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A starter/generator soft switching method for a starter/generator system

A power generation system and soft switching technology, applied in the direction of motor generator control, control system, control generator, etc., can solve the problems of complex algorithm, increase the complexity of system structure, increase the difficulty of algorithm implementation, etc., and achieve the effect of easy algorithm

Active Publication Date: 2019-07-19
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a longer motor current freewheeling time, and the algorithm is more complicated than method 1
In addition, in the above two switching methods, the converter needs to change the filter structure to avoid the overcurrent problem, which increases the complexity of the system structure and increases the difficulty of algorithm implementation

Method used

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  • A starter/generator soft switching method for a starter/generator system
  • A starter/generator soft switching method for a starter/generator system
  • A starter/generator soft switching method for a starter/generator system

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Embodiment Construction

[0050] The technical solutions and beneficial effects of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0051] The conventional AC power conversion system based on the dual-stage matrix converter used in the present invention is as follows: figure 2 As shown, it includes the following parts: starting power supply 1, load 2, switch 3 and 4, LC filter 5, two-stage matrix converter 6, starter / generator 7, motor position sensor 8, power supply / load sampling circuit 9 , a motor sampling circuit 10, a system controller 11, and a drive circuit 12, wherein the LC filter 5 is composed of a filter inductor Lf 51 and a filter capacitor Cf 52. The two-stage matrix converter 6 is composed of a bidirectional switch stage 61, a clamp circuit 62, and a unidirectional switch stage 63. The bidirectional switch stage 61 includes 6 bidirectional switches 611, and each bidirectional switch 611 is composed of 2 IGBT common emitter stages. Th...

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PUM

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Abstract

The invention discloses a start / power generation soft switching method of a start / power generation system. The method comprises steps that step S1, in a start / power generation switching process, a load is switched into a system, and a start power source and the load coexist; step S2, bidirectional switch grade modulation is carried out; step S3, closed loop control on a power source d-axis current is carried out; step S4, closed loop control on a motor current is carried out; step S5, unidirectional switch grade modulation is carried out; and step S6, when an expected value of the power source d-axis current is smaller than a switch-out threshold, a system enters a stable state, a power source side switch is opened, the start power source is switched out, and system control in a power generation state is carried out. The method is advantaged in that the method is simple and easy for realization, the DC bus voltage is guaranteed to be stable in a switching process, and start / power generation soft switching is realized.

Description

technical field [0001] The invention belongs to the field of matrix converters and starting / generating systems, and relates to a starting / generating system based on a two-stage matrix converter, in particular to a starting / generating state switching method for maintaining bus voltage stability. Background technique [0002] For a long time, engines in aircraft and other equipment have needed special electric starters (such as DC motors) or non-electric starters (such as gas turbine starters and air turbine starters) to start. The starting / power generation integrated technology enables the generator connected to the engine to be used in one machine to realize two functions of starting and power generation. When the engine is started, the starter generator works as a motor to drive the engine to rotate. After reaching a certain speed, the engine enters a self-working state; Power supply for electrical equipment. The starter / generator technology unifies the starter and the ge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/36H02P21/22H02P9/00H02P27/08
CPCH02P9/00H02P21/0003H02P21/22H02P21/36H02P27/08H02P2201/01
Inventor 陆程佳周波雷家兴周露李国壮李业
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS