The new motor designed and built by the UNSW team is an improvement on the existing IPMSM (built-in permanent magnet synchronous motor), which is primarily used for traction drives in electric vehicles. Image credit: Guoyo Chu/University of New South Wales

Another option is to reduce the weight of the motor. A motor that spins at high speed can be reduced in size, which not only reduces weight but also reduces energy consumption and can increase the range of an electric vehicle with the same battery pack.

Conventional built-in permanent magnet synchronous motors (IPMSM) are used in electric vehicle traction drives, where magnets are embedded in the rotor to produce powerful torque. Existing IPMSMs suffer from low mechanical strength due to the thin iron bridge in the rotor, which limits their maximum speed. The researchers used a new rotor topology that not only improved the robustness of the motor but also reduced the number of rare earth materials required to produce the motor by 70%.

Using an artificial intelligence-assisted optimization program, the UNSW researchers evaluated various aspects of electrical, magnetic, mechanical and thermal performance to optimize the motor design.

The team evaluated 90 design options, then selected the top 50% of these to generate a new design and repeated the iterative process until the desired optimum was achieved. The last motor design, the 120th generation analyzed by the program, ultimately achieved an absolute maximum speed of 100,000 revolutions per minute and a peak power density of 7 kilowatts per kilogram, twice the high-speed record of existing laminated IPMSMs, making it the fastest IPMSM ever built.

In addition to electric vehicles, the motor can also be used in large heating, ventilation and air conditioning systems using high-speed compressors and high-precision CNC machines, or as an integrated drive generator deployed inside aircraft engines to power electrical systems.

The new motor also offers significant cost advantages over existing technologies. Most high-speed motors use a sleeve to strengthen the rotor, which is usually made of high-cost materials such as titanium or carbon fiber. The new rotor, on the other hand, is so mechanically robust that it does not require a sleeve and uses only about 30 percent rare earth materials, resulting in a significant reduction in cost and thus making the high-performance motor more environmentally friendly and affordable.

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A team of researchers at the University of New South Wales (UNSW) in Australia recently developed a new high-speed electric motor that can achieve speeds of up to 100,000 revolutions per minute, the newsroom reported. The researchers say the new electric motor achieves a maximum power and speed that exceeds that of existing laminated permanent magnet synchronous motors (Interior Permanent Magnet Synchronous Motor), making it the fastest laminated permanent magnet synchronous motor in the world built with commercially available laminated materials.

Dr. Guoyu Chu of the team said that the trend of electric vehicles is to have faster motors, and as the motor speed increases, the weight of the motor can be further reduced and less energy is consumed. Therefore, this is conducive to enhancing the reduction of costs and increasing the range of electric vehicles. He said the new motor has already reached 100,000 revolutions per minute, with a peak power density of about 7 kilowatts per kilogram.

Dr. Chu said that the electric motor system has scalability and can adjust power and speed, if you want to adjust the electric motor to fit Tesla electric cars, it will take about 6-12 months.

The output power of the motor is determined by the product of torque and speed, and the higher the speed, the lower the torque of the motor, while the output power remains the same. The torque, on the other hand, can be divided into the radius of the motor and the force applied to the motor. The smaller the torque, the smaller the radius of the motor and the smaller the motor can become, given that the force applied to the motor remains the same.

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The hybrid Civic is 4674/1802/1415 or 1420 mm in length, width and height respectively, with a wheelbase of 2735 mm, and is still positioned as a compact sedan.

The appearance of the car remains the same as the fuel version, in order to enhance its sense of identity and recognition, the car logo is embellished with blue elements, and the visual effect of the tailpipe is further weakened.

The interior is temporarily unknown, but with reference to the fuel version, it is expected to adopt a similar scheme, with 10.2-inch LCD instruments and a 9-inch central control screen, while retaining the delicate through-air conditioning vents, and the top model is also equipped with 12-speaker BOSE audio, etc.

The difference is that in order to reflect its hybrid model identity, the new car in the dashboard added a hybrid power system working status display bar, which can help the driver to control the vehicle information in real-time, but also highlights the identity mark.

Power, the car is equipped with a 2.0-liter naturally aspirated engine with direct injection and Atkinson cycle and other technologies, thermal efficiency of 41%, the maximum power of 105 kilowatts, depending on the model, 100 kilometers of fuel consumption were 4.39 liters, 4.47 liters and 4.51 liters, a relatively good performance.

As for the price of the car, frankly speaking, truly will not be cheap to where, conservative estimates also have to 16-17 million, if really so priced, you will buy?

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