RC motor control electronics
Work in progress Brushless Controller
Work in progress Tcino 2 - Speed Record Boat
© 2015 - Alessandro Malanca
Uses 3 Radio Channels to drive 2 motors and 2
It uses it uses three radio channels: two to drive the motors and one to drive the two auxiliary channels.
Moving the cloche forward the two motors run forward, moving backward they run backward;
moving the cloche to the right the left motor run forward and the other one backward proportionally,
It uses three radio channels: two to drive the motors and one
to drive the two auxiliary channels.
Moving the cloche forward the two motors run forward, moving
backward they run backward; moving the cloche to the right the left
motor run forward and the other one backward proportionally, and so
Calibration switch to adapt to different radio models (Futaba
Fp tested); calibrated values are saved in internal flash memory; it
is always allowed to reset to the predefined values
Variable frequency PWM according to selected speed (2-8 kHz)
Upon motor rotation inversion an amount of delay at zero speed is applied to stop the motors.
Delayed progressive increment of speed during acceleration.
Invalid radio pulses are recognized and discarded.
Motors are stopped in case radio signal lost.
Ability to eliminate the radio battery using the one of the motors.
If the ratio voltage falls one of the two motors is disabled to maintain the radio functions
(this works best if you use 2 batteries, one for each motor) .
Arming command from the radio upon
power up to keep motor stopped until needed.
Led to indicate zero and full forward/backward radio commands.
Two auxiliary commands one a-stable and the other b-stable (siren, lights, etc. …).
Designed to work at 12 Volts it can handle ( installing adequate heat sink ) till 30 Ampere per motor.
With minor changes to the circuit it can be design to handle up to 90 Volts motors
There is a simpler and cheaper relay version that doesn't uses the H-bridge IC.
It is possible to use it with the Discrete H-Bridge that doesn't uses the H-bridge IC.
Simpler relay version
This is a "simpler" version that does not uses an H-Bridge to invert the engine rotation wise.
The software and the PIC circuit are the same.
If you need to reduce the ON resistance, the circuit shows an option with parallel Mosfets. In the parallel
option, you should use proper clamped Mosfet.
Click here to download the Circad sch file
Discrete components H_Bridge
This is a (never tested) discrete components version of the H Bridge that can be used
with the Twin Controller to drive two brashed engines.
Click here to download the
Circad sch file
© 2013 - Alessandro Malanca