A Review Note on Different Components of Simple Electromagnetic Levitation Systems

Banerjee, Subrata; Sarkar, Mrinal Kanti; Biswas⃰, Pabitra Kumar; Bhaduri, Rupam; Sarkar, Prasanta

doi:10.4103/0256-4602.81241

Cited by 15 publications

(7 citation statements)

References 44 publications

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“…Different types of structures can be used for the AMB system shown Figure 4. Similar types of elements are required for these actuators: a stator, rotor, power amplifier etc (Banerjee et al, 2011). Electromagnetic analysis has been carried out for checking the performance of different structures (as shown in Figure 4) using ANSYS Maxwell and the result is presented.…”

Section: 𝑑𝑡mentioning

confidence: 99%

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Study and analysis on some design aspects in single and multi-axis active magnetic bearing (AMB)

Debnath

2021

JART

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Active magnetic bearing (AMB) is a substitute of conventional bearing, which provides electromagnetic force to support the rotating part respecting the stator. The utilization of electromagnetic force makes this bearing “active”. The attraction force of an AMB system can be control by manipulating the input so that the rotor can be levitate at required position. As lot of limitation exist in passive magnetic bearing, the AMB is very useful in modern applications. Due to frictionless nature of magnetic bearing and non-necessity of lubricants, now-a-days AMB is taking place as the alternate of any other bearing in multiple applications of growing industry. Adequate knowledge of essential components is necessary for successful implementation of any active magnetic bearing design. So, In this paper, the magnetic analysis has been analyzed for the different types of single and multi-axis AMB using ANSYS Maxwell with extensively reviewed components.

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Section: 𝑑𝑡mentioning

confidence: 99%

“…A contactless sensor must be used to measure the displacement of the floating rotor, which will give a better output. The performance of the AMB mainly depends on the following features of the sensors (Banerjee et al, 2011;Jiang & Kshirsagar, 2016).…”

Section: Sensormentioning

confidence: 99%

Study and analysis on some design aspects in single and multi-axis active magnetic bearing (AMB)

Debnath

2021

JART

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“…And by means of it, Han designed a brilliant method that avoided the flutter. According to the algorithm of the discrete tracking differentiator in document [29], it can be assumed that the discrete step is ℎ, any point on the phase plane is ( 1 , 2 ), and then the discretionary result of (1) is (4). And the control force is determined by (5).…”

Section: Synthesis Function Of Second-order Discrete Time-optimalmentioning

confidence: 99%

“…The suspension control system cannot guarantee the suspension stability without the speed signal obtained by acceleration sensor. How to obtain the fault information of acceleration sensor timely and conduct fault-tolerant control promptly is important to guarantee the safety and stability of the maglev train [4][5][6]. With the rapid development and enormous advantages of maglev train, the research on the fault detection for the suspension control system is both theoretically and practically significant.…”

Section: Introductionmentioning

confidence: 99%

Fault Detection Based on Tracking Differentiator Applied on the Suspension System of Maglev Train

Zhang

Xie

2015

Mathematical Problems in Engineering

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A fault detection method based on the optimized tracking differentiator is introduced. It is applied on the acceleration sensor of the suspension system of maglev train. It detects the fault of the acceleration sensor by comparing the acceleration integral signal with the speed signal obtained by the optimized tracking differentiator. This paper optimizes the control variable when the states locate within or beyond the two-step reachable region to improve the performance of the approximate linear discrete tracking differentiator. Fault-tolerant control has been conducted by feedback based on the speed signal acquired from the optimized tracking differentiator when the acceleration sensor fails. The simulation and experiment results show the practical usefulness of the presented method.

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“…Importantly, unlike the non-zero-mean current ( ) in the EMS technology 11,12 , the current for the zeropower PEMS technology fluctuates about zero due to external disturbances 10,13 . Though the full-bridge pulsewidth-modulation (PWM) inverter 2 (also known as the power converter 14 or the chopper 3 ) can drive the zero-mean current in the electromagnet according to the PWM duty cycle ( ), there are few works analyzing its electronic nonlinearity that could be one of the most critical factors for the zero-power PEMS technology.…”

Section: Introductionmentioning

confidence: 99%

Zero-Power PEMS System with Full-Bridge PWM Inverter: from Mechanism to Algorithm

2021

Preprint

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The permanent-electro magnetic suspension (PEMS) technology takes advantage of the attractive magnetic force between the magnet and the iron core and reduces the power consumption eventually to zero. However, the current of the zero-power PEMS system fluctuates around zero due to disturbances and suffers from the electronic nonlinearity. This work presents that the 2 µs turn-off delay (one electronic defect) of the integrated circuit (IC) L298N (one commercial full-bridge pulse-width-modulation (PWM) inverter produced by STMicroelectronics) leads to the nonlinear current-duty cycle characteristic, which undermines the control stability and limits the PWM frequency of the zero-power PEMS system. Moreover, the nonlinear mechanism is experimentally and theoretically analyzed for the critical PWM frequency and the sensitivity transition. Furthermore, this work proposes the compensation algorithm to overcome the electronic nonlinearity. It is demonstrated that the three-piece linearization approach stabilizes the PEMS system with only a few milliampere current and outperforms the two-piece counterpart with stronger robustness and smoother dynamics under the current-step-change test, especially for the PWM frequency higher than the critical value. Besides, the breakthrough of the critical PWM frequency by the compensation algorithm is of great significance for the dynamic performance of the high-speed PEMS transportation system.

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A Review Note on Different Components of Simple Electromagnetic Levitation Systems

Cited by 15 publications

References 44 publications

Study and analysis on some design aspects in single and multi-axis active magnetic bearing (AMB)

Study and analysis on some design aspects in single and multi-axis active magnetic bearing (AMB)

Fault Detection Based on Tracking Differentiator Applied on the Suspension System of Maglev Train

Zero-Power PEMS System with Full-Bridge PWM Inverter: from Mechanism to Algorithm

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