I am looking for a brushed DC Motor Controller that is not braking the Motor when the duty cycle is 0. So far I only found this one with the described functionality:
Pololu 18v7 5.5-30V, 7A Motor Controller
Product Code : RB-Pol-119
The Problem is that this Driver uses Serial communication instead of external PWM Control. Is there a DC Motor Driver with external PWM Control, 15A Peak current and “full coast” when off functionality available?
Thank you,
Florian
Hi,
Most H-Bridge motor control circuits uses either one of the 2 types of PWM operations (or both), which are :
]Sign Magnitude PWM : 2 control signals are used to control the speed and direction of the motor. PWM from the microcontroller goes to the PWM pin to control the speed while DIR pin is used to control the direction of the motor. 0% duty cycle will brake the motor./:m]
]Locked Antiphase PWM : only 1 control signal is needed to control the speed and direction of the motor. PWM pin is connected to logic high while the DIR pin is connected to a PWM signal. When the PWM signal has 50% duty cycle, the motor stops rotating. If the PWM has less than 50% duty cycle, the motor will turn CW (or CCW depending on the connection). If the PWM signal has more than 50% duty cycle, motor will turn CCW (or CW depending on the connection)./:m]
The Cytron 13A, 5-25V Single DC Motor Controller can do both Sign Magnitude PWM and Locked Antiphase PWM.
For more information, please take a look at these links :
]Lock Anti-Phase Drive/:m]
]Sign-Magnitude Drive/:m]
Regards,
