R. Baharom

A New Single-Phase Controlled Rectifier Using Single-Phase Matrix Converter

This paper presents the applications of single-phase matrix converter (SPMC) as an AC-DC controlled rectifier. For basic operation the multiple-PWM technique was used to calculate the switch duty ratio to synthesize the output. Safe commutation strategy was developed to avoid voltage spikes due to inductive load. Active current wave-shaping technique are also proposed to ensure that the supply current waveform is continuous, sinusoidal and in phase with the supply voltage. This approach utilizes boost rectifier technique for compensation. Selected experimental results are presented to verify the concept.

A New Single-Phase Controlled Rectifier Using Single-Phase Matrix Converter Topology Incorporating Active Power Filter

This paper presents application of single-phase matrix converter (SPMC) as a single-phase AC-DC controlled rectifier incorporating active power filter to ensure that the supply current is continuous, sinusoidal and in phase with the voltage. For basic rectifier operation, PWM technique was used to calculate the switch duty ratio to synthesize the output. Safe commutation strategy was developed to avoid voltage spikes due to inductive load. Basic loads represented by R load, RL load and non-linear loads are used for this investigation. Selected simulations and experimental results are presented to verify the proposed concept.

Fuzzy logic controller on DC/DC boost converter

This paper describes the design of a fuzzy logic controller using voltage output as feedback for significantly improving the dynamic performance of boost dc-dc converter by using MATLAB@Simulink software. The objective of this proposed methodology is to develop fuzzy logic controller on control boost dc-dc converter using MATLAB@Simulink software. The fuzzy logic controller has been implemented to the system by developing fuzzy logic control algorithm. The design and calculation of the components especially for the inductor has been done to ensure the converter operates in continuous conduction mode. The evaluation of the output has been carried out and compared by software simulation using MATLAB software between the open loop and closed loop circuit. The simulation results are shown that voltage output is able to be control in steady state condition for boost dc-dc converter by using this methodology.

Studies on control electronics implementation of Single-phase Matrix converter operating as AC-DC Converter with active power filter

This paper presents studies on control electronics implementation of single-phase matrix converter operating as AC-DC converter with active power filter. The control electronics uses discrete integrated circuits (ICs) for analogue control whilst the peripheral interface controller (PIC) for digital control implementation. Comparisons are made on the performance with selected simulation and experimental results, to verify proposed operation.

A New Single-Phase Inverter with Bidirectional Capabilities Using Single-Phase Matrix Converter

This paper presents implementation of single-phase matrix converter as a DC-AC converter with bidirectional capabilities. Sinusoidal Pulse Width Modulation was used to synthesize the output waveform. The proposed converter proves to be a versatile topology extending the capabilities beyond the direct AC-AC converter and four quadrant DC chopper into inverter operation. Selected experimental results are presented to verify the proposed operation.

Series-cascaded ring resonators for compact microwave filter with high rejection

Very selective fifth order bandpass ring filter is presented based on two series-connected quarter-wavelength side-coupled ring resonators. As the connection between the two quarter-wavelength lines forms a half-wavelength resonator, an extra pole is produced, leading to a total of five poles since each ring resonator presents two poles. This adds to the compactness of the overall filter and improves the selectivity and rejection. Centered at 2 GHz, the filter layout is simulated and implemented on FR4 substrate using microstrips. Filter simulation and measurement results are presented to validate the idea.

Single-phase matrix converter operating as buck and boost rectifier

This paper presents the operation of buck and boost rectifier using a single-phase matrix converter topology. Due to symmetrical and bi-directional capabilities the topology is made to operate as buck and boost rectifier. This is facilitated through proper switching control algorithm. The circuit behaviour is confirmed by MATLAB/Simulink simulation results verified experimentally in practical realisation.

A new single-phase dual converter using single-phase matrix converter

A new single-phase dual converter topology using single-phase matrix converter is presented. The converter is subjected to operating various passive loads during investigations. Basic DC motor models are also simulated to study the behavior and operation of the converter. Boost rectifier technique for power factor improvements are also presented for achieving low total harmonic distortion (THD) level. Selected simulation and experimental results are presented to verify operation.

Boost rectifier using single-phase matrix converter

A new boost rectifier using single-phase matrix converter topology is presented that could synthesize a greater DC output voltage from a given AC supply voltage. Basic operation on single-phase matrix converter which implements boost operation is outlined. Selected simulations and experimental results are presented.

Advanced single-phase AC-DC converter using single-phase matrix converter topology

This paper proposes advanced single-phase AC-DC converter using single-phase matrix converter (SPMC) topology incorporating with active power filter function. The topology is also capable of incorporating many other features for controlled rectifier operation that includes; bidirectional, regenerative and dual converter capabilities. The PWM technique was used to calculate the switch duty ratio to synthesize the output. Switch commutation arrangements were developed that allows dead time to avoid current spikes of non-ideal switches whilst providing a current path for the inductive load to avoid voltage spikes. Selected simulation and experimental results are presented to verify proposed operation.