Is it possible to have an AC current applied to a DC motor ? How about an AC motor with DC current? how is this done?
AC voltage to DC motor. the motor will just vibrate back and forth and not rotate. It may burn out if the voltage is too high. DC voltage to AC motor, the motor will move to one phase and then draw too much current and get hot or burn out. There is a type of motor called a universal motor that can run on AC or DC. It is like a DC motor, but the field winding is switched by the commutator just like the main winding.
A wound field DC motor will run on AC, by connecting the field winding in series with the armature. An ordinary DC machine connected like this though would have high losses: DC machine designed for this need a laminated stator magnetic circuit, other wise there will be eddy current losses in the stator iron. DC motor with a laminated stator, with a series field connection are sometimes called a 'universal motor' because it will run from AC or DC. They are used often in household appliances (like vacuum cleaners and washing machines). Of course, AC supply can be recified to DC to run an ordinary DC machine. AC motors will not run from DC. Some electronic circuitry is needed (called an inverter) to produce AC from the DC supply to run an AC motor. Motors sometimes called 'brushless DC motors' are actually a kind of synchronous motor (AC), and need special circuitry to run, from a DC supply.
AC power to DC motor ----- motor shall not run at all and heats up. DC power to AC motor ---- it runs at the beginning then burn out.
