control de motor ac pic16f84a
You have not indicated the voltage and power rating of the motor.
If it is just a small motor of 50V and less than 2 A, You can drive it with a Microcontroller of the motor control family(16f684a) or the 18f series with dedicated motor control peripheral. You would also require an H bridge as an interface between PIC and Motor. For very low power, L29X family would meet your requirment.For higher power, you would need Discrete H Bridge to meet the demand of motor, or IGBT with IGBT driver modules which can be interfaced with the PIC Micro.