CN205620523U - Load of high accuracy electric power system storage battery constant current discharge - Google Patents
Load of high accuracy electric power system storage battery constant current discharge Download PDFInfo
- Publication number
- CN205620523U CN205620523U CN201620301163.8U CN201620301163U CN205620523U CN 205620523 U CN205620523 U CN 205620523U CN 201620301163 U CN201620301163 U CN 201620301163U CN 205620523 U CN205620523 U CN 205620523U
- Authority
- CN
- China
- Prior art keywords
- circuit
- resistance
- current
- control circuit
- load
- 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.)
- Expired - Fee Related
Links
Landscapes
- Control Of Voltage And Current In General (AREA)
Abstract
The utility model provides a load of high accuracy electric power system storage battery constant current discharge, including DA output control circuit, current amplification circuit, segmentation load access control circuit, amplifier circuit is gathered to the electric current, electric current AD converting circuit, voltage acquisition AD converting circuit, singlechip operation control circuit and man -machine interaction module, singlechip operation control circuit respectively with man -machine interaction module, DA output control circuit, electric current AD converting circuit, segmentation load access control circuit and voltage acquisition AD converting circuit connect, DA output control circuit and current amplification circuit are connected, segmentation load access control circuit is connected with current amplification circuit and voltage acquisition AD converting circuit respectively, the electric current gather amplifier circuit respectively with electric current amplifier circuit, segmentation load access control circuit and electric current AD converting circuit connect. The utility model discloses the realization electric current is invariable, can be rapid, stable carry out discharging of high accuracy according to the setting value to DC power supply equipment.
Description
Technical field
This utility model relates to DC Electronic Loads field, particularly relates to a kind of high precision electro Force system accumulator battery constant-current discharge load.
Background technology
In system of relay protection; accumulator battery would generally be used as the back-up source of electronics relay protection system; reliability service in order to ensure system of relay protection; accumulator battery must keep effective status the moment, and verifies that the most effective means of accumulator battery carry out the electric discharge of verification property exactly to accumulator battery.The electric discharge of verification property is the nominal capacity according to tested accumulator battery, persistently carries out discharging (lead-acid accumulator is usually 0.1C) by a constant electric current, if duration reaches the requirement of nominal capacity, then illustrates that tested battery group capacity meets requirement.Therefore, need to provide a kind of load equipment to accumulator battery electric discharge in this proof procedure.Owing to the capacity of accumulator battery is relatively big, discharge current is the biggest, it is provided that the load equipment of electric discharge typically requires has several kilowatts of power even going up myriawatt.
In industry, the existing high power DC electronic load that accumulator battery carries out the electric discharge of verification property mainly has four kinds.
The first is to use a fixing high-power pure resistor load (as shown in Figure 1), owing to its load is to immobilize, unadjustable, is the most only suitable for accumulator battery E of a certain fixed capacity, it is impossible to adapt to accumulator battery E of multiple different capabilities；And along with the electric discharge of accumulator battery E, the voltage of accumulator battery E decreases, in the case of load resistance is constant, discharge current can decline therewith, it is impossible to constant, i.e. can not constant-current discharge.
The second is to use multiple switches (to include relay or electrical switch (metal-oxide-semiconductor, IGBT manage)) and resistance wire load combinations turn on realize (as shown in Figure 2), although this load can set the load of access, it is adapted to accumulator battery E of multiple different capabilities, range of application width is a little, but the stair step current that can set electric discharge is rough, according to the current value set, how many switch Guan Bis are selected to make the resistance wire load incision electric discharge of correspondence, owing to selecting great ohmic load to cut by the Guan Bi of switch, therefore continuously adjustabe cannot be made, its stair step current is coarse, current differential is bigger with setting；Simultaneously as the heating of ohmic load causes resistance variations in discharge process so that discharge current also produces change.
The third is to use pwm signal to control load to realize (as shown in Figure 3) by the mode of dutycycle conducting, the method is not constant-current discharge truly, simply current effective value is the steady state value set, pwm signal is generally used to drive IGBT management and control load resistance to turn in certain time ratio so that it is current effective value is constant.Due to existing digital control circuit, that pwm signal control accuracy can be allowed to be made is the highest; therefore the set wide ranges of the method; current marching technique is fine; but the method is to use the control load constantly conducting of high frequency and disconnect; its current harmonics produced is the biggest; owing to conducting electric current is very big, may result in the test overcurrent protection of some measurand or impact failure.
4th kind is to use the temperature controlling High-Power PTC ohmic load to realize (as shown in Figure 4), temperature coefficient characteristics due to PTC resistor load, its change in resistance can be controlled by controlling its temperature, equally, if controlling its temperature to be maintained at steady state value, its resistance the most constant (under equal voltage), therefore the temperature controlling PTC resistor load is used to realize controlling its resistance value, thus control load current, but the temperature controlling PTC resistor load can only be by the way of heat conducts, therefore control slowly, when just startup or change in voltage, cannot control current value at once is setting value；If there are some Parameters variation in discharge process, adjust electric current the most slowly.
Summary of the invention
The technical problems to be solved in the utility model, it is to provide a kind of high precision electro Force system accumulator battery constant-current discharge load, high-speed microprocessor computing circuit is used to coordinate the mode of segment load Access Control circuit, current constant is realized by the conducting electric current of segmentation incision pure resistor load and control transistor, can be rapid, stable by setting value, DC power supply device is carried out high-precision electric discharge, can set point width, real constant-current discharge, no current harmonic wave.
This utility model is achieved in that
nullA kind of high precision electro Force system accumulator battery constant-current discharge load，Including DA output control circuit、Current amplification circuit、Segment load Access Control circuit、Current acquisition amplifying circuit、Electric current A/D convertor circuit、Voltage acquisition A/D convertor circuit、Single-chip microcomputer arithmetic control circuit and human-computer interaction module，Described single-chip microcomputer arithmetic control circuit respectively with described human-computer interaction module、Described DA output control circuit、Described electric current A/D convertor circuit、Described segment load Access Control circuit and described voltage acquisition A/D convertor circuit connect，Described DA output control circuit is connected with described current amplification circuit，Described segment load Access Control circuit is connected with described current amplification circuit and described voltage acquisition A/D convertor circuit respectively，Described current acquisition amplifying circuit respectively with described current amplification circuit、Described segment load Access Control circuit and described electric current A/D convertor circuit connect，The input anode of accumulator battery power supply is connected between described current amplification circuit and described segment load Access Control circuit，The input negative terminal of battery feed is connected to described current acquisition amplifying circuit.
Further, described segment load Access Control circuit includes a plurality of control unit, described control unit includes an a resistance Rn and transistor Qn, the grid of described transistor Qn is connected with described single-chip microcomputer arithmetic control circuit, the source electrode of described transistor Qn is connected with described current amplification circuit and described current acquisition amplifying circuit respectively, the drain electrode of described transistor Qn is connected with one end of described resistance Rn, the other end of described resistance Rn respectively with described current amplification circuit, the input anode of described voltage acquisition A/D convertor circuit and battery feed connects, parallel connection is carried out between each described control unit.
nullFurther，Described current acquisition amplifying circuit includes resistance R5、Resistance R6、Resistance R7、Resistance R8、Resistance R9 and operational amplifier M，One end of described resistance R5 respectively with described current amplification circuit、One end of described segment load Access Control circuit and described resistance R6 connects，The other end of described resistance R5 is connected with one end of described resistance R7 and the input negative terminal of battery feed respectively，The other end of described resistance R6 in-phase input end with one end of described resistance R8 and described operational amplifier M respectively is connected，The other end of described resistance R7 one end with the inverting input of described operational amplifier M and described resistance R9 respectively is connected，The other end ground connection of described resistance R8，The outfan of described operational amplifier M is connected with the other end of described resistance R9 and described electric current A/D convertor circuit respectively.
Further, described current amplification circuit includes resistance R1, resistance R2 and audion Q1, one end of described resistance R1 is connected with described DA output control circuit, the other end of described resistance R1 is connected with the base stage of described audion Q1, one end of described resistance R2 is connected with the colelctor electrode of described audion Q1, the other end of described resistance R2 input anode with described segment load Access Control circuit and battery feed respectively is connected, and the emitter stage of described audion Q1 is connected with described segment load Access Control circuit and described current acquisition amplifying circuit respectively.
Further, described human-computer interaction module includes that LCDs and keyboard, described LCDs and described keyboard are connected to described single-chip microcomputer arithmetic control circuit.
The utility model has the advantage of:
1, precision is high, uses the mode of switch conduction that constant-resistance load is directly accessed electric discharge, coordinates with linear constant current circuit, it is possible to discharge DC source more accurately and stably, the true load capacity reflecting tested power supply and the true capacity of accumulator；
2, adjustable extent width, uses multistage stagewise to access test, according to set discharge current, selects some sections of loads to access test by assignment algorithm, and segmentation is the most, can set current range the widest；
3, current harmonics is little, does not damage measurand, uses linear constant current circuit to coordinate constant-resistance discharge mode, it is to avoid current harmonics produced by PWM mode, contains because big electric current when PWM controls conducting causes the test overcurrent protection of some measurand or impact failure simultaneously；
4, control is rapid, stable, during star t-up discharge, single-chip microcomputer arithmetic control circuit at a high speed controls access and loads, make load discharge by setting value immediately.
Accompanying drawing explanation
This utility model is further described the most in conjunction with the embodiments.
Fig. 1 is the schematic diagram of the first constant-current discharge mode in prior art.
Fig. 2 is the schematic diagram of the second constant-current discharge mode in prior art.
Fig. 3 is the schematic diagram of the third constant-current discharge mode in prior art.
Fig. 4 is the schematic diagram of the 4th kind of constant-current discharge mode in prior art.
Fig. 5 is the structural representation of this utility model a kind of high precision electro Force system accumulator battery constant-current discharge load.
Label declaration in figure:
1-DA output control circuit, 2-current amplification circuit, 3-segment load Access Control circuit, 4-current acquisition amplifying circuit, 5-electric current A/D convertor circuit, 6-voltage acquisition A/D convertor circuit, 7-single-chip microcomputer arithmetic control circuit, 8-human-computer interaction module, 81-LCDs, 82-keyboard.
Detailed description of the invention
Below in conjunction with specific embodiment this utility model made and describing in detail further, but structure of the present utility model is not limited in following example.
nullRefer to shown in Fig. 5，A kind of high precision electro Force system accumulator battery constant-current discharge load of the present utility model，Including DA output control circuit 1、Current amplification circuit 2、Segment load Access Control circuit 3、Current acquisition amplifying circuit 4、Electric current A/D convertor circuit 5、Voltage acquisition A/D convertor circuit 6、Single-chip microcomputer arithmetic control circuit 7 and human-computer interaction module 8，Described single-chip microcomputer arithmetic control circuit 7 respectively with described human-computer interaction module 8、Described DA output control circuit 1、Described electric current A/D convertor circuit 5、Described segment load Access Control circuit 3 and described voltage acquisition A/D convertor circuit 6 connect，Described DA output control circuit 1 is connected with described current amplification circuit 2，Described segment load Access Control circuit 3 is connected with described current amplification circuit 2 and described voltage acquisition A/D convertor circuit 6 respectively，Described current acquisition amplifying circuit 4 respectively with described current amplification circuit 2、Described segment load Access Control circuit 3 and described electric current A/D convertor circuit 5 connect，The input anode of accumulator battery power supply is connected between described current amplification circuit 2 and described segment load Access Control circuit 3，The input negative terminal of battery feed is connected to described current acquisition amplifying circuit 4.
Specifically, described current amplification circuit 2 includes resistance R1, resistance R2 and audion Q1, one end of described resistance R1 is connected with described DA output control circuit 1, the other end of described resistance R1 is connected with the base stage of described audion Q1, one end of described resistance R2 is connected with the colelctor electrode of described audion Q1, the other end of described resistance R2 input anode with described segment load Access Control circuit 3 and battery feed respectively is connected, and the emitter stage of described audion Q1 is connected with described segment load Access Control circuit 3 and described current acquisition amplifying circuit 4 respectively.
In conjunction with described DA output control circuit 1 and described current amplification circuit 2, described DA output control circuit 1 and described current amplification circuit 2 are by controlling described segment load Access Control circuit 3 after setting value computing by after setting current value electric discharge by described single-chip microcomputer (MCU) arithmetic control circuit 7, remaining trickle error is controlled described DA output control circuit 1 by described single-chip microcomputer (MCU) arithmetic control circuit 7 and exports corresponding magnitude of voltage, then is driven described current amplification circuit 2 to discharge by described DA output control circuit 1.
Specifically, described segment load Access Control circuit 3 includes a plurality of control unit, described control unit includes an a resistance Rn and transistor Qn, the grid of described transistor Qn is connected with described single-chip microcomputer arithmetic control circuit, the source electrode of described transistor Qn is connected with described current amplification circuit 2 and described current acquisition amplifying circuit respectively, the drain electrode of described transistor Qn is connected with one end of described resistance Rn, the other end of described resistance Rn respectively with described current amplification circuit 2, the input anode of described voltage acquisition A/D convertor circuit 6 and battery feed connects, parallel connection is carried out between each described control unit, in the present embodiment, n takes 2, 3 ... M；Described segment load Access Control circuit 3 is accessed electric discharge by described single-chip microcomputer (MCU) arithmetic control circuit 7 by controlling its some sections of pure resistor loads after setting value computing, making discharge current close to setting value, having can set point width, advantage without harmonic current.
nullSpecifically，Described current acquisition amplifying circuit 4 includes resistance R5、Resistance R6、Resistance R7、Resistance R8、Resistance R9 and operational amplifier M，One end of described resistance R5 respectively with described current amplification circuit 2、One end of described segment load Access Control circuit 3 and described resistance R6 connects，The other end of described resistance R5 is connected with one end of described resistance R7 and the input negative terminal of battery feed respectively，The other end of described resistance R6 in-phase input end with one end of described resistance R8 and described operational amplifier M respectively is connected，The other end of described resistance R7 one end with the inverting input of described operational amplifier M and described resistance R9 respectively is connected，The other end ground connection of described resistance R8，The outfan of described operational amplifier M is connected with the other end of described resistance R9 and described electric current A/D convertor circuit 5 respectively.
Specifically, described human-computer interaction module 8 includes that LCDs 81 and keyboard 82, described LCDs 81 are connected to described single-chip microcomputer arithmetic control circuit 7 with described keyboard 82.
It addition, described DA output control circuit 1 is possessed or by outside DA chip, the analog conversion function of circuit realiration, all in protection domain of the present utility model by single-chip microcomputer (MCU) is internal；Described electric current A/D convertor circuit 5 is possessed or by outside A/D chip, the analog-digital conversion function of circuit realiration, all in protection domain of the present utility model by single-chip microcomputer (MCU) is internal.
Operation principle of the present utility model is as follows:
First, before star t-up discharge, operator need to be inputted by the keyboard 82 of described human-computer interaction module 8 to need the current value of electric discharge, i.e. setting value.After star t-up discharge, described single-chip microcomputer (MCU) arithmetic control circuit 7 is according to the current value set and the magnitude of voltage obtained by described voltage acquisition A/D convertor circuit 6, controlling the several Guan Bis in K1～KN of described segment load Access Control circuit 3 after computing, its algorithm is as follows:
The load resistance R=magnitude of voltage U/ accessed is needed to set current value I, but the resistance value that described segmentation accesses load control circuit 3 access cannot be just equal to the resistance value needing access, resistance value Rn (resistance of every section is the most equal) of the load resistance R/ mono-section that load resistance number N=therefore accessed accesses, N round numbers part, discharge current In=magnitude of voltage U/ (resistance value RN*N of a section) that now segment load portion produces.Remaining described current amplification circuit 2 needs the discharge current In that the electric current I0=setting value I-segment load portion of electric discharge produces；
Obtained the current value of described current amplification circuit 2 by algorithm above after, described single-chip microcomputer (MCU) arithmetic control circuit 7 controls described DA output control circuit 1 and exports corresponding magnitude of voltage, this magnitude of voltage produces current value by the input resistance of described current amplification circuit 2, transistor obtain the discharge current needed after amplifying；
Described current acquisition amplifying circuit 4 carries out analog digital conversion through described electric current AD conversion 5 after being amplified by total discharge current, described single-chip microcomputer (MCU) arithmetic control circuit 7 obtains real-time discharge current value by described electric current A/D convertor circuit 5, when discharge current value does not waits with setting value (generally along with the electric discharge of accumulator battery, its terminal voltage can decline, and causes electric current to reduce).Described single-chip microcomputer (MCU) arithmetic control circuit 7 is controlled described DA output control circuit 1 processed at once and is increased or reduce output voltage, thus changes the current value of described current amplification circuit 2, causes discharge current value to remain setting value.
This patent scheme can be summarized as first passing through algorithm can show that the dead load needing several sections accesses, it is coarse adjustment, the current value of electric discharge is needed being obtained Current amplifier part by algorithm, it is fine tuning, when in discharge process, during actual discharge current value deviation setting value, microcomputerized controller adjusts fine tuning current segment immediately so that it is discharge current value is the most constant in setting value.
It is to realize current constant by the conducting electric current of control transistor owing to described segmentation accesses load control circuit 3, transistor is operated in linear amplification region, himself consumes bigger energy, limited by transistor self rated power is less, the discharge power of constant-current transistor circuit cannot be made bigger, simultaneously for ensureing that transistor does not burns out, it is necessary to add radiator and air blast cooling.
When electric discharge starts, described single-chip microcomputer (MCU) arithmetic control circuit 7 calculates, according to the size of current set and the voltage swing collected, the resistance needing to access how many sections, discharge current just can be made closest to setting value, the remaining output being controlled constant-current transistor with setting value difference portion by described DA output control circuit 1, it is made to discharge by setting value accurately, current control accuracy is high, no current harmonic wave.
In sum, advantage of the present utility model is as follows:
1, precision is high, uses the mode of switch conduction that constant-resistance load is directly accessed electric discharge, coordinates with linear constant current circuit, it is possible to discharge DC source more accurately and stably, the true load capacity reflecting tested power supply and the true capacity of accumulator；
2, adjustable extent width, uses multistage stagewise to access test, according to set discharge current, selects some sections of loads to access test by assignment algorithm, and segmentation is the most, can set current range the widest；
3, current harmonics is little, does not damage measurand, uses linear constant current circuit to coordinate constant-resistance discharge mode, it is to avoid current harmonics produced by PWM mode, contains because big electric current when PWM controls conducting causes the test overcurrent protection of some measurand or impact failure simultaneously；
4, control is rapid, stable, during star t-up discharge, single-chip microcomputer arithmetic control circuit at a high speed controls access and loads, make load discharge by setting value immediately.
Although the foregoing describing detailed description of the invention of the present utility model; but those familiar with the art is to be understood that; we are merely exemplary described specific embodiment; rather than for the restriction to scope of the present utility model; those of ordinary skill in the art, in the equivalent modification made according to spirit of the present utility model and change, should be contained in scope of the claimed protection of the present utility model.
Claims (5)
1. a high precision electro Force system accumulator battery constant-current discharge load, it is characterised in that: include DA
Output control circuit, current amplification circuit, segment load Access Control circuit, current acquisition amplifying circuit,
Electric current A/D convertor circuit, voltage acquisition A/D convertor circuit, single-chip microcomputer arithmetic control circuit and man-machine
Interactive module, described single-chip microcomputer arithmetic control circuit is defeated with described human-computer interaction module, described DA respectively
Go out control circuit, described electric current A/D convertor circuit, described segment load Access Control circuit and described electricity
Pressure gathers A/D convertor circuit and connects, and described DA output control circuit is connected with described current amplification circuit,
Described segment load Access Control circuit respectively with described current amplification circuit and described voltage acquisition AD
Change-over circuit connect, described current acquisition amplifying circuit respectively with described current amplification circuit, described segmentation
Load Access Control circuit and described electric current A/D convertor circuit connect, the input anode of accumulator battery power supply
It is connected between described current amplification circuit and described segment load Access Control circuit, battery feed
Input negative terminal is connected to described current acquisition amplifying circuit.
2. a kind of high precision electro Force system accumulator battery constant-current discharge load as claimed in claim 1,
It is characterized in that: described segment load Access Control circuit includes a plurality of control unit, described control list
Unit includes an a resistance Rn and transistor Qn, the grid of described transistor Qn and described single-chip microcomputer computing
Control circuit connect, the source electrode of described transistor Qn respectively with described current amplification circuit and described electric current
Collection amplifying circuit connects, and the drain electrode of described transistor Qn is connected with one end of described resistance Rn, institute
State the other end of resistance Rn respectively with described current amplification circuit, described voltage acquisition A/D convertor circuit
And the input anode of battery feed connects, between each described control unit, carry out parallel connection.
3. a kind of high precision electro Force system accumulator battery constant-current discharge load as claimed in claim 1,
It is characterized in that: described current acquisition amplifying circuit includes resistance R5, resistance R6, resistance R7, electricity
Resistance R8, resistance R9 and operational amplifier M, one end of described resistance R5 is put with described electric current respectively
One end of big circuit, described segment load Access Control circuit and described resistance R6 connects, described resistance
The other end of R5 is connected with one end of described resistance R7 and the input negative terminal of battery feed respectively, institute
State the other end of resistance R6 respectively with one end of described resistance R8 and the homophase of described operational amplifier M
Input connects, the other end of described resistance R7 respectively with the inverting input of described operational amplifier M
And one end of described resistance R9 connects, the other end ground connection of described resistance R8, described operational amplifier
The outfan of M is connected with the other end of described resistance R9 and described electric current A/D convertor circuit respectively.
4. a kind of high precision electro Force system accumulator battery constant-current discharge load as claimed in claim 1,
It is characterized in that: described current amplification circuit includes resistance R1, resistance R2 and audion Q1, institute
The one end stating resistance R1 is connected with described DA output control circuit, the other end of described resistance R1 with
The base stage of described audion Q1 connects, one end of described resistance R2 and the current collection of described audion Q1
Pole connect, the other end of described resistance R2 respectively with described segment load Access Control circuit and accumulator
The input anode of power supply connects, and the emitter stage of described audion Q1 accesses control with described segment load respectively
Circuit processed and described current acquisition amplifying circuit connect.
5. a kind of high precision electro Force system accumulator battery constant-current discharge load as claimed in claim 1,
It is characterized in that: described human-computer interaction module includes LCDs and keyboard, described LCDs
It is connected to described single-chip microcomputer arithmetic control circuit with described keyboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620301163.8U CN205620523U (en) | 2016-04-12 | 2016-04-12 | Load of high accuracy electric power system storage battery constant current discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620301163.8U CN205620523U (en) | 2016-04-12 | 2016-04-12 | Load of high accuracy electric power system storage battery constant current discharge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205620523U true CN205620523U (en) | 2016-10-05 |
Family
ID=57029357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620301163.8U Expired - Fee Related CN205620523U (en) | 2016-04-12 | 2016-04-12 | Load of high accuracy electric power system storage battery constant current discharge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205620523U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646264A (en) * | 2017-01-20 | 2017-05-10 | 深圳市木村机电有限公司 | Battery discharge tester |
| CN109638979A (en) * | 2018-11-06 | 2019-04-16 | 全球能源互联网研究院有限公司 | A kind of protective device and method of magnetic resonance wireless power transmission equipment receiving end |
| CN109669141A (en) * | 2018-12-18 | 2019-04-23 | 成都纵横大鹏无人机科技有限公司 | A kind of discharge test method, device and equipment |
| CN113675909A (en) * | 2021-07-07 | 2021-11-19 | 深圳奥特迅电力设备股份有限公司 | Wide-range high-power discharge device and method |
-
2016
- 2016-04-12 CN CN201620301163.8U patent/CN205620523U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646264A (en) * | 2017-01-20 | 2017-05-10 | 深圳市木村机电有限公司 | Battery discharge tester |
| CN106646264B (en) * | 2017-01-20 | 2024-03-22 | 深圳市木村机电有限公司 | Battery discharge tester |
| CN109638979A (en) * | 2018-11-06 | 2019-04-16 | 全球能源互联网研究院有限公司 | A kind of protective device and method of magnetic resonance wireless power transmission equipment receiving end |
| CN109669141A (en) * | 2018-12-18 | 2019-04-23 | 成都纵横大鹏无人机科技有限公司 | A kind of discharge test method, device and equipment |
| CN113675909A (en) * | 2021-07-07 | 2021-11-19 | 深圳奥特迅电力设备股份有限公司 | Wide-range high-power discharge device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205620523U (en) | Load of high accuracy electric power system storage battery constant current discharge | |
| US9871459B2 (en) | Method and apparatus for deriving current for control in a resonant power converter | |
| CN203872056U (en) | Direct-current power supply controlled by constant power | |
| CN103973114A (en) | Constant power control direct-current power supply | |
| CN105429170B (en) | A kind of microgrid inverter droop control method based on adjustable virtual impedance | |
| Ahmed et al. | Stability study of variable step size incremental conductance/impedance MPPT for PV systems | |
| CN102204403A (en) | An electronic heater and a control method thereof | |
| CN104901394B (en) | Light-storage-type charging station quasi-proportional-resonant (PR) droop control method based on SOC (State of Charge) | |
| CN103033697A (en) | Capacitor aging test circuit and aging system | |
| CN204333898U (en) | A kind of convertible frequency air-conditioner and Intelligent Power Module overcurrent protection Circuit tuning thereof | |
| Jiang et al. | A leakage current eliminated and power oscillation suppressed single-phase single-stage nonisolated photovoltaic grid-tied inverter and its improved control strategy | |
| Vangari et al. | Modeling and control of DC/DC boost converter using K-factor control for MPPT of solar PV system | |
| CN106972509A (en) | A kind of net side control strategy for suppressing direct drive wind power sub-synchronous oscillation | |
| Aryan et al. | Primary control strategies for power sharing and voltage regulation in dc microgrid: a review | |
| CN111614281A (en) | Novel low-voltage high-frequency band inverter circuit | |
| Tongzhen et al. | Topology and control strategy of upqc based on high frequency isolation dc/dc converter | |
| CN101888188A (en) | The apparatus and method that are used for the power controlling converter | |
| CN217133305U (en) | Aging circuit for diode | |
| Fahmi et al. | Design new voltage balancing control series connected for HV-IGBT's. | |
| Ding et al. | A junction temperature balance control among sub-modules for modular multilevel converter | |
| CN107742974A (en) | A kind of electric discharge device and energy storage device discharge system | |
| Wang et al. | A High Bandwidth Bipolar Power Supply for the Fast Correctors in the APS Upgrade | |
| CN110880882B (en) | Direct-current chain voltage control system and method based on Z-source inverter | |
| CN108306293B (en) | Low-voltage electric energy quality control device | |
| Tang et al. | Stability assessment of utility PV integration to the distributed systems based on DQ frame impedances and GNC |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161005 Termination date: 20170412 |