The first set permanent magnet motor for shield tunneling machine in the world independently developed and manufactured by CRRC Zhuzhou Electric Co., Ltd has successfully operated for a whole year in Wuhan No.2 metro line. Based on the extraordinary performance and reliability quality of our product, our company gets an order of 10 million from China Railway Construction Heavy Industry Co.,Ltd.
At present the shield tunneling machine is usually driven by three-phase asynchronous motor. The permanent magnet motor for shield tunneling machine independently developed and manufactured by CRRC Zhuzhou Electric Co. makes innovation of the previous driving mode and enables a significant change and break-through in the field of shield tunneling machine. The permanent magnet motor installed in shield tunneling machine inherits such excellent performance of permanent magnet traction motor for high-speed railway as energy-saving, high-efficiency and reliability and is more light in weight, smaller in size and easier to maintain compared to three-phase asynchronous motor of the same power. For example, the shield tunneling machine under current operation with a diameter of 6 m and total power of 1056 KW is 10 % more efficient than those with asynchronous motors, saving electricity of over 100 KW/h.