ISA Interchange

Welcome to the official blog of the International Society of Automation (ISA).

This blog covers numerous topics on industrial automation such as operations & management, continuous & batch processing, connectivity, manufacturing & machine control, and Industry 4.0.

The material and information contained on this website is for general information purposes only. ISA blog posts may be authored by ISA staff and guest authors from the automation community. Views and opinions expressed by a guest author are solely their own, and do not necessarily represent those of ISA. Posts made by guest authors have been subject to peer review.

AutoQuiz: Why Must Voltage Be Reduced Along with Frequency in a Variable Frequency Speed Controller?

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Joel Don

Joel Don

Joel Don is an independent content marketing, social media and public relations consultant. Prior to his work in marketing and PR, Joel served as an editor for regional newspapers and national magazines throughout the U.S. He earned a master's degree from the Medill School at Northwestern University with a focus on science, engineering and biomedical marketing communications, and a bachelor of science degree from UC San Diego.

Recent Posts:

AutoQuiz: Why Must Voltage Be Reduced Along with Frequency in a Variable Frequency Speed Controller?

Joel Don Feb 28, 2020 12:42:16 AM

AutoQuiz: What Process Confirms That a Company Meets the Needs of Customers and Complies With Statutory and Regulatory Requirements?

Joel Don Feb 21, 2020 12:42:00 AM

AutoQuiz: What is “Slip” in an AC Induction Motor?

Joel Don Feb 14, 2020 12:42:57 AM

AutoQuiz: What Factors Affect the Reynolds Number for a Flowing Fluid?

Joel Don Feb 7, 2020 12:42:28 AM

AutoQuiz: Identify Three Levels Within the Manufacturing Computer Systems Hierarchy

Joel Don Jan 31, 2020 12:42:32 AM

AutoQuiz: What Are the Limitations of an Analog Multimeter?

Joel Don Jan 24, 2020 12:42:28 AM

AutoQuiz: How Are the Maintainability and Maintenance of Automation Systems Related?

AutoQuiz is edited by Joel Don, ISA's social media community manager.
Joel Don Jan 17, 2020 9:00:41 AM

AutoQuiz: How to Use the Parity System to Detect Data Transmission Errors

AutoQuiz is edited by Joel Don, ISA's social media community manager.
Joel Don Jan 10, 2020 9:00:59 AM

AutoQuiz: What Electrical Event Can Occur With a 24 VDC Open-Collector Output Sinking Configuration?

AutoQuiz is edited by Joel Don, ISA's social media community manager.
Joel Don Jan 3, 2020 9:00:07 AM

AutoQuiz: What Device Is Used to Convert an Analog Signal From a Transmitter to the Signal Required by a Digital Controller?

AutoQuiz is edited by Joel Don, ISA's social media community manager.
Joel Don Dec 27, 2019 9:00:52 AM

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      The International Society of Automation (ISA) is a non-profit professional association founded in 1945 to create a better world through automation. ISA advances technical competence by connecting the automation community to achieve operational excellence and is the trusted provider of standards-based foundational technical resources, driving the advancement of individual careers and the overall profession. ISA develops widely used global standards; certifies professionals; provides education and training; publishes books and technical articles; hosts conferences and exhibits; and provides networking and career development programs for its members and customers around the world.


      The material and information contained on this website is for general information purposes only. ISA blog posts may be authored by ISA staff and guest authors from the automation community. Views and opinions expressed by a guest author are solely their own, and do not necessarily represent those of ISA. Posts made by guest authors have been subject to peer review.

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