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We discuss current funnel control for synchronous machines (SMs) which assures current reference tracking with prescribed transient accuracy without the knowledge of system parameters and the (nonlinear) flux linkage. We present a generic (nonlinear) model of SMs and a simplified actuator model of the voltage source inverter. The dynamics describe a two-input two-output system with positive definite...
In this paper, a highly efficient drive system for constant rotational speed applications, including a doubly fed permanent magnet synchronous machine (DFPMSM), will be presented. Due to loss minimization, most of the stator windings of the DFPMSM are directly fed by the electrical grid, while only some of the stator windings are fed by a low-power inverter to stabilize the complete drive system.
This paper chooses the AC induction motor drive system as the main subject and conducts research of its electromagnetic compatibility (EMC). First of all, the high-frequency common-mode model of ac induction motor model was established. Secondly, the mechanism and coupling paths of the drive system electromagnetic interference (EMI) were analyzed. Focused from inverter circuit structure optimization...
In this paper two operating modes available for permanent magnet synchronous machines (PMSM) are presented. This study aims to increase the efficiency of the motor-pump system. The PMSM is driven at variable speed and the inverter is controlled by space vector modulation theory. This study allows changing the component that produces magnetic flux (id), while the torque current component of PMSM (i...
Reluctance synchronous machine drives are known to be efficient, however are also known to have a poor constant power speed range. Interior permanent magnets are normally used in the reluctance synchronous machine to improve the constant power speed range. In this paper an alternative reluctance synchronous machine drive that extends the constant power speed range without using permanent magnets is...
In this paper, a new direct torque control (DTC) method of multi-phase induction motor for electrical propulsion is proposed. The classical DTC method for three phase induction motor uses the hysteresis-loop controller based on the switching table, in which the stator flux and torque ripple exists obviously. The new DTC method mentioned above applies the space vector PWM (SVPWM), which can achieve...
An on-line stator turn fault detection scheme, which is suitable for detecting turn faults in interior PM synchronous motor (IPMSM) drives, is proposed in this paper. It is investigatted that the asymmetries in the machine parameters caused by turn faults in current-controlled voltage source inverter (CCVSI)-driven applications result in a reduced positive sequence component of the machine terminal...
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