JPH101904A - AC electromagnet type magnetic attracting levitation linear motor conveyor - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To supply electric power to a vehicle in a non-contact manner by using an electromagnetic induction action between a ground side and a vehicle side to supply electric power to the vehicle without using a battery on the vehicle. The present invention provides an AC electromagnet type magnetic attracting and floating linear motor transport device capable of performing the following. A rail (1) on which a U-shaped core (3) provided with an induced current generating winding (4) and a primary side (6) of a linear motor are arranged.
And a vehicle 2 which is attracted to the rail 1 and floats and travels by being provided with the levitation core 8 provided with the induction current generating winding 4 and the secondary conductor 11 of the linear motor for traveling.
It is characterized by comprising a control device 10 for adjusting the gap G based on a detection value of a gap sensor 12 for detecting a gap G between the flying core 8 and the rail 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AC electromagnet type magnetic attraction linear motor transfer device, and more particularly to a transfer device for transporting various articles in a clean room in a non-contact manner to suppress dust generation. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AC electromagnet type magnetic attraction linear motor transfer device.

[0002]

2. Description of the Related Art Conventionally, in a transfer method in a clean room, a vehicle is floated on rails and travels in a non-contact manner in order to suppress dust generation. The magnetic levitation method used for this non-contact running uses a suction force acting between the magnetic rail for running and the electromagnet by mounting a DC electromagnet for suction levitation on the vehicle, and the adjustment of the gap between the rail and the electromagnet is performed. This is done by the current from the battery mounted on the vehicle.

[0003]

The above-described conventional electromagnet-type magnetically attracted and levitated linear motor carrier requires a battery for a DC power supply on a vehicle.
There are problems such as the need for a dedicated station for charging and one or more spare vehicles in place of the vehicle being charged, and the problems of equipment and space, and a large economic burden. SUMMARY OF THE INVENTION The present invention solves the problems of the above-described conventional electromagnet-type magnetically attracted levitation linear motor transport device, eliminates the battery on the vehicle, and supplies an electromagnetic induction between the ground side and the vehicle side to supply power to the vehicle. It is an object of the present invention to provide an AC electromagnet type magnetic attracting and floating linear motor transport device capable of supplying ground-side power to a vehicle side in a non-contact manner by using a magnetic head.

[0004]

In order to achieve the above object, an AC electromagnet type magnetic attraction floating linear motor carrier of the present invention comprises a U-shaped core provided with a winding for generating an induced current and a primary side of a linear motor. A vehicle that is provided with a rail, a levitation core provided with a winding for induced current generation, and a secondary conductor of a linear motor for traveling, which is attracted to the rail and floats to travel, and a levitation core and a rail. And a controller that adjusts the gap based on the detection value of the gap sensor that detects the gap.

The AC electromagnet type magnetic attraction levitating linear motor transport device of the present invention having the above-described structure uses an AC power source on the ground side to generate an induced current in the windings of the electromagnets for levitating provided on the vehicle side, and to apply a load. Even if the gap between the rail and the secondary side of the linear motor changes due to changes in the magnetic field, the magnitude of the magnetic flux flowing from the ground-side electromagnet to the floating electromagnet on the vehicle can be increased or decreased by the magnetic flux generated from the winding of the floating electromagnet. The gap value required for stable levitation can be maintained, and the magnetic flux of the levitation electromagnet is controlled by the gap adjustment controller, so the gap value accuracy is improved and the control power is supplied in a non-contact manner So that dust generation can be suppressed.

[0006] The rail is made of a laminated iron plate, and two rails can be arranged in parallel.

The AC electromagnet-type magnetically levitating linear motor transport device of the present invention having the above-mentioned structure can supply power to a suction levitating core mounted on a peakle in a non-contact manner.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an AC electromagnet type magnetic attracting and floating linear motor conveying apparatus according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a rail laid along a traveling path of a vehicle 2, and the rail 1 employs a laminated iron plate rail in which a plurality of iron plates having a required plate pressure, length, and width are laminated. The rails 1 are formed as a pair of two units arranged in parallel at a predetermined interval, and are continuously arranged along the traveling path.

Also, one unit of parallel rails 1, 1
A U-shaped core 3 having a U-shape on the ground side is disposed therebetween, and a winding 4 of the U-shaped core 3 is connected to a ground-side power supply 5 for levitation control to supply a required power.

On the ground side along the rail 1, a traveling linear motor primary side 6 is provided. This traveling linear motor 1
Although the secondary side 6 is arranged along the rail, it may be arranged continuously along the rail, or may be arranged discontinuously (intermittently). Is generated intermittently, but the vehicle travels by inertia in a portion where no linear motor 6 is provided.

The interval between the primary linear motors 6 for traveling is determined so that the inertial traveling can maintain a predetermined speed, and a linear motor power supply 7 is connected to the primary motor 6 for traveling. Connecting.

The vehicle 2 is provided with one or more U-shaped suction levitation cores 8 as shown. The number and intervals of the suction levitation cores 8 are determined so that the vehicle can run stably. In the illustrated embodiment, two units are provided at appropriate intervals. Then, a winding 9 for non-contact power feeding is wound around each core 8,
This winding 9 is connected to a control device 10 mounted on the vehicle 1.

A secondary motor-side conductor 11 (reaction plate) is disposed on the vehicle. The vehicle is caused to travel by generating a thrust by feeding the linear motor secondary side conductor 11 to the traveling linear motor. In this case, the vehicle is caused to float and the rail and the suction floating core 8 are moved.
, That is, the gap G is controlled by the control device so as to be a predetermined interval. The detection of the gap G is performed by the gap sensor 12 provided in the vehicle 2.

Accordingly, the magnetic flux of the alternating magnetic field generated by applying an AC current to the winding of the ground-side U-shaped core from the AC power source passes through the gap between the laminated iron plate rail and the suction-floating core on the vehicle side and returns to the original position. Form a loop path that results in a ground-side U-shaped core. At this time, a suction force is generated between the rails at the four sections of the vehicle-side suction floating core facing the rail and the rail, thereby causing the vehicle to float.

Further, an induced current is generated in the winding of the levitation core. By controlling the size by a control device on the vehicle, the suction floating force can be adjusted.
As a result, if the suction levitation force or the levitation amount changes due to a change in the load mounted on the vehicle, a change in the position of the levitation core with respect to the ground-side U-shaped core, and a change in power supply, the gap is changed from a predetermined value. It can be kept at a predetermined value. For this reason, the gap sensor 12 is provided on the vehicle in the vicinity of each levitation core, so that the gap between the rail and the levitation core can be detected in real time, so that traveling can be stably performed with high accuracy.

The rails are arranged in accordance with the traveling route of the vehicle, and the primary side of the linear motor for traveling is appropriately arranged between the two rails or on the ground side near as necessary. The vehicle is equipped with a linear motor secondary-side conductor portion, and the vehicle travels in a non-contact floating state with the rail due to the thrust generated by the interaction between the linear motor primary side and the secondary-side conductor. When the primary side of the linear motor is intermittently arranged, the vehicle runs in the space between the motors by the inertia of the vehicle. In the embodiment, a three-phase AC induction motor is used as a linear motor, but the type of this motor is not limited.

[0018]

According to the AC electromagnet type magnetic attraction levitating linear motor transfer device of the present invention, the control power required on the peak is obtained by the induction current from the winding applied to the levitating core, thereby making it possible to perform non-contact. Power to the vehicle,
There is no problem of dust generation, there is no need to lay a power supply plate, and there are advantages such as simplification of the configuration of equipment, improvement in economy and maintainability.

According to the invention described in claim 2,
Since two rails made of laminated iron plates are arranged in parallel, an induced current is generated in the suction-floating core mounted on the peakle and power can be supplied in a non-contact manner.

[Brief description of the drawings]

FIG. 1 is an external perspective explanatory view showing a first embodiment of an AC electromagnet type magnetic attracting and floating linear motor transport device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rail 2 Vehicle 3 U-shaped core 4 Winding 5 Ground-side power supply for levitation control 6 Primary linear motor for traveling 7 Linear motor power supply 8 Core for suction levitation 9 Non-contact power supply winding 10 Controller 11 Linear motor secondary side Conductor 12 Gap sensor G gap

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shohei Furukawa 3-11-1, Shimosakabe, Amagasaki City, Hyogo Prefecture

Claims (2)

[Claims] 1. A U-shaped core provided with an induction current generating winding and a rail provided with a primary side of a linear motor, and a levitation core provided with an induction current generating winding and a traveling linear motor. A vehicle that is attracted to the rail and floats and travels by including the secondary conductor, and a control device that adjusts the gap based on a detection value of a gap sensor that detects a gap between the floating core and the rail. An AC electromagnet type magnetic suction levitation linear motor transfer device characterized by the following. 2. The AC electromagnet type magnetic attracting and floating linear motor transfer device according to claim 1, wherein the rail is made of a laminated iron plate and two rails are arranged in parallel.