Asynchronous motor

Abstract

The invention belongs to the technical field of motors, and particularly relates to an asynchronous motor which comprises a motor body, an acceleration box and a variable-speed shaft. The accelerationbox is arranged at the right side of the motor body; a driving shaft is rotatably connected between the left side wall and the right side wall of the acceleration box and close to the rear end face of the acceleration box, and the left side face of the driving shaft is fixedly connected with an output shaft of the motor body; the same variable-speed shaft is rotatably connected between the left side wall and the right side wall of the acceleration box and close to the front end surface of the acceleration box. The starting torque resistance of the motor body is effectively reduced, step-by-step acceleration of load equipment is achieved by sequentially switching meshing connection between a first transmission disc and a second transmission disc with different transmission ratios, the starting load is reduced, the capacity increasing requirement is met, the equipment cost of a transformer is increased, and due to the fact that during later normal operation, a stable meshing connectionmode is adopted, and electric energy loss is avoided.

Description

technical field [0001] The invention belongs to the technical field of motors, in particular to an asynchronous motor. Background technique [0002] Asynchronous motor, also known as induction motor, is an AC motor that generates electromagnetic torque through the interaction of the air gap rotating magnetic field and the induced current of the rotor winding, thereby realizing the conversion of electromechanical energy into mechanical energy. [0003] Three-phase asynchronous motors are mainly used as motors to drive various production machinery, such as: fans, pumps, compressors, machine tools, light industry and mining machinery, threshers and pulverizers in agricultural production, processing machinery in agricultural and sideline products, etc. Wait. Simple structure, easy manufacture, low price, reliable operation, durable, high operating efficiency and applicable working characteristics. [0004] According to an asynchronous motor in CN107659095A, the invention can w...

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Problems solved by technology

[0007] In order to make up for the deficiencies of the existing technology and solve the shortcomings of the asynchronous motor in the prior art, the starting torque is not large, and it is difficult to meet the needs of starting with load. Most of the solutions to this problem in the current society are to increase the power capacity of the motor (i.e. capacity increase) to increase its starting torque, which causes a serious "big horse-drawn trolley", which not only increases the investment in purchasing equipment, but also wastes a lot of electricity due to low-load operation in long-term applications, which is very uneconomical. The second method is to purchase additional hydraulic couplings. First, let the motor start without load, and then drive the load by the hydraulic coupling. This method also increases the investment in additional equipment, and because the efficiency of the hydraulic coupling is lower than 97 %, so at least 3% of the electric energy is wasted, so the efficiency of the entire driving device is very low, and it also wastes electricity. When it is used to drive loads that often have short-term overloads, such as crushers used in mines, it often stops and burns out. The motor can only operate under light load conditions, which not only reduces the output but also wastes electric energy. At the same time, the starting current of the motor is very large, which increases the capacity of the required power supply transformer, thereby increasing a large amount of investment. Another way is to use step-down To reduce the starting current by starting, it is also necessary to increase the investment of additional voltage-reducing devices, etc. The present invention proposes an asynchronous motor

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