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Since the efficiency is very important in automotive applications, in this paper a new minimum-copper-loss control scheme, over full speed range for an IPMSM drive used for hybrid electric vehicle application under both current and voltage limits is presented. This paper presents an algorithm to get the smallest current vector command in both field-weakening and deep field-weakening regions for a...
This paper deals with torque control of high speed permanent magnet synchronous motor for driving a compressor of supercharged combustion engine. Control structure which includes regimes with both full magnetic flux and flux weakening is described. Paper describes the research working place and presents test results achieved on 40 000 rev/min synchronous permanent magnet motor.
This paper presents a signal injection method without torque variation for the position sensorless control. Proposed method utilizes the maximum torque control frame that makes torque ripple caused by a signal injection minimized. It is proved from the definition of the maximum torque control frame and evaluated by experimental results.
A motor control system driven by multiple distributed inverters has been proposed until now to improve the robustness and the fail-operational control performance of motor drivers just after some of the inverters break down. Its failure characteristics are examined and analyzed by some experiments using a permanent magnet synchronous motor (PMSM) with eight poles and twelve windings. The proposed...
The present paper investigates by FEM, on a case study, the gradual airgap surface PM single phase synchronous motor to obtain a good compromise between starting torque, average torque and torque ripple. Then, based on a dynamic circuit model, the torque pulsations with trapezoidal current control is explored through digital simulations with about 80%( from average rated torque) initial self-starting...
This paper introduces the structure of synchronous reluctance with permanent magnet (SR-PM) motor and its principle of direct torque control (DTC), especially focuses on characters of DTC in SR-PM motor. Then the (position/speed) sensorless strategy of SR-PM motor is studied. The key point of sensorless control is estimating the torque angle delta precisely. This paper presents two different compensating...
This paper deals with sensorless control of permanent magnet synchronous motor. The low-frequency signal injection estimator is studied in the case of salient PMSM. If there is an error in the estimated position, the injected signal creates a torque oscillation and affects the back-emf. The oscillating back-emf can be used to track the position and speed. The saliency of the PMSM is a disturbance...
This paper presents a robust observer based on association of a reduced order torque observer and Kalman filter. This approach makes it possible on the one hand to the control of PM synchronous motor without position encoder in spite of torque load variations and on the other hand, it makes it possible to reduce the ripple torque
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