Motorcycle Starter Motor Comprehensive Performance
Motorcycle Starter Motor Comprehensive performance
With the development of China's industrial economy, motor has been widely used. According to statistics, the motor system power consumption accounts for about 60% of the national electricity consumption, of which the fan electricity accounts for 10.4% of the national electricity consumption, pump motor accounted for 20.9%, 9.4% of the compressor. However, more than 80% of China's motor products efficiency than foreign advanced level 2% -5%, the efficiency of the motor system than the advanced level of 10% -20%. Therefore, China has made great demands in improving the efficiency of the electrical system and strengthening the system energy management. High efficiency motor refers to the effective output power and input power is relatively high motor, mainly for high efficiency motor. The motor also consumes part of the energy itself when converting electrical energy into mechanical energy, including winding losses, core losses, wind wear and load spurious losses. Compared with conventional motors, efficient motors have higher energy conversion efficiency and lower energy loss in energy conversion processes that convert electrical energy into mechanical energy.
(NEMA standard), the efficiency of the motor is 2% -6% higher than that of the standard motor, the efficiency of the ultra-efficient motor is higher than that of the "NEMA standard" motor 0.8%, and the efficiency of the motor is higher than that of the "NEMA standard" motor according to the standard of the National Electrical Manufacturers Association (NEMA) -4%. Efficient motor to achieve "efficient" nature is to reduce the internal energy loss of the motor, the total cost of efficient motor than ordinary motor 20% -30% lower efficiency 2% -7%. The promotion of high efficiency motor is beneficial to reduce the motor loss and improve the motor efficiency. Increasing the efficiency of the motor is a very important part of the energy saving of the motor system. China's current widely used Y series motor efficiency average of 87.3%, while the average efficiency of the US high-performance motor 90.3%, in recent years, the introduction of ultra-efficient motor products, the average efficiency of up to 91.7%. Clearly, the potential for energy conservation is enhanced by improving motor efficiency. At present, China's total installed capacity of electric motors has reached more than 400 million kW, the annual power consumption of 1.2 trillion kWh, accounting for 60% of the total electricity consumption, accounting for 80% of industrial electricity consumption, including fans, pumps, The total capacity of more than 200 million kW, the annual power consumption of 800 billion kWh, accounting for about 40% of the total electricity consumption, so the energy requirements on the motor greatly, but also the best energy-saving effect of the place. The use of new motor design, new technology and new materials, by reducing the electromagnetic energy, thermal energy, mechanical energy loss to improve output efficiency, energy efficient motor than the traditional motor efficiency of about 3% -5%, the current level of energy efficiency indicators to reach two Less than 10%, the development of a wide space.
1, the motor power density, efficiency, life and other comprehensive performance needs to be further improved.
2, product consistency, reliability and the use of the automotive industry there is still a gap; many enterprises produced by the sample quality is good, but a mass production will appear in different quality, can not achieve the same performance. And the product through the meet the vehicle quality requirements TS16949 quality system standard certification is still less.
3, the cost is too high. This is mainly in addition to requiring companies to improve the technical level, but also must improve productivity. Only to a certain amount of production, the motor cost of the price can be a real decline.
And the new energy vehicle motor, electric control system is relatively complex conditions: the need to frequent start and stop, acceleration and deceleration, low speed / climbing requirements of high torque, high speed requires low torque, with a large variable speed range; The car also needs to handle special functions such as motor start, motor power generation, brake energy feedback and so on.
In addition, the energy consumption of the motor directly determines the battery life in the case of fixed battery mileage. Therefore, the electric vehicle drive system in the load requirements, technical performance and work environment have special requirements: First, drive the motor to have a higher energy density, to achieve lightweight, low cost, to adapt to limited interior space, at the same time to have Energy feedback capacity, reduce vehicle energy consumption; Second, the drive motor at the same time with high-speed wide speed and low speed and high torque to provide high starting speed, climbing performance and high-speed acceleration performance; Third, the electronic control system to have high control Accuracy, high dynamic response rate, while providing high safety and reliability.