Halbach birotor self-sliding wide range speed regulation permanent magnet hub motor for electric vehicle

Abstract

The invention provides a halbach birotor self-sliding wide range speed regulation permanent magnet hub motor for an electric vehicle. The halbach birotor self-sliding wide range speed regulation permanent magnetism hub motor for an electric vehicle includes barrel-shaped inner and outer rotors, a rotatable stator with inner and outer double layer armature windings, two end caps with special structures, an automatic sliding structure fully utilizing mutual coordination of permanent magnet attractive force and a freewheel clutch, and a double reinforcing structure utilizing an electromagnetic clutch. Besides, the hub motor also utilizes a design of a wireless transmission position sensor signal, a sectional type speed regulation design, Halbach array permanent magnet setting, and a novel heat radiation design, and then becomes a unique motor after being integrated with the other patent: self-sliding motor intelligent cruise and PWM and SVPWM control conversion.

Description

technical field [0001] The invention belongs to the field of new energy electric vehicles, and in particular relates to a Halbach array double-rotor double-augmented automatic sliding wide speed-regulating high-efficiency permanent magnet hub motor for electric vehicles Background technique [0002] At present, people realize that the development of new energy vehicles to improve environmental pollution is the general trend and is imperative. [0003] However, in the prior art, there are many problems in the motors used for driving electric vehicles: 1. The center of the motor is complex, heavy, and the transmission energy consumption is large and the efficiency is difficult to improve; 2. Although there are many patented wheel hubs Motor, but in general, there is still a lot of room for development and improvement in terms of the maximum power, the highest efficiency, the best energy saving, the lowest noise, and the widest speed range within the effective hub space volume;...

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Problems solved by technology

[0003] However, in the prior art, there are many problems in the motors used for driving electric vehicles: 1. The center of the motor is complex, heavy, and the transmission energy consumption is large and the efficiency is difficult to improve; 2. Although there are many patented wheel hubs Motor, but in general, there is still a lot of room for development and improvement in terms of the maximum power, the highest efficiency, the best energy saving, the lowest noise, and the widest speed range within the effective hub space volume; 3. My 200820178396.9 Statorless self-sliding motor patent Due to the difficulty in starting the current position sensorless technology, there are certain difficulties in the manufacturing process of the self-sliding technology; 4. The speed range of the motor is too narrow, of course, the method with built-in magnetic poles can be used , use the relationship between the difference between the quadrature axis Xq and the direct axis Xd to control the magnetic field weakening effect generated by the reluctance torque to increase the speed, but it is difficult to realize the built-in magnetic poles of the double rotor, and the built-in magnetic poles will also increase the weight of the magnetic poles, thereby increasing losses and Bring other related problems; 5. The space volume of the hub is limited, and it is very difficult to increase the power of the motor. One of the problems is that it is difficult to dissipate heat, especially for dual-rotor motors or dual-stator motors. For this reason, many motors use 6. Due to the inherent defects of the permanent magnet itself, the permanent magnet with high remanence density often has a lower working temperature, so when using high remanence density The magnets are limited to increase the output torque, so there is an urgent need for a way to increase the air gap flux density to increase the output torque of the motor; 7. If the motor of the electric vehicle is placed in the hub and directly driven , due to the limited space of the hub, it is difficult to increase the power of the motor. The power of an ordinary motor is proportional to the volume of the motor, and the volume of a low-speed motor with the same power is larger, which causes a contradiction between the space of the hub and the design of the motor power; 8. When using self-sliding technology, the simplest and most effective way is to use an overrunning clutch, but the overrunning clutch is actually a one-way bearing. This kind of bearing cannot reverse the motor, that is, the use of an overrunning clutch cannot make the motor bidirectionally add force and rotate in both directions. This has caused electric vehicles to have only a way forward and no way out; 9. In the current electric vehicle, the workpiece between the motor and the axle of the vehicle is complicated to load and unload and the workpiece is easily damaged; However, at present, there are no effective energy-saving measures for electric motors for electric vehicles, or insufficient attention is paid to energy-saving, or even though they are known, they are stubborn and biased and will not adopt them.

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