SG174638A1 - Test platform for electric motors - Google Patents
Test platform for electric motors Download PDFInfo
- Publication number
- SG174638A1 SG174638A1 SG2010016889A SG2010016889A SG174638A1 SG 174638 A1 SG174638 A1 SG 174638A1 SG 2010016889 A SG2010016889 A SG 2010016889A SG 2010016889 A SG2010016889 A SG 2010016889A SG 174638 A1 SG174638 A1 SG 174638A1
- Authority
- SG
- Singapore
- Prior art keywords
- electric motor
- alternator
- motor
- mains
- electric
- Prior art date
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000005611 electricity Effects 0.000 abstract description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000819 phase cycle Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
Test Platform for Electric MotorsAbstractThis invention provides an energy efficient way to test large sizeelectric motor by using a small amount of electricity. This eliminatesthe need to connect large size electric motors directly to the Mains,which can be complicated and expensive. This invention uses thelarge electric motor to generate electricity by driving an alternator andfeed the electricity back into the electric motor to drive the alternatoragain. Energy losses are topped-up using a motor-generator to keepthe process going.With this process in place the electric motor can be operated thesame as it would have been connected to the Mains. A wide range oftests can be performed on the electric motor and will have minimumimpact to the Mains.One of the important values that can be verified in this setup is theefficiency of the electric motor.Fig 1.
Description
Test Platform for Electric Motors
This invention is to allow for the efficiency of large size electric motor to be determined using an energy efficient method such that only a small amount of electricity is used.
This eliminates the need to use dyno tester, which uses a lot of energy.
In the testing of electric motors, it is typical to connect the electric motor to a dyno tester. The dyno tester is driven by the electric motor to its operating perimeters and the data for the electric motor is collected. It is often a problem when the electric motor is of a big power rating because it is very complicated and expensive to connect large electric motor to the Mains. The Mains regulators do not like this especially when it is used for testing purposes due to the risk of tripping and disturbance to the Mains.
The use of dyno tester also means that the electricity used is dissipated and not used to do useful work, i.e. wasted. This is a very big waste of energy.
Therefore to test large electric motor using dyno tester is expensive and not environmentally friendly.
Fig. 1 is a block diagram showing the various mechanical and electrical components of the embodiment of this invention.
One object of the present invention is to provide an economical electric motor tester.
Another object is the provision of such a tester which allows for reactive power supply to the electric motor. Industry requirement is usually between 0.8 to 1.0 pf (power factor), but other values may be required depending on requirement.
Another object is the provision of such an electric motor tester which can perform over speed test of 20%.
Another object is the provision of such an electric motor tester which can perform over load test of 20% to 50%.
Another object is the provision of such an electric motor tester which can perform testing in 50Hz (1500rpm) or 60Hz (1800rpm).
Another object is the provision of such an electric motor tester which can perform testing in 3 phase or 1 phase.
These and other objects will become apparent to those skilled in the art in light of the following drawings and accompanying figures.
Referring to Fig. 1 which illustrates a preferred embodiment of the invention, an electric motor test fixture is represented at 10.
The electronic analysis and control equipment 30 and motor generator 20 are used to operate the fixture.
The electric motor test fixture 10 include an electric motor rigidly mounted undergoing test 60, an alternator 40 supported by low friction bearings. The alternator 40 is connected to the torque transducer 50 by a rigid coupling. The electric motor under test 60 is connected to the torque transducer 50 by a flexible coupling.
The low friction bearings are used to support / suspend the alternator 40.
A worm gear wheel is mounted to the body of the alternator 40.
A worm gear mounted on a shaft and driven by an electric motor 41, matches with the worm gear wheel to turn the alternator 40 body.
The electric motor 41 is to be able to rotate in both directions.
A motor generator 20 is electrically connected as part of the system to operate the electric motor test fixture 10. The motor generator consist of an electric motor 100 connected to an alternator 90 by a flexible coupling. A rotation speed sensor 260 is used to provide feedback to the Variable Speed Drive 110 to keep the speed at the preset level.
The electronic analysis and control equipment 30 is located remote from the test fixture 10 and motor generator 20. It is connected thereto by means of cables 200, 210, 220, 240, 270 and 280. Cable 300 supplies power to operate the electronic analysis and control equipment. Cable 250 is used to control the electric motor 100 on motor generator 20. Cable 230 is used to connect the electric motor under test with the alternator 40. Cable 210 is used to control the motorized switch 70 and provide signals to the Synchronising Circuit 170. Cable 220 controls the rotation of the alternator body. Cable 200 controls the excitation of the alternator 40. Cable 280 provides measurement signals to the Digital Display 290.
The electronic analysis and control equipment 30 consists of variable
DC power supply 140, swivel motor control 180, motorized switch control, synchronization circuit 170, torque controller 190, and all related meters 120, 130 and 290.
In operation, the motor generator 20 is started by a push button on the Variable Speed Drive 110 interface panel. The speed of the electric motor 100 is allowed to stablise at the preset value, either 1500rpm or 1800rpm. The rotation speed sensor 260 will provide feedback to the Variable Speed Drive 110 to ensure the rotation speed is kept constant at the preset level.
The electric motor under test 60 is started by a push button on the
Variable Speed Drive 80 interface panel.
The required voltage for the electric motor under test 60 is set at the
Automatic Voltage Regulator (AVR) on the motor generator alternator 90. The required voltage is also set at the alternator 40 by adjusting the excitation using the variable DC power supply 140 and observing
DC Voltage and Ampere meters 120 & 130.
The phase sequence of the alternator 40 and electric motor under test 60 is checked to ensure that they are the same.
When the synchronization circuit 170 is activated, the synchronizing point is brought to the 12 o'clock position by controlling the speed of the electric motor under test 60.
When the synchronization position is reached, the synchronization circuit 170 will provide a signal to close the motorized switch 70. The indication lamp 150 will provide indication of the switch status. The alternator 40 and electric motor 60 is now connected and operating at no load or very low load.
Rotating the alternator 40 body and adjusting the variable DC power supply 140 allows control of the amount of load (KVA and KW) and power factor (pf) on the electric motor under test 60.
The parameters of KVA, KW, pf, Voltage, Current, and Frequency can be read off from the Digital Display 290. The operating torque value can be read off from the Torque Controller 240.
With the alternator 40 and electric motor under test 60 mechanically and electrically connected in this way. The electric motor 60 can be tested at any load from No Load to Full Load and at any Power Factor from 0 to 1.0 lagging or leading.
To electrically disconnect the alternator 40 and electric motor under test 60 the loading to the electric motor under test 60 is to be reduced to the lowest possible level and then activating the push button 160 to open the motorized switch 70. The switch status can be observed by the indication lamps 150.
While the form of apparatus herein described constitutes a preferred embodiment of this invention, it is to be understood that the invention is not limited to this precise form of apparatus and that changes may be made therein without departing from the scope of the invention, which is defined in the appended claims.
Claims (4)
1. An apparatus for the testing of electric motors, the mechanical layout of the test apparatus. The layout chosen in this invention is the preferred layout, it is to be understood that the invention is not limited to this precise form of layout. Layouts that effectives the same transfer of energies are a preferred embodiment of this invention.
2. Method and procedure of electrically connecting / disconnecting the electric motor 60 and alternator 40.
3. Method and procedure of controlling the loading of the electric motor 60 is the preferred layout, it is to be understood that the invention is not limited to this precise form of layout. Layouts that effectives the same action of rotating the alternator 40 body are a preferred embodiment of this invention.
4. Method and procedure of measuring the component elements that makes up the efficiency of the electric motor 60 and deriving at the efficiency of the electric motor 60.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SG2010016889A SG174638A1 (en) | 2010-03-10 | 2010-03-10 | Test platform for electric motors |
| PCT/SG2010/000399 WO2011112148A1 (en) | 2010-03-10 | 2010-10-19 | Test platform for electric motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SG2010016889A SG174638A1 (en) | 2010-03-10 | 2010-03-10 | Test platform for electric motors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SG174638A1 true SG174638A1 (en) | 2011-10-28 |
Family
ID=44563733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SG2010016889A SG174638A1 (en) | 2010-03-10 | 2010-03-10 | Test platform for electric motors |
Country Status (2)
| Country | Link |
|---|---|
| SG (1) | SG174638A1 (en) |
| WO (1) | WO2011112148A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472390B (en) * | 2013-08-22 | 2016-12-28 | 郑州宇通客车股份有限公司 | Electromechanical testing motor is to dragging platform and hybrid power system thereof |
| CN103995206A (en) * | 2014-05-30 | 2014-08-20 | 江苏三恒科技股份有限公司 | Frequency converter testing device |
| WO2017105165A1 (en) * | 2015-12-14 | 2017-06-22 | Diaz Quintanar José Antonio | Test bench for dc motors |
| CN106291180B (en) * | 2016-08-01 | 2018-11-30 | 广东优科检测技术服务有限公司 | High pressure tests isolating device automatically |
| CN110133499A (en) * | 2019-04-30 | 2019-08-16 | 固安华电天仁控制设备有限公司 | A kind of method that wind power pitch motor is tested automatically |
| CN113447812B (en) * | 2020-03-25 | 2024-03-26 | 宁波强生电机有限公司 | DC motor testing device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3898875A (en) * | 1973-10-09 | 1975-08-12 | Whirlpool Co | Method and apparatus for testing electric motors |
| US4335619A (en) * | 1980-03-05 | 1982-06-22 | Westinghouse Electric Corp. | Motor load test apparatus |
| FR2497270A1 (en) * | 1980-12-30 | 1982-07-02 | Ams Sa | METHOD AND DEVICE FOR ENERGY RECOVERY, IN ELECTRICAL FORM, FOR MOTOR TEST BENCH |
-
2010
- 2010-03-10 SG SG2010016889A patent/SG174638A1/en unknown
- 2010-10-19 WO PCT/SG2010/000399 patent/WO2011112148A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011112148A1 (en) | 2011-09-15 |
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