Design and implementation of a variable frequency drive for single-phase induction motor
01 Dec 2015-pp 239-242
TL;DR: In this article, the authors proposed a power electronic circuit which can be incorporated with some change in the existing wiring circuit of the refrigerator for variable speed operation of the motor, which can reduce the inrush current during starting.
Abstract: Variable frequency drive of single-phase induction motor can have many potential advantages, like reduced inrush current during starting, high starting torque, possibility of higher efficiency, more tolerant to variation in grid supply voltage etc Many of the existing electrical gadgets use single-phase induction motor of capacitor start / capacitor-run type A typical example is the motor used in household refrigerators In this application the starting torque requirement is high It will be good if the motor starts with reduced inrush current and if the amount of cooling by refrigerator is controlled by variable speed operation of the motor This work proposes a power electronic circuit which can be incorporated with some change in the existing wiring circuit of the refrigerator
TL;DR: In this study, the performance of fault tolerant single-phase capacitor start capacitor run induction motor powered using seven-level quasi-impedance source inverter (qZSI) is analysed and proposed control algorithm with RL load is discussed.
Abstract: In this study, the performance of fault tolerant single-phase capacitor start capacitor run induction motor powered using seven-level quasi-impedance source inverter (qZSI) is analysed. The seven-level inverter consists of three units of qZSI connected in cascade. When one of the qZSI module fails (due to semiconductor failure), the resultant rms voltage applied to the motor will be reduced by one-third. This leads to reduction in both mechanical speed and electromagnetic torque of the motor. To restore the performance of the motor to pre-fault condition, the voltage deficit must be compensated. In conventional CHB inverter, it is not possible to achieve the pre-fault voltage. However, in qZSI, it is possible to achieve required voltage boost by application of shoot through duty cycle. Here, voltage of other two healthy operating modules can be boosted to reach pre-fault inverter output voltage during post-fault condition. The maximum voltage boost achievable is limited by the maximum shoot-through duty cycle which is related with modulation index. To verify the concept, simulation results of single-phase capacitor-start capacitor-run induction motor with or without proposed control algorithm are discussed. Experimental results for the proposed algorithm with RL load are discussed.
Cites methods from "Design and implementation of a vari..."
18 May 2021
TL;DR: A comparative study of brushless DC and switched reluctance motor drives that are suitable for range hood applications is presented in this paper, where a cost comparison is performed to determine a benchmark for engineers to start design and manufacture process.
Abstract: This paper presents a comparative study of the brushless DC and switched reluctance motor drives that are suitable for range hood applications. The objective is to assists engineers in designing new motor drives for home appliances. Summary of principle and optimal design procedure of these motor drives are provided in this paper. Since, home appliances have competitive markets, total cost is playing an important role in their sales. Hence, selecting proper motor drives structures in terms of price and efficient operation is crucial. A comprehensive electromagnetic comparison is discussed to validate motor drives operations. Moreover, a cost comparison is performed to determine a benchmark for engineers to start design and manufacture process.
26 Jul 1989
TL;DR: In this paper, the authors present a simulation of power switch-mode converters for zero-voltage and/or zero-current switchings in power electronic converters and systems.
Abstract: Partial table of contents: Overview of Power Semiconductor Switches Computer Simulation of Power Electronic Converters and Systems GENERIC POWER ELECTRONIC CIRCUITS dc--dc Switch-Mode Converters Resonant Converters: Zero-Voltage and/or Zero-Current Switchings POWER SUPPLY APPLICATIONS Power Conditioners and Uninterruptible Power Supplies MOTOR DRIVE APPLICATIONS dc Motor Drives Induction Motor Drives Synchronous Motor Drives OTHER APPLICATIONS Residential and Industrial Applications Optimizing the Utility Interface with Power Electronic Systems SEMICONDUCTOR DEVICES Basic Semiconductor Physics Power Diodes Power MOSFETs Thyristors Emerging Devices and Circuits PRACTICAL CONVERTER DESIGN CONSIDERATIONS Snubber Circuits Gate and Base Drive Circuits Design of Magnetic Components Index
"Design and implementation of a vari..." refers background in this paper
17 Jun 2001
TL;DR: In this article, a literature survey of power converter topologies for single-phase induction motor drives is presented, including adjustable frequency PWM inverter and adjustable-speed single phase induction motor drive (SPIMD).
Abstract: This paper deals with a literature survey of various existing power converter topologies, which have been proposed for adjustable-speed single-phase induction motor drives (SPIMD). Included in the paper are several newly proposed power converter topologies. A study of the merit and demerit of different power converter topologies have been carried out. Various converter topologies have been compared in this paper. Among these converter topologies, the adjustable frequency PWM inverter is the best choice for single-phase induction motor drives. However, adjustable-frequency drives have not been widely used with single-phase induction motors. The open-loop constant V/f control law cannot be used with the single-phase induction motor drives as it is used with three phase motors. The variation of the operating frequency at lower speed range with constant load torque causes variation in the motor's slip. A constant V/f control is suitable only over the upper speed range. However, improvements in the low frequency performance require the use of constant power dissipation in the motor. Simulation studies for some of the existing topologies as well as for the proposed ones have been carried out.
"Design and implementation of a vari..." refers background in this paper
12 Jun 2001
TL;DR: A novel vector control system for the single-phase induction motor is proposed and the results prove the excellent characteristics for the dynamic response, which confirms the validity of the proposed system.
Abstract: Until recent years, most of the research into motor drives focused on the high performance drive of the three-phase induction motor, and that of the single-phase induction motor (SPIM) was of little interest. The SPIM is widely used at low power levels because it has simple construction and economic advantage. In general, such machines have both a main and auxiliary winding. Conventionally, these windings are fed by only one single-phase source, and the speed of the motor is not controlled. The SPIM with an auxiliary winding can be treated as an asymmetrical two-phase machine. In this paper, the space vector equivalent circuit of the SPIM is derived. For vector control of the SPIM, the stator current must be decoupled into a flux producing component and a torque-producing component. To accomplish decoupling control, the conventional method requires complex modeling and large computation time. The authors proposed an equivalent circuit referred to the rotor side; in this case, only the stator resistances in the direct axis and the quadrature axis are different from each other and the other parameters are represented to be equal. Thus the decoupling of the stator current is similar to that of the three-phase induction motor. In this paper, a novel vector control system for the single-phase induction motor is proposed. To verify the feasibility of this scheme, experimentation is carried out. The results prove the excellent characteristics for the dynamic response, which confirms the validity of the proposed system.
07 Jul 1997
TL;DR: In this paper, the starting capacitor and the centrifugal switch are removed from a single-phase induction motor and only a running capacitor is used to increase the efficiency and starting torque of the motor.
Abstract: This paper presents a new method to improve the efficiency and torque characteristics of a single-phase induction motor. By using this method, the efficiency and starting torque of the motor are increased. The starting capacitor and the centrifugal switch can be eliminated here. Only a running capacitor is used. A prototype system which consists of some simple hardware circuits and a TMS320C40 digital signal processor system has been implemented. Several experimental results can validate the simulated waveforms. This paper proposes a new direction in improving the performance of the single phase induction motor system.