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Based on the different types of input and output filters, the single-phase high-frequency link matrix rectifier is divided into voltage source and current source. Respectively, for the voltage and current source circuit proposed de-re-coupling coupled PWM modulation strategy, and the working state of voltage and current source topology in a high frequency period is analyzed in detail. Finally, the...
Aiming at the topology of single-phase current source high-frequency link matrix rectifier, a novel unipolar frequency doubling de-re-coupling SPWM method is proposed. The basic idea and the corresponding logic combination are used to control the matrix converter. And the working state of the circuit topology in a high frequency period is analyzed. The proposed new modulation method eliminates the...
There are many methods for detecting harmonic current in grid, which have different characteristics. Ip-iq detection method based on instantaneous reactive power theory is complex and various link, when the grid voltage is unbalanced, the grid synchronization signal error will appear, and low-pass filter (LPF) in harmonic detection link brings influence about rapidity. In order to detect the harmonic...
The single-phase high-frequency link matrix inverter topology consists of the high-frequency inverter of transformer primary-side, high-frequency transformer, matrix converter and output filter of transformer secondary-side. It has the advantages of mature circuit, isolated power conversion and bi-directional flow of energy. In this paper, we propose the de-recoupling SPWPM modulation strategy to...
The number of Brushless DC motor conduction mode is two, two-two conduction mode and three-three conduction mode. Aiming at the characteristics of large output power of brushless DC motor, good torque stability, high utilization rate of three-three conduction windings and low torque ripple, the two-two starting and three-three running strategy are studied. High-frequency link inverter technology has...
In this paper, on the basis of single phase high frequency link matrix inverter and Z source network, a single-phase Z source high frequency link matrix inverter is proposed. And use a modulation strategy named pre and post coordinated SPWM. which using boost pulse width modulation as the former, and the matrix converter work in an all ‘1’ state when the former direct connection. Z source inverter...
This paper presents a current source de-recoupling sinusoidal pulse width phase modulation (SPWPM) strategy for the control of high-frequency link inverter, the main transformer transmits the high-frequency bi-polarity tri-state current wave whose area changes according to sinusoidal, which provides the zero-current switching (ZCS) condition for the matrix converter switches. The drive signal of the...
A new topology is proposed as battery charging system. The topology has three parts. The first part uses the one-cycle control method, it has a function of power factor control, it also can improve the power factor of the system. The second part use the LLC resonance technology, it can make the switch ZVS and the rectifier diode ZCS in the secondary side. The switching loss is reduced and the efficiency...
For acquiring of better quality and reducing the harmonic of the high frequency link matrix inverter-HFLMI output, a new envelope curve modulation method is discussed. The method can make the cycle duty of the front stage circuit of the HFLMI's driving signals variable and the HFLMI can gain better output voltage and current by working with de-re -coupling SPWM modulation. The carrier wave for front...
After the working principle and states of a new type of single-phase differential single-stage inverter based on classic BOOST DC/DC converters being analyzed, a topology family of single-phase and three-phase single-stage inverters are be concluded and be brought forward as a “BOOK” inverter name in the same differential working idea. The mathematical characteristics of single-phase and three-phase...
This paper discusses vector modulation and sliding mode control for a kind of high frequency link matrix inverter (HFLMC), and presents a kind of De-Re-couple analysis idea to the HFLMC. The De-Re-couple vector condition also has been induced Especially aiming at its non-linear characteristic, this paper proposes a new control strategy called De-Re-couple vector modulation slide mode control and summarized...
Matrix rectifier is evolved from the traditional three phase to three phase matrix converter, and inherits merits of the traditional matrix converter, so it obtains more attention in recent years. According to transformer, matrix rectifier topology falls into the isolated and non-isolated topology. Now the existed modulation strategy mostly focuses on space vector modulation study and is realized...
Taking the high frequency link matrix style three-phase inverter as studying object, combining its topology and the work characteristic, this paper presented the de-re-couple analysis idea. The de-re-couple vector condition also has been induced. Aiming at its non-linear characteristic, this paper proposed a new control strategy called de-re-couple vector slide mode and summarized the design steps...
The matrix rectifier described in this paper can realizes three-phase AC voltages to a DC output voltage and can work as a power factor correction converter. The paper presents an SPWM control strategy based on virtual DC link for AC/DC matrix rectifier with high frequency link. The matrix converter in the paper can be equivalent to a virtual rectifier and a virtual inverter. The proposed control...
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