Journal ArticleDOI
Optimum Compensator Design for the Flexible Rotor in Magnetically Suspended Motor to Pass the First Bending Critical Speed
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TLDR
An effective phase-leading compensation method is presented to compensate the large phase lag of the switching power amplifier and shows that the optimum compensator can minimize the displacement resonance peak, when the rotor passes the first bending critical speed with low amplifier current.Abstract:
This paper proposes a phase compensator design for the flexible rotor in the high-energy-density magnetically suspended motor (HEDMSM), whose rated rotational speed is above the first bending critical speed. The optimum phase and magnitude of the control system nearby the critical speed are analyzed. Additionally, the coil inductance of the large-power HEDMSM is always large. That will lead to large phase lag and make optimum compensator design more difficult. Therefore, an effective phase-leading compensation method is presented to compensate the large phase lag of the switching power amplifier. Then, the optimum compensator is designed and carried out in the 315-kW HEDMSM. The experimental results show that the optimum compensator can minimize the displacement resonance peak, when the rotor passes the first bending critical speed with low amplifier current.read more
Citations
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Journal ArticleDOI
Design and Adaptive Sliding-Mode Control of Hybrid Magnetic Bearings
TL;DR: In this paper, a hybrid magnetic bearing (HMB) prototype system is designed and analyzed and a nonlinear adaptive sliding-mode controller is designed for the position control of the rotor in axial direction.
Journal ArticleDOI
High-Precision Sensorless Drive for High-Speed BLDC Motors Based on the Virtual Third Harmonic Back-EMF
TL;DR: In this article, an active compensation method based on the virtual third harmonic back electromotive force incorporating the SFF-SOGI-PLL (synchronic-frequency filter incorporating the second-order generalized integrator based phase-locked loop) is proposed to precise detect the commutation points for sensorless drive.
Proceedings ArticleDOI
Design, Construction and Modeling of a Flexible Rotor Active Magnetic Bearing Test Rig
TL;DR: In this paper, the authors describe the design, construction and modeling process for an AMB test rig which contains a 1.23m long flexible steel rotor, with a mass of 44.9 kg and two gyroscopic disks.
Journal ArticleDOI
Design and Analysis of a Novel Bearingless Motor for a Miniature Axial Flow Blood Pump
TL;DR: In this paper, a novel design for the axial flow blood pump is proposed, based on the bearingless permanent magnet (PM) motor concept, with the design of the impeller, the rotor, and the stator explained.
Journal ArticleDOI
Multiphysics Global Design and Experiment of the Electric Machine With a Flexible Rotor Supported by Active Magnetic Bearing
TL;DR: A multiphysics global design method was proposed, and an electric machine with a flexible rotor supported by active magnetic bearing was developed based on this method to resolve a series of actual engineering problems for future industrial air blower application.
References
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BookDOI
Magnetic bearings : theory, design, and application to rotating machinery
TL;DR: In this paper, the authors survey the principle of active magnetic suspension, hardware components, actuators, and losses in magnetic bearing motors, and design criteria and limiting characteristics for fault tolerance.
Journal ArticleDOI
Robust Sliding-Mode Control Design for a Voltage Regulated Quadratic Boost Converter
Oswaldo Lopez-Santos,Luis Martinez-Salamero,Germain Garcia,Hugo Valderrama-Blavi,Tomas Sierra-Polanco +4 more
TL;DR: In this paper, a robust controller design for output voltage regulation in a quadratic boost converter with high dc gain is discussed, where an inner loop based on sliding-mode control whose sliding surface is defined for the input inductor current is modified by a proportional integral compensator in an outer loop that operates over the output voltage error.
Journal ArticleDOI
Improving Operational Performance of Active Magnetic Bearings Using Kalman Filter and State Feedback Control
TL;DR: A linear quadratic Gaussian controller, consisting of an extended Kalman filter and an optimal state feedback regulator, is implemented and it is shown that this controller yields improved rotor positioning accuracy, better system dynamics, higher bearing stiffness, and reduced control energy effort compared to the conventionally used proportional-integral-differential control approaches.
Journal ArticleDOI
Model Predictive Direct Current Control of Modular Multilevel Converters: Modeling, Analysis, and Experimental Evaluation
TL;DR: In this paper, a model predictive direct current control (MPDCC) with long prediction horizons is proposed to maintain the load current within tight bounds around sinusoidal references and minimize capacitor voltage variations and circulating currents.
Journal ArticleDOI
Design, Construction, and Modeling of a Flexible Rotor Active Magnetic Bearing Test Rig
TL;DR: In this paper, the authors describe the design, construction, and modeling process for a high performance active magnetic bearing (AMB) test rig which typifies a small industrial super-critical centrifugal compressor.