Abstract
In order to reduce the costs of implementing the radial position control system of a three-phase bearingless machine with split winding, this article proposes a driving method that uses only two phases of the system instead of the three-phase traditional one. It reduces from six to four the number of inverter legs, drivers, sensors, and current controllers necessary to drive and control the system. To justify the proposal, this new power and control configuration was applied to a 250 W machine controlled by a digital signal processor (DSP). The results obtained demonstrated that it is possible to carry out the radial position control through two phases, without loss of performance in relation to the conventional three-phase drive and control system.
Highlights
Bearingless machines use magnetic forces to support the rotor shaft, reducing losses, and maintenance due to mechanical wear [1].Among the topologies of bearingless machines developed in recent years, three-phase bearingless induction machines
Applying the two-phase driving scheme in a three-phase bearingless induction machine with split winding is a new and challenging study once in this system, the control signal for radial position control is superimposed on the current signals produce torque
The results presented in this text cover the addition of the current control in the machine coils and the radial position control
Summary
Francisco Elvis Carvalho Souza 1,† , Werbet Silva 2,† , Andrés Ortiz Salazar 2,† , José Paiva 1,† , Diego Moura 2,† and Elmer Rolando Llanos Villarreal 3, *,†.
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