contravariant是什么意思

网络释义

用法例句

This paper analyses the rationale and the design of the inverting MAG welding machine using the peak current mode control.

分析了峰值电流控制模式的基本原理和设计需要解决的问题 ,研究了峰值电流型控制模式IGBT逆变MAG焊机的一些设计要点 ,包括斜坡电流的检测、波形处理、斜坡补偿、轻载问题的解决和过流保护电路的设

The principle of voltage soft-switch inverting, the method of measuring welding current by magnetic-loop and their advantages are discussed.

介绍了采用ＩＧＢＴ作为开关元件的弧焊逆变器，论述了电压软开关逆变原理、弧焊电流磁环检测方法以及其优点，介绍了电流调节器的应用。

The circuit is fit for the PWM rectifying and inverting situation at which the power should flow in two direction.

该电路特别适合于能量需双向流动的PWM整流和逆变场合。

Design of digital inverter for submerged arc welding;

数字化逆变埋弧焊电源的设计

Parameter design for main circuit of soft switch invert welding power source;

软开关逆变式弧焊电源主回路参数设计

A Review of the Application of Invert Technology to the Resistance Spot Welding;

逆变技术在电阻焊中应用研究

Improvement of the switch frequency and the material-decrease for spot welding inverter power;

提高逆变点焊电源开关频率与节材

Medelling and simulation of resistance spot welding inverter;

电阻焊逆变电源的simulink建模及仿真

MAG/CO_2 inverter welding power with complete remote control;

具有全遥控功能的逆变MAG/CO_2焊机

In order to improve the power parameter further,the intermediate frequency inversion of an electric voltage power type series resonance and frequency trace technique are adopted.

为使系统的功率因数较高,采用电压源型负载串联谐振中频逆变器和频率跟踪技术。

A new current control resistance welder with inversion is designed.

设计了一种新型的电流型控制的逆变点焊机。

In addition,the paper introduces the functions of inversion circuit and the working model of controlling and charging.

KA3525是PWM控制器件,利用其输出方波脉冲激励逆变器推挽电路的工作原理,使输出功率器件工作在开关状态,从而达到高效的目的。

independent inverter

无源逆变器，自励逆变器

Nielsen transformations and its inverse transformations of Schottky groups

Schottky群的Nielsen变换与逆变换

DC reversible variable speed motor

直流可逆变速电动机

load-commutated inverting circuit

负载换流式逆变电路

output voltage regulation of inverter

逆变电路输出电压调节

The frequency inverters has a function of variable voltage and variable frequency.

频率逆变器具有变压、变频功能。

The Design and Implement of the Reusable Inverter Quantizition and Inverter Transform Module in Video Decoder;

视频解码逆量化和逆变换的可重用IP设计研究

The Reverse and Normal Transformation of Martensite, Seasonal Crack of Brass, Cry of Zinc

马氏体逆变与顺变黄铜季裂与锌“哭”

Research on Isolated Boost Converter and Flyback Inverter;

隔离Boost变换器和反激逆变器的研究

Research on Inverter Based on Single-Stage Boost DC/DC Convertor;

单级Boost直流变换器型逆变器研究

Research on the DC/AC Link of the Modulariation Aviation Static Inverter;

模板化航空静止变流器逆变环节研究

Research of An Inverter Using DC/DC Converter Topology;

基于DC/DC变换器拓扑逆变器的研究

Simulation for Three-lever Inverter of Variable-frequency Speed Governing System

三电平逆变器变频调速系统的Matlab仿真

High-speed motor inverter using DC/DC converter

采用DC/DC升压变换高速电机逆变器

A NEW DEVELOPMENT OF INVERTER FOR ARC WELDING--POWER MOSFET INVERTER FOR ARC WELDING

弧焊逆变器的新发展——大功率场效应管弧焊逆变器

Multilevel Inverter Combination Topologies and Fault-tolerant Techniques in Multilevel Inverters;

新型多电平逆变器组合拓扑结构和多电平逆变器的容错技术

Comparison Study on Square-wave VSI and Two-step Level VSIs;

方波型电压源逆变器与二阶梯波电压源逆变器的比较研究(英文)

Inversion Algorithm of Multivariable Linear Time-Variable System and Its Reduced Inverse System;

多变量线性时变系统的求逆算法及降阶逆系统