CN103956886A - Circuit for allowing alternating-current electric equipment to form control signals at two states - Google Patents
Circuit for allowing alternating-current electric equipment to form control signals at two states Download PDFInfo
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- CN103956886A CN103956886A CN201410196629.8A CN201410196629A CN103956886A CN 103956886 A CN103956886 A CN 103956886A CN 201410196629 A CN201410196629 A CN 201410196629A CN 103956886 A CN103956886 A CN 103956886A
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Abstract
The invention discloses a circuit for allowing alternating-current electric equipment to form control signals at two states. The circuit is composed of an alternating-current power supply and state control switch, an electromagnetic interference restraining circuit and a control signal forming circuit. Two alternating-current power supply switching-on/switching-off control switches arranged in the alternating-current electric equipment control whether the current flows through an input light-emitting diode of a two-way optical coupling circuit U or not through one of two differential mode capacitors connected to a phase line and restraining electromagnetic interference, and state control signals of two types of direct-current levels are formed through output of the two-way optical coupling circuit U.
Description
Technical field
The present invention relates to state control signal and form circuit, particularly a kind of AC electric equipment forms the circuit of two states control signal.
Background technology
In AC electric equipment, often there is the demand that its operating state is controlled.As the rotating speed of motor, the height of output dc voltage, the control of brightness of fluorescent lamp or light-emitting diode etc., all needs first to form a control signal.Therefore, produce the direct current low level control signal of varying level, be I of a kind of the most frequently used control also New Year soon.
CN202587567U discloses a kind of fluorescent lamp ballast three-stage dimming control signal and has formed circuit, adopts a three-position switch, by or connect the phase line of power supply, or connect the center line of power supply, or the unsettled method that obtains three kinds of varying level control signals.
The disclosed a kind of staged-dimming control signal control circuit for electronic ballast of CN201298957Y, comprise two power control switch, the two route rectifier diodes that structure is identical and separate, current-limiting resistance, photoelectrical coupler, the isolation that charging resistor and filtering capacitor form and low and high level form circuit, and the controlled D/A converting circuit that forms of a pair of interlock switch consisting of four switching tubes and resistor network, the make-and-break signal of switch are converted to the digital signal of high and low level.
Summary of the invention
Technical problem to be solved by this invention is: in AC electric equipment, formation state is controlled the control signal of required height and low two level.
Technical scheme of the present invention is, by AC power and state control switch 10, electromagnetic interference suppression circuit 20 and control signal form circuit 30 and form, it is characterized in that, the phase line L of AC power connects control switch K1 and the K2 in described AC power and state control switch 10, and the other end of control switch K1 and K2 is connected respectively the common mode inductance L of described electromagnetic interference suppression circuit 20
eMI1 and differential mode capacitor Cx1, Cx2, differential mode capacitor Cx1 is by current-limiting resistance R1, the input light-emitting diode one end that connects two-way optocoupler circuit U 1, differential mode capacitor Cx2 connects the input light-emitting diode other end of two-way optocoupler circuit U 1, the output transistor collector electrode of two-way optocoupler circuit U 1, connect low-voltage dc voltage+Vdc, the output transistor emitter of two-way optocoupler circuit U 1, connect output resistance R2, when K switch 1 or K2 connection, export a kind of level, when K switch 1 and K2 connect, export another kind of level controling signal simultaneously.
The phase line L of described AC power connects control switch K1 and the K2 in described AC power and state control switch 10, and the other end of control switch K1 and K2 is connected respectively the common mode inductance L of described electromagnetic interference suppression circuit 20
eMIone end of 1, inductance L
eMI1 the other end, connect respectively differential mode capacitor Cx1, Cx2, differential mode capacitor Cx1 is by current-limiting resistance R1, the input light-emitting diode one end that connects two-way optocoupler circuit U 1, differential mode capacitor Cx2 connects the input light-emitting diode other end of two-way optocoupler circuit U 1, the output transistor collector electrode of two-way optocoupler circuit U 1, connect low-voltage dc voltage+Vdc, the output transistor emitter of two-way optocoupler circuit U 1, connect output resistance R2, when K switch 1 or K2 connection, export a kind of level, when K switch 1 and K2 connect simultaneously, export another kind of level controling signal.
It is two-way photoelectric coupled circuit U1 that described control signal forms circuit 30, the input light-emitting diode of two-way optocoupler circuit U 1 is connected with differential mode capacitor Cx1, the Cx2 of electromagnetic interference suppression circuit respectively through current-limiting resistance R1, the output of U1, to connect low-voltage dc voltage+Vdc at collector electrode, emitter connects output resistance R2, and the voltage in resistance R 2 is output control signal level.
K switch 1 in described AC power and state control switch 10 and K2 can be mechanical switchs, or electronic switch.
Advantage of the present invention is, circuit is more simple, increase by a road power control switch, with two double state control switch of doing of power control switch, utilize the electromagnetic interference that is connected on that all will configure in high-performance power consumption equipment to suppress the differential mode capacitor on common mode inductance, by a two-way optocoupler, formation state is controlled the control signal of required high and low two level.
Accompanying drawing explanation
Fig. 1 is before circuit theory diagrams-differential mode capacitor of the present invention is connected on common mode inductance.
Fig. 2 is after circuit theory diagrams-differential mode capacitor of the present invention is connected on common mode inductance.
Number in the figure explanation
。
Embodiment
The present invention is by AC power and state control switch 10, and electromagnetic interference suppression circuit 20 and control signal form circuit 30 and form.
According to the common mode inductance being determined by electromagnetic interference inhibition and differential mode capacitor front and back position, there are two kinds of different connected modes.
Consult accompanying drawing 1, before differential mode capacitor is connected on common mode inductance, the phase line L of AC power connects control switch K1 and the K2 in described AC power and state control switch 10, and the other end of control switch K1 and K2 is connected respectively the common mode inductance L of described electromagnetic interference suppression circuit 20
eMI1 and differential mode capacitor Cx1, Cx2, differential mode capacitor Cx1 is by current-limiting resistance R1, the input light-emitting diode one end that connects two-way optocoupler circuit U 1, differential mode capacitor Cx2 connects the input light-emitting diode other end of two-way optocoupler circuit U 1, the output transistor collector electrode of two-way optocoupler circuit U 1, connect low-voltage dc voltage+Vdc, the output transistor emitter of two-way optocoupler circuit U 1, connect output resistance R2, when K switch 1 or K2 connection, export a kind of level, when K switch 1 and K2 connect, export another kind of level controling signal simultaneously.
Consult accompanying drawing 2, after differential mode capacitor is connected on common mode inductance, the phase line L of described AC power connects control switch K1 and the K2 in described AC power and state control switch 10, and the other end of control switch K1 and K2 is connected respectively the common mode inductance L of described electromagnetic interference suppression circuit 20
eMIeach one end of 1, inductance L
eMIeach other end of 1, connect respectively differential mode capacitor Cx1, Cx2, differential mode capacitor Cx1 is by current-limiting resistance R1, the input light-emitting diode one end that connects two-way optocoupler circuit U 1, differential mode capacitor Cx2 connects the input light-emitting diode other end of two-way optocoupler circuit U 1, the output transistor collector electrode of two-way optocoupler circuit U 1, connect low-voltage dc voltage+Vdc, the output transistor emitter of two-way optocoupler circuit U 1, connect output resistance R2, when K switch 1 or K2 connection, export a kind of level, when K switch 1 and K2 connect simultaneously, export another kind of level controling signal.
It is two-way photoelectric coupled circuit U1 that described control signal forms circuit 30, the input light-emitting diode of two-way optocoupler circuit U 1 is connected with differential mode capacitor Cx1, the Cx2 of electromagnetic interference suppression circuit respectively through current-limiting resistance R1, the output of U1, to connect low-voltage dc voltage+Vdc at collector electrode, emitter connects output resistance R2, and the voltage in resistance R 2 is output control signal level.
K switch 1 in described AC power and state control switch 10 and K2 can be mechanical switchs, or electronic switch.
The present invention, also controls the generation of state control signal with control switch K1 and control switch K2 when the power supply of AC electric equipment is carried out to on/off control.
The input of consulting 1, two control switch K1 of accompanying drawing and K2 is all connected with power supply phase line L.The output termination electromagnetic interference of control switch K1 suppresses common mode inductance L
eMIinput 1 pin of 1 winding N1, one end of differential mode capacitor Cx1, and one end of current-limiting resistance R1.The output termination electromagnetic interference of control switch K2 suppresses common mode inductance L
eMIinput 3 pin of 1 winding N2, one end of differential mode capacitor Cx2, and 2 pin of two-way optocoupler circuit U 1 input light-emitting diode.The other end of differential mode capacitor Cx1 and differential mode capacitor Cx2 and power supply center line N and electromagnetic interference suppress common mode inductance L
eMI5 pin of 1 winding N3 are connected.Electromagnetic interference suppresses common mode inductance L
eMIoutput 2 pin of 1 winding N1 connect an ac input end " ~ " of bridge rectifier D 1, and electromagnetic interference suppresses common mode inductance L
eMIoutput 6 pin of 1 winding N3 connect another ac input end " ~ " of bridge rectifier D 1.Electromagnetic interference suppresses common mode inductance L
eMIoutput 4 pin of 1 winding N2 and the negative pole of rectifier diode D2 and the positive pole of rectifier diode D3 are connected together, "-" output and the ground wire GND of the positive pole of rectifier diode D2 and bridge rectifier D 1 are connected together, "+" output of the negative pole of rectifier diode D3 and bridge rectifier D 1 and the anode of filter capacitor C1 are connected together, and the negative terminal of filter capacitor C1 is earth connection GND also.By bridge rectifier D 1, rectifier diode D2, D3, the current rectifying and wave filtering circuit that filter capacitor C1 forms when one of control switch K1 and K2 connect or connect simultaneously, the direct voltage that output AC power consumption equipment needs.1 pin of another termination bi-directional light coupling circuit U 1 input light-emitting diode of current-limiting resistance R1.Collector electrode 3 pin of two-way optocoupler circuit U 1 output transistor meet low-voltage dc voltage+Vdc, emitter 4 pin of two-way optocoupler circuit U 1 output transistor connect one end of output resistance R2, the other end ground connection of output resistance R2,4 pin of two-way optocoupler circuit U 1 and the tie point of output resistance R2 are as the output point A of state control signal.
When control switch K1 connection and control switch K2 shutoff, from control switch K1 output, through current-limiting resistance R1, enter 1 pin of two-way photoelectric coupled circuit input light-emitting diode, from 2 pin of two-way photoelectric coupled circuit input light-emitting diode out, through differential mode capacitor Cx2, to power supply center line N, there is current flowing.At control switch K1, turn-off and when control switch K2 connects, 2 pin from control switch K2 output through two-way photoelectric coupled circuit input light-emitting diode, from 1 pin of two-way photoelectric coupled circuit input light-emitting diode out, through current-limiting resistance R1, differential mode capacitor Cx1, to power supply center line N, has current flowing.When control switch K1 and K2 connect, differential mode capacitor Cx1 and Cx2 meet power supply phase line L through control switch K1 and K2 simultaneously, between one end of current-limiting resistance R1 and 2 pin of two-way optocoupler circuit U 1, in idiostatic, in two-way optocoupler circuit U 1 input light-emitting diode, there is no current flowing.
When control switch K1 and or one of K2 while connecting, the input light-emitting diode of two-way optocoupler circuit U 1 has current flowing, the output transistor conducting of two-way optocoupler circuit U 1, from the output point A output high-level control signal of state control signal.When control switch K1 and K2 connect simultaneously, in the input light-emitting diode of two-way optocoupler circuit U 1, there is no current flowing, the output transistor cut-off of two-way optocoupler circuit U 1, from the output point A output low level control signal of state control signal.
Because differential mode capacitor Cx is connected on common mode inductance L
eMIbefore 1, be still connected on common mode inductance L
eMIafter 1, be to be determined by the effect that electromagnetic interference is suppressed of reality.When differential mode capacitor C x1 and Cx2 are connected on common mode inductance L
eMIin the time of after 1, described control signal formation circuit 30 is also followed differential mode capacitor Cx and is connected on electromagnetic interference inhibition common mode inductance L
eMIafter 1, as shown in Figure 2.
The input of consulting 2, two control switch K1 of accompanying drawing and K2 is all connected with power supply phase line L.The output termination electromagnetic interference of control switch K1 suppresses common mode inductance L
eMIinput 1 pin of 1 winding N1, the output termination electromagnetic interference of control switch K2 suppresses common mode inductance L
eMIinput 3 pin of 1 winding N2.Power supply center line N meets common mode inductance L
eMIinput 5 pin of 1 winding N3.Electromagnetic interference suppresses common mode inductance L
eMIoutput 2 pin of 1 winding N1, one end of differential mode capacitor Cx1, and an ac input end " ~ " of a termination bridge rectifier D 1 of current-limiting resistance R1.Electromagnetic interference suppresses common mode inductance L
eMIoutput 4 pin of 1 winding N2, one end of differential mode capacitor Cx2, and 2 pin of two-way optocoupler circuit U 1 input light-emitting diode, be connected together with the negative pole of rectifier diode D2 and the positive pole of rectifier diode D3.The other end of differential mode capacitor Cx1 and differential mode capacitor Cx2 and common mode inductance L
eMI6 pin of 1 winding N3 are connected, and connect another ac input end " ~ " of bridge rectifier D1."-" output of the positive pole of rectifier diode D2 and bridge rectifier D 1, the negative terminal of filter capacitor C1 and ground wire GND are connected together, and "+" output of the negative pole of rectifier diode D3 and bridge rectifier D 1 and the anode of filter capacitor C1 are connected together.By bridge rectifier D 1, rectifier diode D2, D3, the current rectifying and wave filtering circuit that filter capacitor C1 forms when one of control switch K1 and K2 connect or connect simultaneously, the direct voltage that output AC power consumption equipment needs.One end is connected on 1 pin of another termination bi-directional light coupling circuit U 1 input light-emitting diode of the current-limiting resistance R1 on differential mode capacitor Cx1, and 2 pin of two-way optocoupler circuit U 1 input light-emitting diode are connected on differential mode capacitor Cx2.3 pin of two-way optocoupler circuit U 1 output transistor meet low-voltage dc voltage+Vdc, 4 pin of two-way optocoupler circuit U 1 output transistor connect one end of output resistance R2, the other end ground connection of output resistance R2,4 pin of two-way optocoupler circuit U 1 and the tie point of output resistance R2 are as the output point A of state control signal.
Situation with Fig. 1 is identical, at control switch K1, connect and when control switch K2 turn-offs, from control switch K1 output through common mode inductance L
eMI1 winding N1, current-limiting resistance R1, enters 1 pin of two-way optocoupler circuit U 1 input light-emitting diode, from 2 pin of two-way optocoupler circuit U 1 input light-emitting diode out, through differential mode capacitor Cx2, to power supply center line N, has current flowing.At control switch K1, turn-off and when control switch K2 connects, from control switch K2 output through common mode inductance L
eMI1 winding N2,2 pin of two-way optocoupler circuit U 1 input light-emitting diode, from 1 pin of two-way optocoupler circuit U 1 input light-emitting diode out, through current-limiting resistance R1, differential mode capacitor Cx1, to power supply center line N, has current flowing.When control switch K1 and K2 connect, differential mode capacitor Cx1 and Cx2 meet power supply phase line L through control switch K1 and K2 simultaneously, between one end of current-limiting resistance R1 and 2 pin of two-way optocoupler circuit U 1, in idiostatic, in two-way optocoupler circuit U 1 input light-emitting diode, there is no current flowing.
When control switch K1 and or one of K2 while connecting, the input light-emitting diode of two-way optocoupler circuit U 1 has current flowing, the output transistor conducting of two-way optocoupler circuit U 1, from the output point A output high-level control signal of state control signal.When control switch K1 and K2 connect simultaneously, in the input light-emitting diode of two-way optocoupler circuit U 1, there is no current flowing, the output transistor cut-off of two-way optocoupler circuit U 1, from the output point A output low level control signal of state control signal.
Claims (4)
1. an AC electric equipment forms the circuit of two states control signal, by AC power and state control switch 10, electromagnetic interference suppression circuit 20 and control signal form circuit 30 and form, it is characterized in that, the phase line L of AC power connects control switch K1 and the K2 in described AC power and state control switch 10, and the other end of control switch K1 and K2 is connected respectively the common mode inductance L of described electromagnetic interference suppression circuit 20
eMI1 and differential mode capacitor Cx1, Cx2, differential mode capacitor Cx1 is by current-limiting resistance R1, the input light-emitting diode one end that connects two-way optocoupler circuit U 1, differential mode capacitor Cx2 connects the input light-emitting diode other end of two-way optocoupler circuit U 1, the output transistor collector electrode of two-way optocoupler circuit U 1, connect low-voltage dc voltage+Vdc, the output transistor emitter of two-way optocoupler circuit U 1, connect output resistance R2, when K switch 1 or K2 connection, export a kind of level, when K switch 1 and K2 connect, export another kind of level controling signal simultaneously.
2. by a kind of AC electric equipment claimed in claim 1, form the circuit of two states control signal, it is characterized in that, the phase line L of described AC power connects control switch K1 and the K2 in described AC power and state control switch 10, and the other end of control switch K1 and K2 is connected respectively the common mode inductance L of described electromagnetic interference suppression circuit 20
eMIone end of 1, inductance L
eMI1 the other end, connect respectively differential mode capacitor Cx1, Cx2, differential mode capacitor Cx1 is by current-limiting resistance R1, the input light-emitting diode one end that connects two-way optocoupler circuit U 1, differential mode capacitor Cx2 connects the input light-emitting diode other end of two-way optocoupler circuit U 1, the output transistor collector electrode of two-way optocoupler circuit U 1, connect low-voltage dc voltage+Vdc, the output transistor emitter of two-way optocoupler circuit U 1, connect output resistance R2, when K switch 1 or K2 connection, export a kind of level, when K switch 1 and K2 connect simultaneously, export another kind of level controling signal.
3. by a kind of AC electric equipment claimed in claim 1, form the circuit of two states control signal, it is characterized in that, it is two-way photoelectric coupled circuit U1 that described control signal forms circuit 30, the input light-emitting diode of two-way optocoupler circuit U 1 is connected with differential mode capacitor Cx1, the Cx2 of electromagnetic interference suppression circuit respectively through current-limiting resistance R1, the output of U1, be to connect low-voltage dc voltage+Vdc at collector electrode, emitter connects output resistance R2, and the voltage in resistance R 2 is output control signal level.
4. by a kind of AC electric equipment claimed in claim 1, form the circuit of two states control signal, it is characterized in that, the K switch 1 in described AC power and state control switch 10 and K2 can be mechanical switchs, or electronic switch.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410196629.8A CN103956886B (en) | 2014-05-12 | 2014-05-12 | A kind of AC electric equipment forms the circuit of two states control signal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410196629.8A CN103956886B (en) | 2014-05-12 | 2014-05-12 | A kind of AC electric equipment forms the circuit of two states control signal |
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| CN103956886A true CN103956886A (en) | 2014-07-30 |
| CN103956886B CN103956886B (en) | 2016-10-05 |
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| CN201410196629.8A Active CN103956886B (en) | 2014-05-12 | 2014-05-12 | A kind of AC electric equipment forms the circuit of two states control signal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114051369A (en) * | 2021-09-30 | 2022-02-15 | 苏州浪潮智能科技有限公司 | Electromagnetic interference suppression device and server |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203101588U (en) * | 2012-12-14 | 2013-07-31 | 滁州安瑞电力自动化有限公司 | AC power switching value acquisition circuit |
| CN203883663U (en) * | 2014-05-12 | 2014-10-15 | 上海阿卡得电子有限公司 | A circuit for generating control signals of two states for alternating current electric equipment |
-
2014
- 2014-05-12 CN CN201410196629.8A patent/CN103956886B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203101588U (en) * | 2012-12-14 | 2013-07-31 | 滁州安瑞电力自动化有限公司 | AC power switching value acquisition circuit |
| CN203883663U (en) * | 2014-05-12 | 2014-10-15 | 上海阿卡得电子有限公司 | A circuit for generating control signals of two states for alternating current electric equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114051369A (en) * | 2021-09-30 | 2022-02-15 | 苏州浪潮智能科技有限公司 | Electromagnetic interference suppression device and server |
| CN114051369B (en) * | 2021-09-30 | 2023-11-14 | 苏州浪潮智能科技有限公司 | Electromagnetic interference suppression device and server |
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| Publication number | Publication date |
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| CN103956886B (en) | 2016-10-05 |
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