Fisher and Paykel Generators/Alternators.
Fisher and Paykel are an Australian and New Zealand company that make white goods and are available around the world. As part of their range they make a type of washing machine called the 'Smart Drive', which has a great motor, which they call the "Direct Drive Motor".
Someone at some point discovered that these also make near perfect generators with great efficiencies, especially at lower speeds. These have also been found to have numerous other advantages.