RU2594567C1 - Synchronous linear drive - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, namely to synchronous linear drive for acceleration of the rotor to hypersonic speeds. Rotor of hard magnetic material with residual radial magnetization is made in the form of a disc with central hole and is located between stator and guide rail of soft magnetic material. Stator winding generates running magnetic field. Interaction of magnetic fields of rotor and stator leads to force occurence, directed towards the least tension, under action of which drive along guide rail is speeded up to hypersonic speeds.

EFFECT: technical result consists in improvement of reliability.

1 cl, 1 dwg

Description

FIELD OF THE INVENTION

The invention relates to linear electric drives and can be used as a drive for a propelling installation, in railway transport, astronautics and industrial enterprises for moving vehicles.

State of the art

Known multi-stage electromagnetic accelerator of the solenoid type for throwing ferromagnetic shells (patent for invention RU 2331033, IPC F41B 6/00, publ. 10.08.2008, bull. No. 22), containing a cylindrical barrel of non-magnetic material with traction solenoids coaxially mounted on it with means switching their windings according to the signals of the control device. The device uses electromagnetic energy to disperse the warhead.

The disadvantage of a multi-stage electromagnetic accelerator is that the higher the velocity of the projectile, the faster the traction coils need to be switched, and the electromotive forces of the coil tend to maintain the current flowing in the coil when the power is turned off, thereby preventing it from being switched off. As a result of high magnetization reversal losses in the air gap between the projectile and the barrel, the installation has a low efficiency.

As the closest analogue to the claimed technical solution adopted synchronous implicit pole linear electric drive (patent for utility model RU 126227, IPC Н02K 41/03, publ. 03.20.2013. Bull. No. 8), containing a stator and rotor, composed of modules of the magnetic path , anchors, carriages, linear guides, system for determining the coordinates of the carriage so that the magnetic path module of permanent magnets is located along the longitudinal axis of the rotor of the electric drive. The stator armature module containing the phase windings is rigidly fixed to the stator carriage mounted to move along two linear guides mounted on the rotor parallel to the magnetic path.

The insufficient binding force of the armature and rotor of this model does not allow to achieve significant accelerations of the body when it is accelerated to hypersonic speeds over a fairly short distance.

Disclosed inventions

The claimed invention solves the problem of accelerating the body, for example, a missile launcher, due to the magnetic interaction of the running magnetic field of the stator with the magnetic field of the accelerated body, and increasing the reliability of the installation as a whole.

The problem is solved in that in a synchronous linear drive containing a stator with windings creating a running magnetic field, a rotor and a guide rail, according to the claimed invention, having the ability to roll under the action of magnetic forces along the guide rail, the rotor is made in the form of a body of revolution with a central hole , is radially magnetized and is located between the guide rail and the stator.

The use of a linear synchronous non-polar motor will significantly simplify the projectile accelerator according to RU patent No. 2499748, IPC B64F 1/06, F41B 6/00, publ. November 27, 2013, since all moving elements, such as the clutch, chain and drive wheels, except for the accelerated body itself, are excluded from the device. This increases the reliability of the installation as a whole.

Since electromagnetic energy is used to disperse the body, this will make it possible to realize speeds inaccessible to installations using the energy of powder gases to disperse a projectile.

The implementation of this principle of acceleration of the projectile does not require switching of large inductance coils in a short period of time, in addition, all the conductors of the stator winding are involved in the formation of the traveling field, which will reduce the magnitude of the currents flowing through the windings, and therefore reduce their weight, size and size of the allocated heat.

In order to prevent the rotor from coming off the guide rail, it is advisable to carry out the rotor with flanges, chamfers or roundings, consistent with the profile of the guide rail.

The essence of the claimed technical solution is illustrated by the drawing, which shows a schematic diagram of the drive.

The implementation of the invention

Synchronous linear drive contains a rotor 1, moving along the guide rail 2 as a result of the interaction of its own magnetic field with a traveling magnetic field created by the stator windings 3.

The conductors of the implicit pole winding 3 are laid in such a way that when a electric current is passed through them, a continuous wave of a traveling magnetic field is formed. The frequency and amplitude of the traveling magnetic field are determined by the parameters of the supply voltage, and the direction of the magnetic induction Φ must coincide with that indicated in the drawing.

The accelerated body — the rotor 1 — is a disk with a central hole of magnetically rigid material having a radial remanent magnetization Φ ′, the direction of the magnetic induction vector must coincide with that indicated in the drawing. The rotor 1 has the ability to roll the outer rim along the guide rail 2, made of soft magnetic material. The contact of the disk with the rail at point D is provided by magnetic forces. The rotor 1 is located between the stator winding 3 and the guide rail 2.

At any time, regardless of the position of the running field of the stator relative to the rotor, the relative position of the magnetic fields Ф and Ф ′ will be such that they will add up at point A and subtract at point C. Thus, the magnetic field at point A will always be greater than at point C. This leads to the appearance of a driving force F, which makes the rotor move along the guide rail. The greater the induction of the magnetic field of the rotor, the greater the difference between the field strength at points A and C and the greater the force F.

Exactly the same effect can be achieved by changing the direction of the magnetic induction of the rotor Ф ′, the traveling wave and the stator magnetic field vector Ф to the opposite.

The use of this drive will allow you to accelerate the disks to speeds significantly higher than the speeds available to firearms and, in addition, will allow you to vary the speed of each projectile in a wide range. However, reducing the number of movable elements to a minimum will improve the reliability of the installation as a whole.

Claims (2)

1. Synchronous linear drive containing a stator with windings creating a traveling magnetic field, a rotor and a guide rail, characterized in that having the ability to roll under the influence of forces of magnetic interaction along the guide rail, the rotor is made in the form of a body of revolution with a central hole, radially magnetized and located between the guide rail and the stator. 2. The drive according to claim 1, characterized in that the rotor may have flanges, chamfers or fillets, consistent with the profile of the guide rail.

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