The Armature Test Rig conducts the following test
1. Coil Resistance Test with Temperature and Current Compensation.
2. Joint Resistance Test with Temperature and Current Compensation.
3. Flash Test
4. Surge test
In this, a pair of two independent constant current sources connected across opposite pairs of armature windings through their respective commutator bars. The constant current sources are identical in output current and are connected in opposite polarity to minimize circulating current from flowing in other windings of the armature. The voltage drop across the coil divided by the current through the coil the resistance of the winding. The Coil Resistance is displayed and compared against the set limits and accordingly the results are declared.
This is the continuation of the Coil Resistance test, in this test, the drop across the adjacent coil to which the constant current is applied represents the Joint Resistance. The Final Joint resistance is displayed and compared against the set limits and accordingly the results are declared.
The Armature temperature is measured using a Ambient Temperature Indicator. The Ambient temperature is used to calculate the coil temperature at the specified temperature. When the temperature compensation is enabled, the set limits are compared against the temperature compensated value and accordingly the results are declared Hence the resistance being displayed is Current Compensated. Temperature Compensated.
In this test flash voltage of 500 Volts is applied across the Commutator segment and the armature core. A separate set of probes is used to connect the flash terminals to the armature under test. These probes are held using an acrylic probe holder which are in turn moved forward and reverse by a Pneumatic cylinder. The leakage current across the commutator segment and the core is measured and displayed this value is compared against the set limits and accordingly the results are declared.
01. Load the armature manually
02. Start the test using start key
03. Armature clamped automatically
04. Orientation takes place automatically
05. Plunger forward on to read
06. Coil resistance reading & stored
07. Joint resistance reading & stored
08. Indexing for next test
09. Step 5 to 8 repeated for the corresponding coils
10. Readings are sorted automatically for 1 to 12 coils
11. Results declared for coil resistance test, joint resistance test
12. Flash test switched on
13. Result declared for flash test
14. Final result declared
15. If the result is passing then stamping provided
16. Result is declared through speaker
17. Armature unloaded automatically
1. Coil resistance for all the coils
2. Joint resistance for all the coils
3. Current through the coil under test
4. Ambient temperature
5. Individual Coil resistance with Pass/Fail Indication
6. Individual Joint resistance with Pass/Fail Indication
7. Surge Test with Pass/Fail Indication
8. Flash/ Hipot Test with Pass/Fail Indication
9. Armature Final result with Pass/Fail Indication through Tower Lamp
| No. | Name | Description |
|---|---|---|
The details are subject to change and customizable to orders. |
||
| 1 | Applied Current |
• Maximum Readable Value : 1.999 Amps • Resolution : 0.001 Amps • Accuracy : 0.01 Amps |
| 2 | Coil resistance |
• Maximum Readable Value : 199.99 Milli ohms • Resolution : 0.01 Milli ohms • Accuracy : 0.02 Milli ohms |
| 3 | Joint resistance |
• Maximum Readable Value : 199.99 Milli ohms • Resolution : 0.01 Milli ohms • Accuracy : 0.02 Milli ohms |
| 4 | Flash voltage |
• Applied voltage : 500 to 1000 Volts selected manually • Current limiting : 20 milli amps • Maximum reading : 1000 volts • Resolution : 1 volt • Accuracy : 5 volts |
| 5 | Flash leakage current |
• Maximum Readable Value : 19.99 Milli amps • Resolution : 0.01 Milli amps • Accuracy : 0.1 Milli Amps |
| 6 | Temperature |
• Maximum Readable Value : 99.9 deg. • Resolution : 0.1 deg • Accuracy : 0.1 deg |
| 7 | Input Electrical Supply |
• Single phase AC • 230 volts +/- 10 % • Current maximum 10 amps • Overload fuse protected |
| 8 | Input Air Supply |
• Pressure of 4 to 6 bar for 8 mm hose input • FRL protection provided |
| 9 | Panel size |
• Depth 800 mm • Height 2000 mm • Width 600 mm • Air cooling provided by cooling fan • Powder coated finish |
| 10 | Fixture |
• Table height: 900 mm • Component loading height 1050 mm • Table Size: 600 mm Width X 400 mm Depth X 900 mm Height |