Signal Consulting, LLC 

Model Si24HyBdMC1-50V-20A-AP1

 Open-Loop, 50V 20A, Hybrid Bidirectional Motor Controller with Active-Low Soft-Start and Soft-Stop Control, AP1 Aluminum Plate as Heat Sink, LCD Port and with 5kHz or 20kHz PWM, Y-Chip





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Si24HyBdMC1-50V-20A-AP1 Features:

Efficient H-Bridge for Bidirectional Current Control
Control Input: Active Low, with Soft-Start and Soft-Stop Motor Control
Max. Current for 5 sec : 40A with AP1 as Heat-Sink
Max. Continuous Current: 20A with AP1 as Heat-Sink

Typical Operating Temperature at 20A: 550C with the Metal Heat-Rings Bolted to the AP1  Heat-Sink, while it is exposed to air at 250C (as shown on photograph).

Two User Selectable PWM Frequency: 5KHz or 20kHz

Two User Selectable Motor Acceleration/Deceleration Modes:  Using a Jumper on Port J1.

LCD Port: For Set and Measured RPM Display, 5V RS232 Serial Interface Standard, 9600 Baud, 1 Start, 8 Data, No Parity, 1 Stop.

Adjustable Load Voltage (RPM): The average Load-Voltage (or motor RPM) is adjustable from 0V to 50V  (or max. value of Vp) in 0.83% steps with external Up/Down RPM Push-Buttons.

High Power-Efficiency: 98.5% typical, at 50V and 20A
Optically Isolated Directional Control Signals 

With AP1 Aluminum Plate as  Heat Sink

Power Semiconductors: Four 90A Hex-MOSFETs
Overall Dimensions: 4.0" x 3.3" x 1.4" (102 x 84 x 34mm).
Components Type: 100% Solid State, NO Relays

On Board:
Filter Capacitors
VTS diodes
Snubber Circuit Ready
  Bicolor LED Indicator,  (red=forward,  green= reverse)

Voltage Requirement:
A single DC Source Voltage (unregulated) with any voltage value from 9V to 50V (for Vp)

Si24HyBdMC1-50V-20A-AP1-SD4-5Y2  Spec Sheet  (PDF)

The Si24HyBdMC1-50V-20A-AP1 is a 50V 20A, microprocessor based, high-power, Hybrid, Bidirectional, Motor Controller with user selectable Soft-Start and Soft-Start features. This controller uses a single (9V to 50V at 0 to 20A) DC power supply to control the speed of a DC motor in forward or reverse direction. An onboard microprocessor generates a 5kHz or 20kHz PWM carrier signal, controls the load-power (or motor speed), controls the load-current rate (or motor acceleration and deceleration), updates the Liquid Crystal Display (LCD) and monitors the user inputs. The PWM carrier frequency is user selectable by the jumper J2, 20kHz when J2 is open and 5kHz when short. This high frequency PWM rate insures a quiet motor environment. The user can choose between slow or fast motor acceleration/deceleration modes by short-circuiting or open-circuiting the pins labeled J1.  The slow mode, with rise-time/fall-time of 1.25Sec, is selected by short-circuit (J1 jumper installed); while the fast buildup mode, with rise-time/fall-time of 0.05s, is selected by leaving these pins open (no Jumper installed). As the name hybrid (Hy) implies the required motor speed (or PWM pulse-duration) is variable from 0 to 100% in 0.83% steps using the analog voltage (VI1,G=0V=0%PWM, VI1,G=+5V=100%PWM,), while the motor direction is selected using two active low digital (0 to +5V) control signals (VF,N  and VR,N) or switches.  All inputs are optically isolated or zener-diode protected. A bicolor LED is used to monitor the motor (or load) voltage (Red = Forward, Green = Reverse). A serial LCD port (with 5V, RS232 Interface Standard and with back-light) is provided for optional display of motor RPM data with a 2 line by 16 character format. A small (4.0”x3.3”x0.062”) AP1 Aluminum Plate heat-sink is used to operate at 20A current levels. Higher current-levels (25A or 1200W) 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 operates in a wide voltage-range (9V to 50V) at max. continuous load current of 20A. Typical applications are: Bi-directional DC Motor-Speed Controller, Peltier Effect TE Coolers, Heat Pumps, DPDT Solid State Relay, etc. This board can be configured and programmed to perform efficiently in many customized applications.

Motor Control-Action Truth Table, (Pins on Connector CN4)


 The motor action or load-current direction is controlled by active low control inputs, (0 to +5V) applied to Pin F (Forward) and/or pin R (Reverse) relative to Pin N (Neutral) on the Connector CN4. These pins are optically isolated from the H-Bridge, providing good noise immunity for these inputs. The control actions and the required voltage levels are defined by the Truth-Table listed above. All control lines (analog and digital) are sampled approximately at 80Hz rate in the fast mode (J1 jumper open), and at 8Hz rate in the slow mode (J1 jumper short).

LCD Port CN2:  An optional 2-Line by 16-Character serial LCD (Si14LCD2L16CH-4PC) can be connected to port CN2 to display set and measured % PWM. This +5V, RS232 serial LCD operate at: 9600 Baud rate, 1 Start-Bit, 8 Data-Bits, 1 Stop-Bit, No Parity-Bit.   Display Format:    Line1    Spwm=025.0%        Line 2   Mpwm=+025.0%

A Typical Application of the Si24HyBdMC1-50V-20A-AP1 

In this open-loop application, the PWM or motor speed (in forward or reverse direction) is adjusted by an external linear 1-turn 5kW potentiometer (connected to port CN6, Signal Part number Si5Pot1-5k) and the motor direction is controlled by 4 external switches connected to port CN4 (as shown below). The normally-open switches select the motor direction, while the optional normally-closed limit-switches are included to prevent over-rotation in window-lifting applications. The LCD module can be ordered from Signal with the part number of Si14LCD2L16CH-4PC  (2-Line by 16-Char display with 12” cable, 4-pin connector, and with back-light). Warning:  The connecting wires to the Load 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.

Si24HyBdMC1-50V-20A-AP1  50V, 20A, Hybrid, Bidirectional, Motor Controller Board with AP1 Aluminum Plate  
Price $229.00

Note: If Buying the Si24HyBdMC1-50V-20A-AP1, it is recommended to buy one  Si14LCD2L14CH-4PC Display, and one Si5Pot1-5k Potentiometer.

Si14LCD2L16CH-4PC  2 Line by 16 Character LCD with 12" long cable and 4-pin connector.  
Price $59.00
Si5Pot1-5k  potentiometer with 12" leads.  
Price $15.00

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Availability: We usually ship in 2-3 business days.



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