1. The starting current is small. The high frequency machine only needs 0.2~0.3 times of rated current to generate 1.5~2 times of rated starting torque. Whether it is brush or brushless DC motor, it needs 1.5~2 times of rated current to get 1.5~2 times of rated starting torque. In other words, if the motor of the same power to achieve the same starting torque, the starting current of the DC motor will be 5 to 10 times that of the high frequency machine.
2. It runs efficiently. The high frequency machine can guarantee high efficiency in the speed range of 1:50 and the torque variation range of 1:5; while the DC motor can only guarantee high efficiency under high speed and light load, and the high efficiency area is narrow. For variable speed and variable torque conditions such as electric bicycles, the average efficiency of high frequency motors will be 15 to 30% higher than that of brushed and brushless DC motors.
3. The system is safe and reliable and has a long life. The high frequency machine has neither a fragile commutator mechanical structure nor a permanent magnet with unstable performance. Whether it is life or operational stability, high frequency motors are much higher than brushed and brushless DC motors. The high frequency machine has four-quadrant operational symmetry, enabling energy regenerative braking of electric bicycles without adding any hardware. This not only increases the driving safety of the electric bicycle, but also increases the utilization efficiency of the battery.
4. It has a strong overload capability. Since the working magnetic field of a high frequency machine is different from that of a brushless and brushless DC motor, it does not exhibit alternating heat, so the heat is small, so-called "cold rotor". In addition, there is no permanent magnet with poor thermal performance. Therefore, the high frequency machine has an unparalleled overload capability of brushed and brushless DC motors. In a short time, the high frequency machine is allowed to overload 2~3 times, making its performance close to that of gasoline engine. This is one of the main reasons why high frequency machines are used in electric vehicles in Europe and the United States.
5. The system is cost effective. The high frequency machine system is a mechatronic product, and its control performance is mainly realized by computer software. Therefore, the price of its controller is only about 30% higher than that of the brushless DC motor controller. The high frequency machine eliminates the expensive rare earth permanent magnet, and the manufacturing process is simpler than the brushless DC motor. The price of high frequency machine should be about 15% lower than the price of brushless motors. Therefore, the price of the high frequency machine system should be comparable to the price of the brushless DC hub motor system, that is, the high frequency machine system has a high cost performance.
Liaoning Yufei High Frequency Equipment Co., Ltd.
produces high frequency machine for sale
. If necessary, welcome to buy!