Elliptical space vector PWM for dual H-bridge VSI fed two-phase induction motor drive
01 Dec 2016-pp 1-5
TL;DR: In this paper, the authors proposed a new PWM algorithm for the dual H-bridge voltage source inverter (HB-VSI) targeted at synthesizing an elliptical space vector for driving the unsymmetrical TPIM.
Abstract: Single-phase four-leg variable frequency PWM drives have been traditionally generating balanced two-phase output voltages resulting in a circular space vector trajectory while feeding the two-phase induction motor (TPIM). Keeping in view of the asymmetry in the auxiliary and main windings in the TPIM, this paper suggests output voltages to be generated by the drive in accordance with the windings asymmetry. This paper proposes a new PWM algorithm for the dual H-bridge voltage source inverter (HB-VSI) targeted at synthesizing an elliptical space vector for driving the unsymmetrical TPIM. The elliptical space vector generation is envisaged to minimize the MMF imbalance thus leading to significant reduction in oscillations of the motor electromagnetic torque. Analytical expressions are developed for the dwell-times of the inverter switching devices and the implementation is proven to depend entirely on the instantaneous four phase reference voltages. The proposed PWM algorithm is then simulated using Matlab/Simulink following V/f control in the linear modulation ranges of the drive. The TPIM when excited using the envisaged elliptical space vector shows the improved MMF balance manifesting itself in reduced electromagnetic torque oscillation and reduced speed ripple when compared to the use of circular space vector.
Citations
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TL;DR: In this paper , a cost-effective converter for single-phase machines was proposed to enhance efficiency and reduce energy consumption in retrofit applications, aiming to improve the motor performance and reduce power consumption.
Abstract: This research introduces a cost-effective converter for single-phase machines, aiming to enhance efficiency and reduce energy consumption in retrofit applications. Single-phase motors commonly found in household appliances often suffer from low efficiency, resulting in wasted energy. To tackle this problem, a dedicated converter was proposed to replace the existing capacitors and improve the motor performance. This study presents a proof of concept for retrofit applications, discussing the converter design methodology and prototype evaluation. Additionally, a cost analysis comparing single-phase and three-phase motors is included. It aims to demonstrate the long-term cost savings and improved energy efficiency of the proposed converter. The findings highlight the converter’s potential as a promising solution for enhancing energy efficiency and decreasing costs in single-phase motor applications.
References
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06 Oct 1996
TL;DR: In this article, a novel voltage modulation technique named unified PWM (pulse width modulation) for high performance voltage generation in a voltage-fed inverter is described, which has wide fitness to the general prospect for the loss minimization and the lowest current harmonic with full DC link voltage utilization.
Abstract: In this paper, a novel voltage modulation technique named unified PWM (pulse width modulation) for high performance voltage generation in a voltage-fed inverter is described. As increasing the interest in the high quality power conversion is, a simple PWM scheme that has the wide fitness to the general prospect for the loss minimization and the lowest current harmonic with full DC link voltage utilization is required. From the synthesis of the actual inverter action, a simple but useful concept for the 'effective time' is established. And, fully employing this concept, a new voltage modulation technique for various applications is presented with detailed explanation and actual test results. Implementing this facile strategy to actual fields will result in great reduction of calculation efforts and high applicability including the minimization of switching loss and current harmonics.
298 citations
TL;DR: A model is proposed and used to derive control laws for single-phase motor drive systems and such model is also employed to introduce the double-sequence controller.
Abstract: This paper discusses vector control strategies for single-phase motor drive systems operating with two windings. A model is proposed and used to derive control laws for single-phase motor drive systems. Such model is also employed to introduce the double-sequence controller. Simulation and experimental results are provided to illustrate the operation of the proposed drive systems.
130 citations
TL;DR: The vector control of a single-phase induction motor drive is investigated to implement low-cost systems for low-power applications using field orientation concepts that have been adapted for this type of machine.
Abstract: This paper investigates the vector control of a single-phase induction motor drive to implement low-cost systems for low-power applications. The static power converter side is implemented using a single-phase rectifier cascaded with a four-switch inverter. The vector control is based upon field orientation concepts that have been adapted for this type of machine. Simulation and experimental results are provided to illustrate the system operation.
114 citations
TL;DR: This article focuses on simple space-vector PWM methods for two-leg, three-Leg, and four-leg inverters that can be applied to three phase induction motor drives (TPIM).
Abstract: This article focuses on simple space-vector PWM (SPWM) methods for two-leg, three-leg, and four-leg inverters that can be applied to three phase induction motor drives (TPIM). First, a carrier-based PWM method for a two-leg inverter was proposed on the basis of the conventional SPWM method. Second, a carrier-based PWM method for a four leg inverter that used a double triangular carrier wave was proposed. Third, a carrier-based PWM method for a three-leg inverter was proposed as a replacement for a conventional SVPWM method. Digital calculations using the PSIM software package are performed to investigate the effectiveness of the proposed PWM method
96 citations
"Elliptical space vector PWM for dua..." refers background in this paper
...The 4-leg topology having the highest dc bus utilization and offering decoupled control of both the main and auxiliary windings is reported extensively [2], [3], [4], [11]....
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...The most investigated VSI topologies used in such ASDs are 2-leg, 3leg and 4-leg voltage source inverters [2], [3], [4]....
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...In [3], a double carrier based SVM for this 4-leg VSI is proposed and it also states that simple expressions for the dwell times of the switching devices is difficult and the implementation of SVM is both, complex and also difficult with this modulation....
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01 Nov 1996
TL;DR: In this article, a simple inverter circuit is proposed for driving symmetrical and unsymmetrical two-phase induction motors, where the inverter provides two phases independently controlled variable-frequency variable voltages to the primary and auxiliary windings of an induction motor.
Abstract: A simple inverter circuit is proposed for driving symmetrical and unsymmetrical two-phase induction motors. The inverter provides two-phase independently controlled variable-frequency variable voltages to the primary and auxiliary windings of an induction motor. The dynamic model of the two-phase induction motor driven by the inverter is established. An experimental prototype, which consists of a single-chip microprocessor-based controller, the inverter, and the motor and load, is constructed. Both computer simulation and experimental results show the effectiveness of the proposed inverter-driven motor in achieving higher performance, such as less torque and speed pulsation and reduced vibration and noise, than the conventional motors.
85 citations
"Elliptical space vector PWM for dua..." refers background or methods in this paper
...The most investigated VSI topologies used in such ASDs are 2-leg, 3leg and 4-leg voltage source inverters [2], [3], [4]....
[...]
...The 4-leg topology having the highest dc bus utilization and offering decoupled control of both the main and auxiliary windings is reported extensively [2], [3], [4], [11]....
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...Given the volume of single phase motors installed in the field and the reducing trend in the cost of power semiconductor devices, there has been growing interest in the use of adjustable speed drives (ASDs) for single phase induction motors [2] in the past several years....
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...In [4], a unipolar SPWM technique is reported that has lower voltage harmonics compared to the use of bipolar SPWM reported for 4-leg VSI [2]....
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...Amongst them the most popular 3-leg VSI structure though capable of generating both balanced and unbalanced two-phase output voltages [2], [4], [5], [7] - [9] it suffers from the disadvantage of lower dc-bus utilization as well as the requirement of higher current rating of switches in common leg [10]....
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