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Parallel hybrid excitation emergency generator for aircrafts and application and control method thereof

An emergency generator and mixed excitation technology, which is applied to synchronous generators, magnetic circuit static parts, magnetic circuit rotating parts, etc., can solve the problems that affect the reliability and life of the motor, the failure of the alternator, and the waveform of the power generation. , to achieve the effect of light weight, weight reduction and burden reduction

Inactive Publication Date: 2019-06-25
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the electric excitation part is a rotor excitation synchronous generator, brushes and slip rings are required to provide excitation current for the rotor excitation winding in the traditional scheme, and the brushes and slip rings will affect the reliability and life of the motor; when the electric excitation part is a stator In the case of an excitation synchronous generator, the nature of the electric excitation part is generally a reluctance generator, and its power generation waveform is not a standard sine wave. Generally, it needs to be converted into direct current by a rectifier, so that it cannot be used as an alternator.

Method used

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  • Parallel hybrid excitation emergency generator for aircrafts and application and control method thereof
  • Parallel hybrid excitation emergency generator for aircrafts and application and control method thereof
  • Parallel hybrid excitation emergency generator for aircrafts and application and control method thereof

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Embodiment 1

[0031] like figure 1 As shown, the present invention provides an aircraft parallel hybrid excitation emergency generator, the generator is a three-stage structure, including a permanent magnet auxiliary exciter 3, a main exciter 2 and a main motor 1; the three parts are installed in the same casing Inside, the three-part rotors are installed on the same shaft 4 and rotate coaxially; wherein, the main motor 1 is a parallel hybrid excitation structure, including two parts, a permanent magnet part 6 and an electric excitation part 5, which are connected coaxially. The stator cores have the same topology and are aligned with each other, share a set of armature windings, and the main exciter 2 is installed on one side of the electric excitation part 5 .

[0032] further, as figure 2 As shown, the electric excitation part 5 includes the outer electric excitation part stator core 7, the inner electric excitation part rotor core 13, the excitation winding 12, the damping winding and...

Embodiment 2

[0042] The present invention also provides the above-mentioned control method for the parallel hybrid excitation emergency generator 18 of the aircraft. During the power generation operation, the main exciter 2 provides excitation current to the electric excitation part 5 of the main motor 1, and the excitation current is unidirectional, and the main motor 1 The direction of the magnetic potential provided by the electric excitation part 5 and the permanent magnet part 6 is the same, and the electric excitation part 5 always plays the role of magnetization.

[0043] The output of the permanent magnet auxiliary exciter 3 is supplied to the excitation winding of the main exciter 2 after being rectified and regulated by the power generation controller. The armature winding 9 of the main exciter 2 generates three-phase alternating current, which is rectified by the rotating rectifier and then fed into the main motor 1 for electricity. The field winding of the field part 5 . The ge...

Embodiment 3

[0048] The present invention also provides an aircraft emergency power supply system using the above-mentioned aircraft parallel hybrid excitation emergency generator 18, the aircraft emergency power supply system is directly driven by the ram air turbine, the emergency generator 18 is installed coaxially with the turbine, and in an emergency The aircraft is powered; the cooling method is forced air cooling, direct air is drawn from the windward side through 19 air intake pipes, and a fan is installed inside the motor at the same time.

[0049] Figure 4 It is the output voltage and current waveform of the parallel hybrid excitation generator under different working conditions. Figure 4 (a) is the no-load voltage waveform when no excitation current is provided, and the voltage reaches the rated value; Figure 4 (b) For the voltage and current waveforms when the excitation current is not provided and a small resistive load is externally connected, the voltage drops slightly, ...

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Abstract

The invention discloses a parallel hybrid excitation emergency generator for aircrafts and an application and a control method thereof. The emergency generator is driven by a ram air turbine. In emergency situations, the ram air turbine is released from the fuselage, and the ram air turbine is blown by the airflow to drive the emergency generator to generate electricity. The emergency generator isof a three-stage structure, is composed of a permanent-magnet auxiliary exciter, a main exciter and a main motor, and further includes a generator controller. The main motor of the emergency generator is a parallel hybrid excitation motor, and is divided into a permanent magnet part and an electric excitation part which share a set of main motor armature windings. The stator core is divided intosections. The magnetic circuits of the two parts do not influence each other, and the rotors of the two parts rotate coaxially. The emergency generator has the advantages of brushless excitation and simple magnetic regulation and voltage stabilization possessed by electric excitation motors and the advantages of small size, low weight and high power density possessed by permanent-magnet motors.

Description

technical field [0001] The invention relates to an aircraft emergency generator, in particular to a permanent magnet and electric excitation parallel hybrid excitation brushless motor, which belongs to the technical field of aviation motors. Background technique [0002] At present, most of the emergency generators used in aircraft are three-stage brushless synchronous generators. This type of generator has the characteristics of brushless, high reliability, and can perform voltage regulation in a wide range, but the power weight is relatively limited. In addition, there is also a permanent magnet brushless DC generator as an emergency power supply for aircraft. This type of motor generally has the characteristics of small size and light weight, but it cannot adjust the magnetic field, it is difficult to maintain the stability of the output voltage, and it can only generate electricity at a constant speed. At the same time, the excitation cannot be removed in the event of a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K19/38H02K1/14H02K1/17H02K1/27
Inventor 张卓然李进才陆嘉伟韩建斌
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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