Types of Tests on DC Machine
Various kinds of tests are carried out on a DC machine where each of the types of tests is used for evaluation of a specific characteristic of the DC machine. These include:
- Open Circuit Test: This test is used for the analysis of the magnetic behavior of the DC machine. Here it includes the test of the machine at its rated speed, without any load at all and measuring the armature current at different field currents.
- Short Circuit Test: Conducting this test leads to getting the short circuit characteristic curve of the machine. Its working principle relies on internally short circuiting the armature terminals and the machine runs at a very low speed.
- Load Test: This test gives an idea about mode of operation of the DC machine as well as its voltage regulation. It consists of running the electric motor to its full capacity and measuring the total power used and generated.
Testing of DC Machine
The direct current (DC) machines have been from the beginning of electrical engineering studies, since the end of the 19th century. They are used in many different industries such as manufacturing and transportation, and they are still applicable even though the current age is digital. The quality performances and dependability of these machines are the most important factors during their whole lifespan. This is why they are subject to extensive testing.
Testing is a tool that helps us to determine the functions of the machine, show if there are any mistakes, and correct them if needed. It also serves to define the instrument, which is an important criterion of its energy conservation and cost-effectiveness. Here we will consider the DC machine’s test type, procedure, and value.
Table of Content
- Definition of Testing
- Types
- Open Circuit Test
- Short Circuit Test
- Load Test
- Determination of Efficiency
- Applications