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EPE 1997 – 15: Lecture Session L4c: CONVERTER CONTROL
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1997 - Conference > EPE 1997 – 15: Lecture Session L4c: CONVERTER CONTROL
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	LOW-COST, LOW-POWER, BUCK-BASED INPUT STAGES MEETING THE IEC 1000-3-2 LINE-CURRENT-HARMONICS LIMITS   By A. S. Kislovski	[View]   [Download]
Abstract: Buck input stages provide relatively low link voltages, eliminate inrush-current surges and can meet the standard IEC 1000-3-2. Different line-current waveforms are compared in terms of the power that can be processed. Low-cost circuits realizing the most-promising strategy, and employing only general-purpose components, are proposed. An experimental verification is reported.
	AN INTELLIGENT CURRENT CONTROLLER USING DELAY COMPENSATION FOR PWM CONVERTERS   By J.-W. Lee	[View]   [Download]
Abstract: From the cost-effective point of view, it is very important to design a current controller with the most efficient current utilization of power semiconductor devices. This can be achieved by a current controller without overshoot against the limited varying control voltage in PWM converters and the accompanied delays due to a computational time delay Trondheim and so on. This paper suggests a novel intelligent current controller which consists of the proportional controller with very high gain, the conditional integrator, the modified Smithpredictor, and the space vector PWM using the vector over-modulation scheme. The digital simulations done by SIMULINKJMA TLAB show that the proposed controller ensures the full utilization of current capacity of power devices irrespective of the nonlinearities.
	MULTIVARIABLE STATE FEEDBACK CONTROL FOR THREE-PHASE POWER CONVERSION SYSTEMS   By D.-C. Lee, G-M. Lee, D.-H. Kim	[View]   [Download]
Abstract: A novel multivariable state feedback control is proposed to control three-phase power conversion systems like PWM converter and inverter of both voltage source-type and current-source type. To enhance transient responses, a feedforward control for input reference and disturbance is incorporated. In addition, the equivalent circuits and modeling of the power conversion systems are derived. Different simulation results are presented to verify the validity of the proposed scheme.
	SIMPLIFIED STATIC AND DYNAMIC MODELS OF THE 3-LOOP ACTIVE POWER FACTOR CORRECTION SYSTEMS   By A. Abramovitz; S. Ben-Yaakov	[View]   [Download]
Abstract: Simple static and dynamic models of the 3-loop Active Power Factor Correction (APFC) system are suggested and analyzed. Analytical expressions for the gain constants and the transfer functions of the feedback and feedforward loops of the APFC controller circuits are obtained and their influence on the static and dynamic behavior of the APFC system is discussed. The theory is supported by computer simulation.
	OPTIMISED CONTROL STRATEGY FOR TWO LEVEL INVERTER DRIVE APPLICATION ORIENTED TO REDUCE LINE CURRENT HARMONICS   By A. Brechter; E. De Paola; N. Palazzoli	[View]   [Download]
Abstract: In the newest Adtranz Italian project a new layout of the loco structure, based on Double Star configuration of the AC side, allows the connection of a two point level inverter directly to the DC line. One of the biggest problems is the limits of the line current harmonics which are allowed to be injected into the line. In this article the authors will present the new control strategies they have implemented on the E412 and Y530 Italian locomotives.