Macris Industrial Drives

If you're looking for a way to control the speed of your motor, you might be wondering what the difference is between variable frequency drives (VFDs) and  variable speed drives (VS). These devices are both electric motor speed controls, but they work in different ways and have different applications. In this article we'll explore how each one works and how they differ. Electric Motor Types and Applications A variable-frequency drive, or VFD, is a device that controls a motor’s operating speed. It does this by using an adjustable frequency of alternating current (AC) power from the grid to vary the speed of the motor.  A variable-speed drive, or VSD, uses pulse width modulation (PWM) to control electric motor speed in applications where the motor operates at constant torque rather than constant horsepower. Both types are available as either open loop or closed loop systems depending on whether they have feedback signals from their environments (e.g., sensors). The m...

The use of variable speed drives is becoming more and more popular. In the past, only large companies were able to afford this technology. Now that it has become more affordable, many people are considering it for their homes and businesses. This article will discuss what a variable-speed drive (VSD) is and how it works to control the speed of a motor.  You'll learn about some common characteristics of Vsd Electrical   as well as when they're appropriate for different applications like industrial machinery or household appliances like refrigerators and dishwashers. By the end of this article you'll understand why you should consider adding one of these useful devices to your home or office! What is a Variable Speed Drive? When you think of a variable speed drive (VSD), your mind probably jumps to the car you drive or the motor that runs the elevator in your office building. These are examples of AC motors, which use alternating current (AC) to generate torque to turn a s...

Variable speed drives (VSD) are necessary to produce smooth, constant motion in machines. Variable speed drives use electrical signals to control the speed of motors and other electric devices. The most common uses of VSDs include pumps, compressors and fans. Reasons for using variable speed drives  There are many reasons why you should use a variable speed drive. For example, it can save you money and reduce your carbon emissions by cutting down on excessive energy usage. Variable speed drives also allow for more efficient use of equipment, which ultimately increases productivity. Fundamental principles A variable speed drive (VSD) is a solid state device that uses semiconductors to control the current and voltage supplied to the motor by varying its frequency, voltage or both.  The principle of a VSD is based on controlling the speed of an AC motor. The VSD controls the current and voltage supplied to the motor by varying its frequency, voltage or both as determined by ...