RU20995U1 - PERMANENT MAGNET ELECTRIC MOTOR - Google Patents

Description

Permanent Magnet Motor

The utility model relates to electric machines, in particular to torque motors with limited angular movement of the rotor.

The closest but technical essence is the electric motor 1, which contains two rotors in the form of ring multipolar permanent magnets and a stator with constant current control windings. The stator is made in the form of a ring with grooves in which sections of the control windings are located.

The disadvantages of this design are:

- the presence of large dispersion fluxes outside the working area, which leads to a decrease in magnetic flux in the working area and the creation of spurious magnetic fluxes outside the zone (external interference), i.e. low efficiency and, accordingly, developed moment;

- the implementation of the stator in the form of a ring with grooves limits the working angle of rotation by the magnitude of the inter-slot intervals and introduces additional magnetic tension at the edges of the working angle due to different magnetic conductivity in the working area and in the inter-gap.

The objective of the utility model is to increase the efficiency by reducing the scattering fluxes and increasing the magnetic flux in the working area and increasing the working angle.

An electric motor with permanent magnets, containing two rotors, between which there is a magnetically conductive stator with a control winding made in sections, unlike the prototype, the rotors are made in the form of magnetically conductive stepped rings with permanent magnets located on them and connected to each other, the stator is made in in the form of a smooth ring, while the stator control winding sections are located close to each other.

 1114638

IPC N 02 to 26/00, 33/18

The implementation of the rotors in the form of magnetic conductive step rings with permanent magnets located on them and the closure of the magnetic conductive step rings to each other eliminates the dispersion of the magnetic flux onto the rotor shaft, leads to a concentration of magnetic flux in the working area, eliminates spurious fluxes of scattering, which increases the efficiency and, accordingly, the developed moment.

The execution of the stator in the form of a smooth ring with a control winding, made in the form of sections located close to each other, eliminates the pulsation of the moment at the edges of the working area and increases the working angle of rotation.

The figure shows the design of a permanent magnet motor.

The permanent magnet electric motor contains two rotors, each of which consists of a magnetically conducting stepped ring 1 with permanent magnets 2 located on it and a stator 3 located between the rotors. The magnetically conducting stepped rings 1 of the rotor are connected to each other. Permanent magnets 2 of the rotor with alternating polarity are located on the magnetically conducting stepped ring 1 of the rotor. The rotor magnetic system can have any even number of poles. Poles can be formed both by individual permanent magnets, and on one multipolar permanent magnet, made in the form of a ring. The stator 3 is made in the form of a smooth magnetically conducting ring with a control winding 4 made in the form of sections. The sections of the control winding 4 are located close to each other. The connection of the sections of the control winding, and accordingly the direction of the current in them, is determined from the condition of summing the forces from each section of the winding. The number of sections of the control windings corresponds to the number of magnets.

The device operates as follows. Permanent magnets 2 of the rotors, uniformly and with alternating polarity located on the magnetically conducting stepped rings 1, create a constant in magnitude and alternating in space magnetic flux. When powered by DC

sections of the stator control winding located in the magnetic field of permanent magnets, a force arises, the direction of which is determined by the rule of the left hand. The magnitude of the force is determined by the formula

  I-wl

where B is the magnetic induction, I is the magnitude of the current, O) is the number of turns,

1 - the length of the conductor in a magnetic field.

The direction of the current in the winding sections must be such that, in accordance with the rule of the left hand, the forces from each winding section are added up. This is achieved either by appropriate connection of the beginning and end of the sections of the windings, or by choosing the direction of winding the sections.

Thus, the proposed design of the electric motor provides redistribution of the magnetic flux, leads to an increase in magnetic induction and, accordingly, force and torque, which increases the efficiency of the motor and increases the working angle.

SOURCES OF INFORMATION

1. Torque motors with permanent magnets. L.I. Stokov, .I. Zykov: M., Energy, 1977, p. 67 (prototype). Director of the center of OJSC Peleng K Ai /. I. Malinka

Claims (1)

An electric motor with permanent magnets, containing two rotors, between which a magnetically conductive stator with a control winding made in the form of sections is installed, characterized in that the rotors are made in the form of magnetically conductive stepped rings with permanent magnets located on them and connected to each other, the stator is made in the form a smooth ring, while the stator control winding sections are located close to each other.