Electromagnetic speed-regulating electrical haulage coal cutter

Abstract

The invention is an electromagnetic speed regulating electric-dragged miner, including a machine body, two dragging boxes situated at two ends of the machine body, respectively, driving wheel and a cutting mechanism, where each dragging box contains an electromagnetic speed regulating motor which includes a three-phase asynchronous cage motor, an electromagnetic slip clutch and a speed-regulating control system. The clutch includes an armature, a magnetic pole, exciting winding, magnetic conductor and a speed measurer, the armature is installed on the output shaft of the three-phase asynchronous cage motor and rotates with the output shaft at the same speed, the magnetic pole is installed the output shaft of the electromagnetic speed regulating motor, the exciting winding and magnetic conductor are fixed inside the magnetic pole, and the speed measurer is installed on the output shaft of the electromagnetic speed regulating motor to measure the output speed and feeds it back to the speed regulating control system; the speed regulating control system is a speed and current double closed-loop speed regulating control system, and regulates the corresponding the exciting current magnitude according to the feedback information from the sensor and speed measurer, thus achieving the purpose of changing output speed.

Description

【Technical field】 [0001] The invention relates to an electric traction coal shearer, in particular to an electric traction coal shearer with electromagnetic speed regulation. 【Background technique】 [0002] With the development of high-power comprehensive mechanized coal mining technology and high-yield and high-efficiency mine construction, the requirements for traction and reliability of shearers are also increasing. Due to the complex structure, poor reliability, and difficult maintenance of hydraulic traction shearers, Disadvantages such as difficulty in greatly improving traction, especially the pollution of hydraulic oil have brought great problems to the use of coal, and coal shearers must develop in the direction of electric traction. [0003] At present, there are mainly three types of electric traction shearers developed at home and abroad: direct current traction shearer, alternating current traction shearer and switched reluctance speed regulating electric tracti...

AI Technical Summary

Problems solved by technology

The DC electric traction shearer adopts the DC speed regulating motor electric traction system. The DC speed regulating motor has good traction performance, but the structure of the motor is complex, the cost is high, and it is a carbon brush structure. The carbon brush and commutator are prone to sparks, which makes the commutator easy to wear , deformation, high failure rate, heavy maintenance workload, high maintenance cost, etc.

The AC traction shearer adopts the AC induction motor frequency conversion speed regulation electric traction system, the cost is high, the system is relatively complicated, and cannot be popularized and applied

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