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Manufacturing Technology Insights | Friday, November 17, 2023
Power electronics enable efficient electrical power management in transportation, renewables, consumer electronics, and industry, driving innovation and sustainability in various applications.
FREMONT, CA: Power electronics' pervasive influence extends across diverse domains, exhibiting continuous growth, particularly in light of current technological advancements, and integrated designs of power semiconductor components and controllers. The field encompasses the manipulation of electric power for various purposes, offering a broad spectrum of applications spanning from small-scale power consumption to the generation of megawatts. Streamlined manufacturing processes have further expanded the accessibility of these devices, encompassing a wide range of power ratings, and progressively, they have extended into the realm of high-voltage applications.
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Power electronics components and systems enable various stakeholders to create energy-efficient power electronic systems, thereby playing a crucial role in decreasing worldwide energy usage and emissions. An estimated 15 billion kilowatts per hour of power, equivalent to over 85 per cent of the generated power, undergoes conversion or processing through various power electronic devices.
Applications of Power Electronics
The applications of power electronics encompass a wide spectrum, spanning from everyday household electronics to space-related uses, where the consistent and precise delivery of electrical power is essential. It is crucial to emphasise that power supply plays a key role in transforming and controlling power in various applications, all by the principles of energy conservation.
E-mobility: The most rapidly advancing technologies in use at fast-charging stations and within vehicles, at the junction between the battery and the motor, involves wide band gap semiconductors. Currently, the power electronics in vehicles predominantly rely on silicon-based semiconductors, which have a maximum capacity to endure high temperatures. The utilisation of wide band gap semiconductors offers the potential to reduce system costs by diminishing the need for intricate thermal management systems while facilitating power flow regulation in vehicles.
Transformers: Transformers are categorised into two main types, step-up transformers and step-down transformers, each of which plays a crucial role in managing voltage levels within power electronic circuits. These transformers serve as energy storage systems and are integral components in isolated DC-DC power converters designed to achieve substantial voltage amplification.
Inverters: In power electronics, a component is employed to transform direct current (DC) into alternating current (AC), finding applications in various contexts such as AC power supplies, uninterruptible power supplies (UPS), and similar uses.
Industrial Control Systems: In the context of enhancing the regulation of speed and torque for electric appliances, this component plays a crucial role in managing power distribution, thereby enhancing the overall performance of systems, including applications like rolling mills, cement mills, compressors, textile mills, and more.
Power Transmission and its Distribution: To mitigate power losses in various sectors or components, the utilisation of power distribution and transmission is employed to control voltage levels. This practice serves to enhance system efficiency and optimise overall performance in various operational contexts.
Lightning Systems: To maintain voltage levels, exercise control over brightness, and effectively manage the power supply for lighting systems and their operations.
Energy Storing Factor: Regarding energy storage devices like flywheels, batteries play a crucial role in ensuring the effective and steady conversion of power. This has been a highly challenging and intricate concern for electrical industries and various industrial applications. The utilisation of batteries as a resource in utility sectors contributes to cost savings by reducing capital expenses.
Renewable Source of Energy: Power electronics find primary applications in solar panels, wind turbines, and geothermal resources where power conditioning systems are essential. These systems facilitate enhanced grid integration and conversion processes, ensuring usability and efficiency, ultimately making them more user-friendly. For instance, when dealing with solar cells that produce DC power, the conversion to AC power necessitates the utilisation of power electronic converters.
Electronic Gadgets: Power electronics find extensive applications in electronic gadgets, enhancing their functionality and efficiency. From smartphones to laptops, these devices rely on power electronics to regulate voltage and current, ensuring longer battery life and optimal performance.
Military and Airspace: In these fields, extensive research spanning several decades has been conducted. Notable examples include power drive controls, landing gear, defensive aids systems (DAS), flight communications and control, avionics, and signal systems processing for military radar applications. The integration of power electronics technology is instrumental in reducing heat generation and enhancing both performance and efficiency.
In the realm of aviation and defence, advanced semiconductors like silicon carbide (SiC) are being specifically developed to meet the stringent performance and size requirements of aircraft and defence applications. Despite these specific uses, power electronics technology remains a pivotal component across various domains, with ongoing endeavours to surmount challenges and enhance the performance, efficiency, and dependability of its components and systems.
Looking ahead, the evolution of power electronics is expected to be primarily influenced by the expansion of renewable energy sources, advancements in smart grid technologies, and notably, the integration of artificial intelligence and machine learning. These innovations are poised to have a substantial impact by rendering power electronics more accessible and cost-effective.
Power electronics find extensive applications across various sectors, from transportation and renewable energy to consumer electronics and industrial automation. It serves as the backbone of modern technology, enabling the conversion, control, and distribution of electrical power efficiently. In transportation, it's vital for electric vehicles and trains. In renewable energy, power electronics facilitate the integration of solar and wind power. Additionally, it enhances the efficiency of consumer electronics and industrial equipment. As technology advances, power electronics continue to play a pivotal role in driving innovation, sustainability, and energy efficiency across a wide spectrum of applications.
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