Predicted versus actual performance of the model scale compulsator system

Kitzmiller, J.R.; Cook, K.G.; Hahne, J.J.; Hotz, T.J.; Manifold, S.M.; Pappas, J.A.; Penney, C.E.; Pratap, S.B.; Rech, B.; Thelen, R.F.; Walls, W.A.; Werst, M.D.; Zowarka, R.C.; Rienstra, W.W.; Nejezchleb, A.

doi:10.1109/20.911855

Cited by 37 publications

(16 citation statements)

References 15 publications

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“…As PA designs mature toward higher energy and power densities, the resulting power required to charge the field windings efficiently has also increased. Field charging power levels exceeding 300 MW have been demonstrated [1] in the laboratory, and future designs far exceeding this level of charging power are expected. An external dc power source is not practical, so PAs must rely on the self-excitation process to energize the field windings.…”

Section: Introductionmentioning

confidence: 99%

Field Initiation Design Fundamentals for Pulsed Alternators

Kitzmiller

2007

IEEE Trans. Magn.

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Abstract-Efficient high performance pulsed alternator (PA) systems have low impedance field windings that rely on very fast current rise times in order to maintain attractive system efficiencies. These systems rely on positive feed back self-excitation, or 'bootstrapping' action, to energize the field winding. The self-excitation process is typically started by a small capacitor based power supply which is discharged (or seeded) directly into the field winding. The design of this power supply, often called the Field Initiation Module (FIM) is critically important to the process of self-excitation.Augmented by numerical simulations, this paper examines the important aspects to consider when designing a proper FIM including: Impact on system efficiency Minimum rotor speed for proper FIM function Control schemes for triggering the FIM Proper operating voltage for the FIM

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Section: Introductionmentioning

confidence: 99%

Field Initiation Design Fundamentals for Pulsed Alternators

Kitzmiller

2007

IEEE Trans. Magn.

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“…In the range of MW-level power, the compulsators are usually aircore with solo electrical excitation [5][6][7]. There exists very low efficiency due to the very high loss.…”

Section: Introductionmentioning

confidence: 99%

Design of Halbach hybrid excitation compulsator

Cui

Zhao

2014

2014 17th International Symposium on Electromagnetic Launch Technology

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Pulsed alternators integrate kinetic energy storage, electromechanical energy conversion and pulse shaping in one unit, and it is the research focused on the field of pulsed power sources . The electrical excitation and the permanent magnet excitation are contained in one hybrid excitation pulsed generator together in which the advantages of two different excitation types are integrated. The brush slip ring mechanism with low reliability and high maintenance costs can be cancelled. And the electromagnetic field can be adjusted quickly by external electrical excitation source and correspondingly the performance can be quickly adjusted.An all-iron-core hybrid excitation compulsator prototype had been designed, fabricated and optimized. The hybrid excitation concept was validated in the research of compulsator. Although the compulsator researches are mainly focused on the all-air-core electrical excitation topology, there exist some bottleneck technologies which restrict the application of compulsator in actual fields. The hybrid excitation compulsator can decrease the cost, increase the reliability and widen the application scope of compulsator, especially in the middle-low power range. Halbach array is a permanent magnet arrangement structure which is a combination structure of different directions arrays. The Halbach array offers a number of attractive features in comparison with the normal array one. And the air-gap magnetic flux can be increased and the rotor yoke magnetic flux is decreased. Based on it, the Halbach array can be designed on the composite rotor core. A partair-core compulsator which includes an air-core rotor and an ironcore stator was designed. For analyzing the electromagnetic design results, the three dimensional model was built and finite element analysis method was used. The performances simulation results of the Halbach hybrid excitation compulsator were presented.

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“…While the CCEMG was being tested, design and development work was begun on a multiphase CPA and railgun system, the model scale CPA [5,6], which has been operated at the highest power density demonstrated by a CPA to date. This paper uses the information and experience gained during those developments to examine the advantages and disadvantages of single and multiphase CPA systems designed to drive a cannon caliber class load.…”

Section: Introductionmentioning

confidence: 99%

Single and multiphase compulsator system architectures: a practical comparison

Kitzmiller¹,

Pappas²,

Pratap³

2001

IEEE Trans. Magn.

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Abstract--The Center for Electromechanics at the University of Texas at Austin (UT-CEM) has designed, built, and tested three generations of iron-core and air-core compensated pulsed alternators (CPA). These include the iron core, small caliber, cannon caliber, and model scale compulsators. Early CPA were single-phase machines that were optimized for a specific load and desired performance. The most recent machine, the modelscale CPA, is a multiphase alternator coupled to the load through a rectifier. This paper includes a discussion of the requirements and capabilities of both single-phase and multiphase systems, a point design for each system type, and a comparison of system performance in driving a cannon caliber launcher.

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Predicted versus actual performance of the model scale compulsator system

Cited by 37 publications

References 15 publications

Field Initiation Design Fundamentals for Pulsed Alternators

Field Initiation Design Fundamentals for Pulsed Alternators

Design of Halbach hybrid excitation compulsator

Single and multiphase compulsator system architectures: a practical comparison

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