An Active Clamp Dual Three-Level Frequency Converter and Its Loss Balance Modulation Algorithm
A three-level frequency converter and three-level inverter technology are applied in electrical components, conversion devices for converting AC power input to DC power output, and output power, etc., which can solve problems such as unbalanced loss of power devices and reduce Harmonic distortion rate, low loss, effect of reducing loss
Inactive Publication Date: 2017-09-26
CHINA UNIV OF MINING & TECH
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The purpose of the present invention is to provide an active clamp dual three-level inverter and its loss balance modulation algorithm, to solve the technical problem of unbalanced power device loss during the operation of the inverter, to improve the voltage utilization rate and reduce the voltage Harmonic distortion rate of current
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0018] An embodiment of the present invention will be further described below in conjunction with the accompanying drawings;
[0019] figure 1 It is a system structure diagram of the active clamp dual three-level inverter of the present invention, the inverter includes a pre-charging circuit, an active clamp three-level rectifier circuit, a capacitor filter circuit, an active clamp three-level inverter circuit, 36-channel pulse drive circuit and DSP+FPGA control board; the active clamp three-level rectifier circuit, capacitor filter circuit and active clamp three-level inverter circuit are connected by stacked busbars, and the pre-charging circuit is connected with The front end of the source clamping three-level rectifier circuit, the controller includes a digital signal processor DSP and a field programmable gate array FPGA, wherein the digital signal processor DSP and the field programmable gate array FPGA communicate through the bus to generate 36 control pulse signals, T...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
An active-clamp double-three-level frequency converter and its loss-balanced modulation algorithm belong to medium and high voltage frequency converters and modulation algorithms. The inverter includes a pre-charging circuit, an active clamp three-level rectifier circuit, a capacitor filter circuit, an active clamp three-level inverter circuit, a 36-channel pulse drive circuit and a control board; the active clamp three-level rectifier The current circuit, capacitor filter circuit and active clamp three-level inverter circuit are connected by laminated busbars. The pre-charging circuit is at the front end of the active clamp three-level rectifier circuit. The controller communicates with the active The clamped three-level rectification circuit is connected with the active clamped three-level inverter circuit. The present invention optimizes selection of the redundant zero state of the active-clamp three-level frequency converter, adopts an improved seven-segment space vector modulation, and reduces the loss of two power devices inside each phase bridge arm, thereby improving the voltage utilization rate of the frequency converter and load capacity, reduce the harmonic distortion rate of voltage and current, and provide a practical medium and high voltage inverter.
Description
technical field [0001] The invention relates to a medium-high voltage frequency converter and a modulation algorithm, in particular to an active-clamp double-three-level frequency converter and a loss-balance modulation algorithm thereof. Background technique [0002] Energy shortage and environmental pollution are common worldwide problems faced by mankind. my country's energy is relatively poor and the energy utilization rate is low, and the economic growth is extensive. The effective use of energy is very urgent in our country. In the "Eleventh Five-Year Plan", my country puts forward the idea of establishing a resource-saving and environment-friendly society, developing a circular economy, and realizing sustainable development. NPC three-level inverters are widely used in medium-voltage applications in industry, marine, mining and traction, but there is an essential shortcoming that has not been overcome so far. The unbalanced loss of the device limits the capacity o...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/487
Inventor 公铮戴鹏张海军王江彬王瀚哲陈想崔琪张婉韩钟辉
Owner CHINA UNIV OF MINING & TECH