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A parameterized design of speed servo controller for brushless DC motors is presented based on a robust composite nonlinear control framework. The servo controller consists of a linear control part for achieving fast response, a nonlinear feedback part for suppressing the overshoot, and a disturbance compensation mechanism for erasing the steady-state error. A reduced-order extended state observer...
In this paper, a new control algorithm for brushless dc (BLDC) motor drives is presented. Direct self-control, which has been widely applied on induction motor drives in high-power low-frequency traction, is introduced to BLDC drives. The Cartesian coordinate system is selected with three coordinate axes X, Y, and Z mutually at right angle to each other with three phase axes a, b, and c being movable...
The direct torque control method of brushless DC motor (BLDC) is different from that of permanent magnet synchronous motor for its turn-off phase and non-sinusoidal back electromotive force. To overcome these problems, a novel direct torque control method is presented in this paper. In order to control the torque effectively and directly, the torque is calculated according to the back electromotive...
Direct torque control of brushless DC motor (BLDC) is complex for turn-off phase. And the direct torque control of brushless DC motor based on hyper space vector solved the problem, however, the torque ripple was obvious. A modified method is presented in this paper in order to reduce the torque ripple based on hyper space vector. For the turn-off phase only affects the stator flux linkage but not...
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