A new chapter 9 has been added to report KD 718. The title of this chapter is: “Use of a 4-pole motor frame size 160L and a 40-pole armature”. The armature has 40 mechanical poles but four magnetic poles and it can therefore be used in combination with the original 400/690 V, 3-phase winding. The armature has 360 preference positions per revolution and the peak on the cogging torque will therefore bee very low.

Report KD 748 has been added at the menu KD-reports. The title of this report is: “Ideas about a 16-pole radial flux permanent magnet generator with a 3-phase, 1-layer stator winding with no iron in the coils”.

A new chapter 10 has been added to report KD 341 about the develoment of the VIRYA generators. The title of this chapter is: “Back to the modified 4-pole asynchronous motor with a standard 230/400 V winding”.

Report KD 732 about the VIRYA-14 has been reviewed. Chapter 7 has been changed completely. The title of this chapter is now: “Use of the VIRYA-14 in combination with fourteen detached houses”. So the twenty semi-detached houses are replaced by fourteen detached houses. The reason is that the note about the semi-detached houses is no longer public. The (Dutch) note about the detached houses can be copied from my website at the menu “No wind energy”.

A new chapter 7 has been added to report KD 718. The title of this chapter is: “Use of a 4-pole motor frame size 100L and a 32-pole armature”. The armature has 32 mechanical poles but 4 magnetic poles and can thereforte be used in combination with the original 4-pole, 3-phase winding of a 3 kW motor. This armature has 288 preference positions per revolution and the peak on the cogging torque will therefore be very low. I think that this is the simplest and cheapest way to modify an asynchronous motor into a PM-generator.

A new chapter 8 has been added at 14-5-2023. The title of this chapter is: “Use of a 4-pole motor frame size 80 and a 28-pole armature”.

A new chapter 7.6 has been added to report KD 580. The title of this chapter is: Using a 30-pole armature and a different winding”.