CN102411082A - Energy-saving zero crossing detection circuit and apparatus thereof - Google Patents

Energy-saving zero crossing detection circuit and apparatus thereof Download PDF

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Publication number
CN102411082A
CN102411082A CN201110215755XA CN201110215755A CN102411082A CN 102411082 A CN102411082 A CN 102411082A CN 201110215755X A CN201110215755X A CN 201110215755XA CN 201110215755 A CN201110215755 A CN 201110215755A CN 102411082 A CN102411082 A CN 102411082A
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CN
China
Prior art keywords
capacitor
detection circuit
resistance
pin
optocoupler
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Pending
Application number
CN201110215755XA
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Chinese (zh)
Inventor
廖黎利
袁天龙
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Shenzhen H&T Intelligent Control Co Ltd
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Shenzhen H&T Intelligent Control Co Ltd
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Priority to CN201110215755XA priority Critical patent/CN102411082A/en
Publication of CN102411082A publication Critical patent/CN102411082A/en
Pending legal-status Critical Current

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Abstract

The invention, which is suitable for the electronic circuit field, provides an energy-saving zero crossing detection circuit and an apparatus thereof. The zero crossing detection circuit comprises an optical coupler U1, a divider resistor R3, a diode D1, a resistor R2, and a capacitor C1. Pins 1 and 2 of the optical coupler U1 are respectively connected to an output terminal and an input terminal of the diode D1; the pin 1 of the optical coupler U1 is connected with one end of the divider resistor R3; and the pin 2 of the optical coupler U1 is connected with one end of the capacitor C1. And the other ends of the divider resistor R3 and the capacitor C1 are respectively connected to an anode and a cathode of a power input. Besides, a pin 4 of the optical coupler U1 is connected with one end of the resistor R2 and the other end of the resistor R2 is connected with a reference voltage VCC; and a pin 3 of the optical coupler U1 is earthed to ground (GND). According to the invention, a capacitor C1 is in tandem with an AC line and work done by the capacitor is wattles power, so that power consumption of the zero crossing detection circuit is reduced.

Description

A kind of energy-saving zero cross detection circuit and device
Technical field
The invention belongs to electronic circuit field, relate in particular to a kind of energy-saving zero cross detection circuit and device.
Background technology
A lot of household electrical appliances/consumption electronic products need the standard of zero cross signal as single-chip microcomputer, and the starting point of this standard is exactly a no-voltage, and thyristor operating angle is used this standard exactly.Motor is high, in, low, all corresponding conduction angle of the various power of little grade of speed and other loads, and the ON time of each conduction angle begins to calculate from no-voltage, ON time is different, so the power of rotating speed of motor and load is different.Zero passage detection can also provide a timing pulse signal, as the timing base of system.Be used for detecting whether zero cross signal is arranged.
See also Fig. 1,2,3, be existing 3 kinds of zero cross detection circuits.Wherein, Fig. 1 shows the triode zero cross detection circuit, Fig. 2 shows the resistance-type zero cross detection circuit.Because these two kinds of circuit are non-buffer circuit, it exists dangerous, the defective that antijamming capability is more weak.Fig. 3 shows light-coupled isolation formula zero cross detection circuit.This light-coupled isolation formula zero cross detection circuit is a buffer circuit, increases the security of plate, has improved anti-interference, but because the characteristic of optocoupler minimum current conducting, its power consumption is bigger, is difficult to reach the low-power consumption standby standard.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of energy-saving zero cross detection circuit, and it is bigger to be intended to solve existing zero cross detection circuit power consumption, is difficult to reach the problem of low-power consumption standard.
The embodiment of the invention is achieved in that a kind of energy-saving zero cross detection circuit, and said circuit comprises optocoupler U1, divider resistance R3, diode D1, resistance R 2 and capacitor C 1,
The pin 1,2 of said optocoupler U1 is connected respectively to output terminal and the input end of said diode D1; The pin 1 of said optocoupler U1 also links to each other with the end of divider resistance R3; The pin 2 of said optocoupler U1 also links to each other with capacitor C 1 one ends, and the other end of said divider resistance R3, capacitor C 1 is connected to the both positive and negative polarity of power supply input respectively;
The pin 4 of said optocoupler U1 links to each other with an end of resistance R 2, and the other end of said resistance R 2 links to each other with reference voltage VCC, the pin 3 ground connection GND of said optocoupler U1.
Further, said zero cross detection circuit also comprises the resistance R 1 that signal is cushioned, and said resistance R 1 links to each other with the pin 4 of optocoupler U1.
Further, said zero cross detection circuit also comprises capacitor C 2, and an end of said capacitor C 2 links to each other with the pin 4 of said optocoupler U1, other end ground connection GND.
Further, said zero cross detection circuit also comprises and capacitor C 1 parallel resistor R0, discharges for said capacitor C 1 through resistance R 0.
Further, the resistance value of said resistance R 0 is 1 M Ω.
Further, said reference voltage VCC is+5V.
Another purpose of the embodiment of the invention is to provide a kind of energy-saving zero crossing detection device; Said energy-saving zero crossing detection device comprises energy-saving zero cross detection circuit; Said zero cross detection circuit comprises optocoupler U1, divider resistance R3, diode D1, resistance R 2 and capacitor C 1
The pin 1,2 of said optocoupler U1 is connected respectively to output terminal and the input end of said diode D1; The pin 1 of said optocoupler U1 also links to each other with the end of divider resistance R3; The pin 2 of said optocoupler U1 also links to each other with capacitor C 1 one ends, and the other end of said divider resistance R3, capacitor C 1 is connected to the both positive and negative polarity of power supply input respectively;
The pin 4 of said optocoupler U1 links to each other with an end of resistance R 2, and the other end of said resistance R 2 links to each other with reference voltage VCC, the pin 3 ground connection GND of said optocoupler U1.
Further, said zero cross detection circuit also comprises the resistance R 1 that signal is cushioned, and said resistance R 1 links to each other with the pin 4 of optocoupler U1.
Further, said zero cross detection circuit also comprises capacitor C 2, and an end of said capacitor C 2 links to each other with the pin 4 of said optocoupler U1, other end ground connection GND.
Further, said zero cross detection circuit also comprises and capacitor C 1 parallel resistor R0, discharges for said capacitor C 1 through resistance R 0.
In an embodiment of the present invention, through the capacitor C 1 of on the AC line, having contacted, because capacitor C 1 is as a capacitive device, the electric current that flows through capacitor C 1 is the imaginary part electric current, and the merit that capacitor C 1 is done is a reactive power, thereby has reduced the power consumption of zero cross detection circuit.And under the situation that satisfies the minimum conducting electric current of optocoupler, can also obtain lower power consumption through the value of regulating resistance R 3 and capacitor C 1.Like this, just solved the high problem of traditional zero cross detection circuit power consumption.
Description of drawings
Fig. 1 is the circuit structure diagram of the triode zero cross detection circuit that provides of prior art;
Fig. 2 is the circuit structure diagram of the resistance-type zero cross detection circuit that provides of prior art;
Fig. 3 is the circuit structure diagram of the light-coupled isolation formula zero cross detection circuit that provides of prior art;
Fig. 4 is the circuit structure diagram of the zero cross detection circuit that provides of first embodiment of the invention;
Fig. 5 is the circuit structure diagram of the zero cross detection circuit that provides of second embodiment of the invention.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Fig. 4 shows the circuit structure of the zero cross detection circuit that first embodiment of the invention provides.This zero cross detection circuit can be applied in the energy-conservation type zero crossing detection device.
This zero cross detection circuit comprises optocoupler U1, divider resistance R3, diode D1, resistance R 2 and capacitor C 1.The pin 1,2 of said optocoupler U1 is connected respectively to output terminal and the input end of said diode D1, and the pin 1 of said optocoupler U1 also links to each other with the end of divider resistance R3, and the pin 2 of said optocoupler U1 also links to each other with capacitor C 1 one ends.The other end of said divider resistance R3, capacitor C 1 is connected to the both positive and negative polarity of power supply input respectively.The pin 4 of said optocoupler U1 links to each other with an end of resistance R 2, and the other end of said resistance R 2 links to each other with reference voltage VCC, the pin 3 ground connection GND of said optocoupler U1.
Consult Fig. 5, second embodiment of this zero cross detection circuit has increased a plurality of elements on the basis of first embodiment.
As embodiments of the invention, said zero cross detection circuit also comprises the resistance R 1 that signal is cushioned, and said resistance R 1 links to each other with the pin 4 of optocoupler U1.
As embodiments of the invention, said zero cross detection circuit also comprises capacitor C 2, and an end of said capacitor C 2 links to each other with the pin 4 of said optocoupler U1, other end ground connection GND.
For the ease of solving the capacitance discharges problem, this zero cross detection circuit also comprises and capacitor C 1 parallel resistor R0, discharges for said capacitor C 1 through resistance R 0.The resistance value of this resistance R 0 can be 1 M Ω.
Certainly, in real process, can be on the basis of first embodiment, only increase in resistance R 1, capacitor C 2, the resistance R 0 one or two.
This energy-saving zero cross detection circuit is on the basis of the zero cross detection circuit of light-coupled isolation formula in the past; The capacitor C 1 of on the AC line, having contacted; Electric capacity is as a capacitive device; The electric current that flows through electric capacity is the imaginary part electric current, and the merit that electric capacity is done is a reactive power, thereby has reduced the power consumption of zero cross detection circuit.And under the situation that satisfies the minimum conducting electric current of optocoupler, can also obtain lower power consumption through the value of regulating R3 and C1.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. energy-saving zero cross detection circuit is characterized in that, said circuit comprises optocoupler U1, divider resistance R3, diode D1, resistance R 2 and capacitor C 1,
The pin 1,2 of said optocoupler U1 is connected respectively to output terminal and the input end of said diode D1; The pin 1 of said optocoupler U1 also links to each other with the end of divider resistance R3; The pin 2 of said optocoupler U1 also links to each other with capacitor C 1 one ends, and the other end of said divider resistance R3, capacitor C 1 is connected to the both positive and negative polarity of power supply input respectively;
The pin 4 of said optocoupler U1 links to each other with an end of resistance R 2, and the other end of said resistance R 2 links to each other with reference voltage VCC, the pin 3 ground connection GND of said optocoupler U1.
2. energy-saving zero cross detection circuit according to claim 1 is characterized in that, said zero cross detection circuit also comprises the resistance R 1 that signal is cushioned, and said resistance R 1 links to each other with the pin 4 of optocoupler U1.
3. energy-saving zero cross detection circuit according to claim 1 is characterized in that said zero cross detection circuit also comprises capacitor C 2, and an end of said capacitor C 2 links to each other with the pin 4 of said optocoupler U1, other end ground connection GND.
4. energy-saving zero cross detection circuit according to claim 1 is characterized in that, said zero cross detection circuit also comprises and capacitor C 1 parallel resistor R0, discharges for said capacitor C 1 through resistance R 0.
5. energy-saving zero cross detection circuit according to claim 4 is characterized in that, the resistance value of said resistance R 0 is 1 M Ω.
6. energy-saving zero cross detection circuit according to claim 1 is characterized in that, said reference voltage VCC is+5V.
7. energy-saving zero crossing detection device, said energy-saving zero crossing detection device comprises energy-saving zero cross detection circuit, it is characterized in that, said zero cross detection circuit comprises optocoupler U1, divider resistance R3, diode D1, resistance R 2 and capacitor C 1,
The pin 1,2 of said optocoupler U1 is connected respectively to output terminal and the input end of said diode D1; The pin 1 of said optocoupler U1 also links to each other with the end of divider resistance R3; The pin 2 of said optocoupler U1 also links to each other with capacitor C 1 one ends, and the other end of said divider resistance R3, capacitor C 1 is connected to the both positive and negative polarity of power supply input respectively;
The pin 4 of said optocoupler U1 links to each other with an end of resistance R 2, and the other end of said resistance R 2 links to each other with reference voltage VCC, the pin 3 ground connection GND of said optocoupler U1.
8. energy-saving zero crossing detection device according to claim 7 is characterized in that, said zero cross detection circuit also comprises the resistance R 1 that signal is cushioned, and said resistance R 1 links to each other with the pin 4 of optocoupler U1.
9. energy-saving zero crossing detection device according to claim 7 is characterized in that said zero cross detection circuit also comprises capacitor C 2, and an end of said capacitor C 2 links to each other with the pin 4 of said optocoupler U1, other end ground connection GND.
10. energy-saving zero crossing detection device according to claim 7 is characterized in that, said zero cross detection circuit also comprises and capacitor C 1 parallel resistor R0, discharges for said capacitor C 1 through resistance R 0.
CN201110215755XA 2011-07-29 2011-07-29 Energy-saving zero crossing detection circuit and apparatus thereof Pending CN102411082A (en)

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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102879633A (en) * 2012-09-25 2013-01-16 上海微频莱机电科技有限公司 Safety protective structure of zero-crossing detection circuit
CN102890184A (en) * 2012-10-25 2013-01-23 德讯科技股份有限公司 Optocoupler-based zero passage detecting circuit
CN103683956A (en) * 2013-12-23 2014-03-26 上海贝岭股份有限公司 Low-power-consumption capacitive alternating-current voltage signal conversion circuit
CN104237616A (en) * 2014-09-22 2014-12-24 深圳市安邦信电子有限公司 Voltage and current zero crossing point detection circuit of motor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5166549A (en) * 1991-08-07 1992-11-24 General Electric Company Zero-voltage crossing detector for soft-switching devices
US5329171A (en) * 1991-06-25 1994-07-12 Mitsubishi Denki Kabushiki Kaisha Zero cross detection circuit
CN201113782Y (en) * 2007-10-26 2008-09-10 深圳和而泰智能控制股份有限公司 Zero-cross detection circuit for switch power circuit
CN201277999Y (en) * 2008-09-09 2009-07-22 海信(北京)电器有限公司 Positive and negative wave form detection circuit for electric grid and refrigerator with such circuit
CN201421475Y (en) * 2009-04-27 2010-03-10 海信(北京)电器有限公司 Circuit for reducing power consumption of zero-crossing detection circuit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5329171A (en) * 1991-06-25 1994-07-12 Mitsubishi Denki Kabushiki Kaisha Zero cross detection circuit
US5166549A (en) * 1991-08-07 1992-11-24 General Electric Company Zero-voltage crossing detector for soft-switching devices
CN201113782Y (en) * 2007-10-26 2008-09-10 深圳和而泰智能控制股份有限公司 Zero-cross detection circuit for switch power circuit
CN201277999Y (en) * 2008-09-09 2009-07-22 海信(北京)电器有限公司 Positive and negative wave form detection circuit for electric grid and refrigerator with such circuit
CN201421475Y (en) * 2009-04-27 2010-03-10 海信(北京)电器有限公司 Circuit for reducing power consumption of zero-crossing detection circuit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102879633A (en) * 2012-09-25 2013-01-16 上海微频莱机电科技有限公司 Safety protective structure of zero-crossing detection circuit
CN102890184A (en) * 2012-10-25 2013-01-23 德讯科技股份有限公司 Optocoupler-based zero passage detecting circuit
CN103683956A (en) * 2013-12-23 2014-03-26 上海贝岭股份有限公司 Low-power-consumption capacitive alternating-current voltage signal conversion circuit
CN104237616A (en) * 2014-09-22 2014-12-24 深圳市安邦信电子有限公司 Voltage and current zero crossing point detection circuit of motor
CN104237616B (en) * 2014-09-22 2017-11-17 深圳市安邦信电子有限公司 Electric moter voltage current zero-crossing point detects circuit

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Application publication date: 20120411