CN202872415U - Storage battery supply - Google Patents
Storage battery supply Download PDFInfo
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- CN202872415U CN202872415U CN 201220538800 CN201220538800U CN202872415U CN 202872415 U CN202872415 U CN 202872415U CN 201220538800 CN201220538800 CN 201220538800 CN 201220538800 U CN201220538800 U CN 201220538800U CN 202872415 U CN202872415 U CN 202872415U
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Abstract
The utility model relates to a storage battery supply, super large starting current will be generated when the load starts, output voltage and output frequency of a boost inversion circuit are both arranged to satisfy lowest requirements of voltage and frequency for load starting, load current rises slowly and small until rated voltage and rated frequency for load stable operation are reached, a growing rate of the starting load current is limited not to exceed a safe scope, and power devices in a circuit are protected. Because start voltage can right satisfy starting need of load, and starting voltage is much lower than stable state voltage in load operation, so starting load current can be lowered under a condition of a particular load resistance; and because starting frequency calculated by starting voltage is relatively low, rapid rise of relative movement between load motor stator and rotor becomes slow rise, output power of the motor is reduced, known load current is then decreased, so a purpose of limiting super large starting current in two aspects is obtained.
Description
Technical field
The utility model relates to a kind of clean energy resource electric power system, is specifically related to a kind of battery feed.
Background technology
Current remote mountain areas or pastoral area generate electricity to satisfy the electricity consumption needs without electric family with the control integrated machine for reverse conversion, such as wind control integrated machine for reverse conversion or photovoltaic control integrated machine for reverse conversion etc.With the electrical power storage sent of control integrated machine for reverse conversion in storage battery, after the direct current of storage battery output converts alternating current to through inverter, to electric power supply.When the motor even load of present refrigerator and the compressor of air-conditioning, microwave oven is started by inactive state, overcome the impact of the driven compressor coil of stiction and refrigerator.Start in a flash in load, because the speed of relative motion is almost 0 between motor stator and the rotor, namely do not have the motion of cutting magnetic field, just can in circuit, not produce back electromotive force; When the output voltage of storage battery is constant, ignore the effect of self-induction of loop, nearly all output voltage all has been added on the resistance of circuit, so starting current is very large, is 7～8 times of normal running current.
As shown in Figure 1; if storage battery is still exported according to steady state voltage 1 and steady frequency 2 load; the super large starting current that load current 3 will form 7～8 times of nominal load current causes the inverter startup overcurrent protection that is connected with storage battery; cause instantaneous the falling of output voltage of storage battery; cause again the inverter startup low-voltage variation, the overcurrent protection of frequent starting and low-voltage variation finally cause the availability of whole electric power system to reduce.
In the prior art method for limiting of super large starting current mainly comprised: 1, thermistor method, such as application for a patent for invention-transient current buffering suppresser (publication number: be exactly by series thermal-sensitive resistance in circuit CN101335451), if have larger super large starting current to produce in load by static moment to starting, thermistor can be with the super large inrush current limitation within rated range; But the shortcoming of thermistor method is, thermistor needs certain hour could arrive the operating state resistance value during startup, thermistor also needs certain cooling time that resistance is elevated to normal-temperature in order to start next time when closing, if motor cuts out rear horse back unlatching like this, thermistor does not also turn cold, and this has just lost restriction to the super large starting current.
2, Industrial Frequency Transformer method, the power-frequency voltage device of between control integrated machine for reverse conversion and electrical appliance, connect, when the compressor in the circuit, when electric motor starting produces the super large starting current, Industrial Frequency Transformer makes output voltage decline, but output frequency remains unchanged.Although reduce to some extent with respect to the super large starting current in the situation of steady state voltage, do not change the speed of motor load, thereby the super large starting current is still larger.
Summary of the invention
The utility model has proposed the super large starting current that the load of a kind of energy establishment was produced by static moment to starting for the deficiencies in the prior art, and protection power source and power device are avoided the overcurrent protection of frequent starting and the battery feed of low-voltage variation.
The technical solution of the utility model is as follows:
A kind of battery feed is characterized in that: it comprises static frequency converter, storage battery and boost inverter circuit, and wherein said storage battery is connected with boost inverter circuit and is connected; Described static frequency converter comprises signal processor, signal acquisition module and drive circuit, the input of wherein said signal acquisition module connects described boost inverter circuit input and output, and the output of described signal acquisition module connects described signal processor; The signal output part of described signal processor connects described drive circuit; The driving signal output part of described drive circuit connects the power device in the described boost inverter circuit;
Described boost inverter circuit comprises the full-bridge that boosts, high frequency transformation bridge, rectifier bridge and the inverter bridge that connects successively; The output of described drive circuit connects the power device in described boost full-bridge and the inverter bridge.
Described signal processor is digital signal processor or application-specific integrated circuit (ASIC).
The output of described inverter bridge connects a filter circuit, and described signal acquisition module gathers the voltage and current signal of described filter circuit output.
Described power device comprises CMOS pipe and/or IGBT pipe.
Technique effect of the present utility model is as follows:
When battery feed of the present utility model starts generation super large starting current in load; all be set to satisfy the voltage of load startup minimum requirements and the mode of frequency by output voltage and output frequency with boost inverter circuit; make slow, the slightly rising of load current; until rated voltage and rated frequency when reaching the load even running; the amplification of the load current when restriction starts makes it can not surpass safe range, the power device in the protective circuit.
Because take-off voltage can only satisfy the startup needs of load, and the steady state voltage of take-off voltage during than load running is much lower, can reduce the load current when starting in the certain situation of load resistance; And the take-off frequency of being calculated by take-off voltage is also lower, the motor stator of load and the relative motion between the rotor become rising by rising rapidly, the power output of motor reduces, and load current reduces immediately as can be known, reaches like this purpose of restriction super large starting current from two aspects.
Owing to the adjustment to output voltage and output frequency is recently to realize by adjusting the duty that is used for the driving power device by the signal processor with digital processing function, thereby have the advantages that response is rapid, restriction effect is good, protect power device.
Static frequency converter of the present utility model than existing thermistor method, has the advantage that can effectively limit the super large starting current that the load short, that repeatedly start of interval start-up time produces owing to adopt the said method setting.Than existing Industrial Frequency Transformer method, because the default transformer equipment of bulky the volume of whole adjuster is obviously compressed, and response speed is rapider.
Description of drawings
Fig. 1 is load by the view of static output voltage, output frequency and load current when starting
Fig. 2 is apparatus structure schematic diagram of the present utility model
The view of output voltage, output frequency and load current when Fig. 3 is generation impact electric current after adjusting through device of the present utility model
Output voltage and load current waveform when Fig. 4 is the refrigerator normal operation
Fig. 5 does not change given voltage U when being the refrigerator startup
RefWith given frequency f
Ref, output voltage and load current waveform
Fig. 6 changes given voltage U when being the refrigerator startup
RefWith given frequency f
Ref, output voltage and load current waveform
Embodiment
Below in conjunction with accompanying drawing the utility model is described.
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Specific embodiment described herein is only in order to explaining the utility model, and is not used in restriction the utility model.
As shown in Figure 1, static frequency converter 4 of the present utility model comprises signal processor 5, signal acquisition module 6 and drive circuit 7, the input of signal processor 5 connects the output of signal acquisition module 6, and output connects respectively the input of one drive circuit 7 and the input of another drive circuit 7; Wherein signal processor 5 can be Digital Signal Processing (DSP) or application-specific integrated circuit (ASIC) (ASIC) etc.Battery feed comprises static frequency converter 4, storage battery 8, boost inverter circuit, load port 10, and storage battery 8, boost inverter circuit, load port 10 connect successively; Comprise the full-bridge 91 that boosts, high frequency transformation bridge 92, rectifier bridge 93, inverter bridge 94 and the filter circuit 95 that connect successively in the boost inverter circuit.The output of one drive circuit 7 drives the power device in the full-bridge 91 that boosts, and the output of another drive circuit 7 drives the power device in the inverter bridge 94, and power device comprises CMOS pipe, IGBT pipe etc.Signal acquisition module 6 gathers respectively the voltage and current signal of busbar voltage between voltage and current signal, rectifier bridge 93 and the inverter bridge 94 of storage battery 8 outputs and current signal, filter circuit 95 outputs.
Signal acquisition module 6 is judged the voltage and current signal input signal processor 5 that collects, judge on the one hand inactive state and the starting state of load, the mode by slow increase output voltage and output frequency limits the super large starting current that produces when load starts; Judge on the other hand whether the output voltage of storage battery 8 reaches the output voltage whether dc bus current between the rated output voltage of storage battery 8, rectifier bridge 93 and the inverter bridge 94 reach rated direct current, filter circuit 95 outputs and whether reach the rated output voltage of whole battery feed, guarantees the normal operation of battery feed by the mode of FEEDBACK CONTROL.
When the output voltage U of signal acquisition module 6 in the collection of filter circuit 95 places
OutBe lower than the minimum voltage U of load running
Min, or load is when being started by inactive state.Signal processor 5 is set corresponding given voltage U
Ref, again according to current given voltage U
RefCalculate current given frequency f
Ref, f
Ref=kU
Ref+ b, wherein k, b are constant.Duty ratio in the signal processor 5 regulating command signals makes it and current given voltage U
RefCorrespondence, drive circuit 7 drives the power device of boost full-bridge 91 and inverter bridge 94 according to duty ratio, realizes the output voltage U to boost inverter circuit
OutWith output frequency f
OutAdjustment, f
Out=k*U
Out+ b, wherein k, b are constant.Make output voltage U
OutWith output frequency f
OutAlong with given voltage U
RefWith given frequency f
RefChange and change, finally reach output voltage U
Out=given voltage U
Ref, output frequency f
Out=given frequency f
Ref
As from the foregoing, when load is just started by inactive state, the speed of relative motion was almost 0 o'clock between motor stator and the rotor, and signal processor 5 is with given voltage U
RefBe set to the take-off voltage U of load
Trip, and according to the take-off voltage U
TripCalculate the take-off frequency f
TripBecause take-off voltage U trip can only satisfy the startup needs of load, and the take-off voltage U
TripThan rated voltage U
RvMuch lower, in the certain situation of load resistance, can reduce the load current I when starting
RlcAnd by the take-off voltage U
TripThe take-off frequency f of calculating
TripAlso lower, so that the output frequency f of boost inverter circuit 9
OutAlso lower, the motor stator of load and the relative motion between the rotor become rising by rising rapidly, so that stiction reduces when comparing rated frequency, the output frequency P of motor reduces, by P=I
Rlc 2R is load current I as can be known
RlcReduce immediately.More than the super large starting current that stacks up in the time of load can being started of the effect of two aspects drop to specified 2～3 times, the impact that storage battery 8 is subject to also can reduce.
As shown in Figure 3, based on above-mentioned principle, the modulator approach of signal processor 5 comprises:
1) signal acquisition module 6 detects the load current I of a certain moment boost inverter circuit 9 outputs
Rlc, and will judge in this detection signal input signal processor 5;
2) when signal processor 5 detected the load startup, signal processor 5 was with given voltage U
RefBe set to the take-off voltage U of load
Trip, and calculate in real time given voltage U
RefCorresponding given frequency f
RefAnd command signal, given frequency f
Ref=take-off frequency f
TripDrive boost inverter circuit 9 according to command signal, make boost inverter circuit 9 outputs with given voltage U
RefWith given frequency f
RefThe output voltage U that changes
OutWith output frequency f
OutWork as output voltage U
OutWith output frequency f
OutWhen all reducing, the load current I when load starts
RlcDecrease;
3) according to default linear relationship, the gradually given voltage U of lifting
Ref, and calculate in real time given voltage U
RefCorresponding given frequency f
RefAnd command signal; As seen from Figure 3, starting the super large starting current that produces is obviously dragged down;
5) when given voltage U
RefReach the steady state voltage scope of load, with given voltage U
RefRemain the rated voltage U of load
Rv, and calculate in real time given voltage U
RefCorresponding given frequency f
RefAnd command signal, at this moment given frequency f
Ref=rated frequency f
Rv
The below is above-mentioned variable frequency starting method and installs when being used for without electric family electric power system that the utility model is with respect to the remarkable result of prior art, and circuit parameter sees Table 1.
Table 1
| Sequence number | Circuit name | Device name | Specifications and |
| 1 | 5 | Signal processor | Digital signal processor (DSP) |
| 2 | 6 | Signal acquisition module | Take operational amplifier as main signal acquisition module |
| 3 | 7 | Drive circuit | Take isolating device as |
| 4 | 8 | Storage battery | 24V/200Ah |
| 5 | 91 | Bridge boosts | Power device is metal-oxide-semiconductor |
| 6 | 92 | High frequency transformer | General high frequency transformer |
| 7 | 93 | Rectifier bridge | Power device is |
| 8 | 94 | Inverter bridge | Power device is IGBT |
| 9 | 95 | Filter circuit | The combination of inductance and |
| 10 | 10 | Load port | Driving model is the refrigerator load of BC-50EN |
As shown in Figure 4, when refrigerator worked, yellow curve represented boost inverter circuit ac output voltage U
Out, green curve represents boost inverter circuit AC load electric current I
RlcThe normal working voltage of refrigerator guarantees that at 227V, running current guarantees at 0.584A.
As shown in Figure 5, in circuit, produce the super large starting current when refrigerator starts moment, do not changing given voltage U
RefWith given frequency f
RefSituation under, yellow curve represents boost inverter circuit ac output voltage U
Out, green curve represents boost inverter circuit AC load electric current I
RlcThe starting resistor of refrigerator guarantees that at 219V the super large starting current that starts the moment generation is 7.63A, is 13.1 times of running current.
As shown in Figure 6, in circuit, produce the super large starting current when refrigerator starts moment, after adjusting through method and apparatus of the present utility model, changing given voltage U
RefWith given frequency f
RefSituation under, yellow curve represents boost inverter circuit ac output voltage U
Out, green curve represents boost inverter circuit AC load electric current I
RlcAs seen from the figure, output voltage U
OutBe reduced to 116V, output frequency f
OutDrop to 21.55Hz.Starting moment super large starting current at refrigerator is 2.87A, is equivalent to do not changing given voltage U
RefWith given frequency f
RefTherefore 37.6% of Shi Chaoda starting current has effectively limited refrigerator and has started the super large starting current that moment produces.
Should be pointed out that the above embodiment can make those skilled in the art's comprehend the utility model create, and creates but limit never in any form the utility model.Therefore; although this specification is created the utility model with reference to drawings and Examples and is had been described in detail; but; those skilled in the art are to be understood that; still can create the utility model and make amendment or be equal to replacement; in a word, all do not break away from technical scheme and the improvement thereof of the spirit and scope of the utility model creation, and it all should be encompassed in the utility model and create in the middle of the protection range of patent.
Claims (4)
1. battery feed, it is characterized in that: it comprises static frequency converter, storage battery and boost inverter circuit, wherein said storage battery is connected with boost inverter circuit and is connected; Described static frequency converter comprises signal processor, signal acquisition module and drive circuit, the input of wherein said signal acquisition module connects described boost inverter circuit input and output, and the output of described signal acquisition module connects described signal processor; The signal output part of described signal processor connects described drive circuit; The driving signal output part of described drive circuit connects the power device in the described boost inverter circuit;
Described boost inverter circuit comprises the full-bridge that boosts, high frequency transformation bridge, rectifier bridge and the inverter bridge that connects successively; The output of described drive circuit connects the power device in described boost full-bridge and the inverter bridge.
2. a kind of battery feed as claimed in claim 1, it is characterized in that: described signal processor is digital signal processor or application-specific integrated circuit (ASIC).
3. a kind of battery feed as claimed in claim 1 or 2, it is characterized in that: the output of described inverter bridge connects a filter circuit, and described signal acquisition module gathers the voltage and current signal of described filter circuit output.
4. a kind of battery feed as claimed in claim 3 is characterized in that: described power device comprises CMOS pipe and/or IGBT pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220538800 CN202872415U (en) | 2012-10-19 | 2012-10-19 | Storage battery supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220538800 CN202872415U (en) | 2012-10-19 | 2012-10-19 | Storage battery supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202872415U true CN202872415U (en) | 2013-04-10 |
Family
ID=48039104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220538800 Expired - Lifetime CN202872415U (en) | 2012-10-19 | 2012-10-19 | Storage battery supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202872415U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107571875A (en) * | 2017-09-21 | 2018-01-12 | 中车大连机车研究所有限公司 | AC drive locomotive moves car servicing unit |
-
2012
- 2012-10-19 CN CN 201220538800 patent/CN202872415U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107571875A (en) * | 2017-09-21 | 2018-01-12 | 中车大连机车研究所有限公司 | AC drive locomotive moves car servicing unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Xinjiang Huaxun Technology Development Co.,Ltd. Assignor: ZK ENERGY SCIENCE & TECHNOLOGY Co.,Ltd. Contract record no.: 2014650000015 Denomination of utility model: Accumulator power supply simulation device and method Granted publication date: 20130410 License type: Exclusive License Record date: 20140609 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130410 |