CN107544324A - Current transformer demarcation high-current generation device and its control method - Google Patents
Current transformer demarcation high-current generation device and its control method Download PDFInfo
- Publication number
- CN107544324A CN107544324A CN201710712259.2A CN201710712259A CN107544324A CN 107544324 A CN107544324 A CN 107544324A CN 201710712259 A CN201710712259 A CN 201710712259A CN 107544324 A CN107544324 A CN 107544324A
- Authority
- CN
- China
- Prior art keywords
- current
- contactor
- circuit
- transformer
- output end
- 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.)
- Granted
Links
Abstract
The invention discloses a kind of current transformer demarcation high-current generation device and its control method, including main A.C. contactor, strong current generator, rectification and filter circuit, positive A.C. contactor, negative sense A.C. contactor, sampling resistor, Centralized Controller；The present invention realizes continuously adjustabe of the electric current between 1200A and+1200A using Centralized Controller, the reference signal of 1200A ~+1200A direct current signals and precision current size is provided for current transformer demarcation, and then preferably solves the accurate computational problem of battery remaining power.
Description
Technical field
The present invention relates to a kind of current transformer demarcation high-current generation device and its control method, can be widely applied to
Electric automobile lithium battery and current transformer manufacturing field.
Background technology
With the requirement that economic development and people improve constantly to living environment, energy-saving and emission-reduction, which turn into industrial quarters, to be faced
The problem of.According to global carbon emission investigation statisticses, the carbon dioxide of motor vehicle exhaust emission is 24%, is only second to traditional energy processing
With the discharge capacity of recycling.And in automobile industry, the exhaust emissions of conventional fuel oil automobile is one of most important pollution sources.With
High pollution, the fuel-engined vehicle of high energy consumption are compared, and electric automobile relies on driven by power, and noise low-energy-efficiency is high, contamination-free discharge,
Energy-saving and environmental protection and cleaning etc. have obvious advantage, and therefore, the development of electric automobile receives much concern recently, its big rule
Mould application is considered as one of most effective mode alleviated energy scarcity and air environmental pollution and promote low-carbon economy to realize, with
It is the inexorable trend that the new-energy automobile of representative is future automobile industry development.
High-power power battery management system theory is studied many engineers and lacked experience at present, usually unilaterally will consumption
The administrative skill of " cell " in electronic product moves to " baby battery group " administrative skill in electric bicycle " big
In power power battery pack ".Over the past two years, increasing scholar and engineer paid close attention to some allusion quotations of high-power power battery group
Type problem, people more study using battery pack as an entirety, increasingly focus on inconsistency and its generation of battery
The reason for, and notice and add battery management difficulty because of the uneven of heating power field distribution in high power battery group.Pin
A series of professional technique is derived to " high-power power battery group ", such as：The Thermodynamics modeling and thermal management technology of battery pack,
High-voltage isulation self-diagnosis technology and pre-charge circuit technology etc..
Currently in automobile industry, Development of EV realizes the electrification of dynamical system, promotes the wound of orthodox car industry
Newly, make the transition, formd extensive common recognition in the world.Go deep into the technical research of electric automobile (EV), automobile becomes
" more and more electric ", along with commercialization and application, the increasingly increased fully loaded power system of militarization so that power train on automobile
The management of system is imperative, the accurate optimization control of dynamic prediction automotive interior power flow and energy stores subsystem, so as to carry
The research direction of power of vehicle and energy management is gone out.Battery management system by detect the voltage of battery, charging and discharging currents and
Battery pack temperature estimates the residual capacity of battery (SOC), and control battery charging and discharging is balanced, and carry out thermal control tubulation to battery pack
Manage and carry out CAN communication with vehicle-mounted monitoring system, charger, realize and coordinate control and optimize charging, ensure cell safety and prolong
Long battery life.In the numerous functions of battery management system, estimated with residual capacity, Balance route and thermal control management core the most
The heart.Residual capacity is to judge a series of basis of failures such as battery " overcharging " and " cross and put ", and its determination is battery management system
Emphasis.Simultaneously because residual capacity shows as the non-linear of height during battery use, it is accurate estimate residual capacity with
The accuracy of collection electric current has direct relation, is estimated due to residual capacity generally use Current integrating method, current integration
Accuracy and current detection accuracy it is closely related, the usual Current Transformer of current detecting come realize detection, therefore, for standard
Really estimation residual capacity, the current transformer precision of measurement battery charging and discharging electric current is high, and in charge-discharge battery management system
Whether the precision of the current transformer measurement electric current selected by middle Residual capacity prediction meets the requirement of measurement accuracy, existing market
Also no can provide can be adjustable with both forward and reverse directions, and the adjustable high precision variable current source of size of current, is current transformer
Measurement accuracy demarcation provides standard signal source, is that this present invention proposes current transformer demarcation high-current generation device and its control
Method processed, to provide important detection means from the current transformer for meeting battery management Residual capacity prediction required precision,
And then preferably solves the accurate computational problem of battery remaining power electric current.
At present, strong current generator can only produce unidirectional current, and precision is relatively low, can not be used as current transformer measurement essence
The standard signal source during rating test of degree, and electric automobile is just developing towards environmental protection and energy saving direction at present, some electric automobiles are
With energy recycle device, i.e., electric energy can be converted kinetic energy into automobile brake docking process, to battery when realizing braking
Charging, the flow direction of such electrokinetic cell electric current there is positive operating current flow direction and negative sense Brake energy recovery electric current stream
To, so, the estimation bidirectional current measurement for electrokinetic cell residual capacity is intended to that accurately, accurate residual capacity could be obtained
Value.
The content of the invention
To solve deficiency of the prior art, the present invention provide a kind of current transformer demarcation high-current generation device and
Its control method, -1200A~+1200A positive and negative direction direct current signals being provided for current sensor demarcation, accuracy is high, and then
Solves the accurate computational problem of battery remaining power electric current well.
In order to realize above-mentioned target, the present invention adopts the following technical scheme that：A kind of current transformer demarcation is sent out with high current
Generating apparatus, it is characterised in that including main A.C. contactor, strong current generator, rectification and filter circuit, positive ac contactor
Device, negative sense A.C. contactor, sampling resistor, Centralized Controller；The output end of the main A.C. contactor is sent out with the high current
The input connection of raw device；The output end of the strong current generator is connected with the input of the rectification and filter circuit；Institute
Input of the output end of rectification and filter circuit respectively with the positive A.C. contactor and negative sense A.C. contactor is stated to be connected；
The output end of the positive A.C. contactor and negative sense A.C. contactor is connected with the sampling resistor；The sampling resistor
Output end is connected with the input of the Centralized Controller；The output end of the Centralized Controller respectively with main A.C. contactor,
Strong current generator, positive A.C. contactor connect with the control terminal of negative sense A.C. contactor.
A kind of foregoing current transformer demarcation high-current generation device, it is characterized in that, the Centralized Controller includes
Voltage collection circuit, power supply, communication interface circuit, alarm, temperature sensor, microprocessor, touch-screen, main power source control are driven
Dynamic circuit, main power source control circuit, forward current control drive circuit, forward current control circuit, negative current control driving
Circuit, negative current control circuit, servomotor drive circuit；The input of the voltage collection circuit and sampling resistor it is defeated
Go out end connection；The output end of voltage collection circuit and the A/D ends of microprocessor connect；The I/O mouths of touch-screen and microprocessor connect
Connect；The power end of power output end and microprocessor connects；The communication interface end of communication interface circuit and microprocessor connects；Report
Alert device is connected with microprocessor I/O mouths；
The input of main power source control drive circuit, forward current control drive circuit and negative current control drive circuit
It is connected respectively with the I/O mouths of microprocessor；The input of the output end and main power source control circuit of main power source control drive circuit
Connection；The output end of main power source control circuit is connected with the control terminal of main A.C. contactor；Forward current control drive circuit
Output end is connected with the input of forward current control circuit, the output end of forward current control circuit and positive A.C. contactor
Control terminal connection；The output end of negative current control drive circuit is connected with the input of negative current control circuit, negative sense
The output end of current control circuit is connected with the control terminal of negative sense A.C. contactor；The output end and microprocessor of temperature sensor
A/D ends connect；The I/O mouths of the input of servomotor drive circuit and microprocessor connect, servomotor drive circuit it is defeated
Go out end to be connected with strong current generator, for driving the auto-transformer servomotor automatic voltage regulating circuit in strong current generator
Work.
A kind of foregoing current transformer demarcation high-current generation device, it is characterized in that：The strong current generator bag
Include auto-transformer servomotor automatic voltage regulating circuit, rising current transformer；Auto-transformer servomotor automatic voltage regulating circuit
Input is connected with the output end of main A.C. contactor, the output end and up-flow of auto-transformer servomotor automatic voltage regulating circuit
The input connection of transformer, the output end of rising current transformer are connected with rectification and filter circuit.
A kind of foregoing current transformer demarcation high-current generation device, it is characterized in that：The output line of rising current transformer
It is 10kW to enclose as 1 circle, rising current transformer power.
A kind of foregoing current transformer demarcation high-current generation device, it is characterized in that：The rectification and filter circuit
Including rectifier bridge and smoothing reactor, the input of smoothing reactor and the output end of rectifier bridge connect, for suppressing electric current
Fluctuation；The rectifier bridge using four rated current 2500A and the above Group of Silicon Controlled Rectifier into bridge rectifier electric current.
A kind of foregoing current transformer demarcation high-current generation device, it is characterized in that：The positive A.C. contactor
With negative sense A.C. contactor using rated current 2500A and the A.C. contactor of the above, and contacts of contactor contact resistance is small
In 1m Ω.
A kind of foregoing current transformer demarcation high-current generation device, it is characterized in that：The sampling resistor is resistance
For 40 μ Ω precision resistance, connection sampling resistor, the output loop resistance of tested current transformer be limited in 2.5m Ω and with
Under, maximum output AC current values reach 2000A.
A kind of foregoing current transformer demarcation high-current generation device, it is characterized in that：The touch-screen is used to set
And the current value and the sense of current that are manually set are shown, when electric current transfinites alarm circuit alarm, prompt input current value wrong；
The temperature value that the touch-screen measures for displays temperature sensor simultaneously, when temperature over-range alarm circuit alarm.
High-current generation device control method is used in a kind of current transformer demarcation, it is characterized in that：
Tested current transformer is concatenated into sampling resistor loop during use；
When manually setting current transformer demarcation current value and the sense of current, step includes：
1) a certain current value and the sense of current are set by touch-screen, current value setting range is -1200A~1200A；When
When the current value of setting transfinites, warning circuit alarm；Test job starts, and presses the main A.C. contactor of touch-screen switch key control
Connect；
2) microprocessor controls self coupling to become according to the current value and the sense of current of setting using servomotor drive circuit
The output voltage size of depressor servomotor automatic voltage regulating circuit, so as to adjust the AC current values of rising current transformer output, hand over
Stream electric current is changed into DC current through over commutation and filter circuit, and DC current is by the control output of positively or negatively A.C. contactor
Positively or negatively DC current, positively or negatively DC current flow through sampling resistor and tested current transformer, work as DC current
When flowing through sampling resistor, d. c. voltage signal is formed at sampling resistor both ends, sampling resistor both end voltage signal is as feedback letter
Number it is sent to the voltage collection circuit of Centralized Controller；
3) microprocessor judges the DC current size of sampling resistor after collecting voltage, if being higher or lower than setting electric current
Value, Centralized Controller control the output voltage size of auto-transformer servomotor automatic voltage regulating circuit, adjust rising current transformer
The AC current values size of output, until output DC current size meets setting value and setting electric current accuracy rating；If control
Producing forward current, then microprocessor controls positive A.C. contactor to connect by forward current control circuit, while passes through negative sense
Current control circuit control negative sense A.C. contactor disconnects, then flows through positive electricity in sampling resistor and tested current transformer loop
Stream；Microprocessor controls positive A.C. contactor to disconnect by forward current control circuit if control produces negative current, together
When by negative current control circuit control negative sense A.C. contactor to connect, then in sampling resistor and tested current transformer loop
Flow through negative current；
It is operated when automatically controlling according to the flow of predetermined set in the microprocessor, step includes：
First, connect positive A.C. contactor and produce positive direction electric current, electric current is progressively increased to by 0 according to time interval
1200A, then, 0 is automatically reduced to according to time interval, then J1 is closed into connection negative sense A.C. contactor and is switched to opposite direction electricity
Stream, electric current taper to 1200A according to time interval by 0, finally, 0 are changed to according to time interval, wherein, curent change
The value that time interval is arbitrarily set between 1-100S, current transformer so can be detected just by curent change repeatedly
The measurement accuracy of each point of reverse whole process compares, and examines the measurement accuracy of current transformer；
Cut off main A.C. contactor, you can close high-current generation device.
A kind of control method of foregoing current transformer demarcation high-current generation device, it is characterized in that：The electric current
Accuracy rating is 0.1 ‰.
The beneficial effect that the present invention is reached：
(1) continuously adjustabe of the electric current between -1200A and+1200A is realized using Centralized Controller；
(2) -1200A~+1200A direct current signals are provided for current sensor demarcation and accuracy has reached 0.1 ‰；
(3) the equal cut-in temperature sensor of major loop tie point, monitors tie point Contact Temperature, and system is safer.
Brief description of the drawings
Fig. 1 is current transformer demarcation high-current generation device principle assumption diagram；
Fig. 2 is Centralized Controller principle assumption diagram；
Fig. 3 is strong current generator principle assumption diagram；
Fig. 4 auto-transformer servomotor automatic voltage regulating circuit principle assumption diagrams.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following examples are only used for clearly illustrating the present invention
Technical scheme, and can not be limited the scope of the invention with this.
As shown in Figure 1, a kind of current transformer demarcation high-current generation device, including main A.C. contactor, big electricity
Flow-generator, rectification and filter circuit, positive A.C. contactor J1, negative sense A.C. contactor J2, sampling resistor, centralized Control
Device；The output end of main A.C. contactor and the input of strong current generator connect；The output end of strong current generator and rectification
And the input connection of filter circuit；The output end of rectification and filter circuit exchanges with positive A.C. contactor J1 and negative sense respectively
Contactor J2 input connection；Positive A.C. contactor J1 and negative sense A.C. contactor J2 output end connects with sampling resistor
Connect；The output end of sampling resistor and the input of Centralized Controller connect；The output end of Centralized Controller connects with main exchange respectively
Tentaculum, strong current generator, positive A.C. contactor J1 connect with negative sense A.C. contactor J2 control terminal.
As shown in Figure 2, Centralized Controller includes voltage collection circuit, power supply, communication interface circuit, alarm, temperature
Sensor, microprocessor, touch-screen, main power source control drive circuit, main power source control circuit, forward current control driving electricity
Road, forward current control circuit, negative current control drive circuit, negative current control circuit, servomotor drive circuit；
Microprocessor uses STM32 single-chip microcomputers.
The input of voltage collection circuit and the output end of sampling resistor connect；The output end and Wei Chu of voltage collection circuit
Manage the A/D ends connection of device；
The I/O mouths of touch-screen and microprocessor connect；
The power end of power output end and microprocessor connects, for providing power supply for microprocessor；
The communication interface end of communication interface circuit and microprocessor connects, and communication interface circuit uses RS485 communication modules,
Communicated for Centralized Controller with centralized-control center computer, centralized-control center computer is used for remote control Current Mutual Inductance
Device demarcation high-current generation device.
Alarm is connected with microprocessor I/O mouths, for when temperature or the current value being manually set transfinite, alarm；
The input of main power source control drive circuit, forward current control drive circuit and negative current control drive circuit
It is connected respectively with the I/O mouths of microprocessor；The input of the output end and main power source control circuit of main power source control drive circuit
Connection；The output end of main power source control circuit is connected with the control terminal of main A.C. contactor, and main power source control circuit is used to control
Main A.C. contactor cut-offs, including triode, current-limiting resistance, diode and 12V auxiliary reclays, the base stage and limit of triode
Leakage resistance concatenation is followed by microprocessor I/O mouths, and with connecing power supply, colelctor electrode connects 12V auxiliary reclays to the emitter stage of triode
Coil is followed by positive source, and diode reverse is connected in parallel on 12V auxiliary reclay coils both ends.
The output end of forward current control drive circuit is connected with the input of forward current control circuit, forward current control
The output end of circuit processed is connected with positive A.C. contactor J1 control terminal, and forward current control circuit is used to control positive exchange
Contactor cut-offs, including triode, current-limiting resistance, diode and 12V auxiliary reclays, base stage and the current-limiting resistance string of triode
Connecing and be followed by microprocessor I/O mouths, with connecing power supply, colelctor electrode connects 12V auxiliary reclay coils and is followed by positive source emitter stage,
Diode reverse is connected in parallel on 12V auxiliary reclay coils both ends.
The output end of negative current control drive circuit is connected with the input of negative current control circuit, negative current control
The output end of circuit processed is connected with negative sense A.C. contactor J2 control terminal, and negative current control circuit is used to control negative sense to exchange
Contactor cut-offs, including triode, current-limiting resistance, diode and 12V auxiliary reclays, base stage and the current-limiting resistance string of triode
Connecing and be followed by microprocessor I/O mouths, with connecing power supply, colelctor electrode connects 12V auxiliary reclay coils and is followed by positive source emitter stage,
Diode reverse is connected in parallel on 12V auxiliary reclay coils both ends.
The output end of temperature sensor is connected with microprocessor A/D ends, for measuring rectifier bridge electric current input and output four
Tie point joint temperature, prevent joint connection loosens from producing larger contact resistance, tie point is blown in heating.Major loop tie point
Equal cut-in temperature sensor, monitors tie point Contact Temperature, and system is safer.
The input of servomotor drive circuit and the I/O mouths of microprocessor connect, the output of servomotor drive circuit
End is connected with strong current generator, for driving the auto-transformer servomotor automatic voltage regulating circuit work in strong current generator
Make.
As shown in Figure 3, strong current generator includes auto-transformer servomotor automatic voltage regulating circuit, up-flow transformation
Device；The input of auto-transformer servomotor automatic voltage regulating circuit is connected with the output end of main A.C. contactor, self coupling transformation
The input of the output end of device servomotor automatic voltage regulating circuit and rising current transformer connects, the output end of rising current transformer with it is whole
Stream bridging connects；The output end of servomotor drive circuit is connected with the control terminal of auto-transformer servomotor.
As shown in figure 4, auto-transformer servomotor automatic voltage regulating circuit includes the servomotor controller being sequentially connected
1st, servomotor 2, gear 3, rack 4, sliding block 5, sliding pin 6, auto-transformer 7；The output end of servomotor controller 2 and servo electricity
The power end of machine 1 is connected, and gear 3 is arranged on the output shaft of servomotor 1, and gear 3 rolls on rack 4, and sliding block 5 is fixed on rack
On 4, sliding pin 6 is fixed on sliding block 5, and sliding pin 6 is conductive metal material, and sliding block 5 is non-conductive nonmetallic materials, gear 3
Also band movable slider 5 moves up and down together with rack 4 while band carry-over bar 4 moves up and down, and sliding pin 6 exports in auto-transformer 7
Slided on end-coil, change the output end tap position of auto-transformer 7, realize the regulation of output voltage, servomotor angle of rotation
Degree 7 corresponding tap position of corresponding auto-transformer；Auto-transformer output electricity can be realized by combining sliding pin by servomotor
The continuously adjustabe of pressure and controllable, high current required for could so being realized by Centralized Controller automatically adjusting.
Rising current transformer is used to produce 0-2000A alternating currents.
The output winding of rising current transformer is 1 circle, and rising current transformer power is 10kW, will be by when current transformer is demarcated
Survey current transformer to be connected in series in a loop with sampling resistor, the loop resistance of sampling resistor and tested current transformer
2.5m Ω and following are limited in, maximum output AC current values are up to 2000A.
Rectification and filter circuit include rectifier bridge and smoothing reactor, the output of the input and rectifier bridge of smoothing reactor
End connection, for suppressing the fluctuation of electric current.
Rectifier bridge using 4 rated current 2500A and the above Group of Silicon Controlled Rectifier into bridge rectifier electric current.
Positive A.C. contactor J1 and negative sense A.C. contactor J2 is using rated current 2500A and the ac contactor of the above
Device, and contact resistance is less than 1m Ω.
Sampling resistor is the precision resistance that resistance is 40 μ Ω.
It can be set on touch-screen and show the current value (such as setting 100A, just show 100A at once) and electricity being manually set
Flow direction (positive direction or opposite direction), when electric current transfinites alarm circuit alarm, prompt input current value wrong；
Touch-screen also can the temperature value that measures of displays temperature sensor, when temperature over-range alarm circuit alarm；
During current transformer rating test, tested current transformer is concatenated in the loop together with sampling resistor, is used for
Whether the normalized current set with high-current generation device is consistent the electric current of the tested current transformer of detection, current value precision
Error is 0.1 ‰.
As shown in figure 4, current transformer demarcation is with the control method of high-current generation device：
When manually setting current transformer demarcation current value and the sense of current,
1) a certain current value and the sense of current (positive direction or opposite direction), current value setting range are set by touch-screen
For -1200A~1200A；When the current value of setting transfinites, warning circuit alarm；Test job starts to press touch-screen switch
The main A.C. contactor of key control is connected；
2) microprocessor controls self coupling to become according to the current value and the sense of current of setting using servomotor drive circuit
The output voltage size of depressor servomotor automatic voltage regulating circuit, so as to adjust the AC current values of rising current transformer output, hand over
Stream electric current is changed into DC current through over commutation and filter circuit, and DC current is by the control output of positively or negatively A.C. contactor
Positively or negatively DC current, positively or negatively DC current flow through sampling resistor and tested current transformer, work as DC current
When flowing through sampling resistor, d. c. voltage signal is formed at sampling resistor both ends, sampling resistor both end voltage signal is as feedback letter
Number it is sent to the voltage collection circuit of Centralized Controller；
3) microprocessor judges the DC current size of sampling resistor after collecting voltage, if being higher or lower than setting electric current
Value, Centralized Controller control the output voltage size of auto-transformer servomotor automatic voltage regulating circuit, adjust rising current transformer
The AC current values size of output, until output DC current size meets setting value and setting accuracy scope (0.1 ‰)；If control
System produces forward current, and then microprocessor controls positive A.C. contactor J1 to connect by forward current control circuit, passes through simultaneously
Negative current control circuit control negative sense A.C. contactor J1 disconnects, then is flowed through in sampling resistor and tested current transformer loop
Forward current；Microprocessor controls positive A.C. contactor J1 by forward current control circuit if control produces negative current
Disconnect, while control negative sense A.C. contactor J2 to connect by negative current control circuit, then in sampling resistor and tested electric current
Transformer circuit flows through negative current.
It is operated when automatically controlling according to the flow of predetermined set in the microprocessor：
First, connect J1 and produce positive direction electric current, electric current progressively increases to 1200A according to time interval by 0, then, pressed
Be automatically reduced to 0 according to time interval, then J1 closed and connects J2 and is switched to opposite direction electric current, electric current by 0 according to time interval by
1200A is gradually changed to, finally, 0 is changed to according to time interval, wherein, curent change time interval is any between 1-100S
The value of setting, measurement of the current transformer in each point of forward and reverse whole process so can be detected by curent change repeatedly
Ratio of precision pair, examine the measurement accuracy of current transformer.
Cut off main A.C. contactor, you can close high-current generation device.
The present invention realizes continuously adjustabe of the electric current between -1200A and+1200A using Centralized Controller；For current sense
The reference signal of device demarcation offer -1200A~+1200A direct current signals and precision current size；All tie points of major loop connect
Enter temperature sensor, monitor tie point Contact Temperature, system is safer.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvement and deformation can also be made, these are improved and deformation
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of current transformer demarcation high-current generation device, it is characterised in that sent out including main A.C. contactor, high current
Raw device, rectification and filter circuit, positive A.C. contactor, negative sense A.C. contactor, sampling resistor, Centralized Controller；The master
The output end of A.C. contactor is connected with the input of the strong current generator；The output end of the strong current generator and institute
State rectification and the input connection of filter circuit；The output end of the rectification and filter circuit respectively with the positive ac contactor
Device connects with the input of negative sense A.C. contactor；The output end of the positive A.C. contactor and negative sense A.C. contactor with
The sampling resistor connection；The output end of the sampling resistor is connected with the input of the Centralized Controller；It is described to concentrate control
The output end of device processed respectively with main A.C. contactor, strong current generator, positive A.C. contactor and negative sense A.C. contactor
Control terminal connects.
2. a kind of current transformer demarcation high-current generation device according to claim 1, it is characterized in that, the concentration
Controller includes voltage collection circuit, power supply, communication interface circuit, alarm, temperature sensor, microprocessor, touch-screen, master
Power supply drive circuit, main power source control circuit, forward current control drive circuit, forward current control circuit, negative sense electricity
Flow control drive circuit, negative current control circuit, servomotor drive circuit；The input of the voltage collection circuit is with adopting
The output end connection of sample resistance；The output end of voltage collection circuit and the A/D ends of microprocessor connect；Touch-screen and microprocessor
I/O mouths connection；The power end of power output end and microprocessor connects；The communication interface of communication interface circuit and microprocessor
End connection；Alarm is connected with microprocessor I/O mouths；
The input difference of main power source control drive circuit, forward current control drive circuit and negative current control drive circuit
It is connected with the I/O mouths of microprocessor；The output end of main power source control drive circuit is connected with the input of main power source control circuit；
The output end of main power source control circuit is connected with the control terminal of main A.C. contactor；Forward current controls the output end of drive circuit
It is connected with the input of forward current control circuit, the output end of forward current control circuit and the control of positive A.C. contactor
End connection；The output end of negative current control drive circuit is connected with the input of negative current control circuit, negative current control
The output end of circuit processed is connected with the control terminal of negative sense A.C. contactor；The output end of temperature sensor and microprocessor A/D ends
Connection；The I/O mouths of the input of servomotor drive circuit and microprocessor connect, the output end of servomotor drive circuit with
Strong current generator connects, for driving the auto-transformer servomotor automatic voltage regulating circuit in strong current generator to work.
3. a kind of current transformer demarcation high-current generation device according to claim 1, it is characterized in that：The big electricity
Flow-generator includes auto-transformer servomotor automatic voltage regulating circuit, rising current transformer；Auto-transformer servomotor is automatic
The input of regulating circuit is connected with the output end of main A.C. contactor, auto-transformer servomotor automatic voltage regulating circuit it is defeated
Go out end to be connected with the input of rising current transformer, the output end of rising current transformer is connected with rectification and filter circuit.
4. a kind of current transformer demarcation high-current generation device according to claim 3, it is characterized in that：Flow up transformation
The output winding of device is 1 circle, and rising current transformer power is 10kW.
5. a kind of current transformer demarcation high-current generation device according to claim 1, it is characterized in that：The rectification
And filter circuit includes rectifier bridge and smoothing reactor, the input of smoothing reactor and the output end of rectifier bridge are connected, are used for
Suppress the fluctuation of electric current；The rectifier bridge using four rated current 2500A and the above Group of Silicon Controlled Rectifier into bridge rectifier electricity
Stream.
6. a kind of current transformer demarcation high-current generation device according to claim 1, it is characterized in that：The forward direction
A.C. contactor and negative sense A.C. contactor use rated current 2500A and the A.C. contactor of the above, and contacts of contactor
Contact resistance is less than 1m Ω.
7. a kind of current transformer demarcation high-current generation device according to claim 1, it is characterized in that：The sampling
Resistance is the precision resistance that resistance is 40 μ Ω, and connection sampling resistor, the output loop resistance of tested current transformer are limited in
2.5m Ω and following, maximum output AC current values reach 2000A.
8. a kind of current transformer demarcation high-current generation device according to claim 1, it is characterized in that：The touch
Shield for setting and showing the current value and the sense of current that are manually set, when electric current transfinites alarm circuit alarm, prompt input
Current value is wrong；The temperature value that the touch-screen measures for displays temperature sensor simultaneously, when temperature over-range alarm circuit
Alarm.
9. high-current generation device control method is used in a kind of current transformer demarcation, it is characterized in that：
Tested current transformer is concatenated into sampling resistor loop during use；
When manually setting current transformer demarcation current value and the sense of current, step includes：
1) a certain current value and the sense of current are set by touch-screen, current value setting range is -1200A~1200A；Work as setting
Current value when transfiniting, warning circuit alarm；Test job starts, and presses the main A.C. contactor of touch-screen switch key control and connects
It is logical；
2) microprocessor controls auto-transformer according to the current value and the sense of current of setting using servomotor drive circuit
The output voltage size of servomotor automatic voltage regulating circuit, so as to adjust the AC current values of rising current transformer output, alternating current
Flow through over commutation and filter circuit is changed into DC current, DC current is positive by the control output of positively or negatively A.C. contactor
Or negative sense DC current, positively or negatively DC current flow through sampling resistor and tested current transformer, when DC current flows through
During sampling resistor, d. c. voltage signal is formed at sampling resistor both ends, sampling resistor both end voltage signal is sent as feedback signal
To the voltage collection circuit of Centralized Controller；
3) microprocessor judges the DC current size of sampling resistor after collecting voltage, if being higher or lower than setting electric current value,
Centralized Controller controls the output voltage size of auto-transformer servomotor automatic voltage regulating circuit, regulation rising current transformer output
AC current values size, until output DC current size meet setting value and setting electric current accuracy rating；If control produces
Then microprocessor controls positive A.C. contactor to connect to forward current by forward current control circuit, while passes through negative current
Control circuit control negative sense A.C. contactor disconnects, then flows through forward current in sampling resistor and tested current transformer loop；
Microprocessor controls positive A.C. contactor to disconnect by forward current control circuit if control produces negative current, leads to simultaneously
Cross negative current control circuit control negative sense A.C. contactor to connect, then flowed through in sampling resistor and tested current transformer loop
Negative current；
It is operated when automatically controlling according to the flow of predetermined set in the microprocessor, step includes：
First, to connect positive A.C. contactor and produce positive direction electric current, electric current progressively increases to 1200A by 0 according to time interval,
Then, 0 is automatically reduced to according to time interval, then J1 is closed into connection negative sense A.C. contactor and is switched to opposite direction electric current, electricity
Stream tapers to 1200A by 0 according to time interval, finally, 0 is changed to according to time interval, wherein, between the curent change time
The value arbitrarily set between 1-100S is divided into, current transformer so can be detected forward and reverse whole by curent change repeatedly
The measurement accuracy of the individual each point of process compares, and examines the measurement accuracy of current transformer；
Cut off main A.C. contactor, you can close high-current generation device.
10. a kind of control method of current transformer demarcation high-current generation device according to claim 9, its feature
It is：The current precision scope is 0.1 ‰.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710712259.2A CN107544324B (en) | 2017-08-18 | 2017-08-18 | Current transformer calibration high-current generation device and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710712259.2A CN107544324B (en) | 2017-08-18 | 2017-08-18 | Current transformer calibration high-current generation device and its control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107544324A true CN107544324A (en) | 2018-01-05 |
| CN107544324B CN107544324B (en) | 2019-10-01 |
Family
ID=60958373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710712259.2A Active CN107544324B (en) | 2017-08-18 | 2017-08-18 | Current transformer calibration high-current generation device and its control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107544324B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441634A (en) * | 2019-08-20 | 2019-11-12 | 国网江苏省电力有限公司电力科学研究院 | A kind of high-tension switch gear high current generating system |
| CN111830933A (en) * | 2020-07-16 | 2020-10-27 | 广东亨通光电科技有限公司 | Heating element detection system, method and device and storage medium |
| CN112650343A (en) * | 2020-12-10 | 2021-04-13 | 国网辽宁省电力有限公司抚顺供电公司 | Intelligent changeable load generator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2192091Y (en) * | 1994-04-09 | 1995-03-15 | 赵子臣 | Intelligence charging machine |
| CN201628762U (en) * | 2010-04-10 | 2010-11-10 | 河北创科电子科技有限公司 | Overall characteristic test system of DC power supply |
| CN103323646A (en) * | 2013-06-04 | 2013-09-25 | 安徽安凯汽车股份有限公司 | Current sensor for electric vehicle and detecting method by means of same |
| CN204422593U (en) * | 2015-03-18 | 2015-06-24 | 武汉市合众电气设备制造有限公司 | A kind of strong current generator |
| CN106405467A (en) * | 2016-05-04 | 2017-02-15 | 中国电力科学研究院 | Low-voltage current transformer short time thermocurrent automation test apparatus and method |
-
2017
- 2017-08-18 CN CN201710712259.2A patent/CN107544324B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2192091Y (en) * | 1994-04-09 | 1995-03-15 | 赵子臣 | Intelligence charging machine |
| CN201628762U (en) * | 2010-04-10 | 2010-11-10 | 河北创科电子科技有限公司 | Overall characteristic test system of DC power supply |
| CN103323646A (en) * | 2013-06-04 | 2013-09-25 | 安徽安凯汽车股份有限公司 | Current sensor for electric vehicle and detecting method by means of same |
| CN204422593U (en) * | 2015-03-18 | 2015-06-24 | 武汉市合众电气设备制造有限公司 | A kind of strong current generator |
| CN106405467A (en) * | 2016-05-04 | 2017-02-15 | 中国电力科学研究院 | Low-voltage current transformer short time thermocurrent automation test apparatus and method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441634A (en) * | 2019-08-20 | 2019-11-12 | 国网江苏省电力有限公司电力科学研究院 | A kind of high-tension switch gear high current generating system |
| CN111830933A (en) * | 2020-07-16 | 2020-10-27 | 广东亨通光电科技有限公司 | Heating element detection system, method and device and storage medium |
| CN111830933B (en) * | 2020-07-16 | 2022-03-29 | 广东亨通光电科技有限公司 | Heating element detection system, method and device and storage medium |
| CN112650343A (en) * | 2020-12-10 | 2021-04-13 | 国网辽宁省电力有限公司抚顺供电公司 | Intelligent changeable load generator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107544324B (en) | 2019-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101762800B (en) | Battery managing system testing platform | |
| CN101499673B (en) | Multifunctional integrated charger for electric automobile having compensation charging function | |
| CN107599857A (en) | A kind of pure electric automobile charging system and charging method based on lithium battery | |
| US8638063B2 (en) | AC current control of mobile battery chargers | |
| CN106300531B (en) | A kind of power supply change-over device based on charging pile | |
| CN107009905A (en) | Wagon control based on the lithium plating detection in electrified Vehicular battery | |
| CN110549876A (en) | energy output control method and device and hydrogen fuel hybrid electric vehicle | |
| CN106427990A (en) | Hybrid power system and energy management method thereof | |
| CN107544324A (en) | Current transformer demarcation high-current generation device and its control method | |
| CN104079272B (en) | Signal generating circuit | |
| CN207488848U (en) | A kind of DC charging motor with charging gun temperature monitoring module | |
| CN101572435A (en) | Compensating charging method and circuit for electric automobile | |
| CN105785275A (en) | Battery SOH testing device based on charger and method for testing battery SOH | |
| CN106926739A (en) | A kind of moveable charge-discharge system from electric motor car to electric motor car | |
| CN202014128U (en) | Universal charger main loop module of electric automobile | |
| CN205861809U (en) | A kind of common DC bus charger detecting system | |
| CN106696735A (en) | Intelligent monitoring system based on vehicle-mounted lithium battery pack | |
| CN106740153A (en) | A kind of intelligent power power-supply system for pure electric vehicle | |
| CN207345531U (en) | A kind of double source trolleybus charge control system | |
| CN107015091B (en) | Endurance test device for vehicle-mounted DC/DC converter | |
| CN205608156U (en) | Battery SOH detection device based on machine charges | |
| CN208923894U (en) | Portable DC charging machine device | |
| CN106505700A (en) | Charging device and vehicle | |
| CN103280870A (en) | Electric automobile non-contact charging load self-adaption matching device and control method | |
| Joy et al. | Bidirectional contactless charging system using Li-ion battery model |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230823 Address after: No.8, Huyue East Road, Longchi street, Liuhe District, Nanjing City, Jiangsu Province Patentee after: Nanjing Tianzheng Industrial Intelligent Technology Research Institute Co.,Ltd. Address before: 213022, No. 200 Jinling North Road, Jiangsu, Changzhou Patentee before: CHANGZHOU CAMPUS OF HOHAI University |
|
| TR01 | Transfer of patent right |