VFD Minimum Speeds: How Slow Can You Safely Run Your Motor
In this episode, we dive into the critical topic of VFD (Variable Frequency Drive) minimum speeds and uncover common misconceptions about how slow you can run your electric motor.
Keith from eMotors explains the importance of maintaining proper motor cooling, the limitations of TEFC motors, and why operating at speeds below a 4:1 ratio (15Hz) can lead to motor damage.
Learn about the ideal speed ratios, the importance of Vector Control VFDs for low-speed applications, and how to ensure your motor’s longevity and efficiency. If you have any questions or need further assistance, leave a comment or contact us at eMotors Direct. Don't forget to like, subscribe, and hit the notification bell for more expert insights!
00:00 Introduction
00:30 Why do motors have minimum speeds?
01:08 How slow can you run a motor on a VFD?
01:29 Minimum motor frequency (Hz)
01:48 Vector duty motor turndown ratio
02:30 Handling frequent starts and stops
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