Keping You

A Matrix–

This paper proposes a new converter using matrix converter theories and Z-source conversion concepts and illustrates its application for the integrated starter/alternator (ISA) system by a case study. The problem imposed by the traditional voltage source inverter to develop the relatively high dc voltage from the relatively low ac voltages of an ac machine in the ISA system has been addressed in this paper. The proposed converter achieved boost mode dc-ac inversion and buck mode ac-dc rectification, hence allowing the peak voltage of the ac motor to exceed the dc source voltage substantially. In the rectification mode, it can achieve the regulated output dc voltage with variable-voltage-variable-frequency ac source without extra close-loop control or large energy-storage devices. This paper investigates the quadrant operation of the converter, its control, its steady-state performance, and experimental verification.

Z

This paper proposes a new converter for the 42 V ISA system. The problem of the low voltage rating of the AC machine developing regulated 42 V with input power factor correction has bee addressed in this paper. The proposed converter uses a matrix converter coupled with a Z-source inverter which achieves boost mode operation DC-AC conversion and buck AC-DC operation allowing the peak voltage of the AC motor to exceed the 42 V DC bus voltage substantially. The AC side operates with near unity power factor. The paper investigates the quadrant operation of the converter, its control, and its steady-state performance.

-Source Converter With AC–DC Bidirectional Power Flow for an Integrated Starter Alternator System

Using matrix converter theories and Z-source conversion concepts, a new converter is proposed in this paper for the automotive integrated starter/alternator (ISA) 42 V system. The problem imposed by the traditional VSI inverter, to develop the relatively high DC voltage from the relatively low AC voltages of AC machine in 42 V ISA system, has been addressed in this paper. The proposed converter achieved boost mode DC-AC inversion and buck mode AC-DC rectification, hence allowing the peak voltage of the AC motor to exceed the 42 V DC bus voltage substantially. In the rectification mode, it can achieve the regulated output DC voltage with VWF AC source without extra close-loop control. The paper investigates the quadrant operation of the converter, its control, its steady-state performance, and experimental verification.

A new power converter for ISA 42 V powernet system using matrix converter theory and Z-source inverter concepts

This paper presents the analytical calculation of conduction and switching losses for a novel matrix-z-source converter and a conventional VSI converter respectively for automotive ISA 42 V system, and investigates the relevant comparison. The loss models are constructed taking into account of PWM modulation strategy while the calculation of semiconductor losses are based on experimentally verified parameters of switch devices. The conduction and switching losses in both starting (DC-AC inversion) and generating (AC-DC rectification) operation modes are investigated, and in either case, the comparison are graphically presented with respect to the modulation indices or the pairs of modulation index and AC current displacement angle. The comparison shows that in the starting operation mode the matrix-z-source converter can offer less total conduction and switching loss than VSI converter in certain range of modulation indices, although the range is somehow smaller than the ordinary z-source inverter because of the power semiconductors in series connection. While in the generating operation mode, the novel matrix-z-source converter can promise less total conduction and switching loss than the conventional VSI converter in almost the full range of modulation indices.

A matrix-Z-source converter for automotive integrated starter alternator system

This paper presents the application of reduced form of general direct space vector modulation(G-SVM) approach of ac-ac matrix converter theory to three-phase ac-dc matrix rectifier. The reduced form of G-SVM and the derivation of three-phase ac-dc matrix rectifier from three-phase ac-ac matrix converter are described and theoretically justified. A prominent feature of the reduced G-SVM controlled three-phase ac-dc matrix rectifier, in addition to its capability of tight dc-voltage regulation, is the simple and direct control of the input ac current displacement phase angles (displacement power factors). Simulated and experimental verifications for this work have been presented and discussed.

Analytical Comparison of Conduction and Switching Losses of A Novel Matrix-Z-Source Converter and A Conventional VSI Converter for Automotive ISA 42 V System

This paper proposes two PWM strategies and related programming methods for DC-to-three-phase AC voltage-source-inversion and three-phase AC-to-DC voltage-source-rectification respectively. They are based on the general direct space vector modulation approach derived from matrix converter theory, and sharing the same algorithm in calculating vector duty-cycles. The one for DC-AC inversion can accommodate maximum constant boost control for impedance-source (z-source) inverter. Both the two PWM strategies were verified by simulated implementation in a single-stage bidirectional converter, in which a variety of matrix converter and a z-source inverter were used, for the study of ISA 42 V system

Applying reduced general direct space vector modulation approach of AC-AC matrix converter theory to achieve unity power factor controlled three-phase AC-DC matrix rectifier

This paper proposes a new converter for the 42V ISA system. The problem of the low voltage rating of the AC machine developing regulated 42V with input power factor correction has been addressed in this paper. The proposed converter uses a matrix converter coupled with a z-source inverter, achieving boost mode operation DC-AC conversion and buck AC-DC operation, and allowing the peak voltage of the AC motor to exceed the 42V DC bus voltage substantially. The AC side operates with near unity power factor in generating operation. The paper investigates the quadrant operation of the converter, its control, and its steady-state and open-loop dynamic performance

Application of General Space Vector Modulation Approach of AC-AC Matrix Converter Theory to A New Bidirectional Converter for ISA 42 V System

This paper investigates the analytical models of Conduction and Switching Losses (CASLs) of the three-phase ac-dc matrix rectifier. An analytical model of CASLs is obtained through the examination of operating principles for three-phase ac-dc matrix rectifier. The effectiveness of the models has been experimentally verified.

Constructing A Novel Power Converter by Matrix Converter Theory and Z-Source Inverter Concepts for ISA 42 V PowerNet System

The analytical model of the conduction and switching losses of matrix Z-source converter (MZC) was investigated in this paper. The model provides a measurable way to approximate the total loss of MZC.

Measurement-based analytical model of Conduction and Switching Losses of three-phase AC-DC matrix rectifier

This paper proposed two arbitrary zero-placement (discontinuous) PWM strategies for DC-AC three-phase voltage source-inversion and three-phase AC-DC voltage-source rectification respectively. They are based on the general space vector modulation approach derived from matrix converter theory. The two PWM strategies are sharing the same algorithm in calculating space vector duty-cycles. Both the two PWM strategies were verified by simulated implementation in a new converter based on matrix converter theory and z-source inverter concepts for a case study of ISA 42 V PowerNet