Partial Discharge Test Solution for New Energy Vehicle Drive Motor

Industry Background

Amid global warming and growing demand for new energy vehicles, the penetration rate of rapidly developing new energy vehicles (NEVs) continues to rise, gradually dominating the market. Consequently, NEV drive motors are entering a golden period of growth.

Application Requirements

As the drive motor industry evolves towards higher voltages and higher frequencies, the potential for partial discharge (PD) within motors has significantly increased. Although the intensity of these discharges is relatively weak and difficult to detect, their long-term accumulation can accelerate insulation aging, ultimately leading to interturn short circuits and shortening the motor's service life. Consequently, drive motor manufacturers are placing increasing emphasis on detecting PD in their products.

Testing Difficulties

1. Conventional test instruments cannot detect minor PD phenomena such as insulation defects and uneven insulation.

2. The mixing of interference signals in the production workshop and PD signals from the DUT results in highly unstable PD test results.

3. PD is intermittent, pulsed, and the discharge signal is very weak, making it difficult to detect.

4. The low excitation energy of PD testers, coupled with dielectric loss and other factors, prevents the detection of insulation defects deep within or at the ends of the stator windings. 5. Partial discharge functionality cannot be integrated into comprehensive test systems, as modules in these systems are susceptible to damage and can interfere with partial discharge testing.

Solution

Ainuo Instruments has been deeply involved in motor testing for many years and is deeply aware of the pain points of partial discharge testing. To address this testing challenge, the company has specially developed and launched the AN8A10-PD partial discharge tester. This product utilizes ultra-high frequency (UHF) partial discharge detection technology to accurately capture partial discharge signals from the product under test, providing customers with precise and reliable test data.

The AN8A10-PD series offers high performance, high reliability, and a unique UHF measurement and detection solution. It supports both turn-to-turn PD (DC-PD) and withstand voltage PD (AC-PD), integrates channel switching, and automatically completes all tests with a single wiring connection. It can also test PDIV, RPDIV, PDEV, RPDEV, and corresponding voltage-discharge phase diagrams.

Product Advantages

High Performance: High signal-to-noise ratio and recognition algorithms effectively identify discharge signals buried in noise, enabling highly sensitive partial discharge testing and ensuring that every detail of the product's discharge is captured. High Reliability: Proven performance under rigorous operating conditions and millions of tests in complex environments.

Exclusive Solution: Provides an industry-exclusive UHF metrology and testing solution.

Pain Points Addressed

1. Conventional test instruments cannot identify minor partial discharge (PD) phenomena such as insulation defects and uneven insulation.

2. Interference signals in the production workshop mix with the PD signals from the DUT, resulting in extremely unstable PD test results.

3. PD is intermittent, pulsed, and the discharge signal is very weak, making it difficult to detect.

4. The PD tester's excitation source energy is low, and factors such as dielectric loss prevent it from identifying insulation defects deep within or at the ends of the stator winding.

5. PD functionality cannot be integrated into integrated test systems, making modules in these systems susceptible to damage and interfering with PD testing.

Conclusion

To address the testing challenges faced by the new energy drive motor industry, Ainuo has leveraged its technological advantages to develop and launch the AN8A10-PD series of PD testers. This series utilizes ultra-high frequency (UHF) partial discharge detection technology to accurately capture the partial discharge signals of the product under test, providing customers with precise and reliable test data. This effectively addresses the challenges of the new energy drive motor testing industry and has been well received by numerous customers in production line application tests.