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Manufacturing Technology Insights | Thursday, July 28, 2022
The advanced approach enables power electronic systems to operate more efficiently and effectively by proactively responding to changing conditions.
FREMONT, CA: As the demand for improved energy efficiency and reduced energy losses rises, the focus on innovation in power electronic devices has become paramount in research and development. These devices support various applications, including data centres, electric vehicles, renewable energy systems, and industrial processes. Enhancing the effectiveness of power electronic devices potentially revolutionises how to produce, distribute, and utilise electrical power, leading to significant changes in the energy landscape.
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Wide bandgap (WBG) semiconductors, such as silicon carbide (SiC) and gallium nitride (GaN), find applications in advanced technologies. These materials offer improved electrical characteristics over traditional silicon-based semiconductors, enabling higher breakdown voltages, faster switching times, and lower on-state resistances. As a result, WBG semiconductors greatly enhance energy efficiency by reducing power losses during switching operations.
The progress of advanced switching technologies is a crucial aspect of innovation in power electronic equipment. Switches like metal-oxide-semiconductor field-effect transistors (MOSFETs) and insulated-gate bipolar transistors (IGBTs) are vital in controlling and converting electrical energy. The integration of soft-switching techniques, such as resonant converters and zero-voltage switching (ZVS), reduces switching losses and enhances overall efficiency by reducing the stress on switches during operation.
Efficient thermal management is essential to prevent higher losses and ensure the reliability of power electronic devices. Packaging technology advancements, such as using advanced materials, improved thermal interfaces, and innovative cooling methods like liquid cooling and microchannel heat sinks, have significantly enhanced heat dissipation and temperature control. As a result, power electronic equipment operates at higher power densities, leading to improved energy efficiency.
Integrating energy storage systems with power electronic devices opens up new possibilities for reducing energy losses. Combining batteries or supercapacitors with power converters can achieve energy buffering, load balancing, and regenerative braking capabilities. This integration allows the capture and utilisation of energy that would otherwise be lost, leading to improved overall energy efficiency and enhanced system performance.
The advancements in power electronics, marked by enhanced efficiency and reduced energy losses, are revolutionising energy production. These developments have far-reaching applications, including renewable energy integration, electric transportation, smart grids, and more. This field's ongoing research and development hold tremendous promise for a sustainable and energy-efficient future.
Advanced Packaging and Thermal Management
Effective heat dissipation and temperature control have become essential areas of innovation in power electronic devices, leading to the development of advanced packaging and thermal management techniques. Proper thermal management is critical to address the demand for reduced energy losses, ensure device reliability, and enhance overall energy efficiency, especially when power electronic devices operate at high power levels.
The significant advancement in packaging technology is using modern materials with enhanced thermal characteristics. Materials like advanced ceramics or metal matrix composites are examples of substances with excellent thermal conductivity, allowing them to efficiently transfer heat away from the active components of power electronic devices. By facilitating better heat dissipation, these materials reduce the risk of overheating and ensure optimal performance of the devices.
Digital Control and Power Management
Digital control and power management systems have brought about a revolution in the realm of power electronic equipment by offering precise control, adaptability, and improved energy efficiency. Leveraging digital controllers, advanced algorithms, and communication technologies, these developments have significantly enhanced power electronic systems' efficiency and power utilisation.
Digital control in power electronic systems involves the substitution of traditional analogue control circuits with digital signal processors (DSPs) or microcontrollers, a fundamental aspect of this advancement. Adopting digital control offers greater flexibility and programmability, enabling the implementation of complex control algorithms. The high-speed processing capabilities of digital controllers enable real-time monitoring and control of power electronic devices. As a result, power electronic systems accurately regulate voltage, current, and power transmission, leading to increased energy efficiency.
Sophisticated algorithms play a vital role in digital control and power management, and one such technique gaining popularity in power electronic systems is model predictive control (MPC). MPC utilises mathematical models and predictive algorithms to optimise control variables based on desired performance indicators and constraints. By anticipating future system behaviour and adjusting control actions accordingly, MPC achieves optimal power flow, reduces losses, and enhances energy conversion efficiency.
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