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속도검출기없는 전압형 Inverter에 의한 유도전동기 속도제어
서영수(Young-Soo Seo),이춘상(Chun-Sang Lee),황락훈(Lak-Hoon Hwang),김주래(Ju-Rae Kim),조문택(Moon-Tack Cho) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
When the vector control, which does not need a speed signal from a mechanical speed sensor, it is possible to reduce the cost of the control equipment and to improve the control performance in many industrial application.<br/> This paper describes a rotor speed identification method of induction motor based on the theory of flux model reference adaptive system. The estimator execute the rotor speed identification so that the vector control of the induction motor may be achieved. The improved auxiliary variable of the two model are introduced to perform accurate rotor speed estimation.<br/> The control system is composed of the PI controller for speed control and current controller using space voltage vector PWM technique. High speed calculation and processing for vector control is carried out by TMS320C31 digital signal processor Validity of the proposed control method is verified through simulation and experimental result.
황락훈(Lak-Hoon Hwang),이춘상(Chun-Sang Lee),나승권(Sung-Kyun Na),조문택(Moon-Taek Cho) 전력전자학회 1999 전력전자학술대회 논문집 Vol.- No.-
In this paper, a vector control have been achieved by flux distribution into two axis components in d-q plane, It is a set U, V and W axis by output voltage pattern of PWM inverter, a generating flus by its output voltage changed into three axis components,At the induction -motor driving by inverter, it have already detected to fluxlinkage variation quantity and phase angle from input frequency, we proposed a software strategy of flux control algorithm that the flux vector tracing circle locus is decided as actual fluxlinkage trace reference flux,' By control algorithm reference fluxlinkage average toward direction become an axis direction induction motor is controlled flux control of stop or advance by software process<br/> This algorithm is a simplification of control circuit, ability on expressing every control parameter as quantization, compensation of quantization compensation of quantization error, a switching pattern is decided by addition and substraction.
서영수(Young-Soo Seo),이춘상(Chun-Sang Lee) 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
When the vector control, which does not need a speed signal from a mechanical speed sensor, it is possible to reduce the cost of the control equipment and to improve the control performance in many industrial application.<br/> This paper describes a rotor speed identification method of induction motor based on the theory of flux model reference adaptive system. The estimator execute the rotor speed identification so that the vector control of the induction motor may be achieved The improved auxiliary variable of the two model are introduced to perform accurate rotor speed estimation simulation result show the validity of the proposed control method.
유도전동기 토오크 및 속도의 속응제어를 위한 벡터제어 시스템에 관한 연구
황락훈(Lak-Hoon Hwang),나승권(Seung-Kwon Na),김주래(Joo-lae Kim),이춘상(Chun-Sang Lee),조문택(Moon-Taek Cho) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11
In this paper, Induction motor speed and torque are usually controlled by the fol1owing three ways slip frequency control, vector control and torque constant control. But there have been little analyses on the transient characteristics in these methods.<br/> Furthermore, since the control system is complex and/or has much problems in its implementation and transient characteristics, it is relatively difficult to apply these methods to the rapid response control for the precision machinery in these days.<br/> Accordingly, this thesis presents a nonsymmetrical T-type equivalent circuit instead of a conventional symmetrical T -type equivalent circuit, and suggests that the rapid response control can be done since the transient characteristics are considerably improved m the voltage source in the voltage source inverter control by the analysis of the equivalent circuit. The experiment has shown that the constant speed control is possible for any load variation, and the response of the torque and speed is rapid for any torque variation.