MT-6910 Motor Stator Test System

The Microtest MT-6910 Motor Stator Test System is a dedicated multi-channel test platform for comprehensive electrical verification of motor stators during production. Available in three channel configurations — the MT-6910 (8 channels), MT-6913 (13 channels), and MT-6917 (17 channels) — the system tests winding resistance, hipot withstand, surge comparison, inductance, and insulation resistance across all stator windings in a single automated test cycle.

Model Comparison

Model	Channels	Typical Motor Types
MT-6910	8	Small BLDC, single-phase induction, 3-phase up to 8 coils
MT-6913	13	Medium BLDC, automotive EV traction motors, multi-coil designs
MT-6917	17	Large EV stators, high-pole-count BLDC, complex winding patterns

Test Parameters

Test	Purpose	Detection Capability
Winding Resistance (DCR)	Copper continuity, crimp integrity	Open circuits, high-resistance joints
Hipot Withstand (AC/DC)	Dielectric strength	Insulation breakdown, contamination
Surge Comparison	Turn-to-turn insulation	Shorted turns, layer shorts
Inductance	Winding symmetry, correct turns count	Missing turns, wrong wire gauge
Insulation Resistance	Winding-to-frame isolation	Moisture ingress, surface contamination
Phase Balance	Inter-phase symmetry	Winding asymmetry, manufacturing variation

Specifications

Feature	Specification
Test Channels	8 / 13 / 17 (model dependent)
Winding Resistance	4-wire Kelvin, milliohm resolution
Hipot Voltage	Programmable AC/DC
Surge Voltage	Programmable impulse with waveform comparison
Inductance	Multi-frequency measurement
Insulation Resistance	Megohm-range measurement
Switching	Electronic multiplexing across all channels
Cycle Time	Seconds for complete multi-parameter sequence
Interface	Handler, RS232/USB, barcode reader
Safety	Interlock, fixture sense, emergency stop

EV Motor Production

The rapid growth of electric vehicle manufacturing in India has created demand for high-throughput stator testing that can verify winding integrity across all coil groups in a single fixturing. The MT-6910 series addresses this need with electronic channel multiplexing that routes test signals to each winding group without manual reconnection. A typical EV traction motor stator test cycle measures winding resistance on all phases, applies surge test voltage for turn-to-turn insulation verification, performs hipot between phases and phase-to-frame, and measures inductance for winding symmetry — all in a single automated sequence lasting seconds.

Surge comparison testing is the critical test for detecting shorted turns that DC resistance and inductance measurements cannot reliably find. The system applies a controlled impulse voltage to each winding and compares the resulting damped oscillation waveform against a reference. Even a single shorted turn produces a detectable frequency shift and area change in the surge waveform, catching defects that would cause motor overheating and premature failure in the field.

BLDC Motor Testing

Brushless DC motor production for industrial automation, home appliances, power tools, and automotive auxiliary systems requires verification of all stator windings before rotor assembly. The MT-6910 series tests phase resistance balance, inter-phase insulation, phase-to-frame hipot, and surge integrity across all coil groups. The channel count selection matches the motor design — 8 channels for simple 3-phase designs, up to 17 channels for high-pole-count concentrated winding BLDC stators used in direct-drive applications.

Production Integration

Handler interfaces enable integration with automated stator loading systems, conveyor lines, and robotic cells. Barcode-triggered test program selection supports mixed-model production where different motor variants run on the same test station. Pass/fail results drive sorting mechanisms for automatic disposition of tested stators.

Watch the MT-6910 Motor Stator Test System on YouTube

GSAS Micro Systems provides MT-6910 series motor stator test systems with fixture design, test sequence programming, and production line integration services for Indian motor manufacturers serving EV, industrial, and consumer markets.