Cana Kit 50A Motor Speed Controller User manual

50A Digital DC PWM
Motor Speed Controller
Control the speed of a DC motor without sacrificing torque.
This Pulse-Width-Modulation (PWM) DC motor controller can
provide up to a maximum continuous current of 50A to your DC
motor or other DC load thanks to a digital microcontroller based
(PIC) design and highly efficient High-Power 202A MOSFET for
cooler operation.
An optional LCD module (LCD1133) is also available
that will precisely indicate the currently set frequency and
duty cycle for accurate control of the PWM signal.
The controller has two modes of operation: Fixed or
Variable frequency. The fixed frequency mode of operation
runs the controller at 100 Hz. In the variable frequency mode of
operation, the frequency is adjustable from 244 Hz to 3.125
KHz. Duty cycle is fully adjustable from 0% to 100% in both
modes.
The controller also offers built-in soft-start feature that
greatly reduces the mechanical stress on the motor as well as
the electrodynamic stress on the attached cables and battery
therefore extending the life span of the whole system. When
power is connected to the circuit, the duty cycle will start from
0% and go up to the preset value in about 1 to 1.5 seconds.
A 12V DC fan is included with the motor controller for robust
reliable continued operation under heavy loads. Please note
that DC fan is only designed to work with a supply voltage of up
to 12V DC.
UK1133
VERSION 2.0
Manufacturer of High Quality Electronic Kits & Modules
Cana KitW
www.canakit.com
1. The controller has two modes of operation: “Fixed” and
“Variable” frequency. You can select between the two
modes depending on the position of the jumper “J1”.
Note that to change from one mode to another, you first
have to disconnect the power supply.
2. In the “Variable” frequency mode of operation you can
press “SW1” to “Lock” the current frequency settings so
even if the potentiometer position is changed the
frequency does not change. To “Unlock” the controller,
simply press “SW1” again. LED “L2” will light up
whenever the controller is “Locked”.
3. Connect the controller to the power supply (9 to 24V DC)
and the load as indicated on the Wiring Diagram. Note
that the fan included with the controller can only be used
with a supply voltage of up to 12V DC. If a higher supply
voltage is used, you need to replace the fan with a fan of
the appropriate voltage.
Operating Instructions
An appropriately rated fuse (rated a little higher than
the maximum current you expect to draw) is required to
ensure safe operation.
The controller is NOT reverse-polarity protected.
Double check all connections before applying power
and always turn off the power supply before making any
wiring changes.
Do not connect the load’s negative terminal to the
power supply ground. The controller switches the
load’s negative terminal to the ground via the MOSFET.
Ensure that the controller’s fan has an adequate
space around it so it can properly flow the air and
provide adequate cooling.
The MOSFET heat sink is electrically live and is
connected to the “M–” terminal. Make sure no wires
touch the heat sink.
Always use the shortest possible length for all wiring
carrying high current to ensure minimal loss. The
longer the wire, the higher the voltage drop across it
which leads to a less efficient overall system.
Make sure all wires marked as “High Gauge” on the
wiring diagram are of the appropriate AWG gauge
depending on the maximum current you expect to draw.
Recommended AWG gauges are as follows:
AWG 14 : 15A AWG 8 : 40A
AWG 12 : 20A AWG 6 : 50A
AWG 10 : 30A
Important Notes
VARIABLE
FREQUENCY
(244 Hz – 3.125 KHz)
FIXED
FREQUENCY
(100 Hz)
V A R F I X
J1
V A R F I X
J1
Manufactured by:
Cana Kit Corporation
#118 – 2455 Dollarton Highway
North Vancouver • BC • V7H 0A2 • Canada
Tel: [phone] • Fax: [phone]
Email:
Web Site: www.canakit.com
[email protected]

Schematic Diagram
Copyright © 1990 – 2010 Cana Kit Corporation
All rights reserved
Reproduction without prior written permission is strictly prohibited
Manufactured by:
Cana Kit Corporation
#118 – 2455 Dollarton Highway
North Vancouver • BC • V7H 0A2 • Canada
Tel: [phone] • Fax: [phone]
Email:
Web Site: www.canakit.com
[email protected]
Wiring Diagram
HIGH GAUGE WIRE
12V
+_
LOAD
LOCK
LED
POWER
LED
OPTIONAL LCD DISPLAY MODULE
(LCD1133)
0.5A CONTROLLER
PROTECTION FUSE
OPTIONAL REMOTE
ON/OFF SWITCH
LOCK SW
FUSE
POWER SUPPLY
Cana KitW
www.canakit.com