Description

5SHY3545L0005  ABB  IGCT module

Functional Features:
High voltage and current tolerance: Capable of withstanding high voltages and currents, it can meet the requirements of high-power applications and is suitable for high-voltage direct current transmission, large motor drive, and other fields.
Low on-state voltage drop: During conduction, the voltage drop is low, resulting in low power consumption, which can effectively improve the efficiency of energy conversion, reduce energy loss, and minimize heat generation, thereby enhancing the overall performance of the system.
Fast switching speed: The switching speed is fast, capable of completing switching actions within microsecond levels or even shorter times, suitable for high-frequency applications, and can quickly respond to control signals to achieve precise power control.
High reliability: Utilizing advanced packaging technologies and manufacturing processes, it has strong anti-interference capabilities and can operate stably in complex industrial environments. It also incorporates protection mechanisms such as over-temperature, over-voltage, and short-circuit, further enhancing operational reliability.
Wide temperature range operation: It can operate stably within a temperature range of -40°C to +150°C, capable of adapting to applications in various environmental conditions.
Asymmetric characteristics: As an asymmetric IGCT module, its characteristics differ under forward and reverse voltages, particularly suitable for scenarios requiring rapid turn-off and withstanding high reverse voltages, such as welding equipment and pulse power applications.
Compact size and light weight: With a compact structural design, it has a small size and light weight, facilitating installation and integration, which can save equipment space and facilitate the miniaturization and lightweight design of the equipment.

Working Principle
Conduction Process: When the gate is applied with a positive strong voltage initially, the GCT is in the NNP transistor state at this time, and the transistor effect is greater than that of the thyristor. After entering the conduction state, the GCT can be approximated by two positive feedback transistors. The strong positive feedback causes both transistors to be saturated and conduct. When certain conditions are met, the IGCT completes the conduction process.
Cut-off Process: When a reverse voltage UGK is applied between the gate and cathode of the IGCT, the cut-off process begins. It includes three stages.
Storage Time Stage: After the gate is reverse-biased, UGK starts to extract excess stored minority carriers from the P and N base regions of the IGCT. When the minority carriers are basically extracted, J3 junction gradually blocks. This period is called the storage time. The storage time is related to the minority carrier lifetime, the width of the PN base region, and the current provided by the driving circuit. The larger the driving current, the shorter the storage time.
Voltage Establishment Stage: After J3 junction is cut off, the anode voltage of the IGCT begins to be rapidly established and rises. The IGCT gradually restores its blocking capability. Since the J3 junction of the IGCT has been cut off during the storage time, the current also immediately shifts from the cathode of the IGCT to the gate, and the current continues to flow through Q1’s emitter and collector, the gate of the IGCT, and the gate drive circuit. The larger the IGCT’s cut-off current, the longer the falling time, and a higher gate current rise rate can shorten the IGCT’s cut-off falling time.
Tail Time Stage: The remaining stored charges in the N base region and other areas cannot be extracted through the gate current but can only disappear through recombination. The transparent emitter enables electrons in the base region to pass through the transparent anode to the metal contact surface for recombination, providing a channel for the rapid outflow of carriers, shortening the cut-off time. Therefore, at the end of the IGCT cut-off process, the anode current always trails, and the corresponding time is called the tail time, which mainly depends on the manufacturing process of the device and is greatly affected by the driving parameters.
After the IGCT is cut off, the gate maintains a negative bias to ensure the reliable cutoff of the IGCT. In addition, the “gate commutation” and “hard drive” technology implemented by the integrated gate circuit of the IGCT enables it to instantly switch from conduction to blocking state. Compared with traditional GTO thyristors, it greatly improves the switching speed and reliability, and does not require a large amount of circuit to suppress the voltage rate of change.

Application fields

Power System: Can be used in HVDC converter stations to achieve efficient conversion of AC and DC electrical energy. Also applicable to reactive power compensation devices (SVC/SVG) in substations, helping to maintain grid voltage stability and improve power quality. Can also be used in circuit breaker control and other scenarios.
Industrial Drive: Often used in motor drive systems, such as soft starters and frequency converters for large motors, enabling precise speed regulation and control of the motor, suitable for applications like rolling mill drives, hoists, fans, and pump control, especially for those requiring rapid start, stop, and reversal.
Rail Transit: Suitable for electric locomotives, subways, etc., meeting the power transformation and control requirements during frequent starting and braking of these vehicles, providing reliable power support for the traction system of the vehicles.
New Energy Field: In wind power generation, it can be used in the converters of wind turbine generators to convert the electrical energy generated by the generator into a form suitable for grid connection. In photovoltaic power generation, it can be applied in the power conversion环节 of photovoltaic inverters and in battery energy storage systems (BESS)， achieving efficient storage and release control of electrical energy.
Welding Equipment： Can be used in welding power supplies， quickly establishing and interrupting welding current， precisely controlling the welding process， helping to improve welding quality and efficiency.
Pulse Power Application： Suitable for laser， particle accelerators， etc.， requiring rapid switching and withstanding high reverse voltage in pulse power applications， can be used to control the generation and transmission of pulses.