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In this paper, a new module structure of phase locked loop (PLL) speed controller is first proposed for permanent magnet brushless dc (PMBLDC) motor drives to achieve both fast response and high accuracy. The proposed standard module renders the controller design rather simple and straightforward. In addition, in order to reduce the drive cost, a phase current sensing scheme is adopted to properly...
In this paper, first, an equivalent scalar dynamic model for the three-phase brushless dc (BLDC) motor is derived to simplify the control of the electric vehicle (EV) drive. Then, an equivalent armature current sensing technique is proposed for synthesizing the three-phase line current by using the low-side switches of the inverter as current sensors. No additional current sensors are required and...
In this paper, a phase-locked-loop (PLL)-assisted internal model (IM) adjustable-speed controller for brushless DC (BLDC) motors is proposed. Major contributions include proposing a new adjustable-speed module structure of PLL controllers for BLDC motor drives and integrating an IM control strategy and a novel complete motor current sensing scheme. By employing the proposed PLL-assisted IM control...
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