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Recently, EPS (Electrical Power Steering) is being widely applied in order to reduce fuel consumption and decrease installation problems of the power steering system. EPS also decreases development time and cost of the steering system due to its ease of tuning. As we mentioned in the former paper “2000-01-0824”, the larger output motors are required. Upon developing the higher output motors, Mitsubishi realized that the EPS Systems brought about high acoustic noise, vibration, large torque ripple and friction loss. We have developed a very silent motor based on our unique technology. This involved a very unique electromagnetic force and mechanical vibration analysis method. Our super silent motor is so quiet, that the occupants of a vehicle can not distinguish the motor noise even when the motor is installed in the vehicle cabin.

Recently, EPS (Electrical Power Steering) is being widely applied in order to reduce fuel consumption and decrease installation problems of the power steering system. EPS also decreases development time and cost of the steering system due to its ease of tuning. Applying EPS technology to vehicles presents some challenges. The required output level of the motor is very high and causes high acoustic noise, excessive vibration, large torque ripple and large frictional losses. We have developed a very silent motor based on our unique technology. This involved a very unique electromagnetic force and mechanical vibration analysis method. Our super silent motor is so quiet, that the occupants of a vehicle can not distinguish the motor noise even when the motor is installed in the vehicle cabin.