CN206452179U - A kind of high-voltage frequency converter of mine hoist redundancy stand-by provision - Google Patents
A kind of high-voltage frequency converter of mine hoist redundancy stand-by provision Download PDFInfo
- Publication number
- CN206452179U CN206452179U CN201720027967.8U CN201720027967U CN206452179U CN 206452179 U CN206452179 U CN 206452179U CN 201720027967 U CN201720027967 U CN 201720027967U CN 206452179 U CN206452179 U CN 206452179U
- Authority
- CN
- China
- Prior art keywords
- frequency
- switch
- high pressure
- voltage
- low frequency
- 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.)
- Active
Links
- 238000005065 mining Methods 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Control Of Ac Motors In General (AREA)
Abstract
The utility model is related to mining elevator field; propose a kind of high-voltage frequency converter of mine hoist redundancy stand-by provision; including low frequency frequency converter; low frequency inlet wire knife-like switch, low frequency incoming relay-protection breaker, the first high pressure switching knife-like switch, the second high pressure switching knife-like switch; low-frequency power inlet wire is connected after low frequency inlet wire knife-like switch, low frequency incoming relay-protection breaker with the input of low frequency frequency converter, and the output end of low frequency frequency converter is connected after switching knife-like switch through the second high pressure with the power input of mining elevator motor；The output frequency of low frequency frequency converter meets the rated frequency and rated voltage that f2=U2*f1/U1, f1 and U1 are respectively mining elevator motor, and U2 is the output voltage of low frequency frequency converter；The output end of high voltage converter switches the connection after knife-like switch with mining elevator motor by the first high pressure, and the first high pressure switching knife-like switch and the second high pressure switching knife-like switch pass through the chain connection of the first interlocking gear.The utility model cost is relatively low, can be extensively using mining elevator field.
Description
Technical field
The utility model is related to mining elevator field, and in particular to a kind of inexpensive high-voltage frequency converter of mine hoist
Redundancy stand-by provision.
Background technology
Mine hoist be responsible in the overall process of mining production personnel, mineral, material and equipment up and down and transport
Work, has material impact to production efficiency.Mine hoist, can be because can not repair or more if there is equipment fault in time
Damage part is changed, stopping production accident is caused, its economic loss is huge.It is required to for multiple important components of this mine hoist to be superfluous
Remaining design configurations, to ensure when one or several component malfunctions of elevator, its redundant component can in short-term or it is permanent after
Continuous work.The Electrified Transmission part of mine hoist main composition is frequency converter drive disk assembly, in frequency converter drive disk assembly
For low frequency frequency converter, because its frequency converter price is relatively low, and various brands frequency converter producer stock is more, and mine is either
Plan over-bought same power one is promptly bought or borrowed again when doing redundancy standby host or occurring frequency converter accident, all relatively
Easily solve, the failure stopped for a long time will not be caused to mine, therefore design and configuration can not consider standby redundancy frequency converter.
As shown in figure 1, the transmission control circuit of mine hoisting device is driven for prior art medium-high voltage frequency converter transmission system,
But when the high voltage converter of mine hoist high-voltage drive system breaks down, its simple failure problems can be by using more
Change high voltage converter stand-by unit or high voltage converter trouble unit bypass technology is carried out into short time treatment, and work as high voltage converter
Cell failure more or phase-shifting transformer without purchase high voltage converter stand-by unit or high voltage converter, control
After part etc. is broken down, just can only waiting repair, and high voltage converter is typically all customized production, if standby redundancy can not
Supply, will result in that the mine hoist downtime is long in time, having or even shut down more than ten days, have a strong impact on mine
Production efficiency, and high voltage converter is that a kind of cost is higher, the larger equipment of investment, and the larger equipment of floor space,
Mine is allowed to buy a set of same power high voltage converter obviously unrealistic as standby redundancy.Therefore a kind of inexpensive height is developed
Voltage frequency changer redundancy stand-by provision just seems that lattice are important.
Utility model content
The utility model overcomes the shortcomings of that prior art is present, and technical problem to be solved is：A kind of low cost is provided
High-voltage frequency converter of mine hoist redundancy stand-by provision.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：A kind of mine hoist high voltage variable
Frequency device redundancy stand-by provision, including high voltage converter, high pressure incoming relay-protection breaker, high voltage power supply and the open circuit of high pressure incoming relay-protection
One end connection of device, the other end of high pressure incoming relay-protection breaker is connected with the input of the high voltage converter, high-pressure frequency-conversion
The output end of device is connected with the power input of mining elevator motor, in addition to low frequency frequency converter, low frequency inlet wire knife-like switch, low
Frequency incoming relay-protection breaker, the first high pressure switching knife-like switch, the second high pressure switching knife-like switch, low-frequency power inlet wire is through low frequency inlet wire
It is connected after knife-like switch, low frequency incoming relay-protection breaker with the input of low frequency frequency converter, the output end of low frequency frequency converter is through second
It is connected after high pressure switching knife-like switch with the power input of mining elevator motor；The output frequency of the low frequency frequency converter is met
F2=U2*f1/U1, the f1 are the rated frequency of mining elevator motor, and the U1 is the specified electricity of mining elevator motor
Pressure, the U2 is the output voltage of the low frequency frequency converter；The output end of high voltage converter switches knife-like switch by the first high pressure
The power input with mining elevator motor is connected afterwards, the first high pressure switching knife-like switch and second high pressure switching knife
Switch passes through the chain connection of the first interlocking gear, when first high pressure switching knife-like switch closure, first interlocking gear
The second high pressure switching knife-like switch is disconnected, when first high pressure switching knife-like switch disconnects, first interlocking gear
Make the second high pressure switching knife-like switch closure.
A kind of described high-voltage frequency converter of mine hoist redundancy stand-by provision, in addition to the second interlocking gear, the height
Line protective breaker and the low frequency incoming relay-protection breaker are pressed into by the chain connection of the second interlocking gear, when the height is pressed into
When line protective breaker is closed, second interlocking gear disconnects the low frequency incoming relay-protection breaker, when the height is pressed into
When line protective breaker disconnects, the interlocking gear makes the low frequency incoming relay-protection breaker closing.
The rated voltage of the mining elevator motor is 6KV, and rated frequency is 50Hz, the output of the low frequency frequency converter
Voltage is 660V, and the output frequency of the low frequency frequency converter is 5.5Hz.
The rated voltage of the mining elevator motor be 10KV, rated frequency is 50Hz, the low frequency frequency converter it is defeated
Go out voltage for 660V, the output frequency of the low frequency frequency converter is 3.3Hz.
First interlocking gear and second interlocking gear are mechanical chain mechanism or electrical interlocks mechanism.
The low frequency frequency converter includes brake portion, and the brake portion uses elevator frequency conversion special stainless steel resistance.
A kind of described high-voltage frequency converter of mine hoist redundancy stand-by provision, in addition to high pressure inlet wire disconnection switch,
High-voltage board power inleting terminal is connected with one end of the high pressure inlet wire disconnection switch, the other end of high pressure inlet wire disconnection switch
It is connected with one end of the high pressure incoming relay-protection breaker.
The utility model has the advantages that compared with prior art：The utility model is using a kind of inexpensive, superfluous
Remaining low frequency frequency converter is sent out as the method for the standby transmission of high voltage converter with regard to that can solve mine hoist because of high voltage converter
Raw failure and the problem of stop for a long time, such a method drags performance due to and with good low speed, with regard to that can make mine hoisting
Machine continues to produce, and is that mine reduces the loss that high voltage converter lay-by comes, this low frequency transmission system can not only be high voltage variable
Frequency device carries out redundancy dragging, moreover it is possible to used when being braked as high voltage converter low speed.Low frequency frequency converter is small due to capacity, therefore valency
Lattice are minimum more than 1/5th of the high voltage converter price of its redundancy, and the configuration that ore deposit side can be economic is a set of and is integrated into ore deposit
In well hoister control system, using high-voltage frequency converter of mine hoist redundant low frequency frequency converter, lifting system performance, and can be
Substantial contribution is saved in mine.
Brief description of the drawings
Fig. 1 is the transmission control circuit structural representation of high-voltage frequency converter of mine hoist in the prior art；
Fig. 2 is the transmission control circuit structural representation of high-voltage frequency converter of mine hoist redundant apparatus of the present utility model
Figure.
Embodiment
, below will be to the utility model to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Technical scheme in embodiment is clearly and completely described, it is clear that described embodiment is a part of the present utility model
Embodiment, rather than whole embodiments；Based on the embodiment in the utility model, those of ordinary skill in the art are not making
Go out the every other embodiment obtained under the premise of creative work, belong to the scope of the utility model protection.
As shown in Fig. 2 the standby dress of a kind of high-voltage frequency converter of mine hoist redundancy proposed for the utility model embodiment
Put, including Variable Frequency Drives and low frequency transmission system, wherein, high frequency transmission system includes high pressure inlet wire disconnection switch 1, height
Voltage frequency changer 3, high pressure incoming relay-protection breaker 2, the first high pressure switching knife-like switch 4, high-voltage board power inleting terminal and the high pressure
One end connection of inlet wire disconnection switch 1, the other end of high pressure inlet wire disconnection switch 1 and the high pressure incoming relay-protection breaker
2 one end connection, the other end of high pressure incoming relay-protection breaker 2 is connected with the input of the high voltage converter 3, high-pressure frequency-conversion
The input of device 3 is connected after switching knife-like switch 4 by the first high pressure with the power input of mining elevator motor；Low frequency is driven
System includes low frequency frequency converter 7, and low frequency inlet wire knife-like switch 5, low frequency incoming relay-protection breaker 6, the second high pressure switch knife-like switch 8,
Low-frequency power inlet wire is connected after low frequency inlet wire knife-like switch 5, low frequency incoming relay-protection breaker 6 with the input of low frequency frequency converter 7,
The output end of low frequency frequency converter 7 is connected after switching knife-like switch 8 through the second high pressure with the power input of mining elevator motor；Institute
The output frequency for stating low frequency frequency converter 7 meets f2=U2*f1/U1, and the f1 is the rated frequency of mining elevator motor, described
U1 is the rated voltage of mining elevator motor, and the U2 is the output voltage of the low frequency frequency converter 7；The first high crush-cutting
Tool changing switch 4 and second high pressure switch knife-like switch 8 by the chain connection of the first interlocking gear 9, when the described first high crush-cutting
When tool changing switch 4 is closed, first interlocking gear 9 disconnects the second high pressure switching knife-like switch 8, when first high pressure
When switching the disconnection of knife-like switch 4, first interlocking gear 9 closes the second high pressure switching knife-like switch 8.
The present embodiment switches knife-like switch by the high pressure with mechanical chain mechanism, realizes high voltage converter and low frequency frequency converter
The switchover operation of mode of operation.When high voltage converter works, low frequency frequency converter does not work, when high voltage converter breaks down temporarily
When Shi Wufa is fixed, disconnection switch is switched by high pressure, low pressure frequency device low-tension supply is accessed into, mine hoist just can be real
Existing tick-over.After high voltage converter is fixed, knife-like switch can be switched by high pressure, high voltage converter is accessed into high-tension electricity
Source, mine hoist just can high speed normal work.In addition, feedback signal defencive function, operation can also be set in the device
State-indicating function etc..
The design and modeling of low frequency frequency converter are for low voltage motor, and its voltage exported and frequency are substantially linear
Relation, and high-voltage frequency converter of mine hoist controlled motor voltage is 6KV or 10KV motors, therefore become according to design theory low frequency
Frequency device is can not directly to control 6KV or 10KV high-voltage motor long-term work, by low frequency frequency converter develop it is a set of
Ad hoc sofeware program, can change the linear relationship of low frequency frequency converter output voltage and frequency.Controlled respectively with voltage and frequency come
Reach that low pressure Small-power Inverter long low drags the purpose of high voltage and high power electromotor, it is achieved thereby that low pressure small-power becomes
Frequency device as the electric actuator of high-voltage high-power frequency transformator redundancy purpose.Detailed process is：According to the magnetic flux of motor
The voltage-frequency ratio of the principle that can not be changed and the torque of motor and motor（Voltage U/ frequencies f）Be directly proportional principle, we
Just it can be calculated that when motor rated voltage is 6KV, its frequency f1=50Hz, according to 660V low frequency frequency converters, then root
According to voltage-frequency than U1/f1=U2/f2, its frequency f2=5.5Hz；When motor is 10KV, according to 660V low frequency frequency converters, then root
According to voltage-frequency than U1/f1=U2/f2, its frequency f2=3.3Hz, while the low frequency frequency inverter capacity selected is only high voltage converter capacity
15%, so to ensure that the same torque of low frequency frequency converter drags high-voltage motor, low frequency frequency converter is according to the high pressures of different voltages
Motor is run in 5.5Hz or 3.3Hz low-frequency ranges, here it is low pressure Small-power Inverter is electronic to drag high-power
The principle of machine.
Further, as shown in Fig. 2 a kind of high-voltage frequency converter of mine hoist redundancy of the utility model embodiment is standby
Device, can also include the second interlocking gear 10, the high pressure incoming relay-protection breaker 2 and the low frequency incoming relay-protection breaker
6 pass through the chain connection of the second interlocking gear 10, when the high pressure incoming relay-protection breaker 2 is closed, second interlocking gear
10 disconnect the low frequency incoming relay-protection breaker 6, described when the high pressure incoming relay-protection breaker 2 disconnects, described chain
Mechanism 10 closes the low frequency incoming relay-protection breaker 6.
Further, first interlocking gear 9 and second interlocking gear 10 can be mechanical chain mechanism or electricity
Gas interlocking gear.Those skilled in the art completely can be as needed, selects suitable interlocking gear to realize chain purpose.
The setting of interlocking gear, can prevent high-pressure frequency-conversion from maloperation mode of operation occur with low frequency frequency conversion system.
A kind of operating process of high-voltage frequency converter of mine hoist redundancy stand-by provision of the present utility model is：Work as high voltage variable
When frequency device does not break down, first closed high inlet wire disconnection switch 1 is closed again high pressure lead-in circuit breaker 2, interlocking gear 10 makes
Low frequency incoming relay-protection breaker 6 disconnects, and low frequency frequency converter is stopped, and last closed high switches disconnection switch 4, chain machine
Structure 9 disconnects high pressure switching disconnection switch 8, now, high voltage converter operation drive motor operation；When high voltage converter occurs
When failure needs to start low frequency transmission system, high pressure switching disconnection switch 4 is first disconnected, interlocking gear 9 makes high pressure switching isolation
Knife-like switch 8 is closed, and is closed again low frequency inlet wire knife-like switch 5, finally closes low frequency incoming relay-protection breaker 6, interlocking gear 10 makes height
Pressure lead-in circuit breaker 2 disconnects, and high voltage converter is stopped, and low frequency frequency converter 7 works, and drives mine hoist motor operation.
Further, the low frequency frequency converter 1 includes brake portion, and the brake portion is special not using elevator frequency conversion
Become rusty steel resistance, and the resistance is dynamic braking resistor, coordinates low frequency frequency converter to realize that low frequency transmission system is slowed down or decentralization feedback
Braking.
Wherein, low frequency transmission system is connected to the low frequency transmission system power distribution system of mine low pressure power source special or special configuration
System, low-voltage distribution system can be powered using double-cricuit supply, low equipped with breaker and with defencive functions such as under-voltage, excessively streams
Frequency frequency converter can use digital alternating low frequency frequency converter, realize low frequency stable speed operation, and have and control system PLC communication
Function, good locked rotor characteristic, locked rotor current can arbitrarily be set and actual current value is not over setting value.
Finally it should be noted that：Various embodiments above is only limited to illustrate the technical solution of the utility model, rather than to it
System；Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：It can still modify to the technical scheme described in foregoing embodiments, or to which part or whole
Technical characteristic carries out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly
The scope of each embodiment technical scheme of type.
Claims (7)
1. a kind of high-voltage frequency converter of mine hoist redundancy stand-by provision, including high voltage converter（3）, the open circuit of high pressure incoming relay-protection
Device（2）, high voltage power supply and high pressure incoming relay-protection breaker（2）One end connection, high pressure incoming relay-protection breaker（2）The other end
With the high voltage converter（3）Input connection, high voltage converter（3）Output end and the power supply of mining elevator motor it is defeated
Enter end connection, it is characterised in that also including low frequency frequency converter（7）, low frequency inlet wire knife-like switch（5）, low frequency incoming relay-protection breaker
（6）, the first high pressure switching knife-like switch（4）, the second high pressure switching knife-like switch（8）, low-frequency power inlet wire is through low frequency inlet wire knife-like switch
（5）, low frequency incoming relay-protection breaker（6）Afterwards with low frequency frequency converter（7）Input connection, low frequency frequency converter（7）Output end
Switch knife-like switch through the second high pressure（8）The power input with mining elevator motor is connected afterwards；The low frequency frequency converter（7）'s
Output frequency meets f2=U2*f1/U1, and the f1 is the rated frequency of mining elevator motor, and the U1 is that mine lift is electromechanical
The rated voltage of machine, the U2 is the low frequency frequency converter（7）Output voltage；
High voltage converter（3）Output end pass through the first high pressure switch knife-like switch（4）Power supply afterwards with mining elevator motor is defeated
Enter end connection, first high pressure switches knife-like switch（4）Switch knife-like switch with second high pressure（8）Pass through the first interlocking gear
（9）Chain connection, when first high pressure switches knife-like switch（4）During closure, first interlocking gear（9）Make described second high
Crush-cutting tool changing is switched（8）Disconnect, when first high pressure switches knife-like switch（4）During disconnection, first interlocking gear（9）Make institute
State the second high pressure switching knife-like switch（8）Closure.
2. a kind of high-voltage frequency converter of mine hoist redundancy stand-by provision according to claim 1, it is characterised in that also wrap
Include the second interlocking gear（10）, the high pressure incoming relay-protection breaker（2）With the low frequency incoming relay-protection breaker（6）Pass through
Two interlocking gears（10）Chain connection, when the high pressure incoming relay-protection breaker（2）During closure, second interlocking gear（10）
Make the low frequency incoming relay-protection breaker（6）Disconnect, when the high pressure incoming relay-protection breaker（2）During disconnection, the chain machine
Structure（10）Make the low frequency incoming relay-protection breaker（6）Closure.
3. a kind of high-voltage frequency converter of mine hoist redundancy stand-by provision according to claim 1, it is characterised in that described
The rated voltage of mining elevator motor is 6KV, and rated frequency is 50Hz, the low frequency frequency converter（7）Output voltage be
660V, the low frequency frequency converter（7）Output frequency be 5.5Hz.
4. a kind of high-voltage frequency converter of mine hoist redundancy stand-by provision according to claim 1, it is characterised in that described
The rated voltage of mining elevator motor is 10KV, and rated frequency is 50Hz, the low frequency frequency converter（7）Output voltage be
660V, the low frequency frequency converter（7）Output frequency be 3.3Hz.
5. a kind of high-voltage frequency converter of mine hoist redundancy stand-by provision according to claim 2, it is characterised in that described
First interlocking gear（9）With second interlocking gear（10）For mechanical chain mechanism or electrical interlocks mechanism.
6. a kind of high-voltage frequency converter of mine hoist redundancy stand-by provision according to claim 1, it is characterised in that described
Low frequency frequency converter includes brake portion, and the brake portion uses elevator frequency conversion special stainless steel resistance.
7. a kind of high-voltage frequency converter of mine hoist redundancy stand-by provision according to claim 1, it is characterised in that also wrap
Include high pressure inlet wire disconnection switch（1）, high-voltage board power inleting terminal and the high pressure inlet wire disconnection switch（1）One end connect
Connect, high pressure inlet wire disconnection switch（1）The other end and the high pressure incoming relay-protection breaker（2）One end connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720027967.8U CN206452179U (en) | 2017-01-11 | 2017-01-11 | A kind of high-voltage frequency converter of mine hoist redundancy stand-by provision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720027967.8U CN206452179U (en) | 2017-01-11 | 2017-01-11 | A kind of high-voltage frequency converter of mine hoist redundancy stand-by provision |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206452179U true CN206452179U (en) | 2017-08-29 |
Family
ID=59671248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720027967.8U Active CN206452179U (en) | 2017-01-11 | 2017-01-11 | A kind of high-voltage frequency converter of mine hoist redundancy stand-by provision |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206452179U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633305A (en) * | 2018-12-12 | 2019-04-16 | 盐田国际集装箱码头有限公司 | A kind of frequency converter failure processing method and frequency converter failure processing platform |
| CN112713761A (en) * | 2021-01-05 | 2021-04-27 | 邯郸钢铁集团有限责任公司 | Method and device for rapidly switching power unit of large-scale synchronizer |
-
2017
- 2017-01-11 CN CN201720027967.8U patent/CN206452179U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633305A (en) * | 2018-12-12 | 2019-04-16 | 盐田国际集装箱码头有限公司 | A kind of frequency converter failure processing method and frequency converter failure processing platform |
| CN112713761A (en) * | 2021-01-05 | 2021-04-27 | 邯郸钢铁集团有限责任公司 | Method and device for rapidly switching power unit of large-scale synchronizer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206452179U (en) | A kind of high-voltage frequency converter of mine hoist redundancy stand-by provision | |
| CN103580584A (en) | Redundancy medium voltage alternating current-direct current-alternating current frequency conversion device of duplex winding synchronous motor of mine hoist | |
| CN201374667Y (en) | Multi-motor frequency conversion switching control system | |
| CN103016265B (en) | Alternating current pitch control system using electric network to drive emergency feathering | |
| CN113054885B (en) | Redundant switching system of tower machine converter | |
| CN206313698U (en) | A kind of frequency conversion and power frequency switching circuit air-cooler | |
| CN201928220U (en) | Variable frequency drive device | |
| CN208299708U (en) | Threephase asynchronous machine starting device | |
| CN204633646U (en) | A kind of disintegrating machine threephase asynchronous machine soft starting device | |
| CN101976998A (en) | Variable-frequency driving device and control method thereof | |
| CN105958839A (en) | Switching power supply device and variable propeller system control cabinet | |
| CN202334410U (en) | Frequency conversion control system | |
| CN205986638U (en) | Switching power supply device and change oar system control cabinet | |
| CN206077239U (en) | Elevator exchanges compound high-pressure frequency-conversion control panel | |
| CN204967633U (en) | Oil field beam -pumping unit is with energy -conserving direct current contravariant terminal cabinet | |
| CN211089502U (en) | Motor frequency conversion starting cabinet | |
| CN203950658U (en) | Isolated loaded capacity regulating voltage regulating switch | |
| CN102085986B (en) | Alternating current dual-control and high-voltage matrix frequency-conversion electronic control system of hoisting machine | |
| CN207339712U (en) | Circuit for controlling motor | |
| CN101465525B (en) | High voltage frequency changer isolation trolley type high voltage switch cabinet | |
| CN111030549A (en) | Permanent magnet motor dragging reactive feedback integrated device | |
| CN201975243U (en) | Phase-shifting autotransformer and high-voltage frequency converter capable of starting electric motor in voltage reducing manner | |
| CN203590089U (en) | System for realizing double-channel starting of motor | |
| CN205754107U (en) | A kind of motor dynamics star-delta conversion energy-conserving device | |
| CN201601640U (en) | Star-delta energy-saving control system for mining motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 411, 4th Floor, Building B, High tech International, No. 227 Changzhi Road, Xuefu Industrial Park, Shanxi Transformation and Comprehensive Reform Demonstration Zone, Taiyuan City, Shanxi Province, 030000 Patentee after: Shanxi Keda New Energy Technology Co.,Ltd. Address before: No. 27 Xinkai South Lane, Xiaodongmen Street, Taiyuan City, Shanxi Province, 030013 Patentee before: SHANXI KEDA FUSHENG INTELLIGENT CONTROL TECHNOLOGY Co.,Ltd. |
|
| CP03 | Change of name, title or address |