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Inverter control method and system

A control method and inverter technology, which is applied in the direction of control/regulation systems, instruments, and adjustment of electrical variables, etc., can solve the problems of current impact and large command value, and achieve the reduction of current impact, stable rise of output voltage, and small capacitance impact Effect

Active Publication Date: 2022-03-25
CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present application provides an inverter control method and system to at least solve the problem of current impact caused by a large command value

Method used

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  • Inverter control method and system
  • Inverter control method and system
  • Inverter control method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] This example discloses the specific implementation of the inverter control method (hereinafter referred to as the "method").

[0091] The present invention is directed to Image 6 The shown two-stage inverter structure, the front stage is a DCDC module, and the rear stage is a DCAC module. The soft-start and transition to steady state control ideas of the DCDC module and the DCAC module are described in detail. The additional hardware circuit and the flexible and controllable start-up time greatly reduce the current impact, protect the system components, avoid false triggering of faults, and improve the reliability of the system.

[0092] The technical scheme implementation process adopted in the present invention is as follows:

[0093] 1) Initialization of system control parameters, cycle detection of the start commands of DCDC and DCAC, the initial state is the standby start state, the initialized control parameters include the PID variable parameters of the DCDC mo...

Embodiment 2

[0116] Please refer to Figure 4 , Figure 4 It is a schematic structural diagram of the inverter control system of the present invention. like image 3 An inverter control system of the present invention is shown, including:

[0117] a system control parameter initialization module, wherein the system control parameter initialization module cyclically detects the startup commands of the DCDC module and the DCAC module;

[0118] DCDC module soft start module, after the DCDC module soft start module detects the start command of the DCDC module, soft start the DCDC module according to the DCDC module start process;

[0119] The DCAC module soft start module, after the DCAC module soft start module detects the start command of the DCAC module, soft start the DCAC module according to the DCAC module start process.

[0120] Wherein, the initialized control parameters include:

[0121] The PID variable parameters of the DCDC module and the DCAC module, the soft start flag bit a...

Embodiment 3

[0138] combine Figure 5 As shown, this embodiment discloses a specific implementation of a computer device. The computer device may include a processor 81 and a memory 82 storing computer program instructions.

[0139] Specifically, the above-mentioned processor 81 may include a central processing unit (CPU), or a specific integrated circuit (Application Specific Integrated Circuit, ASIC for short), or may be configured as one or more integrated circuits implementing the embodiments of the present application.

[0140] Among others, memory 82 may include mass storage for data or instructions. By way of example and not limitation, the memory 82 may include a hard disk drive (HDD), a floppy disk drive, a solid state drive (SSD), flash memory, optical disk, magneto-optical disk, magnetic tape, or universal serial bus (Universal SerialBus, abbreviated as USB) drive or a combination of two or more of these. Memory 82 may include removable or non-removable (or fixed) media, wher...

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Abstract

The application discloses an inverter control method and system. The inverter includes an electrically connected DCDC module and a DCAC module. The inverter control method includes: a system control parameter initialization step: cyclically detecting the startup of the DCDC module and the DCAC module Command; DCDC module soft start step: after detecting the start command of the DCDC module, soft start the DCDC module according to the DCDC module start process; DCAC module soft start step: the system detects the start of the DCAC module After the command, the DCAC module is soft-started according to the DCAC module startup process. The present invention does not require an additional hardware soft-start circuit, so that the front-stage DCDC and the rear-stage DCAC of the inverter with a two-stage topology structure can be soft-started respectively.

Description

technical field [0001] The invention belongs to the field of inverter control methods, and in particular relates to a two-stage topology auxiliary inverter control method and system. Background technique [0002] In the existing auxiliary inverters, in order to improve the power density of the equipment, a high-frequency isolation transformer scheme is widely used. The front stage adopts a high-frequency DCDC converter, and the rear stage adopts a three-phase inverter. A typical two-stage auxiliary inverter Inverter structure. [0003] In the existing literature or inventions, the research on the soft start of the two-stage inverter is less and not comprehensive enough. The soft start is explained; in the document "A Soft Start Circuit for DCDC", an additional hardware circuit is required to realize the soft start function; the patents "CN104796031A" and "CN1121090C" are all about the steady-state control of the inverter. The description of the method does not involve the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335H02M1/36H02M7/5387H02M7/5375
CPCH02M3/33569H02M1/36H02M7/5387H02M7/5375
Inventor 白旭峰朱洪庆李世霖陈敬东王海瑞
Owner CRRC QINGDAO SIFANG ROLLING STOCK RES INST