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Due to its high torque density, the interior permanent magnet synchronous machine (IPMSM) is nowadays often used in electric vehicle applications. For an efficient machine operation, a proper control strategy has to be implemented. Because of the inherent non-linearities, the control is often based on lookup tables covering the entire operating area. The proposed control strategy relies on lookup...
The direct-flux field oriented control of Interior Permanent Magnet motor drives is evaluated, with particular attention to very high speed operation in the maximum torque per voltage region. A new control technique is proposed to overcome the stability problem of direct flux control based on flux and quadrature current control. The proposed control is easy to be implemented, it is independent of...
In this paper, a robust field-weakening control strategy for IPMSM drives is proposed to achieve fast response and minimum copper loss. First, the classification of three operation regions for positive speed operation is adopted. It is seen that current limit and voltage limit will affect the maximum torque capability and minimum copper loss operation. Second, in order to achieve minimum copper loss...
The presence of an LC input filter in an electrical system often leads to degradation of dynamic performance and instability of the system. This paper addresses the global stability study of an electrical system containing a DC power supply, an LC Filter and a constant power load. This latter is realized by a voltage source inverter-permanent magnet synchronous motor or induction motor. To stabilize...
The paper deals with a novel approach for the real-time tracking of the maximum-torque-per-ampere (MTPA) trajectory of an IPM motor drive. The proposed approach is based on the injection of proper tests signals and allows the MTPA trajectory to be learned and updated in the drive during steady-state conditions. The analytical development of the estimation algorithm, supported by a complete validation...
This paper proposes a nonlinear sliding mode speed control scheme for interior permanent magnet synchronous motor (IPMSM) drives. The drive uses an adaptive sliding mode observer for rotor speed estimation. Global asymptotic stability of both the controller and observer are guaranteed by Lyapunov stability analysis. Very low speed and standstill performance of the drive is further enhanced by combining...
This paper presents robust self-tuning maximum torque per ampere (MTPA) control algorithm for an interior permanent magnet synchronous motor (IPMSM) drives. Proposed algorithm utilizes conventional control scheme, where speed controller produces stator current command signal for the MTPA block. That block decomposes commanded current Is into its components along direct and quadrature axes id and iq...
This paper proposes a novel voltage trajectory control method for flux weakening operation of surface-mounted permanent synchronous motor drives. The difference between the switching period and summation of active switching times for inverter PWM control is used for flux weakening control, which will be used to modify the d-axis current reference. Since the voltage trajectory of inverter output which...
This paper deals with the flux-weakening control of surface mounted permanent magnet synchronous motors, taking into account the influence of the resistive voltage drop in the stator windings, an effect which is usually neglected in similar studies. At first, the motor equations exploiting the optimal torque-speed limits in the flux-weakening region are evaluated and discussed. Then, the influence...
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