scholarly journals Modulation index effect on inverter based induction motor drive

2020 ◽  
Vol 11 (4) ◽  
pp. 1785
Author(s):  
Akhilesh Sharma ◽  
Anandh N. ◽  
Sarsing Gao
Keyword(s):  
Induction Motor ◽  
Closed Loop ◽  
Modulation Index ◽  
Motor Drive ◽  
Conduction Time ◽  
Induction Motor Drive ◽  
Efficient Design ◽  
Power Switching ◽  
Index Effect ◽  
Selection Of

Due to a substantial increase in the use of inverter for numerous electrical appliances starting from domestics to industrial drives, an inverter may be directly connected to the power grid system. The dependency on an inverter has been increased over the years. Hence, the proper and efficient design of the inverter will lead to higher efficiency. One of the major challenges is the generation of suitable gate pulses for power switching devices, which in turn depends on the modulation index. The selection of proper modulation index will help in the production of the rated voltage. If the modulation index is less, the duration of on-time pulses will be less and hence, the device's conduction time is also less, thereby the output voltage of the inverter is reduced. A reduced voltage, when applied to an induction motor will have lower speed and even its performance will be sluggish. The speed of the motor improves when it is operated in a closed-loop for the same modulation index. This research paper tries to bring out the effect of modulation index on speed control of an induction motor based on an inverter for both open as well as closed-loop operation. The simulated results indicate that the modulation index in the vicinity to unity will provide rated voltage for the smooth operation of the motor.

scholarly journals Performance Comparison of Multilevel Inverter Topologies for Closed Loop v/f Controlled Induction Motor Drive

2017 ◽  
Vol 117 ◽  
pp. 958-965 ◽  
Author(s):  
A Chitra ◽  
Razia Sultana. W ◽  
J. Vanishree ◽  
S. Sreejith ◽  
Sherin Jose ◽  
...  
Keyword(s):  
Induction Motor ◽  
Closed Loop ◽  
Performance Comparison ◽  
Multilevel Inverter ◽  
Motor Drive ◽  
Induction Motor Drive

Real-time simulation for performance evaluation of bidirectional quasi z-source inverter based medium voltage drives

2016 ◽  
Vol 35 (3) ◽  
Author(s):  
H. Prasad ◽  
T. Maity
Keyword(s):  
Real Time ◽  
Induction Motor ◽  
Power Supply ◽  
Design Methodology ◽  
Closed Loop ◽  
Voltage Sag ◽  
Motor Drive ◽  
Induction Motor Drive ◽  
Medium Voltage ◽  
Time Simulation

Purpose Purpose – This paper presents the performance of medium voltage induction motor drive fed through a bidirectional quasi z-source inverter (BQ-ZSI). By controlling the shoot-through duty ratio, BQ-ZSI is able to produce desired stable ac output voltage even during the situation of critical power supply variation. BQ-ZSI based drive has unique properties like boosting the output voltage during voltage sag, reducing harmonic distortion and improving the input power factor. Generally, adjustable speed drives (ASD) are interrupted due to voltage sag in input supply that causes manufacturing and commercial losses. Replacing the conventional converter with BQ-ZSI, it can eliminate those common operational constraints. Design/methodology/approach This purpose is validated through simulations using real-time digital simulator (RTDS). RTDS is based on FPGA that interfaces the digital and analog I/O ports of the external hardware device. The IGBT based BQ-ZSI closed loop induction motor drive is modelled in SIMULINK and analysed through state space averaging technique. The suitable controllers are assigned and implemented on FPGA. The performance of the whole system is executed by offline simulation and analysed in hardware-in-loop (HIL) real time simulator with fixed-time step. HIL simulation plays important role in design and development stage for BQ-ZSI based medium voltage drives where virtual plant is executed instead of physical plant. Findings Real-time simulation results show the performance of 225KW, 3.3KV induction motor for BQ-ZSI based motor drive under both steady state and dynamic conditions. The applied closed loop control method provides nearly zero steady state speed error at any operating frequency. Originality/value The application of BQ-ZSI is explored for medium voltage drive to solve the issues of power supply quality through the design of suitable control solution. Performance results presented in this paper can help in development of simple and low cost prototype controller for the drive.

Computer-Controlled Induction Motor Drive for Teaching Purposes

1993 ◽  
Vol 30 (1) ◽  
pp. 77-87
Author(s):  
J. F. Gieras ◽  
H. H. Buhlmann
Keyword(s):  
Induction Motor ◽  
Digital Computer ◽  
Closed Loop ◽  
Motor Drive ◽  
Induction Motor Drive ◽  
Variable Speed ◽  
Variable Speed Drive ◽  
Squirrel Cage ◽  
Load Characteristics ◽  
Computer Controlled

Computer-controlled induction motor drive for teaching purposes A digital-computer-controlled variable-speed drive with 1.5 kW induction motor has been designed. The commercial squirrel cage as well as solid steel rotors have been applied. The load characteristics for speed control (open and closed-loop) have been presented and discussed.

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