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C h a p t e r 1 | M o t o r C o n t r o l M e t h o d s making it attractive for portable and cost- sensitive applications. However, sensorless control introduces challenges, particularly at low speeds, at which back EMF signals are weaker and less reliable. Environmental considerations, such as temperature fluctuations and load variability, can also significantly influence motor control design. For example, high temperatures can degrade motor efficiency and increase power losses, while variable loads demand rapid adjustment of control parameters to maintain stability. Therefore, motor controllers must incorporate real-time feedback mechanisms to adapt to these conditions and ensure optimal performance. Qorvo helps designers choose the best motor control solution for their application by offering: • A comprehensive portfolio of motor control methods, including FOC and trapezoidal control • Comprehensive software and firmware libraries for various control methods • Highly integrated total motor drive solutions that reduce the need for dedicated auxiliary power supply controllers and external op-amps and comparators • Flexibility through sensorless or sensored control algorithms to optimize performance in cost-sensitive and compact systems • Reduced motor tuning and optimization efforts with features like auto-tuning for motor parameter identification and proportional-integral (PI) controller optimization • Solutions with integrated fault detection and safety mechanisms to monitor inverter power device voltage, current limiting, and temperature parameters and to provide early warnings for potential issues Andriy Brandis Platform Product Owner, Squad Lead, Husqvarna Group Balancing technical and financial requirements to achieve a sufficient solution guides the selection of motor control methods, from Hall-effect sensors to sensorless FOC." 8 10 Experts Discuss the Fundamentals of Motor Control