Stator Side Voltage Regulation of Permanent Magnet Generators

Clements, N.D.; Venkataramanan, G.; Jahns, T.M.

doi:10.4271/2009-01-3095

Cited by 4 publications

(4 citation statements)

References 8 publications

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“…In applications such as aircraft power systems, a constraint on the maximum open-circuit stator voltage under unregulated conditions may be introduced for safety reasons [8]. In the designs considered here, the open-circuit voltage of the machine is set at 1.0 per unit at 1.0 per unit speed.…”

Section: Generator Parameter Selectionmentioning

confidence: 99%

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Design considerations for a stator side voltage regulated permanent magnet AC generator

Clements

Venkataramanan

Jahns

2009

2009 IEEE Energy Conversion Congress and Exposition

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The application of permanent magnet generators in variable-speed applications is made difficult by the lack of a direct field control and the variation of the stator voltage with shaft speed and also with load. This paper presents the use of reactive power injection into the stator as a means of regulating the stator voltage. Design-oriented analysis of the machine stator current and reactive power requirements for this mode of operation leads to the conclusion that high machine saliency enables excellent terminal voltage regulation over a specified speed and load range while minimizing stator current requirements. It is shown that the incorporation of saliency into the permanent magnet generator can significantly reduce the size of the reactive current source and the stator current that is required to regulate the stator voltage during operation over a broad range of speeds and loads. Experimental results are presented to confirm the basic principles of this approach.

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Section: Generator Parameter Selectionmentioning

confidence: 99%

“…The development of the equations has been previously published [8], and the results are repeated here for reader convenience.…”

Section: A Generator Operating Point Equationsmentioning

confidence: 99%

Design considerations for a stator side voltage regulated permanent magnet AC generator

Clements

Venkataramanan

Jahns

2009

2009 IEEE Energy Conversion Congress and Exposition

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“…The state vector x is defined in (6) where the tilde (~) is used to denote a small-signal deviation from an operating point value.…”

Section: Dynamic Model With Ideal Invertermentioning

confidence: 99%

“…The governing equations of the PMACG coupled to the voltage-source inverter can be developed to study the dynamic behavior of the system on the basis of the following assumptions [6]:…”

Section: Dynamic Model With Ideal Invertermentioning

confidence: 99%

Regulation of permanent magnet generators using angle control of stator-connected voltage source inverters

Clements

Venkataramanan

Jahns

2010

2010 IEEE Energy Conversion Congress and Exposition

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The use of a permanent magnet AC generator (PMACG) with a salient-pole rotor design combined with an appropriate power converter has recently been shown to be an attractive practical approach for implementing small power systems. Although a classical approach to realizing voltage regulation may be developed on the basis of reactive power control in power systems, it presents special challenges for variable-frequency operation, made more difficult by the presence of lightly-damped machine dynamics. This paper presents a simple and effective means for regulating the terminal voltage of the generator by controlling the DC voltage of a stator-connected voltage-source inverter. The paper presents a dynamic model that illustrates the source of lightlydamped behavior, followed by the introduction of power derivative equivalent feedback into the control system to obtain excellent performance. Computer simulations and experimental results are presented to demonstrate the effectiveness of this control approach.

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