China tests its first PM propulsion motor for nuclear submarines

China successfully tested its first permanent magnet propulsion motor for naval vessels on Oct. 18, China Military Online reported citing the state-owned China Shipbuilding Industry Corporation (CSIC).

The testing was conducted by the No. 712 Research Institute of the CSIC in Sanya City in south China’s Hainan Province. The CSIC is known for manufacturing China’s first aircraft carrier and the Jiaolong submersible vessel.

The company announced, on its official WeChat public account, that all the performance indicators of the system met the technical requirements. China’s development of PM motor started in the 1990s and the current successful tests lay solid foundation for more advanced tests in the future.

The permanent magnet motor will reportedly reduce the noise-levels of Chinese Navy submarines including the nuclear-powered ones. According to reports, the Chinese nuclear submarines is expected to become one of the world’s quietest ones.

It is said that the permanent magnet motor will greatly improve the mute performance of China’s submarine, especially nuclear submarine, which means that, with the newly developed permanent magnet motor, the Chinese nuclear submarine is expected to become one of the world’s quietest ones .

The report added that the country has the complete intellectual property rights (IPR) on the technology.

The CSIC didn’t disclose the type of the submarine using the permanent magnet motor or the performance of the permanent magnet propulsion motor.

The motor is supposed to be installed on China’s homegrown conventional attack submarines (SSK), even though China has nuclear-powered ballistic missile (SSBN) and attack (SSN) submarines, and Russian-made Type 636 Kilo-class SSKs at its naval base in Sanya.

According to experts, permanent magnet propulsion motor technology can replace the reduction gears and significantly reduce the running sound to the lowest possible level, the expert said.

On the global scale, the permanent magnet motor will have the power to meet the needs of full electrical movement for nuclear submarines.

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