The latest compact variable speed drives from Vacon offer users the opportunity to make big money and space savings by controlling up to three motors with a single drive. This is achieved by using the company’s PFC (pump and fan control) technology, which is now a standard feature of all drives in the Vacon 10 range.

With PFC enabled, the drive uses its internal PI regulator to control the speed of the first of the three motors to match the demand for pressure, temperature or flow. When the first motor is running at full speed, the drive issues a command for the second motor to start. Similarly, when demand exceeds capacity with two motors running, the drive starts the third.

According to user requirements, the operation of the PFC system can be configured so the same motor is always the lead, or so the duties rotate around the motors to help ensure that they receive the same amount of use.

Vacon 10 drives are said to eliminate unnecessary complexity while retaining all of the features needed for standard applications.