EPE Association: EPE-PEMC 2000 - Topic 03c: DSP Control Techniques

EPE-PEMC 2000 - Topic 03c: DSP Control Techniques
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2000 - Conference > EPE-PEMC 2000 - Topic 03: Control of Converters > EPE-PEMC 2000 - Topic 03c: DSP Control Techniques

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   Control of a Three Phase Boost Rectifier with a DSP-Controller
By Doval-Gandoy J., Castro C., Penalver C.M. [View]
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Abstract: Three phase bidirectional rectifiers or Voltage Source Recifiers (VSR) among other alternatives, offer several advantages over line conmutated rectifiers. Advantages include displacement power factor control, reduced line current harmonic distortion and ac four-quadrant operation can be obtained. On its dc side a dc-link unidirectional voltage is obtained and bidirectional power transfer capability is possible by reversing the flow direction of the dc-link current. This paper presents the analysis and design procedure for the control loop of a three phase bidirectional rectifier. Experimental results from a 1.5 kW VSR show the feasibility of the design procedure. The complete mathematical model of the rectifier in the synchronous reference frame has been programmed on a DSP. The actual currents and output voltage are acquired through the on-chip A/D converters. A space vector modulation has been implemented by using the PWM unit, a PLL has been implemented by using a look-up table and two capture inputs.

   Current Control of the AC-DC-AC Converter with Help of a Floating Point DSP
By Barlik R.*, Hartman M.T., Iwaszkiewicz J. [View]
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Abstract: The paper presents a discussion of some aspects of the current control of the complex AC - DC - AC converter. Particularly a problem of the DC link voltage level and its regulation is approached. The discussion is based on simulation and experimental results which have been obtained during research works and laboratory tests concerning to control algorithms. Both inverters of the AC-DC-AC structure are current-controlled VSIs. The control algorithm realizes the idea of histeresis control with prediction: the control vector is selected as the most effective one among all admissible vectors. The criteria of the selection are included. The experiments have been realized with help of the floating-point DSP technique. A floating point controller board with a Texas Instruments TMS320C31 digital signal processor has been used.

   DSP Algorithms for Low Component Count Inverters
By de Silva D.I.M.*, Rathnayake L.N., Kularatna N. [View]
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Abstract: Use of low component count sinewave inverters and DSP based algorithms for such inverters have been demonstrated in the past [1,2]. These inverter techniques for 100VA to 1000VA range can be coupled with fast acting bipolar transistor array based AC regulators through a triport transformer [3 to 6]. The techniques allow RMS output value as well as harmonic level controlled with DSP blocks and algorithms. Paper discusses the approach in this design technique, based on an ongoing project. Hardware target is to use a digital potentiometer array controlled by a DSP subsystem.

   Flexible Control Architecture for Voltage Source Inverters Suitable for Low and Medium Voltage Applications
By Scaglia A., Matuonto M., Gatti E. [View]
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Abstract: The paper deals with a new hardware architecture suited for controlling different Voltage Source Inverter topologies, thanks to its flexibility and modularity. The proposed solution allows to reach high performance and at the same time to reduce cost and space so that it can be employed in a wide power range of inverters, from the classical ones, for low voltage applications, to the multilevel inverters, for medium voltage applications.The presented architecture has been used to control three phase two level inverters as well as multilevel inverters with several H-bridges in series in each phase and NPC (Neutral Point Clamped) inverters. The paper is focused on the control architecture characteristics: it presents the control structure and the key points of its realization. One of these points is that all different series of VSI inverters (low and medium voltage, two level and multilevel, with power range from few kilowatt to several megawatt) are identical regarding performance, man-machine interface, diagnostics, interfacing. Pictures of the control modules are included at the end of the paper.

EPE-PEMC 2000 - Topic 03c: DSP Control Techniques
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2000 - Conference > EPE-PEMC 2000 - Topic 03: Control of Converters > EPE-PEMC 2000 - Topic 03c: DSP Control Techniques
	[return to parent folder]

	Control of a Three Phase Boost Rectifier with a DSP-Controller By Doval-Gandoy J., Castro C., Penalver C.M.	[View] [Download]
Abstract: Three phase bidirectional rectifiers or Voltage Source Recifiers (VSR) among other alternatives, offer several advantages over line conmutated rectifiers. Advantages include displacement power factor control, reduced line current harmonic distortion and ac four-quadrant operation can be obtained. On its dc side a dc-link unidirectional voltage is obtained and bidirectional power transfer capability is possible by reversing the flow direction of the dc-link current. This paper presents the analysis and design procedure for the control loop of a three phase bidirectional rectifier. Experimental results from a 1.5 kW VSR show the feasibility of the design procedure. The complete mathematical model of the rectifier in the synchronous reference frame has been programmed on a DSP. The actual currents and output voltage are acquired through the on-chip A/D converters. A space vector modulation has been implemented by using the PWM unit, a PLL has been implemented by using a look-up table and two capture inputs.

	Current Control of the AC-DC-AC Converter with Help of a Floating Point DSP By Barlik R., Hartman M.T., Iwaszkiewicz J.*	[View] [Download]
Abstract: The paper presents a discussion of some aspects of the current control of the complex AC - DC - AC converter. Particularly a problem of the DC link voltage level and its regulation is approached. The discussion is based on simulation and experimental results which have been obtained during research works and laboratory tests concerning to control algorithms. Both inverters of the AC-DC-AC structure are current-controlled VSIs. The control algorithm realizes the idea of histeresis control with prediction: the control vector is selected as the most effective one among all admissible vectors. The criteria of the selection are included. The experiments have been realized with help of the floating-point DSP technique. A floating point controller board with a Texas Instruments TMS320C31 digital signal processor has been used.

	DSP Algorithms for Low Component Count Inverters By de Silva D.I.M., Rathnayake L.N., Kularatna N.*	[View] [Download]
Abstract: Use of low component count sinewave inverters and DSP based algorithms for such inverters have been demonstrated in the past [1,2]. These inverter techniques for 100VA to 1000VA range can be coupled with fast acting bipolar transistor array based AC regulators through a triport transformer [3 to 6]. The techniques allow RMS output value as well as harmonic level controlled with DSP blocks and algorithms. Paper discusses the approach in this design technique, based on an ongoing project. Hardware target is to use a digital potentiometer array controlled by a DSP subsystem.

	Flexible Control Architecture for Voltage Source Inverters Suitable for Low and Medium Voltage Applications By Scaglia A., Matuonto M., Gatti E.	[View] [Download]
Abstract: The paper deals with a new hardware architecture suited for controlling different Voltage Source Inverter topologies, thanks to its flexibility and modularity. The proposed solution allows to reach high performance and at the same time to reduce cost and space so that it can be employed in a wide power range of inverters, from the classical ones, for low voltage applications, to the multilevel inverters, for medium voltage applications.The presented architecture has been used to control three phase two level inverters as well as multilevel inverters with several H-bridges in series in each phase and NPC (Neutral Point Clamped) inverters. The paper is focused on the control architecture characteristics: it presents the control structure and the key points of its realization. One of these points is that all different series of VSI inverters (low and medium voltage, two level and multilevel, with power range from few kilowatt to several megawatt) are identical regarding performance, man-machine interface, diagnostics, interfacing. Pictures of the control modules are included at the end of the paper.