CN107769664B - Driver with adjustable zero point type isolation transformer - Google Patents
Driver with adjustable zero point type isolation transformer Download PDFInfo
- Publication number
- CN107769664B CN107769664B CN201711260789.4A CN201711260789A CN107769664B CN 107769664 B CN107769664 B CN 107769664B CN 201711260789 A CN201711260789 A CN 201711260789A CN 107769664 B CN107769664 B CN 107769664B
- Authority
- CN
- China
- Prior art keywords
- compensation
- isolation transformer
- module
- power supply
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002955 isolation Methods 0.000 title claims abstract description 89
- 238000001514 detection method Methods 0.000 claims abstract description 57
- 238000005070 sampling Methods 0.000 claims abstract description 31
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 10
- 239000003990 capacitor Substances 0.000 claims description 51
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000006698 induction Effects 0.000 claims description 4
- 238000009826 distribution Methods 0.000 abstract description 18
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000005457 optimization Methods 0.000 description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 229910052710 silicon Inorganic materials 0.000 description 7
- 239000010703 silicon Substances 0.000 description 7
- 230000009466 transformation Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000000819 phase cycle Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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]
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
- Ac-Ac Conversion (AREA)
Abstract
The invention relates to power compensation equipment, in particular to a driver with an adjustable zero point type isolation transformer, which comprises a sampling module SIG-E, a main power supply input end La, a voltage stabilizing module Ta, an isolation transformer Tb, a power supply detection module, a reference grounding end N, a main controller, a compensation switch KM, a compensation module CR and a main power supply output end Lb, wherein the isolation transformer Tb is arranged between the main power supply input end La and the main power supply output end Lb, the isolation transformer Tb is arranged between the power supply detection module and the compensation switch KM, the input end of the isolation transformer Tb is connected with the reference grounding end N, and the control signal input end of the isolation transformer Tb is connected with the signal output end of the main controller. The beneficial effects are as follows: the motor torque can be regulated, full motor torque starting is realized, the voltage stabilizing and voltage value fluctuation reducing functions are realized, and the load current of a distribution transformer and a distribution line can be reduced, so that useless loss is reduced, and the power factor of the whole power utilization system is improved.
Description
Technical Field
The invention relates to power compensation equipment, in particular to a driver with an adjustable zero point type isolation transformer.
Background
At present, the total energy consumption of China is in an annual rising trend, wherein the industrial energy consumption accounts for about 70% of the total energy consumption of China, the motor is a main power consumption terminal in the industrial field, and the power consumption accounts for 75% of the total industrial power consumption.
The motor has two working conditions of speed regulation and non-speed regulation in application, and the energy consumption problem of the motor which is more than 60 percent and does not need speed regulation control is almost ignored by people, and most of non-speed regulation motors have the problems of simple protection, lack of fault analysis and record, low-efficiency operation and serious electric energy waste.
At present, a parallel capacitor is widely arranged at the low-voltage outlet side of a distribution room transformer to offset reactive power loss generated by inductive load, but the reactive power loss of a motor power supply line cannot be offset, and the whole compensation limit is controlled in a lower range (0.9-0.95) so as to avoid overcompensation.
Because of the periodic variation of the peak Gu Ping of the power supply system and the variation of the production process, the phenomenon of insufficient output torque of the motor or large-sized malar trolley can occur, the system loss is increased, the electric energy is wasted, the temperature rise of the power supply circuit is improved, and the safety of the system is reduced.
An electrical driver, for example, of patent application number CN201620742672.4, comprises a drive circuit board and peripheral circuitry, wherein the drive circuit board comprises: the device comprises a power supply detection end, a power supply input end, a silicon controlled rectifier control end, a current transformer end, a cooling fan control end, a voltage stabilizing module and a singlechip; the power input end is connected with a power input pin of the singlechip through a voltage stabilizing module Ta; the peripheral circuit includes: the reactive compensation circuit comprises a silicon controlled switch, a reactive compensation circuit, a fuse and an inductor; the control end of the controllable silicon switch is connected with the controllable silicon control end of the driving circuit board; the input end of the silicon controlled switch is connected with the fuse; the output end of the controllable silicon switch is connected with the reactive compensation circuit; the inductor is connected with the current transformer end; the inductor is mutually transformed at the connection part of the output end of the controllable silicon switch and the reactive compensation circuit. The invention can not accurately perform power compensation according to actual use requirements in a circuit, can not be normally used when the voltage of a power supply line is unstable, can not control the torque of a motor, and can not realize full torque starting of the motor.
Disclosure of Invention
The invention aims to provide a driver with an adjustable zero point type isolation transformer, which can improve the torque of a motor according to the power supply quality and the production process change, so that the output torque of the motor is suitable for the production process, the running mode of the transformer is dynamically adjusted with load, the phenomena of insufficient torque and a large Marla trolley are avoided, the power supply parameter of the motor tends to be in a state of dynamic balance with the load factor in real time, and the redundant torque of the motor is reduced; the power factor of the whole power utilization system can be improved, and the load current of a distribution transformer and a power supply line is reduced, so that useless loss is reduced, the temperature rise of the whole power supply line is reduced, the economic use value is higher, and the safety of the power supply line is improved; and the isolation transformer Tb can automatically realize the conversion of the working state according to the change of the load rate, so that the driver has good safety and economy under wider load rate.
The aim of the invention is achieved by the following technical scheme:
the utility model provides a driver with adjustable zero point type isolation transformer, includes sampling module SIG-E, main power supply input La, voltage stabilizing module Ta, isolation transformer Tb, power detection module, benchmark earthing terminal N, main control unit, compensation switch KM, compensation module CR and main power supply output Lb, main power supply input La inserts three-phase alternating current, voltage stabilizing module Ta's power supply output connects sampling module SIG-E's power input, benchmark earthing terminal N and power detection module's output are connected with sampling module SIG-E's input respectively, be provided with isolation transformer Tb between main power supply input La and the main power supply output Lb, sampling module SIG-E's output is connected main control unit, and main control unit's output is connected compensation switch KM's control end, compensation switch KM's one end is connected between power detection module and main power supply output Lb, compensation switch KM's the other end is connected compensation module CR, isolation transformer Tb sets up between power detection module and compensation switch, isolation transformer's input and main control unit's input are connected with main control unit's input, isolation transformer Tb is connected with main control unit's input.
As a further optimization of the technical scheme, the invention provides a driver with an adjustable zero point type isolation transformer, wherein the isolation transformer Tb comprises a transformer coil group, a two-way interlocking contactor and an isolation component, the transformer coil group comprises three primary coils and three secondary coils which are respectively opposite to the three primary coils, the input ends of the three primary coils are connected with a main power input end La, the output ends of the three primary coils are connected with a main power output end Lb, one ends of the three secondary coils are connected with a reference grounding end N, the other ends of the three secondary coils are connected between the two-way interlocking contactor and the isolation component, the two-way interlocking contactor comprises two switch input terminals and two switch output terminals, the two switch input terminals are respectively connected with one end of one secondary coil which is not connected with the reference grounding end N, the two switch output terminals are respectively connected with the output end of one primary coil and the reference grounding end N, the two switch input terminals are respectively connected with the input end of the isolation component, the other ends of the two secondary coils are respectively connected with the three output ends of the isolation component, and the three output ends are respectively connected with the three ground components.
As a further optimization of the technical scheme, the invention provides the driver with the adjustable zero point type isolation transformer, and a fuse I is arranged between the output terminal of the switch and the output end of the primary coil.
As a further optimization of the technical scheme, the driver with the adjustable zero point type isolation transformer is characterized in that a double-contact switch is connected between a switch input terminal and a switch output terminal of the double-circuit interlocking contactor 1KM in series.
As a further optimization of the technical scheme, the power supply detection module comprises a voltage detection end FU and a reactive detection end TA, wherein the input end of the voltage detection end FU comprises three voltage detection ends FU, the three voltage detection ends FU are respectively connected with three power lines of three-phase alternating current, the reactive detection end TA comprises three reactive detection ends TA, the three reactive detection ends TA are respectively provided with induction coils, the three induction coils are respectively wrapped on the three power lines of the three-phase alternating current, and the output ends of the voltage detection ends FU and the reactive detection ends TA are respectively connected with the input end of the sampling module SIG-E.
As a further optimization of the technical scheme, the driver with the adjustable zero point type isolation transformer is characterized in that fuses II are arranged between three voltage detection ends FU and three power lines of three-phase alternating current.
As a further optimization of the technical scheme, the driver with the adjustable zero point type isolation transformer is characterized in that the output end of the sampling module SIG-E is connected with an LCD display module.
As a further optimization of the technical scheme, the invention relates to a driver with an adjustable zero point type isolation transformer, wherein a clock timing module is arranged in the main controller.
As a further optimization of the technical scheme, the invention provides the driver with the adjustable zero point type isolation transformer, the compensation module CR comprises a plurality of compensators, three groups of compensation capacitors are arranged in the compensators, each compensation capacitor is formed by connecting a plurality of capacitors in parallel, and the compensation capacitors are connected with resistors in parallel.
As a further optimization of the technical scheme, the driver with the adjustable zero point type isolation transformer is characterized in that the input ends of the three groups of compensation capacitors are connected with the compensation switch KM, the input end of the first group of compensation capacitors is connected with the output end of the third group of compensation capacitors, the output end of the first group of compensation capacitors is connected with the input end of the second group of compensation capacitors, and the output end of the second group of compensation capacitors is connected with the input end of the third group of compensation capacitors.
The invention discloses a driver with an adjustable zero point type isolation transformer, which has the following beneficial effects:
the driver with the adjustable zero point type isolation transformer is provided with the sampling module SIG-E, the power supply detection module and the compensation switch KM, so that the work of the compensation module CR can be accurately controlled according to the working state of a circuit device, and the problems of parallel resonance and harmonic amplification can be effectively avoided; three-phase voltage, current, active power, reactive power, apparent power, power factor, load property and frequency of the motor can be measured in real time through the sampling module SIG-E, the current motor load rate and four-quadrant display power are indicated through the LCD display module, and a person can be prompted to adjust the transformer to meet the use requirement of a circuit; the transformer is arranged, and the working state of the transformer is dynamically adjusted with load according to the power supply state and the load rate change of the motor, so that the circuit voltage is adjusted, the phenomena of insufficient torque and large-horse-drawn trolley are avoided, the power supply parameters of the motor tend to be in a state of dynamic balance with the load rate in real time, and the redundant torque of the motor is reduced; the fuse is arranged, so that the damage of the compensation switch KM or the compensation module CR caused by overload of the power supply voltage can be effectively prevented; when the motor is frequently started and stopped, the main controller interrupts the work of the compensation module CR through a timing function, so that the problems of overlarge compensation and overload motor voltage can be effectively prevented; the parameters of frequency, voltage, current, power factor, current/voltage unbalance degree, load property, voltage/current harmonic distortion rate, demand and phase sequence can be set to be out of limit, alarm prompt is carried out through the main controller, and the occurrence time of alarm events and the running time of the motor are recorded; and the isolation transformer Tb can automatically realize the conversion of the working state according to the change of the load rate, so that the driver has good safety and economy under wider load rate.
Drawings
The invention will be described in further detail with reference to the accompanying drawings and detailed description.
FIG. 1 is a schematic diagram of the hardware architecture of the present invention;
FIG. 2 is an overall schematic of the circuit of the present invention;
FIG. 3 is a schematic diagram of the wiring of the compensation module CR of the present invention;
fig. 4 is a schematic diagram of the wiring of an isolation transformer Tb of the present invention;
FIG. 5 is a schematic diagram of the wiring of the sampling module SIG-E of the present invention;
FIG. 6 is a pin schematic diagram of a host controller of the present invention;
FIG. 7 is a schematic diagram of a portion of a communication module between a host controller and a sampling module SIG-E in accordance with the present invention;
FIG. 8 is a schematic diagram of a portion of a communication module between a host controller and a sampling module SIG-E in accordance with the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
The first embodiment is as follows:
the following description of the present embodiment is merely illustrative, and in no way serves as any limitation to the invention, its application or use, and should be noted in connection with fig. 1-7: like reference numerals and letters refer to like items in the following figures.
The utility model provides a driver with adjustable zero point type isolation transformer, includes sampling module SIG-E, main power supply input La, steady voltage module Ta, isolation transformer Tb, power detection module, benchmark earthing terminal N, main control unit, compensation switch KM, compensation module CR and main power supply output Lb, main power supply input La includes La1, la2 and La3 terminal of the three-phase line of connecting three-phase alternating current respectively, steady voltage module Ta passes through alternating current to direct current rectification and step down as system weak current power supply to steady voltage module Ta can adopt the battery of handling and corresponding steady voltage device, and steady voltage module Ta's power output connects sampling module SIG-E's power input, benchmark earthing terminal N and power detection module's output are connected with sampling module SIG-E's input respectively, isolation transformer Tb is adjustable zero point type isolation transformer Tb, isolation transformer Tb sets up between power detection module and compensation switch KM, isolation transformer Tb's control switch is positive 822 switch, and isolation transformer Tb's control switch's control end is the voltage transformation device, and the voltage transformation device can be connected as the input of the main control transformer of system weak current power supply to the input voltage of switching device, can be satisfied at the same time with the input of main control module SIG-E, can be solved the input condition of phase change over voltage to the main control transformer, can be connected with the input voltage of main control device, can's input voltage of the main control signal to the motor, can be solved simultaneously, the input condition is realized to the phase change over the phase voltage of voltage transformation device. The reference grounding end N is used as a reference voltage for measuring voltage and detecting an alternating current sinusoidal frequency spectrum, the main power supply input end La is communicated with the main power supply output end Lb, the main power supply output end Lb comprises Lb1, lb2 and Lb3, the output end of the sampling module SIG-E is connected with a main controller, the output end of the main controller is connected with the control end of the compensation switch KM, the compensation switch KM is a well-established CK3 series contactor, the compensation switch KM comprises 2KM, 3KM and 4KM which are connected in parallel, the sampling module SIG-E calculates a voltage value, reactive power and a line power factor according to input data of the power supply detection module, and is used as a basis for controlling the compensation switch KM and a basis for controlling a transformation value of the isolation transformer Tb, one end of the compensation switch KM is connected between the power supply detection module and the main power supply output end Lb, and the other end of the compensation switch KM is connected with the compensation module CR; when the input voltage of the power supply is lower, in order to ensure the normal operation of the electric motor, the main controller controls the compensation switch KM to be opened to prevent a series of problems of capacitor self-healing enhancement, capacity loss acceleration, capacitor early failure and the like caused by a plurality of compensation degrees, and can control the isolation transformer Tb to boost so as to prevent insufficient torque of the motor caused by the fact that the compensation module CR is connected when the voltage is lower; when the main controller calculates that the system voltage is stable and enough for the motor to run and the reactive power of the motor to increase, the main controller controls the compensation switch KM to be switched on, the compensation module CR is connected to the circuit, and part of reactive power consumed by the inductive reactance can be supplied, so that the load current of the distribution transformer and the distribution line can be reduced; the cross-sectional area of the wires of the distribution line can be reduced, the capacity of an enterprise distribution transformer is reduced, and the active loss of an enterprise distribution transformer and distribution network is reduced; because the device is arranged at the distribution line terminal, the power transmission loss can be reduced in a mode of reducing the current of the whole power supply line, and the device has maximized reactive economic equivalent; meanwhile, under the action of the compensation module CR, the starting current of the motor can be reduced, the starting loss of the motor is reduced, and the service life of the motor is prolonged; the model of a controller chip adopted by the main controller is STM32F103C8T6, the model of the sampling module SIG-E is Acuvim II type three-phase power detection equipment, and the Acuvim II series multifunctional network power instrument is designed by adopting the most modern microprocessor and digital signal processing technology. The comprehensive three-phase electric quantity measurement/display, energy accumulation, electric power quality analysis, fault alarm, trend recording, electric energy quality event recording, waveform recording, time-sharing metering and network communication are integrated. The large-screen and high-definition liquid crystal display fully meets the vision requirement of the user, and the elegant and bright backlight display enables the user to easily look up the measurement data under weak light; the Acuvim II series products can be used as meters independently to replace a large number of traditional analog meters, and can also be used as front-end elements of an electric power monitoring system to realize remote data acquisition and control; the Acuvim II series instrument introduces digital signal processing technology, so that on-line power quality analysis is possible. The total harmonic distortion rate of the voltages and the currents of each phase, the voltage crest coefficient, the current coefficient, each subharmonic component and the unbalance degree of the voltages and the currents can be measured in real time; communication between the main controller and the sampling module SIG-E is realized through an RS-485 communication interface built in an Acuvim II series multifunctional network electric power instrument.
The isolating transformer Tb comprises a transformer coil group, a double-way interlocking contactor 1KM and an isolating component, wherein the transformer coil group comprises three primary coils and three secondary coils which are respectively arranged opposite to the three primary coils, input ends Ua1, ub1 and Uc1 of the three primary coils are respectively connected with La1, la2 and La3 on a main power supply input end La, output ends Ua2, ub2 and Uc2 of the three primary coils are respectively connected with Lb1, lb2 and Lb3 on a main power supply output end Lb, one ends Ua4, ub4 and Uc4 of the three secondary coils are respectively connected with a reference grounding end N, the other ends Ua3, ub3 and Uc3 of the three secondary coils are connected between the double-way interlocking contactor 1KM and the isolating component, the double-way interlocking contactor 1KM is provided with three, 1KM1, 1KM2 and 1KM3 in the drawings respectively, wherein the two-way interlocking contactor 1KM comprises two switch input terminals and two switch output terminals, the two switch input terminals are connected with one end, which is not connected with a reference grounding end N, of one secondary coil, such as Ua3 or Ub3 or Uc3 in the drawings, the two switch output terminals are respectively connected with the output end of one primary coil and the reference grounding end N, the two switch input terminals are connected with the input end of an isolation assembly, the two-way interlocking contactor 1KM and the isolation assembly are respectively provided with three, the output ends of the three isolation assemblies are connected with the reference grounding end N, and the isolation assembly consists of a plurality of parallel capacitor devices and isolation resistors connected with the capacitor devices in parallel; as shown in fig. 4, the types of 1KM1, 1KM2 and 1KM3 are all familiar CK3 series contactors, the signal output end of the main controller is connected with the control signal input ends of 1KM1, 1KM2 and 1KM3, when 1KM1 is on, ua3, ra2, ra1 and Lb1 form a passage i, ua3, the isolation component and the reference ground terminal N form a passage ii, ua3, ra4, ra3 and the reference ground terminal N form a passage iii, and when 1KM2 and 1KM3 are on, the same is true; the secondary coil voltage at the ua3 position is taken as a compensation voltage by the channel I to compensate Lb1 on the output end Lb of the main power supply; the channel II plays roles in stabilizing voltage, filtering and compensating capacitance through the action of the isolation component, and under the synergistic effect of the channel I and the channel II, the problems that the traditional transformer is started for achieving full torque of the motor, the starting voltage is too high, the electric quantity loss is large, the voltage fluctuation is unstable and the like can be solved; the passage III is used for consuming the electric energy in the isolation assembly, so that the capacitor can be discharged rapidly; when the load rate of the isolation transformer Tb is higher, for example, when the load rate is higher than 80%, and the energy conservation requirement is not met, the zero point of the isolation transformer Tb is short-circuited, and the isolation transformer Tb is equivalent to a reactor added in a circuit to play a role in choke, has no transformer function and is used for full-voltage power supply; when the load rate meets the changing condition, for example, the load rate is 60%, the zero point of the isolation transformer Tb is open, and the isolation transformer Tb works, so that the input power of the motor is reduced, the loss is reduced, and the economic benefit is improved; through the use of the isolation transformer Tb, the driver has good safety and economy under a wider load rate.
A fuse I is arranged between the switch output terminal Ra1 and the output end ua2 of the primary coil, a fuse I is arranged between the switch output terminal Rb1 and the output end ub2 of the primary coil, and a fuse I is arranged between the switch output terminal Rc1 and the output end uc2 of the primary coil, so that circuit protection is performed.
The switch input terminal and the switch output terminal of the double-way interlocking contactor are both double-contact switches connected in series, and voltage is divided in a mode of additionally arranging switch contacts, so that electric shock damage of the switch is avoided, and the service life of the double-way interlocking contactor is prolonged.
The power supply detection module comprises a voltage detection end FU and a reactive detection end TA, the input end of the voltage detection end FU comprises three voltage detection ends FU1, FU2 and FU3, the three voltage detection ends FU1, FU2 and FU3 are respectively connected with three power transmission lines of three-phase alternating current, the reactive detection end TA comprises three reactive detection ends TAa, TAb and TAc, inductance coils are respectively arranged on the three reactive detection ends TAa, TAb and TAc, the three inductance coils are respectively wrapped on the three power transmission lines of the three-phase alternating current, the three reactive detection ends TAa, TAb and TAc generate corresponding induced electromotive force in the alternating current electrifying process to be used as sinusoidal spectrum signals of the alternating current, the output ends of the voltage detection ends FU and the reactive detection ends TA are respectively connected with the input ends of the sampling module SIG-E, and the main controller calculates power factors of the circuit through the signals to be used as control basis for controlling whether the compensation switch KM is switched on.
And fuses II are arranged between the three voltage detection terminals FU and the three power lines of the three-phase alternating current so as to protect the sampling module SIG-E and the voltage detection terminals FU and prevent the circuit devices from being burnt out by overcurrent.
The output end of the sampling module SIG-E is connected with an LCD display module, and the sampling module SIG-E transmits the calculated voltage value, the power factor, the useful work and the idle work value to the LCD display module for display, so that equipment maintenance personnel can conveniently check and know the working state of the system in real time; meanwhile, the LCD display module can be used for displaying the voltage value and the transformation value of the isolation transformer Tb, and the LCD display module can prompt personnel to manually adjust the isolation transformer Tb so as to meet the use requirement of a circuit.
When the motor is switched on or off quickly, the motor still operates at high rotation speed due to inertia after the power is cut off, and the compensating capacitor becomes motor magnetic current through discharging, so that the motor works in a power generation state. In order to avoid the problems, a clock timing module is arranged in the main controller, the main controller records the starting time and the stopping time of the motor, the clock timing module is used for accumulating the time, a time threshold Tmin is added in a control program of the main controller, and if the difference between the secondary starting time of the motor and the previous stopping time of the motor is smaller than the time threshold Tmin, a disconnection compensation switch KM is controlled, and the starting compensation module CR does not participate in the work; if the difference between the second starting time of the motor and the previous stopping time of the motor is greater than the time threshold Tmin, the compensation switch KM is controlled to be turned on, so that the compensation module CR works normally; the time threshold Tmin should be sufficient to compensate for the complete consumption of the capacitance in module CR by the internal resistor of module CR.
The compensation module CR comprises a plurality of compensators, three groups of compensation capacitors are arranged in the compensators, each compensation capacitor is formed by connecting a plurality of capacitors in parallel, and resistors are connected to the compensation capacitors in parallel; when the reactive power in the circuit increases, the compensation module CR starts to work, a plurality of capacitors are continuously charged and discharged, and most of reactive current required by the motor is supplied by the plurality of capacitors, so that the power factor of the whole power supply line can be improved, and the resistors connected in parallel on the compensation capacitors are used for stopping the motor to consume the electric energy stored in the capacitors, so that the voltage overload of the motor caused by superposition of two voltages in the next power-on process is prevented.
The input ends of the three groups of compensation capacitors are connected with the compensation switch KM, the input end of the first group of compensation capacitors is connected with the output end of the third group of compensation capacitors, the output end of the first group of compensation capacitors is connected with the input end of the second group of compensation capacitors, and the output end of the second group of compensation capacitors is connected with the input end of the third group of compensation capacitors, so that the charge and discharge efficiency of each capacitor can be improved, and electric energy stored in the capacitors can be consumed rapidly when the machine is stopped.
The invention relates to a driver with an autotransformer, which has the following working principle: when 1KM1 of the two-way interlock contactor 1KM is on, ua3, ra2, ra1 and Lb1 of the transformer coil form a path i, ua3, the isolation assembly and the reference ground N form a path ii, ua3, ra4, ra3 and the reference ground N of the transformer coil form a path iii, and 1KM2 and 1KM3 are on in the same manner; the secondary coil voltage at the ua3 position is taken as a compensation voltage by the channel I to compensate Lb1 on the output end Lb of the main power supply; the channel II plays roles in stabilizing voltage, filtering and compensating capacitance through the action of the isolation component, and under the synergistic effect of the channel I and the channel II, the problems that the traditional transformer is started for achieving full torque of the motor, the starting voltage is too high, the electric quantity loss is large, the voltage fluctuation is unstable and the like can be solved; the passage III is used for consuming the electric energy in the isolation assembly, so that the capacitor can be discharged rapidly;
the device is arranged at the inlet end of the electric motor, when the input voltage of a power supply is lower, the main controller controls the compensation switch KM to be disconnected so as to prevent a series of problems of self-healing enhancement of a capacitor, accelerating capacity loss, early failure of the capacitor and the like caused by multiple compensation, and can control the isolation transformer Tb to boost so as to prevent insufficient torque of the motor caused by the fact that the power supply is connected into the compensation module CR when the voltage is lower; when the main controller calculates that the system voltage is stable and enough for the motor to run and the reactive power of the motor to increase, the main controller controls the compensation switch KM to be switched on, the compensation module CR is connected to the circuit, and part of reactive power consumed by the inductive reactance can be supplied, so that the load current of the distribution transformer and the distribution line can be reduced; the cross-sectional area of the wires of the distribution line can be reduced, the capacity of an enterprise distribution transformer is reduced, and the active loss of an enterprise distribution transformer and distribution network is reduced; because the device is arranged at the distribution line terminal, the power transmission loss can be reduced in a mode of reducing the current of the whole power supply line, and the device has maximized reactive economic equivalent; meanwhile, under the action of the compensation module CR, the starting current of the motor can be reduced, the starting loss of the motor is reduced, and the service life of the motor is prolonged; when the motor is switched on or off quickly, the motor still operates at high rotation speed due to inertia after the power is cut off, and the compensating capacitor becomes motor magnetic current through discharging, so that the motor works in a power generation state. In order to avoid the problems, a clock timing module is arranged in the main controller, the main controller records the starting time and the stopping time of the motor, the clock timing module is used for accumulating the time, a time threshold Tmin is added in a control program of the main controller, and if the difference between the secondary starting time of the motor and the previous stopping time of the motor is smaller than the time threshold Tmin, a disconnection compensation switch KM is controlled, and the starting compensation module CR does not participate in the work; if the difference between the second starting time of the motor and the previous stopping time of the motor is greater than the time threshold Tmin, the compensation switch KM is controlled to be turned on, so that the compensation module CR works normally; the time threshold Tmin should be sufficient for the internal resistor of the compensation module CR to completely consume the capacity of the compensation module CR;
the output end of the sampling module SIG-E is connected with an LCD display module, and the sampling module SIG-E transmits the calculated voltage value, the power factor, the useful work and the idle work value to the LCD display module for display, so that equipment maintenance personnel can conveniently check and know the working state of the system in real time; meanwhile, the LCD display module can be used for displaying the voltage value and the transformation value of the isolation transformer Tb, and the LCD display module can prompt personnel to manually adjust the isolation transformer Tb so as to meet the use requirement of a circuit;
the isolation transformer Tb is arranged between the power supply detection module and the compensation switch KM; therefore, the compensation module CR is ensured to work in a voltage range meeting the requirement, and the damage of the compensation module CR or the motor caused by insufficient motor torque or excessive voltage due to the too low voltage is avoided;
the control signal input end of the isolation transformer Tb is connected with the signal output end of the main controller, the main controller automatically controls the operation of the isolation transformer Tb through the input voltage value, so that the motor torque deficiency caused by the too low voltage can be avoided, the motor torque can be controlled in real time through voltage transformation according to the requirement, and the practicability and the reliability of the device are improved;
compared with a common transformer, the isolation transformer Tb has the advantages of eliminating impulse voltage, being beneficial to quick discharging under the condition of voltage reduction, being more suitable for each working condition of a motor, and being capable of solving the problem that full torque starting of the motor can not be realized when power compensation equipment works.
Of course, the above description is not intended to limit the invention, but rather the invention is not limited to the above examples, and variations, modifications, additions or substitutions within the spirit and scope of the invention will be within the scope of the invention.
Claims (8)
1. The utility model provides a driver with adjustable zero point type isolation transformer, includes sampling module SIG-E, main power input La, voltage stabilizing module Ta, isolation transformer Tb, power detection module, benchmark earthing terminal N, main control unit, compensation switch KM, compensation module CR and main power output Lb, its characterized in that: the power supply output end of the voltage stabilizing module Ta is connected with the power supply input end of the sampling module SIG-E, the reference grounding end N and the output end of the power supply detection module are respectively connected with the input end of the sampling module SIG-E, an isolation transformer Tb is arranged between the main power supply input end La and the main power supply output end Lb, the output end of the sampling module SIG-E is connected with a main controller, the output end of the main controller is connected with the control end of the compensation switch KM, one end of the compensation switch KM is connected between the power supply detection module and the main power supply output end Lb, the other end of the compensation switch KM is connected with the compensation module CR, the isolation transformer Tb is arranged between the power supply detection module and the compensation switch KM, the input end of the isolation transformer Tb is connected with the reference grounding end N, and the control signal input end of the isolation transformer Tb is connected with the signal output end of the main controller;
the isolation transformer Tb comprises a transformer coil group, a double-way interlocking contactor and an isolation assembly, wherein the transformer coil group comprises three primary coils and three secondary coils which are respectively arranged opposite to the three primary coils, the input ends of the three primary coils are connected with a main power input end La, the output ends of the three primary coils are connected with a main power output end Lb, one ends of the three secondary coils are connected with a reference grounding end N, the other ends of the three secondary coils are connected between the double-way interlocking contactor and the isolation assembly, the double-way interlocking contactor comprises two switch input terminals and two switch output terminals, the two switch input terminals are connected with one end of one secondary coil which is not connected with the reference grounding end N, the two switch output terminals are respectively connected with the output end of one primary coil and the reference grounding end N, the two switch input terminals are respectively connected with the input end of the isolation assembly, the double-way interlocking contactor and the isolation assembly are respectively provided with three, the output ends of the three isolation assembly are connected with the reference grounding end N, and the isolation assembly is composed of a plurality of capacitors and a plurality of parallel resistors;
the power supply detection module comprises a voltage detection end FU and a reactive detection end TA, the input end of the voltage detection end FU comprises three voltage detection ends FU, the three voltage detection ends FU are respectively connected with three power transmission lines of three-phase alternating current, the reactive detection end TA comprises three reactive detection ends TA, the three reactive detection ends TA are respectively provided with induction coils, the three induction coils are respectively wrapped on the three power transmission lines of the three-phase alternating current, and the output ends of the voltage detection ends FU and the reactive detection ends TA are respectively connected with the input end of the sampling module SIG-E.
2. A driver with an adjustable zero point isolation transformer according to claim 1, characterized in that: and a fuse I is arranged between the switch output terminal and the output end of the primary coil.
3. A driver with an adjustable zero point isolation transformer according to claim 2, characterized in that: and a double-contact switch is connected in series between the switch input terminal and the switch output terminal of the double-circuit interlocking contactor.
4. A driver with an adjustable zero point isolation transformer according to claim 3, characterized in that: and fuses II are arranged between the three voltage detection terminals FU and the three power transmission lines of the three-phase alternating current.
5. A driver with an adjustable zero point isolation transformer according to claim 1, characterized in that: the output end of the sampling module SIG-E is connected with an LCD display module.
6. A driver with an adjustable zero point isolation transformer according to claim 1, characterized in that: and a clock timing module is arranged in the main controller.
7. A driver with an adjustable zero point isolation transformer according to claim 1, characterized in that: the compensation module CR comprises a plurality of compensators, three groups of compensation capacitors are arranged in the compensators, each compensation capacitor is formed by connecting a plurality of capacitors in parallel, and resistors are connected to the compensation capacitors in parallel.
8. A driver with an adjustable zero point isolation transformer as claimed in claim 7, wherein: the input ends of the three groups of compensation capacitors are connected with the compensation switch KM, the input end of the first group of compensation capacitors is connected with the output end of the third group of compensation capacitors, the output end of the first group of compensation capacitors is connected with the input end of the second group of compensation capacitors, and the output end of the second group of compensation capacitors is connected with the input end of the third group of compensation capacitors.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711043713 | 2017-10-31 | ||
| CN2017110437136 | 2017-10-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107769664A CN107769664A (en) | 2018-03-06 |
| CN107769664B true CN107769664B (en) | 2023-12-22 |
Family
ID=61275883
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721663829.5U Active CN207442725U (en) | 2017-10-31 | 2017-12-04 | A kind of drive electric appliance with adjusting zero point type isolating transformer |
| CN201711260789.4A Active CN107769664B (en) | 2017-10-31 | 2017-12-04 | Driver with adjustable zero point type isolation transformer |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721663829.5U Active CN207442725U (en) | 2017-10-31 | 2017-12-04 | A kind of drive electric appliance with adjusting zero point type isolating transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN207442725U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10144541A (en) * | 1996-11-05 | 1998-05-29 | Soken Denki Kk | Burden device for instrument transformer |
| CN101127503A (en) * | 2007-07-09 | 2008-02-20 | 东北大学 | Micro fuel engine power generation excitation control and protection device and method based on DSP |
| CN201078842Y (en) * | 2006-05-08 | 2008-06-25 | 梁忠民 | Alternating current machine electricity economizer |
| CN101340096A (en) * | 2008-08-07 | 2009-01-07 | 上海交通大学 | Electric reactive compensating controller |
| CN102255603A (en) * | 2011-07-27 | 2011-11-23 | 广州智光电气股份有限公司 | Comprehensive control system and method based on high voltage motor control and reactive power compensation |
| CN103580055A (en) * | 2012-07-18 | 2014-02-12 | 上海寰晟新能源科技有限公司 | Open type grid-connection experiment system of variable-speed constant-frequency double-fed wind power generator unit and open type grid-connection experiment method |
| CN205039709U (en) * | 2015-07-28 | 2016-02-17 | 浙江弘乐电气有限公司 | Contactless compensation alternating current voltage stabilizer of three -phase |
| 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 |
-
2017
- 2017-12-04 CN CN201721663829.5U patent/CN207442725U/en active Active
- 2017-12-04 CN CN201711260789.4A patent/CN107769664B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10144541A (en) * | 1996-11-05 | 1998-05-29 | Soken Denki Kk | Burden device for instrument transformer |
| CN201078842Y (en) * | 2006-05-08 | 2008-06-25 | 梁忠民 | Alternating current machine electricity economizer |
| CN101127503A (en) * | 2007-07-09 | 2008-02-20 | 东北大学 | Micro fuel engine power generation excitation control and protection device and method based on DSP |
| CN101340096A (en) * | 2008-08-07 | 2009-01-07 | 上海交通大学 | Electric reactive compensating controller |
| CN102255603A (en) * | 2011-07-27 | 2011-11-23 | 广州智光电气股份有限公司 | Comprehensive control system and method based on high voltage motor control and reactive power compensation |
| CN103580055A (en) * | 2012-07-18 | 2014-02-12 | 上海寰晟新能源科技有限公司 | Open type grid-connection experiment system of variable-speed constant-frequency double-fed wind power generator unit and open type grid-connection experiment method |
| CN205039709U (en) * | 2015-07-28 | 2016-02-17 | 浙江弘乐电气有限公司 | Contactless compensation alternating current voltage stabilizer of three -phase |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107769664A (en) | 2018-03-06 |
| CN207442725U (en) | 2018-06-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107834939B (en) | Intelligent load balancer | |
| WO2007033599A1 (en) | A customer intelligent reactive power automatic compensation energy-saved device | |
| WO2007016346A2 (en) | Ststem for managing electrical consumption | |
| CN205248805U (en) | Novel DVR voltage compensation device | |
| CN201146390Y (en) | Electromagnetic balance electricity economizer | |
| CN107769664B (en) | Driver with adjustable zero point type isolation transformer | |
| CN202004604U (en) | Multi-winding serial-connection variable-capacity induction motor and control device thereof | |
| CN206850446U (en) | A kind of intelligent load-balancing regulator | |
| CN207427023U (en) | A kind of electric terminal drive electric appliance | |
| CN109378887B (en) | Charging pile control system | |
| CN105356545B (en) | A kind of Electrical Safety acquisition module electric supply installation | |
| CN103178527B (en) | Voltage deviation adjustor | |
| CN204668960U (en) | A kind of intelligent modularized three-phase imbalance dynamic reactive compensation device | |
| CN202159979U (en) | Intelligent reactive power adjustment and compensation device | |
| CN204405813U (en) | Be applicable to load testing and the energy-recuperation system of the detection of DC energy storage medium charge-discharge characteristic | |
| CN110535139B (en) | Broad width pressure regulating device | |
| CN107579593A (en) | A kind of energy supplying system of high voltage DC breaker | |
| CN207652063U (en) | A kind of elevator energy recovery system based on intelligent super capacitor module | |
| CN108471117A (en) | A kind of device improving electricity system efficiency | |
| US20150256090A1 (en) | Systems for reducing electrical consumption using triple core iterative transformers | |
| CN109546684B (en) | Micro-grid power supply system | |
| CN203504192U (en) | High-voltage step voltage and capacitance regulating reactive compensation complete equipment | |
| CN106849105A (en) | Low-voltage distributing line intelligent regulating device | |
| CN109327064B (en) | Charging pile group current distribution system | |
| CN202888851U (en) | Intelligent electrical load unbalance compensation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Room 25, 1st to 2nd floor, Building S1, surrounded by Xizhan Street, Hexie Avenue, Harbin Street, and Wuwei Road, Nangang District, Harbin City, Heilongjiang Province, 150001 Applicant after: Harbin jingduo Technology Co.,Ltd. Address before: No.118 xidazhi street, Nangang District, Harbin City, Heilongjiang Province Applicant before: HARBIN XINGYA TECHNOLOGY Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |