RU1810965C - Step motor with rolling rotor - Google Patents

Abstract

Use: in low-speed electric drives with high positioning accuracy. SUMMARY OF THE INVENTION: an electric motor comprises a base 1, on which control coils 2 are mounted, located in a magnetic circuit formed by magnets 4, rings 5 and the base of the rotor 6. The rotor is connected to the output shaft 9 by means of bearings 10 through a cam 7 and a corrugated membrane 8. The base 1 interacts with the rotor by means of serrated surfaces 11,12. The invention provides an extension of the speed range. 3 ill.

Description

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The invention relates to electrical engineering and can be used to create low-speed electric drives. positioning accuracy.

An object of the invention is to expand the speed range.

In FIG. 1 shows a general view of a stepper motor, a section; in FIG. 2 is a coil arrangement; Fig. 3 is a diagram of currents supplying the coils of an electric motor in one of the methods for controlling the electric motor when diametrically opposite coils are connected in pairs (1-1 and 1-2; 2-1 and 2-2, etc.).

The electric motor comprises a base 1. Along the perimeter of which are fixed control coils 2 located in the open gap 3. which together with the magnets 4, ring pole tips 5 form a magnetic circuit.

The disk rotor 6 is connected by means of a flexible transmission: a ball joint 7 and a corrugated membrane 8 (double connection) with the output shaft 9, rigidly connected through bearings 10, to the base 1, the Base 1 interacts with the rotor 6 through the end gear surfaces 11 and 12. The base 1 and the rotor 6 have non-magnetic parts 13 and 14, which do not create the closure of the magnetic field lines. The control coils 2 are flat in shape, elongated along a circle along which they are alternately arranged, closely adjacent to each other. The coils contain distinct parallel sections and are turned outward in a plane by the upper working part. The arrows in FIG. 2 shows the direction of current with alternating pairwise connection of coils for half-rotation of the rotor; in the subsequent semi-pumping, the direction of the currents is reversed.

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It is possible to excite the coils alternately, one by one.

The electric motor operates as follows. When feeding pairs of coils, a force is generated to press the rotor against the base 1 from one coil and the force of repulsion by the diametrically opposite coil. This is due to the fact that when current flows through the turns of a winding located in a magnetic field, a force of interaction with the rotor is created, the direction of which depends on the direction of the current and magnetic flux and is determined by the rule of the left hand. By alternately energizing the pairs of coils and due to the circumferential movement of the forces of attraction and repulsion created by the coils, the rotor is driven; the end gear surface 11 of the rotor is rolled around the fixed gear surface 12 of the base 1. Due to the high rigidity of the flexible gear, the rotation without twisting is transmitted with high accuracy to the output shaft 9, which receives discrete increments in increments determined by the reduction coefficient on the gear surfaces 11, 12 .

Thus, the advantage of the proposed motor over the prototype is that thanks to the use of coils having a small inductance, which does not affect the slew rate of the current and the permanent magnets interacting with the field, they are achieved

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expanding the speed range of the electric motor.

Claims (3)

1. A stepping motor with a rolling rotor, comprising coils located around the perimeter of the base on which the front teeth are made, a disk rotor with end teeth meshed with the teeth of the base, and an output shaft on which the disk rotor is fixed using a ball joint and a corrugated membrane, characterized in that, in order to expand the speed range, the axis of the coils are perpendicular to the axis of the output shaft, the rotor is equipped with permanent magnets magnetized along the axis of the output shaft and installed bubbled along two concentric circles, the poles of the magnets are provided with annular pole pieces, coils are arranged between the permanent magnets and a base part, which has the coil and the rotor, which has permanent magnets with pole pieces are formed by nonmagnetic. 2. The electric motor according to claim 1, with the fact that the permanent magnets are made in the form of rings 3. The electric motor according to claim 1, with the fact that the permanent magnets are made in the form of separate elements placed between the annular pole pieces. Figure 1 Order 1450 Mintage Subscription VNIIIPI of the State Committee for Inventions and Discover at the USSR State Committee for Science and Technology 113035, Moscow, Zh-35, Rauska nab., 4/5