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This paper presents a new circuit topology of active edge resonant snubbers assisted half-bridge soft switching PWM inverter type high power dc-dc converter for photovoltaic applications. The proposed step-up DC/DC converters with transformer isolation can obtain high voltage step-up trough turns ratio. The proposed dc-dc power converter is composed of typical voltage source-fed half-bridge high frequency...
This paper is mainly concerned with the development of a new state-of-the-art prototype, high-efficiency, phase-shift, soft-switching, pulse-modulated, full-bridge DC-DC power converter with a high-frequency power transformer, which is designed for utility-grid-tied photovoltaic (PV) power inverters. The proposed high-frequency transformer (HFTR) link DC-DC converter topology is based on a new conceptual...
This paper presents a new circuit topology of active edge resonant snubbers assisted half-bridge soft switching PWM inverter type dc-dc high power converter for DC bus feeding power plants. The proposed dc-dc power converter is composed of typical voltage source-fed half-bridge high frequency PWM inverter with a high frequency planar transformer link in addition to input DC busline side power semiconductor...
Because of achieving high efficiency power conversion, switching power converters are widely used. About the switching power converters, pulse width modulation (PWM) technique is used to produce switching pattern. But this scheme causes large switching noise peak components at the multiple numbers of carrier frequency. And this raises problems of clearing noise regulations. This paper proposes a novel...
This paper is mainly concerned with the state-of-the-art feasible development of a novel prototype high-efficiency phase-shift soft-switching pulse modulated full-bridge DC-DC power converter with a high-frequency power transformer, which is designed for utility-grid tied photovoltaic (PV) power inverters. The proposed high-frequency transformer (HFTR) link DC-DC converter topology is based upon a...
This paper presents a PWM converter, which enables to maintain high power-factor of arc welding power supply and to suppress input current harmonics. The main function of this system is to maintain unity power-factor by controlling input current to be sinusoidal, and to generate stable DC output voltage through half-bridge inverter and output rectifier. The proposed converter has high power factor,...
This paper presents a new circuit topology of active edge resonant snubbers assisted half-bridge soft switching PWM inverter type dc-dc high power converter for DC bus feeding power plants. The proposed dc-dc power converter is composed of typical voltage source-fed half-bridge high frequency PWM inverter with a high frequency planar transformer link in addition to input DC busline side power semiconductor...
This paper discusses the circuit topologies for simple three-level phase shift ZVS-PWM DC-DC converters in addition to the proposed three-level diode clamped and flying capacitor hybrid phase shift soft switched PWM high frequency link DC-DC converters for industrial gas metal arc welding machines. The arc welding machines for TIG, MIG and MAG require low voltage and large current DC output for high...
This paper is concerned with some experimental results and practical evaluations of a three-level phase shifted ZVS-PWM DC-DC converter with neutral point clamping diodes and flying capacitor for a variety of gas metal arc welding machines. This new DC-DC converter suitable for high power applications is implemented by modifying the high-frequency-linked half bridge soft switching PWM DC-DC converter...
This paper presents a one stage circuit topology for a double buck chopper type single phase PFC converter with active power filtering function in a utility AC grid side and DC output power quality, which can realize much smaller in reactor size and lighter in its weight, along with two unique channel control schemes. The main advantageous point of the newly-proposed PFC converter includes that the...
This paper presents single stage series load resonant ZVS-PWM high frequency inverter which operates one diode conduction mode and critical ZCS PFC rectifier for induction heating (IH) applications. This single stage inverter is composed of a single phase PFC rectifier operating at one diode conduction mode and asymmetrical ZVS-PWM high frequency resonant inverter without the interlink bulky electrolytic...
This paper presents 2 active edge resonant cell interleaved boost DC-DC converter. It uses two feedback loops including similar to current mode control with one slow outer loop and the other for faster inner PWM control loop. To improve the transient response of the 2-cell assisted ZCS boost converter system, a coupled inductor of energy storage inductors is used on the basis of interleave architecture...
This paper presents some experimental results and practical evaluations of a high-frequency linked three-level phase-shift ZVS-PWM half bridge DC-DC high power converter for distributed DC power feeder. This new DC-DC converter with neutral point clamping and flying capacitor hybrid configuration is implemented by modifying the high-frequency-linked HB soft switching PWM DC-DC power converter with...
A high frequency carrier PWM regulator used for various types of switch-mode power converters are based on the digital or analog signal comparison processing. The voltage-mode or current-mode PWM strategies due to comparison signal processing between voltage/current reference and periodic carrier signals cause the switching noise peaks dependent on the multiple numbers of carrier signal frequency...
This paper presents some experimental results and practical evaluations of neutral point clamping and flying capacitor hybrid three-level phase shifted soft switching PWM DC-DC high power converter with high frequency transformer and center-tapped rectifier. This new DC-DC converter developed for TIG, MIG and MAG arc welders is implemented by modifying the high-frequency-linked HB soft switching PWM...
This paper presents a high-efficiency one stage ZVS-PWM resonant single-ended push-pull (SEPP) high frequency inverter with new PFC functional scheme. This high-frequency resonant power converter with lossless snubbing capacitors which is composed of a passive PFC converter operating at one diode conducting full bridge circuit mode consists of asymmetrical ZVS-PWM high frequency inverter with non-bulky...
This paper presents a novel soft-switching PWM utility frequency AC to high frequency (HF) AC power conversion circuit incorporating boost-active clamp single stage inverter topology. This power converter is more suitable and acceptable for cost effective HF consumer induction heating (IH) applications. Its operating principle and the operation modes are presented using the switching mode equivalent...
This paper deals with a novel type soft switching utility frequency AC- high frequency AC converter using asymmetrical PWM bidirectional active switches which can be defined as high frequency resonant matrix converter. This power frequency changer can directly convert utility frequency AC power to high frequency AC power ranging more than 20 kHz up to 100 kHz. Only one active edge resonant capacitor-assisted...
This paper presents a utility frequency AC (UFAC) to high frequency AC (HFAC) direct power frequency conversion pulse modulated conditioning circuit using bidirectional power switches. This power converter can efficiently operate under a principle of active zero voltage clamped soft commutation for consumer induction heating (IH) fixing roller for copy machine and printer. This HFAC direct power frequency...
This paper presents a utility frequency AC (UFAC) to high frequency AC (HFAC) direct power frequency conversion pulse modulated conditioning circuit using bidirectional power switches. This power converter can efficiently operate under a principle of active zero voltage clamped soft commutation for consumer induction heating (IH) fixing roller for copy machine and printer. This HFAC direct power frequency...
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