5 MW High Temperature Superconductor Ship Propulsion Motor Design and Test Results

Eckels, P. W.; Snitchler, G.

doi:10.1111/j.1559-3584.2005.tb00381.x

Cited by 47 publications

(24 citation statements)

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“…Its rotor may have salient or cylindrical poles [20]. The amplitude and frequency of the voltage on the generator side of an EESG converter can be fully controlled by the converter, independently of the grid characteristics [3].…”

Section: Electrically Excited Synchronous Generator (Eesg)mentioning

confidence: 99%

Generator with modulated magnetic flux for wind turbines

Gwóźdź¹,

Krystkowiak²,

Jędryczka³

et al. 2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. In the paper, the concept of a permanent magnet synchronous generator (PMSG) with uniquely designed stator windings for wind turbines is presented. Two 3-phase windings in the stator are used, one of which is connected in the star, while the other in the delta configuration. Six-pulse rectifiers, mutually coupled by the pulse transformer, whose primary winding is supplied by the so-called "current modulator", are placed at the outputs of both windings. The modulator output current should meet all the necessary and strict requirements. Both rectifiers operate on a common DC circuit. These solutions provide the sinusoidal magnetomotive force in the stator of the PMSG and the quasi-sinusoidal (taking into account the non-linearity of the magnetic circuit) magnetic flux. In light of the generator principle, it has been called the "PMSG with modulated the magnetic flux". The slightly higher complexity in the structure of the generator, as compared to the normal threephase construction, is compensated by the exceptional simplicity of the power electronics section of the system, which allows high efficiency to be reached. The current modulator (as well as the pulse transformer) is a power electronics converter with a relatively low output power as compared to the overall output power of the system. In comparison to other known solutions, the expected cost of the system should be lower. It is also expected that a high degree of reliability in terms of its operation will be achieved, and consequently, that the the ongoing costs of its maintenance will be reduced. In the paper, concept, theoretical basis of operation, and results of the studies of the simulation models of the generator, including the basic power electronics section, are presented.

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Section: Electrically Excited Synchronous Generator (Eesg)mentioning

confidence: 99%

Generator with modulated magnetic flux for wind turbines

Gwóźdź¹,

Krystkowiak²,

Jędryczka³

et al. 2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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“…The field excitation to the notional HTS motor is provided by a constant DC source of 1 pu magnitude. A detailed description of the design and characteristics of a prototype HTS motor is presented in [1]. …”

Section: A Notional Hts Motor Modelmentioning

confidence: 99%

“…NDERSTANDING the electromagnetic stator-rotor interactions in rotating machines with high-temperature superconducting (HTS) rotor windings is essential for improving the design and optimizing the operation of HTS motors under real-life conditions [1]. In particular, low frequency variations in the rotor field current, originating from torque and speed oscillations due to ship propulsion motor operation under sea state conditions, are of interest to the Navy and the motor manufacturer.…”

Section: Introductionmentioning

confidence: 99%

Application of a Time-Frequency Algorithm for Adaptive Estimation of Transfer Function of a Notional High-Temperature Superconducting Motor

Senroy

Suryanarayanan

Steurer

et al. 2007

2007 IEEE Electric Ship Technologies Symposium

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In this article, the application of a novel timefrequency analysis tool for estimating the transfer functions of a notional high-temperature superconducting (HTS) marine propulsion motor is demonstrated. Detailed simulation model of the notional HTS motor, with realistic load modeling of sea states to produce torque oscillations are utilized for the analysis. A method is presented for online near real-time estimation of transfer functions between the torque oscillations and the concomitant variations in field current and mechanical speed of the HTS motor. Index Terms-empirical mode decomposition (EMD); empirical transfer function estimation, fast Fourier transform (FFT); High-temperature superconducting (HTS) motor, Hilbert-Huang (HH) method; intrinsic mode function (IMF); torque oscillations.

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“…In addition, these motors are compatible with standard variable speed drives (VSDs) and they meet both U.S. Navy and commercial electric ship requirements, reducing both drive development effort and recurring costs. The range of benefits and advantages that HTS ship propulsion motors offer for both naval and commercial shipping applications [1][2][3][4][5][6][7] include the following:…”

Section: Introductionmentioning

confidence: 99%

The status of HTS ship propulsion motor developments

Kalsi

Gamble

Snitchler

et al. 2006

2006 IEEE Power Engineering Society General Meeting

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The development of ship propulsion synchronous motors with high temperature superconductor (HTS) field windings for Naval electric ship applications has progressed to the point where a full scale motor is now under construction. A 5 MW, 230-rpm prototype ship propulsion motor was built and tested by the Center for Advanced Power Systems (CAPS) on behalf of U.S. Office of Naval Research (ONR). It met or exceeded all its design goals. Currently, a 36.5 MW, 120-rpm ship propulsion motor is being built for delivery to ONR at the end of 2006. This paper presents test results of the 5 MW motor and the status of the 36.5 MW motor. Index Terms--ONR (U.S. Office of Naval Research), PWM (pulse width modulation), COTS (commercial-off-the-shelf), 1G (first generation (BSCCO) HTS wire), 2G (second generation (YBCO) HTS wire), VSD (variable speed drive)

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5 MW High Temperature Superconductor Ship Propulsion Motor Design and Test Results

Cited by 47 publications

References 0 publications

Generator with modulated magnetic flux for wind turbines

Generator with modulated magnetic flux for wind turbines

Application of a Time-Frequency Algorithm for Adaptive Estimation of Transfer Function of a Notional High-Temperature Superconducting Motor

The status of HTS ship propulsion motor developments

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