Integrated hub motor

Abstract

An integrated hub motor and a control method thereof. The motor includes a motor shaft (4) and a stator (12) fixed on it. A rotor housing (10) is provided around the stator (12). The front and back sides of the rotor housing (10) are rotatablely mounted on the motor shaft (4) by rotor end caps (8, 14) and bearings (6, 19). The two ends of the motor shaft (4) are extended out of the rotor end caps (8, 14) to form a short end and a long end. A bearing cap (1) is mounted on the outside of the rotor end cap (8) and covers the short end of the motor shaft (4). A bearing cap shaft (26) is provided on the center of the bearing cap (1) and projected out of the center of the bearing cap (1). The bearing cap shaft (26) is projected toward the direction of the motor shaft (4). Position detection devices (3) are provided on the corresponding positions of the end of the motor shaft (4) and the bearing cap shaft (26). A servo controller (11) is mounted around the motor shaft (4). The position detection devices (3) detect the rotation of the bearing cap shaft (26) and then transmit a detected signal to the servo controller (11). A rotation angle or position of the rotor is obtained through the process of the servo controller (11) so as to accurately control the motor. The motor has advantages of simple structure, energy-saving,excellent starting characteristic, small size and high efficiency.

Description

technical field [0001] The invention relates to an integrated hub motor, in particular to a permanent magnet synchronous hub motor using a position detection device. Background technique [0002] With the development of the economy and the improvement of people's living standards, electric vehicles such as electric mopeds, electric bicycles, electric motorcycles, small electric cars, electric cars, and electric buses are gradually emerging in urban traffic. As a new generation of electric vehicles, electric wheel vehicles need to improve the hub motor, a key component, in order to improve performance and reduce costs. [0003] The operating characteristic of the drive motor for vehicles is that the motor is powered by the battery, and strives to enable the limited energy to travel the longest mileage, which is closely related to the performance of the drive motor. Therefore, the starting torque of the motor, the overload capacity of the motor, the operating efficiency of th...

AI Technical Summary

Problems solved by technology

However, the magnetoelectric position detection device has the following disadvantages in physical structure: the inner side of the stator is generally arc-shaped and smooth, the sensor is not easy to install and fix, and it is easy to cause positioning errors, which in turn causes the phase deviation of the signal, making the high-order harmonics in the signal The weight is large; the processing and manufacturing process is complicated, which is not conducive to industrialization; the reliability is low, and the sensors are evenly distributed on the inner wall. Cracking increases the difficulty of processing and affects the life of the product; the magnetic field induced by the sensor leaks a lot, and the magnetic field cannot be fully applied, resulting in large noise in the signal and affecting the measurement accuracy; the small size of the sensor is required, which makes the product cost relatively high

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