Variable Frequency Drives (Ac) help to save electrical vigor in mechanical machines. The drive allows to cut the power consumption using Insulated Gate Bipolar Transistors (Igbt) as switch to control the frequency and voltage of the yield power. Vfds are ready in the shop for collection of mechanical machines. Typically the variable frequency drives are useful in lifts, stamping machines, hoists, cranes, and automation applications in the industries.
Lgis (Lg industrial Systems) is a famed manufacturer of the Vfds. The Lg 1ph Starvert Ig series drives suits the industrial and industrial lifts. The drives are compact, have easy factory mounts. Also the drives are convenient for low funds applications where the control panel uses micro-controllers as the processing units.
Variable Frequency Drive Basics
The drives also give a flexible interface to a number of programmable logic controllers (Plcs) in the market. All you need is a programmed Plc and the communication cable that connects the two electronic devices. Normally the cable is Rs485 compatible.
The drive helps to cut the mechanical jerks because of acceleration at the start and stop of the lift. The turn in acceleration is spread over two speeds: low and high. Two nearnessy sensors limit the physical travel of the lift between the start point and stop point near the halts in this travel. At start,the speed of the lift is slow for about 30% of the travel near the stop point of the lift. The high speed covers the remaining 70% travel.The lift mechanic installs these sensors near the door of the lift.
The interfacing of the drive with the control panel of the lift is easy, three connections for slow speed, fast speed, and brake execution are necessary.Also a tasteless electronic earth connects the drive and the control panel.
The drive connects between the 1ph 220V electrical power contribute and the 1ph electrical motor. The drive acts as an electrical switch to control the power contribute to machine to accomplish distinct speeds. The drive varies the frequency and voltage of the power contribute to the electrical machine, thus increases the torque at starts of the motor. The modified torque gives additional benefit at start of the motor with increased load capacity.
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