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KB Electronics' brand standard off-the-shelf DC Drives provide variable speed for DC motors from sub-fractional to 5 horsepower* available in 115 and 208/230 Vac - 50/60 Hz with 1Ø input.

A variety of optional accessories are also available to meet the most demanding applications.

*For OEM applications, custom drives are available.

KBTC - SCR Drive - Chassis

The KBTC controls are designed to control a motor’s torque by controlling motor current. Unlike a traditional KBIC, which controls voltage and limits current, the main potentiometer of the KBTC sets current. The KBTC connections are the same as a KBIC control and can use the same accessories, such as the Barrier Terminal Board and Barrier Terminal Kit. The SI-5 signal isolator can also be used to allow a remote voltage or milliamp current signal to set motor torque. The control includes a fixed value of a Plug-in Horsepower Resistor (0.015 Ohm) for all motor sizes.

KBIC - SCR Drive - Chassis

The KBIC Series of DC Drives consist of six models rated for 1/100 to 3 horsepower motors.* All models can be used on a wide range of motor horsepower by inserting a Plug-In Horsepower Resistor**, which is required to operate the drive. Speed range is 50:1 with load regulation of 1% of base speed. These chassis drives include MOV transient protection, trimpot adjustments for MIN, MAX, ACCEL, IR, CL, and a 5k ohm potentiometer. This drive also contains Auto Inhibit® which provides a smooth, safe start during rapid switching of the AC line.

Options: Auxiliary Heat Sink, Barrier Terminal Kit, Barrier Terminal Board, SI-5 Signal Isolator, Combination Fuse kit. AC line and Armature fuse supplied separately.

*An Auxiliary Heat Sink is required when operating motors above ½ HP at 90 Vdc and 1 HP at 180 Vdc.

**Plug-In Horsepower Resistor, AC line fuse and Armature fuse supplied separately.

KBMM - SCR Drive- Chassis

The KBMM Series of DC Drives consist of three models rated for 1/100 to 3 horsepower motors.* This chassis full-wave DC motor control is the ultimate in reliability and performance. The drive contains Direct-Fed CL that helps protect the SCR power bridge against shorts due to commutator arcing and prevents motor demagnetization. 25 Amp SCRs and AC line and armature fusing** further enhance reliability. A Plug-in Horsepower Resistor* is required to operate the drive and eliminates the need for recalibration when used over a wide range of motor horsepower. They include an AC line fuse holder and an Armature fuse holder, MOV transient protection, trimpot adjustments for MIN, MAX, ACCEL, DECEL, IR, CL, and a 5k Ohm potentiometer. This drive also contains Auto Inhibit which provides a smooth, safe start during rapid switching of the AC line.

Options: Auxiliary Heat Sink, Barrier Terminal Kit, Barrier Terminal Board, Finger Safe Cover, and SI-6 Signal Isolator.

*An Auxiliary Heat Sink is required when operating motors above ¾ HP at 90 Vdc and 1½ HP at 180 Vdc.
**Plug-In Horsepower Resistor, AC line fuse and Armature fuse supplied separately.

KBMG - SCR Drive - Chassis

The KBMG Series of DC Drives includes two models rated for 1/100 to 2 horsepower motors. This chassis ultra-compact, full-wave regenerative drive is capable of operating DC PM or Shunt motors in a bidirectional mode. Its 4-quadrant operation provides forward and reverse torque in both speed directions. Included is jumper selectable Input AC Line Voltage, Armature Current, Motor Armature Voltage, Analog Input Voltage, Control Mode (Speed or Torque) and Coast to Stop (CTS) or Regenerate to Stop (RTS). The Overspeed Protect Circuit prevents failure of the power bridge in extreme overhauling conditions. The reliability of the KBMG has further evolved with the use of a high-speed current limit circuit and MOV Transient Protection. Power on and motor overload LEDs are provided for diagnostics. Power connections are made via quick connect terminals and signal input connections are made via a removable terminal block. This drive also contains Auto Inhibit which provides a smooth, safe start during rapid switching of the AC line. A 5k Ohm potentiometer is included.

KBRG SCR Drive “Regen Reversing” – Chassis

The KBRG Series of DC Drives consist of three models rated for 1/8 to 5 horsepower DC, Permanent Magnet and Shunt motors. These are full-wave regenerative controls, which allows forward and reverse torque in both speed directions. Features include armature and tachometer feedback, built-in horsepower selection, an AC Line fuse, and an Armature fuse. Trimpots adjustments for Fwd CL, Rev CL, IR Comp, Resp, Max Spd, Offset, Deadband, Fwd Accel, Rev Accel, Timed Current Limit (TCL), and two torque modes. LED indicators for power on, current limit, Fwd Enable, and Rev Enable. A 5k Ohm potentiometer is included. This drive also contains Auto Inhibit which provides a smooth, safe start during rapid switching of the AC line.

The KBRG-255 is designed specifically for 5 HP shunt wound and PM DC motors. It is similar to the KBRG-225D (3 HP); however, the SCR ratings and heat sink size have been enhanced.

Option: KBRG SI-4X Bipolar Signal Isolator.