CN102890183A - Method and device for automatic voltage correction of zero crossing detection circuit - Google Patents

Method and device for automatic voltage correction of zero crossing detection circuit Download PDF

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Publication number
CN102890183A
CN102890183A CN2012104073430A CN201210407343A CN102890183A CN 102890183 A CN102890183 A CN 102890183A CN 2012104073430 A CN2012104073430 A CN 2012104073430A CN 201210407343 A CN201210407343 A CN 201210407343A CN 102890183 A CN102890183 A CN 102890183A
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China
Prior art keywords
voltage
zero
detection circuit
zero crossing
correction
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CN2012104073430A
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Chinese (zh)
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CN102890183B (en
Inventor
楚耀国
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四川长虹空调有限公司
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Priority to CN201210407343.0A priority Critical patent/CN102890183B/en
Publication of CN102890183A publication Critical patent/CN102890183A/en
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Publication of CN102890183B publication Critical patent/CN102890183B/en

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Abstract

The invention relates to an electronic circuit and an automation control technology and particularly relates to a method and a device for automatic voltage correction of a zero crossing detection circuit. The method provided by the invention mainly comprises the following steps of: performing voltage detection while performing voltage zero crossing detection, obtaining the deviation value of a voltage zero crossing point by comparing the detected voltage value with the rated voltage, and performing real-time dynamic compensation correction on the zero crossing point detected by means of the deviation value. The device provided by the invention mainly comprises a voltage detection circuit, a zero crossing detection circuit and a microprocessor; and the voltage detection circuit and the zero crossing detection circuit are connected to the microprocessor, respectively. The method and the device provided by the invention are capable of performing smart correction on the zero crossing signal in real time to achieve dynamic compensation and correction on the voltage zero crossing signal; therefore, the accuracy of the zero crossing control signal is effectively improved. The method and the device provided by the invention are especially suitable for the zero crossing detection circuit.

Description

Zero cross detection circuit carries out method and the device of voltage correction automatically

Technical field

The present invention relates to electronic circuit and automated control technology, relate to concretely method and device that a kind of zero cross detection circuit carries out voltage correction automatically.

Background technology

The effect of zero passage detection can be understood as a standard to master chip is provided, and the starting point of this standard is no-voltage, and the size of thyristor operating angle is exactly according to this standard.That is to say all corresponding conduction angle of high, medium and low, the little rotating speed of plastic packaging motor, and the ON time of each conduction angle begins to calculate from no-voltage, ON time is different, and the size of angle of flow is just different, so the rotating speed of motor is just different.

At present both at home and abroad when voltage zero-cross detects, when adopting voltage to drop to certain voltage value, be defaulted as 0, the voltage over zero of thinking namely that Here it is, all do not consider change in voltage to the impact of voltage over zero, zero crossing all is in the situation that rated voltage is given a fixing compensation, and is perhaps at all just uncompensated, all can not automatically carry out the zero crossing offset correction, there is larger error in the voltage over zero that externally detects during change in voltage with actual voltage over zero.

Summary of the invention

Technical matters to be solved by this invention is exactly to detect the problem that has larger error for present voltage zero-cross, provides a kind of zero cross detection circuit automatically to carry out method and the device of voltage correction.

The present invention solves the problems of the technologies described above the technical scheme that adopts: zero cross detection circuit carries out the method for voltage correction automatically, it is characterized in that, may further comprise the steps:

A. carrying out carrying out voltage detecting when voltage zero-cross detects;

B. according to the magnitude of voltage that detects by relatively drawing the off-set value of voltage over zero with rated voltage;

C. utilizing off-set value that the zero crossing that detects is carried out real-time dynamic compensation proofreaies and correct.

Concrete, the concrete grammar that the zero crossing that detects is carried out real-time dynamic compensation correction is:

Suppose that T is that output time, the t of zero cross signal after overcorrect is that zero cross signal time, the d that detects is permanent circuit compensating parameter, U InspectionBe real-time voltage, the U that detects MarkBe fixed standard voltage, then have:

T=t+d*(2-U Inspection/ U Mark).

Be used for the device that zero cross detection circuit carries out the method for voltage correction automatically, comprise voltage detecting circuit, zero cross detection circuit and microprocessor, described voltage detecting circuit is connected with microprocessor with zero cross detection circuit and is connected.

Concrete, described microprocessor is single-chip microcomputer.

Beneficial effect of the present invention is, can carry out intelligence to zero cross signal in real time and proofread and correct, and reaches the voltage zero-crossing signal dynamic compensation is proofreaied and correct, thereby effectively improve the degree of accuracy of zero passage control signal.

Description of drawings

Fig. 1 is the logic diagram that zero cross detection circuit of the present invention carries out the device of voltage correction automatically.

Embodiment

Describe technical scheme of the present invention in detail below in conjunction with accompanying drawing:

Zero cross detection circuit of the present invention carries out the method for voltage correction automatically, key step is: at first carrying out carrying out voltage detecting when voltage zero-cross detects, this step increases by one road voltage detecting circuit in traditional zero cross detection circuit, for detection of current magnitude of voltage; Then according to the magnitude of voltage that detects by relatively drawing the off-set value of voltage over zero with rated voltage, realize that this step can be by realizing for processor, as calculate the effective value of external voltage by the magnitude of voltage that detects by MCU, then compare the skew that calculates voltage over zero with rated voltage; Utilizing at last off-set value that the zero crossing that detects is carried out real-time dynamic compensation proofreaies and correct.The technical scheme that the present invention is total, be mainly and when carrying out zero passage detection, detect in real time current external voltage, then basis is passed through at this moment the effectively comparison of external voltage and rated voltage, thereby draws the off-set value of voltage over zero, realizes the real-time dynamic compensation to zero cross detection circuit.

The concrete grammar that a kind of concrete zero crossing to detecting carries out real-time dynamic compensation correction is:

Suppose that T is that output time, the t of zero cross signal after overcorrect is that zero cross signal time, the d that detects is permanent circuit compensating parameter, U InspectionBe real-time voltage, the U that detects MarkBe fixed standard voltage, then have:

T=t+d*(2-U Inspection/ U Mark).

Be used for the device that zero cross detection circuit carries out the method for voltage correction automatically, comprise voltage detecting circuit, zero cross detection circuit and microprocessor, described voltage detecting circuit is connected with microprocessor with zero cross detection circuit and is connected.

Concrete, described microprocessor is single-chip microcomputer.Single-chip microcomputer is as microprocessor commonly used, and its application technology is very ripe, can satisfy the demand of scheme shown in the present.

As shown in Figure 1, automatically carry out the logic diagram of the device of voltage correction for a kind of concrete zero cross detection circuit, wherein, voltage detecting circuit and zero cross detection circuit are connected to the pin of MCU respectively, and are connected with external power source by rectifier circuit.The principle of work of this circuit is: after MCU powers on, MCU detects the magnitude of voltage of input, calculate the effective value of external voltage, compare with rated voltage, wherein load voltage value is stored in the storage unit of MCU, and then MCU calculates the skew of voltage over zero, the zero crossing of zero cross detection circuit is carried out real-time dynamic compensation proofread and correct, obtain accurately zero cross signal, the zero passage control signal that at last output is proofreaied and correct through intelligence.

Claims (4)

1. zero cross detection circuit carries out the method for voltage correction automatically, it is characterized in that, may further comprise the steps:
A. carrying out carrying out voltage detecting when voltage zero-cross detects;
B. according to the magnitude of voltage that detects by relatively drawing the off-set value of voltage over zero with rated voltage;
C. utilizing off-set value that the zero crossing that detects is carried out real-time dynamic compensation proofreaies and correct.
2. zero cross detection circuit according to claim 1 carries out the method for voltage correction automatically, it is characterized in that, the concrete grammar that the zero crossing that detects is carried out real-time dynamic compensation correction is:
Suppose that T is that output time, the t of zero cross signal after overcorrect is that zero cross signal time, the d that detects is permanent circuit compensating parameter, U InspectionBe real-time voltage, the U that detects MarkBe fixed standard voltage, then have:
T=t+d*(2-U Inspection/ U Mark).
3. the device that automatically carries out the method for voltage correction for zero cross detection circuit according to claim 1, it is characterized in that, comprise voltage detecting circuit, zero cross detection circuit and microprocessor, described voltage detecting circuit is connected with microprocessor with zero cross detection circuit and is connected.
4. the device that automatically carries out the method for voltage correction for zero cross detection circuit according to claim 3 is characterized in that, described microprocessor is single-chip microcomputer.
CN201210407343.0A 2012-10-23 2012-10-23 Method and device for automatic voltage correction of zero crossing detection circuit CN102890183B (en)

Priority Applications (1)

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CN201210407343.0A CN102890183B (en) 2012-10-23 2012-10-23 Method and device for automatic voltage correction of zero crossing detection circuit

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CN201210407343.0A CN102890183B (en) 2012-10-23 2012-10-23 Method and device for automatic voltage correction of zero crossing detection circuit

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CN102890183B CN102890183B (en) 2015-02-04

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103389401A (en) * 2013-07-15 2013-11-13 汕头市超声仪器研究所有限公司 Power grid voltage detection device
CN107561349A (en) * 2017-08-18 2018-01-09 九阳股份有限公司 The zero passage detection and voltage sampling method and circuit of electromagnetic heater
CN108241084A (en) * 2016-12-26 2018-07-03 佛山市顺德区美的电热电器制造有限公司 Electric cooking pot and its zero passage calibration circuit and zero passage calibration method
CN108241085A (en) * 2016-12-26 2018-07-03 佛山市顺德区美的电热电器制造有限公司 Electric cooking pot and its zero passage calibration circuit and zero passage calibration method
CN108241085B (en) * 2016-12-26 2020-06-30 佛山市顺德区美的电热电器制造有限公司 Electric cooker, zero-crossing calibration circuit thereof and zero-crossing calibration method thereof

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CN102095986A (en) * 2009-12-15 2011-06-15 西安爱邦电气有限公司 Automatic analysis device for realizing bus differential protection CT (Current Transformer) wiring checking
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CN1553209A (en) * 2003-05-29 2004-12-08 中国科学院光电技术研究所 Plane constant speed transmission, integrated driving generator testing system
US20070188105A1 (en) * 2003-09-22 2007-08-16 Peter Lurkens Method of determining a zero point of a current sensor
WO2006037243A1 (en) * 2004-10-08 2006-04-13 Abb Research Ltd Method for determining zero crossing in a converter
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103389401A (en) * 2013-07-15 2013-11-13 汕头市超声仪器研究所有限公司 Power grid voltage detection device
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CN108241084A (en) * 2016-12-26 2018-07-03 佛山市顺德区美的电热电器制造有限公司 Electric cooking pot and its zero passage calibration circuit and zero passage calibration method
CN108241085A (en) * 2016-12-26 2018-07-03 佛山市顺德区美的电热电器制造有限公司 Electric cooking pot and its zero passage calibration circuit and zero passage calibration method
CN108241085B (en) * 2016-12-26 2020-06-30 佛山市顺德区美的电热电器制造有限公司 Electric cooker, zero-crossing calibration circuit thereof and zero-crossing calibration method thereof
CN108241084B (en) * 2016-12-26 2020-06-30 佛山市顺德区美的电热电器制造有限公司 Electric cooker, zero-crossing calibration circuit thereof and zero-crossing calibration method thereof
CN107561349A (en) * 2017-08-18 2018-01-09 九阳股份有限公司 The zero passage detection and voltage sampling method and circuit of electromagnetic heater

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