Results 211 to 220 of about 31,389 (243)
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BLDC motor control in multiple dq axes
8th International Conference on Power Electronics and Variable Speed Drives, 2000With brushless DC motors (BLDCs), current regulators in dq axes are very appreciated for sinusoidal supply. As the set current is constant, the regulator works properly. When the back-EMF is not sinusoidal, current oscillations appear in the dq regulator. A new method is proposed to avoid these regulator oscillations in case of a nonsinusoidal back-EMF.
Bonvin, Frederic, Perriard, Yves
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Controller design of a grid-tie inverter bypassing DQ transformation
52nd IEEE Conference on Decision and Control, 2013This paper proposes a novel approach for the controller design of a three-phase grid-tie inverter. First, the paper analyzes the input-output map of the system consisting of the cascade connection of a diagonal transfer function pre- and post-multiplied by DQ (direct-quadrature) and inverse DQ transformations which are prevalently used as a controller ...
Yoshito Ohta +3 more
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A genetically controlled pairing anomaly between HLA-DQ alpha and HLA-DQ beta chains.
The Journal of Immunology, 1989Abstract The HLA-DQ region contains highly polymorphic alpha and beta loci, so that a diverse set of cis- and trans-associated class II alpha/beta dimers are potentially generated in heterozygous individuals. To evaluate the extent of this predicted diversity, DQ2 beta or DQ3.2 beta cDNA were introduced into a panel of homozygous B cell ...
W W, Kwok, P, Thurtle, G T, Nepom
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Instantaneous DQ method for UPQC with PI and fuzzy controller
2014 6th IEEE Power India International Conference (PIICON), 2014This paper shows the analysis of DQ method for power conditioning with two different controller PI and Fuzzy. The Dq method is more easy to implement in comparison with Instantaneous PQ theory in terms of calculation and complexity. It take care of harmonics, sag/swell and unbalanced system.
Mukul Chourasia, Aurobinda Panda
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Estimation of dq-axis Mutual Inductances for Vibration Reduction of Encoderless Control
2021 IEEE 30th International Symposium on Industrial Electronics (ISIE), 2021This paper proposes an estimation method of dq-axis mutual inductances of Interior Permanent Magnet Synchronous Motors (IPMSM) for encoderless servo drive systems. These estimated values are utilized in the current control. Conventionally, the dq-axis mutual inductances are ignored in the current control.
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Modified DQ control approach for three-phase inverter
2017 IEEE 58th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON), 2017This paper proposes modified dq control strategy that improves the dynamic response of the grid-connected inverter compared to the conventional approach. The idea is described and validated by means of simulation results. The transient time in traditional approach is 10 times slower than in the modified inverter with the same regulator parameters.
Elena Makovenko +4 more
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Genetic control of immune response and disease susceptibility by the HLA-DQ gene
Research in Immunology, 1991The particular alleles of the HLA-DQ locus may control the low immune response to natural antigens by a dominant genetic trait through the immune suppression mediated by CD8+ suppressor T cells. The suppressor T cells may be activated by DQ-restricted and antigen-specific CD4+ suppressor/inducer T cells, because (1) a statistically significant ...
Y, Nishimura +6 more
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DQ current control using FPGA-based PI controllers
2021Control algorithms for power electronics converters traditionally rely on CPU-based controllers. However, executing these loops on a Field-Programmable Gate Array (FPGA) offloads the CPU and enables ultra-fast control rates. For three-phase AC systems requiring two PI controllers in a synchronous reference frame (dq), this technical note presents an ...
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An Effective Inertia Control Scheme for Solar PV Systems with Conventional dq Controller
2018 IEEE Power & Energy Society General Meeting (PESGM), 2018This paper proposes the application of a traditional dq controller to provide virtual inertia to the Solar PhotoVoltaic (SPV) based Distributed Generators (DGs) by adjusting its Phase Locked Loop (PLL) parameters. The relationship between the phase angle of inverter and power mismatch is derived in terms of the inertia constant.
Rakesh Kumar Panda +2 more
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DQ-Based Radial Basis Function Controller for Single-Phase PEC9 Inverter
2020 IEEE 29th International Symposium on Industrial Electronics (ISIE), 2020Controlling active and reactive powers in single-phase grid-connected inverters is matter of issue. This paper proposes an intelligent controller using Radial Basis Function (RBF) artificial neural network in a single-phase Direct Quadrant (DQ) frame to control active and reactive powers generated by nine-level Packed E-Cell (PEC9) inverter. Because of
Mohammad Babaie +4 more
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