Control of Electrical Drives

Leonhard, Werner

doi:10.1007/978-3-662-11371-4

Cited by 885 publications

(132 citation statements)

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“…It should be added that the approach in [6] was mainly spread in German language and remained practically unnoticed in the English literature until the eighties of the past century. (See, e. g., the prefaces to books [13] and [14]). …”

Section: Introductionmentioning

confidence: 99%

Space phasor theory and control of multiphase machines through their decoupling into equivalent three-phase machines

Serrano-Iribarnegaray

2013

Electr Eng

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Section: Introductionmentioning

confidence: 99%

Space phasor theory and control of multiphase machines through their decoupling into equivalent three-phase machines

Serrano-Iribarnegaray

2013

Electr Eng

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“…The electromagnetic torque is then given by (27) We now show that is also a valid expression for torque in the nonlinear magnetics case: (28) For a three-phase machine with pole-pairs, the torque equation becomes (29) Hence, the above expression for torque is valid, even in the case of saturable rotor leakage. He has published technical papers on power distribution systems, induction machine control, and the design of synchronous reluctance machines.…”

Section: Appendix Torque Calculation With Saturating Rotor Leakagementioning

confidence: 77%

“…Results show a practical lower limit for this type of system is about 3 Hz. However, with separate coils used for sensing flux, systems have been reported to work well at frequencies above 0.5 Hz [28].…”

Section: Methodsmentioning

confidence: 99%

Stator-flux-based vector control of induction machines in magnetic saturation

Hofmann¹,

Sanders²,

Sullivan³

IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting

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Abstract-In many variable-torque applications of induction machines, it is desirable to operate the machine at high flux levels, thus allowing the machine to produce higher torques. This can lead to saturation of the main flux path, introducing crosscoupling effects which can severely disrupt the performance of controllers dependent on knowledge of the machine's magnetic parameters. Stator-flux-oriented torque-control schemes need not depend on the magnetic parameters of the machine and, hence, are potentially more robust and easier to implement in magnetic saturation than rotor-flux-oriented control. In this paper, we present and analyze a stator-flux-oriented torque-control scheme. This controller only requires knowledge of the stator voltage, stator current, and stator resistance. An analytical expression for the maximum achievable torque output of the machine using a linear magnetics model is compared with values calculated using a nonlinear magnetics model incorporating saturation of the main flux path and is shown to be a good approximation at high flux levels, when the main flux path is heavily saturated. Experiments carried out on a 3-hp 1800-r/min wound-rotor induction machine show smooth operation of the control scheme at torque levels up to at least four times rated torque.

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“…It is simple and it has good control behaviors. Moreover, there are basic researches [1][2][3][4] that propose the control methods for automatic electric drives to optimize the energy consumption, but no one of methods contain specification for the belt conveyors.…”

Section: Introductionmentioning

confidence: 99%