CN109586649A - Flow channel type explosion-proof frequency converter - Google Patents
Flow channel type explosion-proof frequency converter Download PDFInfo
- Publication number
- CN109586649A CN109586649A CN201910056499.0A CN201910056499A CN109586649A CN 109586649 A CN109586649 A CN 109586649A CN 201910056499 A CN201910056499 A CN 201910056499A CN 109586649 A CN109586649 A CN 109586649A
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- CN
- China
- Prior art keywords
- frequency converter
- module
- explosion
- contactor
- charging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 3
- 238000007599 discharging Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 abstract 1
- 230000005494 condensation Effects 0.000 abstract 1
- 238000009833 condensation Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 230000007774 longterm Effects 0.000 abstract 1
- 239000000428 dust Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/24—Vector control not involving the use of rotor position or rotor speed sensors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The present invention relates to a kind of flow channel type explosion-proof frequency converters, are under extremely low environment applied to blowing device and long-term environment temperature, prevent condensation, solve the problems, such as traditional frequency conversion device because variation of ambient temperature causes IGBT to demolish.The present invention includes RFI filter, input reactance device, charging contactor, charging resistor, three-phase contactor, rectifier bridge module, DC bus discharge loop, filter capacitor, IGBT inversion unit and current sample sensor.The frequency converter is radiated by the cooling system of itself due to internal Blower-free, is substantially reduced volume, reduce cost, is also achieved without the green environment made an uproar, the included redundancy bypath system in inside substantially increases the reliability of system.
Description
Technical field
The present invention relates to converter technology fields, in particular to a kind of to need under the air duct of high wind speed and ultra-low temperature surroundings
Want the device of flow channel type explosion-proof variable frequency variable speed.
Background technique
With scientific and technological continuous development, there are multifunction, more structurings in frequency converter.It radiates for common frequency converter,
It is the heat that IGBT high speed turns on and off generation in very big degree, temperature raising can seriously affect IGBT performance and frequency conversion
The safety of device equally will increase cost, while environmental noise increases if increasing power of fan.Exist for common frequency converter
Installation environment under industrial application, mostly dust area, coal field, long distance delivery area etc. inevitably result in and go out inside frequency converter
The accumulation of existing dust；And for long distance delivery area, it necessarily will increase peak voltage, increase the danger of frequency converter aircraft bombing in this way
Danger.Common frequency converter is powered on, certain impact can be caused to internal rectification module and IGBT module in the moment of combined floodgate, greatly
The service life of device is reduced greatly, while in industrial environment, there is fluctuation and harmonic wave interferences and other for network voltage
Conduction Interference, often frequency converter run time fault shut down.
Summary of the invention
The drawbacks of for the prior art, the present invention are to provide a kind of flow channel type explosion-proof frequency converter, and solution is powered on without impact type,
The technical issues of power failure repid discharge, the occupied space of frequency converter is big and radiator noise is big, while reducing harmonic wave pair
The interference of frequency converter internal components improves safety and the practicability of frequency converter.
In order to solve the above technical problems, runner explosion-proof frequency converter of the present invention includes: RFI filter, input reactance device, charging
Resistance, three-phase contactor, charging contactor, rectifier bridge module, filter capacitor, discharge loop, IGBT inverter module, bypass mould
Block, current sample sensor and master board system and driving plate system.Blower-free inside the frequency converter, utilizes totally-enclosed machine
Body heat dissipation.It connects after the input side access power grid of RFI filter with input reactance device, alleviates Conduction Interference and harmonic wave interference pair
Runner frequency converter influences.Charging contactor is connected with charging resistor, and realization is powered on without impact type, reduces electromagnetism Interference, and
Reduce the impact to rectification module.
As a kind of preferred electrical architecture of the invention, the fast automatic electric discharge of busbar voltage is realized in bus discharge circuit,
Maintain easily operation.
As another preferred electrical architecture of the invention, output increases bypass module all the way, when there is module on other roads
When failure, quick automatic switching operating mode, bypass module puts into normal operating conditions, improves the reliability of frequency converter.
As a kind of flow channel type explosion-proof frequency converter that safety coefficient is high, have the function of explosion-proof, waterproof, dust protection, benefit
The heat inside frequency converter is taken away with forma fluens under wind or ultra-low temperature surroundings, therefore claims flow channel type explosion-proof frequency converter,
Have the advantages that as follows:
1, without adding blower to carry out internal heat dissipating, the weight of radiator, Blower-free noise jamming are alleviated.
2, more three-phase input detections, the detection of PN bus, output electric current measure and internal temperature real-time detection, significantly
Increase frequency converter safety.
3, frequency converter installation reduces the occupancy of terrestrial space volume with inside ventilation shaft.
4, bus places electrical circuit, busbar voltage can be discharged into safe electricity automatically by bus bar circuit while three-phase powers off
Pressure is hereinafter, prevent the danger of bus electric shock.
5. closed explosion-proof chamber has accomplished explosion-proof, waterproof, dust protection.
It is described in further detail with reference to the accompanying drawing with embodiments of the present invention.
Detailed description of the invention
Fig. 1 is the circuit diagram of flow channel type explosion-proof frequency converter of the present invention.
Fig. 2 is the perspective view of explosion-proof frequency converter internal structure shown in Fig. 1.
Fig. 3 is the perspective view of explosion-proof frequency converter external structure shown in Fig. 1.
Specific embodiment
As shown in Figure 1, three-phase power grid voltage accesses input reactance device 2 after RFI filter 1, master board system 12 is obtained
After electricity, system requirements is met by the R S T three-phase voltage of the acquisition of master board system 12 back, then main control board system 12 is given
Determining signal makes contactor KM1 coil obtain electric actuation charging contactor 5, and network voltage passes through charging resistor 3, by rectifier bridge module
Alternating current is become direct current by 6, is realized without impact type to busbar charging；Master board system 12 detects mother within the given time
Line port voltage when PN busbar voltage reaches pre-charge pressure numerical value as defined in system, then is sent by master board system 12 and is ordered
Order is attracted three-phase contactor 4, and 2s disconnects charging contactor 5 after actuation, is detecting R S T three-phase voltage simultaneously, main control
Plate system 12 gives contactor KM3 ON- and OFF- command.System electrification is completed and ready can be run at this time.
The contactor KM3 in bus discharge circuit 8 is controlled by the signal of master board system 12, and realization is powering on KM3
It disconnects, powers off KM3 automatic pick, so that bus is quickly discharged after a loss of power, facilitate operation.
After the given operation order of master board system 12, driving plate system 13, the driving of six tunnel of inverter circuit are sent a signal to
Signal controls 9 working output voltage signal of IGBT inverter module, then by passing through by 11 real-time detection of current sample sensor
PID adjusts the output of control frequency converter, achievees the purpose that speed-sensorless control algorithm.
When certain in six tunnel of inverter circuit on the way lower bridge arm IGBT module break down, pass through driving plate system 13 feed back
Signal is judged to master board system 12 by master board system 12, and original malfunctioning module work is quickly blocked with Microsecond grade
Driving signal, while malfunctioning module can be made to block automatically with manual modification inner parameter, master board system 12 sends out driving signal
It works to bypass module 10, takes over malfunctioning module and realize transition, realize and switch without impact, while external fault phase line being replaced
It is changed to X phase, is reached it is not necessary that with changing internal module, can quickly resume production power, ensure that the reliability of system.
The internal structure that Fig. 2 explosion-proof frequency converter is shown is compact, and Fig. 3 is stereoscopic figure, the miniaturization of volume and full envelope
Closing design, heat are taken out of outside cavity by metal fuselage, realize internal Blower-free, have saved cost, prevented environmental noise.
The above is only a preferred embodiment of the present invention.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the principle of the present invention, various modifications and improvements can be made, these also should be regarded as belonging to the present invention
Protection scope.
Claims (3)
1. a kind of flow channel type explosion-proof frequency converter, it is characterised in that: the converter circuit is by RFI filter (1), input reactance device
(2), charging resistor (3), three-phase contactor (4), charging contactor (5), rectifier bridge module (6), filter capacitor (7), discharge back
Road (8), IGBT inverter module (9), bypass module (10), current sample sensor (11) and master board system (12) and drive
Movable plate system (13) composition, frequency converter inside Blower-free, utilizes totally-enclosed fuselage to radiate；The input of the RFI filter (1)
It connects after flanking power grid with input reactance device (2)；The charging contactor (5) is connected with charging resistor (3).
2. explosion-proof frequency converter according to claim 1, it is characterised in that: the discharge loop (8) realizes that busbar voltage is fast
Fast automatic discharging.
3. explosion-proof frequency converter according to claim 1, it is characterised in that: output increases the bypass module (10) all the way,
When there is module failure on other roads, quick automatic switching to operating mode, bypass module (10) puts into normal operating conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910056499.0A CN109586649A (en) | 2019-01-22 | 2019-01-22 | Flow channel type explosion-proof frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910056499.0A CN109586649A (en) | 2019-01-22 | 2019-01-22 | Flow channel type explosion-proof frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109586649A true CN109586649A (en) | 2019-04-05 |
Family
ID=65917457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910056499.0A Pending CN109586649A (en) | 2019-01-22 | 2019-01-22 | Flow channel type explosion-proof frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109586649A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113873836A (en) * | 2021-09-24 | 2021-12-31 | 珠海格力电器股份有限公司 | Temperature and humidity control method and device of frequency converter, frequency converter and air conditioning unit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762826A (en) * | 2013-12-26 | 2014-04-30 | 平安电气股份有限公司 | Flow pass type mining frequency converter shell |
| CN105281642A (en) * | 2015-10-13 | 2016-01-27 | 太原惠特科技有限公司 | Mining flameproof intrinsically-safe AC variable-frequency system suitable for two-speed motor |
| CN206060613U (en) * | 2016-06-30 | 2017-03-29 | 陕西科技大学 | A kind of friendship orthogonal can bypass frequency conversion device |
| CN108649843A (en) * | 2018-05-31 | 2018-10-12 | 南京航空航天大学 | A kind of permanent magnetism starting-generating system and its control method with open circuit fault-tolerant ability |
| CN209375509U (en) * | 2019-01-22 | 2019-09-10 | 希望森兰科技股份有限公司 | Flow channel type explosion-proof frequency converter |
-
2019
- 2019-01-22 CN CN201910056499.0A patent/CN109586649A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762826A (en) * | 2013-12-26 | 2014-04-30 | 平安电气股份有限公司 | Flow pass type mining frequency converter shell |
| CN105281642A (en) * | 2015-10-13 | 2016-01-27 | 太原惠特科技有限公司 | Mining flameproof intrinsically-safe AC variable-frequency system suitable for two-speed motor |
| CN206060613U (en) * | 2016-06-30 | 2017-03-29 | 陕西科技大学 | A kind of friendship orthogonal can bypass frequency conversion device |
| CN108649843A (en) * | 2018-05-31 | 2018-10-12 | 南京航空航天大学 | A kind of permanent magnetism starting-generating system and its control method with open circuit fault-tolerant ability |
| CN209375509U (en) * | 2019-01-22 | 2019-09-10 | 希望森兰科技股份有限公司 | Flow channel type explosion-proof frequency converter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113873836A (en) * | 2021-09-24 | 2021-12-31 | 珠海格力电器股份有限公司 | Temperature and humidity control method and device of frequency converter, frequency converter and air conditioning unit |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20220701 Address after: 411100, 12 Ping'an Road, Yuhu Bay, Yuhu District, Hunan, Xiangtan Applicant after: PING'AN ELECTRIC Co.,Ltd. Address before: No. 181, xihanggang Airport Road, Shuangliu District, Chengdu, Sichuan 610225 Applicant before: HOPE SENLAN SCIENCE & TECHNOLOGY Corp.,Ltd. |