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What is the speed control of AC and DC motors?

DC controls adjust speed by varying the voltage sent to the motor (this differs from AC motor controls which adjust the line frequency to the motor). Typical no load or synchronous speeds for an AC fractional horsepower motor are 1800 or 3600 rpm, and 1000-5000 rpm for DC fractional hp motors.

What is speed control of AC drives?

Speed control is obtained by the phase control method by controlling the r.m.s. value of the AC voltage. This AC speed control method can provide steady speed control by closed-loop phase control even in the unstable range.

Why is speed control of AC motor necessary?

Safety: In some applications, controlling the speed of induction motors is important for safety reasons, such as in conveyor belts or lifts. Overall, speed control of induction motors allows for better efficiency, process control, equipment protection, and safety in various industrial and commercial applications.

What are adjustable speed AC drives and its operations?

AC Adjustable Speed Drives In order to change the speed, AC controllers are used to change the frequency of the applied signal by changing the 60 Hz signal to DC and then changing the signal back to AC of varying and controllable frequency and voltage. These controllers are known as inverters.

What is the purpose of speed control?

These devices control the speed of the motor by directly changing the frequency or the amplitude. By using the system to that end, there are hardly any heat losses and the speed control provides numerous programs that allow you to operate the machines.

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