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Armature Testing Machine

Armature Testing Machine

Product Details:


Price And Quantity

  • 1 Unit

Trade Information

  • Cash Advance (CA), Cash in Advance (CID), Cheque
  • 2 Unit Units Per Month
  • 2 Week
  • Wooden Boxes.
  • Asia, Australia, Central America, North America, South America, Eastern Europe, Western Europe, Middle East, Africa
  • All India

Product Description

Armature Testing Machine

The tester is manufactured for testing the armature for 100% production in assembly line. This Armature Testing Machine has the capability to test the armature resistance between the commutator segments (Resistance test), insulation between copper & iron (Flash Test) and in-turn shorts between the windings (Layer Test).

The tester rig mainly consists of a control panel, mechanical table & fixture, PLC with MMI. Probe blocks are operated by pneumatic cylinders for resistance, high voltage and surge test. HV and surge tests are conducted in same probes and are designed accordingly. Probes are brought in and out based on the test being conducted and these contacts are automatically operated by pneumatic cylinders. The mechanical jig consists of a fixed fixture mounted on an aluminium extrusion table. A pneumatic cylinder requires 4 to 6 bar of clean and moisture free compressed air. The jig is electrically connected with control panel using metal connectors. The equipment is provided with an electric power of single-phase 230V, 15A capacity with standard earth.

Resistance test

The Resistance test is conducted to measure the Bar to Bar resistance and Weld (joint) resistance. The resistances are measured based on the classic Kelvin four-wire principle. In this test the armature is subjected to two currents namely main current and compensating current. The measuring coil has been electrically isolated from rest of the coils in armature with the help of main current and compensating current based by kirchoff’s law. Test current is applied to the armature coil between two adjacent segments and compensating current will be subjected to opposite adjacent segment. Hence, it compensates main current. The voltage drop across the bar to bar is called coil voltage and the drop across the bar and adjacent bar is called Joint voltage. The coil & joint voltages are measured and the resistances are calculated as per ohms law. Bar to bar resistance and Weld resistance is compensated with temperature.

Layer test

This test is conducted for measurement of winding imbalances such as inter-turn shorts, loose winding design. Because of these factors, the inductance of the winding gets varied. This may leads to damage the insulation of the windings. The capacitor is charged to a desired DC voltage. The charged power is discharged through armature winding, which is an inductance. The capacitance and an inductance in the winding produce oscillation. This oscillation will die both amplitude and frequency then compared with master waveform. If the component oscillation coincidences with master waveform, then result will displays as pass else displays as fail.

Flash test

This flash test is conducted to test the insulation between coil and iron of the armature. Here the test piece is subjected to high voltage. It is applied between the commutator and shaft of armature. A small leakage current will flow in terms of milli-ampere and it is measured to determine insulation resistance. The measured value is compared with the master value, If it coincidences with master value then result is displayed as pass else displayed as fail.

The salient features of our equipments.

  • The testing process is automated and made simple to handle
  • Detects and locates fault
  • Easy and rapid operation
  • Combines several tests in one equipment
  • Tests electrical defects in components
  • Display defects and result of testing
  • User friendly and simple to operate

Auto mode of operation

  • Load the armature manually
  • Start the test using start key
  • Armature clamped automatically
  • Orientation takes place automatically
  • Plunger forward on to read
  • Coil resistance reading & stored
  • Joint resistance reading & stored
  • Indexing for next test
  • Step 5 to 8 repeated for the corresponding coils
  • Results declared for coil resistance test, joint resistance test
  • Surge test switched on
  • Plunger forward on to conduct test
  • Surge test conducted
  • Indexing for next test.
  • Step 12 to 14 repeated for corresponding coils.
  • Results declared for surge test.
  • Flash test switched on.
  • Plunger forward on to conduct test
  • Flash test conducted
  • Result declared for flash test
  • Final result declared
  • If the result is passing then stamping provided.
  • If the result is failing then Armature unclamped till reset.
  • Next cycle interlocked with Rejection Bin

Test rig indicates the following

  • Coil resistance for all the coils.
  • Joint resistance for all the coils.
  • Current through the coil under test.
  • Ambient temperature.
  • Individual Coil resistance with Pass/Fail Indication.
  • Individual Joint resistance with Pass/Fail Indication.
  • Surge Test with Pass/Fail Indication.
  • Flash Test with Pass/Fail Indication.
  • Armature Final result with Pass/Fail Indication.

Technical Specifications:

Input Supply

Single phase 230V AC +/- 5% 50Hz.

Control Voltage


Air pressure

4- 6 bar moisture free air.

Armature Segment

5 to 36 segments

Coil & Joint Resistance Test

Test Current

1 Amps

Current Range

0.5 – 1.5 Amps

Coil resistance range

10 – 999.9 milliohms


+/- 1milliohm or 1% of the value read whichever is higher.

Joint resistance range

0.01 – 1.999 milliohms


+/- 0.02 milliohm or 1% of the value read whichever is higher.

High Voltage Test

Test Voltage

500 V AC

Voltage Range

100 – 1000V AC


+/- 25V or 2% of the value read whichever is higher.

Current Range

9.99 milli amps.


+/- 0.2 milliamps or 2% of the value read whichever is higher.

Surge Test

Test Voltage

500V DC

Voltage Range

300 – 1000V DC


+/- 25V or 2% of the value read whichever is higher.


* Tips on getting accurate quotes. Please include product name, order quantity, usage, special requests if any in your inquiry.

#3,3rd Cross, Ramakrish reddy layout, Behind HP Software, Mahadevapura, Bengaluru - 560048, Karnataka, India
Mr Suresh Sunmugam (Proprietor)
Mobile :+919739227744, +919743397779
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