products/Si5HyUdMCAF1-50V

Signal Consulting, LLC

Model Si5HyUdMCAF1-50V-20A

Single, 50V 20A, Closed-Loop, Hybrid, Unidirectional, Motor Controller

with Integrated Heat Sink, Analog Feedback Port and with 5kHz or 20kHz PWM, T-Chip

Si5HyUdMCAF1-50V-20A Features:
Power Semiconductors: Two 60A MOSFET
Max. Continuous Current: 20A with Heat Sink Shown
Max. Current for 5 sec: 40A with Heat Sinks Shown
Board's Size: 2.4" x 2.3" x1.9" (6.1cm x 5.8cm x 4.8cm)
Components Type: 100% Solid State, NO Relays

A single DC Motor or Load is controlled by a Pulse Width Modulator (PWM).

PWM carrier frequency is user selectable with a jumper, 20kHz when the jumper is open and 5kHz when closed.

Jumper Selectable Control Modes: Open-Loop Mode (when J1M Open), Closed-Loop Mode (when J1M Short).

The Load-Voltage is adjustable from 0V to Vp with an analog control signal (V_I1,G )or with an internal or external potentiometer.

High Power-Efficiency: 97.5% typical, at 50V and 20A

On Board:
Filter Capacitors
VTS diodes
Snubber Circuit Ready
Voltage Requirement:
A single DC Source Voltage (unregulated) with any voltage value from 9V to 50V (for Vp)

Si5HyUdMCAF1-50V-20A, Spec Sheet (PDF)

The Si5HyUdMCAF1-50V-20A is a 50V 20A, microprocessor based, Single, Hybrid, Closed-Loop, Unidirectional, Motor-Controller board with an Integrated Heat Sink and with an Analog 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. An onboard microprocessor generates a 5kHz or 20kHz PWM carrier signal, regulates the motor speed, controls motor the acceleration/deceleration, 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 desired motor speed (or PWM pulse-duration) is set by a variable analog input-voltage V_I1,G (0 to +5V, applied to pin I1 relative to pin G, on port CN4) providing a smooth motor-speed control from 0 to 100% in 0.833% steps while the other control signals are digital. The user can choose between open-loop or closed-loop modes by short-circuiting or open-circuiting the pins labeled J1M. An open-circuit (no jumper) selects the open-loop mode, while short-circuit (jumper installed) selects the closed-loop mode. In closed-loop mode, the external analog voltage V_F,G (0 to 5V, applied to pin F relative to pin G on port CN3) provides the feedback, keeping the motor-shaft rotating at a constant speed. These two analog input pins (I1, F) are zener-diode protected, each include an integrator with time-constant of 10mSec and can be used with DC or PWM input signal. An onboard LED (red) is used to monitor the load-voltage and an optional, fast-acting 20A Mini-Fuse (with socket) is used for motor/board protection. 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. This board requires a single 9V to 50V DC power source (unregulated and unfiltered) at a 0A to 20A current range to operate normally. Typical applications are: DC Motor-Speed Controller, Light-Dimmer with variable delay, Power Amplifier, SPST Solid State Relay, etc. This board can be configured and programmed to perform efficiently in many customized applications.

A Typical Application of the Si5HyUdMCAF1-50V-20A

In this closed-loop application (shown below), the shaft-speed of a 24V DC Motor is controlled and regulated by the external analog feedback-voltage V_F,G(voltage at F relative to G, on port CN3). While the desired motor speed (or PWM pulse-duration) is linearly adjusted with the Si5Pot1-5k accessory (an external 1-turn 5kW pot); from 0 to 1000W range in 8.3W steps. These two analog voltages (V_I1,G and V_F,G with range of 0 to +5V) are efficiently controlling the motor power and maintain a constant motor speed. The DC Motor can be purchased from Bodine, www.bodine-electric.com ; or from other vendors, http://www.e-motorsonline.com/emotors/dcmproduct_list.php .

Warning: The 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.