Engine Rotor testing machine MICROTEST MT-6910 (8 Channel)

Engine Rotor testing machine MICROTEST MT-6910 is capable of setting up all measurement parameters and provides 8 test channels.

The external PC software allows for real-time data retrieval from the 6910, generating reports, or directly uploading test results to a database.

I. Specification of Motor Stator testing system MICROTEST MT-6910 (8 Channel)

Engine Rotor testing machine MICROTEST MT-6910 (8 Channel) integrates the Interlayer Short-Circuit Tester (6910), the High Voltage Withstand Tester (7605), and the LCR Tester (6365), with the 6910 serving as the main controller.

This MICROTEST MT-6910 (8 Channel)  all-in-one integrated system covers safety compliance, high-voltage insulation, and coil interlayer short-circuit testing for motor stators. It can measure motor stator polarity (rotation test) using precise four-wire resistance measurement technology.

Additionally, Engine Rotor testing machine MICROTEST MT-6910 supports three-phase current balance testing (optional). The system can be equipped with PC connectivity software for data storage and can be configured with PLC control. Customized test fixtures can be provided for specific customer stators.

Furthermore, MICROTEST MT-6910  offers an optional LCR Meter for measuring the stator's inductance values with a test frequency range of 10Hz to 200kHz, supporting three-phase balanced inductance testing.

• Hipot/Leakage Current
• Insulation Resistance
• Winding Layer short Test
• Three-Phase Current Balance Test(Option)
• Steering test
• Inductance Test
• It can test multiple sets of DUTs simultaneously
• 4-Wire DC Resistance measurement will be more accurate than others
• The Impulse/Surge with waveform comparison is a non-destructive analysis
• Chinese/English screen could be switched arbitrarily.

II. Main function of Engine Rotor testing machine MICROTEST MT-6910 (8 Channel)

Stator Coil/Core:

• The purpose of Stator core is to be part of the magnetic route and the place to fix the Stator coil. This core is made of couple 0.5mm silicon steel sheets. To lower the magnetic loss, the core will cover by insulating paint to isolate each piece. There are couple sockets in the core to fix the Stator coil.
• Stator coil is an important component of motor. The purpose is to create inductance by current. There are single layer and double layers on the iron core.

Motor Stator test:

• Uneven DCR happen in 3-phase motor, this will cause uneven rotate.
• MICROTEST MT-6910 4-Wire DC Resistance measurement will be more accurate than others.

Customized test fixture for Stator coil:

For Enameled Winding of Motor:

• Conduct coil’s quality issue.
• Layer short between winding
• Short on cross winding
• Pin short
• Insulation defect.

Motor Stator testing system MICROTEST MT-6910 is One-Step-Test Function: Low Voltage Electrical Test + Hipot Test  + Layer Short.

Important Parameter for Quality of Coil:

• Regular motor is winding on Silicon steel sheet
• Prevent the electricity from enameled wire to motor
• Put a insulation material on silicon steel sheet
• Insulation paint on enameled wire
• Short might happened while the current is passing the defect winging coil.

Introduction of Impulse tester:

• Impulse Winding Tester use the comparison of pulse to measure the DUT. The instrument provide high voltage to do the instant pulse test and record the wave. Compare with the golden sample to define the product.

Why do we need impulse tester for producing motor/transformer?

• Impulse Test = Quality and product life test
• The small defection is hard to find at low voltage test station. As the DUT goes to the final assembly test, the defect may show up. This will higher the cost of production.
• Motor and transformer usually work under high voltage. If we add impulse test in the product line, this may prevent the malfunction or burn on motor.

Technology of Detect layer short:

“Pulse voltage and waveform comparison” is the way we detect layer short. The pulse voltage is non-destructive/instant voltage that apply on both side of winding and detect the DUT without damage it. By compare the wave with the golden sample, we can judge the DUT.

Damping wave under L/C resonate comes from the feature change of defect coil.

• Inductance of coil
• Q rate
• Turn ratio of coil(voltage different)
• Material of core
• Layer short in the coil.

By comparing the wave of damping attenuation between golden sample and DUT:

Provides 5 waveform comparison:

• Total area comparison
• Differential area comparison
• Wave comparison
• Flat comparison
• Corona comparison.

Technical specifications of Engine Rotor testing machine MICROTEST MT-6910 (8 Channel)

MICROTEST stator testing solution can be tailored into a complete testing system based on different requirements. Firstly, you can evaluate whether to opt for a rack-mounted or desktop configuration, as well as whether to incorporate PC connectivity.

System: