JPH0965691A - Propulsive magnetic field generator/energy converter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly efficient propulsive magnetic field generator/ energy converter in which permanent magnets are employed. SOLUTION: Magnetic power controllers which are composed of electromagnets 31, 32,... and 36 corresponding to a plurality of respective permanent magnets 21, 22,... and 26 which are provided with spacings corresponding to the required patterns of a propulsive magnetic field are provided. The number of fluxes which are formed in an operation space 11A by the permanent magnets are changed with shifted phases by the respective magnetic power controller to generate a propulsive magnetic field. A rotary member 12 is provided in the operation space 11A of the propulsive magnetic field so as to rotate freely to generate a rotary torque in a rotor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propulsion magnetic field generator for generating various propulsion magnetic fields using a permanent magnet, and energy conversion for converting magnetic field energy into kinetic energy using the propulsion magnetic field generator. The present invention relates to a device, and more particularly to an energy conversion device useful as a rotary motor or a linear motor.

[0002]

2. Description of the Related Art In an AC synchronous motor or AC induction motor which has been conventionally used, an exciting current is generated by applying an AC voltage with a required phase difference to an exciting winding provided on a magnetic pole of a stator. Is generated to generate a rotating magnetic field, and the rotor is rotated in synchronization with this.

Similarly, in a linear motor, an exciting current is caused to flow by applying an AC voltage with a predetermined phase difference to a large number of exciting windings arranged in a straight line, thereby forming a rectilinear magnetic field and magnetizing. Propulsive force is applied to the movable body.

That is, a propulsion magnetic field generator for generating a rotating magnetic field or a rectilinear magnetic field used in a conventional rotary motor, linear motor, or the like supplies an exciting current by shifting the phases of a plurality of exciting coils. Has a structure for generating a propulsive magnetic field oriented in the required direction.

[0005]

For this reason, in an energy conversion device such as a rotary motor or a linear motor using a conventional propulsion magnetic field generator, a rotational speed or a position moving speed is set based on a phase difference of the propulsion magnetic field. It depends on the frequency of the AC power supply, and it is difficult to set the rotation speed to an arbitrary value except for some motors such as a wound induction motor,
Generally, the rotation speed is controlled using an inverter.

However, the inverter has a problem that it interferes with the control equipment in the vicinity because it generates a high frequency.

Further, in the conventional device, since the rotational force or the rectilinear force as the kinetic energy is proportional to the applied current, the power source capacity corresponding to the required torque is required, and the energy efficiency is improved. It was difficult.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a new propulsion magnetic field generating device using a permanent magnet capable of improving energy efficiency.

Another object of the present invention is to provide an energy conversion device which intermittently takes out the magnetic flux of a permanent magnet to create a propulsion magnetic field such as a rotating magnetic field or a rectilinear magnetic field, thereby operating a magnetic body. is there.

[0010]

A propulsion magnetic field generating device according to the present invention is a propulsion magnetic field generating device for generating a propulsion magnetic field in a predetermined action space, and the propulsion magnetic field generating devices are arranged at appropriate intervals according to a required generation pattern of the propulsion magnetic field. The plurality of permanent magnet members, and a plurality of magnetic flux controllers composed of electromagnets provided corresponding to the respective permanent magnet members, the number of each magnetic flux formed from the permanent magnet member in the working space, The gist is that the phase is shifted and changed by the magnetic flux controller.

In the magnetic flux controller composed of the above electromagnet, a coil is wound around a magnetic core, and one end of the magnetic core is placed in close contact with or close to one magnetic pole end of a corresponding permanent magnet to supply a current to the coil. Can be controlled, and a magnetic flux density formed in a required space from one magnetic pole end of the permanent magnet can be changed.

The above-mentioned propulsive magnetic field generator can form a rotating magnetic field by arranging permanent magnets on a predetermined circumference, and can form a rectilinear magnetic field by arranging permanent magnets on a straight line.

Further, in the energy conversion device according to the present invention, the moving member member is rotatably or slidably pivotally provided in the working space of the above-mentioned propulsive magnetic field generating device, and the propulsive magnetic field generating device is formed. The gist is that the displacement torque is generated in the mover member by the magnetic field.

[0014]

In the above propulsion magnetic field generation device, the magnetic flux density formed in the operation space from the plurality of permanent magnets arranged according to the desired propulsion magnetic field generation pattern is set by the electromagnets provided corresponding to the respective permanent magnets. The magnetic flux controller causes the phase to be changed so that a desired propulsive magnetic field is formed in the working space.

Therefore, when a rotor such as a rotatably shaft-mounted rotor or a slider such as a slidably pivotally mounted slider is arranged in the working space, a displacing propulsion magnetic field formed in the working space is arranged. Causes a torque of rotation or movement.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a propulsion magnetic field generating device and an energy converting device of the present invention will be described below in detail with reference to the drawings.

[Embodiment 1] FIG. 1 shows a DC type rotary motor. The rotary motor 10 has a cylindrical frame 11 made of a non-magnetic material, and is rotated inside the frame 11. The magnetic field generator 20 is provided and constitutes a stator side device.

An inner space of the frame 11 forms a working space 11A configured to generate a rotating propulsive magnetic field by the rotating magnetic field generator 20, and a rotor 12 made of a magnetic material of soft iron is rotated in the working space 11A. It has a structure in which it is rotatably provided via a shaft 13.

The rotary shaft 13 is located at the center axis of the frame 11 and has both ends pivotally mounted so that it is rotatable and does not move in the direction of the rotary shaft 13. The rotor 12 is a frame 11
The structure is such that it rotates integrally with the rotary shaft 13 in the inner cavity.

The rotating magnetic field generator 20 is provided with six rod-shaped permanent magnets 21, 22, ... 26 having a rectangular cross section, and each of the permanent magnets 21, 22 ,. They are arranged at equal intervals along the inner peripheral surface of the frame 11 in a direction aligned in the radial direction.

Reference numerals 41, 42, ... 46 denote yoke members embedded and fixed along the inner peripheral surface of the frame 11 as shown in the drawing, and are made of a plate-shaped permalloy which is a soft magnetic material. Each of the yoke members 41, 42 ... 4
6 is the respective arrangement position P of the permanent magnets 21, 22 ... 26
1, P2 ... P6, and the permanent magnets 21, 2 are provided.
The yoke members 41, 42 ...
It is fixed to the frame 11 so as to be in close contact with the frame 46 (fixing means is not limited).

The soft magnetic material forming the yoke members 41, 42, ... 46 is not limited to permalloy, and other magnetic materials may be used.

With the above arrangement, the arrangement positions P1, P2 and P3
Each of the N magnetic poles of the permanent magnets 21, 22 and 23 of FIG. 2 faces the rotor 12, and the S magnetic poles of the permanent magnets 24, 25 and 26 of the other arrangement positions P4, P5 and P6 face the rotor 12. Has become. (However, the orientation of the magnetic poles of the permanent magnets in each arrangement may be arbitrary and is not limited to the configuration of the illustrated embodiment.)

Reference numerals 31, 32, ... 36 denote permanent magnets 21,
26 are electromagnets configured as magnetic flux control means for controlling the magnetic flux formed in the working space 11A from each of 22 ... 26, and are provided corresponding to the permanent magnets 21, 22 ,.

Each of the electromagnets 31, 32 ... 36 is an L-shaped magnetic core 31 made of a soft magnetic material such as permalloy.
A, 32A ... 36A and these magnetic cores 31A, 32A ... 3
6A is composed of coils 31B, 32B, ... 36B each wound.

The magnetic cores 31A, 32A ... 36A are in close contact with one side of the free ends of the corresponding permanent magnets, and the respective other ends of the magnetic cores 31A, 32A ... 36A are corresponding to the yoke member 41. , 42 ... 46 are provided so as to be in close contact with each other, and six stator side magnetic poles M1,
M2 ... M6 are formed on the frame 11.

The stator side magnetic pole having the above-described structure having M1 will be described. A magnetic path including the yoke member 41 and the magnetic core 31A of the electromagnet 31 is formed between the N magnetic pole and the S magnetic pole of the permanent magnet 21.

Therefore, when no current is flowing through the coil 31B or when a current is applied to the coil 31B such that one end of the magnetic core 31A becomes the S magnetic pole, most of the magnetic flux from the permanent magnet 21 is generated. The magnetic field due to the magnetic flux from the permanent magnet 31 is not formed in the action space 11A by acting to return from the N magnetic pole to the S magnetic pole through the closed magnetic path composed of the yoke member 41 and the magnetic core 31A. (Hereinafter, this state will be referred to as "state in which magnetic flux is OFF".)

On the other hand, when a current is applied to the coil 31B so that one end of the magnetic core 31A becomes the N magnetic pole, the magnetic flux from the permanent magnet 21 passes through the closed magnetic path composed of the yoke member 41 and the magnetic core 31A. And the magnetic flux acts so as to return from the N magnetic pole to the S magnetic pole via the working space 11A.
A magnetic field generated by the magnetic flux from the permanent magnet 31 is formed in the working space 11A. (Hereinafter, this state will be referred to as "state of turning on magnetic flux".)

By controlling the current applied to the electromagnet 31 as described above, the permanent magnet 21 acts on the working space 11A.
The magnetic flux density output to the electromagnet 3 can be controlled.
1 allows ON / OFF switching of the magnetic flux output from the permanent magnet 21 to the working space 11A.

Although the stator side magnetic pole M1 has been described above, also in the other stator side magnetic poles M2, M3, ... M6, the magnetic fluxes output from the permanent magnets 22, 23, ... It is possible to perform ON / OFF switching by similarly controlling by the current flowing through 33 ... 36.

Reference numeral 50 designates the electromagnets 31, 32 ... 36.
36B is a control unit for performing switching control of the exciting current applied to each of the coils 31B, 32B, ... 36B, and turns ON / OFF the magnetic flux from the permanent magnet in each of the stator side magnetic poles M1, M2, ... M6 with a predetermined phase difference. By executing it, control is performed so as to form a rotating magnetic field in the working space 11A.

In this embodiment, the control unit 50 includes a ground terminal 50G and three pairs of output terminals 50A, 50B and 50C.
And output terminals 50A, 50B, 50C
From the first exciting voltage A1, the second exciting voltage A1
The excitation voltage A2 and the third excitation voltage A3 are configured to output three sets of excitation voltages.

The rotating magnetic field generator 20 includes the coil 3
1B and the coil 34B, the coil 32B and the coil 35B, and the coil 33B and the coil 36B are connected in series, respectively. The first exciting current is supplied to the coils 31B and 34B, the second exciting current is supplied to the coils 32B and 35B, and the third exciting current is supplied to the coils 33B and 36B.

FIG. 2 shows the excitation voltage whose phase is controlled by the control unit 50. The first excitation voltage A1,
Both the second excitation voltage A2 and the third excitation voltage A3 have a cycle T.
Is a repetitive pulse voltage of
It is shown that the positive direction exciting voltage is supplied to any one phase by shifting the phase only for the period of 3 and the negative direction exciting voltage is supplied to the remaining two phases.

When the first excitation voltage A1 is applied to the coils 31B and 34B with a positive polarity when the time T1 to T2 is reached,
One end of the magnetic core 31A of the electromagnet 31 is excited so as to have the N pole, and thereby the magnetic flux of the corresponding permanent magnet 21 is formed in the working space 11A. At this time, the magnetic core 34 of the electromagnet 34
One end of A is excited so as to have an S pole, and thereby the magnetic flux of the corresponding permanent magnet 24 is formed in the working space 11A. That is, the magnetic poles M1 and M4 on the stator side are both in the magnetic flux ON state.

At this time, the second and third excitation voltages are applied to the other coils 32B, 35B and 33B, 36B with negative polarities. Thereby, the magnetic core 32 of the electromagnet 32
An exciting current flows through both electromagnets 32 and 35 such that one end of A has an S pole and one end of magnetic core 35A of electromagnet 35 has an N pole.

Further, one end of the magnetic core 33A of the electromagnet 33 is S
An exciting current flows in both electromagnets 33 and 36 so that the magnet becomes a pole and one end of the magnetic core 36A of the electromagnet 36 becomes an N pole. That is,
In the magnetic poles M2, M3, M5 and M6 on the stator side, the magnetic flux O
Since it is in the FF state, the permanent magnets 22, 23, 2
Magnetic fluxes from 5 and 26 are not output to the working space 11A.

As a result, the permanent magnet 2 of the magnetic pole M1 on the stator side
Since the magnetic flux from the N magnetic pole of 1 enters the S magnetic pole of the permanent magnet 24 of the stator side magnetic pole M4 through the rotor 12, for example, the salient pole 12A of the rotor 12 is attracted to the stator side magnetic pole M1,
The salient poles 12C of the rotor 12 are attracted to the stator side magnetic poles M4, and the rotor 12 rotates clockwise in FIG.

As can be seen in FIG. 2, the following T2
During the period from T3 to T3, only the magnetic poles M2 and M5 on the stator side are in the magnetic flux ON state, and the salient pole 12A is on the magnetic pole M2 on the stator side.
And the salient pole 12C is attracted to the stator-side magnetic pole M5. As a result, the rotor 12 further rotates clockwise.

During the next period T3 to T4, only the magnetic poles M3 and M6 on the stator side are in the magnetic flux ON state, the salient pole 12A is attracted to the magnetic pole M3 on the stator side, and the salient pole 12C is the magnetic pole on the stator side. The rotor 12 continues to rotate in the clockwise direction after being sucked by M6.

The stator side magnetic poles M1, M2, ...
When the magnetic flux 6 is in the ON state according to a predetermined pattern, a rotating magnetic field is generated in the working space 11A, whereby a rotating torque is generated in the rotor 12, and the rotor 12 is continuously rotated in a predetermined direction. Come to do.

FIG. 3 shows a specific circuit diagram for outputting the set of excitation voltages shown in FIG. In FIG. 3, reference numeral 51 is a positive power supply for supplying a positive voltage, reference numeral 52 is a negative power supply for supplying a negative voltage, and reference numerals 53, 54 and 5 are provided.
Reference numeral 5 is a changeover switch, and reference numeral 56 is a pulse generator, which outputs a pulse CL whose level is high by ⅓ of the period T shown in FIG.

The pulse CL is the first switch control signal C
A is supplied to the changeover switch 53, and the terminal 5 is supplied when the first switch control signal CA is at a high level.
0A is connected to the positive power source 51, and the first switch control signal C
When A is at low level, terminal 50A is negative power supply 5
2 is connected. As a result, the first excitation voltage A1 shown in FIG. 2 can be supplied from the terminal 50A.

As shown in FIG. 4, the pulse CL is the second switch control signal CB delayed by the first delay circuit 57 for delaying only 1/3 of the period T, and the changeover switch 54 is subjected to the changeover control. Given as a signal. The change-over switch 54 is also similar to the change-over switch 53, and the second switch
The switching operation can be performed according to the level of the switch control signal CB, and the second excitation voltage A2 shown in FIG. 2 can be supplied from the terminal 50B.

The second delay circuit 58 delays the pulse CL by a time of ⅔ of the cycle T and outputs the third switch control signal CC shown in FIG. The changeover switch 55 operates in the same manner as other changeover switches in response to the third switch control signal CC, and can supply the third exciting current A3 shown in FIG. 2 from the terminal 50C.

As can be seen from the above description, each of the changeover switches 53, 54 and 55 shown in FIG. 3 has the times T1 to T shown in FIG.
The switching state in the period of 2 is shown.

Here, each stator side magnetic pole M1, M2 ... M6
36 required for turning on / off the magnetic flux of
The magnetic flux number Φ that determines the strength of is proportional to the product of the number N of turns of the coil and the current I flowing in the coil, and thus Φ = kNI.

ON / off of magnetic flux of permanent magnets 21, 22 ... 26
Since the value of the magnetic flux number Φ required for OFF switching is a predetermined constant value, the value of the current I for excitation can be reduced by increasing the number N of turns of the coil of the electromagnet. This can save the DC supply energy of the positive power source 51 and the negative power source 52 which are supplied to the electromagnets 31, 32, ...

In the above-mentioned embodiment, the case where the ordinary electromagnet is used has been described, but it goes without saying that the efficiency can be further improved by using a super-electric magnet as the electromagnet 31, 32. .

As described above, the rotary motor 10 of the present invention is
Since the rotating magnetic field is generated by ON / OFF switching the magnetic flux from the permanent magnet to give the rotating torque to the rotor 12, the gap between the rotor 12 and the stator can be designed very easily. Since the induction motor is a kind of transformer, it is possible to improve the efficiency of the motor by reducing the gap. However, in the rotary motor 10 of the present invention, the gap is sufficiently large for the purpose of increasing the initial suction force. A design based on this is desired.

As a result, the gap between the rotor 12 and the stator side of the rotary motor 10 can be increased, and a motor that is strong against temperature rise can be manufactured.

FIG. 5 shows an embodiment of a concrete coupling means for the permanent magnet and the electromagnet in each fixed magnetic pole. In the embodiment of FIG. 1, when the magnetic flux is ON, a strong repulsive force acts on the magnetic core of the electromagnet and the permanent magnet due to the repulsive force, so that the stator side magnetic pole M1 will be described.
The free end portion 21a of the permanent magnet 21 and the end portion 31a of the magnetic core 31A of the electromagnet 31 which is in close contact with the permanent magnet 21 are fixed by the clamp member 60 made of a non-magnetic material so that the close contact state between them is surely maintained. Configure.

[Embodiment 2] FIG. 6 shows another embodiment of the rotary motor according to the present invention. This rotary motor 7
Reference numeral 0 denotes a rotating shaft generator 80 arranged on the fixed shaft 71. The cylindrical movable member 72 made of a magnetic material is rotatably provided so as to be coaxial with the fixed shaft 71. 72 is provided with magnetic salient poles 72A, 72B ... 72D.

In addition, eight stator side magnetic poles N1, N2 ... N
8 are arranged at equal intervals in the circumferential direction of the fixed shaft 71, and magnetic salient poles 72A, 72B ... 72D are provided integrally with the movable body 72.

As shown in FIG. 7, the fixed magnetic pole N1 is a prismatic rod-shaped permanent magnet 81 similar to the permanent magnet described in the first embodiment in FIG. 1, and its axis is the axis of the fixed shaft 71. An electromagnet 9 which is fixed on the fixed shaft 71 so as to be orthogonal to each other and has a coil 91B wound around a U-shaped magnetic core 91A.
1 is provided as a magnetic flux controller.

End surfaces 91C, 91 of both legs of the magnetic core 91A
D is in close contact with the N-pole part and the S-pole part of the permanent magnet 81, respectively, thereby ensuring a magnetic path between one magnetic pole and the other magnetic pole of the permanent magnet 81 without using a yoke member. ing. The other fixed magnetic poles N2, N3 ... N8 have the same configuration.

Also in the configuration of this embodiment, the coil 91
By applying, for example, any one of the excitation voltages described in FIG. 2 to B, it is possible to similarly turn ON / OFF the magnetic flux from the permanent magnet 81 inside the movable body 72 which is the working space. It is similar to the case of the first embodiment that the rotating magnetic field can be generated by executing ON / OFF of this magnetic flux with a phase difference in the fixed magnetic poles N1, N2 ... N8.

In the case of this embodiment, for example, one set of stator-side magnetic poles having an interval of 180 ° is used and one of the stator-side magnetic poles is set to N.
Control is performed so that the pole and the other magnetic pole on the side of the stator act as the S pole, and by performing such control sequentially in one rotation direction, a rotating magnetic field for rotating the movable body 72 can be generated. .

[Embodiment 3] FIG. 8 shows still another embodiment of the present invention. This embodiment shows an example of a case where a basket type induction motor is constructed using the propulsion magnetic field generator according to the present invention.

The induction motor 100 shown in FIG.
3 is basically the same as the rotary motor 10 shown in FIG. 1 except that a basket-shaped rotor 101 is provided, and the parts corresponding to the respective parts in FIG. Is added and the section name is omitted.

The rotating magnetic field generator 120 provided in the frame 11 is the same as the rotating magnetic field generator 20 of the first embodiment shown in FIG. 1 in its basic structure, but the magnetic poles M1 and M2 on the stator side are provided. ... For the purpose of reducing the gap width between M6 and the cage rotor 101 as much as possible,
Auxiliary magnetic pole pieces 21K, 22K ... 2 at the free ends of 22 ...
The point where 6K is provided is the rotating magnetic field generator 20 described above.
Is different from

The auxiliary pole pieces 21K, 22K ... 26K are formed as salient pole portions having facing portions 21L, 22L ... 26L each having a surface having the same curvature as that of the outer peripheral surface of the cage rotor 101. These auxiliary pole pieces 21K,
The magnetic flux from the permanent magnets corresponding to the working space 11A is output from 22K ... 26K.

The electromagnets 31, 32, ... 36 of the stator side magnetic poles M1, M2, ... M6 are excited by the control unit 50 in three-phase excitation voltage, that is, the first excitation voltage A1, the second excitation voltage A2, and the third excitation voltage. A3 is supplied as in the case of FIG. 1,
As a result, a rotating magnetic field is generated in the working space 11A.

In the induction motor 100, an induced current is generated in the cage rotor 101 due to this rotating magnetic field, and the interaction between the magnetic field generated by this induced current and the magnetic fields of the magnetic poles M1, M2, ... The shaped rotor 101 is configured to rotate. The principle of rotation itself is the same as that of the conventional basket type induction motor.

However, the induction motor 100 of this embodiment is constructed so that the rotating magnetic field generator 120 uses the magnetic energy of the permanent magnets provided in the frame 11 to generate the required rotating magnetic field in the working space 11A. Therefore, by increasing the number of turns of the coil of the electromagnet, it is possible to perform ON / OFF switching of the magnetic flux by passing a slight DC current through the coil.

In the conventional induction motor, the exciting current I ₀ of the stator core is used as the energy supplied from the external power source.
And the torque current I ₁ that creates the magnetic flux that is transmitted to the rotor torque are required. However, in the case of the present invention, it is not necessary to supply the exciting current I ₀ , so that highly efficient operation can be expected. it can.

[0067]

As described above, according to the present invention, the magnetic flux from the permanent magnet is controlled by the magnetic flux controller to generate a required propulsion magnetic field such as a rotating magnetic field. Therefore, an extremely high efficiency propulsion magnetic field generator can be obtained.

Further, in the energy conversion device using the propulsion magnetic field generation device, the propulsion magnetic field generated with extremely high efficiency can be used to move the rotor or the like, so that the efficiency of the motor or the like should be improved. The effect after the present invention is extremely large.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a first embodiment of a rotary motor according to the present invention.

FIG. 2 is a waveform diagram showing waveforms of first to third excitation voltages shown in FIG.

FIG. 3 is a detailed circuit diagram of the control unit shown in FIG.

FIG. 4 is a waveform diagram of each switching control signal shown in FIG.

5 is a main part configuration diagram showing a coupled state of a permanent magnet and a magnetic core of an electromagnet in the fixed electrode of FIG. 1. FIG.

FIG. 6 is a configuration diagram showing a second embodiment of the present invention.

FIG. 7 is an enlarged view of a main part in FIG. 6;

FIG. 8 is a configuration diagram of an induction motor showing a third embodiment of the present invention.

[Explanation of symbols]

 10, 70 rotary motor 11 frame 11A working space 12 rotor 13 rotary shaft 20, 80, 120 rotary magnetic field generator 21, 22, ... 26, 81 permanent magnet 31, 32 ... 36, 91 electromagnet 41, 42 ... 46 yoke member 50 Control unit 71 Rotating shaft 72 Movable body 100 Induction motor 101 Basket rotor A1 First excitation voltage A2 Second excitation voltage A3 Third excitation voltage M1, M2 ... M6 Stator side magnetic pole N1, N2 ... N8 Stator side magnetic pole

Claims (2)

[Claims] 1. A propulsion magnetic field generator for generating a propulsion magnetic field in a predetermined action space, a plurality of permanent magnet members arranged at appropriate intervals according to a required generation pattern of the propulsion magnetic field, and each of the permanent magnet members. A plurality of magnetic flux controllers formed of correspondingly provided electromagnets, and the number of each magnetic flux formed from the permanent magnet member in the action space is changed by shifting the phase by the magnetic flux controller. A propulsion magnetic field generator characterized by the above. 2. A propulsion magnetic field generating device for generating a propulsion magnetic field in a predetermined action space, and a mover member provided in the action space, wherein the propulsion magnetic field generator forms the action space in the action space. In the energy conversion device configured to generate a displacement torque in the mover member by the propulsion magnetic field, the propulsion magnetic field generation device, a plurality of permanent magnet members arranged at appropriate intervals according to the required generation pattern of the propulsion magnetic field, A plurality of magnetic flux controllers made of electromagnets provided corresponding to the respective permanent magnet members, and the number of each magnetic flux formed in the working space from the permanent magnet members is phase-shifted by the magnetic flux controller. The energy conversion device is characterized in that it is configured to change.