AIP, a leading motor tester brand, has recently completed the delivery of a customized Partial Discharge (PD) Tester for a domestic new energy vehicle (EV) motor manufacturer.

Originally launched in 2021, this PD motor tester has now exceeded 200 units installed worldwide, marking a major milestone in replacing imported high-end motor tester. Today, AIP is widely recognized as one of the top motor tester brands in the global market.

Ⅰ. Industry Challenges in High-Voltage Motor Insulation Testing

In high-voltage drive motors, even minor insulation defects can trigger partial discharge (PD) under operating voltage. Although PD signals are weak and intermittent, long-term discharge can severely degrade insulation, eventually leading to surge short circuits or complete motor failure.

Manufacturers often face the following challenges during production testing:

1. Conventional motor testers lack sensitivity to early-stage insulation defects

2. Short-term stress tests fail to reveal hidden insulation weaknesses

3. Complex electromagnetic interference masks real PD signals on production lines

4. Low system integration increases maintenance cost and reduces reliability

These issues highlight the urgent need for a high-performance PD motor tester designed specifically for modern electric motors.

Ⅱ. AIP’s System-Level Motor Testing Solution

To address these industry-wide challenges, AIP has developed a fully integrated PD motor tester solution, combining advanced testing technology with real-world production requirements.

1. Dual PD Testing Methods for Accurate Detection

The tester integrates Pulse PD (PDS) and Sinusoidal PD (PDH) testing methods, supporting both ramp-up voltage and fixed-point testing modes.

Key parameters such as PDIV, RPDIV, PDEV, and RPDEV can be accurately measured, enabling detection of hidden defects, including:

· Coil-to-core contact

· Incorrect wiring connections

· Hairpin winding contact faults

This dual-method design significantly improves detection accuracy compared with conventional motor testers.

2. High Integration for Maximum Efficiency

With only one wiring connection, the AIP motor tester can complete:

· Surge test (interturn)

· Partial discharge testing

· AC / DC withstand voltage tests

· Insulation resistance measurement

· Winding resistance and inductance tests

This all-in-one design dramatically increases production efficiency and reduces overall testing costs.

3. Dual Detection for Strong Anti-Interference Performance

The system adopts a combined antenna method and capacitive coupling method:

· The antenna method captures electromagnetic PD signals with high sensitivity

· The capacitive coupling method provides superior stability and noise immunity, especially during sinusoidal PD testing

· The dual-path architecture ensures reliable PD detection even in complex industrial environments.

4. Intelligent Design for Smart Manufacturing

Designed for Industry 4.0 environments, the AIP motor tester features:

· Intelligent self-diagnostics

· Remote fault diagnosis

· Online software upgrades

· Modular plug-in structure for easy maintenance

· Network interfaces for data sharing and IIoT integration

Ⅲ. AIP — A World-Class Motor Tester Brand

Today, AIP PD Motor Testers are widely deployed in EV motor production lines and R&D laboratories worldwide.

Our testers are trusted by globally renowned manufacturers, including:

Volkswagen, BYD, Schaeffler, BorgWarner, and many more.

As technology continues to evolve, AIP motor testers are expanding beyond NEV applications into aerospace, rail transportation, and other high-end equipment manufacturing sectors.

With proven performance and continuous innovation, AIP has firmly positioned itself among the Top 10 Motor Tester Brands globally.

Looking for a Reliable Motor Tester Brand?

If you are searching for a high-precision partial discharge (PD) tester or a trusted motor tester brand for EV motors or industrial applications, AIP is your ideal partner.

Contact AIP today to discover how our motor testing solutions can enhance your production quality and reliability.