In the past, variable spped control of small chemical feed pumps has been done using DC drives. Lately, we're seeing more AFDs used with standard induction motors. Does anyone have any feelings regarding which of these technologies is more appropriate for chemical feed? DC drives required more maintenance with respect to brush replacement and the related need to stock spare DC motors which were more expensive. I'd appreciate any insight on where the technology is headed now.
Red Flag Submitted
Thank you for helping keep Eng-Tips Forums free from inappropriate posts. The Eng-Tips staff will check this out and take appropriate action.
Reply To This Thread
Posting in the Eng-Tips forums is a member-only feature.
According to Steve Yurek, CEO of the Air Conditioning, Heating and Refrigeration Institute, the HVAC/R industry is facing change on all fronts. This includes challenging trends on contractors and distributors like new refrigerants, growing automation, complex sensors and monitoring, green initiatives and a technician shortage. We look at these trends and outline actionable insights on how it all can be turned into a competitive advantage and business opportunity. Download Now
In this ebook, we'll explore how additive manufacturing is going to transform the way cars are made. This includes commentary from thought leaders such as Ford's CTO, Ken Washington, Customer case studies of ways 3D printing is being used today, and a variety of part examples where 3D printing is already impacting how automobiles are made. Download Now
Learn how Kawasaki optimized automotive and aerospace production processes to save 85% of estimated outsourcing costs by bringing in BigRepâ€™s large-format additive manufacturing systems. And, how efficient workflow and logistical integration helped earn back their investment in just 6 months. Download Now
New technologies and approaches present great opportunities for semiconductor manufacturers to achieve high levels of innovation, yield and improvement. This white paper explores some of these cutting-edge technologies and how they can be applied effectively in the semiconductor industry. Read about how Smart Manufacturing is transforming the semiconductor industry. Download Now