What are the testing methods of DC motor?
The main tests used for DC machines are: Open circuit test. Short circuit test. Load test.
How do you test the performance of a DC motor?
Important Tests of DC Machines
- Efficiency By Direct Loading.
- Brake test.
- Using calibrated generator.
- Swinburne’s Method ( Indirect Method )
- Regenerative or Hopkinson’s-Test ( Regenerative Method )
- Retardation or Running down Test.
Why Hopkinson test is called heat run test?
Hence, the power drawn from the external supply is therefore used to overcome the internal losses of the motor-generator set. Hopkinson’s test is also called regenerative test or back to back test or heat run test.
What is Swinburne test?
The Swinburne test is an indirect method for determining the efficiency of DC motors. It works by finding the no-load losses experimentally and then estimating additional losses from the rated motor data. From this information, the efficiency can be determined at any applied load.
What is dc machine testing?
Testing of machines is used for finding Losses, Temperature rise and Efficiency. The efficiency of a d.c. machine depends on its losses. When losses are decrease, The efficiency is increase and it is vice-versa.
What is Hopkins test in DC machine?
Definition: A full load test which is used to test the efficiency of a DC machine is known as Hopkinson’s test. An alternate name of this test is back to back, heat run, and regenerative test. This test uses two machines which are connected electrically and mechanically with each other.
What is Hopkins test?
The Hopkins-Cole reaction, also known as the glyoxylic acid reaction, is a chemical test used for detecting the presence of tryptophan in proteins. A protein solution is mixed with Hopkins Cole reagent, which consists of glyoxylic acid.
Which test on dc machine is called as regenerative test?
Explanation: Hopkinson’s test is a regenerative test, because the power drawn from the mains is only that needed to supply losses.
How do you test a 3 phase DC motor?
Using a multimeter, check the continuity of motor winding from phase to phase ( U to V, V to W , W to U ). Each phase to phase must have a continuity if winding is OK. If any particular phase fails the continuity test, your motor is probably burnt.
How to test a DC shunt motor?
BRAKE TEST ON DC SHUNT MOTOR • Another method of testing the d.c. motor is brake test method. This is a direct method of testing the motor. • In this method, the motor is put on the direct load by means of a belt and pulley arrangement. Brake adjusting the tension of belt, the load is adjusted to give the various values of currents.
Where can I find a free power point presentation for motor?
MOTOR OPERATION , CONSTRUCTION , CIRCUIT – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com – id: 803ec6-Y2U0Z Toggle navigation Help Preferences Sign up Log in Advanced DC MOTOR – PowerPoint PPT Presentation Actions
How to test a motor?
This is a direct method of testing the motor. • In this method, the motor is put on the direct load by means of a belt and pulley arrangement. Brake adjusting the tension of belt, the load is adjusted to give the various values of currents. The load is finally adjusted to get full load current.
What are the applications of DC motors?
APPLICATIONS OF DC MOTORS MOTORS.. APPLICATIONS… D.C. SHUNT MOTOR LATHES , FANS, PUMPS DISC AND BAND SAW DRIVE REQUIRING MODERATE TORQUES. D.C. SERIES MOTOR ELECTRIC TRACTION, HIGH SPEED TOOLS D.C. COMPOUND MOTOR ROLLING MILLS AND OTHER LOADS REQUIRING LARGE MOMENTARY TORQUES.