What distinguishes fixed speed drives from variable speed drives?

Fixed speed drives are designed to operate at a constant speed, which means that their output speed does not change regardless of the load or input conditions. This characteristic is crucial in applications where a specific speed is required for optimal performance, such as in simple conveyor systems or fans.

In contrast, variable speed drives are engineered to adjust the output speed based on system demands, allowing for greater flexibility and energy efficiency. They are capable of handling varying loads by modulating the motor speed to match the required performance criteria. Therefore, the distinguishing feature of fixed speed drives is their commitment to maintaining a constant speed, which is foundational to their operation and application in specific industrial scenarios.