EPE Association: EPE 2016 - DS2f: Application of Control Methods to Electrical Systems

EPE 2016 - DS2f: Application of Control Methods to Electrical Systems
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2016 ECCE Europe - Conference > EPE 2016 - Topic 03: Measurement and Control > EPE 2016 - DS2f: Application of Control Methods to Electrical Systems

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   A Novel EMI Reduction Design Technique in IGBT gate driver for Turn-on Switching mode
By Hamidreza GHORBANI [View]
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Abstract: This paper proposes a novel insulated gate bipolar transistor (IGBT) gate driver. The new gate driver(GD) has positive effect on the injected gate current to enhance the IGBT switching mechanism. Theapproach is based on the Posicast control method. Simple structure is the most important advantage ofthis feedforward controller. The main objective is to improve turn-on switching transients withoutharmful effect on the IGBT efficiency. The electro-magnetic interface (EMI) reduction has beendiscussed as another important benefit of this control method.

   A Novel Method for Current Balancing between Parallel-connected IGBTs
By Ying CHEN [View]
[Download]

Abstract: Parallel-connected IGBTs are prone to large-current destruction in high-power applications due to current unbalance between each IGBT branches. This paper proposes a novel control method to improve the current balance in order to protect the device against over current destruction. The method uses two control loops to confine the current rising speed as well as to reconcile the current change start time difference. Without current measurement or any manual operation, the implementation is thus simple and convenient. Details about the strategy and its superiority are discussed. Simulation results validate the effectiveness of the proposed method.

   Analysis of Cost Functions and Setpoints for Predictive Speed Control of PMSM Drives
By Vaclav SMIDL [View]
[Download]

Abstract: Abstract Performance of the PMSM numerical predictive control on very long horizon is studied in simulation. It is shown that the trajectories of optimally controlled system follow the well known trajectories of maximum torque per ampere and maximum torque per volt. Significant difference from these trajectories is observed only at rapid request for maximum current. We compare the numerical solution with analytically obtained solution of minimum time current control. We show that available minimum time current control algorithm do not match the observed trajectory. An idea how to achieve the same behavior using only one step ahead prediction is proposed. The time optimal current control is approximated using ad-hoc arguments. The challenge for future research is to design better minimum time current control strategy.

   Comparison of Control Methods for H-Bridge fed Five-Phase Permanent Magnet Synchronous Motors
By Torben JONSKY [View]
[Download]

Abstract: Three different control methods for a five-phase permanent magnet synchronous motor are presented and compared to each other. The control schemesinclude rotor-fixed approaches known as Field Orientated Control and stator-fix approaches like Direct Torque Control and Indirect Self Control. Simulations are carried out and are compared to measurement results.

   Comparison of Driving Concepts for Silicon Carbide Bipolar Junction Transistors
By Ulf MUETER [View]
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Abstract: This paper presents a comparison between conventional base driver concepts for bipolar silicon carbide transistors and an approach based on utilizing a buck-converter-IC to drive the bipolar transistor. The different concepts are simulated and compared with respect to switching performances and driving losses. The results are validated by corresponding measurements.

   Control Strategy for a Parallel Active Buffer Circuit in a Single-Phase-Inverter
By Matthias ZEHELEIN [View]
[Download]

Abstract: This paper presents a control strategy for a single-phase photovoltaic inverter, using a parallel activebuffer circuit. The aim is to reduce the volume demand of the necessary capacitance for filtering thetwice line frequency pulsating power. The pulsating power is stored in an additional buffer capacitor,which is decoupled from the input voltage by an active buffer circuit. Therefore a high voltage swingis possible. The control concept allows an independent operation of the parallel buffer circuit from theinverter circuit.

   High Response and Robustness Torque Controller by Low-Cost Hall Effect Sensor on Electric Power Steering Applications
By Jaehyun LEE [View]
[Download]

Abstract: Compared to passenger vehicles, Electric Power Steering (EPS) system requires a much higher response ability, acceleration performance, and reliability. Because there is no cost advantage from implementing an high resolution, it is essential to use a lower cost resolution sensor to achieve cost effectiveness. Yet, under a wide range of speed, more precise control is necessary. In this paper, a PMSM (Permanent Magnet Synchronous Machine) torque controller has been designed for the EPS system based on the novel M/T method with low-cost hall-effect sensor. Using a power-pack for the EPS system both response and robustness are verified through the following experimental results.

   Real-Time Implementation of some Fourier Transform Based Techniques for Fundamental Harmonic Detection using dSPACE
By PETRE - MARIAN NICOLAE [View]
[Download]

Abstract: The performance of some Fourier transform based fundamental current detection algorithms is evaluated and compared in this paper. Some difficult conditions are imposed by a load which draws a highly distorted current with a slight fluctuation, i.e. with non-equal semi-periods. The implemented algorithms are Recursive Discrete Fourier Transform (RDFT), Discrete Fourier Transform (DFT) implemented through a Finite Impulse Response (FIR) filter and respectively the Fast Fourier Transform (FFT) with Butterfly operation and radix-2 decimation in time (DIT). A digital signal processor (DSP) based solution is used for real-time implementation, namely a dSPACE 1103 controller development board. MATLAB/Simulink software is used for the design of the algorithms because it provides specialized tools and blocks. For the performance comparison one used criteria like total harmonic distortion (THD) and settling time of detected fundamental current and also the run time for the DSP. This study may be useful as a guide for engineers in selecting the suitable Fourier transform based control algorithm for active power filters or other grid-synchronized equipments which are operating in difficult load conditions.

EPE 2016 - DS2f: Application of Control Methods to Electrical Systems
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2016 ECCE Europe - Conference > EPE 2016 - Topic 03: Measurement and Control > EPE 2016 - DS2f: Application of Control Methods to Electrical Systems
	[return to parent folder]

	A Novel EMI Reduction Design Technique in IGBT gate driver for Turn-on Switching mode By Hamidreza GHORBANI	[View] [Download]
Abstract: This paper proposes a novel insulated gate bipolar transistor (IGBT) gate driver. The new gate driver(GD) has positive effect on the injected gate current to enhance the IGBT switching mechanism. Theapproach is based on the Posicast control method. Simple structure is the most important advantage ofthis feedforward controller. The main objective is to improve turn-on switching transients withoutharmful effect on the IGBT efficiency. The electro-magnetic interface (EMI) reduction has beendiscussed as another important benefit of this control method.

	A Novel Method for Current Balancing between Parallel-connected IGBTs By Ying CHEN	[View] [Download]
Abstract: Parallel-connected IGBTs are prone to large-current destruction in high-power applications due to current unbalance between each IGBT branches. This paper proposes a novel control method to improve the current balance in order to protect the device against over current destruction. The method uses two control loops to confine the current rising speed as well as to reconcile the current change start time difference. Without current measurement or any manual operation, the implementation is thus simple and convenient. Details about the strategy and its superiority are discussed. Simulation results validate the effectiveness of the proposed method.

	Analysis of Cost Functions and Setpoints for Predictive Speed Control of PMSM Drives By Vaclav SMIDL	[View] [Download]
Abstract: Abstract Performance of the PMSM numerical predictive control on very long horizon is studied in simulation. It is shown that the trajectories of optimally controlled system follow the well known trajectories of maximum torque per ampere and maximum torque per volt. Significant difference from these trajectories is observed only at rapid request for maximum current. We compare the numerical solution with analytically obtained solution of minimum time current control. We show that available minimum time current control algorithm do not match the observed trajectory. An idea how to achieve the same behavior using only one step ahead prediction is proposed. The time optimal current control is approximated using ad-hoc arguments. The challenge for future research is to design better minimum time current control strategy.

	Comparison of Control Methods for H-Bridge fed Five-Phase Permanent Magnet Synchronous Motors By Torben JONSKY	[View] [Download]
Abstract: Three different control methods for a five-phase permanent magnet synchronous motor are presented and compared to each other. The control schemesinclude rotor-fixed approaches known as Field Orientated Control and stator-fix approaches like Direct Torque Control and Indirect Self Control. Simulations are carried out and are compared to measurement results.

	Comparison of Driving Concepts for Silicon Carbide Bipolar Junction Transistors By Ulf MUETER	[View] [Download]
Abstract: This paper presents a comparison between conventional base driver concepts for bipolar silicon carbide transistors and an approach based on utilizing a buck-converter-IC to drive the bipolar transistor. The different concepts are simulated and compared with respect to switching performances and driving losses. The results are validated by corresponding measurements.

	Control Strategy for a Parallel Active Buffer Circuit in a Single-Phase-Inverter By Matthias ZEHELEIN	[View] [Download]
Abstract: This paper presents a control strategy for a single-phase photovoltaic inverter, using a parallel activebuffer circuit. The aim is to reduce the volume demand of the necessary capacitance for filtering thetwice line frequency pulsating power. The pulsating power is stored in an additional buffer capacitor,which is decoupled from the input voltage by an active buffer circuit. Therefore a high voltage swingis possible. The control concept allows an independent operation of the parallel buffer circuit from theinverter circuit.

	High Response and Robustness Torque Controller by Low-Cost Hall Effect Sensor on Electric Power Steering Applications By Jaehyun LEE	[View] [Download]
Abstract: Compared to passenger vehicles, Electric Power Steering (EPS) system requires a much higher response ability, acceleration performance, and reliability. Because there is no cost advantage from implementing an high resolution, it is essential to use a lower cost resolution sensor to achieve cost effectiveness. Yet, under a wide range of speed, more precise control is necessary. In this paper, a PMSM (Permanent Magnet Synchronous Machine) torque controller has been designed for the EPS system based on the novel M/T method with low-cost hall-effect sensor. Using a power-pack for the EPS system both response and robustness are verified through the following experimental results.

	Real-Time Implementation of some Fourier Transform Based Techniques for Fundamental Harmonic Detection using dSPACE By PETRE - MARIAN NICOLAE	[View] [Download]
Abstract: The performance of some Fourier transform based fundamental current detection algorithms is evaluated and compared in this paper. Some difficult conditions are imposed by a load which draws a highly distorted current with a slight fluctuation, i.e. with non-equal semi-periods. The implemented algorithms are Recursive Discrete Fourier Transform (RDFT), Discrete Fourier Transform (DFT) implemented through a Finite Impulse Response (FIR) filter and respectively the Fast Fourier Transform (FFT) with Butterfly operation and radix-2 decimation in time (DIT). A digital signal processor (DSP) based solution is used for real-time implementation, namely a dSPACE 1103 controller development board. MATLAB/Simulink software is used for the design of the algorithms because it provides specialized tools and blocks. For the performance comparison one used criteria like total harmonic distortion (THD) and settling time of detected fundamental current and also the run time for the DSP. This study may be useful as a guide for engineers in selecting the suitable Fourier transform based control algorithm for active power filters or other grid-synchronized equipments which are operating in difficult load conditions.