Two common methods exist for driving induction motors with VFDs – linear scalar control, which is often labeled as V/f, and vector, or field-oriented control, which can be a bit more complex to understand. Variable frequency drives are the industry-standard method of controlling 3-phase induction motors. The output of a VFD creates a DC pulse … Read more
Nearly all industrial engineers have heard of a VFD. But what does VFD stand for, how do they work, and why would we prefer using a VFD to control motors for heavy loads? The VFD solves the challenges of driving a 3-phase motor with careful speed control and efficiency, without being overly cost-prohibitive in most … Read more
To increase the flexibility of a motor control system, a variable frequency drive (VFD) is a common device that solves many motor control problems. In this article, learn how to control manual input of VFDs. Variable frequency drives solve many of the challenges associated with driving three-phase motors including adjustable speeds, networking many motors together … Read more
AC motors are common throughout industry – easily controlled by VFDs and without the maintenance that comes with DC brushes. So then, why are DC motors still used in certain applications? Direct Current (DC) Motors All motors work on the principle of switching magnet forces to rotate a shaft. A DC motor uses direct current … Read more
Power delivered to devices can be changed by raising or lowering the voltage and current. But this method does not always produce intended results. Pulse width modulation (or PWM) can be used to better control variable loads. What is Pulse Width Modulation? Load devices are designed to run efficiently and perform their respective tasks when … Read more