CN2387661Y - A. C. speed variable electric machine - Google Patents
A. C. speed variable electric machine Download PDFInfo
- Publication number
- CN2387661Y CN2387661Y CN99244042U CN99244042U CN2387661Y CN 2387661 Y CN2387661 Y CN 2387661Y CN 99244042 U CN99244042 U CN 99244042U CN 99244042 U CN99244042 U CN 99244042U CN 2387661 Y CN2387661 Y CN 2387661Y
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- CN
- China
- Prior art keywords
- motor
- speed
- double
- fed
- adjusting device
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- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to an AC variable speed motor, which belongs to the structural design field of the variable speed motor. The variable speed motor is composed of an asynchronous motor of a winding cage rotor, a water resistance and a cascade/double-fed adjusting device, wherein, a high-voltage winding leading-out terminal of a stator of a winding cage asynchronous motor is connected with a high-voltage power supply. A low-voltage winding leading out terminal of the stator is connected with the water resistance and the input terminal of the cascade/double-fed adjusting device. The output terminal of the cascade/double-fed adjusting device is connected with a low-voltage power supply. The utility model has the advantages of high reliability, high efficiency and low investment.
Description
The utility model belongs to buncher structural design field.
Ac adjustable speed motor drives blower fan, water pump is regulated flow-rate ratio and regulated flow saving 20%～30% electric energy with flapper valve.
Ac adjustable speed motor and speed regulating method are more, but can highly reliable, can imitate, low investment three is unified in also not having of speed regulating method.As frequency control, efficient but investment is high: tandem control, efficient, investment is low but poor reliability; The fluid coupling speed governing is invested lowly, but efficient is low; Especially the speed adjusting technique highly reliable, efficient, low investment of the high-tension motor of this scope of 300～3000KW is very great, very difficult problem.
The purpose of this utility model is, for overcoming the weak point of prior art, design a kind of novel ac adjustable speed motor, by passing through tandem, doubly-fed adjustable speed method around the cage asynchronous machine, adopt water resistance as startup, have characteristics highly reliable, efficient, low investment.
The utility model proposes a kind of ac adjustable speed motor, it is characterized in that, constitute by cage rotor asynchronous motor, water resistance, tandem/double-fed adjusting device; Wherein, said cage asynchronous machine stator high pressure winding is drawn the termination high voltage source, and stator low pressure winding is drawn the said water resistance of termination and tandem/dual-feedback speed-adjusting device input, said string accent/double-fed device output termination low-tension supply.
The utlity model has following characteristics:
High reliability:
(1) owing to do not have slip ring and carbon brush, just than the phase-wound rotor asynchronous machine with slip ring and carbon brush of common tandem, doubly-fed adjustable speed use, its reliability has had raising in itself, has reached the squirrel cage induction motor level for this around the cage asynchronous machine in employing.
(2) adopt water resistance to start speed governing
Water resistance uses as starter, and detent torque is big, and starting current is little, in tandem, when dual-feedback speed-adjusting device breaks down, also can be used for electric machine speed regulation, there is not the problem of burning the contact when switching as metallic resistance in water resistance, and can level and smooth reliably continuous speed adjustment.
Efficiently:
The utility model is based on the adjusting slip power, carries out the principle of electric machine speed regulation.Slip power returns electrical network by cascade unit, reaches the purpose of efficient speed governing, is the chopped mode cascade unit owing to what adopt, so more common cascade unit has improved power factor, reduced the pollution of harmonic wave to electrical network.At the motor of larger capacity, slip power is by double-fed device control slip power flow direction, when slip power when motor flows to electrical network, motor is being lower than with the speed governing of leg speed scope; When slip power motor when electrical network flows to motor is being higher than with the speed governing of leg speed scope.Because tandem and doubly-fed adjustable speed slip power obtain reclaiming and utilize, so that governing system reaches is efficient.When tandem and double-fed device break down, switch to the water resistance speed governing operation, slip power consumption does not at this moment utilize on water resistance.But the whole governing system at the blower fan load of the pumps compares not governing system, still can save 20% above electric energy.
Low investment:
(1) speed regulating device capacity: compare with RHVC, the converter plant capacity should be greater than capacity motor.The cascade speed regulator capacity is equivalent to slip power, and speed adjustable range is more little, and installed capacity is more little.As adopt the double-fed adjusting device because of can be according to being speed governing in the upper and lower scope of benchmark, so reduce half again than cascade speed regulator capacity at identical speed adjustable range with leg speed.
(2) big above of motor of speed regulating device electric pressure: 300KW is high pressure 6KV or 10KV.Therefore RHVC will stand high pressure 6KV or 10KV, and string transfers the double-fed device little because of capacity, even the 3000KW motor also can adopt less than 1KV voltage.
(3) speed regulating device main circuit: even same installed capacity, converter plant is than tandem price height.
(4) motor price: what the utility model adopted is the cage asynchronous electric, expensive 1.5 times than squirrel cage induction motor of its costs.
High-tension motor drags the blower fan load of the pumps and carries out speed governing operation, and adopting the utility model formula investing is frequency control
The expense of can recouping the investment about 1 year.
In sum, the utlity model has high reliability, efficient, low investment, detent torque is big, starting current is little.Control section adopts total control, and complete protection and demonstration and the rotating speed that does not have a tachometer show it is the another characteristics that the utility model device has.
Fig. 1 is a structural representation of the present utility model.
The embodiment of a kind of ac adjustable speed motor of the present utility model in conjunction with the accompanying drawings, is described in detail as follows:
As shown in Figure 1, present embodiment is made of cage rotor asynchronous motor, water resistance, tandem/double-fed adjusting device.Wherein, cage asynchronous machine (YLRT type) stator high pressure winding exit A, B, C connect 6KV or 10KV power supply, stator low pressure winding water receiving resistance and cascade speed regulator input, behind the electric motor starting, drop into cascade speed regulator (plain edition TJC type, copped wave string transfer HC type all can) or drop into the double-fed adjusting device.After speed regulating device drop into, the excision water resistance, motor is in the speed governing operation state, and slip power returns 380 volts of power supplys of low pressure by the serial regulator device output, when tandem or double-fed adjusting device break down, automatically switches to water resistance, can proceed speed governing operation.When the motor long period operates in rated power, rated speed, can be with the short circuit of motor low pressure exit, motor operates in not speed governing state.
Claims (1)
1, a kind of ac adjustable speed motor is characterized in that, is made of cage rotor asynchronous motor, water resistance, tandem/double-fed adjusting device; Wherein, said cage asynchronous machine stator high pressure winding is drawn the termination high voltage source, and stator low pressure winding is drawn the said water resistance of termination and tandem/dual-feedback speed-adjusting device input, said string accent/double-fed device output termination low-tension supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99244042U CN2387661Y (en) | 1999-09-03 | 1999-09-03 | A. C. speed variable electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99244042U CN2387661Y (en) | 1999-09-03 | 1999-09-03 | A. C. speed variable electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2387661Y true CN2387661Y (en) | 2000-07-12 |
Family
ID=34030220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99244042U Expired - Fee Related CN2387661Y (en) | 1999-09-03 | 1999-09-03 | A. C. speed variable electric machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2387661Y (en) |
-
1999
- 1999-09-03 CN CN99244042U patent/CN2387661Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: JINAN LUMENG POWER TECHNOLOGY DEVELOPMENT CO., LT Free format text: FORMER OWNER: ZHOU MINGBAO Effective date: 20031024 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20031024 Address after: 250101 room 1016, Qilu Software Park building, Ji'nan hi tech Zone, Shandong Patentee after: Jinan Lumeng Power Science and Technology Development Co. Ltd. Address before: 100084, Haidian District Tsinghua Yuan, Beijing, No. 1001, Tsinghua University Patentee before: Zhou Mingbao |
|
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Jinan Lumeng Power Science and Technology Development Co. Ltd. Document name: Notification to Pay the Fees |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20000712 |