [3] is made up of single-chip switching pressurizer U1 (model is TOP224) and transformer T1, diode D1, D2, D5, resistance R 2, capacitor C 5, C11; Direct current is become alternating current, isolate output through the different windings of transformer T1.Output rectifying and wave-filtering A [4] is made up of diode D4, inductance L 3 and capacitor C 8, C9.Output voltage stabilizing [5] is made up of integrated regulator U4 (model is LM7805), capacitor C 10, exports stable 5V voltage, supplies outside control circuit to use, and light-emitting diode D6 is a power supply indicator, and R6 is a current-limiting resistance.
Temperature time variant voltage sampling [6] is made up of voltage stabilizing didoe D7, resistance R 10～R13, and wherein R10 is the NTC thermistor, and resistance value diminished when temperature raise.
Feedback [7] is made up of photoelectrical coupler U2 (model is PC817A), adjustable voltage benchmark U3 (model is TL431), capacitor C 13, resistance R 7～R9.
Output rectifying and wave-filtering B [8] is made up of diode D3, inductance L 2, capacitor C 6, C7, for the thyristor of outside provides the triggering power supply.
Temperature power transformation resistance network [9] is made up of resistance R 3～R5, R wherein, and the 3rd, the PTC thermistor, resistance value became greatly when temperature raise.
Claims (3)
1. triggering power supply of following the thyristor temperature characterisitic is characterized in that comprising following hardware circuit:
Temperature time variant voltage sampling [6]: link to each other with feedback [7] with output rectifying and wave-filtering A [4];
Temperature power transformation resistance network [9]: link to each other with output rectifying and wave-filtering B [8];
Pulse width modulation inverter [3]: link to each other with feedback [7] with rectifying and wave-filtering [2], output rectifying and wave-filtering B [8], output rectifying and wave-filtering A [4].
2. a kind of triggering power supply of following the thyristor temperature characterisitic according to claim 1 is characterized in that including temperature variant element in the warm time variant voltage sampling [6].
3. a kind of triggering power supply of following the thyristor temperature characterisitic according to claim 1 is characterized in that including temperature variant element in the warm power transformation resistance network [9].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210012786XA CN102570832A (en) | 2012-01-16 | 2012-01-16 | Trigger power supply capable of following temperature characteristic of thyristor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210012786XA CN102570832A (en) | 2012-01-16 | 2012-01-16 | Trigger power supply capable of following temperature characteristic of thyristor |
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| CN102570832A true CN102570832A (en) | 2012-07-11 |
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| CN201210012786XA Pending CN102570832A (en) | 2012-01-16 | 2012-01-16 | Trigger power supply capable of following temperature characteristic of thyristor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132473A (en) * | 2017-05-17 | 2017-09-05 | 肇庆三向教学仪器制造有限公司 | A kind of low-voltage intelligent monitoring terminal |
| CN112783254A (en) * | 2020-12-23 | 2021-05-11 | 南京交通职业技术学院 | Auxiliary voltage source capable of automatically adjusting output and suitable for building safety |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01190259A (en) * | 1988-01-25 | 1989-07-31 | Fuji Electric Co Ltd | Gate drive circuit for gate-turnoff thyristor |
| JP2009219221A (en) * | 2008-03-10 | 2009-09-24 | Panasonic Corp | Charging equipment |
| CN201481994U (en) * | 2009-08-06 | 2010-05-26 | 戴维逊磁疗技术（厦门）有限公司 | Intelligent control device of thyristor |
| CN202406028U (en) * | 2012-01-16 | 2012-08-29 | 翁玉琴 | Trigger power source according with temperature characteristics of thyristor |
-
2012
- 2012-01-16 CN CN201210012786XA patent/CN102570832A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01190259A (en) * | 1988-01-25 | 1989-07-31 | Fuji Electric Co Ltd | Gate drive circuit for gate-turnoff thyristor |
| JP2009219221A (en) * | 2008-03-10 | 2009-09-24 | Panasonic Corp | Charging equipment |
| CN201481994U (en) * | 2009-08-06 | 2010-05-26 | 戴维逊磁疗技术（厦门）有限公司 | Intelligent control device of thyristor |
| CN202406028U (en) * | 2012-01-16 | 2012-08-29 | 翁玉琴 | Trigger power source according with temperature characteristics of thyristor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132473A (en) * | 2017-05-17 | 2017-09-05 | 肇庆三向教学仪器制造有限公司 | A kind of low-voltage intelligent monitoring terminal |
| CN112783254A (en) * | 2020-12-23 | 2021-05-11 | 南京交通职业技术学院 | Auxiliary voltage source capable of automatically adjusting output and suitable for building safety |
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Application publication date: 20120711 |