Future trends in adjustable speed drives
Adjustable speed drives are an evolving technology stimulated by the demand for improved process control and tempered by environmental conditions--an evolution controlled by the dynamics of electrical power, power devices and traditional control methods. How these factors interact controls future trends and product offerings for a variety of adjustable speed motor controllers. With the topic of adjustable speed motor controllers` a reasonable place to start would be with the motor. Although many types of motors can be used for variable speed applications, this paper will focus on the ac motor and the electronic controllers associated with ac motors. Both frequency and voltage are controllable motor parameters. Controlling either or both can improve the performance of the ac motor within a given application. Each type of controller offers a unique set of advantages and disadvantages, however, the simultaneous control of frequency and voltage provides the greatest benefits. The adjustable speed controller that provides simultaneous control of frequency and voltage for ac motors is the AFD or adjustable frequency drive.
- OSTI ID:
- 160793
- Journal Information:
- Energy Engineering, Vol. 92, Issue 5; Other Information: PBD: 1995
- Country of Publication:
- United States
- Language:
- English
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