CN203205887U - Mining four-quadrant frequency converter - Google Patents
Mining four-quadrant frequency converter Download PDFInfo
- Publication number
- CN203205887U CN203205887U CN2012206850059U CN201220685005U CN203205887U CN 203205887 U CN203205887 U CN 203205887U CN 2012206850059 U CN2012206850059 U CN 2012206850059U CN 201220685005 U CN201220685005 U CN 201220685005U CN 203205887 U CN203205887 U CN 203205887U
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- frequency converter
- mining
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- contactor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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- Control Of Ac Motors In General (AREA)
Abstract
The utility model belongs to the field of frequency converters, and particularly relates to a speed-adjustable energy-saving mining four-quadrant frequency converter. The mining four-quadrant frequency converter comprises a main disconnector which controls the switching of the frequency converter; the main disconnector is connected with a vacuum alternating-current contactor; the vacuum alternating-current contactor is connected with a power converter; the power converter is connected with a converter control unit which controls the power converter; and an energy feedback electric reactor is arranged between the vacuum alternating-current contactor and the power converter. The mining four-quadrant frequency converter further comprises an explosion-proof casing used for loading the main disconnector, the vacuum alternating-current contactor, the power converter, the converter control unit and the energy feedback electric reactor; and a heat dissipation system used for cooling the power converter is arranged at the exterior of the explosion-proof casing. The mining four-quadrant frequency converter has a speed-adjustable property, and has functions such as over-voltage/under-voltage protection, overload protection, short circuit protection, overload protection and earth leakage lockout, and can realize energy two-way flow, and return the energy of a motor feedback system to a power grid.
Description
Technical field
The utility model belongs to the frequency converter field, particularly a kind of adjustable speed and energy-conservation mining four-quadrant frequency converter.
Background technology
Along with the integration and upgrade of country to the colliery, the output in single colliery is increasing, its fully-mechanized mining working, the power of motor that tape transport system uses is also increasing, motor across-the-line starting electric current is big on the one hand, and electrical network is caused very big impact, and falling appears in power supply, influence other equipment and normally move, have a strong impact on power supply safety and electric power system reliability.On the other hand, motor in the equipment will satisfy the normal operation of this equipment under various operating modes, the power of motor of adapted generally all is according to selecting under peak work capacity, and in a large amount of production processes, its power requirement often is under the upset condition, under the constant speed driving style, also can only when low-power requirements, use high power to drag, i.e. so-called " low load with strong power ", can't carry out the coupling balance of power draw and actual power demand, this is in light running with regard to causing a large amount of motor, and utilization rate of electrical is low, and waste electric energy phenomenon is serious.At present, the main equipment in colliery, for example coal-winning machine, development machine and ribbon conveyer, the most of fluid coupling that adopts of its speed governing, perhaps by the speed governing of rotor serializer circuit method, the former is difficult in maintenance, and the latter be step speed regulation, and starting current and the rush of current of shifting gears are big.
Frequency control is current main speed regualtion of AC motor method, motor starts by frequency converter, can reduce starting current, minimizing is to the impact of electrical network, mechanical shock own also reduces greatly, be conducive to improve the life-span of motor, and can realize regulating motor speed according to field demand, reach energy-saving effect.Along with the prolongation of tape transport system, increasing multimachine drive system, frequency converter can be realized multimachine synchronous initiation and power-balance easily, needs especially to use frequency converter to control at some special occasions (following fortune belt).
In the prior art, frequency conversion control technique is in the industrial circle extensive use, practice proves that also it has remarkable advantages than other control mode, and a large amount of belt conveyers is arranged in the colliery, the scraper plate machine, blower fan, equipment such as water pump and winch all requires varying load operation and soft start/stop, these all need converter technique to realize, but because the colliery industry has the particularity of requirement of explosion proof, common frequency converter can't directly be used under the coal mine, in addition, variable frequency control need adopt the high-power electric semiconductor device as rectification and inversion element, and heat dissipation problem also hinders its application under coal mine.
Summary of the invention
The utility model is at the deficiencies in the prior art; designed a kind of adjustable speed; have functions such as overvoltage/undervoltage protection, overload protection, short-circuit protection, overload protection, earth leakage search/lockout; and can realize the two-way flow of energy, the energy of motor feedback system is sent back to the mining four-quadrant frequency converter of electrical network.
The utility model is achieved through the following technical solutions:
Mining four-quadrant frequency converter, it comprises the main isolating switch of control frequency converter break-make, described main isolating switch is connected with the vacuum A.C. contactor, described vacuum A.C. contactor and power inverter, be connected with the convertor controls unit to its control on the power inverter, it is characterized in that: between vacuum A.C. contactor and power inverter, be provided with energy feedback reactor, also comprise for loading main isolating switch, the vacuum A.C. contactor, power inverter, the explosion-resistant enclosure of convertor controls unit and energy feedback reactor, explosion-proof casing also are provided with the cooling system that power inverter is cooled off outward.
Also be provided with power-supply filter and input reactance device between described main isolating switch and the vacuum A.C. contactor.
Also comprise a second control system that is connected with the convertor controls unit with the vacuum A.C. contactor, second control system comprises the DPS control module, the DSP control module is connected with the current sensor of size of current in the testing circuit and the temperature sensor of detection power converter temperature, and described DSP control module also is connected with the display module of demonstration information.
Described cooling system comprises the heat exchanger that is connected with power inverter, and the pipeline that heat exchanger is connected with power inverter is provided with water pump, and described heat exchanger also is connected with the cooling fan that improves radiating rate.
In sum, the mining four-quadrant frequency converter that the utility model proposes, have variable frequency starting, stop, speed governing and four quadrant running function realize the control of number of different types equipment such as adhesive tape conveyor, mine hoist, water pump and have good energy-saving effect.Possess defencive functions such as overload, the phase failure, short circuit, overvoltage, under-voltage, overheated, outage self-starting, simultaneously by the control to power inverter, can adjust the power factor of input side on the one hand, eliminate the harmonic pollution to electrical network; The energy that electromotor feedback can be produced is counter on the other hand utilizes after delivering to electrical network again, reaches energy-saving effect completely.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described further.
Fig. 1 is the block diagram of formation of the present utility model.
1 is main isolating switch among the figure, and 2 is power-supply filter, and 3 is the input reactance device, 4 is the vacuum A.C. contactor, 5 is energy feedback reactor, and 6 is power inverter, and 7 is out put reactor, 8 is explosion-resistant enclosure, 9 is the convertor controls unit, and 10 is second control system, and 11 is water pump, 12 is heat exchanger, and 13 is cooling fan.
Embodiment
Mining four-quadrant frequency converter as shown in Figure 1, it comprises the main isolating switch 1 of control frequency converter break-make, when the vacuum A.C. contactor is out of control, can manual-lock master isolating switch, guarantee that frequency converter can not damage because electric current is excessive, described main isolating switch 1 is connected with vacuum A.C. contactor 4, described vacuum A.C. contactor 4 and power inverter 6, be connected with the convertor controls unit 9 to its control on the power inverter 6, it is characterized in that: between vacuum A.C. contactor 4 and power inverter 6, be provided with energy feedback reactor 5, energy feedback reactor 5 is in the electronic following energy storage effect that plays, form sinusoidal current waveform, during feedback, energy feedback reactor strobes, filter the radio-frequency component in the feedback electric current, also comprise for loading main isolating switch, the vacuum A.C. contactor, power inverter, the explosion-resistant enclosure 8 of convertor controls unit and energy feedback reactor, the explosion-proof casing 8 outer cooling systems that power inverter is cooled off that also are provided with.
Also be provided with power-supply filter 2 and input reactance device 3 between described main isolating switch 1 and the vacuum A.C. contactor 4, power-supply filter for reducing frequency converter because of the electromagnetic interference of harmonic wave to electrical network, the input reactance device is used for suppressing the harmonic current of frequency converter input side, improves power factor.
Also comprise a second control system 10 that is connected with convertor controls unit 8 with vacuum A.C. contactor 4, second control system comprises the DPS control module, the DSP control module is connected with the temperature sensor that is of the current sensor of size of current in the testing circuit and detection power converter temperature, and described DSP control module also is connected with the display module of demonstration information.Whether the current sensor that arranges is excessive and feed back to the DSP control module for detection of the electric current in the circuit, when electric current is excessive, the DSP control module can drive the vacuum A.C. contactor and disconnect, temperature sensor is for detection of the temperature of power inverter, when temperature was too high, the DSP control module also can be controlled the vacuum A.C. contactor and disconnect.
Described cooling system comprises the heat exchanger 12 that is connected with power inverter, the pipeline that heat exchanger 12 is connected with power inverter 6 is provided with water pump 11, water pump 11 drives circulation fluid and flows in the substrate of installation power converter, thereby power inverter is cooled off, described heat exchanger also is connected with the cooling fan 13 that improves radiating rate, cooling fan can increase the speed air flow of heat-exchanger surface, improve the radiating rate of heat exchanger, further improve radiating effect.
In sum, the mining four-quadrant frequency converter that the utility model proposes, have variable frequency starting, stop, speed governing and four quadrant running function realize the control of number of different types equipment such as adhesive tape conveyor, mine hoist, water pump and have good energy-saving effect.Possess defencive functions such as overload, the phase failure, short circuit, overvoltage, under-voltage, overheated, outage self-starting, can the energy that motor stops to produce be absorbed by energy feedback reactor simultaneously, and feed back to electrical network, realized energy-conservation effect; By the control to power inverter, can adjust the power factor of input side on the one hand simultaneously, eliminate the harmonic pollution to electrical network; The energy that electromotor feedback can be produced is counter on the other hand utilizes after delivering to electrical network again, reaches energy-saving effect completely.
Claims (4)
1. mining four-quadrant frequency converter, it comprises the main isolating switch of control frequency converter break-make, described main isolating switch is connected with the vacuum A.C. contactor, described vacuum A.C. contactor and power inverter, be connected with the convertor controls unit to its control on the power inverter, it is characterized in that: between vacuum A.C. contactor and power inverter, be provided with energy feedback reactor, also comprise for loading main isolating switch, the vacuum A.C. contactor, power inverter, the explosion-resistant enclosure of convertor controls unit and energy feedback reactor, explosion-proof casing also are provided with the cooling system that power inverter is cooled off outward.
2. mining four-quadrant frequency converter according to claim 1 is characterized in that: also be provided with power-supply filter and input reactance device between described main isolating switch and the vacuum A.C. contactor.
3. mining four-quadrant frequency converter according to claim 1, it is characterized in that: also comprise a second control system that is connected with the convertor controls unit with the vacuum A.C. contactor, second control system comprises the DPS control module, the DSP control module is connected with the current sensor of size of current in the testing circuit and the temperature sensor of detection power converter temperature, and described DSP control module also is connected with the display module of demonstration information.
4. mining four-quadrant frequency converter according to claim 1, it is characterized in that: described cooling system comprises the heat exchanger that is connected with power inverter, the pipeline that heat exchanger is connected with power inverter is provided with water pump, and described heat exchanger also is connected with the cooling fan that improves radiating rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206850059U CN203205887U (en) | 2012-12-12 | 2012-12-12 | Mining four-quadrant frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206850059U CN203205887U (en) | 2012-12-12 | 2012-12-12 | Mining four-quadrant frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203205887U true CN203205887U (en) | 2013-09-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012206850059U Expired - Fee Related CN203205887U (en) | 2012-12-12 | 2012-12-12 | Mining four-quadrant frequency converter |
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| Country | Link |
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| CN (1) | CN203205887U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105119473A (en) * | 2015-08-28 | 2015-12-02 | 洛阳中重自动化工程有限责任公司 | Explosion-proof frequency converter and method for safety interlock protection of mine hoist |
| CN109618540A (en) * | 2019-01-02 | 2019-04-12 | 深圳易能电气技术股份有限公司 | A kind of cooling system of four-quadrant frequency converter |
-
2012
- 2012-12-12 CN CN2012206850059U patent/CN203205887U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105119473A (en) * | 2015-08-28 | 2015-12-02 | 洛阳中重自动化工程有限责任公司 | Explosion-proof frequency converter and method for safety interlock protection of mine hoist |
| CN105119473B (en) * | 2015-08-28 | 2018-01-30 | 洛阳中重自动化工程有限责任公司 | Explosion-proof frequency converter and method for safety interlock protection of mine hoist |
| CN109618540A (en) * | 2019-01-02 | 2019-04-12 | 深圳易能电气技术股份有限公司 | A kind of cooling system of four-quadrant frequency converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Mining four-quadrant frequency converter Effective date of registration: 20140605 Granted publication date: 20130918 Pledgee: Jiangsu Jiangnan Rural Commercial Bank Limited by Share Ltd Pledgor: Changzhou Lianli Automation Technology Co., Ltd. Registration number: 2014990000436 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20150529 Granted publication date: 20130918 Pledgee: Jiangsu Jiangnan Rural Commercial Bank Limited by Share Ltd Pledgor: Changzhou Lianli Automation Technology Co., Ltd. Registration number: 2014990000436 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Mining four-quadrant frequency converter Effective date of registration: 20150604 Granted publication date: 20130918 Pledgee: Jiangsu Jiangnan Rural Commercial Bank Limited by Share Ltd Pledgor: Changzhou Lianli Automation Technology Co., Ltd. Registration number: 2015990000434 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| 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: 20130918 Termination date: 20171212 |