Pololu High Power Motor Controller
with Feedback
The SMC04 high-power motor controller with
feedback has multiple interface and feedback options that simplify
servo control of commonly available DC motors. The module features
three independent interfaces: a serial protocol for
microcontroller-based applications, a pulse-width interface for
connection to hobby radio control equipment or serial servo
controllers, and an analog voltage interface for simple tests and
demonstrations. Two feedback alternatives allows for closed-loop
control of position or speed. The SMC04 is higher-current version of
our 3-A motor controller with feedback that can handle larger motors
with its VNH3SP30 motor driver chip, which is also available by
itself and on a carrier board. |
 |
The SMC04 motor controller distinguishes itself from other devices in its
class by offering a complete feedback-based solution for applications
requiring bi-directional, closed-loop control. The user can select either an
analog voltage feedback or a digital encoder feedback (quadrature encoding
is not supported). With the two feedback alternatives, various simple
devices such as potentiometers can be used as sensors to achieve position or
speed control.
In a typical application, a user first sets up the motor controller's
parameters based on the physical properties of the mechanical system that is
being driven. A feedback potentiometer is coupled to the mechanism output,
and the user can then send position commands to the motor controller, which
automatically drives the motor to reach the position. Alternatively, the
mechanism and sensor can be arranged to provide speed feedback, in which
case the motor controller maintains given speeds despite fluctuations in
friction or supply voltage.
The motor controller measures 2.475" x 1.175" and has an operating voltage
of 6–18 volts, making the device well-suited for medium-sized robots and
other projects powered by rechargeable 7.2 V or 9.6 V battery packs or 12 V
lead-acid batteries. The motor controller serial protocol is compatible with
other Pololu motion control devices, allowing multiple units to be connected
to a single serial line to control a mixture of motors and hobby RC servos.
Download datasheet
file
|
