Explosion-proof permanent-magnet brushless DC motor

Abstract

The present invention relates to an explosion-proof permanent-magnet brushless DC motor and comprises a motor body and a motor controller. The motor body is a permanent-magnet brushless DC motor; a permanent-magnet rotor alnico and a stator winding are arranged in the motor body; the stator winding overhang is provided with a position transducer of rotor alnico; the position transducer of rotor alnico is connected with the motor controller; an explosion-proof shell is arranged outside the motor body and the motor controller to form an integrative explosion-proof structure for the motor body and the motor controller. The brushless DC motor overcomes the problems of switching spark, electromagnetic interference, poor reliability, and so on, which are caused by the dependence on mechanical electrical brush in the prior art, and has the advantages of no switching spark, no electromagnetic interference, no rotor loss, security, excellent explosion-proof performance, high reliability, long service life, maintenance-free performance, high efficiency, energy-saving performance, and excellent high-velocity performance. Moreover, the brushless DC motor can operate for thousands of rounds, and has a regulating range of 1 to 100 and excellent sealing performance. The brushless DC motor also has the advantage of working in the environments of high vacuum, corrosive gas, liquid medium, and so on.

Description

technical field [0001] The present invention relates to an explosion-proof electric motor, specifically an explosion-proof brushless DC electric motor that provides power for engineering machinery or combat equipment used in gas stations, chemical industry, airports, pyrotechnics, battlefields and other explosive gas environments except coal mines. electric motor. Background technique [0002] As a kind of power equipment used in explosive gas environment, explosion-proof DC motor is widely used in the control of equipment with high control precision, good dynamic characteristics and large starting torque due to its linear mechanical characteristics and speed regulation characteristics. , Drive. The explosion-proof DC motor of the prior art adopts a brushed DC motor, which has the following disadvantages: 1. It must rely on mechanical brushes for commutation, which brings problems such as commutation sparks, electromagnetic interference, and poor reliability, which seriousl...

AI Technical Summary

Problems solved by technology

The explosion-proof DC motor of the prior art adopts a brushed DC motor, which has the following disadvantages: 1. It must rely on mechanical brushes for commutation, which brings problems such as commutation sparks, electromagnetic interference, and poor reliability, which seriously affects Second, because it is an explosion-proof structure, the maintenance work involves the safety of explosion-proof performance, which requires very strict and cumbersome working procedures; Third, due to the existence of commutation sparks, its speed regulation characteristics It is very limited, it cannot run at high speed (usually below 10,000 rpm), and the speed regulation range is small (usually only 1:10); 4. The rotor magnetic field is generated by coil energization, and there is serious rotor loss and heat generation problems, greatly reducing the output power and efficiency, and also affecting its service life

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