SU1359864A1 - Synchronous line electric motor - Google Patents

Abstract

The invention relates to electrical engineering, in particular to linear electrical machines. The goal is to increase the power density. The device consists of a rotor 1 mounted on the track structure 5. The casing 4 of the movable part is attached to the bearing supports in which the rotor shaft 1 is located. At the pole of the movable part of the inductor an excitation winding 3 is supplied, which is supplied from a direct current source. The track structure 5 and the casing 4 of the moving part are separated by an air gap. Two additional poles 5, the length of which is equal to the length of the active part of the rotor 1, are provided to the casing 4 of the movable part by non-magnetic rods 7, which reduce the scattering of the magnetic flux. 2 hp f-ly, 2 ill. with CO with with SP (; o 00 about: 4; fie.1

Description

The invention relates to electric machines and can be used in an electric drive.

The purpose of the invention is to increase the power density of an electric motor.

Fig. 1 shows the construction of a synchronous linear electric motor; Fig. 2 shows a scheme for obtaining an electromagnetic traction amplifier between the LIA and the point of contact of the rotor with the track structure.

The motor consists of a movable part with a rotor 1 equipped with a multiphase winding, a pole 2 with an IP winding 3 excitation, a ferromagnetic casing 4, a track structure 5, with the pole 2 and the ferromagnetic casing 4 forming a magnetic section of the movable part of the device. In addition, the device can be equipped with additional poles 6, mounted on non-magnetic rods x 7, the length of the poles is equal to the length of the rotor 1, The incident and escaping edges of the casing 4 of the movable 25 part can be made rounded,

The motor works as follows.

Compared with the prototype, the motor propelled develops a painful torque due to the effect

When applying the g-phase voltage to the magnetic flux organization.

40

the rotor winding 1, made with the number of pairs of poles, a system of currents shifted in space by an angle

; 2I

creates a running magnetic

m.5

a field that rotates at a speed

n, the resistance of the rotor 1 magR

the minimum flow at that moment when the vector F of the magnetic flux of the rotor 1 is directed along the Y axis, t, e, is directed to the point K of the contact of the rotor 1 with the track structure 5. If the rotation of the magnetic field vector with synchronous speed occurs clockwise, then the passage of the vector F through the point K creates a rotating electromagnetic moment relative to the point of contact K, due to attraction to the track structure 50

round 5 ,.

The necessary condition for the rotation of the electromagnetic moment relative to the point K is

Making the incident and descending edges of the movable part of the curved reduces the pointing of the vortex. currents during the movement of the movable inductor 25 over the ferromagnetic core and improves the energy characteristics of the electric motor,

The additional poles reduce the air gap between the bark and the magnetic guide and both provide an increase in coefficient and decrease in losses.

Claims (1)

Formula inventions 1, a synchronous linear electric motor containing a movable part with a rotor and windings, is wrung on a track structure, in the form of a ferromagnetic core, characterized in that, in order to increase the power, the movable part of the field winding a magnetic circuit, made in the casing, covering the rotor and about 45 the inequality of inductive resistances 55 additionally from the side of the track structure, and the magnetic flux along the longitudinal and pole is fixed on the inner surface of the transverse axis (X. 7 / X), which has the upper part of the casing, place at the polar pole execution, 2 1, the rotor 1 tends to occupy a position that is distinguished by the fact that flow, t, e, will begin to overlap. After wedging in. synchronism rolling of the rotor 1 along the track structure 5 occurs, with angular velocity and /.- 2P, where f is the frequency of the supply voltage. Linear speed of the motor V ID. R, where R is the rotor radius In the direction of rotation of the magnetic field clockwise, the rotor 1 rotates around an axis counterclockwise, performing a rotational-translational motion along the track structure 5, The shoulder of the electromagnetic moment relative to the point K depends on the angle of the load: rk R sinS, where 0 is the angle of the load. The rotor magnetic field vector with a constant engine load (, 1ccciist) has a constant direction and moves with a linear velocity V SD-EL, where the rotation speed of the magnetic field is angular, Compared to the prototype, the proposed engine develops more torque due to the effective organization of magnetic flux. 0 0 The execution of the incident and running edges of the movable part of the rounded reduces the guidance of the vortex. currents during the movement of the movable part 5 of the inductor over the ferromagnetic guide and improves the energy characteristics of the electric motor, Additional poles reduce the air gap between the core and the ferromagnetic guide and provide an increase in power factor and a reduction in losses. Invention Formula 1, a synchronous linear electric motor containing a movable part with a rotor and windings, is supported on a track structure made in the form of a ferromagnetic guide, characterized in that, in order to increase the specific power, the movable part is provided with an excitation winding, pole and magnetic circuit, made in the form of a casing covering the rotor and open5 It is equipped with two additional poles placed on the moving part of the device between the rotor and the track structure. 13598644 3. An electric motor according to claim 1, characterized in that the incident and moving edges of the movable part are rounded. FI.2