SU371601A1 - SSSRE. P. Abramtsev and V. A. Sviridov - Google Patents

Description

one

The invention relates to the field of measurement technology and can be used to measure the speed and angles of rotation of objects.

Devices for measuring speed and angles of rotation are known, comprising a stator made in the form of a differential transformer, as well as a ferromagnetic rotor with two rows of teeth displaced relative to each other by a half tooth pitch.

However, in such devices, an increase in the number of pulses per revolution of the rotor and an increase in the ratio of the maximum output signal to the minimum is achieved by mixing one row of teeth relative to another. Such a rotor design requires marking and cutting each tooth separately, which leads to an increase in the systematic error of the device.

In the proposed device, the rotor is made in the form of a covering hollow dilar with two rows of an odd number of teeth located along the edges of the inner surface of the rotor in alignment with each other. The stator contains a L-shaped magnetic core, the side rods of which are located near the rotor teeth, and the middle ones are provided with pole pieces having the form of ring sections.

This makes it possible to increase the measurement accuracy as well as the output power of the device.

FIG. 1 shows schematically the general appearance of the device being supplied; in fig. 2 - view along arrow A.

The device contains a rotor 1 with two rows of teeth 2 and 5 in the form of a differential transformer, including magneto wire 4, pole pieces 5 and 6, the primary

winding with se (Ccsi 7 and 7, two secondary windings € sections 8, 8 and 9, 9.

The rotor / is made in the form of a gear with two rows of teeth 2 and 5, separated by an annular groove. Almost the entire length of this

the grooves are placed pole pieces 5 and 5. The presence of pole pieces increases the area of the air gap between the magnetic core and the rotor. This increases the output power of the device.

On the middle rods of the magnetic core 4, sections 7 and 7 of the primary winding are connected in parallel. On the side rods of the magnetic circuit there are placed secondary windings connected in parallel, sections 8, 8 and 9, 9 of which, respectively, are connected to each other. For sections 5, 5 and 8, 9, the points o and b are common and the output voltage E-2 is removed from them.

The rotor is mechanically connected to the shaft being monitored. When a voltage of 1 alternating current is applied to the primary winding, sections of this winding 7 and T create in the magnetic circuit equal in size and according to directed flows, which are then divided into parallel partial flows. The latter induce a differential emf at the converter output. EC, according to which a control value is judged.

Subject invention

A device for measuring speed and angles of rotation, containing a ferromagnetic gear rotor and a stator, is a differential transformer, characterized in that, in order to increase the accuracy and output power of the device, the rotor is designed as a female-shaped hollow cylinder with two rows an odd number of teeth located along the edges of the inner surface of the rotor in alignment with each other, and the stator contains an Ж-shaped magnetic circuit, the side rods of which are located near the teeth of the rotor, and the middle ones are equipped with lyusnsh: and naK01n; echn "1kami, .yuschi1MI f.tsrmu sections of the ring.