JPH09191621A - Motor generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the overall length by disposing a cup type rotor coil for motor oppositely to and coaxially with a rotor core for generator in a housing, interposing a field magnet between inner and outer rotor coils and the connecting each rotor with a commutator and a brush. SOLUTION: A hollow tubular magnet 14 is secured to the flange part of a bearing house 15. A cup type drive rotor 11 arranged with a shaft 12 is then built in and a commutator 16 is set with a brush 17 to produce a motor part. Subsequently, a cup type rotor 13 for generation is mounted fixedly on the shift 12 and a commutator 18 for detecting frequency or r.p.m. is set with a brush 19. Furthermore, a flange 20 is fixed to the forward end of tubular magnet 14 and fitted in the housing. According to the structure, the production process is shortened while reducing the cost by decreasing the number of components and the length of product is shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a cup-type rotor for a power-generating compact coreless motor.

[0002]

2. Description of the Related Art In a conventional coreless motor with a frequency or rotation speed generator, for example, as shown in FIG. 2, a power generation rotor 3 directly connected to a shaft 2 of a drive rotor 1 on the motor main body side faces each other. , And has a structure in which multi-pole magnets 4 and 5 are respectively installed. Providing such a speed detection mechanism independent of the motor has problems that the total length becomes long, the number of parts and the number of assembling steps increase, especially in the case of a small motor, and the motor field is increased. Since two magnets for power generation 4 and magnets for power generation 5 are used, the cost is high due to the addition of the power generation magnet, and the number of steps is large and it is difficult to cope with automation.

[0003]

Such a structure is similar to the structure in which the shaft of a conventional core type motor is extended and connected to a generator part to be integrated, but in the case of a coreless motor, an air core structure is used. Therefore, since the space occupied by the rotating portion is small, the structure in which the generator is arranged inside may be rational. In view of this point, an object of the present invention is to solve the above problems by forming a coreless cup rotor with a double-inclusion structure facing each other.

According to the present invention, a cup-shaped rotor coil for a motor and a cup-shaped rotor coil for a generator are opposed to each other in a housing, and one of them is contained in the other so as to be coaxially arranged. A field magnet is provided in the middle of the inner rotor coil, and the commutator of each rotor is connected to the input terminal and the output terminal via a brush.

The structure of the present invention will be specifically described below.
The present invention relates to a first cup-shaped drive rotor with a gap in the housing, a hollow cylindrical magnet with a gap in the inner circumference of the first cup-shaped rotor, and a second cup with a gap inside the magnet. The cup-shaped power generation rotor is fixedly arranged on the coaxial shaft so as to be included in the first cup-shaped rotor and face each other. A bearing house is provided in the second cup-shaped rotor, a hollow cylindrical magnet is fixed to the flange portion of the bearing house, and the motor housing is fixed via the flange to form a motor stator. The first cup-shaped rotor functions as a drive, and the second cup-shaped rotor functions as a power generation. On the contrary, the first cup-shaped rotor coil is used for power generation and the second cup-shaped rotor coil is used for driving. It can also be used in a rotor structure.

[0006]

EXAMPLE FIG. 1 is an example of the present invention, in which a hollow cylindrical magnet 14 is fixed to a flange portion of a bearing house 15,
A cup-shaped drive rotor 11 having a shaft 12 is incorporated and a brush 17 is set in a commutator 16 to form a motor portion. Next, with respect to the shaft 12, a cup-shaped power generation rotor
After assembling 13 and fixing, the brush 19 is set on the commutator 18 for detecting the frequency or the rotation speed. Further cylindrical magnet 14
The motor generator was completed by incorporating the flange 20 into the tip and inserting the housing 6.

[0007]

The output of the φ18 mm coreless motor having the structure of the present invention was measured. As a result, at a voltage of 8 V, a current of 220 mA, a rotation speed of 1000 rpm, a load of 10 KΩ, a DG output of 0.75 V and a ripple voltage of 0.8 V or less were obtained. It was

[0008]

According to the present invention, since only one hollow cylindrical magnet is used, the material cost is reduced, and since the number of parts is reduced, the manufacturing process is shortened and the length of the motor is greatly increased. It has been shortened.

[Brief description of the drawings]

FIG. 1 is a sectional view of a motor generator according to the present invention.

FIG. 2 is a sectional view of a conventional motor with a rotation speed generator.

[Explanation of symbols]

 1,11 Drive rotor 2,12 Shaft 3,13 Power generation rotor 4 Motor field magnet 5 Power generation magnet 14 Hollow cylindrical magnet 15 Bearing house 16,18 Commutator 17,19 Brush 20 Flange 21 Motor housing

Claims (3)

[Claims] 1. A cup-shaped rotor coil for a motor and a cup-shaped rotor coil for a generator are coaxially and doubly arranged in a motor housing, and a field is provided between the outer and inner rotor coils. A motor generator characterized in that a magnet is provided and a commutator of each rotor is connected to an input terminal and an output terminal via a brush. 2. The outer rotor coil is used as a drive rotor,
The motor generator according to claim 1, wherein the inner rotor coil is set to a rotor for power generation. 3. The outer rotor coil is used as a rotor for power generation,
The motor generator according to claim 1, wherein the inner rotor coil is set as a drive rotor.