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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...
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...
In this paper, a rotor-flux-oriented control scheme for seven-phase induction motor drive, having the stator flux components instead of the stator current components as main control variables, is presented. As a consequence, a simple stator flux regulator can replace the conventional current regulators implemented in the synchronous reference frame. The proposed stator flux vector control (SFVC) scheme...
In this paper the problem of the modulation strategy of a five-phase inverter is completely solved using the duty-cycle space vector approach. Furthermore, the inverter voltage limit, under different operating conditions, with sinusoidal or non-sinusoidal output currents, is determined. The analytical approach is confirmed by experimental tests.
A multilevel converter topology feeding three-phase open-end winding loads is considered in this paper. The scheme is based on two insulated dc supplies, each one feeding a standard two-level, three-phase inverter. A three-phase six-wire load is connected across the output terminals. A new modulation technique able to regulate the sharing of the output power between the two dc sources within each...
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