Armature rotor test is a necessary test before the DC brush motor factory, what are the armature rotor test items? The following is a brief introduction to you. DC brush motor armature rotor structure is shown below, mainly by the armature winding, commutator, brush device, fan, armature core, shaft and other components. According to the structure of the armature rotor, it can be seen that the armature rotor test items of DC brushed motor are: Bar to bar resistance, Diagonal resistance, welding resistance, Insulation resistance, AC Hi-pot、Surge, and so on.
1, DC brush motor armature rotor test items - bar to bar resistance: adjacent (or not adjacent) to the two pieces of commutator between the coil DC resistance.
Bar to bar resistance generally refers to the resistance between the commutator blades of a motor.
The measurement of the resistance between blades of DC brush motor is an effective means to detect the resistance balance of stator coil. This data is specified in the preventive test procedure of electric power equipment.
2, DC brush motor armature rotor test items - Diagonal resistance: the DC resistance value of the coil of the two commutator pieces across 180 degrees.
3, DC brush motor armature rotor test items - welding resistance: commutator and winding resistance between the welding point.
Welding resistance test is mainly to detect whether the armature rotor has false weld, missing weld, leakage weld and so on. Because the welding resistance value itself is small, and the difference between the resistance value data of the virtual welding point is not big, so the general single table can not accurately and comprehensively screen the overall armature virtual welding point, so that the armature rotor unqualified products into the market.
4, DC brush motor armature rotor test items - insulation resistance: conventional insulation between the shaft and the windings to test to see if it meets the safety specifications for the use of armature rotor.
It should be noted that the insulation resistance will be affected by temperature and air humidity changes, in different environments in the individual test data is not accurate.
5, DC brush motor armature rotor test project - AC hi-pot: test AC hi-pot is the main purpose of the armature rotor shaft iron, shaft line, iron wire insulation performance of over-voltage performance testing.
Detects that short-circuiting, breakdown, etc., occurs when an AC voltage is applied for a certain period of time.
6, DC brush motor armature rotor test items - surge: surge refers to the withstand voltage between the two conductors of the adjacent winding.
It usually refers to the insulation level of the windings of generators and motors, and is mostly used in laboratories and in factory testing of motors. The surge test requires high voltage to be applied to the windings, and by comparing the waveforms of the attenuated voltages at various levels, it analyses whether there is any surge short-circuit, detects whether the insulation between the iron cores is qualified or not, and whether there is any breakage of the contact between the copper wires.
AIP for DC brush motor armature rotor test items research and development armature rotor test system, by the constant current power supply, voltage detection circuit and control circuit, the output current can be adjusted, the current is stable, the resistance value is directly displayed, the data is directly readable, to improve the test speed. It can effectively test the armature rotor test items with one key, and improve the efficiency of motor factory test. At the same time, it can solve the hidden danger of unqualified armature rotor factory caused by the above-mentioned false welding difficult to detect and temperature difference, and improve the qualified rate of motor factory.
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