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.
There needs to be more information to answer this question. is there a pic of the answer choices or can you copy and paste them?
The answers is A the relationship is
Proportional side and length
Answer;
-Goes up
The "theoretical" price of one beer goes up for a second or subsequent DUI.
Explanation;
-If an individual receives their second DUI conviction, the state can seek subsequent offender penalties.
-The DUI penalties for a first DUI offense in Maryland is one year of incarceration. The maximum penalty for a second offense where there have been subsequent offender notices filed is two years of incarceration.
-Second-time offenders do not usually get sentenced to even a year in jail, which is the maximum for even a first offense.
