With the continuous development of the electric vehicle industry, related technologies such as electric motors used in electric vehicles are also constantly improving. Due to the shortage of raw materials in the market, many manufacturers have begun to develop faster electric vehicle drive motors. This is mainly because the faster the drive motor rotates, the smaller the motor volume, which is conducive to reducing the consumption of raw materials.
A research team at the University of New South Wales (UNSW) in Australia has recently developed a new high-speed electric motor that can achieve a speed of 100,000 revolutions per minute. The researchers say the new electric motor achieves a maximum power and rotational speed that exceeds existing laminated permanent magnet synchronous motors (Interior Permanent Magnet Synchronous Motors), making it the world's first electric motor built with commercially available laminate materials. The fastest laminated permanent magnet synchronous motor.
The team's Dr. Guoyu Chu said that the development trend of electric vehicles is to carry a motor at a faster speed. As the speed of the motor increases, the weight of the motor can be further reduced, and the energy consumption is also less. Therefore, this is conducive to improving cost reduction and improving the battery life of electric vehicles. The new motor has reached 100,000 revolutions per minute, with a peak power density of about 7 kilowatts per kilogram, he said.
Dr. Chu said the electric motor system is scalable and can be adjusted for power and speed, and it would take about 6-12 months to adjust the electric motor to fit a Tesla electric vehicle.
The output power of the motor is determined by the product of torque and rotational speed. Under the condition of constant output power, the higher the rotational speed, the smaller the torque of the motor. The torque can be divided into the radius of the motor and the force applied to the motor. When the force applied to the motor remains unchanged, the smaller the torque, the smaller the radius of the motor, and the smaller the motor can be.