SU1275673A1 - D.c.electric gear-motor - Google Patents

Abstract

This invention relates to low power electric machines. The purpose of the invention is to simplify the design, reduce the size and weight, and reduce the labor intensity and consumption of the winding material of the direct current gear motor. The engine contains a toothed stator 1 with a coil, 2 core and a non-winding toothed rotor 3, a collector 4, two contact rings 5 and 6 pressed together with a collector 4 plastic 7, body 8, conductors 9 connecting the winding 2 core to collector 4, The brushes 10 and the brush holders I1 are fixedly connected to the shaft 12, the winding 2 core is filled with a step equal to the ratio of the number of teeth of the rotor to the number of poles of the winding core, and the number of teeth of the rotor differs from the number of teeth of the stator by the number of poles of the winding core. i Due to the use of only one winding of the core in the motor, it is simplified (design, technology, size and consumption of winding materials are reduced (2 Il.

Description

The invention relates to low-power electric machines and can be used to create low-speed DC drives.

The aim of the invention is to simplify the design, reduce the size and weight, reduce the complexity of the consumption of the magnet wire.

Figure 1 shows a DC gear motor, a general view; Fig. 2 is a circuit for connecting the winding of the core to the collector.

The engine consists of a gear stator 1c winding 2 core and a winding-free gear rotor 3, collector 4, two contact rings 5 and 6, pressed together with a collector 4 plastic 7, housing 8, conductors 9 connecting the winding core 2 with a collector 4, brushes 10 , brush holders 11, fixedly connected to the shaft 12, the winding 2 core (FIG. 2) is located in the slots of the stator 1 and connected to the plates of the collector 4 with a step equal to the ratio of the number of rotor teeth to the number of poles of the winding core,

Y 2P,

where YK is the step along the collector;

Z is the number of teeth of the rotor;

P - the number of pairs of poles winding box.

The number of teeth Zj of the rotor 3 differs from the number of teeth Z, the stator 1 by the number of poles of the winding of the core.

Z, ± 27.

7 -

Brush holders 11 with brushes 10 are offset in space relative to the axis of the rotor tooth by an angle equal to

IT

0

2Z,

The power to the winding 2 core is fed through the slip rings 5 and 6 and the brushes 10,

The number of open grooves (Fig.2) ygta: torus Z 8; rotor Z Yu; the number of poles of the winding core across the collector YH 5; the number of collector plates K 8; core type winding - simple loopback; first partial step Yf 4; the second partial step Yj Y - 1 3,

756732

Gear motor works as follows.

When a constant voltage is applied to the winding 2, the core current excitation 5 produces a magnetic flux core, which tends to set the gear rotor 3 to a position in which the magnetic resistance of the gear air gap to the magnetic flux is minimal. Due to this, a torque is generated which rotates the rotor 3 until the axis of the rotor tooth coincides with the axis of the magnetic flux core. Since the brush 15 holders 11 are offset relative to the axis of the tooth of the rotor 3 by the electric angle. 90 degrees, then this moment will be maximum. When the rotor 3 rotates, the brushes 10 enter into electric contact with successive plates of the collector 4, the axes of the flow of the root and the tooth of the rotor are again disagreeable at the electric angle 90, the pattern of flow

The 25 core and teeth of the rotor are repeated, and the rotor rotates at a low speed equal to

1 and - Tr Se 9

de i is the supply voltage;

IQ, RO current and resistance of the core; Se - constant engine

Emf cor; Pg flux spike harmonics

rotor;

Кр - coefficient of electromagnetic reduction, equal to

K i P 2G

Torque

M

where C is constant cop.

The proposed electric motor, in comparison with the known one, has a more stable design, smaller dimensions and weight due to the use of only one winding of the core in the motor

instead of two. The use of the invention allows to reduce the labor intensity of winding works and the consumption of the magnet wire,

31

Claims (1)

Invention Formula A direct current gear motor containing a serrated stator with a crust winding connected to a collector, a gearless rotor, slip rings and brushes rigidly connected to the rotor shaft, characterized by 75673 that, in order to simplify the design, reduce the size and weight, reduce the labor intensity and consumption of the winding wire, the core winding is complete with a step equal to the number of rotor teeth and the number of windings of the core, and the number of rotor teeth differs from the number of stator teeth by the number of windings cor. hZ. 2 1 Fig .. 2