SU845236A2 - Stepping motor - Google Patents

Description

(54) STEP ELECTRIC MOTOR

one

The invention relates to the field of electrical engineering, in particular to stepper motors, which are widely used in discrete electric drives and automation systems.

Basically auth. St. No. 758418 describes an engine that contains a stator with a magnetic system, having two rods with winding adjacent to the pole pieces, two permanent magnets with their pole tips magnetized in a direction parallel to the axis of the engine, and a rotor with teeth parallel to the axis engine The rods are located outside the rotor, and the pole tips of the rods are installed on both sides of each rod and are L-shaped with teeth at one end, elongated along the rotor teeth, which have ledges at their ends, with the pole tips of permanent magnets made in the form of a board, on which is fixed an annular core placed inside the rotor, with teeth located opposite the projections on the teeth of the rotor 1.

The functionality of this engine is significantly limited due to one-sided rotation of the rotor.

The purpose of the invention is to enhance the functionality of the engine by reversing.

This is achieved by the fact that the teeth of the ring-shaped core in the described motor are located opposite the teeth of the pole tips of one rod, and the hollow opposite the pole tips of the other rod.

ten

To increase the fixing moment, it is advisable to install an additional ring with teeth on its inner surface with a ring-shaped core opposite its teeth.

To increase the working moment, align the ring-shaped core opposite the rotor teeth with teeth, axes, in accordance with the ring-shaped core. which coincide with the axes of the teeth of the pole tips and which have the same width as the teeth of the rotor.

20

Claims (3)

FIG. 1 shows the described engine, a longitudinal section; in fig. 2 - the same, cross section; in fig. 3 shows schematically the relative positions of the rotor and the magnetic system of the stator at different stages of operation during one cycle. The motor contains a stator with a magnetic system having two rods 1 and 1, on which coils 2 and 2 of control windings are mounted and to which, respectively, L-shaped pole tips 3 and 3 with adjacent permanent magnets 4 and 4 mounted on them plate 5. Both rods 1 and 1 are provided with teeth 6 and 6, respectively, arranged so that teeth 7 are opposite teeth 6, and teeth 6 that are opposite these teeth 6 are located opposite teeth 6. The teeth 7 is an integral part of the ring-shaped core 8 fixed on the board 5. In the space between the teeth 7 and 6.6 a rotor 9 is placed with the teeth 10 having lugs 11 at the ends. Supports the rotor are a ring 13 with teeth 14, so that these teeth are opposite the teeth 7 of the core 8. On the remainder, the cores 8 in addition to the teeth 7 can have teeth 15 located opposite the teeth 6 and 6 and having the same width as the teeth of the rotor. The engine works as follows. In the absence of voltage on coils 2 and 2, under the action of the fixing torque of the permanent magnets 4 and 4, the rotor will take a position relative to the teeth 7, as indicated in FIG. Behind. Applying a current pulse to the coil 2 with a polarity that ensures the addition of the magnetic fluxes of this coil from the side of the permanent magnet 4 and, consequently, subtraction from the side of the magnet 4, will rotate the rotor to the position indicated in FIG. 36. In the interval between pulses under the action of the magnetic flux of permanent magnets, the rotor will take the position corresponding to FIG. Sound Applying a current pulse to the same coil with a polarity opposite to the previous one will redistribute the magnetic flux in the area of the pole pieces 3, which will rotate the rotor to the position indicated in FIG. 3g. In the interval between the next pulse due to the magnetic flux of the permanent magnets, the rotor will end the cycle, positioned relative to the pole pieces 3, as shown in FIG. 4a. Thus, each of the consecutive pulses of opposite polarity will correspond to the rotation of the rotor by one tooth division of teeth 7 in. counterclockwise. When applying different-pole pulses to the coil 2, due to the specified mutual arrangement of the teeth 7 and b in the zone of the pole pieces 3, a similar picture will be observed, but the rotor will rotate clockwise. Consequently, the switching of the roller ensures the reverse of the engine. The installation of the gear ring 13 leads to an increase in the engine torque due to the magnetic flux of the permanent magnets, which improves the dynamic and energy performance of the engine. The teeth 15 on the core 8 provide an increase in the torque developed by the engine when current passes through coils 2 and 2, which also improves the performance of the engine. (Thus, thanks to the indicated shift of teeth 7 relative to teeth 6, 6, the introduction of an additional ring with teeth 14 and providing the teeth 15 of the core 8 with the described motor acquires the possibility of two-sided rotation. In addition, its output parameters are improved. Formula 1. Stepper electric motor according to aut. St. No. 758418, characterized in that By extending the functionality of the engine by reversing, the teeth of the ring-shaped core are located opposite the teeth of the pole tips of one rod, and the hollows opposite the pole tips of the other rod. 2. An electric motor according to claim 1, characterized in that an additional ring with teeth on its inner surface is mounted concentrically with the ring-shaped core opposite its teeth. 3. Electric motor on PP. 1 and 2, characterized in that the annular core opposite the rotor teeth is provided with teeth which coincide with the axes of the teeth of the tips and which have the same width as the teeth of the rotor. Sources of information taken into account in the examination 1. USSR author's certificate in application No. 2620331/07, cl. H 02 K 37/00, 1978. § tpfft.f f