DC motors are smaller in size compare to the AC motors. This making the DC motors more suitable to be used in small appliances that using small amount of power and where the speeds need to be controlled. The speeds of DC motors are easy to be control, simply by introducing a resistance. The levels of the speeds are based on the value of the resistances, the higher the resistance is, the slower the speed will be produced. DC motors also produced a stable and continuous current. The current produced is usually in small amount and not good in producing power over long lengths. DC motors have been proven that their can’t be used to generate electricity because the power was lost as the electric was transmitted. In producing the current, Brush DC motors use rings that conduct current while the Brushless DC motors use a switch, both are for forming the magnetic drive that power up the rotor.
AC MOTOR
AC power gets its name from the fact that it alternates in power. Alternate current or AC alternates between positive and negative and the number of times it does per minute is called cycles. Depending on the number of poles in the motor, the speed is constant. The amount of power given off by an AC motor is determined by the amount of power needed to operate the system. Today, there are many type of the AC motors each is used differently based on what type it is. The commonly used AC motors are single phase AC motors and polyphase AC motors. Single phase AC motors are known as general purpose motors. This is because they work well in many different situations. These AC motors work great for systems that are hard to start because they need a lot of power up front. Three phases AC motors or also called polyphase AC motors, are the AC motors that usually found in industrial environment. These motors also have high starting power built that transmit lower levels of overall power.
No comments:
Post a Comment