Medical Electronics
The changing role of power electronics in the medical industry
Paul Bentley, managing director of GD Rectifiers, explains the technological transformation affecting the medical industry and how power electronics are playing a part
T
he medical industry is undergoing a profound technological transformation, driven by advances in digital health, portable diagnostics,
sophisticated treatment and the evolution of AI systems.
At the heart of this development lies power electronics, an often overlooked but mission-critical discipline that ensures medical devices operate safely, reliably, and efficiently. As healthcare environments expand beyond traditional hospitals into homes and remote settings, the role of power electronics has shifted from a supporting function to a central enabler of innovation.
Understanding power electronics in medical applications
Power electronics is defined as the branch of electrical engineering concerned with the conversion and control of electrical power using electronic devices. Unlike conventional electronics, which focus on processing signals, power electronics is dedicated to managing energy, ensuring that voltage, current, and frequency are precisely regulated for a given application. In medical devices, this control is critical. Equipment such as MRI scanners, ventilators, infusion pumps, and diagnostic monitors all depend on stable, noise-free electrical power. Even minor fluctuations can compromise performance or, in worst-case scenarios, patient safety.
At a system level, power electronics in medical applications typically includes several core components: AC/DC converters (rectifiers): These devices convert mains alternating current (AC) into direct current (DC), which is required by most electronic circuits. Rectifiers are fundamental to medical power supplies and must meet stringent safety standards, including high isolation to protect patients from electrical shock.
18 May 2026
DC/DC converters: A DC/DC converter transforms one DC voltage level into another, enabling different subsystems within a device to operate at their required voltages. In medical devices, these converters must deliver ultra-low noise outputs and often include galvanic isolation to prevent leakage currents reaching the patient.
Inverters: These convert DC back into AC where required, such as in imaging systems or motor-driven medical equipment.
Power semiconductors: Devices such as MOSFETs, IGBTs, and thyristors act as high-speed switches, enabling efficient energy conversion and regulation. The development of these components has been fundamental to the evolution of modern power electronics systems. Together, these elements form sophisticated power architectures capable of delivering precise, reliable energy under demanding conditions.
Components in Electronics
The growing importance of power electronics in healthcare Historically, medical equipment was largely confined to controlled hospital environments with stable power infrastructure. However, today the landscape has changed dramatically. The rise of portable and home-based healthcare devices has introduced new challenges for power electronics design. Modern devices must now operate across a wide range of conditions while maintaining compliance with strict regulatory standards such as IEC 60601. These standards enforce requirements for electrical isolation, electromagnetic compatibility (EMC), and leakage current limits, ensuring that devices are safe for direct patient contact.
Additionally, the increasing complexity of medical electronics has heightened the need for clean and stable power. Sensitive diagnostic equipment often processes
signals in the microvolt range, meaning that any electrical noise introduced by the power supply can distort results or lead to misdiagnosis.
Power electronics also plays a crucial role in enabling: Miniaturisation: Compact DC/DC converters allow devices to become smaller and more portable without sacrificing performance.
Energy efficiency: High-efficiency power conversion reduces heat generation and extends battery life in portable devices.
Reliability: Robust designs ensure continuous operation in life-critical applications.
Interoperability: Advanced power systems support integration with digital and wireless technologies in connected healthcare ecosystems.
As healthcare demand grows driven by ageing populations and increased
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