Abstract
The bearingless switched reluctance motor (BLSRM) is emerging as an attractive option for modern industrial applications because of the features, such as compact size, lubrication and seal free performance, long lifeand ability to rotate at very high speed and high power. The control approach is extremely fundamental to a steady operation because of itshighly nonlinear, multi variable and open loop unstable nature. This paper presents a single neuron based rotor suspension control of a 12/14 Hybrid Pole BLSRM with autonomous rotation and suspension poles. This hybrid pole structure produces the suspension force linearly with respect to rotor position and independent of the torque characteristics. Implementation of a non model based Single neuron adaptive PID Controller by avoiding the modeling complexity is proposed. Experimental results demonstrate that the proposed controller maintains the rotor in the center position as well as the speed tracking and disturbance elimination performances independently.
Highlights
High-speed motors are required in modern industrial applications such as turbo molecular pumps, centrifugal pumps, compressors and so on [1,2,3]
A bearingless motor is a motor integrated with magnetic bearing, with many benefits, such as compact size, lubrication and seal free performance, long life, low cost and assists the motor to rotate at very high speed and high power [8-9]
The magnetic suspension force and torque can be created in a same unit and their control is carried out with less number of power electronic converters, controllers, and connection wires when contrasted with a motor having magnetic bearings The majority of the proposed bearingless switched reluctance motor (BLSRM) structures are based on conventional SRM structure, which complicates the rotor eccentricity control due to the existence of coupling between the suspension force control and the torque control
Summary
High-speed motors are required in modern industrial applications such as turbo molecular pumps, centrifugal pumps, compressors and so on [1,2,3]. The magnetic suspension force and torque can be created in a same unit and their control is carried out with less number of power electronic converters, controllers, and connection wires when contrasted with a motor having magnetic bearings The majority of the proposed bearingless switched reluctance motor (BLSRM) structures are based on conventional SRM structure, which complicates the rotor eccentricity control due to the existence of coupling between the suspension force control and the torque control. H et al proposed a hybrid BLSRM by separating suspension force pole with torque pole to minimize the inter-dependency of two forces Due to this decoupling poles, the suspension force control can be achieved [13]. It is extremely hard to decouple the torque from levitation force
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