CN107769664A - A kind of drive electrical equipment with adjusting zero point type isolating transformer - Google Patents
A kind of drive electrical equipment with adjusting zero point type isolating transformer Download PDFInfo
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- CN107769664A CN107769664A CN201711260789.4A CN201711260789A CN107769664A CN 107769664 A CN107769664 A CN 107769664A CN 201711260789 A CN201711260789 A CN 201711260789A CN 107769664 A CN107769664 A CN 107769664A
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- 238000012360 testing method Methods 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 claims description 10
- 238000002955 isolation Methods 0.000 claims description 5
- 230000000712 assembly Effects 0.000 claims description 2
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/26—Power factor control [PFC]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/02—Arrangements or methods for the control of AC motors characterised by a control method other than vector control specially adapted for optimising the efficiency at low load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/14—Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/02—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using supply voltage with constant frequency and variable amplitude
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
- Ac-Ac Conversion (AREA)
Abstract
The present invention relates to a kind of power back-off equipment, in particular it is a kind of drive electrical equipment with adjusting zero point type isolating transformer, including sampling module SIG E, main power source input La, Voltage stabilizing module Ta, isolating transformer Tb, power detecting module, reference ground end N, master controller, compensating switch KM, compensating module CR and main power source output end Lb, isolating transformer Tb is provided between the main power source input La and main power source output end Lb, the isolating transformer Tb is arranged between power detecting module and compensating switch KM, the input of the isolating transformer Tb is connected with reference ground end N, the control signal input of the isolating transformer Tb and the signal output part of master controller connect.Its advantage is：Motor torque can be adjusted and realize that the full torque of motor starts, the function that there is voltage stabilizing to reduce magnitude of voltage fluctuation, the load current of distribution transformer, distribution line can be reduced, so as to reduce unwanted losses, improve the power factor of whole electricity system.
Description
Technical field
In particular it is a kind of to carry adjusting zero point type isolating transformer the present invention relates to a kind of power back-off equipment
Drive electrical equipment.
Background technology
AND ENERGY RESOURCES CONSUMPTION IN CHINA total amount is in ascendant trend, wherein industrial energy consumption account for national energy resource consumption year by year at present
70% or so of total amount, motor are the main power consumption terminal of industrial circle again, and electricity consumption accounts for the 75% of commercial power total amount.
Motor has two kinds of operating modes of speed governing and not speed governing in the application, accounts for more than 60% energy consumption for not needing speed regulating control motor
Problem is almost ignored by people, and most not bunchers have protection simply, lacks accident analysis and record, inefficient
Operation, the problem of waste of energy is serious.
It is widely used at present that shunt capacitor is installed in switchgear house transformer low voltage outlet side, produced to offset inductive load
Reactive loss, but the reactive loss of motor circuit can not be offset, and entirely compensate amount control in relatively low model
In enclosing (0.9-0.95), in order to avoid overcompensation.
Turn because motor output can occur for the change of peak valley mean period and the change of production process of electric power system
Square deficiency or low load with strong power phenomenon, increase system loss, the peace waste electric energy, improve supply line's temperature rise, reducing system
Quan Xing.
Such as number of patent application is that a kind of of CN201620742672.4 drives electrical equipment, including drive circuit board and periphery electricity
Road, wherein drive circuit board include：Power detecting end, power input, SCR control end, current transformer end, radiation air
Fan control terminal, Voltage stabilizing module and single-chip microcomputer；Power input is connected by the power input pin of Voltage stabilizing module Ta and single-chip microcomputer
Connect；Peripheral circuit includes：Reverse-blocking tetrode thyristor, reactive power compensation circuit, fuse and inductor；The control terminal of reverse-blocking tetrode thyristor with
The SCR control end connection of drive circuit board；The input of reverse-blocking tetrode thyristor is connected with fuse；The output of reverse-blocking tetrode thyristor
End is connected with reactive power compensation circuit；Inductor is connected with current transformer end；Output end and nothing of the inductor in reverse-blocking tetrode thyristor
Mutual inductance occurs for the junction of work(compensation circuit.The invention can not need to carry out power benefit exactly according to actual use in circuit
Repay, and in supply line's voltage instability can not normal use, uncontrollable motor torque, can not realize that motor completely turns
Square starts.
The content of the invention
, can be according to power supply matter it is an object of the invention to provide a kind of drive electrical equipment with adjusting zero point type isolating transformer
Amount and production technology change, improve the torque of motor, and the output torque and production technology for making motor are adapted, and band carries dynamic
Adjust transformer the method for operation, avoid torque deficiency and low load with strong power phenomenon, make motor parameter in real time tend to
The state of load factor dynamic equilibrium, reduce the unnecessary torque of motor；The power factor of whole electricity system can also be improved, is subtracted
Small distribution transformer, the load current of supply line, so as to reduce unwanted losses, the temperature rise of whole supply line is reduced, is had
Higher economic use value, improve the security of supply line；And isolating transformer Tb can be according to the change of load factor
Change the automatic conversion for realizing working condition, can make drive electrical equipment that there is good security and economy under broad load factor
Property.
The purpose of the present invention is achieved through the following technical solutions：
A kind of drive electrical equipment with adjusting zero point type isolating transformer, including sampling module SIG-E, main power source input
La, Voltage stabilizing module Ta, isolating transformer Tb, power detecting module, reference ground end N, master controller, compensating switch KM, compensation
Module CR and main power source output end Lb, the main power source input La access three-phase alternating current, the power supply of the Voltage stabilizing module Ta
The output end difference of output end connection sampling module SIG-E power input, the reference ground end N and power detecting module
It is connected with sampling module SIG-E input, is provided with and isolates between the main power source input La and main power source output end Lb
Transformer Tb, the sampling module SIG-E output end connection master controller, the output end connection compensating switch KM of master controller
Control terminal, one end of the compensating switch KM is connected between power detecting module and main power source output end Lb, the compensation
Switch KM other end connection compensating module CR, the isolating transformer Tb be arranged on power detecting module and compensating switch KM it
Between, the input of the isolating transformer Tb is connected with reference ground end N, the control signal input of the isolating transformer Tb
It is connected with the signal output part of master controller.
As the further optimization of the technical program, a kind of drive electricity with adjusting zero point type isolating transformer of the present invention
Device, the isolating transformer Tb include transformer coil group, two-way interlocking contact device and barrier assembly, the transformer coil group
Three secondary coils being oppositely arranged including three primary coils and respectively with three primary lines, three primary coils it is defeated
Entering end to be connected with main power source input La, the output end of three primary coils is connected with main power source output end Lb, and described three
One end of individual secondary coil is connected with reference ground end N, and the other end of three secondary coils is with being connected to the mutual interlocking of two-way
Between tentaculum and barrier assembly, the two-way interlocking contact device includes two Switch input terminals and two Switch output terminals,
One end connection that described two Switch input terminals are not connected with a secondary coil with reference ground end N, it is described two to open
Close lead-out terminal and connect the output end and reference ground end N of a primary coil respectively, described two Switch input terminals with
The input connection of barrier assembly, the two-way interlocking contact device and barrier assembly are each provided with three, three isolation groups
The output end of part is connected with reference ground end N.
As the further optimization of the technical program, a kind of drive electricity with adjusting zero point type isolating transformer of the present invention
Device, fuse I is provided between the output end of the Switch output terminal and primary coil.
As the further optimization of the technical program, a kind of drive electricity with adjusting zero point type isolating transformer of the present invention
Device, it is the double contact switch of series connection between the Switch input terminal and Switch output terminal of the two-way interlocking contact device 1KM.
As the further optimization of the technical program, a kind of drive electricity with adjusting zero point type isolating transformer of the present invention
Device, the power detecting module include voltage detecting end FU and idle test side TA, the input bag of the voltage detecting end FU
Three voltage detecting end FU are included, three voltage detecting end FU connect three power transmission lines of three-phase alternating current, the nothing respectively
Work(test side TA includes three idle test side TA, and three idle test side TA are provided with inductance coil, three inductance
Coil is wrapped on three power transmission lines of three-phase alternating current respectively, the voltage detecting end FU and idle test side TA output end
Sampling module SIG-E input is connected respectively.
As the further optimization of the technical program, a kind of drive electricity with adjusting zero point type isolating transformer of the present invention
Device, fuse II is provided between three power transmission lines of three voltage detecting end FU and three-phase alternating current.
As the further optimization of the technical program, a kind of drive electricity with adjusting zero point type isolating transformer of the present invention
Device, the output end of the sampling module SIG-E are connected with LCD display module.
As the further optimization of the technical program, a kind of drive electricity with adjusting zero point type isolating transformer of the present invention
Device, the master controller are internally provided with clock timing module.
As the further optimization of the technical program, a kind of drive electricity with adjusting zero point type isolating transformer of the present invention
Device, the compensating module CR include multiple compensators, are provided with three groups of compensating electric capacities in compensator, the compensating electric capacity is by multiple
Electric capacity is composed in parallel, and resistance is connected in parallel in compensating electric capacity.
As the further optimization of the technical program, a kind of drive electricity with adjusting zero point type isolating transformer of the present invention
Device, the input of three groups of compensating electric capacities are connected with compensating switch KM, the input and the 3rd group of benefit of first group of compensating electric capacity
The output end connection of electric capacity is repaid, the output end of first group of compensating electric capacity is connected with the input of second group of compensating electric capacity, second group
The output end of compensating electric capacity is connected with the input of the 3rd group of compensating electric capacity.
A kind of drive electrical equipment with adjusting zero point type isolating transformer of the invention has the beneficial effect that：
A kind of drive electrical equipment with adjusting zero point type isolating transformer of the present invention, it is provided with sampling module SIG-E, power supply inspection
Module and compensating switch KM are surveyed, compensating module CR work, Ke Yiyou can be accurately controlled according to the working condition of circuit devcie
Effect avoids parallel resonance harmonic scale-up problem；Three-phase voltage, the electricity of motor can be measured in real time by sampling module SIG-E
Stream, active power, reactive power, apparent energy, power factor, load characteristic, frequency, and indicated by LCD display module
Current motor load rate, and four-quadrant show power, and personnel can be prompted to be adjusted to transformer to meet electricity
Road uses needs；Transformer is provided with, is changed according to the power supply state of motor and load factor, with load dynamic regulation transformer
Working condition, so as to adjust circuit voltage, torque deficiency and low load with strong power phenomenon are avoided, motor parameter is become in real time
To the state with load factor dynamic equilibrium, the unnecessary torque of motor is reduced；Fuse is provided with, can effectively prevent power supply electricity
Pressing through load causes compensating switch KM or compensating module CR to damage；When the frequent start-stop of motor, master controller passes through clocking capability
Compensating module CR work is interrupted, can effectively prevent from compensating excessive, the problem of motor voltage overloads；Can be to frequency, electricity
Pressure, electric current, power, power factor, current/voltage degree of unbalancedness, load characteristic, voltage/current percent harmonic distortion, requirement, phase
The parameter setting of sequence is out-of-limit, and alarm is carried out by master controller, and records the time of origin and motor fortune of alert event
The row time；And isolating transformer Tb can make drive electric according to the automatic conversion for realizing working condition of change of load factor
Device has good security and economy under broad load factor.
Brief description of the drawings
The present invention will be further described in detail with specific implementation method below in conjunction with the accompanying drawings.
Fig. 1 is the hardware architecture diagram of the present invention；
Fig. 2 is the integrated circuit schematic diagram of the present invention；
Fig. 3 is compensating module CR of the present invention elementary diagram；
Fig. 4 is isolating transformer Tb of the present invention elementary diagram；
Fig. 5 is sampling module SIG-E of the present invention elementary diagram；
Fig. 6 is the pin schematic diagram of master controller of the present invention；
Fig. 7 is the communication module partial schematic diagram one between master controller and sampling module SIG-E of the present invention；
Fig. 8 is the communication module partial schematic diagram two between master controller and sampling module SIG-E of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
Embodiment one：
With reference to Fig. 1-7 illustrate present embodiment, below description be merely illustrative, never be used as to the present invention and
Its any restrictions applied or used, it should be noted that：Similar label and letter represents similar terms in following accompanying drawing.
A kind of drive electrical equipment with adjusting zero point type isolating transformer, including sampling module SIG-E, main power source input
La, Voltage stabilizing module Ta, isolating transformer Tb, power detecting module, reference ground end N, master controller, compensating switch KM, compensation
Module CR and main power source output end Lb, the main power source input La include the three-phase line for connecting three-phase alternating current respectively
La1, La2 and La3 terminal, the Voltage stabilizing module Ta are used as system light current power supply by AC-DC rectification and decompression, and
Voltage stabilizing module Ta can use the battery of processing and corresponding voltage-stabilizing device, Voltage stabilizing module Ta power output end connection sampling
The output end of module SIG-E power input, the reference ground end N and power detecting module respectively with sampling module SIG-
E input connection, the isolating transformer Tb are adjusting zero point type isolating transformer Tb, and the isolating transformer Tb is arranged on
Between power detecting module and compensating switch KM, the controlling switch of the isolating transformer Tb is positive safe NC822 series switch,
The control signal input of isolating transformer Tb controlling switch and the signal output part of master controller connect, the isolation transformation
Device Tb input is connected with reference ground end N, the control signal input of the isolating transformer Tb and the letter of master controller
The connection of number output end, it is that surge voltage can be eliminated the advantages of the isolating transformer Tb more common transformer, and helps
The repid discharge under pressure-lowering condition, while be more applicable for each operating mode of motor and use, can have and solve power back-off equipment work
The problem of full torque of motor starts can not be realized when making.Reference ground end N is as measurement voltage and the sinusoidal frequency of detection alternating current
The reference voltage of spectrum, the main power source input La connect with main power source output end Lb, and the main power source output end Lb includes
Lb1, Lb2 and Lb3, the output end connection master controller of the sampling module SIG-E, the output end connection compensation of master controller are opened
KM control terminal is closed, the compensating switch KM is the CK3 collection of contact devices in Changshu, and the compensating switch KM includes what is be connected in parallel
2KM, 3KM and 4KM, sampling module SIG-E calculate magnitude of voltage, reactive power and circuit according to the input data of power detecting module
Power factor, and foundation and the foundation of control isolating transformer Tb transformation values in this, as control compensating switch KM, the benefit
The one end for repaying switch KM is connected between power detecting module and main power source output end Lb, and the other end of the compensating switch KM connects
Meet compensating module CR；When power input voltage is relatively low, to ensure electricity consumption motor normal work, main controller controls compensating switch
KM, which disconnects, prevents a series of problems, such as compensating more degree causes capacitors self-healing to strengthen, and capacitance loss is accelerated, and capacitor fails ahead of time,
And master controller can control isolating transformer Tb to boost, prevent that compensating module CR is accessed when voltage is relatively low causes motor to turn round
Square deficiency；When master controller is by the increase that is calculated that system voltage is stable and motor operates, motor is idle enough, master control
Device control compensating switch KM processed is connected, compensating module CR access circuits, can supply the part reactive power of inductive reactance consumption,
The load current of distribution transformer, distribution line can be reduced with this；The conductor cross-section area of distribution line can be reduced, reduce enterprise
The capacity of distribution transformer, reduce enterprise's distribution transforming and the active loss of distribution network；Because the present apparatus is arranged on distribution line end
End, it can reduce transmission losses by way of reducing whole supply line's electric current, there is maximized non-work economic equivalent；
Simultaneously in the presence of compensating module CR, the starting current of motor can be reduced, the startup loss of motor is reduced, is advantageous to
Improve the service life of motor；The model STM32F103C8T6 for the controller chip that the master controller uses, it is described to adopt
Egf block SIG-E model Acuvim II type three-phase power detection devices, Acuvim II series multifunctional network electric power instrument
Table is designed using most modern microprocessor and Digital Signal Processing.Gather comprehensive three phase electrical/display,
Energy accumulation, power quality analysis, fault alarm, trend record, quality of power supply logout, waveform recording, time-sharing measurement with
Network service is.Giant-screen, high-resolution liquid crystal display fully meet your vision requirement, and graceful, bright backlight is shown
You is set also can easily to consult measurement data under faint light；Acuvim II series of products can be used as instrument to be used alone, substitution
A large amount of traditional simulation instrument, can act also as the anterior member of electric power monitoring system, to realize remote data acquisition and control；
Acuvim II series instruments are due to introducing Digital Signal Processing so that online power quality analysis becomes can
Energy.The total harmonic distortion factor of each phase voltage, electric current, voltage crest factor, current coefficient, each harmonic component and voltage, electric current
Degree of unbalancedness can measure in real time；Pass through the RS-485 communication interfaces built in Acuvim II series multifunctional network electric power instruments
Realize the communication between master controller and sampling module SIG-E.
The isolating transformer Tb includes transformer coil group, two-way interlocking contact device 1KM and barrier assembly, the transformation
Device coil group includes three primary coils and three secondary coils being oppositely arranged respectively with three primary lines, three primary
Input ua1, ub1 and uc1 of coil are connected with La1, La2 and La3 on main power source input La respectively, three primary
Output end ua2, ub2 and uc2 of coil are connected with Lb1, Lb2 and Lb3 on main power source output end Lb respectively, three secondary
One end ua4, ub4 and uc4 of coil are connected with reference ground end N, the other end ua3, ub3 of three secondary coils and
Uc3 is connected between two-way interlocking contact device 1KM and barrier assembly, and the two-way interlocking contact device 1KM is provided with three, respectively
For 1KM1,1KM2 and 1KM3 in figure, the two-way interlocking contact device 1KM includes two Switch input terminals and two switches are defeated
Go out terminal, described two Switch input terminals are not with a secondary coil with one end that reference ground end N is connected as in figure
Ua3 or Ub3 or Uc3 connections, described two Switch output terminals connect the output end and reference ground of a primary coil respectively
N is held, described two Switch input terminals are connected with the input of barrier assembly, the two-way interlocking contact device 1KM and isolation
Component is each provided with three, and the output end of three barrier assemblies is connected with reference ground end N, and the barrier assembly is by more
Individual capacitor element in parallel and isolation resistance in parallel therewith composition；As shown in figure 4, described 1KM1,1KM2 and 1KM3 model
It is the CK3 collection of contact devices in Changshu, the signal output part of master controller and 1KM1,1KM2 and 1KM3 control signal input
Connection, when 1KM1 is connected, ua3, Ra2, Ra1 and Lb1 composition path I, ua3, barrier assembly and reference ground end N form logical
Road II, ua3, Ra4, Ra3 and reference ground end N form path III, when 1KM2 and 1KM3 are connected with this similarly；Path I is by ua3
Secondary coil voltage as offset voltage, to compensate the Lb1 on main power source output end Lb；Path II is made through barrier assembly
With playing voltage stabilizing, filtering and capacitive reactance compensating action, under the synergy of path I and path II, can solve traditional transformer
Start to reach the full torque of motor, start overtension, kwh loss is big, the problems such as voltage pulsation shakiness；Path III is used for
The electric energy inside barrier assembly is consumed, is advantageous to electric capacity repid discharge；The isolating transformer Tb is higher in load factor, such as negative
Load rate is not saved when being more than 80% when needs, the short circuit of isolating transformer Tb zero points, is at this time equivalent to be in circuit
A reactor is added, plays the function of chokes, without the function of transformer, total head power supply；When load factor meets change
Condition, for example, the load factor moon be 60% when, isolating transformer Tb zero points open circuit, now isolating transformer Tb work, reduce it is electronic
The input power of machine, loss is reduced, is increased economic efficiency；By isolating transformer Tb use, drive electrical equipment can be made broad
Load factor under have good security and economy.
Fuse I, output switching terminal are provided between the output end ua2 of the Switch output terminal Ra1 and primary coil
The output end of fuse I, Switch output terminal Rc1 and primary coil is provided between sub- Rb1 and primary coil output end ub2
Fuse I is provided between uc2, circuit protection is carried out with this.
It is that the double-contact of series connection is opened between the Switch input terminal and Switch output terminal of the two-way interlocking contact device
Close, the partial pressure by way of setting up switch contact, avoid switch from getting an electric shock and damage, improve the service life of two-way interlocking contact device.
The power detecting module includes voltage detecting end FU and idle test side TA, the input of the voltage detecting end FU
End includes three voltage detecting end FU FU1, FU2 and FU3, and three voltage detecting end FU FU1, FU2 and FU3 connect three respectively
Three power transmission lines of cross streams electricity, the idle test side TA include three idle test side TA TAa, TAb and TAc, three
Inductance coil is provided with idle test side TA TAa, TAb and TAc, three inductance coils are wrapped in three-phase alternating current respectively
Three power transmission lines on, three idle test side TA TAa, TAb and TAc produce corresponding sensing in alternating current galvanization
Electromotive force, in this, as the sinusoidal spectrum signal of alternating current, the voltage detecting end FU and idle test side TA output end point
Not Lian Jie sampling module SIG-E input, whether master controller is by this signal calculation circuit power factor, as controlling and connect
Logical compensating switch KM control foundation.
Fuse II is provided between three power transmission lines of three voltage detecting end FU and three-phase alternating current, with
This is protected to sampling module SIG-E and voltage detecting end FU, prevents excessively stream from burning circuit devcie.
The output end of the sampling module SIG-E is connected with LCD display module, and sampling module SIG-E will be calculated
Magnitude of voltage, power factor, useful work and idle work numerical value, which are sent in LCD display module, to be shown, is easy to plant maintenance personnel real
When check and understand working state of system；Meanwhile LCD display module is displayed for magnitude of voltage and isolating transformer Tb change
Numerical value is pressed, by LCD display module personnel can be prompted to adjust isolating transformer Tb manually to meet the use needs of circuit.
For needing frequent starting and stopping motor, because motor is risen in the changing-over of power supply two-phase or quickly, frequently or the stopping time,
Motor is still operated with higher rotation speed because of inertia after dump, and the capacitor of compensation turns into motor magnetoelectricity by electric discharge
Stream, makes electric motor operation in generating state.The voltage that now motor is sent and the general phase of supply voltage and then put into
Difference, will produce big impact torque in a flash, compensating module CR and motor damages be caused with this, to avoid problems from sending out
Raw, heretofore described master controller is internally provided with clock timing module, and master controller records the motor starting and stopping time, and
Time cumulation is carried out by clock timing module, increases time threshold Tmin in main controller controls program, such as motor two
The secondary difference for starting time and a downtime before motor is less than time threshold Tmin, then control disconnects compensating switch KM,
This starts compensating module CR and is not involved in work；Such as the difference of a downtime before motor restarting time and motor
More than time threshold Tmin, then control connects compensating switch KM, makes compensating module CR normal works；The time threshold Tmin should
Electric capacity electricity in the complete consumption and compensation module CR of resistance in adequate remedy module CR.
The compensating module CR includes multiple compensators, and three groups of compensating electric capacities, the compensating electric capacity are provided with compensator
Composed in parallel by multiple electric capacity, resistance is connected in parallel in compensating electric capacity；When idle increase in circuit, compensating module CR starts
Work, multiple electric capacity trickle charges, electric discharge are most of to the reactive current needed for motor to be supplied by multiple electric capacity, can with this
To improve the power factor of whole supply line, resistance in parallel is used to make in consumption electric capacity in motor failure in compensating electric capacity
The electric energy of storage, two voltage superpositions cause the voltage overload of motor when preventing next be powered.
The input of three groups of compensating electric capacities is connected with compensating switch KM, the input and the 3rd of first group of compensating electric capacity
The output end connection of group compensating electric capacity, the output end of first group of compensating electric capacity are connected with the input of second group of compensating electric capacity, the
The output end of two groups of compensating electric capacities is connected with the input of the 3rd group of compensating electric capacity, and the discharge and recharge that each electric capacity can be improved with this is imitated
Rate, and be advantageous to the electric energy for making quick consumption capacitor memory storage in shutdown.
A kind of drive electrical equipment with auto-transformer of the present invention, its operation principle are：When in two-way interlocking contact device 1KM
1KM1 connect when, transformer coil ua3, Ra2, Ra1 and Lb1 composition path I, ua3, barrier assembly and reference ground end
N forms path II, and ua3, Ra4, Ra3 and reference ground end N of transformer coil form path III, when 1KM2 and 1KM3 are connected with
This is similarly；Path I is using the secondary coil voltage at ua3 as offset voltage, to compensate the Lb1 on main power source output end Lb；
Path II acts on through barrier assembly, plays voltage stabilizing, filtering and capacitive reactance compensating action, under the synergy of path I and path II,
Can solve traditional transformer and start to reach the full torque of motor, start overtension, kwh loss is big, and voltage pulsation is unstable
The problems such as；Path III is used to consume the electric energy inside barrier assembly, is advantageous to electric capacity repid discharge；
The present apparatus be arranged on electricity consumption motor with regard to inlet side, when power input voltage is relatively low, to ensure electricity consumption motor just
Often work, main controller controls compensating switch KM disconnect, and prevent that compensating more degree causes capacitors self-healing to strengthen, capacitance loss adds
Hurry up, capacitor ahead of time fail a series of problems, such as, and master controller can control isolating transformer Tb boost, prevent voltage compared with
Compensating module CR is accessed when low causes motor torque insufficient；When master controller is stable and enough by the way that system voltage is calculated
When motor operating, motor is idle increase, main controller controls compensating switch KM is connected, compensating module CR access circuits, can be with
The part reactive power of inductive reactance consumption is supplied, the load current of distribution transformer, distribution line can be reduced with this；It can reduce
The conductor cross-section area of distribution line, reduce the capacity of enterprise distribution transformer, reduce the active of enterprise's distribution transforming and distribution network
Loss；Because the present apparatus is arranged on distribution line terminal, transmission of electricity can be reduced by way of reducing whole supply line's electric current
Loss, has maximized non-work economic equivalent；Simultaneously in the presence of compensating module CR, the startup electricity of motor can be reduced
Stream, the startup loss of motor is reduced, be advantageous to improve the service life of motor；For needing frequent starting and stopping motor, because
For motor the changing-over of power supply two-phase or it is quick, frequently rise or the stopping time, motor is because inertia is still with higher turn after dump
Speed operating, the capacitor of compensation turn into motor magnetoelectricity stream by electric discharge, make electric motor operation in generating state.It is now electronic
The voltage that machine is sent is different from the general phase of the supply voltage and then put into, big impact torque will be produced in a flash, with this
Compensating module CR and motor damages are caused, to avoid problems, heretofore described master controller is internally provided with
Clock timing module, the master controller record motor starting and stopping time, and time cumulation is carried out by clock timing module, in master
Increase time threshold Tmin in controller control program, such as a downtime before motor restarting time and motor
Difference is less than time threshold Tmin, then control disconnects compensating switch KM, and this starts compensating module CR and is not involved in work；It is such as electronic
The difference of machine restarting time and a downtime before motor are more than time threshold Tmin, then compensating switch is connected in control
KM, make compensating module CR normal works；The time threshold Tmin answers the complete consumption and compensation mould of resistance in adequate remedy module CR
Electric capacity electricity in block CR；
The output end of the sampling module SIG-E is connected with LCD display module, and sampling module SIG-E will be calculated
Magnitude of voltage, power factor, useful work and idle work numerical value, which are sent in LCD display module, to be shown, is easy to plant maintenance personnel real
When check and understand working state of system；Meanwhile LCD display module is displayed for magnitude of voltage and isolating transformer Tb change
Numerical value is pressed, by LCD display module personnel can be prompted to adjust isolating transformer Tb manually to meet the use needs of circuit；
The isolating transformer Tb is arranged between power detecting module and compensating switch KM；Compensating module CR is ensured with this
It is operated in satisfactory voltage range, avoids brownout from causing motor torque deficiency or overtension to cause to compensate mould
Block CR or motor damages；
The control signal input of the isolating transformer Tb and the signal output part of master controller connect, and master controller leads to
Cross input voltage value and automatically control isolating transformer Tb work, can both avoid brownout from causing motor torque insufficient, again
Motor torque can be controlled in real time as desired by transformation, put forward the practicality and reliability for having given birth to the present apparatus；
The advantages of isolating transformer Tb more common transformer, is that surge voltage can be eliminated, and helps to be depressured
Under the conditions of repid discharge, while be more applicable for each operating mode of motor and use, can have when solving the work of power back-off equipment without
Method realizes the problem of full torque of motor starts.
Certainly, described above is not limitation of the present invention, and the present invention is also not limited to the example above, the art
The variations, modifications, additions or substitutions that those of ordinary skill is made in the essential scope of the present invention, fall within the guarantor of the present invention
Protect scope.
Claims (10)
1. a kind of drive electrical equipment with adjusting zero point type isolating transformer, including sampling module SIG-E, main power source input La,
Voltage stabilizing module Ta, isolating transformer Tb, power detecting module, reference ground end N, master controller, compensating switch KM, compensating module
CR and main power source output end Lb, it is characterised in that：The main power source input La accesses three-phase alternating current, the Voltage stabilizing module Ta
Power output end connection sampling module SIG-E power input, the output of the reference ground end N and power detecting module
Hold the input respectively with sampling module SIG-E to be connected, set between the main power source input La and main power source output end Lb
There are isolating transformer Tb, the sampling module SIG-E output end connection master controller, master controller goes out defeated end connection compensation
KM control terminal is switched, one end of the compensating switch KM is connected between power detecting module and main power source output end Lb, institute
Compensating switch KM other end connection compensating module CR is stated, the isolating transformer Tb is arranged on power detecting module and opened with compensation
Between closing KM, the input of the isolating transformer Tb is connected with reference ground end N, the control signal of the isolating transformer Tb
The signal output part of input and master controller connects.
A kind of 2. drive electrical equipment with adjusting zero point type isolating transformer according to claim 1, it is characterised in that：It is described
Isolating transformer Tb includes transformer coil group, two-way interlocking contact device and barrier assembly, and the transformer coil group includes three
Individual primary coil and three secondary coils being oppositely arranged respectively with three primary lines, the input of three primary coils with
The La connections of main power source input, the output end of three primary coils are connected with main power source output end Lb, three secondary
One end of coil is connected with reference ground end N, the other ends of three secondary coils be connected to two-way interlocking contact device and every
From between component, the two-way interlocking contact device includes two Switch input terminals and two Switch output terminals, described two
One end connection that Switch input terminal is not connected with a secondary coil with reference ground end N, described two output switching terminals
Son connects the output end and reference ground end N of a primary coil respectively, and described two Switch input terminals are and barrier assembly
Input connection, the two-way interlocking contact device and barrier assembly be each provided with three, the output of three barrier assemblies
End is connected with reference ground end N, the barrier assembly isolation resistance group in parallel by multiple capacitor elements in parallel and therewith
Into.
A kind of 3. drive electrical equipment with adjusting zero point type isolating transformer according to claim 2, it is characterised in that：It is described
Fuse I is provided between Switch output terminal and the output end of primary coil.
A kind of 4. drive electrical equipment with adjusting zero point type isolating transformer according to claim 2, it is characterised in that：It is described
It is the double contact switch of series connection between the Switch input terminal and Switch output terminal of two-way interlocking contact device.
A kind of 5. drive electrical equipment with adjusting zero point type isolating transformer according to claim 1, it is characterised in that：It is described
Power detecting module includes voltage detecting end FU and idle test side TA, and the input of the voltage detecting end FU includes three electricity
Test side FU, three voltage detecting end FU are pressed to connect three power transmission lines of three-phase alternating current, the idle test side respectively
TA includes three idle test side TA, and three idle test side TA are provided with inductance coil, three inductance coil difference
It is wrapped on three power transmission lines of three-phase alternating current, the voltage detecting end FU and idle test side TA output end connect respectively
Sampling module SIG-E input.
A kind of 6. drive electrical equipment with adjusting zero point type isolating transformer according to claim 5, it is characterised in that：It is described
Fuse II is provided between three voltage detecting end FU and three power transmission lines of three-phase alternating current.
A kind of 7. drive electrical equipment with adjusting zero point type isolating transformer according to claim 1, it is characterised in that：It is described
Sampling module SIG-E output end is connected with LCD display module.
A kind of 8. drive electrical equipment with adjusting zero point type isolating transformer according to claim 1, it is characterised in that：It is described
Master controller is internally provided with clock timing module.
A kind of 9. drive electrical equipment with adjusting zero point type isolating transformer according to claim 1, it is characterised in that：It is described
Compensating module CR includes multiple compensators, is provided with three groups of compensating electric capacities in compensator, the compensating electric capacity by multiple electric capacity simultaneously
Connection is formed, and resistance is connected in parallel in compensating electric capacity.
A kind of 10. drive electrical equipment with adjusting zero point type isolating transformer according to claim 9, it is characterised in that：Institute
The input for stating three groups of compensating electric capacities is connected with compensating switch KM, the input and the 3rd group of compensating electric capacity of first group of compensating electric capacity
Output end connection, the output end of first group of compensating electric capacity is connected with the input of second group of compensating electric capacity, and second group of compensation is electric
The output end of appearance is connected with the input of the 3rd group of compensating electric capacity.
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| CN201711260789.4A Active CN107769664B (en) | 2017-10-31 | 2017-12-04 | Driver with adjustable zero point type isolation transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108471117A (en) * | 2018-04-13 | 2018-08-31 | 哈尔滨兴亚技术有限公司 | A kind of device improving electricity system efficiency |
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| CN207442725U (en) * | 2017-10-31 | 2018-06-01 | 哈尔滨兴亚技术有限公司 | A kind of drive electric appliance with adjusting zero point type isolating transformer |
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|---|---|
| CN107769664B (en) | 2023-12-22 |
| CN207442725U (en) | 2018-06-01 |
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