CN203456906U - Energy-saving apparatus based on storage battery charge and discharge system - Google Patents

Energy-saving apparatus based on storage battery charge and discharge system Download PDF

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Publication number
CN203456906U
CN203456906U CN201320556701.4U CN201320556701U CN203456906U CN 203456906 U CN203456906 U CN 203456906U CN 201320556701 U CN201320556701 U CN 201320556701U CN 203456906 U CN203456906 U CN 203456906U
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China
Prior art keywords
circuit
bipolar transistor
insulated gate
gate bipolar
signal
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Expired - Fee Related
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CN201320556701.4U
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Chinese (zh)
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汤一新
王宝安
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Jiangsu Hui Jieneng Power Tech Corp Inc
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Jiangsu Hui Jieneng Power Tech Corp Inc
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

Abstract

The utility model discloses an energy-saving apparatus based on a storage battery charge and discharge system, belonging to the technical fields of energy saving and environment protection. The apparatus is connected to a bus of a frequency converter, and comprises a storage battery (1), a DC/DC conversion circuit (2) and a storage battery charge and discharge control module (3). The storage battery (1) is connected with the DC/DC conversion circuit (2), and the DC/DC conversion circuit (2) is connected to the bus of the frequency converter. The storage battery charge and discharge control module (3) is connected with the storage battery (1) and the bus, and controls the working state of the DC/DC conversion circuit (2) by a detected signal. The energy-saving apparatus provided by the utility model achieves the bidirectional flow of the electric energy, such that the storage battery in the system can store extra electric energy from a generator and release the electric energy for powering the generator during the operation of the generator, thereby increasing the energy utilization rate and reducing the cost. The energy-saving apparatus is suitable for large-scale applications.

Description

A kind of energy saver based on accumulator charging/discharging system
Technical field
The utility model belongs to energy-conserving and environment-protective technical field, particularly a kind of energy saver based on accumulator charging/discharging system.
Background technology
Electrical machine energy-saving system is one of China's ten large energy conservation projects, high speed development along with modern power electronics technology and automatic control technology, variable-frequency control technique has also obtained developing rapidly, answer National Development and Reform Committee's requirement, electrical machine energy-saving should adopt variable-frequency control technique, this technology can not only realize the stepless time adjustment of motor, the more important thing is and can improve Electric Machine Control precision and energy savings.
But most of general frequency changer are all first rectifications, rear inversion.Be that front end adopts uncontrollable device (diode), after the large electric capacity of DC side, it is three-phase fully-controlled inverter bridge, such structure can make the electric current of input that serious distortion occurs, increase harmonic pollution, the energy that simultaneously motor produces when generating state can not reverse flow telegram in reply net, can only charge to intermediate capacitance, make it voltage and raise, when serious, can affect the safety of whole system.
In frequency conversion speed-adjusting system, for the excess energy that motor is produced when the regenerative power generation state consumes, conventionally there are two kinds of methods, a kind of is the method that adopts resistance power consumption and water resistance power consumption, at frequency converter DC bus capacitor two ends serial connection high-power resistance, mode by regenerated energy with heat energy consumes, but this method has consumed a large amount of electric energy, has increased production and maintenance cost.Another kind method is in the controlled inverter bridge of frequency converter intermediate capacitance side joint three-phase, the unnecessary electric energy producing while changing motor into generating state by motoring condition is given electrical network, so just, can reach the object of motor four quadrant running and energy savings, but this method cost is larger, there is larger difficulty in large-scale application.
Utility model content
The problem existing in order to solve above-mentioned background technology, the utility model aims to provide a kind of energy saver based on accumulator charging/discharging system, to improve energy utilization rate, reduces cost, is conducive to large-scale application.
In order to realize above-mentioned technical purpose, the technical solution of the utility model is:
A kind of energy saver based on accumulator charging/discharging system, this device is connected on the bus of frequency converter, comprise batteries, DC/DC translation circuit and accumulator cell charging and discharging control module, described batteries connects DC/DC translation circuit, DC/DC translation circuit is connected on the bus of frequency converter, accumulator cell charging and discharging control module connects respectively batteries and bus, and with the operating state of the signal controlling DC/DC translation circuit that detects.
Wherein, above-mentioned DC/DC translation circuit comprises inductance, the first insulated gate bipolar transistor, the second insulation bipolar transistor, the first diode and the second diode, the source electrode of the drain electrode of described the first insulated gate bipolar transistor and the second insulation bipolar transistor is connected on bus, the source electrode of the second insulated gate bipolar transistor is also connected with the negative pole of batteries, described the first diode and the first insulated gate bipolar transistor reverse parallel connection, described the second diode and the second insulated gate bipolar transistor reverse parallel connection, the source electrode of the first insulated gate bipolar transistor is connected the positive pole of batteries with the tie point of the drain electrode of the second insulated gate bipolar transistor by inductance, the grid of described the first insulated gate bipolar transistor and the first insulated gate bipolar transistor is connected with accumulator cell charging and discharging control module respectively.
Wherein, above-mentioned accumulator cell charging and discharging control module inclusion test circuit, pulse generating circuit, pi regulator, two-way DC/DC converter controller and protective circuit, the bus voltage signal that described testing circuit detects and battery condition signal, the various status signals of system and fault-signal that protective circuit detects send respectively two-way DC/DC converter controller to, two-way DC/DC converter controller sends signal to by pi regulator and pulse generating circuit the grid of the first insulated gate bipolar transistor and the second insulated gate bipolar transistor in DC/DC translation circuit successively.
Wherein, the above-mentioned testing circuit of stating comprises busbar voltage testing circuit, side voltage detecting circuit, current detection circuit, capacity detection circuit and temperature sensing circuit, described busbar voltage testing circuit detects bus voltage signal, side voltage detecting circuit, current detection circuit, capacity detection circuit and temperature sensing circuit detect respectively side voltage signal, current signal, capacity signal and the temperature signal of batteries, and send the signal detecting to two-way DC/DC converter controller.
Wherein, above-mentioned pulse generating circuit adopts integrated control chip to produce control impuls.
Wherein, above-mentioned batteries is in series by least 2 lead acid accumulators.
The utility model adopts above technical scheme compared with prior art, has following technique effect:
This energy saver is comprised of storage battery, storage battery charge-discharge control system and DC/DC converter, can realize the function of realizing bidirectional electric energy flow, storage battery in system both can have been stored from the unnecessary electric energy of generator, can when generator is worked, the electric energy of storage be discharged for generator again, thereby greatly improved the utilance of energy, for energy savings, there is important use value; Meanwhile, device is installed, moves, safeguards simple and convenient, and cost is lower, has the prospect of wide development.
Accompanying drawing explanation
Fig. 1 is system construction drawing of the present utility model.
Fig. 2 is the circuit block diagram of energy saver in the utility model.
Fig. 3 is PI control block diagram of the present utility model.
Label declaration: 1---batteries; 2---DC/DC translation circuit; 3---accumulator cell charging and discharging control module; 4---testing circuit; 5---pulse generating circuit; 6---pi regulator; 7---two-way DC/DC converter controller; 8---protective circuit.
Main designation in accompanying drawing: IGBT1, IGBT2 are first, second insulated gate bipolar transistors; D1, D2 are first, second diodes; L is inductance; Vref is voltage given; Vout is Voltage Feedback; Iref is given value of current; Iout is current feedback.
Embodiment
Below with reference to accompanying drawing, the technical solution of the utility model is elaborated.
System construction drawing of the present utility model as shown in Figure 1, this device is connected on the bus of frequency converter, comprise batteries 1, DC/DC translation circuit 2 and accumulator cell charging and discharging control module 3, described batteries 1 connects DC/DC translation circuit 2, DC/DC translation circuit 2 is connected on the bus of frequency converter, accumulator cell charging and discharging control module 3 connects respectively batteries 1 and bus, and with the operating state of the signal controlling DC/DC translation circuit 2 that detects.
Circuit block diagram as shown in Figure 2, in the present embodiment, batteries 1 is comprised of the lead-acid battery of connecting, and when motor is during in regenerative power generation state, batteries 1 is by unnecessary electrical power storage; When motor is during in motoring condition, batteries 1 discharges the electric energy of storage to offer machine operation as the energy.
DC/DC translation circuit 2 comprises inductance, the first insulated gate bipolar transistor, the second insulation bipolar transistor, the first diode and the second diode, the source electrode of the drain electrode of described the first insulated gate bipolar transistor and the second insulation bipolar transistor is connected on bus, the source electrode of the second insulated gate bipolar transistor also with the negative pole of batteries 1 is connected, described the first diode and the first insulated gate bipolar transistor reverse parallel connection, described the second diode and the second insulated gate bipolar transistor reverse parallel connection, the source electrode of the first insulated gate bipolar transistor is connected the positive pole of batteries 1 with the tie point of the drain electrode of the second insulated gate bipolar transistor by inductance, the grid of described the first insulated gate bipolar transistor and the first insulated gate bipolar transistor is connected with accumulator cell charging and discharging control module 3 respectively.Described DC/DC translation circuit 2 is realized the two-way flow of energy, by bus, flowing to storage battery 1 is charging process, by storage battery 1, flowing to bus is discharge process, in fact the implementation procedure of DC/DC translation circuit 2 is exactly the process of the mutual execution of Buck, Boost circuit, and the mode of its execution is mainly that the break-make situation by the IGBT switching device in DC/DC translation circuit 2 decides.The effect of diode D1, D2 is protection IGBT, prevents that IGBT from damaging because of high pressure.
Accumulator cell charging and discharging control module 3 inclusion test circuit 4, pulse generating circuit 5, pi regulator 6, two-way DC/DC converter controller 7 and protective circuit 8, the bus voltage signal that described testing circuit 4 detects and battery condition signal, the various status signals of system and fault-signal that protective circuit 8 detects send respectively two-way DC/DC converter controller 7 to, two-way DC/DC converter controller 7 sends signal to by pi regulator 6 and pulse generating circuit 5 grid of the first insulated gate bipolar transistor and the second insulated gate bipolar transistor in DC/DC translation circuit 2 successively.
Testing circuit 4 comprises busbar voltage testing circuit, side voltage detecting circuit, current detection circuit, capacity detection circuit and temperature sensing circuit, described busbar voltage testing circuit detects bus voltage signal, side voltage detecting circuit, current detection circuit, capacity detection circuit and temperature sensing circuit detect respectively side voltage signal, current signal, capacity signal and the temperature signal of batteries 1, and send the signal detecting to two-way DC/DC converter controller 7.Pulse generating circuit 5 wherein adopts integrated control chip to produce control impuls, and in the present embodiment, integrated control chip can adopt the SG1525 chip of Silicon General company.This mode almost can not need processor to participate in and work alone, and has reduced the burden of processor.The parameters such as the frequency of the pulse producing, Dead Time all can configure by peripheral circuit.Pi regulator 6 makes system eliminate steady-state error, improves without margin, can meet performance requirement.Various status signals and the fault-signal of 8 pairs of systems of protective circuit detect, and mainly comprise DC bus-bar voltage overvoltage/undervoltage, output voltage overvoltage, output current overcurrent, control board is under-voltage, power failure etc.
The two closed-loop controls of PI that two-way DC/DC converter controller 7 adopts outer voltage and current inner loop are controlled discharging and recharging of storage battery, and computing simultaneously is also processed the data that receive from testing circuit.Two-way DC/DC converter controller 7 is organized the whole running status of filling electricity generation system under parameter by Real-Time Monitoring more, judge whether each electric elements of system work in the rated range of voltage, electric current, capacity, power, when guaranteeing the normal operation of motor, utilization rate of electrical is the highest, electric energy output is the most stable, thereby determines one group of running parameter for system.The two closed-loop controls of PI as shown in Figure 3, the steps include: to determine voltage given according to batteries 1, according to voltage given Vref and Voltage Feedback Vout, through PI, calculate given value of current Iref, the electric current arranging is the maximum of given value of current, given value of current Iref and current feedback Iout send the integrated control chip SG1525 of pulse generating circuit to through pi regulator 6, produce pwm signal, when the output of pi regulator 6 is greater than control voltage corresponding to maximum duty cycle, amplitude limiter circuit is clamped at limit value by voltage signal.When system works, when charging voltage is less than voltage given Vref, Voltage loop is saturated, and given value of current value is exactly constant current charge current-order.At this moment charge-discharge system constant current charge under the effect of electric current loop, cell voltage rises gradually, and when cell voltage is greater than voltage given Vref, Voltage loop exits saturated, and given value of current Iref reduces along with the rising of cell voltage.When two-way DC/DC converter controller 7 detects charging current and is less than the shutdown electric current of setting, will send halt instruction.
Above embodiment is only explanation technological thought of the present utility model; can not limit protection range of the present utility model with this; every technological thought according to the utility model proposes, any change of doing on technical scheme basis, within all falling into the utility model protection range.

Claims (6)

1. the energy saver based on accumulator charging/discharging system, this device is connected on the bus of frequency converter, it is characterized in that: comprise batteries (1), DC/DC translation circuit (2) and accumulator cell charging and discharging control module (3), described batteries (1) connects DC/DC translation circuit (2), DC/DC translation circuit (2) is connected on the bus of frequency converter, accumulator cell charging and discharging control module (3) connects respectively batteries (1) and bus, and with the operating state of the signal controlling DC/DC translation circuit (2) that detects.
2. a kind of energy saver based on accumulator charging/discharging system according to claim 1, it is characterized in that: described DC/DC translation circuit (2) comprises inductance, the first insulated gate bipolar transistor, the second insulation bipolar transistor, the first diode and the second diode, the source electrode of the drain electrode of described the first insulated gate bipolar transistor and the second insulation bipolar transistor is connected on bus, the source electrode of the second insulated gate bipolar transistor is also connected with the negative pole of batteries (1), described the first diode and the first insulated gate bipolar transistor reverse parallel connection, described the second diode and the second insulated gate bipolar transistor reverse parallel connection, the source electrode of the first insulated gate bipolar transistor is connected the positive pole of batteries (1) with the tie point of the drain electrode of the second insulated gate bipolar transistor by inductance, the grid of described the first insulated gate bipolar transistor and the first insulated gate bipolar transistor is connected with accumulator cell charging and discharging control module (3) respectively.
3. a kind of energy saver based on accumulator charging/discharging system according to claim 1, it is characterized in that: described accumulator cell charging and discharging control module (3) inclusion test circuit (4), pulse generating circuit (5), pi regulator (6), two-way DC/DC converter controller (7) and protective circuit (8), the bus voltage signal that described testing circuit (4) detects and battery condition signal, the various status signals of system and fault-signal that protective circuit (8) detects send respectively two-way DC/DC converter controller (7) to, two-way DC/DC converter controller (7) sends signal to by pi regulator (6) and pulse generating circuit (5) grid of the first insulated gate bipolar transistor and the second insulated gate bipolar transistor in DC/DC translation circuit (2) successively.
4. a kind of energy saver based on accumulator charging/discharging system according to claim 3, it is characterized in that: described testing circuit (4) comprises busbar voltage testing circuit, side voltage detecting circuit, current detection circuit, capacity detection circuit and temperature sensing circuit, described busbar voltage testing circuit detects bus voltage signal, side voltage detecting circuit, current detection circuit, capacity detection circuit and temperature sensing circuit detect respectively the side voltage signal of batteries (1), current signal, capacity signal and temperature signal, and send the signal detecting to two-way DC/DC converter controller (7).
5. a kind of energy saver based on accumulator charging/discharging system according to claim 3, is characterized in that: described pulse generating circuit (5) adopts integrated control chip to produce control impuls.
6. a kind of energy saver based on accumulator charging/discharging system according to claim 1, is characterized in that: described batteries (1) is in series by least 2 lead acid accumulators.
CN201320556701.4U 2013-09-09 2013-09-09 Energy-saving apparatus based on storage battery charge and discharge system Expired - Fee Related CN203456906U (en)

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CN201320556701.4U CN203456906U (en) 2013-09-09 2013-09-09 Energy-saving apparatus based on storage battery charge and discharge system

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105576776A (en) * 2016-03-08 2016-05-11 武汉瑞源电力设备有限公司 Lithium ion storage battery power and communication DC power system
CN106451707A (en) * 2016-07-04 2017-02-22 上海交通大学 Constant-current and constant-voltage controlled charging circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105576776A (en) * 2016-03-08 2016-05-11 武汉瑞源电力设备有限公司 Lithium ion storage battery power and communication DC power system
CN106451707A (en) * 2016-07-04 2017-02-22 上海交通大学 Constant-current and constant-voltage controlled charging circuit

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140226

Termination date: 20150909

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