Equivalent Circuit of PWM-Fed Induction Machine With Damper Winding for Noise and Vibration Reduction

Influence of the load angle on magnetic radial forces and torque ripple of a low power permanent magnet synchronous machine

“…The acoustic behaviour can basically be improved by modifying the machine structure to reduce the radial component of magnetic origin force [1,2] or to move the stator natural frequencies away from those of the exciting forces [3]. A recent mean of passive reduction of magnetic forces is done by connecting capacitors to the stator damper windings [4]. However, the proposed solutions cannot always be suitable with manufacturing process requirements, and generally, a compromise must be taken to reduce the radial forces without compromising the torque, which relies on multi-objective optimization processes [5].…”

Design of an induction machine with damper windings for noise and vibrations reduction

“…Because the geometry is now fully designed, analytical calculations of resistances and leakage inductances of the machine (Lipo, 2017) allow one to establish the parameters of the equivalent diagram of Figure 3. l s is the leakage inductance of the stator winding; and l ' az is a mutual inductance relative to the common flux between the stator and the auxiliary, which does not link the rotor winding (Bauw et al , 2018a; Bauw et al , 2018b). lac' corresponds to the leakage flux of the auxiliary, which does not link any other winding; this flux is essentially composed of coil-end leakage.…”

A comparative study of LC filter and damper winding for noise reduction of PWM-fed IM

“…1) Main Principle: The damper or auxiliary winding consists in adding a second three-phase winding which is superimposed to the initial stator winding and sharing the same slots [10]. The damper is wound at the top of the stator slot, close to the air-gap, as shown in Fig.…”

“…2) Equivalent Circuit: The equivalent electrical circuit of an induction machine with damper winding [10] is given in Fig. 3.…”

“…This method has the advantage of being passive but often requires a lot of space. Moreover, the iron and copper of such filters make it heavy, and its inductances are likely to be noisy; • Previous works [10] suggest to use an additional threephase winding, called damper winding, wound into the…”