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
| Item | Parameter Description |
| Input voltage | AC 220V/380V (single phase/three phase) |
| Output voltage | DC 0-600V (adjustable) |
| Output current | DC 0-3000A (depending on model) |
| Conversion efficiency | ≥90% |
| Ripple factor | ≤1% |
| Protection level | IP20-IP54 (depending on scenario) |
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.
