JPS60162463A - Revolving-field type dc motor - Google Patents

Abstract

PURPOSE:To improve the utility efficiency of an inner space by moving a winding portion to a stator side as a revolving-field type, and disposing on the inner periphery of a motor housing. CONSTITUTION:A revolving field type DC motor is provided with an armature winding 5 annularly wound on a stator annular core 4 on the inner periphery of a housing 7 and a commutator ring 11 connected with the winding, and rotatably with a rotor 6 made of a field permanent magnet, a brush 8 and a current collecting ring 9. The energization from a DC power source 12 to the winding 5 is achieved by setting the positional relation of brushes 8 to produce the pole position of a stator by the ring 11 at the position displaced by 90 deg. of an electric angle with respect to the pole position of the permanent magnet field through the brush 10 on the housing 7, the ring 9 and the brushes 8 on the rotor 6.

Description

[Detailed Description of the Invention] Field of Application The present invention relates to a small i′j current electric motor used for the rotational power of portable equipment, etc., which is particularly preferred to be illustrated. There is C''.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a conventional example and its problems A conventional small DC motor will be explained with reference to FIG. In Fig. 1, 1 is the armature core, 2 is the armature winding,
3 is a field permanent magnet. As described above, the conventional small DC motor has a structure in which the armature rotates inside the field permanent magnet 3. In small DC motors, permanent magnets are used exclusively as field magnets rather than wire-wound type motors because the volume of the field part is smaller to obtain the same magnetic flux under practical conditions. The torque T of a DC motor is expressed as: T...(Zla)・Φ/2π (Zlal product of the number of armature conductors and armature current (electrical loading): Field flux (magnetic loading) As the diameter of the small DC electric machine shown in the figure is made smaller, the area that the armature winding 2 can occupy decreases in proportion to the square of the diameter, and although the magnetic loading does not decrease significantly, the electrical loading decreases. Because the torque is large, the torque rapidly decreases as the diameter becomes smaller, making it difficult to design for ultra-miniaturization.Also, from the point of view of the utilization efficiency of the space inside the motor, the I band is dead. There's a lot of space.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned drawbacks of the conventional art. (;? The purpose is to offer.

Structure of the invention L) The rotating field of the present invention 5゛4
The DC electric motor FJIXI consists of a fixed F made of an L"5-shaped core that carries an annular winding, and a rotating F made of a permanent magnet with a neck 1 and 11 in the diameter /j direction, which is pivotally supported inside the stator. , the annular winding of the fixed r ; ) is J8 piled and the commutator ring is fixed to IK+ on the one-tar housing, and the rotating ?-?l
ll F (the '1st
1 of the current collector ring, which is connected to the first radial of J, and fixed to the seventh housing, -C front t1 [: 4 parts of lI'i current power source to the current collector ring. A second brush, which receives power from

Rinawa J), further downsizing of small DC motors,
= Meni 1, direct (For the rotor part, where the cross-sectional beat is reduced by 11 due to the miniaturization of Y, is it possible to use permanent magnets, which are more efficient in space utilization than windings, but can have various monthly interest rates? Ij
According to the publication, the DC electric VJ machine of the present invention has a fixed f that can provide a large surface area for the winding part that hinders the downsizing of the rotating armature type. It was moved to the side, and as an annular winding [arranged evenly on the inner circumferential surface of the motor housing] to eliminate the double space, and to improve the efficiency of space utilization inside the motor, compared to the rotary armature type with the same output. J, sea urchin that can be made smaller 1. :bO) There is C.

DESCRIPTION OF THE EMBODIMENTS 1. An embodiment of the present invention will be explained based on the drawings.

Figure 3 is a schematic cross-sectional view along the direction perpendicular to the axial direction of 1 (rotating field type self-current type f in one embodiment of the present invention) + 1. 4 is a schematic rrJi plane view along the axial direction of a magnetic type DC motor, 4 is a stator annular core, 5 is an armature winding annularly wound around the stator annular core 4, 6 is a rotor made of field permanent magnets, 7 is a motor housing, E3 is fixed to the shaft of the rotor 6, and the rotor 6 is fixed to the shaft of the rotor 6.
1 is a rotating brush, 9 is a brush ε) connected to the rotor 6, and 10 is a current collector 1 and 9.
4) Installed in the motor housing ``l'' to supply power to the
The brush 111 is connected to the winding part and fixed to the housing 7, and the brush 111 is connected to the winding.

The current supplied from the li'i current power source 12 is
The current is transmitted to the circuit 7 side through the current collector ring 9 which is fixed to the motor housing 7 (the brush 10 attached to the rotor 7) and the rotating brush 10, and the current is further transmitted to the 7 side. The rotor 6 is fixedly installed in the saw brush 8.The brush 8 and the commutator ring 111 are rotated by the rotating rotor 6. (Regarding the ship's position, the 1114 position on the fixed r side is always shifted to positions i and 9j with an electrical angle deviation of 90 degrees. It is from et al.

Stator 10σ lunar eclipse (~ is shown in Figure 4 1 (tll <
, electric aIIr winding5. "-2 t supplied with DC power
:, occurs at j. Accordingly, [the brushes 8 are at 1 electrical angle from each other]
The positional relationship between the permanent magnet (j field magnet 4 and the brush 8) which is 80 degrees forward and turned 1 degree.

If the stator magnetic poles are set at 1) 0° electrical angle with respect to the 11-pole neck of the permanent magnet, a small DC motor that rotates continuously can be obtained.

ADVANTAGES OF THE INVENTION According to the present invention, the limit 1. - The permanent magnet and iron core (22 windings and I front body) in the space are arranged to suit the respective characteristics of F (and L) C. In order to improve utilization efficiency, the diameter of small DC motors has been reduced. In the current situation, the present invention [1] is useful for downsizing the entire small device.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of the small DC motor J machine of LT America taken along the direction perpendicular to the axial direction. A schematic cross-sectional view of FO in the J direction that intersects the axial direction of the Senki u゛1, Figure 3 is the same rotation y
- (Schematic sectional view along the axial direction of the company type 0°i current #J machine,
Figure 4 shows the same rotating field J4'! Explanatory diagram of the operating principle of an in-current motor (-) 4... Stator annular t-score, Mi 3... Electric current is 1π line,
6...rotation j', 7... -terhousing, 8,
10...Zorashi, 9...Collector ring, 11...Commutator ring, 12...White) A≧Power supply cost Yoshihiro Moriki 1st factor 2nd figure 3rd factor 4th figure

Claims (1)

[Scope of Claims] 1. A stator consisting of an annular iron core extending around an annular winding, and a rotation r consisting of a permanent magnet pivotally supported inside the stator and freely magnetized in the direction I; a commutator ring connected to the fixed annular winding and fixed to the starter housing;
a first brush fixedly attached to the rotor shaft and feeding power to the commutator ring; an electric ring connected to the first brush;
[011] A rotary field type DC electric motor (a rotary field type DC electric motor) comprising a second brush fixed to the motor housing and supplying power to the current collector ring from an external DC source 7Ui (815).