Automatic Armature Test System

Resistance Test (End-to-End and Bar-to-Bar):
The resistance test reads all of the 180A resistance readings at each 180A pair of commutator bars. Every reading is compared to the internally stored low and high resistance limits. This tester features ambient temperature compensation, which allows for fluctuations in the room temperature. Resistance readings are compensated to 25A Celsius.

Resistance testing will detect errors such as broken wires, stretched wires, open coils, wrong number of turns and wrong wire size.

Surge Test:
JRS surge test is far superior to the competition. We are able to stress the windings with a greater amount of energy, enabling the most sensitive of shorts to be detected.

A capacitor is discharged into the windings. The system monitors and analyses the surge waveform by measuring the ringing time and amplitude of the characteristics ringing waveform.

This surge test will reject windings and insulation faults such as shorts between windings and breakdowns between wires. It also detects incorrect turn counts, shorted turns and improper connections.

Chips between the commutator bars can also be detected. If a chip is touching both bars, the weld and resistance tests will detect the fault. However, if the chip is wedged in and not touching both bars, JRS surge test will detect this.