CN101447725B

CN101447725B - Side sensing permanent magnet DC motor

Info

Publication number: CN101447725B
Application number: CN2008101722565A
Authority: CN
Inventors: 刘盛荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-04-28
Filing date: 2008-11-03
Publication date: 2011-05-04
Anticipated expiration: 2028-11-03
Also published as: CN101295906A; CN101447725A

Abstract

The invention discloses a side sensing permanent magnet DC motor which comprises a motor body, end covers, a rotor, commutators and electric brushes. The permanent magnet DC motor is characterized in that permanent-magnets of the motor are respectively arranged on the opposite surfaces of the two end covers at the two ends of the motor body to form a permanent magnet stator, the rotor takes a thin disk shape, the winding direction of rotor coils is vertical to the axial direction, each of the coils is configured with a commutator, and each of the commutators is configured with a pair of electric brushes. The side sensing permanent magnet DC motor can conveniently enlarge the area of a magnet pole face between the stator and the rotor, thus increasing the moment of the rotor. Compared with the existing DC motor having the same power as that of the side sensing permanent magnet DC motor, the side sensing permanent magnet DC motor saves over 50% of electrical energy, has high output power and can provide power for vehicles.

Description

A kind of side sensing permanent magnet DC motor

The present invention relates to a kind of permanent magnet direct current motor, specifically, relate to a kind of side sensing permanent magnet DC motor.

The stator field of existing permanent magnet direct current motor is to be made of the two relative permanent magnets of heteropole that are arranged on the body medial surface.During the work of this permanent magnet direct current motor, because of stationary part saves consumption to electric energy, and produce comparing with the power DC motor of stator field with electric energy, economize on electricity can reach more than 50%.But this permanent magnet direct current motor power output is little, and range of application also is only limited to for compact electric apparatus (as electric shaver etc.) provides power.

The objective of the invention is, the problem that exists at above-mentioned prior art provides a kind of side sensing permanent magnet DC motor that other vehicle such as automobile provides power that can be.This invention rotor rotation moment is big, power output is big, and compares and can economize on electricity more than 50% with the power DC motor.

The present invention realizes like this, it comprises body, respectively is provided with permanent magnet and constitutes stator field on the two end cap opposite face at body two ends, and its pole-face is respectively: a semi circular surface of each end cap is the N utmost point, second half disc is the S utmost point, relative with homopolarity, thin disk type rotor is housed in stator field, thin disk type rotor has three coils, apart hexagonal angle, rotor coil around to axially vertical, approach disk type rotor and be provided with three commutators, a side end cap is provided with three pairs of brushes.Each coil is furnished with a commutator, and each commutator is furnished with a pair of brush.

The present invention is provided with permanent magnet to constitute stator field on the two end cap opposite face at body two ends, the rotor that is installed in the magnetic field is thin dish type, be convenient to increase the area of stator and rotor pole face like this, thereby increase rotor torque, has high-power output, save the power consumption of stationary part because of this invention, so power-saving, saves energy can reach more than 50%.

The concrete structure of this invention is provided by following embodiment and accompanying drawing thereof.

Fig. 1 is the elevation cross-sectional view of side sensing permanent magnet DC motor concrete structure of the present invention.

Fig. 2 is the right view of the thin disk type rotor of side sensing permanent magnet DC motor of the present invention.

Fig. 3 is the elevation cross-sectional view of the thin disk type rotor of side sensing permanent magnet DC motor of the present invention.

Fig. 4 to Fig. 9 whenever clockwise rotates 60 ° of angles, its rotor coil situation of change schematic diagram for the thin disk type rotor of side sensing permanent magnet DC motor of the present invention in permanent-magnet stator magnetic field.

Figure 10 is the elevation cross-sectional view of another embodiment of side sensing permanent magnet DC motor of the present invention.

With reference to Fig. 1: the two ends of body 1 are equipped with end cap 2 and end cap 3 respectively, at end cap 2 and end cap 3 opposite faces permanent magnet 8 are set respectively, and the pole-face of permanent magnet 8 opposite faces is respectively: first disc of each end cap is the N utmost point, and second disc is the S utmost point; Constitute permanent-magnet stator magnetic field relatively with homopolarity.Book disk type rotor 4 is housed in the middle of stator field, and thin disk type rotor 4 comprises coil 5 and three commutator 6 Fig. 3, and coil 5 has three apart hexagonal angle Fig. 2.Each coil 5 is furnished with a commutator 6, and each commutator 6 is furnished with a pair of brush 7.In Fig. 4 to Fig. 9, indicate the set permanent magnet 8 of end cap 2 and end cap 3 opposite faces, the polarity of the permanent-magnet stator magnetic field opposite face that is constituted respectively.Approach disk type rotor 4 in permanent-magnet stator magnetic field for ease of illustrating, the situation of change of three coils 5 when whenever clockwise rotating 60 ° of angles, three coils 5 are represented with a, b, c respectively.Describe working condition of the present invention in detail below in conjunction with Fig. 4 to Fig. 9.

At first, DC power supply feeds rotor coil 5 through brush 7 and commutator 6, rotor 4 rotates in a clockwise direction, when coil 5a rotates to (its symmetrical center line perpendicular to the reader time) Fig. 4 farthest from the reader, the commutator 6 conversion senses of current that this moment and coil 5a match, promptly above the coil 5a and bottom surface is the N utmost point, above the coil 5b and bottom surface still is the N utmost point, above the coil 5c and bottom surface still is the S utmost point, and coil 5a, b, c are subjected to rotating torque, and rotor 4 continues the clockwise direction rotation.

Rotor 4 continues clockwise direction and rotates to 60 ° of angles, coil 5b rotates to nearest (its symmetrical center line perpendicular to the reader time) Fig. 5 from the reader, the commutator 6 conversion senses of current that match with coil 5b this moment, be above the coil 5b and the bottom surface be the S utmost point, above the coil 5c and bottom surface still is the S utmost point, above the coil 5a and bottom surface still is the N utmost point, and coil 5b, c, a are subjected to rotating torque, and rotor 4 continues the clockwise direction rotation.

Rotor 4 continues clockwise direction and rotates to 60 ° of angles, coil 5c rotates to (its symmetrical center line perpendicular to the reader time) Fig. 6 farthest from the reader, the commutator 6 conversion senses of current that match with coil 5c this moment, be above the coil 5c and the bottom surface be the N utmost point, above the coil 5a and bottom surface still is the N utmost point, above the coil 5b and bottom surface still be the S utmost point, coil 5ca, b, is subjected to rotating torque, and rotor 4 continues clockwise directions and rotates.

Rotor 4 continues clockwise direction and rotates to 60 ° of angles, coil 5a rotates to nearest (its symmetrical center line perpendicular to the reader time) Fig. 7 from the reader, the commutator 6 conversion senses of current that match with coil 5a this moment, be above the coil 5a and the bottom surface be the S utmost point, above the coil 5b and bottom surface still is the S utmost point, above the coil 5c and bottom surface still is the N utmost point, and coil 5a, b, c are subjected to rotating torque, and rotor 4 continues the clockwise direction rotation.

Rotor 4 continues clockwise direction and rotates to 60 ° of angles, coil 5b rotates to (its symmetrical center line perpendicular to the reader time) Fig. 8 farthest from the reader, the commutator 6 conversion senses of current that match with coil 5b this moment, be above the coil 5b and the bottom surface be the N utmost point, above the coil 5c and bottom surface still is the N utmost point, above the coil 5a and bottom surface still is the S utmost point, and coil 5b, c, a are subjected to rotating torque, and rotor 4 continues the clockwise direction rotation.

Rotor 4 continues clockwise direction and rotates to 60 jiaos, coil 5c rotates to nearest (its symmetrical center line perpendicular to the reader time) Fig. 9 from the reader, the commutator 6 conversion senses of current that match with coil 5c this moment, be above the coil 5c and the bottom surface be the S utmost point, above the coil 5a and bottom surface still is the S utmost point, above the coil 5b and bottom surface still is the N utmost point, and coil 5c, a, b are subjected to rotating torque, and rotor 4 continues the clockwise direction rotation.

Rotor 4 continues clockwise direction and rotates to 60 ° of angles, is repeated to Fig. 4 (having rotated 360 °), and rotor 4 is rotated continuously.

Figure 10 is another execution mode of side sensing permanent magnet DC motor of the present invention, and the structure of this side sensing permanent magnet DC motor and side sensing permanent magnet DC motor shown in Figure 1 is basic identical.The permanent magnet 8 that its difference is to be arranged on end cap 2 and end cap 3 opposite faces is relative with heteropole, two ends are heteropole during rotor coil 5 work.Because of permanent magnet 8 constitutes uniform magnetic field relatively for heteropole, thereby during thin disk type rotor work (rotation), some metal partly has eddy current to produce and reduces its service behaviour, and this makes design and makes more complicated than a last scheme, but in full force and effect.

Claims

1. side sensing permanent magnet DC motor, it comprises body, end cap, rotor, commutator and brush, it is characterized in that: permanent magnet (8) is arranged on first end cap (2) and second end cap (3) opposite face and constitutes permanent-magnet stator, its pole-face is respectively: a semi circular surface of each end cap is the N utmost point, second half disc is the S utmost point, relative with homopolarity, its rotor (4) is thin dish type, device is in the middle of permanent-magnet stator, on rotor (4), be provided with 3 rotor coils (5), rotor coil (5) around to axial vertical and apart hexagonal angle, each rotor coil (5) is connected to a commutator (6) separately, commutator (6) is to be made of two metal semi-rings insulated from each other, each commutator (6) is furnished with a pair of brush (7), each rotor coil (5) centre tap is terminals, and head and the tail link together and are another terminals, so that the two ends of rotor coil (5) produce identical magnetic pole.