JPH07336994A - Electromagnetic induction thrust generator - Google Patents

Abstract

PURPOSE:To move inner conductive liquid and to obtain a large thrust by arranging many annular exciting coils at an equal interval outside a hollow cylinder, alternately reversing the direction of the magnetomotive forces of the adjacent exciting coils of the same phase, and generating an axially moving magnetic field on the inner surface of the cylinder. CONSTITUTION:A field core part 4 is disposed outside a nonmagnetic, nonconductive hollow cylinder 5, and exciting coils 1, 2, 3 corresponding to the number of the phases of a power source are equally arranged. When it is excited by polyphase AC, an alternating magnetic field moving longitudinally is generated on the inner surface of the cylinder 5, and an induced current flows in the inner conductive liquid to be moved toward the moving field. Thus, an induction electromagnetic thrust generator which has a simple structure, low noise, easy forward and reverse movements and speed change without generating electrochemical action due to the flow of a large DC current directly to the liquid can be obtained.

Description

Detailed Description of the Invention

[Industrial application] Propulsion of ships in the sea and transfer of conductive liquids.

2. Description of the Related Art Apart from mechanical propulsion systems, direct electromagnetic propulsion systems require a strong magnetic field in order to obtain a large thrust, and various auxiliary equipment therefor are required. It is inevitable to avoid the electrochemical action that occurs when a large direct current is applied to the ionic liquid.

A strong magnetic field is required to obtain a large thrust, but this method is intended to obtain it by increasing the strength and length of the moving magnetic field of a simple structure. Moreover, since no direct current is passed through the conductive liquid inside, the electrochemical action can be reduced.

[Means for Solving the Problems] A large number of annular exciting coils are arranged on the outside of a hollow cylinder at equal intervals as shown in the drawing, and a rectangular wave-shaped comb-shaped magnetic material such as A field portion is formed by arranging in parallel radially so as to straddle the exciting coil.

If the directions of the magnetomotive forces generated by the adjacent exciting coils of the same phase are reversed, the magnetized portions on the inner surface of the cylinder sandwiched by these exciting coils will alternately have the N and S poles of the annular magnetic pole.

[Embodiment] As shown in the drawings, if the coils corresponding to the number of phases of the power supply to be excited are equally arranged between adjacent coils of the same phase and they are excited by a multi-phase alternating current, the length of the cylinder inner surface becomes longer. An alternating magnetic field that moves in the direction is generated, an induced current flows in the conductive liquid inside, and moves in the direction of the moving magnetic field. The material of the hollow cylinder must be non-magnetic and non-conductive.

EFFECTS OF THE INVENTION The structure is simple, there are no moving parts, noise is low, it is easy to move forward and backward, and the speed can be changed easily by adjusting the voltage and frequency.

[Brief description of drawings]

FIG. 1 is a schematic structural side view of a propulsion system.

FIG. 2 is a right-angled sectional view.

[Explanation of symbols] First-phase excitation coil Second-phase excitation coil Third-phase excitation coil Field iron core part Hollow cylinder

Claims (1)

[Claims] 1. An annular polyphase exciting coil arranged so as to penetrate through a hollow cylinder so that the directions of magnetomotive forces of adjacent coils of the same phase are alternately opposite to each other, and an axial direction is formed on the inner surface of the cylinder. A method of generating a moving alternating magnetic field.