Xuefang Lin-Shi

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This paper presents a comparative study of three predictive current control schemes for permanent-magnet synchronous machine (PMSM) drives. The first control scheme predicts the future evolution of the currents for each possible configuration of the inverter legs. Then, the switching state which minimizes a given cost function is selected and applied during(More)
This paper presents the implementation of a hybrid-control strategy applied to a permanent-magnet synchronous-motor (PMSM) drive. Hybrid control is a general approach for control of a switching-based hybrid system (HS). This class of HS includes a continuous process controlled by a discrete controller with a finite number of states. In the case of ac motor(More)
This paper presents a control scheme suitable for systems composed of a continuous process modulated in energy by a power converter with a finite number of topologies. To track the continuous reference values, a topology of the power converter is determined from a criterion based on a process state variable model and taking into account the possible(More)
This paper proposes a position observation technique for either a salient or non-salient Permanent Magnet Synchronous Motor (PMSM). Combining high-frequency signal injection with an Extended Kalman Filter (EKF), the observer provides highly accurate position estimation over a wide speed range and even at standstill under heavy load conditions. Experimental(More)
Analogue control of monolithic DC/DC converters is technologically coming to a limit due to high switching frequency and a request for large regulation bandwidth. Digital control is now experimented for low-power low-voltage switch-mode power supply. Digital implementation of analogue solutions does not prove real performances. This paper compares a(More)
This paper presents different aspects involved in the application of fixed frequency Sliding Mode Control (SMC) to the DC-DC Single-Ended Primary Inductor Converter (SEPIC). The choice and influence of the sliding surface regarding the state vector are presented. Simulation results show that a sliding surface composed of the single integral of system's(More)
This paper presents a fully synthesizable digital controller for high-frequency low-power DC-DC switching mode power supply (SMPS). Key module of the digital controller is a Hybrid digital pulse-width modulator (DPWM), which takes advantage of Digital Clock Manager (DCM) phase-shift characteristics available in FPGA resource and combines a(More)
Mobile applications necessitate nowadays huge digital resources. Power management of a digital systems-on-chip is based on dynamic voltage scaling. DC/DC converters used to supply the digital system-on-a-chips are facing stringent constraints with respect to load transients, line transients, and reference tracking. Hysteretic control is known as the most(More)
In this paper, we present a novel control strategy for motor drivers, which we have called 'hybrid direct-torque control'. Based on models of both motor and inverters, the hybrid control uses a formal representation of inverter-machine behavior to determine the optimal switching state and vector application time. In contrast to conventional direct-torque(More)
Digital control technique is becoming an attractive alternative for high-frequency switching mode power supply (SMPS). This paper introduces a fully synthesizable digital sliding-mode (SM) controller for high-frequency dc/dc SMPS. The proposed SM controller is associated with a digital pulsewidth modulation (DPWM) block to operate at constant and high(More)