JPH1169740A - Ac energy conversion driver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thin AC energy conversion driver having a plurality of output shafts in which the function of a flat induction motor having a stator and a rotor being assembled as independent units is developed furthermore through a simple structure with decreased number of parts and the plurality of output shafts can be arranged on same plane through one circuit. SOLUTION: The AC energy conversion driver comprises a field generating mechanism section 1 and a rotary drive section 2 where the field generating mechanism section 1 comprises a plurality of rotating field generating stators a, b and c connected electrically with a plurality of coil groups 3, 3,... A stator comprises rotary plates 7a, 7b and 7c abutting against the plurality of stators a, b and c and the rotational outputs from the plurality of rotary plates 7a, 7b and 7c are delivered to a plurality of output shafts 8a, 8b and 8c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention focuses on an induction motor composed of a stator and a rotor, and further develops functions of the induction motor by assembling the stator side and the rotor side separately and independently as separate tools. The present invention relates to a novel AC energy conversion driving device which mainly focuses on a rotation function in order to diversify and make the utility practical.

[0002]

2. Description of the Related Art For example, a conventional induction motor having a plurality of output shafts of this type has a stator arranged at a central portion and rotors on both side surfaces of the stator.
As the output shaft, a twin-rotor type in which the output shaft is directly connected to the rotor through the center of the stator is known, but an application range is limited because a plurality of output shafts cannot be arranged on the same plane.

An object of the present invention is to solve the above-mentioned drawbacks and to further develop the function of an induction motor in which a flat type stator and a rotor can be assembled as separate and independent devices, so that one circuit can be used on the same plane. It is an object of the present invention to provide a thin AC energy conversion drive having a plurality of output shafts, which has a simple structure, has a small number of parts, and has a plurality of output shafts.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems.
In the AC energy conversion driving device according to the present invention, in the AC energy conversion driving device in which the magnetic field generation mechanism unit 1 and the rotation driving unit 2 are separated and independent, the magnetic field generation mechanism unit 1 includes a plurality of coil groups 3, 3,. Are arranged on the same plane with a plurality of rotating magnetic field generating stators a, b, and c electrically connected to each other so as to be in contact with the upper surfaces of the plurality of stators a, b, and c, respectively. A rotor provided with rotating plates 7a, 7b, 7c is arranged, and the rotation output from the plurality of rotating plates 7a, 7b, 7c is applied to the plurality of output shafts 8a, 8b, 8c.

In order to efficiently perform power conversion in an induction motor, the magnetic gap between the stator side and the rotor side is usually set to a feasible value of 1 mm or less. In this case, the stator side and the rotor side are assembled as separate and independent instruments, and when they are assembled to face each other, the magnetic gap length is inevitably set to be approximately one digit longer than that of the induction motor. However, if the magnetic gap length is set long, the mechanical output decreases, and if the input power is increased to compensate for this, the coil group on the stator side generates more heat due to iron loss and copper loss, and the mechanical output decreases. Causes a vicious cycle.

[0006] A rotary heating cooker has already been proposed as an idea that is similar in concept in that the stator side and the rotor side of the present invention are assembled into separate separate and independent appliances (Japanese Patent Application Laid-Open No. 8-35664). .

The rotary heating cooker has a magnetic generating mechanism (hereinafter referred to as "stator side") for generating induction heating or a rotating magnetic field.
That. ), And a pan (hereinafter, referred to as a “rotor side”) in which a rotating body or a rotary wing rotatably driven by a rotating magnetic field generated from the stator side is rotatably provided inside a spindle (hereinafter, referred to as a “rotor side”). Assembled as another device, the rotor side is relatively positioned on the stator side with the magnetic gap therebetween, and the rotating body or the rotating blade is driven to rotate by the rotating magnetic field, and the rotor side is heated by induction heating to cook food. At the same time, it is configured as a device for stirring.

In this rotary heating cooker, it is disclosed that a coil for generating a magnetic field is divided into a plurality of portions and provided on a stator side. In this coil configuration, a rotating side for driving the rotor side so as to be suitable for practical use is disclosed. It is difficult to apply a magnetic field. In particular, since the rotor side is disposed relatively to the stator side with a large gap therebetween, if the rotating magnetic field is to be effectively applied to the rotor side as described above, the coil itself generates heat due to iron loss and copper loss. I can't stop doing it.

Further, it is disclosed that in the above-mentioned rotary heating cooker, the rotor side is provided with a rotating body or a rotating blade provided with a permanent magnet or a magnetized body. However, when the permanent magnet or the magnetized body is provided, an iron nail is provided. Because of the drawbacks such as drawing in, there is room for improving the configuration of the rotor side itself for practical use.

On the other hand, the present inventors focused on the rotation function, and provided a magnetic generation mechanism capable of efficiently generating a rotating magnetic field and suppressing heat generation of the coil itself, thereby driving the rotation mechanism with high performance. (Japanese Patent Application No. 8-34462).
0). This makes it possible to manufacture a practical and easy-to-use AC energy converter in which the rotor and stator are completely separated.

The present invention focuses on the rotation function, and further develops the function of an induction motor in which a flat type and a stator and a rotor can be assembled as separate separate and independent devices. It is possible to provide an output shaft, that is, the present invention provides an AC energy conversion drive, in which a plurality of stators for generating a rotating magnetic field composed of a plurality of coil groups are arranged on the same plane and the plurality of coils are provided. The groups are connected so as to be driven by one inverter drive circuit, and rotors each having a rotating plate are arranged so as to be in contact with the upper surfaces of a plurality of stators composed of the plurality of coil groups. Each has an output shaft, its stator and rotor are separated and independent, and by integrating them by mechanical fitting, AC energy with multiple output shafts To provide a conversion drive. As an application of the present invention, it is possible to apply an air cooling fan array having a plurality of blades, a ventilation fan, and the like.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic cross-sectional view of an AC energy conversion driving device showing an embodiment of the present invention, in which a magnetic field generating mechanism 1 and a rotation driving unit 2 having a plurality of rotation output shafts are separated and independent from each other. The magnetic field generating mechanism 1 includes a magnetic core 4 formed of a magnetic material at the center of the rotary drive coil 3, and a magnetic pedestal 5 formed of a magnetic material below the rotary drive coil 3 and the magnetic core 4. Are arranged on the same plane in a straight line, and comprise a housing case 6 accommodating the coil group to constitute the magnetic field generating mechanism 1. ing.

The rotary drive unit 2 includes a plurality of rotary plates 7a, 7
b, 7c, and each of the rotating plates 7a, 7b, 7c is mounted by a rotating plate mounting plate 9 directly connected to the output shafts 8a, 8b, 8c, and the output shafts 8a, 8b, 8c are provided with a bearing 10 and a bearing housing. A case 11 and a bearing holding screw 12 serving also as an output shaft holding screw are provided and held. Further, the rotation drive unit 2 including the plurality of rotating plates 7a, 7b, 7c is configured to include a rotor storage case 13, and each of the rotating plates 7a, 7b, 7c is
The magnetic field generating mechanism 1 is disposed so as to be directly above the rotating magnetic field generating stators a, b, and c.

FIG. 2 shows the rotating magnetic field generating stators a, b, c.
Are a schematic plan view and a schematic cross-sectional view showing the arrangement of a plurality of coil groups 3, 3,... Of the rotating magnetic field generating stators a, b, c.
Are connected so as to have a pair of poles and two phases, respectively, and all the coil groups 3, 3... Are connected in series. This is for driving the rotating magnetic field generating stators a, b, and c by one inverter drive circuit, and can be connected in parallel.

FIG. 3 is a schematic perspective view showing the arrangement of the rotating plate 7 of the rotary driving unit 2 and the rotating magnetic field generating stators a, b, c of the magnetic field generating mechanism 1. As shown in the figure, the respective rotating plates 7a, 7b, 7c are arranged immediately above the rotating magnetic field generating stators a, b, c of the magnetic field generating mechanism 1.

Next, an embodiment in which driving has been confirmed will be described. Using an AC energy converter in which the magnetic field generating mechanism unit 1 and the rotation driving unit 2 shown in FIG.
00 Hz and a driving power of 100 W for one phase are applied, and the rotation state of the output shafts 8a, 8b, 8c mechanically directly connected to the respective rotating plates 7a, 7b, 7c is checked, and the respective output shafts 8a, 8b, 8c are checked. Was confirmed to have the same rotation speed.

In this embodiment, the distance (Gap) between the surfaces of the magnetic cores 4, 4,... And the contact surfaces of the rotating plates 7a, 7b, 7c is 7 mm. The starting torque increases. Therefore, in the embodiment, the magnetic field generating mechanism 1
And the rotation drive unit 2 were separated and independent.
Each of them can be formed into a mechanically integrated structure. When the gap between the magnetic core and the rotary plate is reduced, the starting torque increases. Further, although the present embodiment was implemented using a relatively large AC energy converter having a driving power of 100 W (for one phase), a similar AC energy converter having a plurality of output shafts even when the driving power was a small size of 1 W or less. Converters are possible.

As described in detail above, in the AC energy conversion driving device of the present invention, a plurality of rotating magnetic field generating stators composed of a plurality of coil groups are arranged on the same plane, and the plurality of rotating magnetic field generating stators are arranged on the same plane. The coil group is connected so as to be driven by one inverter drive circuit, and a rotor having a rotating plate is arranged so as to be in contact with the upper surface of a plurality of stators comprising the plurality of coil groups. Has an output shaft, and its stator and rotor are separated and independent, and are integrated by mechanical fitting to provide an AC energy conversion drive having a plurality of output shafts. Things.

As an application of the present invention, it is possible to apply an air cooling fan array having a plurality of blades, a ventilation fan and the like. In particular, the floor area of an ultra-thin notebook PC or palm PC is completely filled with mounting components. A multi-FAN having multiple axes is arranged on the remaining side surface, and each FAN is a small FAN. By arranging the multi-FAN as a multi-FAN, it is possible to arrange an effect equivalent to a large FAN on a thin side surface.

[0020]

As described above, the present invention focuses on the rotation function, and further develops the function of an induction motor in which a flat type stator and rotor can be assembled as separate separate and independent devices, and has never been achieved before. A plurality of output shafts can be provided on the same plane. That is, according to the present invention, in an AC energy conversion driving device, a plurality of rotating magnetic field generating stators including a plurality of coil groups are arranged on the same plane,
The plurality of coil groups are connected so as to be driven by one inverter drive circuit, and a rotor having a rotating plate is arranged so as to be in contact with the upper surface of the plurality of stators including the plurality of coil groups, Each of the rotors has an output shaft, and the stator and the rotor are separated and independent from each other, and are integrated by mechanical fitting to form an AC energy conversion drive having a plurality of output shafts. To provide. As an application of the present invention, it is possible to apply an air cooling fan array having a plurality of blades, a ventilation fan, and the like.

[Brief description of the drawings]

FIG. 1 is a sectional view schematically showing an AC energy conversion driving device according to the present invention.

FIG. 2 is a diagram illustrating a magnetic field generating mechanism of the AC energy conversion driving device.

FIG. 3 is a plan view showing an arrangement of a rotary plate of a rotary drive unit of the AC energy conversion drive device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic field generation mechanism part 2 Rotation drive part 3 Rotation drive coil 4 Magnetic core 5 Magnetic pedestal 6 Housing case 7a, 7b, 7c Rotation plate 8a, 8b, 8c Rotation plate support shaft 9 Rotation plate attachment plate 10 Bearing 11 Bearing housing case 12 Bearing holding screw 13 Rotor housing case a, b, c Rotating magnetic field generating stator

Claims (1)

[Claims] In an AC energy conversion driving device in which a magnetic field generating mechanism and a rotation driving unit are separated and independent, a magnetic field generating mechanism includes a plurality of rotating magnetic fields formed by electrically connecting a plurality of coil groups. The stators for generation are arranged on the same plane, and the rotors each having a rotating plate are arranged so as to be in contact with the upper surface of the plurality of stators, and the rotation output from the plurality of rotating plates is output. An AC energy conversion drive, wherein the drive is applied to a plurality of output shafts.