scholarly journals Fundamental study on lifting system for mining marine mineral resources (3rd Report). Theoretical Analysis for Non-Equilibrium Flow Fields with Transitional Process from Two-Phase to Three-Phase Mixtures by Injecting Air Halfway into a Lifting Pipe.

1996 ◽  
Vol 112 (2) ◽  
pp. 81-88 ◽  
Author(s):  
Natsuo HATTA ◽  
Hitoshi FUJIMOTO
Keyword(s):  
Theoretical Analysis ◽  
Mineral Resources ◽  
Flow Fields ◽  
Equilibrium Flow ◽  
Two Phase ◽  
Fundamental Study ◽  
Transitional Process ◽  
Three Phase ◽  
Lifting System ◽  
Non Equilibrium

COMPONENT MINIMIZED TOPOLOGY OF DC TO THREE-PHASE INVERTER

2004 ◽  
Vol 13 (04) ◽  
pp. 863-875 ◽  
Author(s):  
MIRO MILANOVIC ◽  
FRANC MIHALIC ◽  
DRAGO DOLINAR
Keyword(s):  
Phase Transformation ◽  
Theoretical Analysis ◽  
Single Phase ◽  
Main Element ◽  
Two Phase ◽  
Phase Inverter ◽  
Three Phase ◽  
Phase Converter ◽  
Inverter Topology ◽  
Three Phase Inverter

A DC to three-phase converter based on using a two-phase to three-phase transformation has been developed. To provide a better understanding of the operation principle, the transformer, which is the main element of the system, has been supplied by two single-phase inverters. According to this, the theoretical analysis of the proposed system is shown. This analysis is based on two-phase to three-phase transformation. The theoretical analysis and the experimental verification of the proposed principle are presented. In this paper the component minimized inverter topology is also proposed.

The generated power of multipole induction generator with secondary winding on the stator

2009 ◽  
Vol 25 (25) ◽  
pp. 31-34
Author(s):  
Guntis Diļevs ◽  
Edgars Jakobsons
Keyword(s):  
Rotation Speed ◽  
Induction Generator ◽  
Two Phase ◽  
Three Phase ◽  
Secondary Winding

The generated power of multipole induction generator with secondary winding on the statorThis paper posses the construction of induction generator, which has the ability to operate at a low rotation speed. This generator can be applied for directly driven turbine without using the gearbox. The generator is multi pole with all of the windings placed on the stator. Rotor is tooth-like and has no windings on it. Primary winding is three phase, secondary winding is two phase.

Inductor Saturation Compensation in Three-Phase Three-Wire Voltage-Source Converters via Inverse System Dynamics-I

2020 ◽  
Author(s):  
Ziya Özkan ◽  
Ahmet Masum Hava
Keyword(s):  
Dynamic Model ◽  
Dynamic Performance ◽  
Current Control ◽  
Inverse System ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Two Phase ◽  
Inverse Dynamic ◽  
Three Phase ◽  
Steady State Current

In three-phase three-wire (3P3W) voltage-source converter (VSC) systems, utilization of filter inductors with deep saturation characteristics is often advantageous due to the improved size, cost, and efficiency. However, with the use of conventional synchronous frame current control (CSCC) methods, the inductor saturation results in significant dynamic performance loss and poor steady-state current waveform quality. This paper proposes an inverse dynamic model based compensation (IDMBC) method to overcome these performance issues. Accordingly, a review of inductor saturation and core materials is performed, and the motivation on the use of saturable inductors is clarified. Then, two-phase exact modelling of the 3P3W VSC control system is obtained and the drawbacks of CSCC have been demonstrated analytically. Based on the exact modelling, the inverse system dynamic model of the nonlinear system is obtained and employed such that the nonlinear plant is converted to a fictitious linear inductor system for linear current regulators to perform satisfactorily.

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