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Sneak circuit is a latent circuit path that causes undesired function to occur at some certain conditions. In this paper, by established directed graph of power converter, a generalized connection matrix was proposed to find out all of the switching paths. Then based on path criterions to eliminate the false paths, a new sneak circuit analysis method for power converters was given. The method was...
AC-AC converters have wide applications in AC motor drives and marine power supplies. Modern direct AC-AC converters are based on the new topology of matrix converters. Despite excellent features, matrix converters suffer from the problems associated with bidirectional switch implementation. In this paper, a new direct AC-AC converter is presented. The proposed system has most advantages of modern...
In this paper, in order to simplify the control of indirect matrix converter (IMC) and ensure the reliability of it, the theory of finite state machine (FSM) is employed. Essentially, power electronics system consists of limited amount of states, so FSM can be introduced to the design of power electronics control system. The topology of IMC is made up of two stages: rectifier stage and inverter stage...
This paper presents a MATLAB/Simulink simulation model for a space vector modulated matrix converter. Indirect and direct space vector modulation methods are implemented using an almost common structure, following a shared approach. Different switching strategies are simulated and analyzed for both methods. In addition, a set of rules are proposed for direct space vector modulation switching strategies...
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...
This paper proposes a novel algorithm for two-stage matrix converter to implement space vector pulse width modulation (SVPWM). Since the two-stage matrix converter has an intermediate dc link, the control process can be decoupled into rectifier stage modulation and inverter stage modulation. Conventionally, PWM algorithm for the rectifier stage is based on two larger source line voltages without zero...
This paper presents a strategy of matrix converter driving three-phase brushless DC motor (BLDCM) with trapezoidal back electromotive force. The matrix converter is described as an equivalent circuit combining virtual rectifier stage and virtual inverter stage. Input current space vector modulation and 120deg conduction mode are employed in these two stages respectively. An important part of this...
In this paper, the matrix converters are applied to the Direct Torque Control system of induction motor, the Direct Torque Control method of induction motor is proposed on the base of matrix converters, Some numerical simulations are carried out on the Direct Torque Control system of induction motor fed by Matrix converter. The results showed that the system has good steady state, dynamic performance,...
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