CN102890183B - 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 PDFInfo
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- CN102890183B CN102890183B CN201210407343.0A CN201210407343A CN102890183B CN 102890183 B CN102890183 B CN 102890183B CN 201210407343 A CN201210407343 A CN 201210407343A CN 102890183 B CN102890183 B CN 102890183B
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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
Technical field
The present invention relates to electronic circuit and automated control technology, relate to method and device that a kind of zero cross detection circuit carries out voltage correction automatically concretely.
Background technology
The effect of zero passage detection can be understood as and provides a standard to master chip, 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 all corresponding conduction angle of high, medium and low, the micro-rotating speed of plastic packaging motor, and the ON time of each conduction angle calculates from no-voltage, ON time is different, and the size of angle of flow is just different, and therefore the rotating speed of motor is just different.
Domestic and international when voltage zero-cross detects at present, when adopting voltage to drop to certain voltage value, be defaulted as 0, namely voltage over zero of thinking that Here it is, all do not consider the impact of change in voltage on voltage over zero, zero crossing is all the compensation fixing to when rated voltage, or basic just uncompensated, all automatically can not carry out zero crossing offset correction, there is larger error with actual voltage over zero in the voltage over zero detected when outside change in voltage.
Summary of the invention
Technical matters to be solved by this invention, is exactly detect for current voltage zero-cross the problem existed compared with big error, 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 adopted technical scheme: zero cross detection circuit carries out the method for voltage correction automatically, it is characterized in that, comprises the following steps:
A. while carrying out voltage zero-cross detection, voltage detecting is carried out;
B. according to the magnitude of voltage that detects by comparing with rated voltage the off-set value drawing voltage over zero;
C. off-set value is utilized to carry out real-time dynamic compensation correction to the zero crossing detected.
Concrete, the concrete grammar zero crossing detected being carried out to real-time dynamic compensation correction is:
Suppose that T is the output time of zero cross signal after overcorrect, t be the zero cross signal time, the d that detect is permanent circuit compensating parameter, U
inspectionfor the real-time voltage, the U that detect
markfor fixed standard voltage, then have:
T=t+d*(2-U
inspection/ U
mark).
Automatically carry out the device of the method for voltage correction for zero cross detection circuit, comprise voltage detecting circuit, zero cross detection circuit and microprocessor, described voltage detecting circuit is connected with microprocessor respectively with zero cross detection circuit.
Concrete, described microprocessor is single-chip microcomputer.
Beneficial effect of the present invention is, can carry out intelligence in real time and correct, reach and correct voltage zero-crossing signal dynamic compensation zero cross signal, thus the effective degree of accuracy improving Super-zero control signal.
Accompanying drawing explanation
Fig. 1 is the logic diagram that zero cross detection circuit of the present invention carries out the device of voltage correction automatically.
Embodiment
Technical scheme of the present invention is described 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: first while carrying out voltage zero-cross detection, carry out voltage detecting, this step increases by a road voltage detecting circuit in traditional zero cross detection circuit, for detecting current magnitude of voltage; Then according to the magnitude of voltage that detects by comparing with rated voltage the off-set value drawing voltage over zero, realize this step by realizing for processor, as calculated the effective value of external voltage by the magnitude of voltage detected by MCU, then compare the skew calculating voltage over zero with rated voltage; Off-set value is finally utilized to carry out real-time dynamic compensation correction to the zero crossing detected.The technical scheme that the present invention is total, be mainly and detect current external voltage in real time while carrying out zero passage detection, then according to the comparison passing through now effective external voltage and rated voltage, thus draw the off-set value of voltage over zero, realize the real-time dynamic compensation to zero cross detection circuit.
A kind of specifically to the concrete grammar that the zero crossing detected carries out real-time dynamic compensation correction be:
Suppose that T is the output time of zero cross signal after overcorrect, t be the zero cross signal time, the d that detect is permanent circuit compensating parameter, U
inspectionfor the real-time voltage, the U that detect
markfor fixed standard voltage, then have:
T=t+d*(2-U
inspection/ U
mark).
Automatically carry out the device of the method for voltage correction for zero cross detection circuit, comprise voltage detecting circuit, zero cross detection circuit and microprocessor, described voltage detecting circuit is connected with microprocessor respectively with zero cross detection circuit.
Concrete, described microprocessor is single-chip microcomputer.Single-chip microcomputer is as conventional microprocessor, and its application technology is very ripe, can meet the demand of illustrated scheme.
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, the magnitude of voltage of MCU to input detects, 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, carries out real-time dynamic compensation correction to the zero crossing of zero cross detection circuit, obtain zero cross signal accurately, finally export the Super-zero control signal corrected through intelligence.
Claims (3)
1. zero cross detection circuit carries out the method for voltage correction automatically, it is characterized in that, comprises the following steps:
A. while carrying out voltage zero-cross detection, voltage detecting is carried out;
B. according to the magnitude of voltage that detects by comparing with rated voltage the off-set value drawing voltage over zero;
C. utilize off-set value to carry out real-time dynamic compensation correction to the zero crossing detected, wherein, suppose that T is the output time of zero cross signal after overcorrect, t be the zero cross signal time, the d that detect is permanent circuit compensating parameter, U
inspectionfor the real-time voltage, the U that detect
markfor fixed standard voltage, then have: T=t+d* (2-U
inspection/ U
mark).
2. the device automatically carrying 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 respectively with zero cross detection circuit;
Described microprocessor is used for the effective value being calculated external voltage by the magnitude of voltage detected, the effective value of external voltage and rated voltage are compared the skew obtaining voltage over zero, and real-time dynamic compensation rectification is carried out to the zero crossing of zero cross detection circuit, wherein, suppose that T is the output time of zero cross signal after overcorrect, t be the zero cross signal time, the d that detect is permanent circuit compensating parameter, U
inspectionfor the real-time voltage, the U that detect
markfor fixed standard voltage, then have: T=t+d* (2-U
inspection/ U
mark).
3. the device automatically carrying out the method for voltage correction for zero cross detection circuit according to claim 2, is characterized in that, described microprocessor is single-chip microcomputer.
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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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| CN102890183A CN102890183A (en) | 2013-01-23 |
| CN102890183B true CN102890183B (en) | 2015-02-04 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389401B (en) * | 2013-07-15 | 2015-11-25 | 汕头市超声仪器研究所有限公司 | A kind of electric network voltage detection device |
| 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 |
| CN109661054B (en) * | 2017-10-11 | 2021-04-20 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating equipment, electromagnetic heating system and heating control device and method thereof |
| CN114309351A (en) * | 2021-11-23 | 2022-04-12 | 醴陵市辉泰电子有限公司 | Pin foot distance four-side stamping correction device |
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| CN100403045C (en) * | 2003-05-29 | 2008-07-16 | 中国科学院光电技术研究所 | Detection system for detecting airplane constant-speed transmission device and integrated driving generator |
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| DE102006017479A1 (en) * | 2006-04-13 | 2007-10-18 | Siemens Ag Österreich | Method for measuring an alternating current generated by an inverter and arrangement for carrying out the method |
| CN101303376B (en) * | 2008-05-26 | 2011-06-15 | 深圳和而泰智能控制股份有限公司 | Method and apparatus for compensating voltage zero-cross detection |
| CN101927785B (en) * | 2009-06-26 | 2012-08-08 | 上海联盛汽车电子有限公司 | Electric power-assisted steering system with PMSM current sensor error self-correcting function |
| 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 |
| CN102243263B (en) * | 2011-04-08 | 2015-05-13 | 苏州路之遥科技股份有限公司 | Alternating current value detection and current zero crossing point detection circuit |
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| WO2006037243A1 (en) * | 2004-10-08 | 2006-04-13 | Abb Research Ltd | Method for determining zero crossing in a converter |
| CN1880934A (en) * | 2005-06-14 | 2006-12-20 | 探微科技股份有限公司 | Method for correcting zero offset voltage of pressure transducer |
| CN101173976A (en) * | 2006-10-31 | 2008-05-07 | 海尔集团公司 | Fault detection method of zero-cross triggering circuit |
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