Development of hub motors
1 technical status
The wheel motor was first put into a pure electric vehicle from Porsche in 1900. After more than 100 years of development, not only many American and Japanese OEMs have increased the development of wheel motors, such as the British company Protean, France TM4, etc. Tire companies (Michelin, Bridgestone) have also developed wheel hub motors. Domestically, Wanan Technology and the British Protean joint venture, Asia Pacific shares and Slovenian wheel hub motor company joint venture to develop wheel hub motor products. Main wheel hub motor products and parameters at home and abroad
2 advantages and disadvantages analysis
Overall, permanent magnet synchronous motors are widely used in hub motors. In recent years, domestic and foreign vehicle and component companies have carried out many attempts to drive pure electric and hybrid passenger vehicles with wheel hub motors. The advantages and disadvantages of hub motors are known by comparison.
3 performance improvement measures
The main problem facing the performance of the hub motor is the impact of the unsprung mass on the comfort and handling; the heat dissipation problem and the brake energy recovery after integration with the hub, and the resulting shock, waterproof and dustproof Wait. Main technical means and countermeasures for improvement
4 development prospects
The different attitudes of different industry bodies to the hub motor make the development prospect of the hub motor is not ideal. The new energy main engine factory is mainly on the side of the hub motor. The traditional motor company has not yet developed and planned the hub motor. Only some joint venture motor companies promote the hub motor, which lacks the support of mature mass production vehicles. At the same time, the hub motor The high cost and system complexity have not been solved, which significantly restricts the development of hub motors in the field of new energy passenger vehicles.
Future drive motor development trend analysis
Through the above analysis and market research, it can be seen that in the pure electric passenger vehicle market in the next few years, the permanent magnet synchronous motor will still occupy the mainstream, and the matching of AC asynchronous motor will shrink year by year. With the gradual maturity of the hub motor technology and the cost down, its matching amount in the pure electric passenger vehicle market will increase. The switched reluctance motor is limited by volume and noise, and is applied to the passenger in a short time. The possibility of using a car is small.
According to the analysis of the “Technology Roadmap for Energy Saving and New Energy Vehicles”, the development roadmap of the drive motor is shown in Table 7. In general, the main trends in drive motors include the following: integration – covering the integration of power electronic controllers and electromechanical coupling; efficiency – increasing power density and reducing costs; intelligent and digital – and The controller works together to continuously improve the performance of the drive system.
