A drive is the digital camera that harnesses and controls the Electric Drive Motor china electrical energy sent to the engine. The drive feeds electrical power into the motor in different amounts and at various frequencies, thereby indirectly managing the motor’s swiftness and torque.
So the most economical choice would be a Three Stage Induction motor followed 
by a BLDC engine. I would suggest BLDC ( for its huge market penetration recently,ease of availability and easier electronics/control ) or PMSM (Long term magnet synchronous motors )