CN102323472A - Voltage zero crossing detection device and zero crossing fling-cut switch - Google Patents
Voltage zero crossing detection device and zero crossing fling-cut switch Download PDFInfo
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- CN102323472A CN102323472A CN201110279188A CN201110279188A CN102323472A CN 102323472 A CN102323472 A CN 102323472A CN 201110279188 A CN201110279188 A CN 201110279188A CN 201110279188 A CN201110279188 A CN 201110279188A CN 102323472 A CN102323472 A CN 102323472A
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Abstract
The invention discloses a voltage zero crossing detection device and a zero crossing fling-cut switch belonging to the field of electric products. The voltage zero crossing detection device stores energy for an energy storage capacitor in a non zero crossing period by using an input voltage, energy stored by the energy storage capacitor provides working energy to a photoelectric coupler, the voltage detection circuit controls the connection output of the photoelectric coupler in an input voltage zero crossing period and has the characteristics of accuracy voltage zero crossing detection and low energy consumption. By adopting the voltage zero crossing detection device disclosed by the invention as a zero crossing fling-cut switch of the zero crossing detection, the accuracy of the switching voltage zero crossing connection in a main loop is greatly improved, large current impaction of the moment of connecting a load to a main loop switch is reduced, so that the zero crossing fling-cut switch disclosed by the invention has the advantages of small connection inrush current, high reliability and long electric service life.
Description
Technical field
Voltage zero-cross pick-up unit of the present invention and operating passing zero switch belong to field of electronics; Particularly a kind ofly the various occasions that need voltage zero-cross to detect can be conveniently be applied in, and the operating passing zero switch that voltage zero-cross, energy consumption is low, photoelectricity is isolated voltage zero-cross pick-up unit and a kind of connection are shoved little, that reliability is high can be accurately detected.
Background technology
In electric system, the thyristor that is widely used, synchro switch, these several kinds of operating passing zero switches of combination switch carry out the voltage zero-cross input to the electric capacity even load at present, and are little in order to make electric capacity drop into dash current; Must guarantee that switch can accurately connect at voltage over zero, this voltage zero-cross pick-up unit that just requires to be connected with the major loop switch ends detects accurately, and commonly used is to be composed in series input circuit (seeing accompanying drawing 1) by photoelectrical coupler OPT1 input end and current-limiting resistance R1 at present; Output terminal output voltage zero passage detection voltage of signals zero crossing detection device by photoelectrical coupler OPT1; Photoelectrical coupler OPT1 output terminal ends when alternating voltage is low, and the output voltage zero cross signal receives the restriction of present semiconductor material and manufacturing process because of photoelectrical coupler; All to reach and drive reliably output of input current more than 1 milliampere; There is the big and big shortcoming of photoelectricity transmission efficient discreteness of drive current in photoelectrical coupler, as requires voltage zero-cross pick-up unit accuracy in detection to reach positive and negative 5V, and the resistance that then requires current-limiting resistance is=5000 ohm of 5 volts/0.001 peaces; Here the conduction voltage drop of photoelectrical coupler is ignored; When input voltage when exchanging 380V, the energy consumption of input circuit is (380 volts/5000 ohm) * 380 volts=28.88 watts, this just requires current-limiting resistance power to guarantee enough drive currents very greatly; For taking into account acceptable energy consumption; General current-limiting resistance power is controlled at about 5W, as presses 5W and calculate, and the resistance of current-limiting resistance is: 380 volts/(5 watts/380 volts)=28880 ohm; Voltage zero-cross pick-up unit accuracy in detection is: * 28880 ohm=28.88 volts of 0.001 peaces; The voltage zero-cross pick-up unit of most of this simple employing current-limiting resistance series connection photoelectrical couplers; Voltage zero-cross detects has positive and negative tens volts of deviations; Because it is accurately poor that voltage zero-cross detects, switch connection can produce bigger surge current, and the serviceable life and the reliability of load and switch itself are brought extremely adverse influence.
Summary of the invention
The objective of the invention is to avoid having the weak point of voltage zero-cross pick-up unit now and voltage zero-cross pick-up unit that a kind of voltage zero-cross detects accurately, energy consumption is low and the operating passing zero switch that a kind of voltage zero-cross input is accurate, reliability is high being provided.
Realization the objective of the invention is to reach through following technical scheme: a kind of voltage zero-cross pick-up unit; Current-limiting resistance is connected with rectification circuit; Said rectification circuit output loop connects storage capacitor; Voltage detecting circuit is connected in the input circuit; Said voltage detecting circuit output terminal is connected with said photoelectrical coupler, and said voltage detecting circuit is controlled said photoelectrical coupler output voltage zero cross signal when voltage zero-cross, and the work capacity of said photoelectrical coupler is provided by said storage capacitor.
A kind of voltage zero-cross pick-up unit; It is characterized in that said voltage detecting circuit input end is connected with said rectification circuit output end; Said voltage detecting circuit output terminal is connected with said photoelectrical coupler, and said rectification circuit output end is connected with said storage capacitor through diode.
A kind of voltage zero-cross pick-up unit is characterized in that said rectification circuit output loop is connected with amplitude limiter circuit.
A kind of voltage zero-cross pick-up unit is characterized in that said rectification circuit input circuit is connected with amplitude limiter circuit.
A kind of voltage zero-cross pick-up unit is characterized in that said voltage detecting circuit working power end is connected to said storage capacitor.
A kind of operating passing zero switch; It is characterized in that; Comprise the above voltage zero-cross pick-up unit, major loop switch, control circuit of item arbitrarily, said voltage zero-cross pick-up unit input end is connected with said major loop switch, and said voltage zero-cross pick-up unit output terminal is connected with said control circuit; Said control circuit is connected with said major loop switch control end, and said control circuit is connected with power supply;
A kind of operating passing zero switch is characterized in that said control circuit is connected with control port.
A kind of operating passing zero switch is characterized in that said major loop switch is a mechanical switch.
A kind of operating passing zero switch is characterized in that said major loop switch is a power semiconductor.
A kind of operating passing zero switch is characterized in that said major loop switch is composed in parallel by mechanical switch and power semiconductor.
Its principle of work: this voltage zero-cross pick-up unit passes through current-limiting resistance, rectification circuit to the storage capacitor energy storage during the non-zero passage of input voltage; Utilize the electric capacity energy stored that the photoelectrical coupler work capacity is provided, voltage detecting circuit is at input voltage zero passage drive photoelectrical coupler output voltage zero cross signal.
The present invention is reasonable in design; This voltage zero-cross pick-up unit utilizes input voltage during non-zero passage, to pass through current-limiting resistance, rectification circuit rectification to the storage capacitor energy storage, by the storage capacitor energy stored photoelectrical coupler work capacity is provided, and voltage detecting circuit is exported in the conducting of input voltage zero passage drive photoelectrical coupler; Because the time is long during the non-zero passage of alternating current; Storage capacitor can have time enough to carry out energy storage, and photoelectrical coupler drives compole short (several microseconds to tens of microseconds) when exporting zero cross signal, under the situation that the entire circuit consumed energy is very little like this; Enough drive currents that photoelectrical coupler also can obtain; Have the response speed that is exceedingly fast, can also can reach voltage zero-cross and detect purpose (can reach in a few volt scopes) accurately so that the voltage zero-cross pick-up unit is selected the current-limiting resistance that resistance is big, power is very little for use; This voltage zero-cross pick-up unit has voltage zero-cross and detects accurate, characteristic of low energy consumption, is suitable for using in the various occasions that need voltage zero-cross to detect.Adopt the operating passing zero switch of voltage zero-cross pick-up unit of the present invention as zero passage detection; Improved the accuracy that major loop switching voltage zero passage is connected greatly; Reduced and connected load moment heavy current impact, made operating passing zero switch of the present invention have and connect the advantage little, that reliability is high, electric life is long of shoving the major loop switch.
Description of drawings
Accompanying drawing 2 is one of voltage zero-cross pick-up unit embodiment of the present invention circuit diagrams.
Accompanying drawing 3 is two circuit diagrams of voltage zero-cross pick-up unit embodiment of the present invention.
Accompanying drawing 4 is three-circuit synoptic diagram of voltage zero-cross pick-up unit embodiment of the present invention.
Accompanying drawing 5 is one of operating passing zero switch embodiment of the present invention circuit diagrams.
Accompanying drawing 6 is two circuit diagrams of operating passing zero switch embodiment of the present invention.
Accompanying drawing 7 is three-circuit synoptic diagram of operating passing zero switch embodiment of the present invention.
Embodiment
Voltage zero-cross pick-up unit shown in accompanying drawing 2; J1, J2 are the input endpoint of voltage zero-cross pick-up unit input circuit; J3, J4 are this voltage zero-cross pick-up unit exit point; Input signal is through current-limiting resistance R1, rectification circuit D1 rectification (D1 is a diode in the accompanying drawing 2), storage capacitor C1 energy storage, and storage capacitor C1 connects amplitude limiter circuit Z1 (amplitude limiter circuit is made up of voltage stabilizing diode Z1 in the accompanying drawing 2), and voltage detecting circuit A is connected in the input circuit of this device; Voltage detecting circuit A output terminal is connected with photoelectrical coupler OPT1, and photoelectrical coupler OPT1 power supply energy is provided by storage capacitor C1.
The course of work: this voltage zero-cross pick-up unit passes through current-limiting resistance R1, rectification circuit D1 rectification to storage capacitor C1 energy storage during the non-zero passage of input voltage; When voltage detecting circuit A is output as low level during the input voltage zero passage; Storage capacitor C1 provides and drives work capacity driving photoelectrical coupler OPT1, output voltage zero passage detection signal.
Annotate: in this embodiment; Rectification circuit D1 be connected with current-limiting resistance R1 be regardless of before and after; Be that current-limiting resistance R1 can be placed on rectification circuit D1 input end and also can be placed on rectification circuit D1 output terminal; Principle of work is identical, and amplitude limiter circuit has two: voltage stabilizing diode Z1, voltage stabilizing diode Z2, when when input voltage is low, omitting; Among the voltage detecting circuit A, R2 is a current-limiting resistance, and IC1 is voltage monitoring IC.
Voltage zero-cross pick-up unit shown in accompanying drawing 3; J1, J2 are the input endpoint of voltage zero-cross pick-up unit input circuit; J3, J4 are this voltage zero-cross pick-up unit exit point; Input signal is given storage capacitor C1 energy storage through current-limiting resistance R1, rectification circuit BR1, diode D1 (stop storage capacitor C1 current reflux when diode D1 is used in the input voltage zero passage, the voltage zero-cross of avoiding having influence on voltage detecting circuit A detects); (amplitude limiter circuit is made up of voltage stabilizing diode Z1 in the accompanying drawing 3 to be connected with amplitude limiter circuit Z1 in the rectification circuit BR1 output loop; When voltage detecting circuit A was built-in with amplitude limiter circuit, amplitude limiter circuit Z1 can omit), voltage detecting circuit A input end is connected with rectification circuit BR1 output terminal; Voltage detecting circuit A output terminal is connected with photoelectrical coupler OPT1, and photoelectrical coupler OPT1 provides the driving work capacity by storage capacitor C1.
The course of work: this voltage zero-cross pick-up unit during the non-zero passage of input voltage through current-limiting resistance R1 current limliting, rectification circuit BR1 rectification, amplitude limiter circuit Z1 amplitude limit, again through diode D1 to storage capacitor C1 energy storage; When voltage detecting circuit A is output as low level during the input voltage zero passage; Photoelectrical coupler OPT1 input end provides work capacity by storage capacitor C1, photoelectrical coupler OPT1 output zero passage detection signal.
Annotate: in this embodiment; Because short approximately a few microsecond to tens microseconds of compole when driving the output zero cross signal; Storage capacitor C1 energy consumption is very low; The storage capacitor C1 time has been in a kind of electricity condition that is full of during driving the output zero cross signal, and what this installed that whole input circuit appears is high-impedance state (promptly appearing resistive but not capacitive), and the output voltage zero cross signal can not produce additional phase shift; Voltage detecting circuit A; Can use voltage monitoring IC, comparer or transistor discrete component circuit to form; Because circuit is not simply just given unnecessary details at this; In this embodiment accompanying drawing, amplitude limiter circuit Z1 is connected the output terminal of rectification circuit BR1, in practical application, also can be connected in the input circuit of rectification circuit BR1 (amplitude limiter circuit Z1 changes two voltage stabilizing diode anti-phases series connection into by single voltage stabilizing diode of accompanying drawing 3 and gets final product); Or being connected the storage capacitor C1 two ends in the rectification circuit BR1 output loop, principle of work is identical.
Voltage zero-cross pick-up unit shown in accompanying drawing 4; J1, J2 are voltage zero-cross pick-up unit input endpoint; J3, J4 are this voltage zero-cross pick-up unit exit point; Input signal is isolated through current-limiting resistance R1, rectification circuit BR1, diode element D1, gives storage capacitor C1 energy storage, and rectification circuit BR1 input circuit is connected with the amplitude limiter circuit of being made up of voltage stabilizing diode Z1 and voltage stabilizing diode Z2 differential concatenation; Voltage detecting circuit A input end is connected with rectification circuit BR1 output terminal; Voltage detecting circuit A working power end is connected with storage capacitor C1, and voltage detecting circuit A output terminal is connected with photoelectrical coupler OPT1, and photoelectrical coupler OPT1 drives work capacity and provided by storage capacitor C1.
The course of work: this voltage zero-cross pick-up unit passes through current-limiting resistance R1 current limliting, amplitude limiter circuit amplitude limit, rectification circuit BR1 rectification, passes through diode D1 to storage capacitor C1 energy storage again during the non-zero passage of input voltage; When voltage detecting circuit A is output as high level during the input voltage zero passage; Photoelectrical coupler OPT1 input end provides work capacity by storage capacitor C1, photoelectrical coupler OPT1 output zero passage detection signal.
Annotate: embodiment 3 and be with embodiment 4 main difference parts, voltage detecting circuit A has a working power to be connected to storage capacitor C1 end, and the voltage detecting circuit that is suitable for needing burning voltage to work uses; The amplitude limiter circuit of being made up of voltage stabilizing diode Z1, Z2 that is connected with rectification circuit BR1 input circuit fully also can be connected at (as: rectification circuit BR1 rectification output end, storage capacitor C1 two ends) in the rectification circuit BR1 output loop, and principle of work is identical.
Operating passing zero switch shown in accompanying drawing 5; J1, J2 are the input and output end points of major loop K switch M1 (accompanying drawing 5 major loop K switch M1 are mechanical switch); Voltage zero-cross pick-up unit C is connected with major loop K switch M1; The output terminal of voltage zero-cross pick-up unit C is connected with control circuit B with major loop K switch M1 control end, and J3, J4 are the power input mouth of control circuit B, and J5, J6 are that control circuit B control port is (when the zero passage fling-cut switch is the closure that powers on; Outage disjunction control mode, J5, J6 control port can omit).
The course of work: control circuit B gets; As the control port J5 of control circuit B, when the J6 input has control signal; Control circuit B is according to the zero passage voltage signal of voltage zero-cross pick-up unit C input; Control circuit B begins to open timer internal regularly, calculates control circuit B and outputs to the retardation time of the control signal of mechanical switch KM1 control coil with respect to voltage over zero according to the control coil of mechanical switch KM1 closed time of mechanical switch KM1 that powers on, and makes that machinery K switch M1 connects when voltage zero-cross; During the control coil of control circuit B output driving device K switch M1; Control circuit B constantly detects the voltage zero-crossing signal by voltage zero-cross pick-up unit C input, is not in the claimed range of point of zero voltage like mechanical switch KM1 closure, the memory data in the Correction and Control circuit B; So that next time is the voltage zero-cross input accurately, this switch is well suited for electric capacity even load no-flashy-flow input.
Operating passing zero switch shown in accompanying drawing 6; J1, J2 are major loop switch power semiconductor SCR1 (accompanying drawing 6 power semiconductor SCR1 are thyristor) input and output end points; Voltage zero-cross pick-up unit C is connected with major loop switch S CR1; The output terminal of voltage zero-cross pick-up unit C is connected with control circuit B with major loop switch S CR1 control end, and J3, J4 are the power input mouth of control circuit B, and J5, J6 are that control circuit B control port is (when the zero passage fling-cut switch is the closure that powers on; Outage disjunction control mode, J5, J6 control port can omit).
The course of work: control circuit B gets; As the control port J5 of control circuit B, when the J6 input has control signal; Control circuit B is during voltage zero-cross pick-up unit C input has the zero passage voltage signal; Control major loop switch S CR1 voltage zero-cross is connected, and can reach the purpose that load (like electric capacity) voltage zero-cross is dropped into, and elimination is connected to shove and impacted the major loop switch power semiconductor SCR1 and the influence in load capacitance life-span; As control circuit B during in the no control signal of control port J5, J6 input, control circuit B controls major loop switch S CR1 and closes.
Operating passing zero switch shown in accompanying drawing 7; The major loop switch is composed in parallel by power semiconductor SCR1 and mechanical switch KM1; J1, J2 are the input and output end points of major loop switch, and voltage zero-cross pick-up unit C is connected with the major loop switch, and the control end of the output terminal of voltage zero-cross pick-up unit C, major loop switch S CR1 and the control end of mechanical switch KM1 are connected with control circuit B; J3, J4 are the power input mouth of control circuit B; J5, J6 are control circuit B control port (when the zero passage fling-cut switch is the closure that powers on, outage disjunction control mode, J5, J6 control port can omit).
The course of work: control circuit B gets; As the control port J5 of control circuit B, when the J6 input has control signal; Control circuit B is during voltage zero-cross pick-up unit C input has the zero passage voltage signal, and control major loop switch S CR1 voltage zero-cross is connected, and controls mechanical K switch M1 then and connects; Reach the purpose that electric capacity even load no-flashy-flow is dropped into, eliminate and connect the impact of shoving the major loop switch power semiconductor SCR1 and the influence in load capacitance life-span; As control circuit B during in the no control signal of control port J5, J6 input, mechanical K switch M1 disjunction is controlled in control circuit B control major loop switch S CR1 conducting then, and mechanical switch KM1 divides and has no progeny, and closes power semiconductor SCR1, the completion breaking course.
Claims (10)
1. a voltage zero-cross pick-up unit comprises current-limiting resistance, photoelectrical coupler, it is characterized in that it also comprises: rectification circuit, storage capacitor, voltage detecting circuit; Said current-limiting resistance is connected with said rectification circuit; Said rectification circuit output loop connects said storage capacitor; Said voltage detecting circuit is connected in the input circuit; Said voltage detecting circuit output terminal is connected with said photoelectrical coupler, and said voltage detecting circuit is controlled said photoelectrical coupler output voltage zero cross signal when voltage zero-cross, and the work capacity of said photoelectrical coupler is provided by said storage capacitor.
2. voltage zero-cross pick-up unit according to claim 1; It is characterized in that said voltage detecting circuit input end is connected with said rectification circuit output end; Said voltage detecting circuit output terminal is connected with said photoelectrical coupler, and said rectification circuit output end is connected with said storage capacitor through diode.
3. voltage zero-cross pick-up unit according to claim 1 is characterized in that said rectification circuit output loop is connected with amplitude limiter circuit.
4. voltage zero-cross pick-up unit according to claim 1 is characterized in that said rectification circuit input circuit is connected with amplitude limiter circuit.
5. voltage zero-cross pick-up unit according to claim 1 is characterized in that said voltage detecting circuit working power end is connected to said storage capacitor.
6. operating passing zero switch; It is characterized in that comprising voltage zero-cross pick-up unit, major loop switch, control circuit according to 1 to 5 any of right; Said voltage zero-cross pick-up unit input end is connected with said major loop switch; Said voltage zero-cross pick-up unit output terminal is connected with said control circuit, and said control circuit is connected with said major loop switch control end, and said control circuit is connected with power supply.
7. operating passing zero switch according to claim 6 is characterized in that said control circuit is connected with control port.
8. operating passing zero switch according to claim 6 is characterized in that said major loop switch is a mechanical switch.
9. operating passing zero switch according to claim 6 is characterized in that said major loop switch is a power semiconductor.
10. operating passing zero switch according to claim 6 is characterized in that said major loop switch is composed in parallel by mechanical switch and power semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110279188.4A CN102323472B (en) | 2011-09-08 | Voltage zero-cross detection device and operating passing zero switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110279188.4A CN102323472B (en) | 2011-09-08 | Voltage zero-cross detection device and operating passing zero switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102323472A true CN102323472A (en) | 2012-01-18 |
| CN102323472B CN102323472B (en) | 2016-12-14 |
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| CN103280816A (en) * | 2013-05-17 | 2013-09-04 | 浙江大学 | Thyristor zero-crossing triggering device based on non-linear sampling |
| CN104991111A (en) * | 2015-06-30 | 2015-10-21 | 重庆大学 | Wide-range alternating current signal zero-cross detection method and device |
| CN105510681A (en) * | 2016-01-28 | 2016-04-20 | 南京交通职业技术学院 | Nonlinear current sampling assembly |
| CN106847582A (en) * | 2016-01-24 | 2017-06-13 | 广州市金矢电子有限公司 | Arc extinguishing power device drive device and arc-control device |
| CN106980039A (en) * | 2016-01-24 | 2017-07-25 | 广州市金矢电子有限公司 | Zero crossing detection device and synchro switch |
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| CN109084446B (en) * | 2018-08-23 | 2019-09-13 | 奥克斯空调股份有限公司 | A kind of air conditioning control method, device and air conditioner |
| CN109084446A (en) * | 2018-08-23 | 2018-12-25 | 奥克斯空调股份有限公司 | A kind of air conditioning control method, device and air conditioner |
| CN110139443A (en) * | 2019-05-27 | 2019-08-16 | 青岛亿联客信息技术有限公司 | Clear net device, fixture and the clear network control method of electrical equipment |
| CN113190073A (en) * | 2021-05-10 | 2021-07-30 | 深圳市海和科技股份有限公司 | Load control method and device |
| CN114252689A (en) * | 2021-12-08 | 2022-03-29 | 杭州联芯通半导体有限公司 | Zero-crossing detection circuit |
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