CN108962679A - A kind of electromagnetic switch high frequency keeps noise device for self-correcting control and method - Google Patents
A kind of electromagnetic switch high frequency keeps noise device for self-correcting control and method Download PDFInfo
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- CN108962679A CN108962679A CN201810734971.7A CN201810734971A CN108962679A CN 108962679 A CN108962679 A CN 108962679A CN 201810734971 A CN201810734971 A CN 201810734971A CN 108962679 A CN108962679 A CN 108962679A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
- H01H47/32—Energising current supplied by semiconductor device
- H01H47/325—Energising current supplied by semiconductor device by switching regulator
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/064—Circuit arrangements for actuating electromagnets
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- Power Engineering (AREA)
- Physics & Mathematics (AREA)
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Abstract
The present invention provides the device for self-correcting control and method of a kind of electromagnetic switch high frequency holding noise, becomes more stable DC voltage after the rectified filter circuit of alternating current-direct current input power of the device, and be applied to IN+ the and IN- node of electromagnetic mechanism driving circuit；Control circuit of chopping driving power is exported from OUT+ and OUT- node, and is applied to the electromagnetic mechanism of switch；Embedded control system generates pwm signal according to the feedback signal of voltage sensor, current sensor, sound transducer, vibrating sensor, carries out closed-loop current control to electromagnetic mechanism driving circuit after isolated drive circuit.The present invention detects the sound and vibration signal when electromagnetic switch is reliably kept, electromagnetic switch magnet excitation frequency and current closed-loop pid control parameter are corrected according to the size of sound and vibration signal, the highest magnet excitation frequency that the noise of electromagnetic switch and vibration can be made to be preferably minimized is found, best Energy Saving Control effect is reached while reducing running noises.
Description
Technical field
The present invention relates to the automatic correction controling methods that a kind of electromagnetic switch high frequency keeps noise, to carry out electromagnetic switch high frequency
Noiseless holding under excitation.
Background technique
Electromagnetic switch is widely used in various industrial control systems and civil electric appliance, and performance indicator, which directly affects, is
The stability and reliability of system or electric appliance.Traditional AC electromagnetic switch excitation voltage is sinusoidal cycles function in the time domain, is led
The magnetic flux and electromagnetic attraction for causing its electromagnetic mechanism are also by sinusoidal rule cyclically-varying, when electromagnetic mechanism moves iron core suction less than bullet
When spring counter-force, iron core will generate vibration, issue noise.AC electromagnetic mechanism generallys use the measure of installation divided magnetic ring to reduce
Suction pulsation, makes the synthesis suction inside and outside divided magnetic ring be consistently greater than counter spring force, reduces the vibration between sound iron core, and reduction is made an uproar
Sound.But there are many defects for AC electromagnetic mechanism, and such as: operating voltage range is narrow, divided magnetic ring easy fracture, keep power consumption big, it is difficult to
Optimal control, etc..
The Closed loop Control of electromagnetic switch is quickly grown in recent years, and mainly there are several types of control program, 1, coil electricity
Flow Closed loop Control: coil excitation voltage is controlled using PWM, is feedback with coil current, is carried out closed-loop control, directly adjusts
The turn-on cycle number and duty ratio of coil high-frequency square-wave voltage, to obtain required coil current.2, position-sensor-free
It is displaced closed-loop control: further dynamic come real-time estimation contactor using offset estimation technology on the basis of closed-loop current control
Iron core displacement, constructs the displacement closed-loop control of position-sensor-free, coil activation voltage is similarly high frequency square wave.3, coil electricity
It presses Closed loop Control: using coil voltage average value as feedback, excitation voltage duty ratio, electromagnetism being adjusted with PWM mode
The excitation voltage of switch is similarly high frequency square wave.The performance that electromagnetic switch under intelligent control overcomes traditional electromagnetic switch lacks
It falls into, improves switch performance.
By the above intelligent control scheme it can be seen that with electromagnetic switch intelligent control technology development, excitation side
Formula is changed from traditional industrial frequency AC to high frequency square wave, during electromagnetic switch stablizes holding, due to the strong sense of electromagnetic mechanism
Property effect, the constant coil current of available dynamic under high frequency square wave voltage excitation.It is influenced by the stary capacity of coil,
The rising of square-wave voltage and decline edge can generate coil current spike；In addition under high-frequency work mode, coil current is moved
The constant principle of state can generate intrinsic current ripples, these all may cause the high-frequency noise of electromagnetic mechanism, make an uproar compared to power frequency
Sound, the frequency of these high-frequency noises is higher more ear-piercing, needs that certain control method is taken to be inhibited.
Summary of the invention
The audio-frequency noise problem that the present invention generates when keeping for electromagnetic switch high-frequency excitation, proposes a kind of inhibition noise
Automatic correction controling method.
To achieve the above object, the invention adopts the following technical scheme: a kind of electromagnetic switch high frequency keeps the self-correcting of noise
Positive control device comprising current rectifying and wave filtering circuit, electromagnetic mechanism driving circuit, electromagnetic mechanism, isolated drive circuit, voltage sensor
Device, current sensor, sound transducer, vibrating sensor and embedded system；The rectified filtering of alternating current-direct current input power
Become more stable DC voltage after circuit, and is applied to IN+ the and IN- node of electromagnetic mechanism driving circuit；The electromagnetic motor
Structure driving circuit includes a control circuit of chopping；Control circuit of chopping driving power is exported from OUT+ and OUT- node, and is applied
To the electromagnetic mechanism of switch；
DC voltage after the voltage sensor detection rectifying and wave-filtering；The current sensor detection electromagnetic mechanism coil electricity
Stream；The sound transducer is used to detect the audio-frequency noise of electromagnetic mechanism sending；The vibrating sensor is for detecting electromagnetic motor
The mechanical oscillation that structure generates；Embedded control system is according to voltage sensor, current sensor, sound transducer, vibrating sensing
The feedback signal of device generates pwm signal, carries out closed-loop current control to electromagnetic mechanism driving circuit after isolated drive circuit.
In an embodiment of the present invention, the control circuit of chopping includes electronic power switch S1, S4, fast recovery diodeD 2、D 3；Electronic power switch S1 collector connects IN+ node, fast recovery diode respectivelyD 2Cathode；Electronic power switch S1 base stage
Connect embedded control system output；Electric power anode connects electronic power switch S1 emitter respectively and connects fast recovery diode respectivelyD 3Yin
Pole, driving power OUT+ node；Fast recovery diodeD 3Anode connects electronic power switch S4 emitter respectively, electromagnetic mechanism drives
The IN- of dynamic circuit；Electronic power switch S4 collector connects fast recovery diode respectivelyD 2The OUT- node of anode, driving power；
Electronic power switch S4 base stage connects embedded control system output.
In an embodiment of the present invention, the embedded control system includes that PWM controller and difference are coupled
PID controller, switching frequency scan module, topological control module.
The present invention also provides the automatic correction controling methods that a kind of electromagnetic switch high frequency keeps noise comprising following steps:
When electromagnetic switch is reliably kept, current sensor detection coil electric current compares generation error amount with reference current is kept,
The error amount is sent into PID controller, for determining the duty ratio of pwm signal, carries out closed-loop control to coil current；Topology control
Molding block makes electromagnetic mechanism work in binary states topological structure in reliable keep: making electronic power switchS 4Driving is always high electricity
It is flat, set electronic power switchS 4To be normally opened, electronic power switchS 1Driving signal is obtained according to the control law of current closed-loop, when
Electronic power switchS 1When conducting, the forward voltage after rectifying and wave-filtering is applied to coil both ends, and coil current rapid increase works as electricity
Power electronic switchS 1When closing, coil current passes throughS 4、D 3Afterflow,S 4、D 3Negative sense tube voltage drop be applied to coil both ends, coil electricity
Stream slowly decline, with this come maintain dynamic it is constant；Driving circuit works in binary states topology during holding can be greatly reduced line
The switch spike of loop current, as the formula:
(1)
In formula:i peakFor switch spike electric current,C distFor the stary capacity of coil,u coilFor coil voltage；
Work as electronic power switchS 1When conductingu coilAmplitude is larger, causes voltage change ratio larger, and coil current spike is more bright
It is aobvious, work as electronic power switchS 1When closingu coilFor afterflow voltage, amplitude is smaller, and voltage change ratio is caused to become smaller, coil current point
Peak is smaller, and then reduces audio-frequency noise.
In an embodiment of the present invention, switching frequency scan module makes the frequency of PWM controller in a certain range from low
Change to high circulation, one frequency of every stepping, PID control system is according to the electromagnetic switch sound of feedback and the size of vibration signal
To adjust the setting parameter of PID controller, reduction coil current ripple；It successively scans, searching out keeps electromagnetic mechanism noise minimum
Highest switching frequency.
In an embodiment of the present invention, by changing the amplitude of alternating current-direct current input voltage, frequency is executed under different voltage
Rate scanning and pid parameter tuning process, to obtain under different input voltages, the optimal control parameter of silent running；It is corrected
Afterwards, current silent running control parameter is stored into embedded control system, removes sound and vibrating sensor, root later
The noiseless holding of electromagnetic switch is carried out according to the control parameter after the amplitude selection correction of input voltage.
With the prior art, the present invention is detected by sound transducer, vibrating sensor when electromagnetic switch is reliably kept
Sound and vibration signal correct electromagnetic switch magnet excitation frequency and current closed-loop PID control according to the size of sound and vibration signal
Parameter finds the highest magnet excitation frequency that the noise of electromagnetic switch and vibration can be made to be preferably minimized, and is reducing the same of running noises
When reach best Energy Saving Control effect.
Detailed description of the invention
Fig. 1 is control principle system schematic of the invention.
Specific embodiment
The present invention is done into an explanation with specific embodiment with reference to the accompanying drawings of the specification.
In an embodiment of the present invention, the control circuit of chopping includes electronic power switch S1, S4, fast recovery diodeD 2、D 3；Electronic power switch S1 collector connects IN+ node, fast recovery diode respectivelyD 2Cathode；Electronic power switch S1 base stage
Connect embedded control system output；Electric power anode connects electronic power switch S1 emitter respectively and connects fast recovery diode respectivelyD 3Yin
Pole, driving power OUT+ node；Fast recovery diodeD 3Anode connects electronic power switch S4 emitter respectively, electromagnetic mechanism drives
The IN- of dynamic circuit；Electronic power switch S4 collector connects fast recovery diode respectivelyD 2The OUT- node of anode, driving power；
Electronic power switch S4 base stage connects embedded control system output.
In an embodiment of the present invention, the embedded control system includes that PWM controller and difference are coupled
PID controller, switching frequency scan module, topological control module.
Electromagnetic switch keep noise self-correcting principle become after the rectified filtering of alternating current-direct current input power as shown in Figure 1: compared with
Stable DC voltage, IN+ the and IN- node being applied in electromagnetic mechanism driving circuit；In electromagnetic mechanism driving circuitS 1、S 4
For electronic power switch；D 2、D 3For fast recovery diode, control circuit of chopping is collectively constituted, driving power is saved from OUT+ and OUT-
Point output, and it is applied to the electromagnetic mechanism of switch；Voltage sensor is for detecting the DC voltage after rectifying and wave-filtering, current sense
Device is used to detect the audio-frequency noise of electromagnetic mechanism sending, vibrating sensing for detecting electromagnetic mechanism coil current, sound transducer
Device is used to detect the mechanical oscillation of electromagnetic mechanism generation；Embedded control system is generated according to the feedback signal of various sensors
Pwm signal acts on electromagnetic mechanism driving circuit after isolation drive, completes the closed-loop control of electromagnetic mechanism coil current.
The present invention also provides the automatic correction controling methods that a kind of electromagnetic switch high frequency keeps noise comprising following steps:
When electromagnetic switch is reliably kept, current sensor detection coil electric current compares generation error amount with reference current is kept,
The error amount is sent into PID controller, for determining the duty ratio of pwm signal, carries out closed-loop control to coil current；Topology control
Molding block makes electromagnetic mechanism work in binary states topological structure in reliable keep: making electronic power switchS 4Driving is always high electricity
It is flat, set electronic power switchS 4To be normally opened, electronic power switchS 1Driving signal is obtained according to the control law of current closed-loop, when
Electronic power switchS 1When conducting, the forward voltage after rectifying and wave-filtering is applied to coil both ends, and coil current rapid increase works as electricity
Power electronic switchS 1When closing, coil current passes throughS 4、D 3Afterflow,S 4、D 3Negative sense tube voltage drop (3V or so) be applied to coil two
End, coil current slowly declines, and maintains the dynamic constant with this；Driving circuit works in binary states topology during holding can be big
Width reduces the switch spike of coil current, as the formula:
(1)
In formula:i peakFor switch spike electric current,C distFor the stary capacity of coil,u coilFor coil voltage；
Work as electronic power switchS 1When conductingu coilAmplitude is larger, causes voltage change ratio larger, and coil current spike is more bright
It is aobvious, work as electronic power switchS 1When closingu coilFor afterflow voltage, amplitude is smaller, and voltage change ratio is caused to become smaller, coil current point
Peak is smaller, and then reduces audio-frequency noise.
In an embodiment of the present invention, switching frequency scan module makes the frequency of PWM controller in a certain range from low
Change to high circulation, one frequency of every stepping, PID control system is according to the electromagnetic switch sound of feedback and the size of vibration signal
To adjust the setting parameter of PID controller, reduction coil current ripple；It successively scans, searching out keeps electromagnetic mechanism noise minimum
Highest switching frequency, balance is obtained between energy-saving run and silent running.
In an embodiment of the present invention, it by changing the amplitude of alternating current-direct current input voltage, is executed under several groups of exemplary voltages
Above-mentioned frequency scanning and pid parameter tuning process, to obtain under different input voltages, the optimal control parameter of silent running；
After corrected, current silent running control parameter is stored into embedded control system, removes sound and vibration later
Sensor carries out the noiseless holding of electromagnetic switch according to the control parameter after the selection correction of the amplitude of input voltage.
The above are preferred embodiments of the present invention, all any changes made according to the technical solution of the present invention, and generated function is made
When with range without departing from technical solution of the present invention, all belong to the scope of protection of the present invention.
Claims (6)
1. the device for self-correcting control that a kind of electromagnetic switch high frequency keeps noise, it is characterised in that: including current rectifying and wave filtering circuit, electricity
Magnetic mechanism driving circuit, electromagnetic mechanism, isolated drive circuit, voltage sensor, current sensor, sound transducer, vibration pass
Sensor and embedded system；
Become more stable DC voltage after the rectified filter circuit of alternating current-direct current input power, and is applied to electromagnetic mechanism drive
IN+ the and IN- node of dynamic circuit；
The electromagnetic mechanism driving circuit includes a control circuit of chopping；Control circuit of chopping driving power is saved from OUT+ and OUT-
Point output, and it is applied to the electromagnetic mechanism of switch；
DC voltage after the voltage sensor detection rectifying and wave-filtering；The current sensor detection electromagnetic mechanism coil electricity
Stream；The sound transducer is used to detect the audio-frequency noise of electromagnetic mechanism sending；The vibrating sensor is for detecting electromagnetic motor
The mechanical oscillation that structure generates；
Embedded control system is produced according to the feedback signal of voltage sensor, current sensor, sound transducer, vibrating sensor
Raw pwm signal, carries out closed-loop current control to electromagnetic mechanism driving circuit after isolated drive circuit.
2. the device for self-correcting control that electromagnetic switch high frequency according to claim 1 keeps noise, it is characterised in that: described
Control circuit of chopping includes electronic power switch S1, S4, fast recovery diodeD 2、D 3；Electronic power switch S1 collector connects respectively
IN+ node, fast recovery diodeD 2Cathode；Electronic power switch S1 base stage connects embedded control system output；Electric power anode point
Electronic power switch S1 emitter is not connect connects fast recovery diode respectivelyD 3The OUT+ node of cathode, driving power；It is fast to restore two
Pole pipeD 3Anode meets the IN- of electronic power switch S4 emitter, electromagnetic mechanism driving circuit respectively；Electronic power switch S4 current collection
Pole connects fast recovery diode respectivelyD 2The OUT- node of anode, driving power；Electronic power switch S4 base stage connects embedded control
System output processed.
3. the device for self-correcting control that electromagnetic switch high frequency according to claim 1 keeps noise, it is characterised in that: described
Embedded control system includes PWM controller and PID controller coupled respectively, switching frequency scan module, topology
Control module.
4. the automatic correction controling method that a kind of electromagnetic switch high frequency keeps noise, it is characterised in that: the following steps are included: working as electromagnetism
When switch is reliably kept, current sensor detection coil electric current compares generation error amount with reference current is kept, the error
Value is sent into PID controller, for determining the duty ratio of pwm signal, carries out closed-loop control to coil current；
Topological control module makes electromagnetic mechanism work in binary states topological structure in reliable keep: making electronic power switchS 4Driving
It is always high level, sets electronic power switchS 4To be normally opened, electronic power switchS 1Driving signal is advised according to the control of current closed-loop
Rule obtains, and works as electronic power switchS 1When conducting, the forward voltage after rectifying and wave-filtering is applied to coil both ends, and coil current is quick
Rise, works as electronic power switchS 1When closing, coil current passes throughS 4、D 3Afterflow,S 4、D 3Negative sense tube voltage drop be applied to coil two
End, coil current slowly declines, and maintains the dynamic constant with this；When to work in binary states topology during holding low for driving circuit
The switch spike of coil current, as the formula:
(1)
In formula:i peakFor switch spike electric current,C distFor the stary capacity of coil,u coilFor coil voltage；
Work as electronic power switchS 1When conductingu coilAmplitude is larger, causes voltage change ratio larger, and coil current spike is more bright
It is aobvious, work as electronic power switchS 1When closingu coilFor afterflow voltage, amplitude is smaller, and voltage change ratio is caused to become smaller, coil current point
Peak is smaller, and then reduces audio-frequency noise.
5. the automatic correction controling method of the holding noise of the electromagnetic switch high frequency according to shown in claim 4, it is characterised in that: switch
Frequency scanning module makes the frequency of PWM controller circulation change from low to high in a certain range, one frequency of every stepping, PID
Control system adjusts the setting parameter of PID controller according to the size of the electromagnetic switch sound of feedback and vibration signal, reduces
Coil current ripple；It successively scans, searches out the highest switching frequency for keeping electromagnetic mechanism noise minimum.
6. the automatic correction controling method of the holding noise of the electromagnetic switch high frequency according to shown in claim 5, it is characterised in that: pass through
The amplitude for changing alternating current-direct current input voltage executes frequency scanning and pid parameter tuning process, under different voltage to obtain not
With under input voltage, the optimal control parameter of silent running；After corrected, current silent running control parameter storage is arrived
In embedded control system, remove sound and vibrating sensor later, according to the control after the selection correction of the amplitude of input voltage
Parameter carries out the noiseless holding of electromagnetic switch.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810734971.7A CN108962679B (en) | 2018-07-06 | 2018-07-06 | Electromagnetic switch high-frequency holding noise self-correction control device and method |
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| CN201810734971.7A CN108962679B (en) | 2018-07-06 | 2018-07-06 | Electromagnetic switch high-frequency holding noise self-correction control device and method |
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| CN108962679A true CN108962679A (en) | 2018-12-07 |
| CN108962679B CN108962679B (en) | 2020-05-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110853980A (en) * | 2019-12-05 | 2020-02-28 | 福州大学 | Self-adaptive suppression method for high-frequency holding noise of electromagnetic switch |
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| US7898788B2 (en) * | 2006-05-15 | 2011-03-01 | Schneider Electric Industries Sas | Electronic control device for electromagnetic unit |
| CN103456566A (en) * | 2013-08-21 | 2013-12-18 | 福州大学 | Intelligent alternating current contactor capable of being controlled digitally and dynamically in whole process |
| CN105914100A (en) * | 2016-07-12 | 2016-08-31 | 福州大学 | Dynamic reliable control strategy of high-capacity contactor |
| CN205673159U (en) * | 2016-06-21 | 2016-11-09 | 唐山职业技术学院 | A kind of energy-saving and cost-reducing electromagnetic oscillation device |
| CN206135756U (en) * | 2016-10-24 | 2017-04-26 | 北京灵铱科技有限公司 | Low noise step actuator |
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2018
- 2018-07-06 CN CN201810734971.7A patent/CN108962679B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7898788B2 (en) * | 2006-05-15 | 2011-03-01 | Schneider Electric Industries Sas | Electronic control device for electromagnetic unit |
| CN103456566A (en) * | 2013-08-21 | 2013-12-18 | 福州大学 | Intelligent alternating current contactor capable of being controlled digitally and dynamically in whole process |
| CN205673159U (en) * | 2016-06-21 | 2016-11-09 | 唐山职业技术学院 | A kind of energy-saving and cost-reducing electromagnetic oscillation device |
| CN105914100A (en) * | 2016-07-12 | 2016-08-31 | 福州大学 | Dynamic reliable control strategy of high-capacity contactor |
| CN206135756U (en) * | 2016-10-24 | 2017-04-26 | 北京灵铱科技有限公司 | Low noise step actuator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110853980A (en) * | 2019-12-05 | 2020-02-28 | 福州大学 | Self-adaptive suppression method for high-frequency holding noise of electromagnetic switch |
| CN110853980B (en) * | 2019-12-05 | 2021-05-18 | 福州大学 | Self-adaptive suppression method for high-frequency holding noise of electromagnetic switch |
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| CN108962679B (en) | 2020-05-08 |
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