The KBVF Adjustable Frequency Drives provide variable speed control for standard 3-phase and
Permanent Split Capacitor (PSC)
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AC induction motors from subfractional thru 1
1
⁄
2
HP. The sine
wave 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 soft-start applications.
Due to its user-friendly design, the KBVF AC drive is easy to install and operate. Tailoring to specific
applications is accomplished with selectable jumpers and trimpots, which eliminate the computer-
like programming required on other drives. However, for most applications no adjustments are nec-
essary. For more advanced programming, PC based Drive-Link™ software is available.
Main features include adjustable RMS Current Limit and I
2
t Motor Overload Protection.
2
In addition,
Adjustable Slip Compensation with Static Auto-Tune and Boost provides high torque and excellent
load regulation over a wide speed range. Power Start™ delivers over 200% motor torque to ensure
startup of high frictional loads. Electronic Inrush Current Limit (EICL™) eliminates harmful AC line
inrush current.
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The drive is suitable for machine or variable torque (HVAC) applications. With option-
al Drive-Link™ software, the drive can be programmed for DC Injection Braking.
For AC line and motor wiring, quick-connect terminals are provided. Other features include
adjustable trimpots (MIN, MAX, ACC, DEC/B
4
, COMP CL), customer selectable jumpers (Automatic-
Manual Start, Motor Frequency, Frequency Multiplier, Forward/Reverse, and Line Voltage (dual volt-
age models only)). Diagnostic LEDs are provided for power (PWR) and drive status (ST). A 5 k
Ω
Main Speed Potentiometer is also included.
A Signal Isolator is optional on all models, which can be used for single-ended or bidirectional speed
control and accepts voltage or current signal input. Other optional accessories include Class “A”
and “B” AC Line Filters, Dynamic Brake Module, Multi-Speed Board, Programming Kit, and Modbus
Communication Module. A connector is provided for easy installation of accessories.
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