Motion Control & Drives


Variable frequency drives series

July 2005 Motion Control & Drives

The KBVF adjustable frequency drives provide variable speed control for standard 208-230 and 400/460 V 50 and 60 Hz 3-phase and PSC AC induction motors from under 750 W through 3,5 kW. The sinewave coded pulse width modulated (PWM) output operates at a carrier frequency of 16 kHz, which provides high motor efficiency and low noise. Adjustable linear acceleration and deceleration are provided, making the drive suitable for softstart applications. Its user-friendly design makes the KBVF easy to install and operate.

Tailoring to specific applications is accomplished with selectable jumpers and trimpots, eliminating the necessity for computer-like programming required on other drives. Most applications require no adjustments at all. For more advanced programming, PC-based Drive-Link software is available.

Main features include adjustable RMS Current Limit and I2t motor overload protection. Adjustable slip compensation with static auto-tune and boost provides high torque and excellent load regulation over a wide speed range. 'Power Start' feature delivers over 200% motor torque to overcome 'stiction' and ensure satisfactory start-up. Electronic inrush current limit (EICL) eliminates harmful AC line inrush current. The drive is suitable for machine or variable torque (HVAC) applications. With optional software, the drive can be programmed for DC injection braking.

For AC line and motor wiring, some models include quick-connect terminals. Models KBVF-27, 29, 45, 48 contain a barrier terminal block. Other features include: adjustable trimpots (CL, MAX, MIN, DEC/B6 ACC, COMP), customer selectable jumpers: line voltage (dual voltage models only), automatic-manual start/reset, motor frequency, frequency multiplier, forward/reverse).

Diagnostic LEDs are provided for power (PWR) and drive status (ST). A signal isolator and run/fault relay output contacts are provided on Models KBVF-45, 48 and are optional on all other models. Other optional accessories include: Class 'A' and 'B' AC line filters, dynamic brake module, multispeed board, programming kit, and modbus communication module. A connector is provided for easy installation of accessories. A 5 kΩ main speed potentiometer is also included.





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