CN101227139A - Apparatus and method for controlling bidirectional thyristor - Google Patents
Apparatus and method for controlling bidirectional thyristor Download PDFInfo
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- CN101227139A CN101227139A CNA2007100728540A CN200710072854A CN101227139A CN 101227139 A CN101227139 A CN 101227139A CN A2007100728540 A CNA2007100728540 A CN A2007100728540A CN 200710072854 A CN200710072854 A CN 200710072854A CN 101227139 A CN101227139 A CN 101227139A
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Abstract
The invention relates to a two-way thyratron transistor controlling method and a device, wherein zero-cross notifying signals are provided by a zero-cross detecting circuit in the set time range before alternating current actually crosses zero, a first driving pulse is provided to a gate of the two-way thyratron transistor after a microprocessor receives the zero-cross notifying signals, a timer is started to set time for the width of the first driving pulse, and a state mark is set as a first state, the microprocessor is used to judge the state mark when the set time of the timer is achieved, if the state mark is the first state, the first driving pulse is finished to provide, and the timer is started to set time for starting time of a second driving pulse, a state mark is set as a second state, if the state mark is the second state, the second driving pulse is provided, the timer is started to set time for the width of the second driving pulse, a state mark is set as a third state, if the state mark is the third driving state, the second driving pulse is finished to provide, and the state mark is cleaned. The two-way thyratron transistor controlling device has low cost and low electromagnetic interference.
Description
Technical field
The present invention relates to the control of bidirectional thyristor, relate in particular to and use the drive controlling of bidirectional thyristor when large power, electrically is resistive.
Background technology
There is a lot of employing small-signals to control and adopts the bidirectional thyristor of the powerful device of electric main power supply to use, regulate electric fan and coffee machine etc. as light.To control the bidirectional thyristor of three ends effectively, need on its gate electrode, provide trigger impulse, with the maintenance conducting when the civil power zero passage of the two ends that guarantee to link to each other with load.Realize the conducting that continues, when electric current is to zero, the trigger impulse that continues need be provided and be maintained to the arrival of next ac cycle.To the detection of electric current, be also referred to as zero passage detection near zero opportunity.
Under the situation of control powerful device, as electric heater, the triggering of accurately controlling bidirectional thyristor near zero-crossing point is very important for the distortion and the electromagnetic interference that reduce civil power.In order to satisfy the requirement of this respect, such as European standard, existing zero passage detection mostly adopts the special electronic device, as: light lotus root bidirectional thyristor driver, operational amplifier or comparator and so on cooperate with microprocessor, these implementations, and cost is higher relatively.
Summary of the invention
The objective of the invention is to, adopt the circuit that is made of common components and parts and microprocessor, the bidirectional thyristor of realizing in conjunction with novel driven algorithm with low cost, the resistive equipment of large power, electrically that electromagnetic interference is low, such as electric heater drives.
The technical scheme that the present invention is adopted for achieving the above object comprises, a kind of method for controlling bidirectional thyristor is provided, comprise that by structure a zero cross detection circuit and a microprocessor circuit realize the bidirectional thyristor gate pole control to charged resistive load, this microprocessor comprises a timer, the step that comprises:
A. make described zero cross detection circuit, the alternating current on bidirectional thyristor and two ends that load links to each other by positive half wave in negative half-wave conversion process, before the actual zero passage, in a time range of setting, provide the zero passage notification signal to described microprocessor;
B. make described microprocessor after receiving the zero passage notification signal, gate pole to bidirectional thyristor provides first trigger impulse, corresponding alternating current by positive half wave to negative half-wave or by the negative zero passage of half-wave in the positive half wave conversion process, the startup timer carries out timing to the width of this first trigger impulse, and configuration state is masked as first state;
C. make described microprocessor when the timing of timer arrives, judge Status Flag:
If first state then is provided by providing of first trigger impulse, and starts timer opportunity is carried out timing in the startup of second trigger impulse, configuration state is masked as second state;
If second state, then make described microprocessor provide second trigger impulse to the gate pole of bidirectional thyristor, corresponding alternating current is by the negative zero passage of half-wave in the positive half wave conversion process, and the startup timer carries out timing to the width of this second trigger impulse, and configuration state is masked as the third state;
If the third state then is provided by providing of second trigger impulse, and clear Status Flag, step b returned.
As seen, zero cross detection circuit reality only detects zero passage one time in a complete cycle of alternating current, and another time zero passage is inferred by timer internal by microprocessor.Like this, can simplify the complexity of zero passage detection greatly, reduce and realize cost.
The width of first pulse and second pulse depends on the electrical characteristic of bidirectional thyristor.During for resistive load, pulse duration generally can be as short as 400 microseconds.Short pulse can reduce overall current demand and not influence performance, can also use cheaper components and parts, further reduces the cost.
Make described zero cross detection circuit comprise a rectifier diode, one first resistance, one voltage stabilizing didoe, one electric capacity and one second resistance, the positive pole of described rectifier diode links to each other with an end of detected alternating current, the negative pole of this rectifier diode links to each other with an end of first resistance, the other end of this first resistance links to each other with an end of the negative pole of described voltage stabilizing didoe, electric capacity and an end of second resistance, and the other end of the positive pole of this voltage stabilizing didoe, the other end of electric capacity and second resistance links to each other with the other end of detected alternating current;
Described first resistance is linked to each other with the input pin of described microprocessor with the negative pole of described voltage stabilizing didoe, an end of electric capacity and the end that second resistance links to each other.
Described microprocessor comprises an external interrupt treatment circuit, makes the input pin of the input pin that links to each other with described zero cross detection circuit of this microprocessor for this external interrupt treatment circuit.
The time range of described setting is determined by the described electric capacity and second resistance, and described electric capacity is coincide in the actual zero passage of alternating current in the input triggering level of described microprocessor by second conductive discharge.
Further, the technical scheme that the present invention is adopted for achieving the above object also comprises, manufactures a kind of bidirectional thyristor control device of realizing said method.
Compared with prior art, method for controlling bidirectional thyristor of the present invention and device, with low cost, electromagnetic interference is low.
Description of drawings
Fig. 1 is the schematic diagram of method for controlling bidirectional thyristor of the present invention and device embodiment;
Fig. 2 is zero cross detection circuit figure in the embodiment of the invention;
Fig. 3 is a microprocessor external interrupt process chart in the embodiment of the invention;
Fig. 4 is a timing microprocessor device Interrupt Process flow chart in the embodiment of the invention;
Fig. 5 is method for controlling bidirectional thyristor of the present invention and device embodiment sequential chart.
Embodiment
Optimum embodiment below in conjunction with shown in the accompanying drawing further elaborates the present invention.
Method for controlling bidirectional thyristor of the present invention and device embodiment as shown in Figures 1 to 4, comprise DC power supply 1, zero cross detection circuit 2, microprocessor 3, control in order to the gate pole to the bidirectional thyristor T of charged resistive load 4.
Zero cross detection circuit 2 is by rectifier diode D1, resistance R 1 and R2, voltage stabilizing didoe Z1 and capacitor C 1 are formed, wherein, D1 converts interchange to direct current by the blocking-up reverse current, during the forward conduction of D1, Z1 is in order to the incoming level level of the pin that output voltage is limited in microprocessor, and R1 is in order to current limliting.When the magnitude of voltage of outside civil power drops to the puncture voltage of Z1 pipe when following, output voltage begins to descend, at this moment, more approaching with the zero crossing actual specific of alternating current, C1 begins to discharge by resistance R 2, and the speed of discharge is directly proportional with the product value of C1 and R2, and the triggering threshold of general incoming level of considering microprocessor is mostly about 0.7V, discharge time, combination was adjusted according to different C1 and R2, made time that voltage drops to 0.7V and actual zero-crossing timing match.Like this, microprocessor can in time carry out the trigger impulse of bidirectional thyristor to be handled, such as: in actual zero passage.
As shown in Figure 3 and Figure 4, the program of microprocessor operation will respond interruption, sequential then as shown in Figure 5, owing to second trigger impulse is to calculate according to internal time, shift to an earlier date its start-up time wittingly.Because first trigger impulse makes bidirectional thyristor T be in conducting state, thereby second trigger impulse that shifts to an earlier date can not have influence on the operation of bidirectional thyristor T, and when the upper half that can guarantee bidirectional thyristor is triggered, can not cause distortion, thereby reduce electromagnetic interference.
Method for controlling bidirectional thyristor of the present invention and device, used components and parts are general or cheap.For example, can under the situation of very low electromagnetic interference, provide bidirectional thyristor to trigger with next group parameter:
R1 is 100k Ω, and R2 is 3.9k Ω, carbon film, and precision is 5%, power is 1/4W;
C1 is 100nF, pottery, and precision is 20%, withstand voltage is 50V;
D1 is 1N4004, electric current 1A, power 3W;
Z1 is 1N4733, voltage stabilizing value 5.1V, precision 5%, power 1W;
As long as microprocessor triggers and a timer internal for having an external interrupt.
In order to allow component parameter in a big way, normally, chance can be according to the worst case of parameter and shifted to an earlier date wittingly during the triggering of first pulse.Yet this can causing in advance in the initial period of bidirectional thyristor conducting, electric main has a little but distortion in allowed band to produce.And after cycle because the bidirectional thyristor conducting has been in conducting state, just do not have extra influence and distortion and occur.
The width of first pulse and second pulse depends on the electrical characteristic of bidirectional thyristor.During for resistive load, pulse duration generally can be as short as 400 microseconds.Short pulse can reduce overall current demand and not influence performance, can also use cheaper components and parts, further reduces the cost.
Method for controlling bidirectional thyristor of the present invention and device, for originally having comprised that an application that is used for the simple microprocessor of man-machine interface is particularly useful in the equipment, several components and parts that only need increase simple, minority just can low distortion ground, increase the additional function of the resistive load of driving large power, electrically effectively.
The most preferred embodiment of the above is intended to specify thinking of the present invention.The present invention's enforcement is not limited to the disclosed mode of above most preferred embodiment, and is all based on above-mentioned mentality of designing, simply deduces and replace, and the concrete beverage machine that obtains all belongs to enforcement of the present invention.
Claims (10)
1. a method for controlling bidirectional thyristor comprises that by structure a zero cross detection circuit and a microprocessor circuit realize the bidirectional thyristor gate pole control to charged resistive load, and this microprocessor comprises a timer, it is characterized in that, the step that comprises:
A. make described zero cross detection circuit, alternating current on bidirectional thyristor and two ends that load links to each other by positive half wave to negative half-wave transform or by negative half-wave in the positive half wave conversion process, before the actual zero passage, in a time range of setting, provide the zero passage notification signal to described microprocessor;
B. make described microprocessor after receiving the zero passage notification signal, gate pole to bidirectional thyristor provides first trigger impulse, corresponding alternating current is by the zero passage of positive half wave in negative half-wave conversion process, the startup timer carries out timing to the width of this first trigger impulse, and configuration state is masked as first state;
C. make described microprocessor when the timing of timer arrives, judge Status Flag:
If first state then is provided by providing of first trigger impulse, and starts timer opportunity is carried out timing in the startup of second trigger impulse, configuration state is masked as second state;
If second state, then make described microprocessor provide second trigger impulse to the gate pole of bidirectional thyristor, corresponding alternating current is by the negative zero passage of half-wave in the positive half wave conversion process, and the startup timer carries out timing to the width of this second trigger impulse, and configuration state is masked as the third state;
If the third state then is provided by providing of second trigger impulse, and clear Status Flag, step b returned.
2. method for controlling bidirectional thyristor as claimed in claim 1 is characterized in that:
Make described zero cross detection circuit comprise a rectifier diode, one first resistance, one voltage stabilizing didoe, one electric capacity and one second resistance, the positive pole of described rectifier diode links to each other with an end of detected alternating current, the negative pole of this rectifier diode links to each other with an end of first resistance, the other end of this first resistance links to each other with an end of the negative pole of described voltage stabilizing didoe, electric capacity and an end of second resistance, and the other end of the positive pole of this voltage stabilizing didoe, the other end of electric capacity and second resistance links to each other with the other end of detected alternating current;
Described first resistance is linked to each other with the input pin of described microprocessor with the negative pole of described voltage stabilizing didoe, an end of electric capacity and the end that second resistance links to each other.
3. method for controlling bidirectional thyristor as claimed in claim 2 is characterized in that:
Described microprocessor comprises an external interrupt treatment circuit, makes the input pin of the input pin that links to each other with described zero cross detection circuit of this microprocessor for this external interrupt treatment circuit.
4. method for controlling bidirectional thyristor as claimed in claim 2 is characterized in that:
The time range of described setting is determined by the described electric capacity and second resistance.
5. method for controlling bidirectional thyristor as claimed in claim 4 is characterized in that:
Described electric capacity is coincide in the actual zero passage of alternating current in the input triggering level of described microprocessor by second conductive discharge.
6. bidirectional thyristor control device is used for realizing that the bidirectional thyristor gate pole to charged resistive load controls, and comprises a zero cross detection circuit and a microprocessor circuit, and this microprocessor comprises a timer, it is characterized in that:
Described zero cross detection circuit, the alternating current on bidirectional thyristor and two ends that load links to each other by positive half wave in negative half-wave conversion process, before the actual zero passage, in a time range of setting, provide the zero passage notification signal to described microprocessor;
The program of moving in the described microprocessor comprises step:
I. after receiving the zero passage notification signal, gate pole to bidirectional thyristor provides first trigger impulse, corresponding alternating current is by the zero passage of positive half wave in negative half-wave conversion process, and the startup timer carries out timing to the width of this first trigger impulse, and configuration state is masked as first state;
Ii. when the timing of timer arrives, judge Status Flag:
If first state then is provided by providing of first trigger impulse, and starts timer opportunity is carried out timing in the startup of second trigger impulse, configuration state is masked as second state;
If second state, then described microprocessor provides second trigger impulse to the gate pole of bidirectional thyristor, corresponding alternating current is by the negative zero passage of half-wave in the positive half wave conversion process, and the startup timer carries out timing to the width of this second trigger impulse, and configuration state is masked as the third state;
If Status Flag is the third state, providing of second trigger impulse then is provided, and clear Status Flag, return step I.
7. bidirectional thyristor control device as claimed in claim 6 is characterized in that:
Described zero cross detection circuit comprises a rectifier diode, one first resistance, one voltage stabilizing didoe, one electric capacity and one second resistance, the positive pole of described rectifier diode links to each other with an end of detected alternating current, the negative pole of this rectifier diode links to each other with an end of first resistance, the other end of this first resistance links to each other with an end of the negative pole of described voltage stabilizing didoe, electric capacity and an end of second resistance, and the other end of the positive pole of this voltage stabilizing didoe, the other end of electric capacity and second resistance links to each other with the other end of detected alternating current;
Described first resistance links to each other with the input pin of described microprocessor with the negative pole of described voltage stabilizing didoe, an end of electric capacity and the end that second resistance links to each other.
8. bidirectional thyristor control device as claimed in claim 7 is characterized in that:
Described microprocessor comprises an external interrupt treatment circuit, and the input pin that links to each other with described zero cross detection circuit of this microprocessor is the input pin of this external interrupt treatment circuit.
9. bidirectional thyristor control device as claimed in claim 7 is characterized in that:
The time range of described setting is determined by the described electric capacity and second resistance.
10. method for controlling bidirectional thyristor as claimed in claim 9 is characterized in that:
Described electric capacity coincide in the actual zero passage of alternating current in the input triggering level of described microprocessor by second conductive discharge.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007100728540A CN101227139A (en) | 2007-01-15 | 2007-01-15 | Apparatus and method for controlling bidirectional thyristor |
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| CNA2007100728540A CN101227139A (en) | 2007-01-15 | 2007-01-15 | Apparatus and method for controlling bidirectional thyristor |
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| CN106950418A (en) * | 2017-03-21 | 2017-07-14 | 深圳市复兴伟业技术有限公司 | The determination methods of bidirectional triode thyristor alternating current break-make |
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| CN111884488A (en) * | 2020-08-06 | 2020-11-03 | 宜宾职业技术学院 | Driving method for bidirectional thyristor self-adaptive phase-shifting energy conservation |
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- 2007-01-15 CN CNA2007100728540A patent/CN101227139A/en active Pending
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| CN107295730A (en) * | 2015-05-08 | 2017-10-24 | 湖南工业大学 | A kind of method that single live wire sends the brightness control signal of the multiple LEDs of control |
| CN107343348A (en) * | 2015-05-08 | 2017-11-10 | 湖南工业大学 | A kind of method that single live wire sends Lamp with ceiling fan control signal |
| CN108990201A (en) * | 2015-05-08 | 2018-12-11 | 湖南工业大学 | A kind of wall controlled LED lamp low harmony wave light-dimming method |
| CN109152179A (en) * | 2015-05-08 | 2019-01-04 | 湖南工业大学 | A kind of circuit of single fire line control Lamp with ceiling fan |
| CN104837258A (en) * | 2015-05-08 | 2015-08-12 | 湖南工业大学 | Circuit for controlling ceiling fan and lamp through single live wire |
| CN109348569A (en) * | 2015-05-08 | 2019-02-15 | 湖南工业大学 | It is a kind of list firewire on zero cross signal production method |
| CN109152145B (en) * | 2015-05-08 | 2020-09-29 | 湖南工业大学 | Single-live-wire low-harmonic adjustment method for controlling brightness of LED lamp |
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| CN106950418A (en) * | 2017-03-21 | 2017-07-14 | 深圳市复兴伟业技术有限公司 | The determination methods of bidirectional triode thyristor alternating current break-make |
| CN106950418B (en) * | 2017-03-21 | 2019-05-17 | 深圳市复兴伟业技术有限公司 | The judgment method of bidirectional triode thyristor alternating current on-off |
| CN109709587A (en) * | 2018-12-27 | 2019-05-03 | 上海司南卫星导航技术股份有限公司 | Multiple affair processing method and its circuit |
| CN111884488A (en) * | 2020-08-06 | 2020-11-03 | 宜宾职业技术学院 | Driving method for bidirectional thyristor self-adaptive phase-shifting energy conservation |
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Open date: 20080723 |