JP2002078264A - Slot-less motor stator structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slot-less motor stator structure which can be made small by forming a stator winding through formation of electrical conductive printed coils on an insulation film. SOLUTION: The slot-less motor stator structure has a stator winding (2) which is constituted of electrical conductive printed coils (11) formed by printing on an insulation film (10) and this insulation film (10) is provided on the inner face (1a) of a case (1).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slotless motor stator structure, and more particularly, to a simple and thin type in which a stator winding provided inside a case is formed of a conductive printed coil printed on a bendable insulating film. The present invention relates to a novel improvement for constituting with a stator winding.

[0002]

2. Description of the Related Art A slotless motor stator structure of this type which has been conventionally used is not shown, but a magnet wire is wound in an air core or the like inside a case which is a yoke, and further a cylinder is formed. A stator winding formed in the shape of a circle is provided, and a rotor magnet is rotatably provided in a non-contact state inside the stator winding.

[0003]

Since the conventional slotless motor stator structure is configured as described above, there are the following problems. That is, in general, the minimum thickness of a cylindrical insulator used for insulation between a stator winding and a case is determined by a molding limitation in a motor. Is a bottleneck for miniaturization. Also,
Forming this stator winding into an ideal cylindrical shape
It is extremely difficult, and it is not easy to obtain a thin cylindrical stator winding, which has been a major obstacle to downsizing the motor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and in particular, a stator winding provided inside a case is constituted by a conductive printed coil which is printed on a bendable insulating film, and is simplified. It is another object of the present invention to provide a slotless motor stator structure comprising thin stator windings.

[0005]

SUMMARY OF THE INVENTION A slotless motor stator structure according to the present invention comprises a cylindrical case made of a magnetic material, a stator winding provided inside the case, and an inner side of the stator winding. In the slotless motor stator structure in which the rotor magnet is disposed, the stator winding is formed of a conductive printed coil printed on a bendable insulating film, and the insulating film is formed of the case. Provided on the inner surface, the conductive print coil is configured to be insulated from the case by the insulating film, and the conductive print coil is formed in a square and spiral shape, In this configuration, the U-phase coil, the V-phase coil, and the W-phase coil are sequentially and independently formed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a slotless motor stator structure according to the present invention will be described below with reference to the drawings. In FIG. 2, a reference numeral 1 designates a case as a yoke made of a magnetic material having a cylindrical shape as a whole, and a cylindrical stator winding 2 is provided on an inner surface 1a of the case 1. ing.

Inside the stator winding 2, a rotor magnet 3 having a cylindrical overall shape and made of a magnet is rotatably provided, and a predetermined space is provided between the stator winding 2 and the rotor magnet 3. An annular gap 4 is formed.

[0008] The stator winding 2 is configured as shown in FIG. That is, a conductive printed coil 11 formed by a well-known printed wiring method is provided on one surface of a bendable longitudinal insulating film 10 made of an insulating material. U-phase coil 11 along the longitudinal direction
The A-phase, V-phase coil 11B and W-phase coil 11C are each formed in a rectangular shape and a spiral shape independently of each other.

The aforementioned U-phase coil 11A and V-phase coil 11
The B and W-phase coils 11C constitute a first three-phase coil unit 2A having three phases, and a second three-phase coil unit 2A is provided at a position adjacent to the first three-phase coil unit 2A. 2
The three-phase coil portion 2B is formed continuously.

In each of the three-phase coil sections 2A and 2B, each U-phase coil 11A, 11A, V-phase coil 11B,
1B and the W-phase coils 11C and 11C are wired so as to be connected in series to each other via a through-hole portion 30. In the above embodiment, the case where two sets of three-phase coil units 2A and 2B are used has been described.

The stator winding 2 is disposed on the inner surface 1a of the case 1 with an adhesive tape and an adhesive as shown in FIG. 2 by bending the insulating film 10 into a cylindrical shape. Of the stator winding 2 can be configured.

[0012]

The slotless motor stator structure according to the present invention is constructed as described above, so that the following effects can be obtained. That is, since the stator winding is formed by forming a conductive print coil on a bendable insulating film, this stator winding is compared with a conventional configuration in which a magnet wire is wound and formed into a cylindrical shape. The thickness is reduced to a fraction, and a slotless stator that is significantly thinner can be obtained.

[Brief description of the drawings]

FIG. 1 is a developed view showing a stator winding of a slotless motor stator structure according to the present invention.

FIG. 2 is a plan view showing a slotless motor stator structure using the stator winding of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Stator winding 1a Inner surface 10 Insulating film 11 Conductive print coil 11A U-phase coil 11B V-phase coil 11C W-phase coil

Continued on the front page F-term (reference) 5H002 AA06 AA07 AB01 5H603 AA01 AA09 BB01 BB09 BB12 CA01 CA05 CB01 CB22 CB23 CB26 CC02 CC19 CD01 CD04 CD13 CD25 CE06 EE09 EE12 FA02 5H604 AA08 BB01 BB10 CA03 CC03 CC03 CC02 CC04

Claims (2)

[Claims] 1. A case made of a magnetic material having a cylindrical shape.
(1) and a stator winding provided inside the case (1)
(2) and a rotor magnet inside the stator winding (2).
In the slotless motor stator structure in which (3) is arranged, the stator winding (2) is formed by a conductive printed coil (11) printed on a bendable insulating film (10). The insulating film (10) is provided on the inner surface (1a) of the case (1), and the conductive printed coil (11) is formed by the insulating film (10).
(1) A slotless motor stator structure characterized by being insulated from (1). 2. The conductive printed coil (11) is formed in a square and spiral shape and has a U-phase coil.
The slotless motor stator structure according to claim 1, wherein the (11A), the V-phase coil (11B), and the W-phase coil (11C) are sequentially and independently formed.