Hello everyone, I would like to express my gratitude to those who can assist me with a coupling issue at our company. We have two DC motors operating in series, with the coupling situated between them. I am seeking guidance on how to determine the appropriate torque capacity for the new coupling. Should I sum the torque requirements of each motor to calculate the overall torque needed for the coupling? These motors are being used for an extruder application. Thank you for your help. - Fabián
Can you provide a diagram showing how to wire two motors in series? This setup is commonly used in various electrical applications and can help increase torque and efficiency.
A visual diagram would greatly aid in understanding the setup. It appears that a double-ended shaft may be required for the first motor. In this scenario, the output shaft coupling on the driven device needs to accommodate the output of both motors. Additionally, the coupling between the motors must be capable of handling the combined load of the second motor and the equipment load.
Could you provide a photograph instead of a sketch?
I am fluent in Spanish.
Please find the attached image of the motors for your reference. Best regards, Fabián.
Hi Fabián, in real-world operations, the maximum torque load of a coupling typically needs to match or exceed the highest torque that either of the connected motors will generate. However, it's crucial to take into account your motors aren't always operating at their maximum torque, but rather at a regular operational torque, which might be significantly less. Additionally, because it's an extruder application, you should also consider the occasional peak torque loads the system might encounter. So, it's advisable to go with a coupling that not only handles the sum of both motor torque requirements at their regular operational levels but has some additional capacity for those occasional peak loads. Hope this helps!
Hi Fabián, in deciding the appropriate torque capacity for the new coupling, you indeed need to consider the output torque of the motors. Generally speaking, you should design your coupling to handle the sum of the torques of the two motors. However, extruder applications can be tricky because they sometimes encounter very high peak loads. In such a case, it might be advisable to provide a considerable safety margin (possibly up to 2x the calculated torque) to ensure reliability. It's also important to make sure your coupling design aligns with the operating speed and service factor. Hope this helps.
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Answer: 1. How do I calculate torque capacity for a coupling in a DC motor series setup? - To calculate the torque capacity for the coupling in a DC motor series setup, you may need to sum the torque requirements of each motor to determine the overall torque needed for the coupling.
Answer: - When determining the appropriate torque capacity for a coupling in a DC motor series setup, factors such as the torque requirements of each motor, the application (e.g., extruder application), and any safety margins should be taken into consideration.
Answer: - While there may not be specific guidelines for selecting a coupling for DC motors operating in series, it is generally recommended to consider factors such as torque capacity, misalignment compensation, and the specific requirements of the application to choose an appropriate coupling.
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