Industrial Power Supply

Industrial Power Supply Application

Description

Reliable AC-DC conversion solution for industrial power supplies with high power factor correction (PFC), low harmonic distortion, and high efficiency. Our power supply solution features Semikron thyristor modules, diode bridges, and IGBT modules optimized for telecom, industrial, and electroplating power supplies. The solution supports power ratings from 1kW to 100kW with output voltages from 12VDC to 400VDC.

Core Advantages

High Power Factor (>0.95) Active PFC using IGBT modules achieves power factor >0.95 and THD <5%, meeting IEC 61000-3-2 requirements

Wide Power Range (1-100kW) Scalable solution from 1kW to 100kW using thyristors, diodes, or IGBT-based active front-end

Adjustable Output Voltage Thyristor-controlled rectifiers enable 0-100% voltage adjustment for flexible operation

High Reliability Industrial-grade components with MTBF >50,000 hours and 20+ year design lifetime

Multiple Topology Options Choose from diode rectifiers, thyristor controllers, or active PFC based on requirements

Comprehensive Protection Built-in overcurrent, overvoltage, overtemperature, and short-circuit protection

Recommended Bill of Materials (BOM)

Item	Part Number	Description	Quantity	Datasheet
1	SKKH570/16E	Thyristor Module, 1600V, 570A, phase-controlled rectifier	3	📄 Download
2	SKKD162/16	Rectifier Diode Bridge, 1600V, 162A	1	📄 Download
3	SKM100GB12T4	IGBT Module, 1200V, 100A, for active PFC	3	📄 Download

Applications

Telecom Power Supplies (48V DC)

Electroplating Rectifiers

Battery Charging Systems

Welding Power Supplies

Industrial DC Power Systems

UPS Battery Chargers

Electrochemical Processing

Technical Specifications

input Voltage

230-690VAC 3-phase ±20%

input Frequency

50/60Hz

output Voltage

12-400VDC (adjustable)

output Power

1-100kW

efficiency

Up to 96% (with active PFC)

power Factor

>0.95 (with active PFC)

thd

<5% (with active PFC)

operating Temp

-20°C to +70°C

protection

Overcurrent, Overvoltage, Overtemperature, Short-circuit

Customer Success Stories

Electroplating Equipment Manufacturer

Electroplating Equipment | High-Power DC Electroplating Rectifier

Challenge

Required development of 5000A/12V high-power electroplating rectifier with adjustable output voltage, low ripple (<3%), high reliability, and 24-hour continuous operation capability.

Solution

Adopted SKKH570/16E thyristors to form three-phase fully controlled rectifier bridge, achieving 0-100% voltage adjustment. Combined with large capacity filter inductors (3mH) and capacitors (100,000μF) to control output ripple within 3%. Optimized thermal design with water cooling heatsinks maintaining case temperature <80°C.

Results

Output voltage stability ±1%, ripple <3%, efficiency >92%. System MTBF exceeded 30,000 hours. Equipment has been stably operating for 3 years with minimal maintenance, customer very satisfied with performance and reliability.

"Semikron thyristors' high reliability ensures our equipment's continuous stable operation in harsh electroplating environments"

Telecom Power Supply Manufacturer

Telecom Power | 48V Telecom Switching Power Supply with Active PFC

Challenge

Developed 10kW/48V telecom power supply requiring power factor >0.95, efficiency >95%, meeting N+1 redundancy configuration, with limited volume and high reliability for telecom-grade applications.

Solution

Front stage adopted SKM100GB12T4 to build three-phase active PFC using VIENNA topology, achieving 0.98 power factor. Rear stage adopted full-bridge LLC resonant converter at 100kHz to reduce magnetic component volume. Rectifier output adopted SKKD162/16 three-phase bridge for redundancy.

Results

Power factor 0.98, efficiency 96.5%, power density reached 15W/in³. Passed Telcordia SR-332 reliability certification with MTBF >100,000 hours. Meeting telecom-grade application requirements with excellent field performance.

"Semikron IGBT's low loss characteristics allow our power supply efficiency to reach industry-leading levels while maintaining compact size"

FAE Expert Insights

John Wang

Senior FAE - Power Supply Systems

14+ years

Professional Insights

Based on extensive experience supporting customers with industrial power supply designs, this solution addresses critical challenges through proven architecture and component selection. The implementation achieves optimal balance between performance, reliability, and cost-effectiveness. Our field experience shows that proper implementation delivers significant improvements in efficiency and reliability. I recommend working closely with our FAE team during the design phase to optimize component selection, thermal management, and control strategy for your specific requirements. Contact us for reference designs, thermal simulation support, and detailed technical guidance.

Key Takeaways

SKKH570/16E is the best choice for applications requiring voltage adjustment up to 570A
SKKD162/16 is ideal for cost-sensitive fixed voltage applications up to 162A
Active PFC with SKM100GB12T4 achieves >0.98 power factor and <5% THD
Thermal design must consider worst-case conditions and aging factors
Industrial power supplies must meet IEC 61000-3-2 harmonic standards

Decision Framework

Power Supply Topology Selection Framework

Steps:

Evaluate voltage adjustment requirements
Determine power level and input voltage
Assess efficiency and power quality requirements
Consider cost constraints and volume limitations
Consult FAE for optimized component selection

Ready to Implement This Solution?

Contact our FAE team for design support and quotes

Frequently Asked Questions

How do I choose between thyristor, diode, and IGBT-based rectifiers?

The choice depends on your application requirements: Diode Rectifiers (SKKD series) - Best for cost-sensitive applications with fixed output voltage. Simple, reliable, and lowest cost. No voltage adjustment capability. Ideal for battery chargers and basic power supplies. Thyristor Rectifiers (SKKH series) - Use when adjustable output voltage (0-100%) is required. Enables soft-start to limit inrush current. Good for electroplating, motor drives, and applications needing voltage control. IGBT Active Front-End - Choose for high power factor (>0.95), low THD (<5%), and regenerative capability. Required for applications >50kW or where power quality is critical. Higher cost but best performance. Contact our FAE team for detailed topology selection guidance based on your specific requirements.

Contact our FAE team for topology selection assistance based on your power level and performance requirements.

What are the key design considerations for high-power electroplating rectifiers?

High-power electroplating rectifier design requires attention to: Current Rating - Size components for continuous operation at rated current with 30% margin. SKKH570/16E (570A) is popular for 500A rectifiers. Voltage Control - Use phase-controlled thyristors for smooth 0-100% voltage adjustment. Implement ramp-up to avoid current surges. Ripple Reduction - Add output inductors (1-5mH) and capacitors to achieve <5% ripple for quality plating. Thermal Management - Water cooling is often required for >10kW. Ensure case temperature <85°C. Protection - Implement fast-acting fuses, overcurrent protection, and ground fault detection. Control Interface - Provide remote voltage/current programming and monitoring. Our reference design for 5000A/12V electroplating rectifiers using SKKH570/16E achieves <3% ripple and >92% efficiency.

Request our electroplating rectifier reference design for detailed implementation guidance.

How do I implement active PFC for high-power industrial power supplies?

Active PFC implementation using Semikron IGBTs: Topology - Use three-phase VIENNA rectifier or 6-switch PWM rectifier for >10kW applications. IGBT Selection - SKM100GB12T4 is ideal for 10-30kW PFC stages. For higher power, use SKM200GB12T4 or parallel modules. Control Strategy - Use average current mode control with voltage and current loops. Switch at 10-20kHz for good dynamic response. Gate Drive - Use SKYPER32PRO with proper dead-time (2-3μs) and protection. Input Filter - Add differential and common-mode filters to meet EMI requirements. Target Performance - Power factor >0.98, THD <5%, efficiency >95%. Our reference design achieves 0.98 PF and <4% THD at 20kW using SKM100GB12T4 modules.

Contact our FAE team for PFC reference designs and control algorithm support.

What thermal management is required for high-power rectifiers?

Thermal management is critical for reliable operation: Losses Calculation - Diode rectifiers: ~1-2% losses

Thyristor rectifiers: ~1.5-2.5% losses

IGBT active PFC: ~3-5% losses. Heatsink Selection - Natural convection: up to 5kW

Forced air: 5-50kW

Liquid cooling: >50kW. Target case temperature <85°C. Thermal Interface - Use high-conductivity TIM (>3 W/mK). Apply proper mounting torque (3-5 Nm for M6). Water Cooling - For electroplating rectifiers >10kW, use deionized water at 5-10 L/min flow rate. Temperature Monitoring - Use integrated NTC sensors and implement overtemperature protection at 125°C junction. Redundancy - For critical applications, consider N+1 configuration. Our thermal simulation tools can help optimize your cooling system design.

Use our thermal design service for optimized heatsink and cooling system selection.

What are the benefits of using Semikron thyristor modules in industrial power supplies?

Semikron thyristor modules (SKKH series) offer significant advantages: High Current Capability - SKKH570/16E handles 570A continuous with 12,000A surge capability. Voltage Range - Available from 1200V to 2200V ratings to match application requirements. Phase Control - Enable smooth voltage adjustment from 0-100% with simple control circuits. Soft-Start - Limit inrush current to <200% rated, protecting transformers and components. Reliability - Industrial-grade design with MTBF >100,000 hours. Standardized Package - Compatible mounting with other Semikron modules for design flexibility. Protection - High dv/dt and di/dt capability with built-in snubber networks. Applications - Proven in electroplating, motor soft-starters, battery chargers, and welding equipment worldwide. BeiLuo provides comprehensive application support including gate drive design and protection circuit recommendations.

Contact our FAE team for thyristor module selection and phase control circuit design support.