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What’s the difference between AC and DC drives?

  • 2021-06-28 11:27:20
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When it comes to AC drives vs DC drives, DC drives are commonly considered problematic, despite their prestige for having simple circuits, providing high start-up torque, and being ideal for applications with constant speed due to the requirement of commutators and brush assemblies in their motors. These motors can become worn over time, have operational issues, and will likely require labor to preserve.


On the opposite side of the spectrum, AC drives are considered more energy-friendly and are able to endure rapid speed changes more efficiently due to their running induction motors. Often times, they have hundreds of numerous programmable parameters for secure protection. Although, because of these factors, the AC drive is more complex, modernized software is simplifying their overall use.


In previous years, DC drives were regularly utilized due to their simplicity, the majority of machine manufacturers prefer to use AC drives as of late. The complexity of an AC drive has been repeatedly simplified and fine-tuned, resulting in a plethora of advantages.


Though in the past DC drives were often utilized due to their simplicity, most machine manufacturers now prefer to use AC drives (especially for servo applications). The intricacy of an AC drive has been simplified over time and has many upper hands.


Conclusion

So which would work better for you? When it comes to AC drives vs DC drives, it’s important to keep in mind DC drives’ infamous ability to provide high start-up torque, which makes them ideal for applications that have a constant speed. In comparison, AC drives are generally more energy efficient. They also have running induction motors, and can therefore handle rapid speed changes better than DC drives.



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