Figure 1. The chart shows energy savings achieved by Refrigeration Service Co. with use of a variable-speed controller. EDITOR’S NOTE: This material was prepared by Heatcraft Worldwide Refrigeration.

Abstract: This paper is to present an advanced hybrid variable speed controller for controlling stand-alone diesel engine driven permanent generator systems to keep voltage and frequency constant and ...

Abstract: This paper focuses on designing a multimodel Linear Quadratic (LQ) controller for variable-speed horizontal axis wind turbines. Those turbines use blade-pitch and electromagnetic torque ...

Pitch-controlled variable-speed horizontal-axis wind turbines (HAWTs) are increasingly being investigated for use in electrical power production. The governing equations of HAWTs are expensive to ...