콘덴서 운전형 단상유도전동기에서 운전 효율 향상을 위한 보조권선 저항 및 정전용량 산정에 관한 연구

김건태 부산대학교 대학원 2017 국내석사

Single-phase induction motors are mainly used in refrigerators and air conditioners, as a fan or compressor. Recently, due to the rise in oil prices and the lack of energy resources, high efficiency of household and industrial appliances has been seriously considered. Therefore, high efficiency of single phase induction motors has become an indispensable issue. Despite its higher priority, however, there is lack of related researches for the development of high efficiency single-phase induction motor. Based on the accumulated technology, major companies have continuously developed and standardized the single-phase induction motors and gear-head motors of various capacities, occupying the domestic and overseas market with large portion. In this paper, we analyzed the running efficiency according to the auxiliary winding resistance, and measured the capacitance of the single phase induction motor. When confirming the characteristic change due to the auxiliary winding resistance, the 2D FEM analysis was performed after the capacitance was set to 45[uF], for the sake of a reasonable analysis. Characteristic analysis according to capacitance change was also carried out in the same way. We set our main focus on the change of the circularity of the revolving magnetic field and copper loss with the change of two parameters.

캐패시터 시동과 트라이액 시동 단상유도전동기의 운전상태에 관한 연구

姜垣宅 조선대학교 2003 국내석사

This paper presents a procedure to determine a proper firing angle of electronically started single phase induction motors. In addition, the on load induction motor behavior with no load firing angle is investigated. Steady steady and transient operations of a capacitor start and also a triac start single phase induction motor(TSIM) are simulated using Pspice software. The object of this paper is the determination of a proper firing angle of the traic for a TSIM using a simple control circute. This angle is determined in such a way that by approaching the steady state, the auxiliary winding is totally disconnected. This study shows that the specifications of the single phase induction motor and its load are the major factors in defining the proper firing angle of the electronic switches used, and it is different for different moters. Experimental results confirm the Pspice simulation results.

ZVS를 이용한 단상유도전동기의 기동특성에 관한 연구

김동수 목포대학교 산업기술대학원 1998 국내석사

본 논문은 단상 유도전동기의 입력전류를 위상제어 IC인 TCA 785로 전동기의 기동에서 운전시까지 제어하였다. 또한, 제안한 구동시스템과 기존 원심력스위치를 이용한 단상유도전동기를 시뮬레이션과 실험을 통해서 비교분석 하였다. In this paper, the input current of Single Phase Induction Motor ws controlled from stating to running by a small phase controller TCA 785. The Simulation and experimental results show the motor of the proposal system and are compared with centrifugal switch starting motor.

단상유도전동기의 보조권선 위상각제어에 의한 속도-토크제어

장학충 全南大學校 1993 국내석사

현재 가정이나 사무실에서, 단상유도전동기를 사용하고 있는 응용기 기들에는 점차 연속적인 가변속성능이 요구되고 있다. 그에 따라 고도의 토크제어능력이 절실히 요망된다. 일반적으로 단상유도전동기의 속도제어는 탭변화, 극수변환 또는 기어등의 사용에 의한 비효율적이고 복잡한 방법들이 이용되고 있다. 이러한 방법에 의한 단상유도전동기의 속도제어기는 불연속적이고 제어성능과 신뢰성이 낮을 뿐만아니라 제작이 복잡하고 제어기의 부피가 커지는 단점을 가지고 있다. 따라서 본 연구에서는 단상유도전동기의 보조권선 전압위상각을 제어함으로써 토크를 연속적이고 정확하게 조절할 수 있는 토크제어기를 제안하였다. 본 제어기의 실현을 위해 보조권선의 전압위상각과 발생 토크 사이의 관계에 대해 고찰하였고 컴퓨터를 통해 시뮬레이션을 수행하였다. 그리고 전압위상각제어에 의한 토크제어기를 설계 제작하여 실험을 통해 제어기의 가변토크성능을 조사하였다. 실험결과 본 제어기에 의한 최대토크와 기동토크가 표준 콘덴서운전형에 비해 현저히 증가하였다. The single-Phase induction motor are widely used in many light duty applications, especially in home and the office. Recently, many applications which use these motor require continuously adjustable speed control. In general, the speed control of single-phase induction motor is accomplished at a few discrete speeds by using tapped-windings, pole switching or gear. These techniques are inefficient and complicated. In this paper, control techniques by adjusting voltage phase angle of auxiliary winding in a single phase induction motor is proposed in order to adjust the speed. The relationship between the auxiliary winding voltage phase angle and torque is investigated theoretically with simulation. And a controller to adjust the voltage phase angle is designed to accomplish the desired torque control Experimental results were excellently agreed with the theory and simulation. And the starting torque and maximum torque magnitude could be increased compare with standard capacitor-run configuration.

토폴로지별 단상유도전동기의 전자식 기동기 특성

서강성 朝鮮大學校 大學院 2002 국내석사

Single phase induction motor(SPIM) is one of the most widely used type of low power AC motors in the world, especially for domestic or commercial applications where a three phase power supply is not available. Fractional horse power single phase induction motors have no starting torque their own. So there are several ways of starting single phase induction motors. The most common type is the starting capacitor installed in series with the auxiliary winding to increase the starting torque. Also, the auxiliary winding is disconnected once the speed of the motor reaches 70 to 80[%] of the rated speed. In the conventional systems, this function is conducted by a centrifugal switch. But the mechanical centrifugal switch has many problems such as switch malfunction. This paper presents the new methods of electronic starting switch by topologies to overcome these shortcomings of centrifugal switch.

위상제어에 의한 단상유도전동기의 에너지절감에 관한 연구

박수강 朝鮮大學校 2003 국내박사

The three-phase induction motor is rugged, reliable, long-lived, self-starting, smooth-running. But it is relatively inexpensive and three-phase power in not available everywhere, so if possible we need single-phase motor with the same characteristics. In fact, single-phase induction motors have excellent characteristics and outnumber the three-phase variety. Most of the small electric motors used in home, farm, or office are single-phase induction motors of one type or another. This electric motors application field need most energy saving type drive according to enlargement of electronic goods and to tend high class. This paper describes the energy saving of the single-phase induction motor by phase angle control method. The proposed methods are based on the optimal efficiency control which is running by variable phase angle of main winding current to maintain the maximum efficiency characteristics of the motor, in voltage control with TRIAC. Also, an auxiliary winding was controlled by electronic starting switch. During an AC motor's start-up accelerating period, a large amount of current is required to reach to the rating speed. This is called in-rush current. This peak in-rush current can be more than about several times the operating or steady-state current in the full load rating of the motor. In-rush current is presented in both and electronic ballasts. The main area of concern is the tripping of circuit breaker and fuses which can affect electrical system components. From this, we can see that the electrical power controllers will be rather concerned, since they have to supply the actual current necessary to start the motor. This paper presents a new method to reducing in-rush current and energy saving of the single-phase induction motor used in air-conditioner. It can be obtained that proposed system is low cost and small size as compared with other controller. Experiments are focused on a capacitor starting single-phase induction motor. The optimal power saving and in-rush current limiting by phase angle control are verified by experimental results. In this paper, an auxiliary winding driving system of the single-phase induction motors is described. A variations of starting time are obtained by controlling the auxiliary winding voltage magnitude and phase angle, while the motor's main winding is directly connected to the local utility. The voltage phase angle of a variable auxiliary winding is shown to yield significant torque control, providing starting and braking torque. The analysis includes the determination of the relationship between the auxiliary winding voltage phase angle and the phase angle difference between the main and auxiliary winding current. This paper is proposed for adjusting an auxiliary winding voltage magnitude and phase angle. The starting characteristics of single-phase induction motor using PWM inverter for auxiliary winding voltage supply are shown in experimental results. The driving system is tested using a dynamometer to experimentally verify the results of the theory. Conclusively, a various phase control methods for energy saving of singlephase induction motor are proposed. The controllers that are embodied by each method can use by various usage according to each performance and it is considered that application may help in the electrical energy saving because is possible to other electrical appliances.

改良型 브리지 다이리스터 인버어터를 사용한 單相誘導電動機의 가변 주파수 速度制御

신민섭 漢陽大學校 産業大學院 1981 국내석사

단상유도 전동기의 Soft Starting을 위한 초기기동 및 정상상태 운전을 위한 제어 알고리즘 개발

김해진 부산대학교 대학원 2019 국내박사

본 논문에서는 PWM 인버터를 사용하여 단상유도 전동기의 기동전류를 제어하는 Soft Starting 알고리즘을 제안한다. Split-Phase, Capacitor-Start, Permanent-Split Capacitor(PSC) 및 Capacitor-Start Capacitor-Run(CSCR)과 같은 전통적인 유도전동기의 기동방식은 기동을 위한 시스템 결정시 선정된 하드웨어로 기동전류가 정해지는 시스템 구조로 인해 기동전류의 크기를 제어할 수 없다. 따라서 본 논문에서는 비례(PR, Proportional Resonant) 전류제어기를 활용하여 기동전류의 크기와 기동시간을 줄이는 Soft Starting 알고리즘을 제안하였다. 또한 초기 기동 후에 정상상태 동작 시 CVCF(Constant Voltage Constant Frequency)로 운전할 수 있는 모드전환 알고리즘을 제안하였다. 제안된 Soft Starting과 모드전환 알고리즘은 실험을 통하여 그 효율성을 검증하였다.

단상유도전동기 Soft-Start를 위한 구동시스템의 구현

성경민 조선대학교 1996 국내석사

A Single phase induction motor is the predominant fractional horsepower power rating, extensively used in domestic and industrial applications. For example, these motors provide the motive power to washing machines, fans, refrigerators, etc. A new method to start smoothingly a single phase induction motor by using a TRIAC is presented in this paper without the centrifugal switch. Solid state soft starters based on TRIAC's often used to decrease the starting current of the single phase motors. However, the capacitor-start single phase induction motor using centrifugal or relay switch is one of the most widely used of all the types of single phase motors. In this paper, single phase induction motor input current was detected by a small current transformer and determined TRIAC gate signal by using opamp analog circuit. The soft-start strategy is based on limited auxiliary current angle during starting period in the closed-loop control. The simulation and experimental result show the motor's starting characteristics of the proposal starting system and are compared with centrifugal switch starting motor.

마이크로컨트롤러를 이용한 단상유도전동기의 기동 성능 개선

金昌柱 조선대학교 2003 국내석사

The single phase induction motor(SPIM) with two windings, main and auxiliary, is probably the most widely used motor in the world due to their ruggedness, low maintenance and simplicity of construction. There are several ways of starting SPIM. The most popular arrangements is centrifugal switch. An auxiliary winding connected in series with a capacitor, is brought into the circuit during starting. The closing and opening time of switch to separate auxiliary winding with main circuit is dependent on the speed of motor. But it also has many shortcoming such as random switching, arcing. Those effects might cause the switch to fail to operate normally and there are many drawbacks inherent in the operation of these switch. This paper presents the new methods of starting switch by microcontroller to overcome these problems of centrifugal switch.