SU1403110A1 - Method of tangential magnetization of permanent magnets incorporated in multipole rotors of dynamoelectric machines - Google Patents

Abstract

The invention relates to electrical engineering and can be used in the manufacture of electric machines with tangentially magnetized ROST-M magnets of the rotor type. The purpose of the invention is to deplete the possibility of heteropolar magnetization to saturation of high-coercive permanent magnets. The apparatus for carrying out the method comprises conductors 1-6 arranged parallel to the axis of the rotor. The conductors 1 and 4 create the main field acting on the magnet 9, and the conductors 2, 5, 3 and 6 create a compressed field acting on the magnets 8 and 7. 1 sludge. S (L o SLE

Description

The invention relates to electrical engineering and can be used in the manufacture of electrical magnets with tangentially magnetized magnets in the rotor.

The purpose of the invention is to provide the possibility of heterogeneous magnetisation to saturation of high-coercive permanent magnets.

The drawing shows a diagram of the device for rea; 1izatsii this method. : The device contains conductors 1-6,: which are located parallel to the axis of the rotor. The conduits are arranged in such a way that each of the three magnets is covered by two conductors. Moreover, these I two conductors are interconnected: in series (conductors 1 and 4, 2 and 5,; 3 and 6). Systems of conductors 2 and 5, | 3 and 6 are interconnected by a parallel 1,; Thus, the central system of the conductors 1 and 4, through which the current I flows, creates the main field, and systems 2 and 5, 3 and 6, through which the current flows 0.5 I, create a compensating field.

The conduits are connected in such a way that the floor field is opposite to the direction of the field floor. Because the main and compensating auxiliary: l are acting on the magnets simultaneously:: in order to reduce the influence of the compressed fields on the conductors 2, 5, 3, and 6, they are located a certain distance from the magpits. The distance is chosen so that the resulting magnetic field in magnets 7 and 8 has the same direction as the field in magnetite 9, but the field strength of this field should not

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five

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exceed the critical stress for the materials of the magnets (for the material of rare-earth metals, cobalt, this value is approximately equal to the coercive force by induction). After magnetizing the magnet 7, the rotor is rotated by one pole division. In this case, the polarity of the currents flowing in the conductors changes and a magnetisation of magnet 7 or 8 is produced depending on the direction of rotation. Similarly, magnetization of the remaining magnets is performed.

Claims (1)

Invention Formula The magnetization method of nostozhnyh magnets tin RZM-M in the composition of the multi. 1СУСН Р electric rotors in a tangential direction by acting on the magnets in a tangential direction by a main magnetic field with a strength sufficient to magnetize them to saturation, characterized by the magnet simultaneously with the impact on it of the main magnet. by a field of the corresponding polarity with a sufficient magnitude to magnetise the magnet to two neighboring magnets are affected by compensating magnetic fields of opposite polarity with a intensity not less than the difference between the intensity of the main magnetic field acting on these magnets and the value of the intensity corresponding to the end of the linear portion of the demagnetization curve of the material of the magpites.