Abstract: An wood-gas power supply system include: a rectifier filter electrically coupled to a output power terminal of the wood-gas stove; a maximum power tracking circuit electrically coupled to the rectifier filter, providing a larger power; a feedback controller electrically coupled to the rectifier filter and the maximum power tracking circuit, allowing the power reach a request power value; and a DC/DC charging device receiving a current flowing the maximum power tracking circuit and converting the current to a direct current. The wood-gas power supply system applies energy storage elements and peripheral circuits to perform the closed loop control so as to adjust the output power for transmitting the steady output voltage, and to achieve the purpose of providing the steady power.

Abstract: A power monitor and management system includes an automatic modulation device, a monitoring device, multiple modules and an LAN (local area network) connected to the monitoring device and the modules to enable the monitoring device to communicate with the modules. The automatic modulation device determines a dominating module in according to registration sequences of the modules and subordinating modules and to modulate power of the dominating module and the subordinating modules as well as the overall power output in accordance with number of the modules.

Abstract: A half-bridge dc/dc converter includes a first converter receiving a current and generating a first resonant current; a transformer connecting to the first converter, receiving the first resonant current and generating a second resonant current; and a second converter connecting to the transformer, receiving the second resonant current; wherein the pulse width of currents in the first converter and second convert are adjustable to further stabilize voltage level as well as adjust output power of the transformer for zero voltage switching operation.

Abstract: A power consuming management system installed between a power outlet and at least one load includes an electricity meter connected between the power outlet and the at least one load for detection of power consumption and distribution of power to the at least one load, a charger connected to the power outlet, a power saving element connected to the charger, an energy recovery module connected to the power saving element and the electricity meter and a controller connected to the charger, the power saving element, the energy recovery module and the electricity meter to form a loop.

Abstract: A digital programmable control system, which is composed of a micro control module receives a detection result by using a detection module to detect a voltage and a current on a battery module and a bus module, and a judgment program in the micro control module determines whether the detection result meets a switching condition, and generates a control signal to control a bidirectional conversion module to perform a switching procedure in order to achieve the purpose of high accuracy regulation voltage and current.

Abstract: A composite type multi-mode electronic seal includes the bolt, the bolt male pedestal and the communication control part, and the advantage of the composite type multi-mode electronic seal containing the passive electronic seal containing the bolt and the bolt male pedestal and the active electronic seal containing bolt, the bolt male pedestal and the communication control part. Thereby, the present invention has the advantages and preferred result of the active and passive electronic seal, and can help the container cars, bonded cars, trucks and the like to perform the goods transmission, and it still perform the data read and data report according to the different RFID identification equipments built by every country's custom so to achieve the purpose of effectively recording the broken elements, instantly reporting and preventing smuggling.