Hey a question regarding motors, can we connect a DC motor controller (a Kelly controller) to the generator as well as the battery ? So that the controller can draw current from both generator and battery.
Hi Huzaif Khan. I am not sure if I am totally understanding your question correctly. Some motor controllers have a regenerative breaking feature that allows them to utilize the current generated by the motor you are driving when they are suddenly slowed down. It sounds like this is what you are looking for? If you are wanting to attach a battery and an actual generator to a motor controller, just one power source (a battery) would be preferred. Feel free to email us at tech@servocity.com and we'd be glad to help!
Is there a way to have a controller output variable (RNG) speeds? So that say, when applied to a motor, would cause the motor to turn continuously, but at varying speeds.
Absolutely. If you have an Arduino for example, it can communicate with motor controllers via a PWM signal, serial, etc depending on the features available the motor controller. Then the Arduino can adjust the speed however you want. Feel free to reach out at tech@servocity.com should you have any other questions.
Interesting so to have a high tork with the same power you may set the voltage higher, pulse width smaller, and frequency smaller. To have a high speed and less tork, you may reduce the voltage, increase the pulse width and the frequency. I'm not sure... Agree ?
I am assuming when you say " with the same power" in the first sentence you mean "with the same speed"? If so, then effectively yes, since the voltage affects torque AND speed, while the pwm primarily affects speed. If you have two identical motors and motor A is driven with the max spec'd voltage and slowed to 50% via pwm and motor B is driven with 1/2 the max voltage and full or no PWM, then they should both go about the same speed but motor A should be able to deliver more torque. Feel free to reach out tech@servocity.com should you have any other questions.
I have a 350w 24v motor and the motor controller that I have is 36v 500w so is there any problem if I install or connect the motor controller to the motor.?
Generally speaking as long as your motor controller can handle the stall current of the motor and your battery voltage is within the acceptable voltage range of the motor and motor controller then you will be good to go. Let us know should you have any other questions tech@servocity.com. Thank you
Hello Milan, please email Tech@ServoCity.com with your question and some additional details on your application, and they should be able to help. Thank you for reaching out.
"High current" is relative. You can connect more than one motor to a given channel of any motor controller. Just keep in mind that the motor controller will need to be able to handle the stall current of all four motors continuously. You might check out the 2x60A Roboclaw Motor Controller (www.servocity.com/roboclaw-2x60a-motor-controller). With this motor controller, you can bridge the two channels together (the user manual has more info on this) then control the four motors from there. In this configuration, the motor controller can handle 120A continuously and 240A peak. Feel free to reach out should you have any other questions tech@servocity.com.
@@ServoCity In the set up you describe with 2x60A, is it worth putting a circuit breaker between the controller and motor? To avoid a motor drawing more than 120A peak? Based on your explanation in the video, motor doesn't draw the power, its the motor controller that adjusts the PWM signal to the motor. So.. even if its stalled, the motor will neve ask for more current. The user can provide more current by increasing the throttle output on the controller. In this case putting a circuit breaker between motor and controller seems pointless. Am I right?
@@MrCoder101 So current is not pushed, it is pulled. In other words, you could have a battery capable of supplying a million amps of current and connect it to a small LED without blowing out the LED as long as the voltage is correct. The LED will only pull as much current as it takes to run. How much current is flowing through the system can be restricted by a few things though. One is how much current the battery can supply (you can easily "power starve" a battery - in other words it does not have enough capacity to meet the current demand). Another is the load (the motor) - some motors will pull a lot more current than others. When a motor is stalled it is generally pulling as much current as it can. Some motor controllers can do current limiting, which is basically sensing how much current is being drawn and throttling the pwm as needed - although this is generally a feature that needs to be configured. A fuse inline with the motor is not a bad idea as an additional precaution. Please feel free to email tech@servocity.com should you have any other questions. Thank you
