The only way to make an AC motor in a ceiling fan use less electricity is to have it move less air.
Thank you Biden for doing to our ceiling fans what you’ve done to our shower heads.
I have an antique table fan made in 1927. Robbins and Meyers.
It was my grandmothers A/C. The blades are cocked at about a 45 degree angle. Sucker moves some air.
If you can increase the power factor of the motor, it won't waste as much electricity. If you have to add capacitors and other electronics to the fan, it is likely the fan will fail well before current fans. Increasing the the power factor is usually used for big industrial systems.