CN106208339B - A kind of compensation motor anti-swing electrical system - Google Patents
A kind of compensation motor anti-swing electrical system Download PDFInfo
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- CN106208339B CN106208339B CN201610574576.8A CN201610574576A CN106208339B CN 106208339 B CN106208339 B CN 106208339B CN 201610574576 A CN201610574576 A CN 201610574576A CN 106208339 B CN106208339 B CN 106208339B
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- power supply
- electric installation
- phase power
- compensation
- contactor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/005—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting using a power saving mode
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Abstract
The invention discloses a kind of compensation motor anti-swing electrical system, including power grid U phase power supply, V phase power supply and W phase power supply, U phase power supply and V phase power supply pass through electrothermal relay FR and the normally opened main contact KM1 access motor M of contactor, W phase power supply connects control circuit, control circuit includes that the normally opened auxiliary contact KM2 of contactor is parallel on the normally closed auxiliary contact FR1 of anti-shake electric installation, electrothermal relay, stop button SB2, start button SB1 and the contactor coil KM, start button SB1 being serially connected.The present invention, when system power grid occurs shaking electricity, provides circuit for controlling motor normal operating voltage by accessing anti-shake electric installation in circuit for controlling motor, guarantees that motor works normally, avoids biggish economic loss；Anti-shake electric installation carries out voltage compensation in under-voltage, reduces running wastage, while not needing to switch, and reduces accident potential caused by power supply switching problem.
Description
Technical field
The invention belongs to electroporation fields, are related to a kind of anti-swing electrical system, specifically a kind of compensation anti-shake electricity of motor
System.
Background technique
With the development of society, demand of the people to electric power is more and more obvious, some industrial occasions get over the dependence of electric power
Carry out bigger, industrial process equipment, when generation short trouble, induction machine starting, lightning stroke, switch operation, change in electrical power trans mission/distribution system
When the events such as frequency device and the switching of capacitance group, it can cause voltage dip.Wherein, short trouble, induction machine starting and thunder
Hit is the main reason for causing voltage dip.Insulator arc-over caused by when lightning stroke or over the ground electric discharge can be such that protective device acts,
It is temporarily dropped so as to cause supply voltage.This temporary drop coverage is big, and the duration is generally more than 100ms.Motor direct-on-line starting
When, need the current value drawn from power supply be at full capacity when 500%~800%, when this high current flows through system impedance, will
Voltage can be caused to decline suddenly.Short trouble may cause system Remote feeding voltage is more serious to fall, and influence industry
To the normal work of the electrical equipment of voltage-sensitive in production process, or even cause serious economic loss.
The direct starting and stopping control of motor, principle is as shown in Figure 1, cardinal principle is electric network source U, V, W normal by contactor
Main contact KM1, electrothermal relay FR access motor M are opened, W phase is the input power of control circuit, when start button SB1 is pressed, W phase
Power supply is through the normally closed auxiliary contact FR1 of electrothermal relay, stop button SB2, start button SB1 to contactor coil KM, contactor line
It encloses KM to be powered, is attracted the normally opened main contact KM1 of contactor and contactor normally opened auxiliary contact KM2, motor M operation.Work as stop button
SB2 is pressed, contactor coil KM power loss, and the normally opened main contact KM1 of contactor and the normally opened auxiliary contact KM2 of contactor are disconnected, motor M
It is out of service.
The operating voltage of contactor coil KM is AC180V-AC250V, in motor operation course, when occurring to shake electricity, and electricity
Net voltage drops to AC180V rapidly hereinafter, contactor coil KM is less than the elastic force of release spring without inhaling because of the suction to iron core
It closes, the normally opened main contact KM1 of contactor and the normally opened auxiliary contact KM2 of contactor are disconnected, and motor M is out of service.
Power grid shakes electricity and causes motor stopping, especially some crucial motor stoppings, and the influence to production is particularly acute.Every time by
Shake electricity in power grid, non-programmed halt caused by crucial motor low-voltage tripping can all cause very huge economic loss to enterprise, it is few then
Hundreds of thousands, it is how then millions of.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of compensation motor anti-swing electrical system, go out in system power grid
When revealing existing rolling electricity, electric machine control system normal operating voltage is provided, avoids biggish economic loss.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of compensation motor anti-swing electrical system, including power grid U phase power supply, V phase power supply and W phase power supply, U phase power supply and V
Phase power supply accesses motor M by electrothermal relay FR and the normally opened main contact KM1 of contactor, and W phase power supply connects control circuit, control electricity
Road includes the normally closed auxiliary contact FR1 of electrothermal relay, stop button SB2, start button SB1 and the contactor coil being serially connected
The normally opened auxiliary contact KM2 of contactor is parallel on KM, start button SB1, the control circuit further includes anti-shake electric installation, institute
The anti-shake electric installation stated is connected in control circuit, and the W phase power supply connects the input terminal of anti-shake electric installation, the anti-shake electricity
The output end of device connects the normally closed auxiliary contact FR1 of electrothermal relay.
Further, the anti-shake electric installation include isolating transformer T1, rectifier bridge ZL, filter capacitor C2, compensation it is inverse
Become device NB, filter inductance L1, filter capacitor C1, compensator transformer T2, control panel KZ and alternating current voltage sampling device U1；
The input terminal of the anti-shake electric installation connects isolating transformer T1, the isolating transformer T1 connection rectifier bridge
ZL, rectifier bridge ZL connection the filter capacitor C2, the filter capacitor C2 connection control panel KZ and compensation inverter NB, institute
The control panel KZ connection compensation inverter NB and alternating current voltage sampling device U1 stated, the compensation inverter NB connection filter inductance
L1, the described filter inductance L I connection filter capacitor C1, the filter capacitor C1 connection compensator transformer T2, the benefit
It repays transformer T2 and alternating current voltage sampling device U1 is all connected with the output end of anti-shake electric installation.
Beneficial effects of the present invention: the present invention in circuit for controlling motor by accessing anti-shake electric installation, anti-shake electric installation
Include isolating transformer T1, rectifier bridge ZL, filter capacitor C2, compensation inverter NB, filter inductance L1, filter capacitor C1, compensation
Transformer T2, control panel KZ and alternating current voltage sampling device U1 provide circuit for controlling motor when system power grid occurs shaking electricity
Normal operating voltage guarantees that motor works normally, avoids biggish economic loss；The principle of compensation anti-shake electric installation is simultaneously
Voltage compensation is carried out when under-voltage, is compared with using uninterruptible power supply mode continuous service, reduces running wastage, and use
Standby Switching power mode is compared, and compensator transformer is serially connected in control circuit, does not need to switch, and reduces power supply switching problem
Caused by accident potential.
Detailed description of the invention
Present invention is further described in detail in the following with reference to the drawings and specific embodiments.
Fig. 1 is the circuit diagram of existing electric machine control system.
Fig. 2 is system circuit diagram of the invention.
Fig. 3 is the circuit diagram of the anti-shake electric installation of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
As shown in Fig. 2, the present invention provides a kind of compensation motor anti-swing electrical system, including power grid U phase power supply, V phase electricity
Source and W phase power supply, wherein the driving power that U phase power supply and V phase power supply are motor M, W phase power supply are the input electricity of control circuit
Source.
U phase power supply and V phase power supply pass through electrothermal relay FR and the normally opened main contact KM1 access motor M of contactor, W phase power supply
Connect control circuit.
Control circuit include the normally closed auxiliary contact FR1 of anti-shake electric installation, electrothermal relay being serially connected, stop button SB2,
The normally opened auxiliary contact KM2 of contactor is parallel on start button SB1 and contactor coil KM, start button SB1, W phase power supply connects
The input terminal of anti-shake electric installation is connect, control circuit connects anti-shake electric installation and picks out end.
When the grid voltage is normal, start button SB1 is pressed, W phase power supply is through the normally closed auxiliary contact FR of electrothermal relay, stopping
Button SB2, start button SB1 are powered to contactor control coil KM, contactor control coil KM, are attracted the normally opened main touching of contactor
Head KM1 and contactor normally opened auxiliary contact KM2, motor M operation；When power grid occurs to shake electricity, network voltage decline, anti-shake Denso
Setting in control circuit voltage compensation to normal range (NR), will be kept in contact the normally opened main contact KM1 of device and the normally opened auxiliary contact of contactor
KM2 is attracted, and is avoided rolling electricity from causing motor stopping, is realized the purpose of anti-shake electricity.When pressing stop button SB2, contactor control
Coil KM power loss, the normally opened main contact KM1 of contactor and the normally opened auxiliary contact KM2 of contactor are disconnected, and motor M is out of service.
Such as: when " shaking electricity " for dropping to AC145V from AC220V occurs for AC input, anti-shake electric installation is exported
The compensation AC energy of AC75V, the superimposed voltage of output end restore to AC220, guarantee that output end voltage meets motor in this way
The normal work requirement of control circuit.
As shown in figure 3, anti-shake electric installation includes isolating transformer T1, rectifier bridge ZL, filter capacitor C2, compensation inverter
NB, filter inductance L1, filter capacitor C1, compensator transformer T2, control panel KZ and alternating current voltage sampling device U1.Anti-shake electric installation
Input terminal connect isolating transformer T1, isolating transformer T1 connection rectifier bridge ZL, rectifier bridge ZL connection filter capacitor C2, filter
Capacitor C2 connection control panel KZ and compensation inverter NB, control panel KZ connection compensate inverter NB and alternating current voltage sampling device U1,
Compensate inverter NB connection filter inductance L1, filter inductance L I connection filter capacitor C1, filter capacitor C1 connection compensator transformer
T2, compensator transformer T2 and alternating current voltage sampling device U1 are all connected with the output end of anti-shake electric installation.
When work, the input terminal input AC of W phase power supply from anti-shake electric installation is electric, through isolating transformer T1, rectifier bridge ZL
With filter capacitor C2, AC energy is converted into direct current, direct current is as the input DC power for compensating inverter NB, simultaneously
For powering to control panel KZ；Alternating current voltage sampling device U1 detects the voltage of anti-shake electric installation output end, when alternating current voltage exists
When normal range (NR), control panel KZ does not issue driving pwm signal, and compensation inverter NB does not work；When alternating current voltage falls rapidly
When, control panel issues driving pwm signal, compensation inverter NB work, and direct current is converted into exchanging through overcompensation inverter NB
Electricity filters by filter inductance L1, filter capacitor C1, using compensator transformer T2, compensates anti-shake electric installation input terminal and fall
When it is under-voltage；Wherein, the height of offset voltage is to be realized according to the data of alternating current voltage sampling device U1 by control pwm signal
's.When alternating current voltage sampling device U1 detects that alternating current voltage is restored to normal range (NR), control panel does not issue driving PWM letter
Number, compensation inverter NB stops compensation.
On the one hand the effect of isolating transformer T1, compensator transformer T2 are adjustment main circuit operational voltage level, another party
Face realization compensation device is isolated with power grid, and when compensation device breaks down, power grid can be isolated, and does not influence motor control electricity
The normal work on road.
The present invention by accessing anti-shake electric installation in circuit for controlling motor, anti-shake electric installation include isolating transformer T1,
Rectifier bridge ZL, filter capacitor C2, compensation inverter NB, filter inductance L1, filter capacitor C1, compensator transformer T2, control panel KZ
Circuit for controlling motor normal operating voltage is provided when system power grid occurs shaking electricity with alternating current voltage sampling device U1, is guaranteed
Motor works normally, and avoids biggish economic loss；The principle of compensation anti-shake electric installation is that electricity is carried out when under-voltage simultaneously
Pressure compensation, is compared with using uninterruptible power supply mode continuous service, reduces running wastage, and use standby Switching power mode
It compares, compensator transformer is serially connected in control circuit, does not need to switch, and reduces accident potential caused by power supply switching problem.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the invention
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close
Suitable mode combines.
Above content is only to structure of the invention example and explanation, affiliated those skilled in the art couple
Described specific embodiment does various modifications or additions or is substituted in a similar manner, without departing from invention
Structure or beyond the scope defined by this claim, is within the scope of protection of the invention.
Claims (1)
1. a kind of compensation motor anti-swing electrical system, including power grid U phase power supply, V phase power supply and W phase power supply, U phase power supply and V phase
Power supply accesses motor M by electrothermal relay FR and the normally opened main contact KM1 of contactor, and W phase power supply connects control circuit, control circuit
The normally closed auxiliary contact FR1 of electrothermal relay, stop button SB2, start button SB1 and contactor coil KM including being serially connected,
The normally opened auxiliary contact KM2 of contactor is parallel on start button SB1, it is characterised in that: the control circuit further includes anti-shake
Electric installation, the anti-shake electric installation are connected in control circuit, and the W phase power supply connects the input terminal of anti-shake electric installation,
The output end of the anti-shake electric installation connects the normally closed auxiliary contact FR1 of electrothermal relay；
The anti-shake electric installation includes isolating transformer T1, rectifier bridge ZL, filter capacitor C2, compensation inverter NB, filtered electrical
Feel L1, filter capacitor C1, compensator transformer T2, control panel KZ and alternating current voltage sampling device U1；
The input terminal of the anti-shake electric installation connects isolating transformer T1, the isolating transformer T1 connection rectifier bridge ZL,
Rectifier bridge ZL connection the filter capacitor C2, the filter capacitor C2 connection control panel KZ and compensation inverter NB, it is described
Control panel KZ connection compensate inverter NB and alternating current voltage sampling device U1, the compensation inverter NB connection filter inductance
L1, the described filter inductance L1 connection filter capacitor C1, the filter capacitor C1 connection compensator transformer T2, the compensation
Transformer T2 and alternating current voltage sampling device U1 is all connected with the output end of anti-shake electric installation；
The input terminal input AC of W phase power supply from anti-shake electric installation is electric, through isolating transformer T1, rectifier bridge ZL and filter capacitor
AC energy is converted into direct current, input DC power of the direct current as compensation inverter NB, while controlled for giving by C2
Plate KZ power supply；Alternating current voltage sampling device U1 detects the voltage of anti-shake electric installation output end, when alternating current voltage is in normal range (NR),
Control panel KZ does not issue driving pwm signal, and compensation inverter NB does not work；When alternating current voltage falls rapidly, control panel KZ
Driving pwm signal is issued, compensation inverter NB work, direct current is converted into alternating current through overcompensation inverter NB, by filtering
Inductance L1, filter capacitor C1 filtering, using compensator transformer T2, compensate under-voltage when anti-shake electric installation input terminal falls；Its
In, the height of offset voltage is to be realized according to the data of alternating current voltage sampling device U1 by control pwm signal；Work as alternating current
When pressure sampler U1 detects that alternating current voltage is restored to normal range (NR), control panel KZ does not issue driving pwm signal, compensates inversion
Device NB stops compensation；
When the grid voltage is normal, start button SB1 is pressed, W phase power supply is pressed through the normally closed auxiliary contact FR1 of electrothermal relay, stopping
Button SB2, start button SB1 are powered to contactor coil KM, contactor coil KM, are attracted the normally opened main contact KM1 of contactor and connect
Tentaculum normally opened auxiliary contact KM2, motor M operation；When power grid occurs to shake electricity, network voltage decline, anti-shake electric installation will be controlled
In circuit voltage compensation to normal range (NR), it is kept in contact the normally opened main contact KM1 of device and the normally opened auxiliary contact KM2 of contactor is attracted,
Rolling electricity is avoided to cause motor stopping；When pressing stop button SB2, contactor coil KM power loss, the normally opened main contact KM1 of contactor
It is disconnected with the normally opened auxiliary contact KM2 of contactor, motor M is out of service；
When the rolling electricity for dropping to AC145V from AC220V occurs for AC input, the compensation of anti-shake electric installation output AC75V is handed over
Galvanic electricity energy, the superimposed voltage of output end restore to AC220V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610574576.8A CN106208339B (en) | 2016-07-20 | 2016-07-20 | A kind of compensation motor anti-swing electrical system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610574576.8A CN106208339B (en) | 2016-07-20 | 2016-07-20 | A kind of compensation motor anti-swing electrical system |
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| CN106208339A CN106208339A (en) | 2016-12-07 |
| CN106208339B true CN106208339B (en) | 2019-04-12 |
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| CN108767865A (en) * | 2018-07-05 | 2018-11-06 | 安徽省化工设计院 | A kind of fast switch type voltage-sag prevention device of motor |
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