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<p>This article presents a high gain, single switch voltage clamped DC–DC converter that incorporates a sensorless control strategy for brushless DC motors designed specifically for electric mobility systems. The converter aims to achieve a significant voltage gain while utilizing only a single active switch, simplifying the overall design by decreasing the number of components, complexity, and related costs. Notable innovations include a switched inductor and a clamping mechanism that effectively mitigate voltage spikes, lower switch stress, and reduce reverse recovery losses, leading to improved system efficiency. In terms of control, the system employs a sensorless commutation technique based on predefined voltage thresholds and the direction of the phase current, ensuring consistent motor operation without relying on back EMF zero crossing detection. This approach improves performance, particularly at lower speeds, where traditional methods often face challenges. A PI-regulated DC link is utilized to keep the voltage stable to the inverter, thereby ensuring precise torque and speed control during dynamic load variations. Simulations and experimental tests confirm the proposed converter’s excellent performance across various conditions. In comparison to traditional high gain converter designs and sensorless control techniques, the proposed system provides a compact, efficient, and robust solution well suited for the requirements of next-generation electric drive applications.</p>

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An integrated single switch voltage clamped converter and robust low speed sensorless control for high performance BLDC motor drives for electric vehicle (EV) applications

  • 期刊论文

  • 发表日期：

    2026年1月19日

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  • Konda Naresh,
  • D. Suresh,
  • Swapnajit Pattnaik

摘要

This article presents a high gain, single switch voltage clamped DC–DC converter that incorporates a sensorless control strategy for brushless DC motors designed specifically for electric mobility systems. The converter aims to achieve a significant voltage gain while utilizing only a single active switch, simplifying the overall design by decreasing the number of components, complexity, and related costs. Notable innovations include a switched inductor and a clamping mechanism that effectively mitigate voltage spikes, lower switch stress, and reduce reverse recovery losses, leading to improved system efficiency. In terms of control, the system employs a sensorless commutation technique based on predefined voltage thresholds and the direction of the phase current, ensuring consistent motor operation without relying on back EMF zero crossing detection. This approach improves performance, particularly at lower speeds, where traditional methods often face challenges. A PI-regulated DC link is utilized to keep the voltage stable to the inverter, thereby ensuring precise torque and speed control during dynamic load variations. Simulations and experimental tests confirm the proposed converter’s excellent performance across various conditions. In comparison to traditional high gain converter designs and sensorless control techniques, the proposed system provides a compact, efficient, and robust solution well suited for the requirements of next-generation electric drive applications.