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This paper presents a new sensorless starting method for brushless DC motors without reversing rotation for unidirectional applications. The method can detect the rotor position at standstill and a specific start-up method is then used to accelerate the motor up to a middle-speed where conventional sensorless control algorithms based on the back- EMF can work properly. The proposed scheme employs...
This paper presents a single-chip FPGA implementation of a speed sensorless control IC with flux-linkage estimation algorithm for permanent-magnet synchronous motors (PMSM) with sinusoidal flux distribution. By using hierarchical and modular realization strategy, each functional block for the digital sensorless IC is designed as a reusable IP with FPGA implementation. The digital sensorless IC is...
This paper presents the design and architecture implementation of a digital position control IC for permanent magnet synchronous motors (PMSMs) with sinusoidal flux distribution using linear Hall sensors for low-cost motion control applications. The absolute rotor position is calculated from the measured Hall sensor signals and a speed estimator is devised to generate speed feedback for the servo...
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