The power of DC electrical sources is combined onto a DC buss, such that each source behaves independently from any other source attached to the buss. In one embodiment, a converter module is attached to each of a plurality of solar photovoltaic panels and its output is attached in a parallel manner to a common buss that forms the input to a DC AC inverter. The converter module includes a Maximum Power Point Tracking component that matches the output impedance of the panels to the input impedance of the converter module. The converter also includes a communication component that provides parametric data and identification to a central inverter. Data generated by each converter module is transmitted over the power line or by wireless means and is collected at the inverter and forwarded to a data collection and reporting system.

Advanced Renewable Energy Harvesting

A fuel cell assembly including a membrane electrode assembly, an anode plate, a cathode plate, a removable fuel cartridge, and a fuel delivery system. The assembly includes an anode, a cathode, and a polymer electrolyte membrane having a fuel side and an oxygen side. The fuel cartridge includes an expandable fuel bladder for receiving liquid fuel, an expandable pressure member in contact with the bladder for maintaining a positive pressure on the bladder, and a sealable exit port in fluid communication with the bladder. The fuel delivery system delivers fuel from the cartridge to the fuel side of the membrane. An Interface, Control, and Regulator Circuit for Fuel Cell Powered Electronic Device.

Fuel cell assembly for portable electronic device and interface, control, and regulator circuit for fuel cell powered electronic device

A fuel cell assembly including a membrane electrode assembly, an anode plate, a cathode plate, a removable fuel cartridge, and a fuel delivery system. The assembly includes an anode, a cathode, and a polymer electrolyte membrane having a fuel side and an oxygen side. The fuel cartridge includes an expandable fuel bladder for receiving liquid fuel, an expandable pressure member in contact with the bladder for maintaining a positive pressure on the bladder, and a sealable exit port in fluid communication with the bladder. The fuel delivery system delivers fuel from the cartridge to the fuel side of the membrane. The removable fuel cartridge includes a rigid fuel container having a first container portion and a second container portion permanently enclosing the expandable fuel bladder and the expandable pressure member. The first container portion and the second container portion may be permanently affixed to one another with an adhesive.

Fuel cell cartridge for portable electronic device

Electronic circuit and control system and method in hardware and software for controlling fuel cell and fuel cell powered electrical or electronic device. System, device, method and computer program and computer program product for monitoring and controlling fuel cell based power supply and powered information appliance, such as mobile telephone and laptop computer. Fuel cell for powering and fuel cell powered information appliance or computer. Fuel cell power pack adapted to provide electrical operating power to an electrical device. Interface circuit and control device and method for a fuel cell powered electronic device. Method of controlling operation of a fuel cell to generate electricity for an electrical device. Electrical control power pack adapted to replace battery for a laptop computer.

Fuel cell power supply for portable computing device and method for fuel cell power control

There are provided an electric power converter in which common-mode noise is suppressed without causing enlargement of components, increase in the number of components, a cost hike, and the like The electric power converter is provided with a capacitor ( 12 ) connected with the input terminal of the inverter circuit ( 13 a ), a noise suppression means ( 10 a, 10 b ) that is provided around at least one of input-side conductors connected with the input terminals of the inverter circuit ( 13 a ) and output-side conductors connected with the output terminals of the inverter circuit ( 13 a ), an electric quantity detector ( 11, 19 a, 19 b, 19 c ) that is provided in the input-side conductors or the output-side conductors at a position opposite to the inverter circuit with respect to the noise suppression means ( 10 a, 10 b ), and a control unit ( 20 ) that controls the inverter circuit ( 13 b ), based on an electric quantity detection signal from the electric quantity detector

Electric Power Converter

A power inverter for use in the system interconnection of a direct-current supply with a commercial alternating-current supply includes an inverter circuit and a filter circuit. Feedback signals affecting the frequency of an output to be produced by the inverter circuit are taken from the filter circuit having frequency response characteristics such that the phase angle is reduced to 0° at three frequencies consisting of a higher frequency, lower frequency and commercial frequency, the last of which lies halfway between the first and second. Under the normal condition, the frequency of the output produced by the inverter circuit is equal to the commercial frequency. In the event of a power failure or power cut in the commercial alternating-current supply system, deviation from the commercial frequency is caused by the characteristics of the filter circuit.

Ding Lu

Papers

Power inverter for use in system interconnection

Twin Peaks Band-Pass-Filter as Protection for Islanding of Inverter Connected to Utility Line