Method for applying matrix converter to excitation at starting period of three-level synchronous motor
A matrix converter and synchronous motor technology, which is applied to synchronous generator control, starting devices, and controlling generators through magnetic field changes, can solve problems such as reducing device reliability and increasing device volume and weight, and achieves high reliability, high reliability, and high reliability. The effect of convenient control and less control signal
Inactive Publication Date: 2014-05-28
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
The single-phase inverter can only be powered by the onboard battery instead of the ground power vehicle; there is a large energy storage capacitor on the DC side of the AC-DC-AC converter, which increases the volume and weight of the device and reduces the reliability of the device
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[0031] The present invention will be further described below.
[0032] The circuit structure that the present invention adopts can refer to figure 1 , including a three-phase LC filter 1 and a three-phase-single-phase matrix converter 2, the input power is connected to the three-phase input terminal of the three-phase-single-phase matrix converter 2 through the three-phase LC filter 1, and the three-phase-single-phase matrix The single-phase output end of the converter 2 is connected to the excitation winding 3 of the main exciter of the three-stage synchronous motor. Among them: the input power can be three-phase AC input or DC input, the three-phase AC input comes from the Ground Power Unit (GPU) at the airport, and the DC input comes from the onboard battery; the three-phase LC filter 1 is used as the input filter An inductor is connected in series with each phase, and a capacitor is connected in parallel between every two phases; the three-phase-single-phase matrix conver...
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The invention discloses a method for applying a matrix converter to excitation at the starting period of a three-level synchronous motor, belonging to the technical field of the power conversion of aviation starting and generating system. The method is as follows: a power conversion structure with triple-phase input and single-phase output formed by a triple-phase LC filter and a triple-phase-and-single-phase matrix converter is adopted, the triple-phase-and-single-phase matrix converter is of a triple-phase full bridge circuit structure formed by six two-way switch tubes, and a single phase output end of the triple-phase full bridge circuit structure is connected with an excitation winding of a main exciter of the three-level synchronous motor. According to the method, SVPWM (Space Vector Pulse Width Modulation) strategy combined with SPWM (Sinusoidal Pulse Width Modulation) strategy is adopted, the power supply input can adopt triple-phase alternating current input or direct-current input, the output end can output direct current, and positive-negative symmetrical rectangular wave current and single-phase sinusoidal alternating current so as to realize the function multiplexing. According to the method, a rectifier and an inverter are combined into a whole, so that the control is convenient, furthermore, the high-capacitance energy storing link is not contained, so that the reliability is high, and also the application value is high.
Description
technical field [0001] The invention relates to a power conversion circuit for the excitation of a three-stage synchronous motor in the starting stage, in particular to a method for applying a matrix converter to the excitation in the starting stage of a three-stage synchronous motor, and belongs to the technical field of electric power conversion for aviation starting and generating systems. Background technique [0002] The matrix converter (MC) does not contain energy storage capacitors, has the advantages of compact structure, small volume and weight, high stability, and long service life, and can work in harsh environments. The three-phase-single-phase matrix converter reduces the number of switching tubes while maintaining the advantages of the traditional matrix converter. It has good application value in the occasions of three-phase input and single-phase output, such as three-phase rectification, three-phase-single-phase Intersecting and alternating conversion, DC e...
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Login to View More IPC IPC(8): H02P6/20H02P9/30H02P103/20
Inventor 刘兵周波秦显慧谢江华邢栋雷家兴梁莹
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS