Braking device

Abstract

The invention discloses a braking device, which mainly comprises a flywheel rotatably arranged on a support seat, a ring-shaped rotor arranged at one side of the flywheel, and a stator fixed on the support seat and connected to the support seat. The rotors are sleeved with each other, and the stator includes a plurality of first and second magnetic poles, wherein each of the first magnetic poles is larger than each of the second magnetic poles, and the first and second magnetic poles surround each other and are staggered with each other. The magnetic poles are all wound with a coil, and a magnetic control unit is installed on the side of the support seat near the edge of the flywheel, which can be subjected to the current generated by the coils to form a magnetic force, so that the rotating load of the flywheel changes. Therefore, when the rotor rotates, the braking device of the present invention can reduce the cogging torque by staggering the large and small magnetic poles, thereby reducing the noise.

Description

technical field [0001] The invention relates to a braking device, in particular to a braking device capable of reducing cogging torque and noise. Background technique [0002] For the braking device, noise and cogging torque are generated because when the positions of the permanent magnets of the rotor and the slots of the stator change, the air gap reluctance changes with the position, and the magnetic flux and magnetic production energy in the magnetic circuit change accordingly. , and then generate vibration and noise, which have a significant impact on the efficiency of the braking device. [0003] The commonly used braking device mainly includes a flywheel, a circular rotor, which is arranged on one side of the flywheel, and a stator arranged inside the central hole of the rotor. The stator has an iron core, and the outer side of the iron core has multiple Outwardly extending teeth, and coils are wound on each tooth, such as figure 1 As shown in , it shows the periodi...

AI Technical Summary

Problems solved by technology

[0003] The commonly used braking device mainly includes a flywheel, a circular rotor, which is arranged on one side of the flywheel, and a stator arranged inside the central hole of the rotor. The stator has an iron core, and the outer side of the iron core has multiple Outwardly extending teeth, and coils are wound on each tooth, such as figure 1 As shown in , it shows the periodic variation of the cogging torque waveform of the commonly used braking device. It can be clearly seen that the average value of the cogging torque is about 86.8mN-m. In other words, the braking device with this structure is in the Apparently high cogging torque when turning, and thus disturbing noise

[0004] In order to eliminate the above-mentioned shortcoming of cogging torque, the rotor of the braking device is made of multiple permanent magnet blocks, and multiple magnetic poles are provided, while the stator is stacked with multiple circular silicon steel sheets at a specific oblique angle It is made of fastening, and its outer circumference has a number of helical tooth slots for winding wiring, and a deflection magnetic field is generated through the rotor and the stator to eliminate the cogging torque caused by the braking device during operation. vibration and noise; however, the production of this structure is more complicated, and its cost will also increase relatively

Images