Aerial three-level electric excitation motor starting control method and aerial three-level electric excitation motor starting control device

Abstract

The invention relates to an aerial three-level electric excitation motor starting control method and an aerial three-level electric excitation motor starting control device. The method comprises the following steps of: determining the controller output voltage vector in the mode of directly controlling the module value of the voltage vector and an included angle between the voltage vector and a main generator rotor, transmitting a switching signal of a three-phase full-bridge inverter in a mode of modulating a support vector machine (SVM) through a space vector, controlling the inverter to drive the main generator, and realizing the starting function of the three-level electric excitation synchronous motor. The aerial three-level electric excitation motor starting control method has the advantages that 1) the control links are fewer, a speed ring PI regulator and a current ring PI regulator are independent, and the parameters are conveniently adjusted; 2) real-time state information of the system is not required, the acquired original information of the main generator can be processed by using a complicated filtering algorithm, the information has certain robustness on transient interference, and the control performance of the system can be effectively improved; and 3) control objectives are fewer, and the comprehensive control error caused by electromagnetic interference of an exciter on the main generator can be effectively reduced.

Description

technical field [0001] The invention relates to a starting control method and device for an aviation three-stage electric excitation synchronous motor, which is a control method and a device for realizing the starting function of an aviation three-stage electric excitation synchronous motor by using space vector modulation, and belongs to the technical field of AC motor transmission . Background technique [0002] The dual-function integration of starting / generating is an important development direction of the future aviation AC power system. At present, three-stage electric excitation synchronous motors are widely used in aviation high-power AC power systems (see figure 1 ) as a generator, if the motor can be used to start the aeroengine, it can effectively reduce the complexity of the aeropower system, reduce weight and improve reliability. However, the motor is mainly designed to meet the power generation function, and there are the following problems in the motoring st...

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Problems solved by technology

However, the motor is mainly designed to meet the power generation function, and there are the following problems in the motoring state: 1) In the static / low-speed state, the output voltage of the exciter is low, and the excitation current of the main generator is small, which seriously affects the load of the main generator The starting ability is difficult to adapt to the load characteristics of low speed and high torque during the starting process of the aero-engine; 2) There is a strong electromagnetic coupling between the main generator and the exciter of the three-stage electric excitation synchronous motor, and the brushless motor The structure makes it difficult to obtain an accurate mathematical model in the rotating state, so it is impossible to accurately decouple the collected three-phase current of the main generator

After using a three-stage electric excitation synchronous motor and MAGTROL's 2PT115-T / 2PT115-P loading platform to simulate the starting process of the aeroengine, it was found that the motor had the two problems mentioned above when it was in the electric state. Regardless of the vector control method or the direct torque control method, due to the large amount of control and the inability to accurately decouple, it is difficult to achieve a good control effect and cannot effectively utilize the load capacity of the motor

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