Advanced Silicon Controlled Rectifier Accessories for Electroplating and

Product Specification

Equipment Description:

1. Equipment Overview
Silicon Controlled Rectifier (SCR) is an energy conversion device with thyristor as the core power device and intelligent digital control circuit, which can efficiently convert alternating current (AC) into controllable direct current (DC). Its characteristics include high efficiency, no mechanical wear, fast response speed, small size, and it is widely used in voltage regulation, rectification, inversion and automation control.

2. Core Functions
Controlled Rectification: Accurately control the output DC voltage/current by adjusting the control pole trigger signal.
Voltage Regulation and Inversion: Supports bidirectional control of electric energy, suitable for electroplating, electrolysis, induction heating and other processes.
Energy-saving characteristics: Compared with traditional rectification technology, the utilization rate of electric energy is significantly improved, which helps industrial energy saving.

3. Technical Parameters

4. Application areas

Electroplating/electrolysis: Provide stable DC power supply to ensure uniformity of coating.

Industrial heating: Cooperate with induction coil to realize metal smelting and heat treatment.

Arc welding equipment: Adaptively control arc stability to reduce welding spatter.

New energy system: Power regulation of photovoltaic inverter and energy storage system.

V. Installation and operation precautions

Wiring specification: Anode is connected to the positive pole of power supply, cathode is connected to the load, and the control pole signal needs to match the trigger voltage.

Heat dissipation maintenance: Clean the radiator regularly to avoid damage to the device caused by overheating.

Safety protection: Wear insulating equipment during operation, and prohibit direct short circuit at the load end.

Main structures and components:

1. Core power devices

Structure of thyristor (SCR): It is composed of four layers of semiconductor materials (PNPN), forming three PN junctions, leading to three electrodes of anode (A), cathode (K), and control electrode (G).

Packaging form: It is divided into bolt type and flat type to adapt to different heat dissipation and installation scenarios.

Type: Unidirectional thyristor: It is only unidirectional and consists of a PNPN four-layer structure.

Triac: It is bidirectional and equivalent to two unidirectional thyristors in reverse parallel. The structure is NPNPN five layers, containing four PN junctions.

2. Main circuit topology

Three-phase bridge rectifier circuit: It reduces the ripple factor of the output voltage (≤1%) through multi-phase rectification, which is suitable for high-power scenarios.

Double reverse star with balanced reactor circuit: Balance current distribution and improve power conversion efficiency.

3. Control module‌
‌Intelligent digital control circuit‌: integrated multi-loop control (voltage loop, current loop), realizes voltage stabilization, current stabilization (accuracy better than 1%) and soft start function (adjustable from 0 to 60 seconds).
‌Trigger and maintenance circuit‌: the trigger signal is applied through the control electrode (G) to control the conduction, and the main circuit maintains the on state after conduction.

4. Auxiliary system‌
‌Cooling system‌: adopt air cooling, water cooling or self-cooling design to ensure temperature stability under high-power operation.
‌Protection mechanism‌: integrated overvoltage, overcurrent, short circuit and other protection functions to prevent device damage.
‌Filter circuit‌: capacitors and inductors are configured at the input/output ends to suppress high-frequency interference and ripple.

5. External connection and operation‌
‌Wiring specification‌: the anode (A) is connected to the positive pole of the power supply, the cathode (K) is connected to the load, and the control electrode (G) needs to match the trigger voltage.
The bidirectional thyristor has no clear polarity distinction, and bidirectional conduction is achieved through the control electrode signal.
‌Installation requirements‌: Avoid clogging the heat sink and ensure that the terminal connection is tight‌.

6. Application Adaptation Structure‌
‌Electroplating/electrolysis scenario‌: Use a multi-phase rectifier circuit to output low-ripple DC power to ensure uniformity of the coating‌.
‌Voltage regulation and inverter scenario‌: Bidirectional thyristor (TRIAC) supports AC contactless switching function and simplifies the control circuit‌.

Features:

1.High cost performance: Based on the customer's product positioning and development strategy, and with economic affordability as the foundation, we achieve the best cost performance.
2.The advanced and meticulous design concept of the equipment, along with the highly automated industrial equipment, showcases the image of a modern and advanced enterprise.
3. It has high adaptability, meeting the current production requirements and reserving room for development, taking into account the needs of increased production and improved quality in the future.
4.Quality compliance strictly adheres to the ISO900 quality management system, with every minute detail of the entire equipment installation being strictly controlled.