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Variable-frequency drive

About: Variable-frequency drive is a research topic. Over the lifetime, 837 publications have been published within this topic receiving 5691 citations. The topic is also known as: VFD.


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01 Jan 2013
TL;DR: In this article, the performance of SVM technique and Sine triangle pulse width modulation (SPWM) technique were compared for harmonics, THD, dc bus utilization and Output voltage and observed that SVM has better performance.
Abstract: The induction motor (IM) is fed from three phase bridge inverter which is operated with space vector modulation (SVM) Technique. Among the various modulation strategies Space Vector Modulation Technique is the efficient one because it has better performance and output voltage is more closed to sinusoidal. The main aim of any modulation technique is to obtain variable output having a maximum fundamental component with minimum harmonics. Space Vector PWM (SVPWM) method is an advanced PWM method and possibly the best techniques for variable frequency drive application. The performance of SVM technique and Sine triangle pulse width modulation (SPWM) technique are compared for harmonics, THD, dc bus utilization and Output voltage and observed that SVM has better performance. These techniques when applied for speed control of Induction motor by v/f method for both open loop and closed loop systems it is observed that the induction motor performance is improved with SVM.
Patent
14 Oct 2015
TL;DR: In this article, a variable-frequency drive parallel control system provided by the present invention comprises a plurality of controllers, wherein each controller is used to control a corresponding variablefrequency drive in a variable frequency drive parallel structure.
Abstract: A variable-frequency drive parallel control system provided by the present invention comprises a plurality of controllers, wherein each controller is used to control a corresponding variable-frequency drive in a variable-frequency drive parallel structure, and comprises a first input interface, a first output interface, a second input interface, a second output interface and a line switching unit. The line switching unit is used to control the first output interface and the second output interface to switch among the following three connection states of a state of connecting the local first input interface, a state of connecting the local second input interface, and a state of both disconnecting with the local first and second input interfaces. The first output interfaces and the first input interfaces of the controllers are connected in series step-by-step to form an inner ring, and the second output interfaces and the second input interfaces of the controllers are connected in series step-by-step to form an outer ring. The variable-frequency drive parallel control system of the present invention has a very strong fault tolerance capability, and also has a very high synchronization precision.
Proceedings ArticleDOI
01 Feb 2020
TL;DR: In this article, the parameter unit and external mode-based speed control of a three-phase induction motor is described using Variable Frequency Drive (VFD) and the Simulink model design of VFD and the waveforms of speed, torque, stator current, line voltages with respect to time are shown.
Abstract: In this paper, the parameter unit (PU) and external mode-based speed control of three-phase induction motor is described. The speed control of the three-phase induction motor is achieved using Variable Frequency Drive (VFD). The basic parameter such as acceleration time, deceleration time, input terminal function assignment, three-speed, and fifteen-speed parameters are explained. The Simulink model design of VFD and the waveforms of speed, torque, stator current, line voltages with respect to time are shown.
Journal ArticleDOI
07 Apr 2021
TL;DR: In this paper, the authors investigated the impact of increasing VFD air conditioner penetration within a power system on FIDVR events, by first modeling variable frequency drive air conditioners as a separate load and then as a power electronic component within the CMPLDW model.
Abstract: Fault induced delayed voltage recovery (FIDVR) is a credible concern in power systems with high penetration of single-phase air conditioner loads. Power system planning studies use dynamic load models, such as the Western Electricity Coordinating Council (WECC) composite load model CMPLDW to examine FIDVR in power systems. The behavior of modern variable frequency drive (VFD) air conditioners to voltage drops is not the same as traditional one- or two-speed air conditioning systems. This paper investigates the impact of increasing VFD air conditioner penetration within a power system on FIDVR events, by first modeling VFD air conditioners as a separate load and then as a power electronic component within the CMPLDW model. Simulation results show that increasing the penetration of VFD driven air conditioners decreases the post-fault voltage sag, recovery time, and number of customers interrupted by undervoltage load shedding.
Journal ArticleDOI
TL;DR: The primary control system was made an automatic Rebung chopper based on the VFD with Arduino Uno, which shows that at a frequency of 20 Hz with a speed of 147.8 rpm, it produces chops with a length of 3 cm in 2 minutes 54 seconds.
Abstract: In chopping Rebung for the home industry, they still use conventional methods and lack the application of technology. This, of course, causes the productivity and quality of the home industry products to be less than optimal. Productivity is influenced by several factors, including requiring workers to be more careful so that it requires a lot of concentration, worker fatigue, which makes it less optimal in using time, and the workers' speed. Therefore, the primary control system was made an automatic Rebung chopper based on the VFD with Arduino Uno. The 3-phase induction electric motor is used as a prime mover for chopping blades and control using VFD (Variable Frequency Drive). For the critical system, use a spring and open the pressing tube's lid using a servo motor and the buzzer as a monitoring medium. The test uses VFD to adjust the rotational speed of the electric motor. The test results show that at a frequency of 20 Hz with a speed of 147.8 rpm, it produces chops with a length of 3 cm in 2 minutes 54 seconds. At a frequency of 35 Hz with a speed of 221.2 Rpm, it produces 2 cm chunks in 1 minute 53 seconds. At a frequency of 50 Hz with a speed of 260.1 Rpm, it produces 1 cm chops in 1 minute 5 seconds. If chopping is done manually, it takes 5 minutes with an average length of 2 cm

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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20239
202220
202143
202084
201956
201887