Integrated hub motor and control method thereof

Abstract

The invention provides an integrated hub motor and a control method thereof. The integrated hub motor comprises a motor shaft and a stator fixed on the motor shaft, wherein the stator is externally sheathed with a rotor casing; the front end and the rear end of the rotor casing are rotatablely fixed on the motor shaft by a rotor end cover and a bearing; two ends of the motor shaft protrude outside the rotor end cover to form a long end and a short end; a bearing end cover is fixed at the outer side of the rotor end cover; and the short end of the motor shaft is covered therein. The invention is characterized in that a bearing end cover shaft is arranged in the middle part of the bearing end cover in a protruding mode towards the direction of the motor shaft, and a position detection device is arranged at the corresponding position of the end part of the motor shaft and the bearing end cover shaft; the motor shaft is sheathed with a servo controller; and the position detection device senses rotation of the bearing end cover shaft and transmits the sensed signal to the servo controller to finally obtain the rotating angle or position of the rotor after being processed by the servo controller, thus achieving accurate control of the motor. The invention has the advantages of simple structure, energy conservation, good starting characteristic, small volume and high efficiency.

Description

technical field [0001] The invention relates to an integrated hub motor and a control method thereof, in particular to a permanent magnet synchronous hub motor applying a position detection device and a control method thereof. 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 o...

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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