50V 20A, Proportional Closed-Loop, Hybrid,
Unidirectional, Motor Controller
Integrated Heat Sink, Digital Feedback Port and with 5kHz or 20kHz PWM, T-Chip
Si5HyUdMCDF1-50V-20A is a 50V 20A,
microprocessor based, Single, Closed-Loop, Hybrid, Unidirectional,
Motor-Controller with an integrated heat sink and with a Digital Feedback port.
This board uses pulse-width modulation (PWM) to efficiently control the
speed of a brush type DC motor (or load current) in open or closed loop control
mode in the 0 to 1000W power range, and in 8.3W steps. The desired control mode
is selected by a jumper (J1M). An open-circuit (no jumper) selects the
open-loop mode, while short-circuit (jumper installed) selects the closed-loop
mode. The desired motor speed (or load current) is set by a (0 to 5V) range
external analog voltage (applied to I1 input pin on port CN4). The
Si18V1RPM-Sens optical interrupter
(connected to port CN3) along with
Si18V1RPM-Wheel optical wheel (mounted on the motor shaft)
provides proportional feedback, keeping the motor-shaft rotating at a constant
speed. The speed-range is adjustable with an onboard 25-turn trim pot in the 50
to 3000 rpm range. This board requires a single 9V to 50V DC power source
(unregulated and unfiltered) at a 0A to 20A current range to operate normally.
An onboard microprocessor generates a 5kHz or 20kHz PWM carrier signal,
controls the load-power (or motor speed) and monitors the sensor inputs. The
PWM carrier frequency is user selectable by the jumper CN4, 20kHz
when CN4 is open and 5kHz when short. The high frequency PWM rate
provides a smooth motor-speed control, and insures a quiet motor environment. As
the name hybrid (Hy) implies, the required motor speed (or PWM
pulse-duration) is derived from a variable analog-voltage (VI1,G),
while the other control-signals are digital. This analog (I1) input is
zener-diode protected. An onboard LED (red) is used to monitor the load-voltage.
A small (2.3”x2.4”x0.45”) finned integrated heat sink is included with mounting
hardware (as shown on the photograph) to operate at 20A or 1000W power levels.
Higher power-levels (50V, 30A or 1500W) can be achieved with more efficient
heat-sinks. Please click on this link and read the
Board Mounting Instructions and Heat Sink Selection Guide. Typical
applications are: DC Motor-Speed Controller, Light-Dimmer with variable delay,
Power Amplifier, SPST Solid State Relay, etc.
A Typical Application of
closed-loop application (shown below) the shaft-speed of a 24V DC Motor is
controlled, with the accessories
The desired motor
speed (or PWM pulse-duration) is linearly adjusted
Si5Pot1-5k accessory (an external 1-turn 5kW
pot); and efficiently
controlling the motor power in the 0 to 1000W range in 8.3W steps.
The DC Motor can be purchased from Bodine,
www.bodine-electric.com ; or from other vendors,
connecting wires to the Motor and the Power Supply must be heavy gauge copper
wire (#12 AWG or heavier) to handle the rated current level. In addition, these
heavy gauge wires act as a heat sink, protecting the board from overheating.
Hybrid Unidirectional Motor
Controller, Heat Sink, Digital Feedback, 1 Load 50V, 20A
1-Turn, Linear Taper, 5kW
Optical Interrupter Assembly with
8" leads and with 3-Pin Molex 22-01-3037 Connector.
PC Encoder Disk, 2" OD,
0.065" thick, with 45 Counting-Hole.
We usually ship in 2-3 business
All Products Are Proudly Made in the USA