The armature rotor is an important part of the motor, and there are many types. The number of slots and commutator pieces of the common armature rotor ranges from three to dozens of pieces, and the number of turns of each coil unit ranges from one to several hundred. Turns are not equal, the winding process of the rotor coil is also divided into single-wire double-winding type, double-wire single-winding type, single-wire multiple winding type, etc. During production and manufacturing, there will be virtual welding, poor welding, disconnection, decoupling, hooking, insulation, etc. Bad, poor surge, wrong wire diameter turns and many other bad phenomena.

Common armature rotor tester on the market have limited testing capabilities, and generally can only test obvious faults such as coil short circuit or breakdown, and cannot distinguish small virtual welding phenomena, which will cause long-term defect rates of armature rotors shipped out of the factory. At a relatively high value, it will increase the after-sales cost of the motor manufacturer, and will also hit the brand effect of the company.

In response to this phenomenon, the armature rotor tester developed by AIP is suitable for online and offline testing of various types of armature rotor motor performance, and can be used for batch testing of power tool motors, garden tool motors, vacuum cleaners, small household appliances, brushless motors and brush motors in various industries.

The test items of the armature rotor tester include welding resistance, bar-to-bar resistance, diagonal resistance, insulation resistance, AC hi-pot, and surge.

1. Welding resistance

Weld resistance testing is extremely important. False welds often occur during the production of armature rotors. The tester mainly tests the resistance value of the welding point between the commutator segment and the winding. The tester will automatically evaluate the welding quality, find out the false solder joints and mark the defective products .

2. Bar-to-bar resistance

Test the coil resistance value between adjacent or separated two pieces of commutator, you can find short circuit between coil turns, disconnection, decoupling, wrong hook direction, poor number of turns, short circuit between commutator pieces, etc., no need to use the same product Multiple tests are performed with high precision.

3. Diagonal resistance

The diagonal resistance test is to test the coil resistance value between two commutators separated by 180°. It can detect the short circuit between enameled wires between different coil units.

4. Insulation resistance

Apply a certain DC voltage between the coil winding and the iron core, measure the insulation resistance of the rotor, and detect whether there is leakage or a short circuit between the coil and the iron core.

5. AC hi-pot

Apply an AC voltage of a specified value between the coil winding and the iron core for a certain period of time to test the AC dielectric strength to test whether there is a short circuit, breakdown and flashing.

6. Surge

Impulse voltage with a certain amplitude and a certain waveform is applied between two adjacent or non-adjacent commutator segments to detect whether there is poor insulation or a short circuit between coil turns and commutator segments, and can also inspect windings Part of the de-embedding, whether the coil resistance is out of tolerance.

AIP focuses on global motor testing. It has been deeply involved in the motor testing industry for 30 years. It understands the problems of motor testing in various industries and insists on developing new products and new projects. More information on armature rotor testers in the industry can be found on the official website. For any related questions, please feel free to contact us. !

This article was originally written by AIP, which focuses on global motor testing, all rights reserved, infringement must be investigated, please indicate the source for reprinting.