I. Introduction

Since the advent of thyristor in 1957, with the continuous development of semiconductor technology and application technology, it has played an increasingly important role in the field of electrical control. In the past, people could only use discrete devices to make devices in various electrical controls using thyristors. Due to the complex circuit, large volume, troublesome installation and debugging, and poor reliability, the application was greatly restricted. The thyristor intelligent module ITPM ​​(Intelli9ent Thyristor PowerModule) developed and produced by Zibo Linzi Yinhe High-Tech Development Co., Ltd. has fundamentally solved the above-mentioned difficulties and enabled the rapid expansion of the application of thyristors.

The so-called ITPM ​​is a new type of module that encapsulates the main circuit of the thyristor, the phase-shifting trigger circuit and the circuit with the control function in the same housing. The latest ITPM's phase-shifting trigger circuit is a fully digital circuit. The functional circuit is completed by a single-chip microcomputer. There are multiple current, voltage and temperature sensors built in. Various control lines can be led to the keyboard through the connector on the module to perform various functions. And electrical parameter setting, LED or LCD display can be carried out on. The current of each chip of the module has reached 1000A/voltage 1600V～2200V. The module is actually a quasi-power electronic device. It is very different from traditional devices in terms of volume, capacity, function, intelligence and reliability. Great advantage, especially convenient to install and use. There is no doubt that with this kind of device modular technology and products, major changes will occur in various electrical controls in the power distribution system in the future.

2. The scope of application of ITPM

A relatively complete ITPM ​​is generally composed of power thyristors, phase-shifting triggers, software-controlled single-chip microcomputers, current, voltage, temperature sensors, operating keyboards, LED or LCD displays and other parts. As shown in Figure 1:

figure 1

Figure 2 Speed transmission and current double closed loop speed regulation system composed of a single ITPM

It can be seen that, except for the limitation of power thyristor capacity, such ITPM is no longer comparable to ordinary traditional thyristor devices. It has a fairly high level of intelligence and adaptability. Therefore, it is widely used in electrical control in power distribution systems.

Flexible AC transmission FaCTS (F1esible ac Transmission System) uses ITPM to replace discrete semiconductor transmission switches, semiconductor current limiters, semiconductor circuit breakers, static var compensators, dynamic voltage resetters, static compensators, and active filters in power distribution systems , It is more convenient and meets the user's specified level of power.

In terms of AC and DC motor speed control, a single ITPM can become an irreversible double closed-loop DC speed governor, and two ITPMs can form a reversible four-phase speed governor with limited operation. as shown in picture 2:

ITPM is used in AC asynchronous cascade speed regulation and step-down speed regulation. An AC frequency conversion system composed of six ITPMs is very convenient, as shown in Figure 3-1 and Figure 3-2:

Figure 3-1 Cascade speed control system with double closed loop control

Figure 3-2 The double closed-loop control cascade speed regulation system can obtain a higher power low frequency variable frequency power supply.

has a wide range of applications in power supply and control, such as accelerator regulated power supply, as shown in Figure 4:

Figure 4 Accelerator regulated power supply

Figure 5 Energy-saving operation controller

The application of soft starter and energy-saving operation controller is shown in Figure 5:

Solid state contactors, relays, industrial electric heating temperature control, precision temperature control of various semi-body special equipment, medium and high frequency heat treatment power supplies, electric welding equipment (rectifier welding machine, secondary rectifier welding machine, inverter welding machine) laser power supply, Excitation power supply, electroplating, electrolysis power supply, mechanical and electronic equipment power supply, urban trackless, electric traction, port ship crane, fan, water pump, rail crane, gantry planer, large crane drive, ultra-low frequency molten steel, mixing power supply, papermaking, textile. Urban water supply, sewage treatment, etc., it can be said that the electrical control ITPM ​​in the power distribution system has an effect.

3. The application significance of ITPM

ITPM ​​is the concentrated embodiment of the digitalization, intelligence and modularization of power electronic products, which highly demonstrates the role of modern power electronic technology in electrical control. ITPM can be used not only in more complicated control situations, but also in general switch control situations, which is its major advantage. Due to its high switching speed and arc-free shutdown and other excellent characteristics, this will improve the quality and performance of the control. Greatly improved. The extensive and large-scale application of ITPM ​​saves a lot of metal materials and greatly reduces the volume of its control system. It can also make very complicated multiple electrical control systems very simple. Centralized computer control is used to realize information management, and operation and maintenance costs are very low. The energy saving effect of ITPM ​​is very obvious, which is of great significance to environmental protection.

Fourth, concluding remarks

The series of ITPM ​​developed and produced by Linzi Yinhe High-Tech Development Co., Ltd. has been widely used due to its superior performance and has shown obvious social and economic benefits. It is a substitute product for traditional thyristor devices. With a wide range of applications and a broad market, it is a very ideal new generation of electrical control products. With the low-cost and large-scale entry of ITPM ​​into the market, traditional electrical control products and technologies will undergo tremendous changes and enter a new era of electrical control of power electronics.