CN110581633A

CN110581633A - Permanent-magnet DC motor

Info

Publication number: CN110581633A
Application number: CN201810626855.3A
Authority: CN
Inventors: 刘成福
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-06-08
Filing date: 2018-06-08
Publication date: 2019-12-17

Abstract

The invention discloses a permanent magnet direct current motor, and belongs to the field of permanent magnet direct current motors. The technical contribution of the method is as follows: the casing of the stator is made into a cylinder by soft iron, four inner and outer arc-shaped salient pole type stator pole iron cores are arranged on the inner circular wall of the casing, four stator pole coils are arranged between the middle parts of the outer arcs of the four stator pole iron cores and the inner wall of the casing, every two opposite stator pole coil wire ends are connected, and four wire ends are led out and respectively connected with electric brushes on the corresponding four stator pole coil electric brush assemblies. The inner arcs of the four stator pole cores form a circle and are matched with the rotor, the permanent magnet rotor consists of a bipolar symmetrical arc permanent magnet and two arc iron plates respectively arranged at two poles, and the permanent magnet rotor is arranged in the inner arcs of the stator pole cores; the permanent magnet rotor is convenient to mount and dismount by adopting a mode that two direct current electromagnets and two arc-shaped iron plates of two poles of the permanent magnet rotor attract each other, so that a permanent magnet direct current motor with larger power can be manufactured.

Description

Permanent-magnet DC motor

The technical field is as follows:

The invention relates to a permanent magnet DC motor

background

The permanent-magnet DC motor is an improvement on the existing stator permanent-magnet DC motor, and replaces the existing stator permanent magnet with an iron-sandwiched permanent-magnet rotor. The present invention belongs to a dipolar permanent-magnet DC motor. Compared with the existing stator permanent magnet direct current motor, the permanent magnet rotor direct current motor has large power, and works in a double operation mode of magnetic repulsion and attraction, so that the motor saves more electric energy. In the permanent magnet direct current motor in the prior art, the permanent magnet is usually made into a tile shape, the shell is made into a cylindrical shape, the outer circle of the permanent magnet is arranged on the inner wall of the cylinder, the inner circle of the permanent magnet is matched with the rotor, and the permanent magnet direct current motor with the structure is inconvenient to install and disassemble under the condition of magnetic force, so that the upsizing of the motor is influenced, and the power of the direct current motor is very small.

Disclosure of Invention

The invention aims to provide a permanent magnet direct current motor, and belongs to the field of permanent magnet direct current motors. The technical contribution of the method is as follows: the stator has a cylindrical casing made of soft iron, four inner and outer arc-shaped salient pole type stator pole cores, an outer arc installed on the inner circular wall of the casing, four stator pole coils installed between the middle part of the outer arc of the stator pole core and the inner wall of the casing, two wire ends connected with the wire ends of every two opposite stator pole coils, and four wire ends connected with the corresponding electric brushes on the four stator pole coil electric brush assemblies. The inner arcs of the four stator pole cores form a circle and are matched with the rotor. The permanent magnet rotor is composed of two symmetrical arc permanent magnets at two poles and two arc iron plates respectively arranged at two poles to form an iron-sandwiched permanent magnet, a shaft hole is arranged in the middle of the permanent magnet, and a rotor shaft is arranged in the shaft hole of the permanent magnet. The permanent magnet rotor is arranged in an inner circle formed by inner arcs of four stator pole iron cores; two direct current electromagnets and two ends of two arc iron plates of the permanent magnet rotor are attracted mutually, and the permanent magnet rotor is convenient to mount and dismount, so that a permanent magnet direct current motor with larger power can be manufactured.

In order to solve the technical problem, the permanent magnet direct current motor comprises a stator and a rotor. The components that make up the stator include: the motor comprises a shell, a stator magnetic pole core, a stator magnetic pole coil, a base, a front end cover bearing, a rear end cover bearing, a power supply brush assembly, a stator coil brush assembly and the like. The components that make up the rotor include: rotor shaft, permanent magnet, arc iron plate, commutator, collecting ring, bakelite cylinder, etc. The machine shell is made into a cylinder by soft iron, the number of the stator pole iron cores is four, the stator pole iron cores are formed by punching silicon steel sheets into inner and outer arcs which are overlapped, stator pole coils are arranged between the middle parts of the outer arcs and the inner circle wall of the machine shell, the number of the stator pole coils is four, the outer arcs of the stator pole iron cores are respectively arranged on the inner circle wall of the machine shell at equal intervals, and the inner arcs form a circle and are matched with the rotor. Every two opposite stator magnetic pole coil wire ends are connected, two wire ends are led out and respectively connected with two electric brushes of the stator magnetic pole coil electric brush assembly, and the number of the electric brush assemblies is four, and the electric brush assemblies and the stator magnetic pole iron cores are correspondingly arranged on the inner side of the rear end cover. The machine seat is made of cast iron and fixed at the bottom of the machine shell by screws, the front end cover and the rear end cover are made of cast iron, the inner diameter is provided with a bearing to be matched with the rotor, and the inner diameter is matched with the machine shell. Two power supply electric brush assemblies and four stator magnetic pole coil electric brush assemblies are arranged on the inner side of the rear end cover. The rotor is composed of a permanent magnet with two arc-shaped poles, two planar ends and a shaft hole in the middle, and two arc-shaped iron plates respectively arranged on the two magnetic poles, so that the iron-sandwiched permanent magnet rotor is formed. The rotor shaft is made of a piece of shaft steel and is arranged in a shaft hole in the middle of the permanent magnet. One commutator and two collecting rings are made of copper and are respectively arranged on the outer diameter of a bakelite cylinder with an inner shaft hole, and the bakelite cylinder is arranged on a rotor shaft. The commutator is made into two half circles by copper materials and is matched with an electric brush on the stator pole coil electric brush assembly. The two collecting rings are two copper rings and are respectively matched with two electric brushes on two power supply electric brush assemblies. A conductor is respectively led out of the two collecting rings to be connected with two half circles of the commutator; two direct current electromagnets similar to the permanent magnet rotor in shape are arranged at two ends of the two-pole arc iron plates of the permanent magnet rotor, and the permanent magnet rotor is convenient to mount and dismount by adopting a mutual attraction mode, so that a permanent magnet direct current motor with higher power can be manufactured.

The invention will be described in further detail with reference to the drawings attached hereto.

Description of the drawings:

FIG. 1 is an axial cross-sectional view of one embodiment of the present invention.

Fig. 2 is a transverse cross-sectional view of one end of the commutator of fig. 1.

in the figure: the motor comprises a machine shell 1, a stator magnetic pole iron core 2, a stator magnetic pole coil 3, a machine base 4, a rotor shaft 5, a commutator 6, a permanent magnet 7, an arc iron plate 8, a front end cover 9, a rear end cover 10, a power supply brush assembly 11, a front end cover bearing 12, a rear end cover bearing 13, a stator magnetic pole coil brush assembly 14, a collecting ring 15 and a bakelite ring bobbin 16.

The specific implementation mode is as follows:

As shown in fig. 1 and 2: the invention relates to a permanent magnet direct current motor, which consists of a stator and a rotor, wherein the components forming the stator comprise: the motor comprises a machine shell 1, a stator magnetic pole iron core 2, a stator magnetic pole coil 3, a machine base 4, a rotor shaft 5, a commutator 6, a permanent magnet 7, an arc iron plate 8, a front end cover 9, a rear end cover 10, a power supply brush assembly 11, a front end cover bearing 12, a rear end cover bearing 13, a stator magnetic pole coil brush assembly 14, a collecting ring 15 and a bakelite cylinder 16. The permanent magnet direct current motor is characterized in that: the casing 1 of the permanent magnet direct current motor stator is made into a cylinder by soft iron, the magnetic pole iron core 2 of the stator is made into an inner arc and an outer arc by punching silicon steel sheets, the number of the inner arc and the outer arc are overlapped, four stator magnetic pole coils 3 are arranged between the middle part of the outer arc and the inner circular wall of the casing, the outer arcs are respectively arranged on the inner circular wall of the casing 1 at equal intervals, the inner arc forms a circle and is matched with the rotor, two wire ends of each two opposite stator magnetic pole coils 3 are connected, two wire ends are respectively led out and are respectively connected with two opposite electric brushes of an electric brush assembly 14 of the stator magnetic. The permanent magnet rotor is composed of a permanent magnet 7 with two arc-shaped poles and a shaft hole in the middle and two arc-shaped iron plates 8 respectively arranged on the two magnetic poles to form an iron-sandwiched permanent magnet rotor, a rotor shaft 5 is made of shaft steel and is arranged in the shaft hole in the middle of the permanent magnet 7, two collecting rings 15 are copper circles and are respectively arranged on the outer diameter of a bakelite cylinder 16 of the rotor shaft 5 and are matched with a power supply electric brush, the power supply electric brush assembly is arranged on the inner side of a rear end cover, a commutator 6 is made of copper materials into two half circles and is arranged on the outer diameter of the bakelite cylinder 16 of the rotor shaft 5 in parallel with the collecting rings and is matched with four stator magnetic pole coil electric brushes, and two collecting rings 15 are respectively led out a conductor to be; two direct current electromagnets similar to the permanent magnet rotor in shape are arranged at two ends of the two-pole arc iron plates 8 of the permanent magnet rotor, and the permanent magnet rotor is installed and disassembled in a mutually attracting mode.

Claims

1. A permanent magnet direct current motor is composed of a stator and a rotor, and is characterized in that: a machine shell (1) of a permanent magnet direct current motor stator is made into a cylinder by soft iron, a stator magnetic pole iron core (2) is formed by punching silicon steel sheets into inner and outer arcs and is overlapped, the number of the inner arcs is four, stator magnetic pole coils (3) are arranged between the middle part of the outer arc and the inner wall of the machine shell, the outer arcs are respectively arranged on the inner wall of the machine shell (1) at equal intervals, the inner arcs form a circle and are matched with a rotor, two wire ends of each two opposite stator magnetic pole coils (3) are connected, two wire ends are respectively led out and are respectively connected with two opposite electric brushes of a stator magnetic pole coil electric brush assembly (14), the number of the electric brush assemblies is four, the electric brush assemblies are arranged on the inner side of a rear end cover, the permanent magnet rotor is formed by arranging a permanent magnet (7) with two arc poles in the middle of a shaft hole and two arc iron plates (8) respectively arranged on the two magnetic poles, the two collecting rings (15) are copper circles, are respectively arranged on the outer diameter of a bakelite cylinder (16) on the rotor shaft (5) and are matched with a power supply electric brush, a power supply electric brush assembly is arranged on the inner side of a rear end cover, the commutator (6) is made into two half circles by copper materials, is arranged on the outer diameter of the bakelite cylinder (16) on the rotor shaft (5) in parallel with the collecting rings and is matched with four stator pole coil electric brushes, and a conductor is respectively led out of the two collecting rings (15) to be connected with the two half circles of the commutator (6); two direct current electromagnets similar to the permanent magnet rotor in shape are arranged at two ends of two arc iron plates (8) of two poles of the permanent magnet rotor, and the permanent magnet rotor is mounted and dismounted in a mutually attracting mode.