SU1436207A1 - Single-phase induction motor - Google Patents

Description

(21) 4001443 / 24-07

(22) 11/10/83

(46) 11/07/88. Bul. No. 41

(71) Komsomolsk-on-Amur Polytechnic Institute

(72) A.D. Abramov and A. R. Kudelke

(53) 621.313.333 (088.8)

(56) Copyright certificate -SSSR № 158336, cl. H 02 K 17/10, 1963.

Ivanov-Smolensky A.V., Electric Machines.- M: Energie, 1980, p. 450.

(54) SINGLE-PHASE ASYNCHRONOUS MOTOR

(57) The invention relates to electrical engineering, in particular to single-phase

asynchronous electric motor with one

5 4

working winding on the stator without phase-shifting devices. The electric motor includes a housing 1 in which a stator core 2 is pressed with a working winding 3, a rotor with a short-circuited winding 4, a shaft 5, an elongated part of the rotor core 6, two C-shaped stator magnetic cores 7.8, and pole pieces. When a stator winding is connected, a flow arises, the power lines of which are closed through C-shaped magnetic conductors. Due to the mismatch of the axis of the magnetic flux created by the currents of the rotor winding with the axis of the pole pieces, forces arise that create a starting torque. 2 Il.

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ABOUT

The invention relates to electrical engineering, in particular to single-phase asynchronous electric motors with one working winding on a stator without phase shifting devices.

The purpose of the invention is to increase the starting torque and simplify the design of a single-phase asynchronous motor without phase-shifting devices.

Figure 1 shows a single-phase asynchronous electric motor, a longitudinal section; figure 2 - the same, sings a river section.

A single-phase asynchronous electric motor comprises a housing 1 into which a stator core of 2 s is pressed. a working winding 3, a rotor with a short-circuited winding 4, a shaft 5, an elongated part of the rotor core 6, two C-shaped magnetic cores 7 and 8 (stator) fixed in the stato case; ra, pole pieces 9.

The motor works as follows.

When the working stator of the motor is connected to a single-phase network, a pulsating magnetic field is created in the air gap of the engine, which causes a flow of currents in the short-circuited winding of the rotor. As a result of the interaction of the currents of the rotor winding and the stator magnetic field, moments are formed which compensate each other and the resulting torque is zero.

In the presence of C-shaped magnetowires on the stator, covering the elongated part of the rotor, it is obvious

their poles are offset from each other by 90 el. hail, a magnetic flux arises from the flow in the rotor winding, the magnetic power lines of which are closed through C-shaped magnetic circuits.

When the axis of the magnetic flux created by the currents of the rotor winding and the axis of the pole tips of the C-shaped stator magnetic circuits are incompatible, forces acting on the rotor arise, which create an additional starting torque.

The further process of starting the engine occurs when the rotor currents interact with the magnetic flux generated by the stator's working winding. Thus, the implementation of C-shaped magnetic cores allows to increase the starting torque and simplify the design by eliminating one stator winding,.

Claims (1)

Invention Formula A single-phase asynchronous motor containing a single-phase winding mounted on the stator and a short-circuited rotor, which is characterized by the fact that, in order to increase the starting torque and simplify the design, the rotor is made elongated, the C-shaped motor mounted on the stator magnetic wires with. pole tips that cover the elongated part of the rotor, and the angle between the axes of two adjacent poles of the tips is 90 el. hail. .2 IV