DC Power Supply Solutions for Modern Applications: Features, Functions, and Use Cases

 

Understanding the Role of DC Power Supplies in Modern Applications

DC power supplies provide a regulated DC output to power a component, a module, or a device. A power supply must deliver voltage and current that is stable and precise, with minimal noise to any type of load: resistive, inductive, low impedance, high impedance, steady-state, or variable. How well the power supply fulfills this mission and where it reaches its limits are defined in its specifications. These characteristics make DC power supplies indispensable across a wide range of technological applications. The following are key examples that highlight their critical roles:

1. Precise Testing Solution for IGBT: ADG+ series High-Power Programmable DC Power Supply

IGBT testing is critical due to the component's extensive use across various applications. Preen’s ADG+ series provides robust solutions, ensuring customers can meet their testing requirements with precision and reliability. One of the test requirement is to verify if the IGBT’s nominal values meet specifications under 15V and 0-1200A conditions. Using the ADG+ series in CC mode, users can simulate a short-circuit with the IGBT. With a capacity of up to 2000V and 0-2500A, the ADG+ series meets these requirements effectively.

2. Auxiliary Inverter Testing Solutions

The auxiliary inverter stands as an indispensable component in railway transportation systems. The control unit of the auxiliary inverter must comply with the testing standards outlined in IEC 60571:2006 (GB/T 25119-2021). The equipment must maintain normal operation under various supplied voltage conditions. To meet testing requirements, Preen’s ADG-L series Programmable DC Power Supply can simulate the input terminals of auxiliary inverters, and comply with the regulations of GB/T 34575-2023.

3. DC EV Charging Connector Testing Solution

There are multiple charging standards available in the market, including SAE J1772, GB/T 20234, IEC 62196, and CHAdeMO, among others. Preen’s EV Charging Connector Test System integrates the ADG+ high-power programmable DC power supplies, temperature data loggers, industrial HMI computers, inkjet printers, PDU cabinet sockets, and our exclusive Preen Program software. The system is capable of conducting temperature rise tests and aging tests on multiple DC EV Charging Connectors simultaneously.

4. Solar Array IV Curve Simulation Solutions

Nowadays, the rapid growth of solar panels and PV inverters has led to more demands on higher current, voltage, and power testings. Preen’s programmable DC sources have up to 2000V and 5kW to 2000kW high power output with solar array IV curve simulation function that is suitable for PV inverter testing. Preen rolls out a new function on the latest programmable DC power supply: solar array IV curve simulation, which has built-in dynamic MPPT test profile of EN50530 and Sandia and can monitor the MPPT status for the PV inverters.

Preen is committed to helping you select the ideal programmable DC power supply for your specific application needs.

 

Key Features of DC Power Supplies

1. High Precision and Stability for Advanced Applications

Preen's DC power supplies deliver exceptional voltage and current stability, ensuring precise performance even under dynamic load conditions. For instance, the ADG-L series utilizes PWM technology to achieve low ripple (＜0.05%) and fast response times (≤5ms), making it ideal for applications such as photovoltaic testing, electric vehicle R&D, and battery simulation. Similarly, the ADG+ series offers high accuracy (≤0.1%) and low ripple (≤0.05%), catering to high-power testing scenarios like EV motors and energy storage systems.

2. Versatility Across Industries and Applications

With a wide range of models and configurations, Preen's DC power supplies are designed to meet diverse industry needs. The ADG-L series offers 19 models with output power ranging from 5kW to 15kW, suitable for applications in renewable energy, transportation, and industrial automation. The ADG+ series supports output power up to 300kW per unit and can be paralleled up to 1800kW, providing flexibility for large-scale testing environments. The ADC series, with its compact rack-mount design, is ideal for production lines, burn-in tests, and laboratory settings, offering output voltages from 0-30V to 0-600V.

3. Advanced Monitoring and Control l Features

Preen's DC power supplies are equipped with intuitive interfaces and comprehensive control options. The ADG-L series features a 5-inch touch screen and rotary knob for easy operation, along with remote sensing capabilities to compensate for voltage drops. The ADG+ series includes a 7-inch touch screen and supports solar array simulation with built-in EN50530 mathematical formulas, enabling precise testing of photovoltaic inverters. Additionally, all series offer multiple communication interfaces such as RS-232, RS-485, USB, Ethernet, and optional GPIB, facilitating seamless integration into automated test systems.

How to Choose the Right DC Power Supply for Your Needs?

Selecting the right programmable DC power supply is critical for achieving accurate results, maximizing efficiency, and protecting your equipment. Preen offers a diverse lineup of high-performance DC power supplies to meet a variety of testing and operational needs. Here's how to choose the best model for your application:

1. Identify Your Application and Test Scenario

Understanding your specific use case helps narrow down product options:

• For high-power R&D and industrial testing → choose the ADG+ Series, which offers up to 2000kW (parallel) and 2000V.
• For mid-range, high-efficiency testing needs → the ADG-L Series provides 5kW–15kW models with fast response and low ripple.
• For compact setups or automated production lines → the ADC Series offers 2U/3U high-density units ideal for system integration.

2. Match Voltage, Current, and Power Output to Your Requirements

Preen covers a broad voltage and power range:

• ADG+ Series: 0–2000V, up to 2000kW (parallel)
• ADG-L Series: 0–2000V, up to 15kW per unit
• ADC Series: 0–600V, up to 4kW per unit

Use Preen’s power calculator or contact support for configuration guidance.

3. Check for Required Control Interfaces and Features

All Preen DC power supplies support a variety of communication protocols:

• RS-232, RS-485, USB, Ethernet, and optional GPIB
• Support for SCPI commands for easy integration into automated test systems
• Built-in touch screen UIs for user-friendly local control (5” for ADG-L, 7” for ADG+)

4. Consider Specialized Testing Functions

If your application involves:

• PV inverter testing → ADG+ with Solar Array IV Curve Simulation
• EV connector aging/temperature rise tests → ADG+ paired with Preen's EV Charging Connector Test System
• Auxiliary inverter testing for railway systems → ADG-L compliant with GB/T 34575-2023

5. Factor in System Scalability and Space Constraints

• Need rack-mounted, space-saving solutions? → ADC Series
• Need future expansion or high-power scaling? → ADG+ with parallel configuration up to 1.8MW
• All models feature remote sensing and multi-protection (OVP, OCP, OTP) for reliability and safety.

Not Sure Where to Start? Let Preen help you find the right DC power supply for your needs. From compact models to high-power systems, our solutions are trusted worldwide.

Supporting EV Testing Solutions with Precision Power

1. Technical Demands of EV Testing for DC Power Supplies

Electric vehicle (EV) testing requires highly accurate, stable, and programmable DC power supplies to simulate real-world charging and driving conditions. Key requirements include precise voltage and current control, fast transient response, low ripple, and the ability to simulate various load profiles. These features are essential for component validation, battery charging tests, motor drive simulations, and EV charging connector durability assessments. The ability to run automated test sequences and integrate with data acquisition systems is also crucial for improving testing efficiency and repeatability.

2. Preen’s Proven Applications in EV Testing

Preen delivers advanced DC power solutions tailored to EV applications. For example, the ADG+ High-Power Programmable DC Power Supply is widely used in EV charging connector testing, where it performs temperature rise and aging tests in compliance with standards such as SAE J1772, GB/T 20234, IEC 62196, and CHAdeMO. Integrated with Preen’s custom software and test systems, the ADG+ ensures consistent, high-precision output across multiple channels simultaneously.

Additionally, the ADG-L Series has been successfully implemented in electric vehicle subsystem testing, such as onboard chargers (OBCs) and DC-DC converters. Its ability to provide stable and programmable DC output allows engineers to simulate various voltage conditions during dynamic load changes, ensuring components meet automotive testing standards and performance benchmarks. These practical applications highlight Preen’s dedication to delivering flexible, standards-compliant, and future-ready DC power solutions for the fast-growing EV industry.

Optimizing Energy Storage Systems with Reliable Power Solution

1. Power Requirements for Energy Storage Systems: Stability and Efficiency Matter

Energy storage systems (ESS) demand high-performance DC power supplies that offer stable output, high efficiency, and fast response times. Whether for battery cycling, performance evaluation, or system integration, the power supply must handle fluctuating loads, regenerative conditions, and precise voltage/current control. Any instability in power delivery can impact energy conversion accuracy, shorten battery life, or cause test inconsistencies. Therefore, reliable power supplies are critical to maximizing system performance and ensuring long-term energy storage efficiency.

2. Real-World Success with Preen’s Solutions

Preen’s ADG+ High Power Programmable DC Power Supply has been widely adopted in energy storage system testing, especially for lithium-ion battery simulation and inverter validation. With output up to 2000V and 2000kW (parallelable), the ADG+ series supports high-current charging/discharging scenarios with low ripple and fast transient response. In one real-world project, a major ESS integrator used ADG+ units to simulate battery banks and test hybrid power control systems, significantly reducing setup time and improving test accuracy. This showcases Preen’s ability to deliver powerful, scalable, and application-ready solutions for the growing energy storage market.

Applications in Aerospace, Defense, and Communications

1. Advantages of Preen DC Power in High-Demand Industries

In industries such as aerospace, defense, and communications, the reliability of power sources is paramount. Preen’s DC power supplies are designed to meet the rigorous demands of these sectors, offering precise, stable, and efficient power delivery for a wide range of applications, including satellite testing, radar systems, avionics, and secure communications. These industries require equipment that operates in extreme conditions and delivers consistent performance under variable load. Preen’s solutions support complex simulations, hardware testing, and long-duration operations, all while ensuring that sensitive equipment remains safe and functional throughout the process.

2. High Stability, Durability, and Industry Compliance

Preen’s DC power supplies are built for high stability and durability to withstand the harsh environments typical of aerospace and defense applications. With low ripple, fast transient response, and precision voltage control, these power supplies ensure the integrity of testing and system operations. Additionally, Preen’s products are fully compliant with international industry standards, including MIL-STD (for defense applications) and ISO and IEC standards for aerospace and communications. This guarantees that Preen’s solutions not only meet but exceed the performance expectations for critical systems in these high-demand industries.

Why Preen Stands Out: Key Advantages of Our DC Power Supplies

1. Global Reach and Technical Support

Preen’s commitment to providing exceptional power solutions is backed by its extensive global presence and dedicated technical support teams. With a strong network of sales, service centers, and partners around the world, Preen ensures that customers receive personalized support, quick product delivery, and reliable post-purchase assistance. Our engineering experts are available to help with system design, troubleshooting, and customization, ensuring that our DC power supplies seamlessly integrate into your projects and operations.

2. Quality Certifications: Proof of Reliability and Environmental Compliance

Preen’s DC power supplies are certified to meet the highest international standards, ensuring both product reliability and environmental sustainability. Our products are CE and RoHS certified, demonstrating compliance with European safety and environmental regulations. Additionally, Preen operates under the stringent guidelines of ISO 9001:2015, a global standard for quality management systems. These certifications guarantee that Preen’s power supplies meet the most demanding technical requirements while supporting eco-friendly practices and maintaining high manufacturing standards to suit a variety of applications.

Conclusion: Achieve More with Preen’s Programmable Power Supplies.

Preen’s programmable DC power supplies are designed to address the most pressing challenges across a variety of industries, including precision power delivery, reliable performance, and easy integration. Whether you're testing electric vehicles, optimizing energy storage systems, or working in high-demand sectors like aerospace and defense, Preen ensures that your systems operate at their best with stable and efficient power solutions.

By choosing Preen, you gain access to industry-leading technology, global support, and certified quality, empowering you to tackle complex testing and operational demands with confidence. We are committed to driving innovation and excellence, ensuring your success in every project.

Ready to take your operations to the next level?
Contact Preen today to learn more about how our products can help you achieve your goals with precision, reliability, and unmatched performance.