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TABLE
OF CONTENTS
【０００１】 【Field
of Industrial Application】
【Type
of Document】
Specification
of the Invention 【Title
of the invention】 Driving
Principle of the Magnetic
Motor 【Claim】 【Claim
1】 The
principle of a motor driven by the magnetic force of permanent magnets without
any electric power supply 【Detailed
Description of the Invention】 【０００１】 【Field
of Industrial Application】 This
invention relates to the principle of rotary motor and linear motor, which
depends solely on the combination arrangement of permanent magnets as its
driving force, eliminating the electromagnet used in conventional motors.
Conventional
motors are a transducer that transforms electrical energy into kinetic energy.
They are driven by the varying magnetic field obtained by controlling the
electric current carried by the electromagnet.
This means that the electrical power source is essential to activate
these motors. 【０００３】 【Problem
to be Solved by the Invention】
Different
from the conventional types, the motor of this invention does not need any
electric power source, since it utilizes the combination arrangement of
permanent magnets, as detailed in the following paragraphs, and directly
transforms their magnetic force into the driving force of the motor. 【０００４】 【Solution
for the Problem】 The
motor of this invention comprises a seamless ring of permanent magnet (1) having
north pole (or south pole) on the internal surface, and the opposite polarity on
the external surface. It also
comprises a rotating shaft (3) penetrating the center of this permanent magnet
ring. Rotors
(2) made of permanent magnet are fixed to the rotating shaft via
supporting member (4) , so that the rotors (2) are set in the vicinity of the
internal surface of the ring (1). In
this arrangement, the permanent magnet of the rotor (2) must have polarity
aligned with the tangent line of the ring (1). Following
description will be based on the two types of rotary motors.
One of them shall be called “internal rotary motor” in which the
rotors (2) are set at the internal face of the ring (1), while the other shall
be called “external rotary motor” in which the rotors (2) are set at the external face of the ring (1).
In both cases, the ring (1) will be fixed, and the rotors (2) will move
along the ring. The
permanent magnet ring (1) is considered to be a series of small magnets M1
that has magnetic moment of force M1.
Also, the permanent magnet rotor (2) is considered to be a single magnet
M2 that has magnetic moment of force M2.
Then, the force exerted by one of the small magnets M1 onto
the magnet M2 may be described as shown in 【
Fig.2 】,
which can be expressed by the equation:
(See
Electromagnetism Workshop with Detailed Explication (Kyoritsu Publishing Co.,
Ltd., ISBN4-320-03022-2) Question
#4, Page 193 for a full account of this equation.) Now, the distance “r” between the centers of M1 and M2 in 【Fig. 3】 is obtained by:
where,
R0 is the radius of the ring (1), and
r0 is the distance between the centers of M2 and M3. Further,
θ１
and
θ２
are
obtained
respectively by:
where,
ψ is
the angle between the Y-axis and the straight line connecting the centers of M1
and M2 . Consequently,
Fr and Fθ in 【Fig.3】
are determined. Fr
and Fθ obtained above can be divided into X-axis and Y-axis elements
denoted by Fx and Fy respectively through the following conversion
formula.:
Y-axis
element Fy obtained by the formula above is the driving force for the
rotors (2). The
driving force Fy ,
calculated on the following assumption, is graphically given in 【Fig.
4】by
the solid line.
（These
assumptions are also applied for obtaining the curves in 【Fig.６】
and 【Fig.
8】.） The
force expressed by the solid line in Fig. 4, however, is the force exerted by a
single magnet M1 onto the magnet M2.
Therefore, this must be integrated over one full rotation of the rotating
shaft (3) to obtain the overall driving force exerted on the rotors (2)
(expressed by dotted curve in 【Fig.
4】).
The curve shows that the integral along the Y-axis is negative (at θ=0.5
on the chart), which means that the rotors (2) will continuously rotate to the
minus direction on the Y-axis. The
calculation below is for external rotary motor performed in the same manner
based on the principle shown in 【Fig.
5】.
The
curves in 【Fig.
6】are
obtained from the calculation. It
demonstrates that the rotors (2) will move continuously to the plus direction
along the Y-axis. In this case, it
would be more practical as a motor structure to fix the rotor (2) and rotate the
ring (1). Another
possible embodiment will be a linear motor, which will be achieved by cutting
the ring (1) of this rotary motor at one point, and unfold it to make a straight
belt of magnet. The driving force of such linear motor may be calculated in the
same manner as above, based on the illustrated principle shown in 【Fig.
7】.
Specific calculation is indicated below.
The
curves in 【Fig.
8】are
obtained from the calculation. It
demonstrates that the rotor (2) will move straight in the
plus direction along the Y-axis to constitute a practical linear motor, although
the driving force is smaller than that obtained by the internal rotary motor. 【０００７】 【Advantages
of the invention】 As
described above, this motor is an energy transducer that transforms the magnetic
energy directly into the kinetic energy. Besides
proving the essential functions of the motor, it is amazingly safe and clean,
and is qualified as one of the most stable and long-lasting energy sources.
The motor of this invention will surly enjoy wide range of application. 【Brief
Description of the Drawings】 【Fig.
1】is
Oblique
Perspective View of Internal Rotary Motor. 【Index
for Numerals in Figures】 １ Permanent
Magnet Ring
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