CN101216534A - Electric motor dynamic load control device - Google Patents
Electric motor dynamic load control device Download PDFInfo
- Publication number
- CN101216534A CN101216534A CNA2007100512226A CN200710051222A CN101216534A CN 101216534 A CN101216534 A CN 101216534A CN A2007100512226 A CNA2007100512226 A CN A2007100512226A CN 200710051222 A CN200710051222 A CN 200710051222A CN 101216534 A CN101216534 A CN 101216534A
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- Prior art keywords
- motor
- direct current
- control device
- power supply
- dynamic load
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Abstract
The invention relates to a dynamic load control device of motor, which belongs to the field of electric drive control technology, in particular to a dynamic operation test control device of motor. The invention solves the problems of prior control device, such as large impulse current to a power grid, high energy consumption in test and inconvenient adjustment of load power. The technique scheme of the invention is that the invention includes a DC speed regulating device and a frequency-variable feedback power supply, and the DC speed regulating device provides a working power supply for the frequency-variable feedback power supply. Compared with prior art, the invention has the advantages of (1) optimized control system and control process; (2) stable start of equipment to prevent overlarge impulse current to the power grid in the start process of the equipment; (3) significant energy saving effect; and (4) improved field working environment.
Description
Technical field
The invention belongs to Electrified Transmission control technology field, relate to a kind of dynamic operation experimental control device of motor specifically.
Background technology
At present, the load equipment that domestic motor manufacturing plant adopts when the motor dynamic operation is tested generally is mechanical type load or magnetic-type load, adopting this load control mode is to give the power supply of test motor with industrial electrical network, or the process frequency-converting control device drags load equipment by the test motor again and moves to the power supply of test motor.This control mode has several weak points:
When 1, adopting industrial electrical network directly to power, fix, can not carry out motor and when frequency change, move performance test because of the frequency of industrial electrical network.
2, for the high capacity motor test, need very powerful load equipment, energy consumption height in the test.
3, at the trial, be not easy to the size of regulating load power.
Summary of the invention
The objective of the invention is at above-mentioned deficiency, and a kind ofly starting steadily of providing, reduce to power network current impact, the static unsteady flow control power supply of energy efficient, as the control power supply in the electric motor dynamic load test opertaing device.
Technical scheme of the present invention is: the present invention includes direct current speeder and variable frequency feedback power supply, provide working power by direct current speeder for the variable frequency feedback power supply.
The digital large power dc motor speed regulating device that said direct current speeder is made up of direct current motor control device and direct current motor excitation unit in the technical solution of the present invention.
Said variable frequency feedback power supply is made of direct current motor, synchronous generator, asynchronous motor and synchronous motor in the technical solution of the present invention, the variable frequency feedback power supply is that a direct current motor drags synchronous generator, synchronous generator is output as asynchronous motor working power is provided, this asynchronous motor is accompanied examination motor is coaxial connects with one, accompany the examination motor to drag synchronous motor, this synchronous motor drags another direct current motor, constitutes closed driving-chain.
Said direct current motor control device is connected with the armature of direct current motor in the technical solution of the present invention, and the direct current motor excitation controlling device connects the field coil of direct current motor, synchronous generator, asynchronous motor and synchronous motor respectively.
The armature of said two direct current motors is connected in parallel in the technical solution of the present invention.
The present invention has obtained following effect owing to adopt static unsteady flow control power supply:
1, control system and control procedure have been optimized;
2, device start is steady, reduced equipment in start-up course to the electrical network electric current that causes excessive shock;
3, energy-saving effect is obvious;
4, improved the work on the spot environment.
Description of drawings
Fig. 1 is an electrical schematic diagram of the present invention.
Embodiment
As shown in Figure 1, Direct Current Governor System adopts digital large power dc motor speed regulating device, by direct current motor control device KG-1 and KG-2, and DC excitation control device KG-3 forms, the power supply of direct current motor KG-1 and KG-2 is by 50HZ, 6 kilovolts electrical network provides, DC excitation control device KG-3 is by 50HZ, 380 volts of electrical networks provide, digital large power dc motor speed regulating device is a prior art, the direct current speeder that direct current motor control device KG-1 and KG-2 and direct current motor excitation controlling device KG-3 form provides working power for the variable frequency feedback power supply, and the variable frequency feedback power supply is direct current motor ZD
1Drag synchronous generator TF running, the electric energy of synchronous generator TF output is tested asynchronous motor YD
1Provide working power, tested asynchronous motor YD
1With one accompany examination motor YD
2Examination motor YD is accompanied in coaxial connection
2Drag a synchronous motor TD running, synchronous motor TD drags direct current motor ZD
2Running, direct current motor ZD
1With ZD
2Armature be connected in parallel, constitute the driving-chain of a closure, the exciting current of regulating synchronous motor TD can reach the size of control test load; Direct current motor control device KG-1 and KG-2 and direct current motor ZD
1And ZD
2Armature connect, by direct current motor excitation controlling device KG-3 respectively with direct current motor ZD
1And ZD
2, synchronous generator TF, asynchronous motor YD
1And YD
2, and the field coil of synchronous motor TD connect, for it provides exciting current.Principle of work is: by control direct current motor control device KG-1, or direct current motor control device KG-2 puts into operation, is direct current motor ZD
1With ZD
2Armature working power is provided, regulate two direct current motor ZD
1, ZD
2The size of exciting current, make direct current motor ZD
1Constitute the power supply unit with synchronous generator TF, be operated in generating state, be tested asynchronous motor YD
1Voltage, frequency adjustable and stable experiment power supply are provided; And direct current motor ZD
2Be operated in motoring condition with synchronous motor TD and accompany examination motor YD
2Form energy feedback unit, as tested asynchronous motor YD
1Load, with tested asynchronous motor YD
1The test energy by accompanying examination motor YD
2Feed back to the direct current source, constitute the NE BY ENERGY TRANSFER chain of a closure, to realize the effect of saves energy; By excitation system control to the operation motor, reach frequency stabilization, stable, the stable service requirement of load of voltage, realize asynchronous motor YD
1Carry out load, temperature rise test.
Claims (5)
1. an electric motor dynamic load control device is characterized in that control device comprises direct current speeder and variable frequency feedback power supply, provides working power by direct current speeder for the variable frequency feedback power supply.
2. electric motor dynamic load control device according to claim 1, it is characterized in that said direct current speeder is by direct current motor control device KG-1 and KG-2, and the digital large power dc motor speed regulating device of direct current motor excitation controlling device KG-3 composition.
3. electric motor dynamic load control device according to claim 1 is characterized in that said variable frequency feedback power supply is by direct current motor ZD
1And ZD
2, synchronous generator TF, asynchronous motor YD
1And YD
2, synchronous motor TD constitutes, the variable frequency feedback power supply is direct current motor ZD
1Drag synchronous generator TF, synchronous generator TF is output as asynchronous motor YD
1Provide working power, asynchronous motor YD
1With one accompany examination motor YD
2Examination motor YD is accompanied in coaxial connection
2Drag synchronous motor TD, synchronous motor TD drags direct current motor ZD
2, constitute closed driving-chain
4. according to claim 1,2 or 3 described electric motor dynamic load control devices, it is characterized in that said direct current motor control device KG-1 and KG-2 and direct current motor ZD
1And ZD
2Armature connect, direct current motor excitation controlling device KG-3 meets direct current motor ZD respectively
1And ZD
2, synchronous generator TF, asynchronous motor YD
1And YD
2, synchronous motor TD field coil.
5. according to claim 1 or 3 described electric motor dynamic load control devices, it is characterized in that said direct current drive ZD
1And ZD
2Armature is connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100512226A CN101216534A (en) | 2007-01-06 | 2007-01-06 | Electric motor dynamic load control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100512226A CN101216534A (en) | 2007-01-06 | 2007-01-06 | Electric motor dynamic load control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101216534A true CN101216534A (en) | 2008-07-09 |
Family
ID=39623012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100512226A Pending CN101216534A (en) | 2007-01-06 | 2007-01-06 | Electric motor dynamic load control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101216534A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213746A (en) * | 2010-04-02 | 2011-10-12 | 英泰集团有限公司 | Frequency-conversion speed-regulation type energy-saving power feedback test system |
| CN102508162A (en) * | 2011-11-21 | 2012-06-20 | 新疆金风科技股份有限公司 | Low-voltage ride through detection system and method of wind generating set |
| CN113093007A (en) * | 2021-04-29 | 2021-07-09 | 哈动国家水力发电设备工程技术研究中心有限公司 | Subsynchronous load test method for electric working condition of variable-speed motor |
-
2007
- 2007-01-06 CN CNA2007100512226A patent/CN101216534A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213746A (en) * | 2010-04-02 | 2011-10-12 | 英泰集团有限公司 | Frequency-conversion speed-regulation type energy-saving power feedback test system |
| CN102508162A (en) * | 2011-11-21 | 2012-06-20 | 新疆金风科技股份有限公司 | Low-voltage ride through detection system and method of wind generating set |
| CN113093007A (en) * | 2021-04-29 | 2021-07-09 | 哈动国家水力发电设备工程技术研究中心有限公司 | Subsynchronous load test method for electric working condition of variable-speed motor |
| CN113093007B (en) * | 2021-04-29 | 2023-02-07 | 哈动国家水力发电设备工程技术研究中心有限公司 | Subsynchronous load test method for electric working condition of variable-speed motor |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080709 |