Importance

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Abstract

A system is disclosed that is designed to be connected to an electrical power supply. The system comprises a plurality of electric load component comprising stages for cooperatively producing an output (T.sub.out), each stage in a first subset of the stages comprising at least one electrical load component having a first load and each stage in a second subset of the stages comprising at least one electrical load component having a second load, the first load being larger than the second load. The system has a controller for controlling the electrical load components. The controller is designed to estimate voltage variations on the electrical power supply from the switching frequencies of the respective electrical load components during a predefined time frame. The controller further implements an algorithm for adjusting the switching frequencies of the electrical load components having the first load and the electrical load components having the second load in response to the estimation to reduce the voltage variations on the electrical power supply during a next time frame whilst ensuring that the plurality of stages are capable of producing the output (T.sub.out) during the next time frame. The system thus ensures that the amount of flicker generated by the system remains within acceptable limits.

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First Claim