A D.C. motor maintenance program is a preventative and corrective maintenance schedule that covers inspections, cleaning, testing, replacement and lubrication tasks that are necessary to ensure the proper operation of D.C. motors and associated equipment. You will also want to remove all electrical terminations from the power source that feeds the motor.
By following a basic set-up you can test a DC motor using this high voltage testing device.
This technique along with Since multiple coils and windings are tested, the procedures for doing the tests are different. You should expose the bare wire leads that conduct the electrical power into the motor. Remove the wire connections leading from the motor to the DC battery. Motor testing equipment Newer more contemporary instruments make testing even easier. Visual inspec- tion and electrical testing of the armature and fields give the maintenance personnel an under- standing of the condition of the motor. Use of low-resistance ohmmeter?in accordance with procedure for LR ohmmeter?usage. The tests used are also the same. This test can be done in your own workshop using simple hand tools and a specialized electric testing device. DC Motor Armature Testing For a DC Motor Armature, There is a simple method of determining the condition of the Armature. If you have a DC motor that is malfunctioning or drawing and bleeding power through the wires, there are tests that can be done to test the efficacy of the DC motor. Motor Current Monitoring and Analysis (MCSA) is a straight forward tool to diagnosing problems with large inductive motors. Remove all electrical power from the DC motor. By following a basic procedure, you can check a DC motor for shorts. The electrical power for the windings is conducted through carbon brushes.
Implementing a predictive maintenance program takes a … DC Motor Armature Testing For a DC Motor Armature, There is a simple method of determining the condition of the Armature. Some DC motor controllers can either give false readings or become damaged by the reversal of current flow into the control mechanism of the high testing voltage. Brake test is a typical example of direct test. The megger tester uses a high voltage, generally in the 1000 to 10,000 volt range to identify insulation leakage in motor coils and adjacent wiring. Home / Technical Articles / Testing and commissioning procedure for electric motors Scope Of Motor Testing It should be noted that the scope of motor testing depends upon the motor type and size , this being indicated on the inspection forms. This semi-automatic process makes testing multiple coils and DC … Connect Positive end of the DC power supply at one end and the Negative end at the opposite end. In direct method of testing the generator or motor is put on full load and whole of the power developed by it is wasted,. A General Guide to DC Motor Maintenance. DC motor testing is done with the same instrument used for AC motor tests. The most common types rely on the forces produced by magnetic fields.
Drop Test Method: Give a DC Voltage across the commutator Segments for one pole pitch area from a Power supply or Battery. For example, a 90 V dc motor will have smaller conductors and more turns per coil to raise resistance, whereas, a 12 V dc motor will have larger conductors and less turns per coil to lower resistance. This is ideal for verifying optimal function on factory-direct equipment as well as rebuilt or repaired motors. Multi-coil tests are available. Induction Motor Testing and Evaluation Summary As energy costs rise, more emphasis is being placed on determining the health of large inductive motors. For instance, test equipment such as Fluke’s 438-II Power Quality and Motor Analyzer uses algorithms to analyze not only three-phase power quality but also torque, efficiency and speed to determine system performance and detect overloaded conditions, eliminating the need for motor load sensors. Testing of DC Machines (DC Motor and DC Generator) There are several tests that are conducted for testing a dc machine (generator or motor) to judge its performance. Disconnect the power source from the DC motor. MOTOR TESTING METHODS BASED ON IEC 60034-2-1 P LL determined from residual loss (8.2.2.5.1 in Table 2) May 2011 Version 1.1 Document developed as part of the Electric Motor Systems Annex (EMSA) Task C – Testing Centres under the IEA Implementing Agreement for a Co-operating Programme on Efficient Electrical End-Use Equipment (4E) Global Electronic Services electric motor testing procedure includes exhaustive dynamometer testing with a controllable load to test motor function under a wide range of power outputs. A DC motor is any of a class of rotary electrical motors that converts direct current electrical energy into mechanical energy. Nearly all types of DC motors have some internal mechanism, either electromechanical or electronic, to periodically change the direction of current in part of the motor. … Perform dc dielectric withstand voltage tests on machines rated at 2300 volts and greater in?accordance ... Test results of motor starter equipment shall be in accordance with?procedures for testing of motor … DC motor fault zone analysis is a vital part of any DC motor maintenance program.