SU498694A1 - Single-phase synchronous gear motor - Google Patents

Description

one

The invention relates to electric machines, namely to a gear motor.

Single-phase gear motors are known, comprising a stator with an annular field winding and a magnetic core made in the form of beaks, and a beak-shaped toothed rotor with a permanent magnet.

The disadvantage of these electric motors is the lack of starting torque.

Electric motors are also known with divided poles with a corroded coil mounted on a part of the pole and with a different pole height for leveling the magnetic flux of the main harmonic B with the air gap due to the different length of the air gap.

However, in such electric motors, with developed serration of the stator and rotor, the field harmonic harmonics are distorted, and this leads to a deterioration in the performance of a gear motor operating on the harmonics of the floor, a decrease in its torque, efficiency, a violation of its uniform speed; . The presence of an uneven air gap at certain combinations of the numbers of stator and rotor slots causes an asymmetry of the magnetic flux, driving it to its pulsations when the rotor rotates.

The alternating flow is closed in the axial direction and leads to additional losses and torque pulsations.

The purpose of the invention is to increase the efficiency of an electric motor and ensure a uniform speed of its rotation.

This is achieved by the fact that in the proposed electric motor, the unshielded parts of the pole pieces are installed with a gap in relation to the beaks of the stator magnetic circuit, and a short-circuited damping ring of electrically conductive material is mounted on the rotor coaxially with the axis of rotation.

FIG. 1 depicts the described gear motor, longitudinal section; in fig. 2 - the same cross section.

The electric motor contains a stator 1 with an annular excitation winding 2 and a magnetic core in the form of beaks 3 and 4, at the ends of which pole tips 5 with teeth 6 are installed, divided into parts 7 and 8, and part 8 is shielded by a short-circuited coil 9, and part 7 is installed with

a gap of 10 with respect to the beaks 3 and 4,

placed with a shift one relative

another in space on 90 electric

degrees

The rotor 11 of the electric motor contains two

ferromagnetic disc 12 and 13 with teeth 14

in the form of beaks, between which there is a permanent magnet 15, magnetized in the axial direction. Disks 12 and 13 are deployed one relative to the other by half a tooth division. On the rotor 11, a short-circuited damping ring 16 made of electrically conductive material is mounted coaxially with the axis.

When an electric motor is operating in an air gap, a rotating magnetic field, close to a circular one, is formed by aligning the flow under two parts 7 and 8 pole pieces 5 due to the additional air gap 10 under the unshielded part 7 pole piece 5. This makes it possible to increase the speed. The electric motor and the uniformity of its rotational speed. The presence of a short-circuited damping ring on the rotor allows you to damp the axial pulsating magnetic flux, reduce additional losses in the engine and thereby increase the efficiency and the uniformity of the rotational speed, since the flow in the engine remains almost constant.

Claims (1)

Invention Formula A single-phase synchronous gear motor containing a stator with an annular excitation winding and a magnetic core made in the form of beaks, at the ends of which are installed pole-shaped tips with teeth divided into two parts, one part shielded by a short-circuited coil, a kluvototoe rotor with a permanent magnet, differing the fact that, in order to increase the efficiency of the electric motor and to ensure a uniform speed of its rotation, the unshielded parts of the pole pieces are installed with a gap in relation to the beaks of the magnetic circuit a stator, and a short-circuited damping ring of electrically conductive material is mounted on the rotor coaxially with the axis of rotation. i6 FIG. one P ig.2 ..