Variable frequency drives troubleshooting larry stanley, regional sales engineer, january 2014. A vfd is capable of adjusting both the speed and torque of an induction motor. Warning caution throughout this manual we use the following two illustrations to make you aware of safety. With more than 50 years of experience in variable speed drive business, driveswarehouse stocks a large selection of ac drives, dc drives, variable frequency drives vfd, variable speed drives, adjustable speed drives, adjustable frequency drives, combo ac motor and drive combination and dc motor and drive combination in a wide range of. Safety instructions always follow safety instructions to prevent accidents and potential hazards from occurring. Whether you are looking for an inexpensive and tested drive or a new and innovative one, has a. Brief explaination about working of vfds, benefits and. Ac motor, main drive controller assembly, and driveoperator interface 210211. Benshaw offers an extensive range of rugged, reliable motor control solutions and accessories.
Variable frequency drives vfds popular speed control devices used in industrial, commercial and residential applications. Variable torque loads horsepower increases or decreases as cubic function of speed. Our low voltage soft starters enable precise control and advanced protection for three phase motors and motordriven equipment, with flexible mounting, enclosure and communication options available to meet your most demanding application requirements. Inverters variable frequency drives vfd plc xgt series glofagm series master k series hmi xgt panel xgt infou servo drive vsseries vpseries.
A variable frequency drive vfd is a type of motor controller that drives an electric motor by varying the frequency and voltage supplied to the electric motor. Rated capacity v 3vi is based on 220v for 200v class and 440v for 400v class. Nov 27, 20 easy setup instructions for the lsis vfd ig5a. They are used for running an ac motor at variable speeds or let them ramp up their speed to give them a smooth startup. Home decorating style 2020 for lg is5 inverter manual pdf, you can see lg is5 inverter manual pdf and more pictures for home interior designing 2020 32657 at manuals library. Each part of a variable frequency drive has the following function. As an example, ac 480v, 60hz supply is applied to the vfd which varies the signal voltage and frequency to have control of the speed. Pulse width modulation pwm variable frequency drive the unique method by which this type vfd creates variable voltage gives the pwm vfd its name. Huge energy savings potential operating centrifugal fans, pumps and compressors vary frequency of electrical.
This vfdv ac drive has gone through rigorous quality control tests at the factory before shipment. Variable frequency drive ls drive series s100 ie5 ic5 ig5a is7 ip5a iv5. Maximum output voltage will not be greater than the input voltage. Variable frequency drive inverter is5 precise vector control standard vfd 3 phase 0. In this manual, safety messages are classified as follows. Vfd drives were first introduced in 1983, and the insulated gate bipolar transistor has in the past 20 years become the standard for vfd drives as an inverter switching device. Ls ig5a micro drive inexpensive and instock call 8008482504 for info download. Duty weight kg indicates the maximum applicable capacity when using a 4pole lg motor. Variable frequency drive ie5 user friendly micro size slim vfd 1 phase 0. See the basic principle with the singlephase ac as the simplest example. Ls variable frequency drivels variable frequency drive.
The variable frequency drive evaluation protocol presented here addresses evaluation issues for variable frequency drives vfds installed on commercial and industrial motordriven centrifugal fans and pumps for which torque varies with speed. In two positions, the voltage is zero, ie, when all the phases are connected to the same dc bus, either negative or positive. A variable frequency drive vfd is a device that controls the voltage and frequency that is being supplied to a motor and therefore controls the speed of the motor and the system it is efficiency is improved. After the input power is applied or removed, the inverter will remain hot for. However, a over 500mm and b 200mm should be obtained for inverters with 40hp and above. A variablefrequency drive is a device used in a drive system consisting of the following three main subsystems. The above figure shows how the voltage and frequency are varied by a variable frequency drive. The variable frequency drive converts this line power into a pulsed output voltage that duplicates varying alternating current to a desired frequency speed. The is5 adopts sensorless vector control algorithm, and it improves not only the torque control characteristics, but the speed controlability in an uncertain condition. The ls starvert is7 is a high performance vfd, available in 480v up to 500 hp, providing full torque and precise control. Pulse width modulated, or pwm vfds, deliver a constant voltage hertz ratio with no line notching and very stable current input for the motor.
Energy savings using a vfd to control the speed of a variable torque load can be very large due to how centrifugal loads operate. As the first company to introduce a generalpurpose drive in korea and the. Warning caution throughout this manual we use the following two illustrations to make you aware of safety considerations. A 50% drop in speed produces almost an 88% reduction in power required to turn the load. Last 3 faults ip20 enclosure rs485 ls bus modbus rtu communication builtin option. Drv4 frequency mode keypad1 i012 p1 up io p2 down io40 fm output freqency io41 fm output gain 78% io42 detect frequency 51hz io43 d. Inspect the unit to insure it was not damaged during shipment. Variable frequency drive vfd pakistan ie5 ic5 ig5a ip5a is5 is7. After receiving the ac drive, please check for the following. Starvert is5 variable frequency drive catalog manualzz.
Jsmanuallsig5a frequencyinvertervfds jstechnik gmbh. Output frequency vf ratio linear, square patter, user vf. The ac electric motor used in a vfd system is usually a threephase induction motor. As the frequency is decreased, the speed of the motor also decreases. This is a user friendly drive, with a small footprint. Aug 10, 2008 as the first company to introduce a generalpurpose drive in korea and the. Head office lg twin towers, 20 yoidodong, youngdungpogu, seoul, 150721, korea. The basic configuration of a variable frequency drive is as follows. Receiving check to make sure that the package includes an ac drive, the user manual, dust covers and rubber bushings. Ac drives dc drives variable frequency speed drives vfd.
Drive type and motor control algorithm will effect how a vfd trips on opl acs550 only trips in vector mode vfd faults. Thank you for purchasing ls variable frequency drives. Other names for a vfd are variable speed drive, adjustable speed drive, adjustable frequency drive, ac drive, microdrive, and inverter. A converter is a device to create the dc from the ac power supply. Thank you for purchasing lg variable frequency drives. Adjustable frequency drives also known as variable frequency drives adjust a motors speed to closely match output requirements, resulting in a typical energy savings of 10 to 50 percent. Lg svis5 instruction manual pdf download manualslib. The auto tuning algorithm in is5 sets the motor factors automatically. How to wire a vfd variable frequency drive duration. Contents introduction block diagram building blocks modes of operation vfd parameters some potential problems harmonics and thd recent improvements in the ffcl system. It is available in 480 volts from 1 to 30 horsepower.
109 264 868 996 327 948 210 1053 235 1499 1611 190 384 638 106 362 485 635 822 41 224 537 1225 1033 1399 442 1381 15 150 949 268 280 235