CN202334409U - Mine dual-output transducer - Google Patents
Mine dual-output transducer Download PDFInfo
- Publication number
- CN202334409U CN202334409U CN2011204466712U CN201120446671U CN202334409U CN 202334409 U CN202334409 U CN 202334409U CN 2011204466712 U CN2011204466712 U CN 2011204466712U CN 201120446671 U CN201120446671 U CN 201120446671U CN 202334409 U CN202334409 U CN 202334409U
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- circuit
- frequency converter
- voltage
- dual output
- output frequency
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Abstract
The utility model relates to a mine dual-output transducer which comprises a rectifying circuit, a filtering circuit and two IGBT (insulated gate bipolar transistor) inverter circuits, wherein the filtering circuit is arranged between the rectifying circuit and the two IGBT inverter circuits and is connected with the rectifying circuit and the two IGBT inverter circuits respectively. An overvoltage and low-voltage protection circuit, a pumping protection circuit and an overcurrent protection circuit are connected between the filtering circuit and the two IGBT inverter circuits, wherein the overvoltage and low-voltage protection circuit and the overcurrent protection circuit are respectively connected with a main control module, the main control module is connected with the two IGBT inverter circuits through two IGBT drive circuits, the two IGBT inverter circuits respectively output and are connected with a motor, and the transducer is charged by an explosion-proof safety power supply. An ABB control chip is adopted for the main control module disclosed by the utility model, thereby simplifying the circuit and software design, reducing the cost and enhancing the reliability.
Description
Technical field
The utility model relates to a kind of mining dual output frequency conversion speed-adjusting system.Specifically, this product belongs to the mine-used frequency-converter field, can satisfy two-way output simultaneously separately.
Background technology
Frequency control is to develop and use the good speed regualtion of AC motor method of the impetus in recent years rapidly, and the core of RHVC is a frequency converter, and its structure and kind are a lot, but the function basically identical.See that from semiconductor device the development of external frequency converter begins to use thyristor along with the development of inversion device develops, its shortcoming is that modulating frequency is low, control is complicated, efficient is low, capacity is big, voltage is high; Complete later on control device GTO thyristor and BJT have replaced thyristor gradually; But the gain of the cut-off current of GTO thyristor is too little; Overcurrent protection is difficulty relatively, and modulating frequency is low, though can with the DC chopper and the PWM frequency converter effect of BJT assembling; But output voltage is low, and capacity is little (being no more than 460V, 400kW) also.Along with development of semiconductor, abroad having occurred with IGBT is the frequency converter of inversion device, and the saturation voltage between its collector electrode and emitter-base bandgap grading reduces greatly, thereby the loss of main circuit of converter is reduced greatly.At present, speed governing on domestic main equipment great majority adopt shifting coupling and bunchers, and such as coal-winning machine, development machine and the ribbon conveyer that the colliery is used, its speed governing major part all adopts the hydraulic type variable-speed motor, like the adjustable type fluid coupling etc.; Perhaps adopt the wire wound asynchronous motor, with the method speed governing of rotor crosstalk resistance, this mode belongs to step speed regulation, and starting current and gear shift rush of current are big, and speed governing in service is discontinuous, slides down easily, and failure rate is high.According to the present situation and the development trend of coal in China industry, mine (especially state-owned big ore deposit) fully-mechanized mining working great majority are with the leading voltage of 1140V as underground power supply system at present, and for this reason, explosion-proof frequency converter voltage is selected the 1140V electric pressure for use.Owing to do not have explosion-proof frequency converter abroad, do not have the electric pressure of 1140V yet, and be included into middle pressure to the electric pressure more than 1000V～3000V abroad; Bring certain difficulty so give the type selecting of domestic coal mine user; Add that the colliery subsurface environment is abominable, damp and coal dust existence such as methane are arranged, can not get solving because of explosion-proof heat dissipation problem eventually; Frequency converter is used under coal mine be restricted, security reliability is poor.
The utility model content
Difficulty, heat radiation difficulty and security reliability difference etc. that the utility model brings for the frequency converter type selecting to the electric pressure and the output form of existing explosion-proof frequency converter existence are stated deficiency, and the dual output mine flameproof and intrinsic safety type that a kind of control circuit is simple, reliability is high and failure rate is low, adjusting function is good frequency converter is provided.
The technical scheme of the utility model is: a kind of mining dual output frequency converter; Described frequency converter comprises commutating circuit, filter circuit and two-way IGBT inversion circuit; Filter circuit is arranged between commutating circuit and the two-way IGBT inversion circuit, and is connected with two-way IGBT inversion circuit with commutating circuit respectively; Be connected with over-and under-voltage protection loop, pump liter protection loop and overcurrent protection loop between described filter circuit and the two-way IGBT inversion circuit, wherein, over-and under-voltage protection loop is connected with the master control module respectively with current foldback circuit; Described master control module drives the loop through two-way IGBT and is connected with two-way IGBT inversion circuit, and two-way IGBT inversion circuit is exported respectively with motor and joined, and described frequency converter is through the Flameproof and intrinsically safe power supply power supply.
Preferably: described commutating circuit adopts the uncontrollable circuit of three-phase bridge.
Preferably: the three-phase inverting circuit of described IGBT inversion circuit for adopting the IGBT power component to constitute.
Preferably: described overcurrent protection loop comprises short-circuit protection circuit and current foldback circuit.
Preferably: described master control module adopts the ABB control chip, and is connected with showing to export with the keyboard input respectively.
Preferably: described Flameproof and intrinsically safe power supply is made up of anti-explosion cable, explosion-resistant enclosure, input Explosion proof joint, internal circuit and output Explosion proof joint successively, is connected to internal circuit through anti-explosion cable and input Explosion proof joint.
Preferably: described internal circuit mainly comprises fuse and input filter circuit, voltage transformation and regulating circuit, multipleization pressure-limit current-limit circuit three parts.
The beneficial effect of the utility model is: the utility model mine flameproof and intrinsic safety type AC converter is applicable to the speed regulating control that exchanges 50Hz, voltage 1140V electric power system, 2 * 315kW and following three-phase alternating-current motor; Have characteristics such as detent torque is big, start-stop is steady; Can realize functions such as under variable loads level and smooth startup of alternating current machine, speed governing, parking; Thoroughly eliminate machinery and electrical impact, prolonged mechanical service life of equipment.This frequency converter has the operating state screen display, defencive function such as overload, overvoltage, under voltage, phase shortage, overheated, earth leakage search/lockout.
Frequency converter is the two drive variable frequency devices of two quadrant, can drive two machine operation simultaneously.When multi-platform combined driving one strip-type conveyer, the power-balance between realizing many through automatic adjusting.
The utility model main circuit adopts AC-DC-AC voltage-source type frequency changer, and for simplifying the control difficulty, the rectification link has adopted the uncontrollable circuit of three-phase bridge; For the influence of the pulsation harmonic wave that reduces electric current to the inversion link, adopt voltage source shape structure, realize the filtering of intermediate link; Make it obtain comparatively level and smooth direct voltage; The main IGCT power component that adopts in the inversion link guarantees to turn on and off and have higher control efficiency, obtains desirable pulse voltage series; And the employing Flameproof and intrinsically safe power supply, security performance is good, and reliability is high.The master control module of the utility model adopts the ABB control chip, has simplified control circuit and software design, reduces cost, and improves reliability.
Description of drawings
Fig. 1 is the theory diagram of the utility model
Fig. 2 is the schematic diagram in the utility model specific embodiment over-and under-voltage protection loop.
Embodiment
Embodiment below in conjunction with description of drawings the utility model:
The utility model specific embodiment shown in Fig. 1 to 2: a kind of mining dual output frequency converter; Described frequency converter comprises commutating circuit, filter circuit and two-way IGBT inversion circuit; Filter circuit is arranged between commutating circuit and the two-way IGBT inversion circuit, and is connected with two-way IGBT inversion circuit with commutating circuit respectively; Be connected with over-and under-voltage protection loop, pump liter protection loop and overcurrent protection loop between described filter circuit and the two-way IGBT inversion circuit, wherein, over-and under-voltage protection loop is connected with the master control module respectively with current foldback circuit; Described master control module drives the loop through two-way IGBT and is connected with two-way IGBT inversion circuit, and two-way IGBT inversion circuit is exported respectively with motor and joined, and described frequency converter is through the Flameproof and intrinsically safe power supply power supply.Described commutating circuit adopts the uncontrollable circuit of three-phase bridge.The three-phase inverting circuit of IGBT inversion circuit for adopting the IGBT power component to constitute.The overcurrent protection loop comprises short-circuit protection circuit and current foldback circuit.The master control module adopts the ABB control chip, and is connected with showing to export with the keyboard input respectively.Flameproof and intrinsically safe power supply is made up of anti-explosion cable, explosion-resistant enclosure, input Explosion proof joint, internal circuit and output Explosion proof joint successively; Supply power voltage from security context; Be connected to internal circuit through anti-explosion cable and input Explosion proof joint, intrinsic safety electric source input operating voltage is AC36V; Internal circuit mainly comprises fuse and input filter circuit, voltage transformation and regulating circuit, multipleization pressure-limit current-limit circuit three parts.Wherein voltage transformation and regulating circuit can be linear power supply, also can be Switching Power Supply.As be linear power supply, need elder generation through the Industrial Frequency Transformer step-down, rectifying and wave-filtering passes through linear regulating circuit more then; As be Switching Power Supply, need elder generation through rectifying and wave-filtering, switch converters carries out conversion and adjusting, again through the step-down of high frequency frequency power transformer, and then carries out rectifying and wave-filtering, just with the alternating voltage (or direct voltage) of input, converts the VD that meets the demands into; Also having a kind of is earlier through the Industrial Frequency Transformer step-down, and rectifying and wave-filtering then is again through isolating or the switch converters of non-isolation carries out exporting after the conversion.The effect of multipleization pressure-limit current-limit circuit is that voltage, the electric current exported are limited in certain scope; Fault spark energy so that output is broken down is controlled in the enough little scope; The flammable explosive gas of the unlikely hazardous environment that ignites guarantees that its output can satisfy the essential safety requirement.
Rated power 2 * the 315KW of this frequency converter, output voltage 0 is 1140V so far, and the specified input voltage 1140V of rated power 630KW, specified input current 372A, specified incoming frequency 50HZ, dual output electric current are respectively 0 to 186A, and reference frequency output 0 is to 50HZ.
Operation principle:
The overvoltage protection circuit's principle is following: given voltage is higher than sampled voltage under the normal condition, and promptly the 9 pin voltages of LM339 are greater than 8 pin voltages, and 14 pin are exported high level; Corresponding loop is not activated, and protection is failure to actuate, when having served as the voltage failure generation; Sampled voltage is greater than given voltage; The comparator output low level, light-emitting diode D41 lights, and via the 0V_OUT terminal overvoltage signal is seen off simultaneously and is transferred to corresponding treatment loop processing.
The under-voltage protection circuit's principle is following: under the normal condition, sampled voltage is higher than given voltage, comparator output high level, and when fault took place, sampled voltage was lower than given voltage, the comparator output low level, light-emitting diode D42 lights.UV_OUT is the under-voltage protecting circuit lead-out terminal; With the 0V_OUT terminal with after send interrupt signal to arrive control circuit; Be that the SET STATUS pin of delivering to SLE4520 blocks the SPWM wave pulse signal in the native system; This signal can further be delivered among the CPU and further handle, and comprises Interrupt Process and fault demonstration etc.
Pump rises the protection loop: when motor is in the regenerative braking state, when motor feeds back to DC loop with the electric energy of regenerating, can produce the pump up voltage, this moment, pump liter protection circuit controls pump up voltage and energy thereof discharged, thereby protected the element in the inverter.
The overcurrent protection loop: overcurrent protection comprises short circuit and overcurrent protection; When control circuit or driving loop misoperation, all can cause the straight-through short trouble of the wall of bridge up and down of inverter, the short circuit overcurrent can cause the damage of elements such as IGBT through the inversion device; Output through overcurrent protection loop locking signal in official hour; Inverter is quit work, make the preceding mains switch tripping operation of input side rectification simultaneously, thus the element in the protection inverter.
The above embodiment that lifts only uses to conveniently illustrating the utility model, and at the said technical scheme category of the utility model, the person of ordinary skill in the field does various simple deformation and modification, all should be included in the above claim.
Claims (7)
1. mining dual output frequency converter; It is characterized in that: described frequency converter comprises commutating circuit, filter circuit and two-way IGBT inversion circuit; Filter circuit is arranged between commutating circuit and the two-way IGBT inversion circuit, and is connected with two-way IGBT inversion circuit with commutating circuit respectively; Be connected with over-and under-voltage protection loop, pump liter protection loop and overcurrent protection loop between described filter circuit and the two-way IGBT inversion circuit, wherein, over-and under-voltage protection loop is connected with the master control module respectively with current foldback circuit; Described master control module drives the loop through two-way IGBT and is connected with two-way IGBT inversion circuit, and two-way IGBT inversion circuit is exported respectively with motor and joined, and described frequency converter is through the Flameproof and intrinsically safe power supply power supply.
2. mining dual output frequency converter as claimed in claim 1 is characterized in that: described commutating circuit adopts the uncontrollable circuit of three-phase bridge.
3. mining dual output frequency converter as claimed in claim 1 is characterized in that: the three-phase inverting circuit of described IGBT inversion circuit for adopting the IGBT power component to constitute.
4. mining dual output frequency converter as claimed in claim 1 is characterized in that: described overcurrent protection loop comprises short-circuit protection circuit and current foldback circuit.
5. mining dual output frequency converter as claimed in claim 1 is characterized in that: described master control module adopts the ABB control chip, and is connected with showing to export with the keyboard input respectively.
6. mining dual output frequency converter as claimed in claim 1; It is characterized in that: described Flameproof and intrinsically safe power supply is made up of anti-explosion cable, explosion-resistant enclosure, input Explosion proof joint, internal circuit and output Explosion proof joint successively, is connected to internal circuit through anti-explosion cable and input Explosion proof joint.
7. mining dual output frequency converter as claimed in claim 6 is characterized in that: described internal circuit mainly comprises fuse and input filter circuit, voltage transformation and regulating circuit, multipleization pressure-limit current-limit circuit three parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204466712U CN202334409U (en) | 2011-11-14 | 2011-11-14 | Mine dual-output transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204466712U CN202334409U (en) | 2011-11-14 | 2011-11-14 | Mine dual-output transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202334409U true CN202334409U (en) | 2012-07-11 |
Family
ID=46446373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204466712U Expired - Lifetime CN202334409U (en) | 2011-11-14 | 2011-11-14 | Mine dual-output transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202334409U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104795971A (en) * | 2015-04-30 | 2015-07-22 | 山西泓诚伟业科技有限公司 | Mine high power medium voltage explosion-proof frequency converter |
| EP3026813A1 (en) * | 2014-11-26 | 2016-06-01 | ABB Technology Oy | Frequency converter |
| CN114079406A (en) * | 2021-06-18 | 2022-02-22 | 东风汽车集团股份有限公司 | Motor controller assembly structure and equipment |
-
2011
- 2011-11-14 CN CN2011204466712U patent/CN202334409U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3026813A1 (en) * | 2014-11-26 | 2016-06-01 | ABB Technology Oy | Frequency converter |
| CN104795971A (en) * | 2015-04-30 | 2015-07-22 | 山西泓诚伟业科技有限公司 | Mine high power medium voltage explosion-proof frequency converter |
| CN114079406A (en) * | 2021-06-18 | 2022-02-22 | 东风汽车集团股份有限公司 | Motor controller assembly structure and equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 266400 2299 Hai Xi Road, Huangdao District, Qingdao, Shandong Patentee after: Huaxia Tianxin intellectual property Limited by Share Ltd Address before: 266400 No. 176 Haixi Road, Jiaonan economic and Technological Development Zone, Qingdao, Shandong Patentee before: Qingdao Tianxin Electric Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120711 |
|
| CX01 | Expiry of patent term |