Examlex
What type of supporting material is used in the following example? "Some people argue that sex education will result in teenagers wanting to engage in more sexual activity. This is like arguing that if you purchase insurance you will want to wreck your car."
Variable-frequency Drive
A system used to control the speed of an electric motor by varying the frequency and voltage supplied to the electric device.
Motor Controller
A device that regulates the performance of an electric motor by varying parameters such as voltage and current.
PWM
Pulse Width Modulation, a technique used to control the amount of power delivered to an electrical device by varying the duty cycle of a pulse signal.
Four-quadrant
Refers to operating modes of a drive or control system that can handle both positive and negative directions of both power and torque in all four quadrants of operation.
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