Single- and three-phase alternating current (AC) motor speed can be controlled by controlling the frequency of the voltage coming to it. Motor speed has a lot to do with the capacity of refrigeration ...

The three-phase AC motor is designed to be operated from an AC supply, which has a fixed voltage and frequency. The supply frequency and the number of poles in the motor set the synchronous speed ...

When this output from the frequency converter is connected to an AC motor, it's possible to adjust the motor speed. When using an AC drive for adjusting the motor speed, there are many applications ...

Figure 1. AC inverters, also called AC drives or variable frequency drives, provide the frequency and voltage needed to drive an AC motor. AC drive application basics. Pumps, fans, and conveyor ...

The topic of motors and motor control techniques is wide and varied. Part one of this two-part article will cover the principles of alternating-current (AC) motor operation and control. Part two will ...

Turndown ratio in AC motor speed control July 31, 2019 by William V. Schrottky, Technical Writer ... which controls the speed by modifying the frequency fed to the motor.

Figure 7 The waveforms show motor-supply voltage and current with frequency clamping. Source: Texas Instruments. The inclusion of a simple clamp circuit satisfies the goal of starting up a DC motor ...

AC motors could be order at different rpms of 3600, 1800, 1200 for operation on 60Hz. Pumps and fans were run with across-the-line starters at fixed frequency applied to the AC Motor. AC Motors ...

When energy-efficiency costs come into play, more designers are opting for the electronically commutated motor rather than familiar AC and DC versions. For motor applications, engineers have ...

The "Gears, Drives and Speed Changers - Global Strategic Business Report" report has been added to ResearchAndMarkets.com's offering. The report provides separate comprehensive analytics for the ...