What does the D axis and the Q axis mean for AC induction motors?
AC asynchronous motor is a kind of electric drive device which transforms electric energy into mechanical energy. It is mainly composed of stator, rotor and air gap between them. After the stator winding leads to the three-phase AC power supply, the rotating magnetic field is generated and the rotor is cut to obtain torque. Three phase AC asynchronous motor has many advantages, such as simple structure, reliable operation, low price, high overload capacity, convenient operation, easy installation and maintenance. It has been widely used in various fields.
The motor rotor has established a coordinate system, the coordinate system and the rotor synchronous rotation, the rotor magnetic field direction as d axis, perpendicular to the rotor magnetic field direction as q axis, the mathematical model of the motor will be converted into coordinates, can realize the decoupling of d axis and q axis, so as to obtain good control characteristics.
The D axis and the Q axis represent the direct axis and communicate. By decomposing the stator current into the direct axis component and the quadrature axis component, the armature responses are calculated respectively so as to better control the stator currents.In permanent magnet synchronous motor control, in order to obtain similar control characteristics of DC motor,
