3.2 High torque high power motor
The development of heat-resistant and high-magnetic properties NdFeB permanent magnet materials will make it an important application in high-power permanent magnet synchronous motors. In the transportation industry and industry, such as electric vehicles, hybrid (internal combustion engines and electric motors), electric vehicles, trains, elevators, machine tools, robots, etc., the demand for high-power motors is growing.
Ship propulsion motors require low speed and high torque. In 1986, Siemens Germany developed a 1095 kW, 230 r/rain six-phase permanent magnet synchronous motor for the propulsion of ships. Compared with the DC motors used in the past, the volume can be reduced by about 60%, and the loss can be reduced by about 20%. . In addition, 1760 kW permanent magnet synchronous propulsion motor is installed in U. The 212 submarine trial has a 40% reduction in length and effective volume compared to conventional DC propulsion motors. Swiss ABB has built more than 300 electric propulsion ships with a maximum installed capacity of 2X19MW. The 400kW to 3MW permanent magnet synchronous motor developed by it has been used for: "Com-paetA~ipod" pod-type electric propulsion system. The prototype of the 400kW, 500r/rain permanent magnet motor developed by France Thermal Industry Company in 1987 has also reduced the volume by 40% compared with the DC motor. In 1996, 12-phase, 1800kW, 180r/rain permanent magnet propulsion motors and control devices have been developed and all real ship tests. In the same year, the UK exhibited the design model of the "HNA" light stealth frigate. The ship is equipped with two 21MW permanent magnet synchronous motors that directly drive the propeller during cruising or stealth.
