A double fractional slot concentrated winding anti-short circuit permanent magnet generator

Abstract

The invention discloses a short-circuit-resistant permanent magnet generator with double fractional-slot concentrated windings. A stator of the generator is provided with 24 slots and 20 poles; the short-circuit-resistant permanent magnet generator is characterized in that a rotor of the generator is a permanent magnet field; the stator of the generator is provided with the double fractional-slot concentrated windings, namely two three-phase symmetric fractional-slot windings are mounted in the slots of the stator of the generator, and a winding pitch is Y equal to 1; one of the two three-phase symmetric fractional-slot windings is a power generation winding which serves a main winding, and the other three-phase symmetric fractional-slot winding is an auxiliary winding; no mutual inductance exists between the auxiliary winding and the main winding, and electrodynamic potential cannot be generated by induction; the auxiliary winding and the main winding are correspondingly connected in series to externally output alternating current voltage in a three-phase three-wire manner; during stable-state operation, the auxiliary winding can suppress distortion of load current, and the nonlinear load capacity is improved; when the generator has a short circuit, the auxiliary winding suppresses short-circuit current, so that the permanent magnet generator body is high in short-circuit resistance, and the reliability of the generator and the reliability of a power supply system are improved.

Description

technical field

[0001] The invention relates to a kind of electric power equipment, in particular to a kind of anti-short-circuit permanent magnet generator with concentrated winding of double-fraction slots. Background technique

[0002] Permanent magnet generators are increasingly widely used. Permanent magnet generators have the advantages of simple structure and high efficiency, but there are also some defects, such as difficult voltage regulation, high short-circuit current at high speed, easy to cause demagnetization of permanent magnets, and easy burning of windings. The problem of difficult voltage regulation has been solved by various hybrid excitation methods, which are not involved in the scope of this invention. How to improve the short-circuit resistance of the permanent magnet generator itself is still a technical difficulty in the industry. Contents of the invention

[0003] The purpose of the present invention is to provide a new structure of the permanent...

Examples

Embodiment Construction

[0010] The present invention works and implements in this way, a kind of anti-short-circuit permanent magnet generator with concentrated winding of double-fraction slots, the main structural parameters are 24 slots in the stator, 20 poles, 3 phases, and a permanent magnet structure in the rotor; The feature is that only the stator winding structure is designed, and the stator winding is designed as a double fractional slot concentrated winding, that is, the stator winding is designed as two sets of three-phase symmetrical fractional slot concentrated windings. The node of each coil of the two sets of three-phase symmetrical windings The distance is Y=1.

[0011] One of the three-phase symmetrical windings is the power generation winding, also called the main winding. There are 24 coils in the three phases of the main winding. Each coil is directly wound on each tooth of the stator, so there are 2 conductors arranged in each slot. It is a double-layer winding, and the phase dis...

technical field

[0001] The invention relates to a kind of electric power equipment, in particular to a kind of anti-short-circuit permanent magnet generator with concentrated winding of double-fraction slots. Background technique

[0002] Permanent magnet generators are increasingly widely used. Permanent magnet generators have the advantages of simple structure and high efficiency, but there are also some defects, such as difficult voltage regulation, high short-circuit current at high speed, easy to cause demagnetization of permanent magnets, and easy burning of windings. The problem of difficult voltage regulation has been solved by various hybrid excitation methods, which are not involved in the scope of this invention. How to improve the short-circuit resistance of the permanent magnet generator itself is still a technical difficulty in the industry. Contents of the invention

[0003] The purpose of the present invention is to provide a new structure of the permanent...

Examples

Embodiment Construction

[0010] The present invention works and implements in this way, a kind of anti-short-circuit permanent magnet generator with concentrated winding of double-fraction slots, the main structural parameters are 24 slots in the stator, 20 poles, 3 phases, and a permanent magnet structure in the rotor; The feature is that only the stator winding structure is designed, and the stator winding is designed as a double fractional slot concentrated winding, that is, the stator winding is designed as two sets of three-phase symmetrical fractional slot concentrated windings. The node of each coil of the two sets of three-phase symmetrical windings The distance is Y=1.

[0011] One of the three-phase symmetrical windings is the power generation winding, also called the main winding. There are 24 coils in the three phases of the main winding. Each coil is directly wound on each tooth of the stator, so there are 2 conductors arranged in each slot. It is a double-layer winding, and the phase dis...

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