A Variable Frequency Drive(VFD) is a power conversion electronic device used to control the speed of an AC induction motor, by converting a fixed frequency, fixed AC supply voltage to a variable frequency AC voltage input to the motor. And since the frequency is directly proportional to RPM (Revolutions per Minute), the RPM speed of…
The Variable Frequency Drive (VFD) is an electronic device used to control the speed of an AC motor, by converting the fixed frequency and fixed AC voltage being supplied to the motor into a variable AC frequency and voltage. By adjusting the motor’s input frequency and supply voltage, the VFD can control an AC motor…
The term HVAC is an acronym that stands for Heating, Ventilation, and Air Conditioning; it broadly describes systems that provide heating and cooling to commercial and residential buildings for environmental comfort. A typical HVAC system includes Heating equipment, Ventilation equipment, and Air-Conditioning or Cooling equipment; the functions of these three elements are interrelated, particularly when…
Drives that control motor speed such as Variable Frequency Drives (VFDs), AC Drives, and Variable Speed Drives (VSDs) include a rectifier unit, in which the AC voltage is supplied to the drive is converted into DC voltage. In most of these motor drives, this rectifier unit makes use of standard P-N junction diodes (two-layer diodes)…
A Variable Frequency Drive (VFD), also known as a Variable-Speed Drive (VSD), Adjustable-Frequency Drive (AFD), Frequency Converter (FC), Adjustable Speed Drive (ASD), Microdrive, AC drive, or an Inverter driver, is an electronic controller used to regulate the rotational speed of induction or synchronous electric motors. The VFD controls motor speed by varying the frequency of…
VFDs or Variable Frequency Drives are controller systems including motors that give varying output speed as per input command. The capacitor forms DC links the whole VFD system. The voltage across this DC link is an important parameter to be controlled. This voltage is input to the inverter and thus acts as a reference voltage…
DO Supply sells used surplus products. DO Supply is not an authorized distributor, affiliate, or representative for the brands we carry. Products sold by DO Supply come with DO Supply’s 1-year warranty and do not come with the original manufacturer’s warranty. Designated trademarks, brand names and brands appearing herein are the property of their respective owners. This website is not sanctioned or approved by any manufacturer or tradename listed.
Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer’s warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.
