We know DC brushed motor is widely used for many different applications; from conveyor, AGV (Automated Guide Vehicle), mobile robot and combat robot. One of the reasons is the ease to use it, just connect the two terminals of motor to power respectively, it will start rotating, so simple. Yet, to control the speed and direction from a controller, a motor driver is needed.

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This is MD30C DC brushed motor driver. It is the successor of MD30B which is designed to drive medium to high power brushed DC motor with output current up to 80A peak (1 second) and 30A continuously. Full NMOS(solid state) design not only provides faster switching time, it is also more efficient and no heatsink or fan is required to get 30A continuous in room temperature.

Besides that, MD30C also incorporates some user friendly features such as reverse polarity protection for Vin/Vmotor and onboard PWM generator which allows it to operate without additional controller. The motor can simply be controlled with the onboard switches and potentiometer. External switches and potentiometer can also be used.

Which motor is good to be driven by MD30C? As long as the motor:

• DC Brushed motor (Two terminals)
• Operating voltage from 5V to 30VDC
• Rated Current ≤ 30A
• Peak Current ≤ 80A

Example of suitable DC brush motor with MD10C (Not limit to):

• Relatively low current motor: SPG50 series, SPG30 and SPG30E series, IG45 series, IG42 series, IG32 series, DKM 40W series.
• Power Window Motor with coupling, left or right, or Wheel kit
• 350W Electric Scooter Motor
• 450W Electric Scooter Motor with Gear
• DKM 120W series

Features

• Bi-directional control for 1 brushed DC motor, single channel

• Motor Voltage: 5V to 30VDC

• Maximum Output Current: 80A peak (1 second), 30A continuous

• Reverse polarity protection for Vmotor

• 3.3V and 5V logic level input, compatible with:

  • 5V Arduino boards such as Arduino UNO, Maker UNO, CT-UNO, Arduino Mega2650

  • 3.3V Arduino board such as Arduino Zero

  • Raspberry Pi boards which include 3B, 3B+, 3A+, Zero, Zero W, Zero WH

• Full NMOS H-Bridge for higher efficiency and no heat sink is required

• Regenerative Braking

• Brakes the motor when PWM pin is low (logic low)

• Speed control PWM frequency up to 20KHz (Actual output frequency is same as input frequency when external PWM is selected)

• Onboard PWM generator with switches and potentiometer for standalone operation

• Support both locked-antiphase and sign-magnitude for external PWM operation. Note: PWM is not "RC PWM"

Document

• User's manual (Dec 2017)
• Fritzing file, tutorial
• Arduino Library and Example (Github)
• MD30C CE certificate
• MD30C FCC certificate
• MD30C RoHS certificate

Tutorials

• Using MD30C without MCU, standalone operation
• Controlling MD10C with Arduino - You can apply the same connection and program for MD30C.
• Instructables tutorial by randofo - Controlling Motor Speed

Video