Dual-rotor permanent-magnet DC servo speed measurement machine unit

Abstract

A dual-rotor permanent-magnet DC servo speed measurement machine unit comprises a rotation shaft, an electric brush, a support, a commutator, an insulation sleeve, a slotless rotor, an external stator core, permanent-magnet magnetic steel, a cup-shaped rotor, an internal stator core, a Hall component, a copper sleeve, an enclosure, a front end cover, a rear end cover and bearings, wherein the rotation shaft sequentially passes through the front end cover bearing, the insulation sleeve, the slotless rotor, the cup-shaped rotor, a copper sleeve central hole and the rear end cover bearing and are fixed with the enclosure respectively by the front end cover and the rear end cover, a winding of the slotless rotor is connected with the electric brush by the commutator, the commutator is fixed on the rotation shaft by the insulation sleeve, the Hall component is fixed in the internal stator core, the permanent-magnet steel is fixed in the external stator core, and a cup body of the cup-shaped rotor is arranged in a gap between the internal stator core and the external stator core. In the dual-rotor permanent-magnet DC servo speed measurement machine unit disclosed by the invention, an electric motor and a speed measurement device share the same magnetic field and the rotation shaft, the dual-rotor permanent-magnet DC servo speed measurement machine unit is compact in structure, small in size and stable in running, moreover, a signal of the speed measurement device is output in a brushless manner, the linear error is low, and no low-speed failure region is generated.

Description

technical field [0001] The invention relates to a DC servo speed measuring unit, more specifically to a double-rotor permanent magnet DC servo speed measuring unit. Background technique [0002] The servo motor, also known as the executive motor, is used as an actuator in the automatic control system to convert the input voltage signal into the angular displacement or angular velocity output of the rotating shaft. Servo motors can be divided into DC servo motors and AC servo motors according to the nature of the power supply. Among them, the instantaneous rotational angular velocity information is an important parameter of the servo motor. Through the measurement of the rotational angular velocity, the monitoring of the operating state of the servo motor can be realized, and the servo motor can be controlled according to the production requirements. [0003] At present, DC servo tachometer units are often used. The manufacturing process is generally that the servo motor and...

AI Technical Summary

Problems solved by technology

[0003] At present, DC servo tachometer units are often used. The manufacturing process is generally that the servo motor and the tachometer share the same shaft, but the stator and rotor windings (or the cup body of the cup-shaped rotor) are of two-stage structure. Therefore, the overall shape of the tachometer unit Most of them are slender and large in size, and the manufacturing cost of the unit is also high

In addition, for the DC servo tachometer unit, the tachometer generator used is a DC tachometer generator, and its armature circuit includes brushes and commutator segments, which will generate corresponding contact resistance, resulting in linearity errors and low speed in the output characteristics of the tachometer generator. failure zone

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