Abstract
This paper describes a self-bearing 8/6 switched
reluctance motor (SRM). The main challenge with such a
motor is how to control both torque and radial forces.
This task is particularly challenging because the double
saliency of the machine type causes the characteristics
of the motor to be highly nonlinear. In this paper, we
first present a switching logic for the 8 stator coils.
The current in the 8 phases is defined by using three
current
components and the rotor angle. After that, we propose a
model that could be used in the closed loop control to
solve the required stator currents from needed radial
forces and torque. The force and torque models are based
on first and second order polynomials, which are fitted
to data that have been obtained by two-dimensional
electromagnetic finite element analysis. In this paper we
compare the performance of the analytical model with
the finite element analysis data, and use the analytical
model for direct open loop control. The results show that
the proposed analytical model can be used to calculate
the required stator currents that are needed to operate
the self-bearing SRM. The models can be combined with
closed loop control methods in order to properly
control the machine.
Original language | English |
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Title of host publication | Proceedings of ISMB15 |
Number of pages | 8 |
Publication status | Published - 2016 |
MoE publication type | Not Eligible |
Event | 15th International Symposium on Magnetic Bearings, ISMB15 - Kitakyushu, Japan Duration: 3 Aug 2016 → 6 Aug 2016 |
Conference
Conference | 15th International Symposium on Magnetic Bearings, ISMB15 |
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Abbreviated title | ISMB15 |
Country/Territory | Japan |
City | Kitakyushu |
Period | 3/08/16 → 6/08/16 |
Keywords
- switched reluctance machines
- self-bearing machines
- modelling
- control
- finite element method