600kwIGBT串联谐振式节能中频电炉主电路的设计

600kwIGBT串联谐振式节能中频电炉主电路的

设计

就目前来讲，中频感应加热的加热速度快同时操纵起来十分方便，差不多在诸多行业中得到了广泛的应用。本文对600kwIGBT串联谐振式节能中频电炉主电路系统进行了设计，要紧工作如下：

一．高压10kV进线开关柜的设计，高压10kV系统为小电流接地系统，设计过电压和过电流爱护，设计电压、电流和电能计量。

二．设计整流电路、滤波电路以及逆变电路，讲明其原理。

三．讲明元件工作原理和电路设计原理及依据，讲明降低谐波和节能原理。

本设计阐述了串联谐振中频感应电炉的主电路整体结构，同时给予了差不多电路的理论分析，推导了主电路的运算公式，阐述了通过整流桥和谐振负载改造后优点，完成了逆变电路、整流电路以及电抗器的设计。目前为止，串联谐振中频电炉仍具有大量的使用空间，使得该课题具有其现实意义。

关键词：感应加热；串联谐振；晶闸管；逆变；整流

For now, the rate of heating of the medium frequency induction heat ing, fast and control is very convenient, has been widely used in many i ndustries. This article 600KwIGBT series resonant energy-saving intermedi ate frequency electric furnace main circuit system design, the main work is as follows:

One. The design of high voltage 10KV line switchgear, high voltage 10KV system for small current grounding system, the design of overvolt age and overcurrent protection, design voltage, current and power measure ment.

Two. The design phase into the 10KV six line rectifier transformer wiring, selection of the rated voltage and the voltage drop, low pressure outlet overvoltage and overcurrent protection, indicating that reducing the harmonic principle.

Thire. Description of the components working principle and circuit d esign principles and basis of the lower harmonics and energy conservation principle.

The design described the overall structure of the main circuit, the ser ies resonant medium frequency induction furnace and give a theoretical a nalysis of the basic circuit, the main circuit is derived formula on the ad vantages of the transformation after the bridge rectifier and the resonant l oad inverter circuit is completed, design of the rectifier circuit, reactor, an d the line inductance. So far, the series resonant intermediate frequency e lectric furnace still has a lot of use of space, the subject has its practical significance.

Keywords: induction heating; series resonance; thyristor, inverter;rectif ier

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Abstract II

目录III

第一章概论- 1 -

1.1 选择课题的背景及意义 - 1 -

1.2 串联谐振中频电炉主电路结构的设计 - 2 -1.3 该课题的研究目标- 2 -

第二章中频电炉的工作原理- 4 -

2.1 中频电炉的内部结构- 4 -

2.2 电磁感应原理- 4 -

2.3 感应加热效应- 5 -

2.3.1集肤效应- 5 -

2.3.2邻近效应- 6 -

2.3.3端部效应- 6 -

2.3.4圆环效应- 7 -

2.4 中频电炉负载- 7 -

2.4.1负载磁场- 7 -

2.4.2负载电阻- 8 -

2.4.3负载参数- 9 -

第三章中频电源和小电流接地系统- 13 -3.1 中频电源系统- 13 -

3.2 小电流接地系统 - 14 -

3.2.1 10kV进线开关柜的选择- 15 -

3.2.2 电压、电流和电能计量- 16 -

3.2.3 10kV线路过电压和过电流爱护- 17 -第四章整流电路- 19 -

4.1 中频电源整流电路的条件- 19 -

4.2 整流电路原理分析 - 20 -