DC motors are usually seen in applications where the motor speed needs to be externally controlled. AC motors work best in applications where power performance is sought for extended periods of time. All DC motors are single phase, but AC motors can be single phase or three phase.
AC and DC motors use the same principle of using an armature winding and magnetic field except with DC motors, the armature rotates while the magnetic field doesn’t rotate. In AC motors the armature does not rotate and the magnetic field continuously rotates.
In some applications today, DC electric motors are replaced by combining an AC electric motor with an electronic speed controller, known as variable frequency drives. DC electric motors are replaced with an AC electric motor and an electronic speed controller because it is a more economical and less expensive solution.
DC electric motors have many moving parts that are expensive to replace, and DC electric motor repair is usually more expensive than using a new AC electric motor with an electronic controller.
In our experience, combining an AC motor and drive proves to be the most cost effective solution for mostapplications. When servicing our customers in the field, we often recommend looking at the SMVector Series Variable Frequency Drive in combination with a three phase AC motor.
Answer:
No, water is not wet, in fact, it is scientifically proven that water is not wet itself but it makes other materials wet when it sticks to the surface of them.
Societies can become more environmentally sustainable through economic development dedicated to improving the quality of life for everyone without degrading the earth's life-support systems.
Answer:
Fast transportation
Explanation:
make it store it faster the faster the more things the more money.
Answer:
polar bears
Explanation:
it is polar bears because this is there habitat and they can’t survive in warm places.
