CN202663353U - Alternating-current speed regulation system suitable for mine fan - Google Patents
Alternating-current speed regulation system suitable for mine fan Download PDFInfo
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- CN202663353U CN202663353U CN2012200421191U CN201220042119U CN202663353U CN 202663353 U CN202663353 U CN 202663353U CN 2012200421191 U CN2012200421191 U CN 2012200421191U CN 201220042119 U CN201220042119 U CN 201220042119U CN 202663353 U CN202663353 U CN 202663353U
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- asynchronous motor
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- alternating
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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
- Y02E40/30—Reactive power compensation
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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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Abstract
The utility model discloses an alternating-current speed regulation system suitable for a mine fan, comprising an alternating-current excitation power supply, a wound-rotor asynchronous motor, a digital control system and an A/D (analogue/digital) sampling module, wherein the wound-rotor asynchronous motor comprises a three-phase stator and a three-phase rotor, and the three-phase stator of the wound-rotor asynchronous motor is directly connected with a three-phase power grid; the input side of the alternating-current excitation power supply is connected with the three-phase power grid, and the output side of the alternating-current excitation power supply is connected with the three-phase rotor of the wound-rotor asynchronous motor, and used for realizing variable-frequency speed regulation at the rotor side of the wound-rotor asynchronous motor; the digital control system is connected with the alternating-current excitation power supply and the A/D sampling module respectively, and used for controlling the wound-rotor asynchronous motor to realize closed-loop control on a moor rotational speed according to the data acquired by the A/D sampling module, and sending a trigger pulse signal; and the A/D sampling module is used for acquiring the current signal, the voltage signal and the rotational speed signal of the wound-rotor asynchronous motor. The alternating-current speed regulation system disclosed by the utility model has the advantages of being small in frequency converter capacity, low in cost, high in input power factor and low in harmonic content.
Description
Technical field
The utility model relates to mine hoist fan frequency conversion governing system application, relates in particular to a kind of Alternating Current Governor System that is applicable to mine fan.
Background technology
Blower fan is a kind of important slewing in the coal production.At present, the mode that is applied to mine hoist Fan Regulation air quantity mainly contains controlling opening of valve, high-voltage frequency conversion and speed-adjusting and tandem control etc.By controlling opening of valve regulate the air quantity meeting so that the energy consumption about 30% on control valve, this is a kind of highly energy-consuming, control method of poor benefits.High-voltage frequency conversion and speed-adjusting is a kind of mode of speed regulation that applies in recent years in the mine fan, and this mode belongs to the stator side converter technique, and the capacity of frequency converter is larger, and cost is high; Tandem control belongs to the rotor-side converter technique, and the capacity of frequency converter is less, saves cost.But there are the shortcomings such as power factor is low, harmonic content is large in traditional tandem control.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of Alternating Current Governor System that is applicable to mine fan is provided, and is a kind of mine fan rotor side frequency conversion speed-adjusting system based on matrix converter.
For achieving the above object, the utility model provides a kind of Alternating Current Governor System that is applicable to mine fan, comprise: ac excitation power supply, wire-wound asynchronous motor, numerical control system and A/D sampling module, wire-wound asynchronous motor comprises threephase stator and three-phase rotor, and the threephase stator of wire-wound asynchronous motor directly links to each other with three phase network; The ac excitation power supply input side links to each other with three phase network, and outlet side links to each other with the three-phase rotor of wire-wound asynchronous motor, in order to realize the rotor-side frequency control of wire-wound asynchronous motor; Electric current, voltage and the tach signal of A/D sampling module in order to gather wire-wound asynchronous motor; Numerical control system is connected with the A/D sampling module with ac excitation power supply respectively, in order to carry out vector calculus according to the data of A/D sampling module collection, and send start pulse signal to exchanging field power supply, thereby the control ac excitation power supply provides the power supply of changeable frequency for the wire-wound asynchronous motor rotor-side, realizes the wire-wound asynchronous motor frequency control.
According to the described Alternating Current Governor System that is applicable to mine fan of the utility model preferred embodiment, above-mentioned ac excitation power supply adopts matrix converter, and it comprises 9 bidirectional switchs, and each bidirectional switch is formed by two IGBT inverse parallels.
The beneficial effects of the utility model are: compared to traditional high-voltage variable-frequency and variable-speed system based on stator side, the utility model adopts the frequency conversion speed-adjusting system based on rotor-side not have intermediate dc energy storage link and input transformer, therefore be easy to the system integration, power density is high, and system cost is low; And compared to traditional tandem control, ac excitation power supply of the present utility model adopts matrix converter, and its energy can two-way flow, and input power factor is high, and harmonic content is little.Therefore, compared with prior art, the utlity model has the advantage that frequency inverter capacity is little, with low cost, input power factor is high and harmonic content is little.
Description of drawings
Fig. 1 is a kind of topology diagram that is applicable to the Alternating Current Governor System of mine fan of the utility model;
Fig. 2 is the structure principle chart of the ac excitation power supply of the utility model embodiment;
Fig. 3 is the theory diagram of the numerical control system of the utility model embodiment.
Embodiment
Explain in detail a kind of structure and principle that is applicable to the Alternating Current Governor System of mine fan that the utility model patent provides below in conjunction with accompanying drawing.
See also Fig. 1, a kind of Alternating Current Governor System that is applicable to mine fan, comprise: ac excitation power supply 1, wire-wound asynchronous motor 2, numerical control system 3 and A/D sampling module 4, wire-wound asynchronous motor 2 comprises threephase stator and three-phase rotor, and the threephase stator of wire-wound asynchronous motor 2 directly links to each other with three phase network 5; The input side of ac excitation power supply 1 links to each other with three phase network 5, and outlet side links to each other with the three-phase rotor of wire-wound asynchronous motor 2, in order to realize the rotor-side frequency control of wire-wound asynchronous motor 2; Electric current, voltage and the tach signal of A/D sampling module 4 in order to gather wire-wound asynchronous motor 2, it further comprises input voltage detection circuit, output current detection circuit.Numerical control system 3 is connected with the A/D sampling module with ac excitation power supply 1 respectively and is connected, carry out vector calculus in order to the data that gather according to A/D sampling module 4, and send start pulse signal to exchanging field power supply 1, thereby control ac excitation power supply 1 provides the power supply of changeable frequency for the rotor-side of wire-wound asynchronous motor 2, realizes wire-wound asynchronous motor 2 frequency controls.
Please again referring to Fig. 2, ac excitation power supply 1 adopts matrix converter, and it comprises 9 bidirectional switchs, and each bidirectional switch is formed by two IGBT inverse parallels.9 bidirectional switchs form 3 * 3 arrays, and a side three-phase input end of array links to each other with three phase network 5 by Three-phase electric-wave filter, and the three-phase output end of opposite side links to each other with the three-phase rotor of wire-wound asynchronous motor 2.
As shown in Figure 3, it is the theory diagram of the numerical control system of the utility model embodiment.Numerical control system 3 comprises control system and the pulsed triggering circuit that is comprised of DSP, FPGA.In the present embodiment, in order to reduce the computational burden of DSP, DSP only is responsible for the realization of Electric Machine Control algorithm in the control circuit of this paper design, and sends to FPGA through address bus and data/address bus the action time of each switch that will calculate.And FPGA mainly finishes the collection of A/D sampling, digital I/O, code device signal, output and four step of matrix converter commutation strategy and the pulse-triggered function of D/A signal.Wherein, DSP adopts the high performance TMS320F2812 chip of TI company, TMS320F2812 be TI company for the digital signal processor of the digital control exploitation of motor, have powerful operational capability, its highest running speed can reach 150MIPS.The SPARTAN3 Series FPGA chip XC3S50AN that this patent adopts XILINX company to produce, this chip has following characteristics: logical resource is abundant, has 50,000 gate logic unit, 54k ram in slice, maximum 108 programmable I/O mouths; Processing speed is fast, and system clock reaches as high as 300MHz; Have in-chip FLASH, do not need the exterior arrangement chip, security performance is good; Support the JTAG programming mode, exploitation is convenient.
Below describe operation principle of the present utility model in detail: at first, control system 3 is derived a series of magnetic linkage equations by the equivalent electric circuit of wire-wound asynchronous motor 2, comprises stator magnetic linkage, air gap flux linkage, rotor flux, wherein air gap flux linkage is the bridge of connecting stator and rotor.Then, by synchronous rotation transformation, can be to be similar to torque current component and the field supply component of DC generator under the synchronous rotating frame with the equivalence of magnetic linkage equation, thereby realize decoupling zero control, accelerate the response speed of system.Finally by crossing the synchronous rotary inverse transformation, produce three-phase alternating current and remove to control wire-wound asynchronous motor 2 by ac excitation power supply 1 again, just obtained good speed adjusting performance.When system moves, by electric current, voltage and the tach signal of A/D sampling module 4 Real-time Collection wire-wound asynchronous motors 2, and be sent to numerical control system 3, numerical control system 3 carries out real-time speed regulating according to those signals to wire-wound asynchronous motor 2 to be processed.The principle of vector control that this system adopts is similar with traditional Vector Control System of Induction Motor, but be different from traditional Vector Control System of Induction Motor, traditional Vector Control System of Induction Motor with rotor flux as directed magnetic linkage, and this system is because by rotor-side realization frequency control, so its directed magnetic linkage is stator magnetic linkage.
The beneficial effects of the utility model are: compared to traditional high-voltage variable-frequency and variable-speed system based on stator side, the utility model adopts the frequency conversion speed-adjusting system based on rotor-side not have intermediate dc energy storage link and input transformer, therefore be easy to the system integration, power density is high, and system cost is low; And compared to traditional tandem control, ac excitation power supply of the present utility model adopts matrix converter, and its energy can two-way flow, and input power factor is high, and harmonic content is little.Therefore, compared with prior art, the utlity model has the advantage that frequency inverter capacity is little, with low cost, input power factor is high and harmonic content is little.
The above, it only is better embodiment of the present utility model, be not that the utility model is done any pro forma restriction, any content that does not break away from technical solutions of the utility model, according to any simple modification, equivalent variations and the modification that technical spirit of the present utility model is done above embodiment, all belong to the scope of technical solutions of the utility model.
Claims (2)
1. Alternating Current Governor System that is applicable to mine fan, it is characterized in that, comprise: ac excitation power supply, wire-wound asynchronous motor, numerical control system and A/D sampling module, described wire-wound asynchronous motor comprises threephase stator and three-phase rotor, and the threephase stator of described wire-wound asynchronous motor directly links to each other with three phase network; Described ac excitation power supply input side links to each other with three phase network, and outlet side links to each other with the three-phase rotor of described wire-wound asynchronous motor, in order to realize the rotor-side frequency control of described wire-wound asynchronous motor; Electric current, voltage and the tach signal of described A/D sampling module in order to gather described wire-wound asynchronous motor; Described numerical control system is connected with the A/D sampling module with ac excitation power supply respectively, in order to carry out vector calculus according to the data of A/D sampling module collection, and send start pulse signal to exchanging field power supply, thereby the control ac excitation power supply provides the power supply of changeable frequency for the wire-wound asynchronous motor rotor-side, realizes the wire-wound asynchronous motor frequency control.
2. the Alternating Current Governor System that is applicable to mine fan as claimed in claim 1 is characterized in that: described ac excitation power supply adopts matrix converter, and it comprises 9 bidirectional switchs, and each bidirectional switch is formed by two IGBT inverse parallels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200421191U CN202663353U (en) | 2012-02-09 | 2012-02-09 | Alternating-current speed regulation system suitable for mine fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200421191U CN202663353U (en) | 2012-02-09 | 2012-02-09 | Alternating-current speed regulation system suitable for mine fan |
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| CN202663353U true CN202663353U (en) | 2013-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200421191U Expired - Fee Related CN202663353U (en) | 2012-02-09 | 2012-02-09 | Alternating-current speed regulation system suitable for mine fan |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751938A (en) * | 2012-02-09 | 2012-10-24 | 上海交通大学 | Alternating current speed regulating system suitable for mine ventilator |
| CN103925951A (en) * | 2014-04-24 | 2014-07-16 | 中煤科工集团重庆研究院有限公司 | Method for monitoring air quantity passing through fan controlled by frequency converter on line |
-
2012
- 2012-02-09 CN CN2012200421191U patent/CN202663353U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751938A (en) * | 2012-02-09 | 2012-10-24 | 上海交通大学 | Alternating current speed regulating system suitable for mine ventilator |
| CN102751938B (en) * | 2012-02-09 | 2015-10-14 | 上海交通大学 | A kind of Alternating Current Governor System being applicable to mine fan |
| CN103925951A (en) * | 2014-04-24 | 2014-07-16 | 中煤科工集团重庆研究院有限公司 | Method for monitoring air quantity passing through fan controlled by frequency converter on line |
| CN103925951B (en) * | 2014-04-24 | 2016-08-24 | 中煤科工集团重庆研究院有限公司 | Method for monitoring air quantity passing through fan controlled by frequency converter on line |
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| Date | Code | Title | Description |
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| 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: 20130109 Termination date: 20180209 |