Enhanced Direct Torque Control of Induction Motors Using Constant Switching Frequency Torque Controller and Fuzzy Logic Control
Main Article Content
Abstract
The Direct Torque Control (DTC) methods for AC machines are commonly utilized in many variable-speed drives, especially in cases where torque control is more desired than speed control. Two major problems that are usually related to DTC drives are: 1) switching frequency that varies with operating conditions; and 2) high torque ripple. To solve these problems and, at the same time, improve the simple control structure of DTC, a constant switching frequency torque controller is proposed to replace the conventional hysteresis-based controller. The best features of the voltage source inverter (VSI) and the direct current (DTC) method are combined to create the right voltage vectors when the input power factor is 0.9. The results show that the system's dynamic response is of high quality and reliability, and they also show that both steady-state and transient motor ripple torque are kept to a minimum. We suggest a way to use VSI-based DTC in IM drives to choose the right switching vectors for controlling torque with small changes in the stator flux within the hysteresis band. This paper presents a novel control scheme based on a fuzzy logic controller (FLC). This paper reviews the research and development in direct torque control of VSI-fed IM. Such a review helps the highly effective control strategies for AC machines to provide very fast torque and flux control. In this technical context, an overview of VSI-fed induction motors has been carried out based on reports from the literature presented in the past two decades.
Downloads
Metrics
Article Details
You are free to:
- Share — copy and redistribute the material in any medium or format for any purpose, even commercially.
- Adapt — remix, transform, and build upon the material for any purpose, even commercially.
- The licensor cannot revoke these freedoms as long as you follow the license terms.
Under the following terms:
- Attribution — You must give appropriate credit , provide a link to the license, and indicate if changes were made . You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
Notices:
You do not have to comply with the license for elements of the material in the public domain or where your use is permitted by an applicable exception or limitation .
No warranties are given. The license may not give you all of the permissions necessary for your intended use. For example, other rights such as publicity, privacy, or moral rights may limit how you use the material.