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In this paper, a field oriented control scheme for torque and rotor flux regulation of a quadruple three-phase induction machine is presented. Each three-phase stator winding is independently supplied by a conventional three-phase inverter. The presented motor drive can be utilized in both medium and high power systems. Furthermore, owing to the intrinsic redundant structure, it can be employed for...
Among all control methods for induction motor drives, Direct Torque Control (DTC) is considered particularly interesting being independent of machine rotor parameters and requiring no speed or position sensors. The basic DTC scheme is characterized by the absence of coordinate transformations, current regulators and PWM signals generators. In spite of its simplicity, DTC allows a good torque control...
Multiphase drives are particularly attractive in medium and high-power applications such as railway and naval propulsion systems. In the most modern drives, a multiphase machine is driven by an IGBT inverter. This paper focuses the theoretical calculation of the power losses in multiphase inverters with an odd number of phases. This analysis could be useful for a preliminary assessment of the drive...
The main topic of this paper is the combination of two different technologies, i.e. the technology of tubular permanent magnet (PM) actuators, and the technology of multiphase drives. An electric drive consisting of two five-phase PM tubular actuators fed by a single five-phase inverter is described. The control scheme of the drive for position control is presented and the performance of the drive...
In this paper, a control strategy for seven-phase current-regulated induction motor drives is presented and tested. This strategy allows disturbance-free operations in the case of two stator open-phases, and achieves minimum stator copper losses. The proposed strategy is based on the multiple space vector representation of multi-phase systems. Hence, it is valid in steady-state as well as in transient...
Nowadays there is an increasing attention towards multiphase drives, especially for medium and high power applications. In this paper some modulation strategies for M-phase inverters are compared and the modulation strategy with the minimum switching losses is determined. If the switching devices of the inverter are IGBTs or BJTs, this modulation strategy turns out to be the one with the minimum total...
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