SU1534665A1 - Arc-stator induction motor - Google Patents

Abstract

The invention relates to electrical engineering and can be used in devices of rotational motion. The purpose of the invention is to reduce the acceleration time. The device contains a rotor on the drum 6 and two arc stator 1, located diametrically against each other. The rotor contains two halves 3 and 4 of the magnetic cores with pauses. In the slots of the half 3 is placed short-circuited winding. In the second half of the 4th massive magnetic circuit there are longitudinal grooves. The mechanical characteristic is driven by the first half of the 3 rotor magnetic cores, and for the second half of the 4th magnetic cores of the rotor, the mechanical characteristic is soft with a maximum torque at the start. A total mechanical characteristic with a large starting torque provides short starting properties of the engine and reduces the acceleration time of the rotor to a steady-state speed. 2 Il.

Description

The invention relates to electrical engineering, in particular, can be used in electric arc motors of various rotary motion drives.

The purpose of the invention is to reduce the acceleration time of the rotor.

Figure 1 shows the structure of an electric motor; figure 2 - the mechanical characteristics of the motor.

The arc-induction asynchronous electric motor contains two identical stator 1 with windings 2, located symmetrically and diametrically opposite to each other, the rotor magnetic circuit consisting of two halves 3 and 4. which laid short-circuited winding 5 of the rotor. The second half 4 of the rotor magnetowire is a massive steel strip with grooves. Both half 3 and 4 of the rotor magnetic core mounted on the surface of the drum 6.

The motor works as follows.

When the windings 2 are connected to the three-phase voltage source, they create a traveling magnetic field, which, interacting with the windings on the rotor, creates a torque that rotates the drum 6.

The active interaction zone of the stator with the rotor is determined by the total length of the stators 1 a 2 21 &. At any position of the rotor, half of the active zone overlaps the first half of the 3 rotor magnetic cores, and the other half of the active zone - the second half of the 4 rotor magnetic conductors.

The winding 5 of the first half 3 of the rotor core provides a rigid mechanical characteristic 7 (figure 2). The second half of the 4 magnetic rotor in the form of a massive

A steel strip with grooves provides a soft characteristic 8 (FIG. 2) with a large starting torque. The presence of longitudinal grooves on the surface of a massive steel rotor allows

change the equivalent electrical resistance of the rotor for half of the 4 magnetic circuit. The dimensions of the grooves of the half 4 of the rotor magnetic circuit are chosen so that the equivalent

the rotor resistance provided a critical slip close to

SK 0.

In general, the total mechanical performance of 9 electric motors

is determined by the sum of characteristics 7 and 8 (FIG. 2). As can be seen from figure 2, the total mechanical characteristic has sufficient rigidity, and the starting torque is close to

maximum. This allows for good starting properties and reduces the acceleration time of the rotor of the electric motor to a steady speed of about (5-10)%.

Claims (1)

Invention Formula Arc-induction asynchronous electric motor, containing two arc stator, located symmetrically and diametrically opposite to each other, and the rotor magnetic circuit with short-circuited winding laid into the grooves, By the fact that, in order to reduce the acceleration time of the rotor, the rotor magnetic core is made of two halves, with one half of the magnetic core containing a short-circuited winding in grooves, and the second half is made solid steel with longitudinal grooves. n, of / ftott ABOUT FIG. g