SU1427514A1 - Stepping electric motor - Google Patents

Abstract

The invention relates to electrical engineering, to motors with discrete displacement, and can be used in electromechanical systems with rotational and translational motion. The goal is to extend the functionality by providing translational movement. The device includes a housing 1, inside which two stator packs 3 are placed with windings 4 controls and a rotor with two cords 7. The ring permanent magnet 5 is filled in the form of a hollow cylinder magnetized axially and rigidly closed on the stator by a nonmagnetic sleeve 6. Cylindrical The magnetic core 11 is placed with a gap between the magnetic core 7 of the rotor and the output shaft 9 and has a screw thread on the outer surface, the pitch of which is equal to the thread pitch made on the inner surface of the magnetic core 7 of the rotor. When applying control pulses to the stator winding 4, the rotor rotates and a simultaneous movement of the cylindrical magnetic circuit takes place. 3 silt C (

Description

Yu O1

The invention relates to electrical engineering, namely to electric motors with discrete displacement, and can be used in electromechanical systems with rotational and: translational motion,

; The aim of the invention is to enhance the functionality by providing translational change; 1.

Fig 1 shows a stepper motor, a longitudinal section; in fig. 2 - electric motor with four I phase winding, cross section;

 FIG. 3 is the same, with a two-phase winding.

; The stepper motor comprises a housing 1, inside which are placed the rm 2 stator, two packages 3 stators: windings 4 controls a permanent magnet 55 non-magnetic sleeve 65 two

25

35

40

cage 7 rotor with teeth 8, a single shaft-9, non-magnetic sleeve 10, cylindrical magnetic core 11,

The stator packs 3, which are axially displaced, have teeth, which are displaced relative to each other by a quarter of the teeth. They are located on the bridge 2 of the stator. The ring 30 acute magnet 5 has a fork of a hollow cylinder, is axially magnetized and rigidly fixed on the stator using a nonmagnetic sleeve. - магнит магнит с magnetic core 11 is placed with a gap between the map-shafts 7 of the rotor and the output shaft shaft 9. On the outer surface of the cylindrical magnetic conduit 11 and on the internal surface of the magnetic rotor lines there is a screw thread with the same pitch and stroke Non-magnetic sleeve 10 combines the magnetic cores 7 of the rotor B and the rigid rotor. The cylindrical magnetic pipe 11 has the possibility of translational movement by means of guides.

The main part of the magnetic flux of the permanent magnet 5 closes along the path; permanent magnet 5 magnetic core 7 of the rotor - the gap between the threads - cylindrical magic - conductor 11 - and then follow a similar path to the permanent magnet 5 A part of its flow passes along the path; permanent magnet 5 - magnetic conductor 7 of the rotor gap between its gear-3 packet 3 and the teeth of the stator package 3 - rom 2 stator - and further

20

d5

50

55

25

35

40

thirty

in a similar way to the permanent magnet 5.,

Fig 2, housing 1 and PMO 2 are not shown. The stator pack 3 has toothed protrusions 12, on which phases A, B, C, D of winding 4 are placed, with the teeth of the corresponding protrusions being displaced by a quarter of the teeth pitch.

10 rug relative to each other. When a pulse is applied to phase A, the magnetic flux of the corresponding protrusions increases and the flux of the remaining protrusions on which Ph15 is placed decreases. ZY B, C, DO As a result, the rotor takes a position in which the teeth of the rotor are opposite to the teeth of the boom 5; 1 with phase A,

When a pulse is applied to phase B

20, the flow of protrusions on which it is placed increases, and the FLOW of the remaining protrusions is weakened. The rotor rotates through an angle corresponding to a quarter of the tooth division. In this case, its teeth are set against the teeth of the protrusion with the phase B, then a pulse is applied to the phase C t, e.

Thus, when control pulses are applied in the order A – B – C – D – A – B – C – L A, the rotor rotates in the positive direction, t, it counterclockwise. In order to rotate the rotor in the reverse direction, the pulses must be given in the order A – D – C – B – A – D – C – B – A

To lock the rotor in a certain position, it is necessary to continuously pass a current on the corresponding phase.

In FIG. 3, housing 1 and PMO 2 are not shown. The stator pack 3 has toothed protrusions 12 on which phases A, B of windings 4 and notched protrusions 13 without windings are placed. Between the teeth of adjacent protrusions with phases A and B

5 there is a shift by the value of f (in FIG. 3 f T / 4, t is jagged division) Between the teeth of the projections 13 and the teeth of the projections 12 there is a shift by (T -) / 2 (in FIG. 3 - by 3/8), The teeth of adjacent protrusions 12c with phase A are shifted relative to each other by T / 2, the same takes place for teeth of adjacent protrusions 12c with phase B, the teeth of all protrusions 13 are made without shifting relative to each other. When the phases are de-energized, the rotor takes a position in which its teeth 8 are rubbed against the teeth of the projections 13. When a pulse is applied to phase A, the rotor turns on

0

five

a quarter of the teeth division into a position in which the moments on the side of the teeth of the projections 12 with phase A and the projections 13 are mutually balanced.

When the pulse of phase A is retained and the pulse is applied to phase B, the rotor rotates another quarter of the teeth division. At the same time, its teeth 8 are opposed to the slots of the projections 13, When the pulse of phase A is removed and the pulse of phase B is maintained, the rotor turns by a quarter of the tooth division to in which the moments on the side of the teeth of the projections 12 with the phase B and the 15 projections 13 are mutually balanced.

When the pulse of phase B is removed, the rotor rotates further by / 4 and takes the position in which its teeth 8 are opposite to the teeth of the projections 13 and so on, d 20

Thus, when applying control pulses in the order of 0-A-A, B-A-A-A, B-B-0, the rotor rotates in the positive direction. For the rotor to rotate in the opposite direction, 25 about 0-B-B, A-A-A-B-B, A-A-0,

To fix the rotor in that or another position, it is necessary to continuously pass current through 30 both phases, one of the phases, or leave the phases de-energized.

When the rotor is rotated by one angular pitch L of the screw, the thread on the inner surface of the magnetic cores 7 of the rotor is displaced axially relative to the thread of the cylindrical magnetic core 11 by the amount

h DS (L / 21G,

where h is the thread pitch

With this, the magnetic resistance between the threads increases and the cylindrical magnetic circuit 11 moves progressively by a step h to a position where the magnetic resistance between the threads is close to a minimum value.

If the rotor rotates one turn per N control pulses, then the linear displacement step

h h / n.

For example, if M 100iN is 5 mm, then C is 0.05 mm.

Fou Mule Invention

A stepper motor containing two axially displaced stator packages with toothed poles with control windings, a rotor with toothed magnetic cores to an annular permanent magnet placed between them, a single shaft coaxial to the rotor magnetic cores, and the teeth of the poles of the phase windings are offset relative to each other a quarter of the dentate division, characterized in that, in order to extend the functionality by providing translational movement, it is provided with a non-magnetic sleeve and a cylindrical The magnetic core, placed with a gap between the inner surface of the rotor magnetic cores and the output shaft, and on the outer surface of the cylindrical magnetic core and the inner surface of the rotor magnetic cores, is made with a screw thread with the same pitch and stroke, and the ring permanent magnet is rigidly fixed on the stator non-magnetic sleeve.

C:

f /

tt

Claims (1)

Claim A stepper motor comprising two axially displaced stator packages with toothed poles with control windings, a rotor with two toothed magnetic circuits, an annular permanent magnet placed between them, an output shaft coaxial to the rotor magnetic circuits, and the teeth of the poles of the phase windings are offset relative to each other by a quarter of tooth division characterized in that, in order to expand functionality by providing translational movement, it is equipped with a non-magnetic sleeve and a cylindrical skim yoke placed with a gap between the inner surface of the rotor magnetic circuits and the output shaft, wherein the outer surface of the cylindrical core and inner surface of the rotor magnetic circuits formed with the same screw thread pitch and swing, and the annular permanent magnet is rigidly fixed to the stator by means of a nonmagnetic sleeve.