JP2009005570A - Structure of electric motor characteristics to reduce power consumption by carrying out maximum utilization of the magnetic lines of force of permanent magnet acting on rotor of permanent magnet electric motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To arrange an electromagnet in a configuration to effectively affect an attractive or repulsive force from a stator magnet over a magnetic line in the rotor permanent magnet of a permanent-magnet synchronous motor, and to effectively convert the supplied electrical energy into torque energy. <P>SOLUTION: A rotor is designed as a thin disc so as to fix the permanent magnet in the outer periphery. An outer stator is fixed to effectively have an effect on the magnetic line generated in all directions of the permanent magnet over the magnetic line in the permanent magnet of the stator, so as to surround the permanent magnet of the rotor in all directions. Due to this design, leaking magnetic line can be minimized with a large number of effective lines, and electrical energy can be converted into torque component, even with a small amount of electric power. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a motor that achieves high torque generation with bottom power consumption for the purpose of structurally improving a motor using permanent magnets and maximizing the magnetic field lines of permanent magnets. is there.

Conventionally, in a permanent magnet motor, an attraction or repulsion force is used as a motor torque by applying a current to the motor and applying a line of magnetic force.
In the case of a permanent magnet, this magnetic field line is based on the fact that there is a magnetic field line unique to the permanent magnet to be used, and if the magnetic field line is used as much as possible, even if the current supplied from the outside of the motor is small, the torque conversion effect is good. .
Conventionally, an electric motor uses a rotor and a stator to generate a magnetic field line by applying current to one or the other, generating torque by the repulsion or attraction effect of the magnetic force, converting electric energy into rotational energy and using it for power.
In these cases, the shape of the motor is usually an inner rotor or an outer rotor. There are flat flat motors, but even in the inner rotor type, the outer rotor type, and the flat motor type, the magnetic field generated in the rotor part is partly used as leakage magnetic force, and many of them are not used. The structure was not available.
The leakage magnetic force seems to be a slight force. For example, in the case of a battery-type timepiece, if the running time is long and continuous, a slight difference in energy loss is also caused in the battery life.
In the present invention, a permanent magnet fixed to the outer periphery of the rotor is surrounded from four directions, and the limited magnetic field lines that normally come out of the permanent magnets are affected by the inner and outer rotors. The problem was solved as a structure in which the flat rotor is oriented from four directions where more magnetic lines of force can be used.

In the case of a conventional permanent magnet synchronous motor, it is necessary to improve the demagnetization resistance of the permanent magnet, but there are methods of increasing the volume of the permanent magnet or increasing the number of poles. Among them, increasing the size of the permanent magnet increases the cost. It is better to select the number of poles appropriately. However, the conventional stator design does not surround the permanent magnet, so it is designed to improve the demagnetization resistance. There were difficulties.
The structure surrounding the rotor's permanent magnet was instantaneously surrounded, and the problem was solved by appropriate voltage and current control on the electromagnet.
When the rotor permanent magnet was controlled and output from one side by an electromagnet, a large amount of current was consumed, resulting in energy loss.
In the all-enclosed electromagnet method, since the electromagnet coils are dispersed, the energy supply is optimally controlled for the variable output with little heat accumulation. Wasteful power consumption was also reduced.

According to the conventional motor, in the permanent magnet synchronous motor, the magnetic field generated by the permanent magnet of the rotor has leakage magnetic field lines from one side of the stator electromagnet due to the working structure, and the magnetic field generated by the permanent magnet on the rotor side is utilized to the maximum. Needed structural improvements.
In a motor that generates torque with minute electric power, it is necessary to minimize the leakage magnetic field lines, minimize energy loss, and convert electric energy into torque energy.

In the present invention, the permanent magnet on the outer periphery of the rotor is designed to be surrounded by an electromagnet stator from four directions, so that the magnetic force of the stator attracts or repels most of the lines of magnetic force generated by the permanent magnet of the rotor. That was ensured.

A rotor using a permanent magnet generates a magnetic field line unique to the permanent magnet in all directions, and there is a limit to the total amount of the magnetic field line. Or the effect of rebound became large.

In order to improve the motor performance, the permanent magnet used for the rotor of the permanent magnet synchronous motor uses a high-performance permanent magnet with a large residual magnetic flux density. The current was applied to the electromagnet to control the movement smoothly, but the design that surrounded the permanent magnet with the electromagnet made it easier to control the electric magnetic force.

In the case of a permanent magnet synchronous motor, when the motor rotates at high speed, so-called weak magnetic field operation is a good method. In this case, the stator electric field is controlled, so the rotor permanent magnet is surrounded in all directions. The structure is easy to control.
As a result, the output in the high speed range and the torque increase became easy.
That is, the high-efficiency operation area of the permanent magnet synchronous motor has been widened.

Hereinafter, the best mode for carrying out the present invention will be described by way of examples.

Although FIG. 1 and FIG. 2 are illustrated as examples, the theory is a method attributed to the same theory.
1 to 12 in FIG. 1 are arrangement front views of the stator. The stator electromagnetic coils 15, 16, 18, and 19 are partial cross-sectional views of the side surface of the motor. As shown in this figure, the rotor permanent magnet is surrounded from four directions. Coil input terminals are provided at 13, 1417 and 20, and energization control is performed from the electric control device.
The rotor 23 and the permanent magnet 22 were fixed by sandwiching the permanent magnet 22 with the fixing bracket 21 and fixing it to the rotor 23. 1 represents a permanent magnet 29 used for the rotor and a magnetic force line 28 generated around the permanent magnet 29. From the outside of the circular orbit 30 around the center of the motor and the cylindrical shape 31 curved on the outer periphery of the rotor 23. The stator electromagnet 32 was arranged along the circular track 30 from four directions.

The bearing 42 is mounted on the motor mounting frame 41, and the torque is extracted from the torque output shaft from the output shaft 43. The stator and the rotors 35, 36, 39, 40, 37, 38 are arranged symmetrically with respect to the output shaft center. It is the arranged partial cross-section side view. The coil input terminals 24, 25, 26, and 27 are each energized from the electric control device, and perform control specific to the permanent magnet synchronous motor.

As for FIG. 2 as well, it was possible to increase the efficiency of electric energy and torque energy as a motor with the same design and electric control as in FIG.

  The assembly diagram and partial cross section of the arrangement of the permanent magnet rotor and the electromagnet stator, which can increase the attractive or repulsive effect up to the leakage magnetic field line by the design in which the electromagnet stator surrounds the permanent magnet rotor according to the present invention It is a side view.   Although it is equivalent to FIG. 1 of this invention and the function and effect | action are the same, it is a front view and a side view of a partial cross section as a slightly different example of design.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stator electromagnet 2 Stator electromagnet 3 Stator electromagnet 4 Stator electromagnet 5 Stator electromagnet 6 Stator electromagnet 7 Stator electromagnet 8 Stator electromagnet 9 Stator electromagnet 10 Stator electromagnet 11 Stator electromagnet 12 Stator electromagnet 13 Fixed Child coil input terminal 14 Stator coil input terminal 15 Stator coil 16 Stator coil 17 Stator coil input terminal 18 Stator coil 19 Stator coil 20 Stator coil input terminal 21 Rotor permanent magnet fixing bracket 22 Permanent magnet 23 Rotor frame 24 Stator Coil Input Terminal 25 Stator Coil Input Terminal 26 Stator Coil Input Terminal 27 Stator Coil Input Terminal 28 Curved Cylinder Rotor Permanent Magnet Magnetic Field Line 29 Curved Cylinder Rotor Permanent Magnet 30 Curved Cylinder Rotor Permanent Magnet Rotating Orbit Center Line 31 Curved Cylinder Rotor permanent magnet 32 Stator Electromagnetic field line concentration working surface 33 Stator electromagnet coil 34 Stator electromagnet coil energization terminal 35 Stator electromagnet coil 36 Stator electromagnet coil 37 Rotor permanent magnet fixing bracket 38 Curved cylindrical rotor permanent magnet 39 Stator electromagnet coil 40 Stator electromagnet coil 41 Motor fixed mounting frame 42 Moke main shaft rotary bearing 43 Motor output shaft 44 Stator electromagnet 45 Stator electromagnet 46 Stator electromagnet 47 Rotor permanent magnet 48 Stator electromagnet 49 Rotor frame 50 Motor output shaft 51 Rotor support bearing 52 Rotor support bearing 53 Fixed Child electromagnet 54 Stator electromagnet 55 Rotor permanent magnet 56 Stator electromagnet 57 Stator electromagnet 58 Stator electromagnet input terminal 59 Stator electromagnet input terminal 60 Stator electromagnet input terminal 61 Stator electromagnet input terminal 6 The stator electromagnets 63 stator electromagnets 64 stator electromagnets 65 motor mounting frame 66 stator electromagnets input terminal 67 stator electromagnets input terminal 68 stator electromagnets input terminal 69 stator electromagnets input terminal 70 the motor output shaft

Claims (3)

A permanent magnet is inserted in the outer periphery of the disk, and a permanent magnet of the rotor fixed to the outer periphery is surrounded by electromagnets from four sides at the maximum. N and S poles are made continuously in this electromagnet. The motor structure is characterized by rotating with voltage applied. The motor according to claim 1 is a direct current or alternating current synchronous motor system, but the permanent magnet mounting method is improved, and the external electromagnet surrounding the magnetic field lines of the magnet fixed to the rotor is generated from the permanent magnets of the rotor. A structure that uses a lot of magnetic field lines and minimizes the magnetic field lines to attract or repel. The motor structure is characterized by ensuring the torque even when the current flowing through the motor's electromagnet stator is reduced by minimizing the leakage flux that does not act on the permanent magnets of the rotor.

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