KB Electronics KBWT Data Sheet

HIGH

KBWT

–

CURRENT

PULSE WIDTH MODULATED (PWM)

WHISPER-DRIVE

DC Motor Speed Control

Specifically Designed For DC Motors

That Require a 1.0 Form Factor

Provides Quieter and Cooler Motor

Operation and Extended Brush Life

Replaces Costly Choke & Capacitor Filtering

STANDARD FEATURES – All Models

• Short Circuit Protection

• Electronic Motor Burnout Protection (I x t)

• LED’s for “Power On” and Overload (OL)

• Active Bridge: Provides controlled AC line

inrush current limiting

• Power Transistor Short Circuit Runaway Protection

• Heat-Spreader: Prevents power transistor failure due to

overloads

• Under Voltage Protection

• Adjustment Trimpots:

Minimum Speed (MIN)▲, Maximum Speed (MAX), IR Compensation (IR)

• Potentiometer Safety Circuit (optional):

Prevents startup with the AC line unless speed potentiometer is set to zero

• Armature Fuse (optional)

Speed Range (Ratio) ...................................................... 50:1

Operating Frequency (KHz).............................................. >16

Form Factor (RMS/Avg Amps) ...................................... <1.05

Operating Temperature Range (°C).............................. 0 – 45

Load Regulation (% Base Speed) ...................................... 1*

Acceleration Range (Secs)

(Fixed 0 .2, 2.5, 7, 10).................................................... 2.5

MIN Speed Trimpot Range (% Full Speed) .................. 0 – 30

MAX Speed Trimpot Range (% Full Speed) ............ 50 – 100

CL Range (% Range Setting) .................................... 0 – 200

Motor Overload Protection Time

(Secs, Fixed 3,5,10).......................................................... 3

IR COMP Range (∆VDC).............................................. 0 – 15

AC Line Voltage Regulation (% Base Speed).................... 0.5

Analog Input Voltage (Voltage Following)

(VDC – Isolated) ........................................................ 0 – 5

Speed Potentiometer – 1/4 Watt (ohms) ............................ 5K

*Based on motor having linear IR Comp characteristics.

▲

, Current Limit (CL)

SPECIFICATIONS

▲

DATA SHEET D-265

DESCRIPTION

The KBWT Pulse Width Modulated (PWM) DC motor speed controls provide excellent dynamic response to load variation.The efficient PWM waveform produces an almost pure DC current to the motor (form factor < 1.05), which has several advantages over a conventional SCR control. PWM significantly lowers audible motor noise and provides longer brush life. It also produces less motor heating allowing a smaller, less costly motor to be used for most applications.Another advantage of PWM is higher output voltage, which provides increased output speed. In addition, pulse-by-pulse current sensing provides short circuit protection and prevents control damage due to shorted motors.

A unique feature of the KBWT Series is its active bridge, which provides a substantial reduction in AC line surge current each time the control is turned on.This allows the control to be turned on or off rapidly without damage to critical components. The KBWT also contains a built-in safety circuit that will shut down the control if the main power transistor short circuits. This prevents high-speed runaway, a potential problem with competitors’ controls.

The KBWT utilizes heat-spreader construction. This system provides an enhanced thermal path that eliminates overtemperature cycles which cause premature failure of the power transistors.

Other features of the KBWT are (I x t) motor burnout protection, which will shut the control down if the motor is overloaded for a predetermined time, and the Potentiometer Safety Circuit™ (optional), which prevents the control from starting when the AC line is applied unless the speed potentiometer is reset to zero. Diagnostic LED’s for “Power On” and “Overload (OL)” indication are also provided.The control contains quick disconnect terminals as standard. A potentiometer (5K), isolated analog input signal (0-5 VDC), or PWM microprocessor output can be used to vary the output of the control.

KBWT-110

* CE Compliance Requires KBRF-200A RFI Filter

A Complete Line of Motor Drives

Rev.______(A_______)

ELECTRICAL RATINGS

MICROPROCESSOR

OUTPUT

22K

5.1K

100K

V+ P1P2 P3

IR MAX MIN

TYPICAL MICROPROCESSOR CONNECTION

Model No. KB Part No.

AC Line Voltage

(VAC) -

10%,+15%

(50/60 Hz)

Maximum

AC Line Current

(RMS Amps)

Amps DC@ Output

KBWT-16 8614 115 10.0 6.0 90 6.0 130 10.0 .75 (.5) 1.5 (1.1) 15 KBWT-26 8615 230 10.0 6.0 180 6.0 260 10.0 1.5 (1.1) 3.0 (2.0) 15 KBWT-110 8603 115 15.0 10.0 90 8.5 130 17.0 1.2 (.9) 2.0 (1.5) 20 KBWT-112 8612 115 18.0 12.0 90 10.5 130 25.0 1.5 (1.1) 2.5 (1.9) 25 KBWT-210 8610 230 15.0 10.0 180 8.5 260 17.0 2.2 (1.7) 4.0 (3.0) 20

Maximum DC Output Current

Continuous Duty Rating

AmpsDC@ Output

Voltage

Current Limit

Max. Setting

(Amps DC)

Maximum Motor Horsepower (KW)

Continuous Duty Intermittent Duty

(1 min)

Armature

Fuse Rating

(Amps)

(Optional)

0.250 [6.4]

6.500

[165.1]

NOTE: MAXIMUM HEIGHT IS:

1.425 [36.2]

1.125 [28.6]

REF

0.190 [4.8]

GND

2.000

[50.8]

7.000

[178.0]

0.310 [8.0]

0.190 [4.8]

KBWT-16, 26

4 PL.

6.500

[165.1]

KBWT A57270

ARMATURE

AC LINE

INPUT

ARMATURE FUSE

LED

CL MAX

MECHANICAL SPECIFICATIONS

INCHES

[mm]

KBWT-110, 112, 210

5.000

[127.0]

4.250

[108.0]

A+ A- L1

D25

D24

SCR2

SCR1

PWR ON

LED

I2 I1

V+IR

P1P2P3

MIN

DWG#: C4100-1-00988 DWG#: B4500-1-00935

6.750

[171.45]

4.250

[107.95]

A+ A-

ARMATURE FUSE

LED

CL MAX MIN

I2 I1

1.250

[31.75]

KBWT A57270

PWR ON

LED

V+IR

P1P2P3

6.500

[165.10]

0.250 [6.35]

7.000

[177.80]

CONNECTION DIAGRAM

NOTE: MAXIMUM HEIGHT IS

3.250

[82.55]

A+

ARMATURE

FUSE

LED

CL IR MAX MIN

DWG#: B4500-2-00936

A- L1 L2

I2 I1

V+

PWR ON

LED

P1P2 P3

KBWT A57270

MAIN SPEED POTENTIOMETER (5K)

KB ELECTRONICS, INC.

12095 NW 39th Street, Coral Springs, FL 33065-2516 (954) 346-4900 • FAX (954) 346-3377 Outside Florida Call TOLLFREE (800) 221-6570 www.kbelectronics.com

Rev.______(A_______)