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Help CenterHigh Precision Stator Tester for DC / BLDC / AC Motor Insulation Resistance Test
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The motor stator is the core component of a motor; the insulation properties, electrical parameters and winding process of the stator windings directly determine the motor’s service life, safety and operational stability. Defects such as short circuits, open circuits, inter-turn breakdowns, poor insulation and resistance deviations can all lead to quality issues such as overheating, abnormal noises, burnout and electrical leakage, and are the most common sources of defects in motor production.
Hangzhou Changniu Technology Co., Ltd.’s comprehensive motor stator test bench is a one-stop electrical performance testing system specifically designed for the stator windings of various single-phase, three-phase, DC, brushless and new energy motors. The equipment integrates comprehensive testing of withstand voltage, insulation resistance, inter-turn impulse, DC resistance, inductance, continuity, and short-circuit/open-circuit conditions. A single connection completes the full suite of tests, accurately screening for stator winding process defects and preventing defective products from entering subsequent production stages. It is the core equipment for mass production quality inspection, incoming material inspection, new product development, and mandatory factory-exit testing of motor stators.
Core Test Items
DC Resistance Test: Precisely measures three-phase resistance balance and winding resistance deviations, identifying issues such as incorrect turn counts and wire gauge discrepancies
Insulation Resistance Test: Assesses the insulation performance between windings and the housing, identifying potential risks of leakage and insulation ageing
AC Withstand Voltage Test: High-voltage breakdown testing to identify weak points in the insulation, eliminating the risk of breakdown during high-voltage operation
Turn-to-Turn Impulse Withstand Voltage Test: Identifies subtle turn-to-turn short circuits, inter-layer insulation failures and winding defects—hidden faults undetectable by standard equipment
Inductance Test and Phase Detection: Verifies whether winding direction, turn count and magnetic circuit matching meet specifications
Continuity and Short-Circuit/Open-Circuit Detection: Rapidly identifies broken wires, loose connections and short circuits caused by wire contact
Automatic Pass/Fail determination, data storage and report export: Full data traceability, compatible with quality control systems
Core Product Advantages
① Comprehensive testing with a single unit, high testing efficiency
Eliminating the cumbersome operations of traditional single-function testers, a single device covers all electrical performance tests for the stator. All test items are automatically completed with a single connection, with each test taking only a few seconds, significantly enhancing production line testing efficiency and suitable for both sampling and full inspections of mass-produced stators.
② High-precision testing, leaving no hidden defects undetected
Utilising high-speed sampling and dedicated algorithms, it delivers high precision and excellent repeatability for resistance, inductance and withstand voltage data; a dedicated turn-to-turn impulse test function accurately identifies hidden defects such as minor turn-to-turn short circuits, insulation damage and winding irregularities, eliminating motor post-sales faults at source.
③ Suitable for all types of motor stators
Compatible with testing stator windings for DC motors, brushless motors, AC induction motors, servo motors, new energy vehicle motors, fan and vacuum cleaner motors, and micro-precision motors, meeting stator testing requirements across all industries including domestic, industrial, new energy, and precision instrumentation.
④ Intelligent, fully automated operation with zero learning curve
Equipped with intelligent testing software featuring built-in standard test parameter templates, supporting one-click initiation of automatic testing, automatic parameter comparison, and automatic pass/fail determination. Test data and waveform curves are displayed in real time, making operation simple and accessible without the need for specialised technical personnel.
⑤ Traceable data, suitable for standardised factory quality inspection
All test data is automatically archived and categorised, supporting Excel/PDF report export, batch queries and data comparison. It can be integrated with factory MES systems to meet the needs of modern factories for quality traceability, system audits and customer factory inspections.
⑥ Safe and stable, suitable for long-term, high-intensity use in production environments
The equipment features built-in high-voltage protection, short-circuit protection, earth leakage protection and emergency shutdown functions to eliminate testing safety hazards; the unit boasts a stable structure and low failure rate, supporting 24-hour uninterrupted batch testing, with high durability and simple maintenance.
Scope of Application
Full factory inspection of stators for all types of industrial motors, domestic motors and micro-motors
Stator testing for new energy vehicle drive motors, servo motors and stepper motors
Quality screening of motor stators for fans, water pumps, vacuum cleaners and power tools
Incoming inspection of stators and spot checks on outsourced products at motor component factories
Process validation, parameter benchmarking and rectification testing of new stator designs in R&D laboratories
Teaching and type testing for third-party testing organisations and university laboratories
After-sales Support
Hangzhou Changniu Technology Co., Ltd. has specialised in the R&D and production of motor testing equipment for many years. We independently develop the hardware and software for our stator testing systems, catering to a wide range of non-standard stator testing requirements. We can customise bespoke solutions based on customers’ product dimensions, voltage specifications and testing standards. We provide on-site installation and commissioning, operator training, warranty and repair services, as well as lifetime software upgrades and technical support, ensuring a worry-free purchasing experience and peace of mind during use.
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