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Self-excitation mixed-excitation brushless direct current power-generating system and control method thereof

A hybrid excitation and power generation system technology, which is applied to control the direction of the generator through the change of the magnetic field, can solve the problems of permanent magnet motor voltage regulation and fault demagnetization difficulties, and achieve easy self-excitation voltage buildup, reduced volume and weight, and reduced use The effect of environmental requirements

Active Publication Date: 2009-12-23
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

But there are also the problems of permanent magnet motor voltage regulation and fault demagnetization difficulties

Method used

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  • Self-excitation mixed-excitation brushless direct current power-generating system and control method thereof
  • Self-excitation mixed-excitation brushless direct current power-generating system and control method thereof
  • Self-excitation mixed-excitation brushless direct current power-generating system and control method thereof

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:

[0022] figure 1 The hybrid excitation brushless DC power generation system of this embodiment is composed of a hybrid excitation brushless DC generator, a current sensor, an excitation current detection and regulation circuit, an output current detection and regulation circuit, an output voltage detection and regulation circuit, and a digital voltage regulation controller. The output terminal of the three-phase armature winding of the tangential magnetic steel hybrid excitation synchronous motor is connected to the rectifier circuit and then outputs DC to form a hybrid excitation brushless DC generator. The output voltage of the excitation brushless DC generator is the output voltage U of the brushless DC power generation system dc , through the output current detection and conditioning circuit to detect the DC output current I L , the excitation current I is de...

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Abstract

The invention discloses a self-excitation mixed-excitation brushless direct current (DC) power-generating system and a control method thereof, belonging to the category of brushless DC power-generating systems. The power-generating system comprises a mixed-excitation brushless DC generator, a filtering capacitor, two current transformers, an excitation current detecting and regulating circuit, an output current detecting and regulating circuit, an output voltage detecting and regulating circuit and a digital voltage-regulating controller. The control method comprises three steps of control, i.e., voltage feedback control, load current feedback control and excitation current feedback control. The DC power-generating system does not need an external auxiliary power supply and can realize constant-voltage output within a wide rotating speed and large load range. The digital control leads to easy realization of parameter adjustment and modularization design. The DC power-generating system has an important application value in an independent-power-supply DC power-generating system of an airplane, a ship, an automobile, and the like.

Description

technical field [0001] The invention relates to a self-excited hybrid excitation brushless direct current power generation system and a control method thereof, belonging to the technical field of the brushless direct current power generation system. Background technique [0002] According to different excitation methods, DC motors can be divided into two categories: separately excited and self-excited. Separately excited DC motors use an external DC power supply to supply power to the motor's field windings. The field winding of a self-excited DC motor can be powered in three ways: the field winding and the armature winding are connected in series (series excitation); the field winding and the armature winding are connected in parallel (parallel excitation); The armature windings are connected in parallel (compound excitation). For self-excited DC generators, there must be enough residual magnetism in the core of the motor to start the self-excitation process, so that the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/14
Inventor 张卓然杨善水杨春源严仰光周波
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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