|
The Robot Power MegaMoto GTTM is
a low-cost robust H-bridge "shield" for the ArduinoTM and hardware compatible base
units. The built-in cooling fan and heatsinks allow
the MegaMoto GT to handle high current loads
without overheating. Up to 50A (5 sec) of current may be controlled by the MegaMoto GT at 24V. This is over 1200W of power!
The GT is ideal for Arduino users who want to control high
current loads efficiently for robotics, scooters & Segways,
industrial controls and many other applications by using their familiar
development environment and without messy, unreliable "lash up"
type connections to discrete motor controls.
The MegaMoto GT is a dual half-bridge
circuit that can be configured either has a full H-bridge or as two
independent half-bridge circuits. This allows a single MegaMoto
GT to drive one motor with full variable-speed control both forward and
reverse. It also allows two independent motors to be controlled in a uni-directional fashion by connecting one side of each
motor to the battery negative and the other motor lead to one of the MegaMoto GT outputs.
Jumpers are used to select which Arduino signals drive the
Enable and PWM inputs on each MegaMoto. This
flexibility allows the MegaMoto GT to play nice
with other shields which might require the use of certain pins.
Not limited to motors, the MegaMoto
GT can control other DC loads such as lights, solenoids, relays, valves, Peltier junction coolers, Hydrogen generators or
basically any DC device within the operating voltage and current range. 
The MegaMoto GT has the following specifications
and features:
|
Supply voltage
|
6V to 35V (28V max
battery rating)
|
|
Output Current
(continuous)
|
35A
|
|
Output Current
(surge)
|
50A+ 5 seconds
|
|
Weight
|
1.8 0z
|
|
Power MOSFETs
|
2 ea. BTN8982
|
|
PWM Frequency
|
DC to 20kHz
|
|
Logic Interface
|
3V - 5V , minimum
2 pins required
|
|
Logic Inputs
|
Jumper select
Enable and PWM source
|
|
Current Sense
Outputs
|
0.051V per Amp -
2.55V at 50A
|
|
Current Sense Pins
|
Jumper select the
analog input connected
|
|
Current and Temp
Limiting
|
Built into power
chips
|
|
Power Connectors
|
4 each metal screw
terminals for crimp-on "fork" terminals
|
|
Enclosure
|
None
|
Robot
Power offers the MegaMoto GT fully assembled and
tested. Check the Web store for details on prices
and special offers.
|
