A kind of control method of converter parallel structure
A control method and converter technology, applied in AC motor control, control system, AC power input conversion to DC power output, etc., can solve the problems of redundant communication bus, high control cycle, slow response, etc., and achieve low system cost , simple structure, and the effect of improving energy utilization
Active Publication Date: 2022-07-15
HIWING TECH ACAD OF CASIC
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[0004] In the control method, there are master-slave control and communication control strategies between converters to balance the load, but redundant communication buses are required, which is not conducive to modular design; there is also a control method that proposes to control the current of each converter according to a given current. Separate control, more controllers, high control cycle, large amount of calculation, slow response
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[0040] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be more thoroughly understood, and will fully convey the scope of the present disclosure to those skilled in the art.
[0041] It will be understood by those skilled in the art that the singular forms "a", "an", "the" and "the" as used herein can include the plural forms as well, unless expressly stated otherwise. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of stated features, integers, steps, operations, elements and / or components, but does not exclude the...
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The present invention provides a control method for a parallel structure of converters. The parallel structure of converters includes a first converter and a second converter arranged in parallel. Calculate the output current of the converter and the second converter, and calculate the current average value of the output current of the first converter and the second converter; compare the current average value with the current reference value, and determine the space vector according to the comparison result The duty cycle modulation voltage of the pulse width modulation module; according to the duty cycle modulation voltage, the operating time of each transistor in the first converter and the second converter is calculated respectively, and the first converter is calculated according to the obtained operating time of each transistor. The working states of the converter and the second converter are controlled. The topology of the invention adopts the direct parallel connection of the converters, the structure is simple, the transformer is not needed, and the system cost is low. The control method based on the parallel structure can quickly adjust the voltage and improve the energy utilization rate.
Description
technical field [0001] The invention relates to the technical field of converter control, in particular to a control method of a parallel structure of converters. Background technique [0002] Electromagnetic catapult is a launch device that uses electromagnetic thrust to make flying objects controllable acceleration. The converter of the electromagnetic catapult system realizes the linear motion of the motor by supplying alternating currents of different frequencies and voltages to the catapult linear motor. According to the current ejection requirements, the converters are required to have larger power and higher frequency output capability. Conventional converter technology is difficult to meet the high-power and high-frequency output requirements of electromagnetic ejection. [0003] At present, in the field of high-power and high-voltage converter control, there are two main methods to improve the capacity of the converter: one is to connect devices in parallel, and th...
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IPC IPC(8): H02M7/493H02P27/08
CPCH02M7/493H02P27/085
Inventor 康颖毛凯张艳清韦克康季旭张庆杰陈松
Owner HIWING TECH ACAD OF CASIC