Nov 7, 2021 · The d,q axis is a universal way to describe the machine parameters, after it has been transformed in the d,q coordinate system. BLDC and PMSM optimally would have zero salience, while the reluctance machine RM is very different.

d-axis component of the stator current vector is used to control the rotor flux linkage and the imaginary q-axis component is used to control the motor torque. While PI controllers can be used to control these currents, bang-bang type current control provides better dynamic performance.

Jan 7, 2025 · 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?

Aug 2, 2018 · 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.

Jun 6, 2006 · Xq- Quadrature-axis Synchronous Reactance the ratio of fundamental A.C. armature Voltage to A.C. armature current produced by the quadrature-axis flux. For a specific machine; request those parameters from the manufacturer.

As a standard way of thinking, the direction of the field flux of the separately excited DC motor in fig. (a) can be considered as the direct axis (d axis), and the direction of the magnetic flux in the armature (the typical component in the armature core is considered to be horizontal), as the quadrature axis (q axis).

Jan 31, 2017 · The d axis and q axis: In geometric terms, the “d” and “q” axes are the single-phase representations of the flux contributed by the three separate sinusoidal phase quantities at the same angular velocity. The d axis, also known as the direct axis, is the axis by which flux is produced by the field winding.

This lesson covers the concept of D and Q axis in motors, specifically focusing on the Permanent Magnet Synchronous Motor (PMSM) and Interior Permanent Magnet Synchronous Motor (IPMSM). It explains why these axes are important, how they are used to calculate torque, and their physical presence in the motor.

3.1.2 The (α,β)->(d,q) projection (Park transformation) This is the most important transformation in the FOC. In fact, this projection modifies a two phase orthogonal system (α,β) in the d,q rotating reference frame. If we consider the d axis aligned with the rotor flux, the next diagram shows, for the current vector, the

The direct axis (d-axis) current components 90 degrees out of phase with BEMF voltages, produce reluctance torque in conjunction with quadrature axis currents. Therefore, there exists an infinite number of current vectors providing the same amount of torque.