SU493868A1 - Linear Contactless AC Motor - Google Patents

Description

one

The invention relates to electromechanics and to be used in railway and industrial transport.

A contactless linear motor is known, having a pole system located along a path, made of ferromagnetic bars laid perpendicular to the direction of movement and connected alternately with one and the other rails, and a stator system with transformer type position sensors located on a moving carriage.

The purpose of the invention is to increase reliability and improve machine utilization. For this purpose, the position sensors are made in the form of laying, their alternating current coils of the magnetic cores mounted on the carriage, and the poles interacting with these magnetic cores, located along the path and made in the form of a profiled channel.

FIG. 1 presents a cross section of the proposed engine; in fig. 2 is a top view of the pole system.

The motor has an excitation winding I fixed on the magnetic core 2, which in this case is the axis of the wheel set and the wheel 3 of the moving carriage. A trolley 4 with a winding 5 is also fastened on the trolley. Poles of the deployed rotor 7 and 7, made in the form of ferromagnetic bars, are installed perpendicular to the direction of movement between the rails 6 and along the path. A profiled channel 8 is located along the path. At the same time, the magnetic core of the inductor pole position sensor with an AC control coil 9 (low controllable power) and a semiconductor switch 10 are fixed.

The engine works as follows.

The workflow, which occurs when the excitation winding 1 is connected to a power source, interacts with the currents flowing in the winding wires 5. This creates

the tractive force, the sign and magnitude of which are determined by both the sign and magnitude of the current of the excitation coil and the magnitude of the current depending on the voltage on the control coil 9 and the characteristics of the switch 10,

as well as on the relative position of the system powered by alternating current relative to the system powered by direct current (the effect of brush shear).

In this case, it is possible to control or stop the trolley, both by shifting the AC wiring system with respect to the DC wiring system on the trolley, and shifting the channel channel with respect to the DC pole system by

of the way.

The use of a fixed channel 8 with protrusions also allows, using some kind of auxiliary measuring coil on the trolley, to receive accurate information on the distance traveled by means of the pulse counter, and using the frequency meter to obtain information on the current speed of the trolley.

Subject invention

Claims (2)

1. Linear contactless AC motor with fixed poles of the inductor and mounted on a moving carriage of the core system with a winding connected through a semiconductor switch. controlled by inductor position sensors, distinguished by the fact that, in order to increase reliability, improve engine utilization, said sensors are made in the form of laying; their AC coils are magnetic conductors mounted on a trolley and interacting with these magnetic conductors poles along the way and executed in the form of the profiled channel. 2. An engine according to claim 1, characterized in that, in order to increase the reliability of controlling the speed and direction of motion, a part of the elements of said channel is installed with the possibility of their displacement relative to the poles of the inductor.   H f 1 SHIMMMDSHMZh L