Signal Consulting, LLC 

Model Si30HyBdMC1-50V-30A-AHC 

50V, 30A, Hybrid, Bidirectional Open-Loop DC Motor Controller, with Integrated Finned Heat-Sink, 7kHz or 14kHZ PWM, Active-High Control Inputs





Buy this Product

Si30HyBdMC1-50V-30A-AHC Features:
Power Semiconductors: Eight 90A MOSFETs
Continuous Current: 30A with Heat-Sink (as shown).
Max. Current for 5 sec: 50A with Heat-Sink ( as shown ).
Load Isolation: The Load must be Isolated from the  Power Source.

Two Motor Acceleration/Deceleration Modes: Using Jumper J1
Two PWM Carrier Frequencies
: 7kHz=J2 short, 14kHz=J2 open.
Motor Directional Control: Active High (10kOhm to Ground, G).
Motor Speed Control : 5k Ohm Analog Pot, 0 to +5V

Load-Voltage Indicator: Bicolor LED.
Worst-Case Control Latency
: 7 micro seconds.
Power-Conversion Efficiency: Approx. 98.5% (at 50V, 30A).
Overall Dimensions : 4.6”x2.43”x2.35”, (117 x 62 x 60 mm).

Load-Voltage Indicator: Bicolor LED.

Onboard 30A Fast Mini-Blade Auto Fuse: Replace, from  DigiKey, Part Number: F6079-ND

Components Type: 100% Solid State, NO Relays

On Board: 
Filter Capacitors
VTS diodes
Snubber Circuit included
Voltage Requirements: A single DC Source (unregulated), any voltage from 12V to 50 Volts

   For Details, Download the  Si30HyBdMC1-50V-30A-AHC-2Y1    Manual


 The Si30HyBdMC1-50V-30A-AHC is a 50V 30A, microprocessor based, high-power, Hybrid, Bidirectional, Motor Controller with user selectable Soft-Start and Soft-Start features. This controller uses a single (12V to 50V at 30A) DC power supply to control the speed of a DC motor in forward or reverse direction. An onboard microprocessor generates a 7kHz or 14kHz PWM carrier signal, controls the load-power (or motor speed), controls the load-current rate (or motor acceleration and deceleration), and monitors the user inputs. The PWM carrier frequency is user selectable by the jumper J2, 14kHz when J2 is open and 7kHz 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 (VP1,G on CN5), while the motor direction is selected using two active high digital (0 to +5V) control signals (VF,G  and VR,G on CN4 ) or switches. The I1 input is zener-diode protected. A bicolor LED is used to monitor the motor (or load) voltage (Red = Forward, Green = Reverse). An LCD port (with 9600 Baud RS232 Standard) is provided for optional display of motor RPM data in a 2 line by 16 character format (on CN3). A small (4.6”x2.5”x1.0”) integrated finned hear-sink is used to operate at 30A current levels. Higher current-levels (40A) 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 (12V to 50V) at maximum continuous load current of 30A. 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.

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


 The motor action or load-current direction is controlled by active high control inputs, (0 to +5V) applied to Pin F (Forward) and/or pin R (Reverse) relative to Pin G (Ground) 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).

Frequency Response of the Si30HFHB-50V-30A-AHC


This plot shows the maximum average load current as a function of PWM carrier frequency (in Hz) at 100% duty-cycle. This plot was obtained with the finned heat-sink (4.6” x 2.4” x 1.0”, as shipped with the unit). Improved performance can be achieved with more effective heat-sinks.

A Typical Application of the Si30HyBdMC1-50V-30A-AHC

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 (Signal Part number Si5Pot1-5k ) and the motor direction is controlled by 2 external normally-open switches connected to port CN4 (as shown below). 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. Note that each connecting point on CN1 is available at 2 places, thus two smaller wires can be used in place of a larger one.

Typical Applications: Bidirectional Speed Controller, Bidirectional DC Motor Driver. Peltier Effect or TE Cells Driver, Heat Pump Controller, PPDT Solid State Relays.

Si30HyBdMC1-50V-30A-AHC  50V at 30A, Hybrid Bidirectional DC Motor Controller with Finned Heat-Sink  and  Active-High Control
Price $279.00

Note: If Buying the Si30HyBdMC1-50V-30A-ALC,  it is recommended to buy  one Si5Pot1-5k Pot

Si5Pot1-5k   One 1-Turn, 5kW Potentiometer with 12" leads .  
Price $10.00

Buy this Product


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



All Products Are Proudly Made in the USA