I am building a new generator drive and I prefer to use low RPM generators. Therefore, 6-pole PMG would be just fine. Where can I get such a generator? any alternatives?
Anyway: look for some PMSM or BLDC motor with the appropriate power rating. BTW: I assume you are mentioning the stator poles that are usually multiples of 3 (for 3-phase motors resp. generators). The specs/data sheets typically give the number of rotor poles that would be 4 in this case.
Your question is not clear like whether you are looking for generator or motor or Motor- Generator set.However specification for Motor/Generator is along with No of poles you have think of current and voltage rating,accordingly you can look for the machine.Many companies supply these machines around the world.Better look for Native companies for cheaper and fast delivery. In india kirloskar,Bharat Heavy Electricals,will supply.