Line start permanent magnet motors - Starting, standards and application guidelines

McElveen, Robbie; Melfi, M.J.; Daugherty, R.H.

doi:10.1109/pcicon.2014.6961876

Cited by 11 publications

(4 citation statements)

References 6 publications

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“…The reason for this was to select an inertial load capable of overloading the motor, if not for the control of the MR-VDT. This underlies the premise of a softstart, which often involves the use of a variable speed drive (VSD) for the motor or the addition of a fluid coupling, allowing the motor to gradually accelerate a load, without stalling or overloading itself [1,2]. Based on this concept, the control target for this mode of testing was chosen to be the load speed, controlling this under step inputs to observe basic behaviour, and then ramp inputs of different ramp-rates to investigate a simple soft-start procedure.…”

Section: Experimental Setup Modifications and Controller Designmentioning

confidence: 99%

“…Mechanical power transmission is a point of interest in many industries and commercial product design, with several factors influencing optimization goals and operating constraints. Such focal points of design include: efficiency [1,2], reliability [1,3], controllability [3,4], safety [2,3], weight and scale of design [3], and both production and operational costs [3,4]. As a strategy to meet some of these targets and avoid unwanted overloading, back-driving, or stalling [5], fluid couplings are often employed for large drives to facilitate reliable motor starts and stops.…”

Section: Introductionmentioning

confidence: 99%

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A magnetorheological fluid based planetary gear transmission for mechanical power-flow control

Christie

Sun

Quenzer-Hohmuth

et al. 2021

Smart Mater. Struct.

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Power transmission for mechanical systems often involves the use of clutching- or dissipative-elements to protect drive systems and provide steady output power. As standard implementations in motor-driven systems, these devices operate passively or in discrete states, providing limited controllability to the power output. This paper presents a magnetorheological-fluid-based differential (planetary) gear transmission which serves to variably couple motor power through a sun gear input to a load affixed to a planet carrier output. This is achieved both rapidly and continuously through controlled slippage between the ring gear of the device and its casing. Compared to conventional MR clutches, the unique functionality of the differential gearbox enables use of an MR brake with lower inertia than an in-line clutch. Through control of current supplied to the energizing electromagnet of brake component of the transmission, simple and reversible governing of output torque and speed is achieved. This behaviour is modelled and verified through testing, showing a 349% variation in brake torque for constant speed tests from the off state to the maximum capacity of the device, with a 262% variation in brake torque under a harmonic input displacement also observed. The versatility of the device demonstrated through PID speed and torque control.

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Section: Experimental Setup Modifications and Controller Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A magnetorheological fluid based planetary gear transmission for mechanical power-flow control

Christie

Sun

Quenzer-Hohmuth

et al. 2021

Smart Mater. Struct.

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show abstract

“…Existem alguns métodos para a partida eletromecânica de motores de indução trifásicos, entre elas estão: a partida direta; a partida estrela-triângulo; e a partida com chave compensadora. Com exceção do método de partida direta, todos os outros métodos permitem a redução da corrente na partida, por meio de uma menor tensão aplicada aos terminais do motor (McElveen, Melfi, & Daugherty, 2014).…”

Section: Partidas De Motores Trifásicosunclassified

Estudo De Aplicação De Lógica Fuzzy Em Qualidade Energia: Uma Revisão

Jesus¹,

Almeida²,

Río³

et al. 2021

Engenharia Elétrica: O Caminho Para O Desenvolvimento Sustentável

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está licenciado sob CC BY 4.0. Esta licença exige que as reutilizações deem crédito ao criador. Ele permite que os reutilizadores distribuam, remixem, adaptem e construam o material em qualquer meio ou formato, mesmo para fins comerciais. O conteúdo da obra e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores, não representando a posição oficial da Editora Amplla. É permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores. Todos os direitos para esta edição foram cedidos à Editora Amplla.

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“…However, when LSPMSM is used for direct on line (DOL) starting, there are two main drawbacks that limit the application of LSPMSM. One is the poor starting performance and the other is the large torque pulsation which could cause serious mechanical damage to the equipment especially for a large power LSPMSM (Melfi et al , 2015; McElveen et al , 2014). In industry field, the system efficiency of fans and pumps can be improved by adjusting the speed of the motor according to the load change.…”

Section: Introductionmentioning

confidence: 99%

Effect of high frequency harmonic voltage on the performance of line start permanent magnet synchronous motor

Qiu

et al. 2019

COMPEL

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Purpose A large number of high-frequency harmonic voltages exist in the output voltage of the inverter, which will affect the performance of the motor. The purpose of this paper is to obtain the influence of high frequency harmonic voltage on the performance of the line start permanent magnet synchronous motor (LSPMSM) and reveal the mechanism of influence. The research results can provide help for the design of LSPMSM driven by inverter drives. Design/methodology/approach First, the actual output voltage data of the inverter is collected, and then the fundamental voltage and high frequency harmonic voltage data can be obtained by performing the fast Fourier transformation method on the voltage data. Second, the finite element model is established. During the finite element calculation, the obtained fundamental voltage and the main harmonic voltage components are used as the voltage source. To research the effect of high frequency harmonic voltage on the performance of motor, a reference group without high frequency harmonic voltage is set up, which is used to compare and analyze the effect of high-frequency harmonics on the performance of the motor. To verify the correctness of the model, a prototype based on the model parameters is manufactured, and then the back EMF experiment and load experiment are performed. The test data and calculation results are compared and analyzed. Findings The coupling relationship between high frequency time harmonic magnetic field and low frequency space harmonic magnetic field is obtained. The stator copper loss and rotor eddy-current loss are calculated and analyzed under normal supply voltage and abnormal supply voltage, and the influence mechanism is revealed Originality/value The coupling relationship between high frequency time harmonic magnetic field and low frequency space harmonic magnetic field is obtained. The sensitivity of the high frequency harmonic voltage to the stator copper loss and rotor eddy-current loss is obtained, and the mechanism of losses change is revealed.

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Line start permanent magnet motors - Starting, standards and application guidelines

Cited by 11 publications

References 6 publications

A magnetorheological fluid based planetary gear transmission for mechanical power-flow control

A magnetorheological fluid based planetary gear transmission for mechanical power-flow control

Estudo De Aplicação De Lógica Fuzzy Em Qualidade Energia: Uma Revisão

Effect of high frequency harmonic voltage on the performance of line start permanent magnet synchronous motor

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