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  • Understanding of Direct and Quadrature Axis Synchronous Reactance
    Field pole axis is also known as direct axis Based on this fact, a direct axis synchronous reactance is defined as the reactance offered to the armature flux when the peak of armature mmf is directed along the direct axis Let us understand this more clearly
  • Two Reaction Theory – Salient Pole Synchronous Machine
    The axis along the axis of the rotor is called the direct or the d axis The axis perpendicular to the d axis is known as the quadrature or q axis The direct axis flux path involves two small air gaps and is the path of the minimum reluctance
  • Reactances of synchronous machines - Wikipedia
    Since the equations naturally split into direct and quadrature components, many reactances come in pairs, one for the direct axis (with the index d), one for the quadrature axis (with the index q) This is often using direct-quadrature-zero transformation
  • Understanding of d-Axis and q-axis - eeediary. com
    The d-axis (direct axis) and q-axis (quadrature axis) representation simplifies the analysis of synchronous machines by transforming the complex three-phase system into two orthogonal components: 𝐖𝐡𝐲 𝐝-𝐪 𝐀𝐱𝐢𝐬?
  • 9. 10: Salient Pole Machines- Two-Reaction Theory
    The two components are aligned with the direct axis and with the quadrature axis of the machine The direct axis is aligned with the field winding, while the quadrature axis leads the direct by 90 degrees
  • Direct axis, Quadrature axis | NIDEC CORPORATION
    Direct axis, Quadrature axis Two-axis theory can be used as a way of analyzing a rotating machine In this theory, elements such as magnetic flux, current, and inductance are divided into two electrical orthogonal axial components and discussed
  • Blondels Two Reaction Theory of Synchronous Machines
    The axis of symmetry halfway between the adjacent north and south poles is known as quadrature axis or q-axis The q-axis lagging the north pole is taken as the positive q-axis The quadrature axis is so name since it is 90° electrical or one-quarter cycle away from the direct axis
  • Massachusetts Institute of Technology - MIT OpenCourseWare
    We identify equivalent armature windings in the direct and quadrature axes The direct axis armature winding is the equivalent of one of the phase windings, but aligned directly with the field The quadrature winding is situated so that its axis leads the field winding by 90 electrical degrees
  • Benha University Electrical Engineering Department Faculty of . . . - BU
    (i) field poles axis, called direct axis or d-axis and, (ii) axis passing through the centre of the interpolar space, called the quadrature axis or q axis, as shown in Fig 1
  • 1110-2019 - IEEE Guide for Synchronous Generator Modeling . . . - IEEE Xplore
    Scope: This guide contains instructions for modeling synchronous machines in direct- and quadrature-axis equivalent circuits, along with the basic transient and subtransient reactance time-constants model in view of stability studies





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