Magnetomotive and high reversal torque direct current motor

Abstract

The invention discloses a magnetomotive and high reversal torque direct current motor, comprising a motor rotor, motor stators, a motor shell, a holder, a speed reducer and a motor output shaft. Two motor stators are fixed on the motor shell, and the circumferential direction of each motor stator is 60 degrees; the holder is fixed on the motor shell; an inner ring magnet and an outer ring magnet are added at the joint part of the rotor and the speed reducer on the basis of not changing the original structure of the motor, the inner ring magnet is a rotor magnet consisting of a plurality of magnets, and the outer ring magnet is a stator magnet with the integrated annular structure; and the stator magnet is connected with the holder, the rotor magnet is fixed on the rotor, the speed reducer is connected with the motor shell and the motor rotor, and the motor output shaft is connected with the speed reducer. However, when the inner ring magnet rotates to a certain angle, the inner ring magnet and the outer ring magnet attract mutually to generate a larger reversal torque, so as to stop the motor quickly when the power supply of the motor is cut off. More pieces of the magnets can achieve better stop and better position holding accuracy when the power supply of the motor is cut off. The motor disclosed by the invention has the characteristics of large bearing capacity when the power supply of the motor is cut off, long service life, adjustable magnet gap and the like.

Description

technical field [0001] The invention relates to a high reverse torque DC motor driven by magnetic power. This type of motor is especially suitable for driving heavy-duty and super-heavy pan-tilts and heavy-duty numerical control machine tool rams. Background technique [0002] Ordinary DC motors have small reverse torque and low load-carrying capacity in case of power failure. It is difficult to realize the rapid stop of the motor and the position maintenance function under high load conditions, such as the motors for pan-tilts that rotate horizontally and at a certain angle for community and road cameras, and CNC motors. The motor used to drive the ball screw of the ram in the machine tool requires the motor to have the characteristics of large load capacity when the power is off, so as to ensure that the pan / tilt or the ram can stop immediately when the power is off, and avoid the free sliding of the pan / tilt or the ram due to inertia , Uncontrolled phenomena occur. Ordin...

AI Technical Summary

Problems solved by technology

[0003] At present, ordinary DC motors are relatively common in the market, and the technology is mature. However, under the condition that the original magnetic cup remains unchanged, it is studied to increase the structure and quantity of stator magnets and rotor magnets near the reducer in the axial direction of the motor to generate magnetic power and high speed. Reverse torque is blank

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