Alternating current/direct current tachogenerator

Abstract

An alternating current/direct current tachogenerator is disclosed. The tachogenerator comprises an engine base, an external flux-insulation sleeve, an external stator, permanent magnetic steels, a hollow cup-shaped rotor, an internal stator, an internal flux-insulation sleeve, hall elements, a rotating shaft, a left end cover and a bearing, and a right end cover and a bearing, wherein the external flux-insulation sleeve is fixed on the inner side of the engine base; the external stator is fixed on the inner side of the external flux-insulation sleeve; the permanent magnetic steels are embedded in clamping grooves among the parts of the external stator; the internal flux-insulation sleeve and the right end cover are fixed; the internal stator is fixed on the outer side of the internal flux-insulation sleeve; the hall elements are embedded in the clamping grooves among the parts of the internal stator; one end of the rotating shaft passes through the left end cover bearing while the other end of the rotating shaft passes through the cup bottom of the cup-shaped rotor, the central through hole of the internal flux-insulation sleeve and the right end cover bearing; and the cup wall of the cup-shaped rotor is positioned an gap between the internal stator and the external stator. The alternating current/direct current tachogenerator provided by the invention can convert the rotating speed into the corresponding alternating current or direct current electric signal to output according to needs, is free of a reversing device, a winding, a toothed slot and residual voltage, and capable of accurately measuring the rotating speed at a low speed.

Description

technical field [0001] The invention relates to a tachogenerator, more specifically to an AC / DC dual-purpose tachogenerator. Background technique [0002] The tachogenerator is a tiny electrical device that measures the speed. Its function is to convert the input mechanical speed into a voltage signal output, and make the output voltage signal proportional to the speed. Tachometer generators are mainly divided into two categories: DC tachometer generators and AC asynchronous tachometer generators: when the DC tachometer generator is running under load, the output voltage and the speed cannot maintain a strict proportional relationship, and there are errors, mainly due to the armature reaction The demagnetization effect of the brush, the non-linearity of the contact resistance of the brush, and the influence of temperature. In addition, due to the existence of the iron core cogging, a certain tooth harmonic electromotive force will be generated; when the AC asynchronous tacho...

AI Technical Summary

Problems solved by technology

Tachometer generators are mainly divided into two categories: DC tachometer generators and AC asynchronous tachometer generators: when the DC tachometer generator is running under load, the output voltage and the speed cannot maintain a strict proportional relationship, and there are errors, mainly due to the armature reaction The demagnetization effect of the brush, the non-linearity of the contact resistance of the brush, and the influence of temperature. In addition, due to the

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