Abstract: The present invention discloses a power conversion circuit. A control module controls a pulse width modulation regulator to regulate a duty cycle of a DC-DC converter according to the direct current link voltage of the DC-DC converter and the output current and voltage of a renewable power supply. The control module also controls the pulse width modulation regulator to regulate a duty cycle of a DC-AC inverter according to the direct current link voltage of the DC-DC converter, output voltage of a utility power supply, and the output current and voltage of the renewable power supply.

Abstract: The present invention discloses a fuel-cell-based cogeneration system with radio frequency identification (RFID) sensors. The fuel-cell-based cogeneration system with RFID sensors includes the fuel-cell-based cogeneration system and an RFID data processing system. The RFID data processing system captures data of the temperature and flow rate from the RFID sensors, while the system data are in turn converted into RFID signals. The RFID data processing system transmits a control signal generated from the RFID signal to control the operation of the fuel-cell-based cogeneration system. Since the RFID transmission technology, the sensor error caused by wires is consequently reduced. Furthermore, overall sensitivity and accuracy of the RFID sensors are increased, which leads to an accompanying increase in the stability of the operating system.

Abstract: A charge-controlling system and a method therefor are applicable to a backup power system having a fuel-cell-based power supply and a battery. The charge-controlling system includes a bidirectional converter, a feedback circuit, a voltage controller, a PWM generator, a switch unit and an over-charging protection circuit. The feedback circuit generates a feedback signal corresponding to an output voltage of the bidirectional converter. The voltage controller generates a control voltage according to the feedback signal and a constant voltage, such that the PWM generator generates a PWM signal based on the control voltage. The over-charging protection circuit controls operation of the switch unit according to the feedback signal and a saturation voltage of the battery. When the switch unit electrically connects the bidirectional converter and the PWM generator, the bidirectional converter charges the battery with the power generated by the fuel-cell-based power supply according to the PWM signal.

Abstract: A system of a plurality of series-connected fuel cell converter devices and a method for controlling the system are provided. The system includes a plurality of fuel cell converter devices, a series connection unit, a power control unit, a Mux control unit, and a master controller. The output ends of a plurality of fuel cell converter devices are connected in series by the series connection unit. The master controller reads signals from the power control unit and the Mux control unit and determines accordingly which fuel cell converter devices need to be turned on to meet the requirement of a load. The method includes the steps of estimating a load, determining the number of the fuel cell converter devices to be turned on, calculating an output power, discharging, and charging. Thus, a plurality of fuel cell converter devices is controlled to output the required power of the load.

Abstract: A system of a plurality of parallel-connected fuel cell converter devices and a method for controlling the system are provided. The system includes a plurality of fuel cell converter devices, a parallel connection unit, a power control unit, a Mux control unit, and a master controller. The output ends of the plurality of fuel cell converter devices are connected in parallel by the parallel connection unit. The master controller reads signals from the power control unit and the Mux control unit and determines accordingly which fuel cell converter devices need to be turned on to meet the requirement of a load. The method includes the steps of estimating a load, determining the number of the fuel cell converter devices to be turned on, calculating an output power, discharging, and charging. Thus, the plurality of fuel cell converter devices is controlled to output the required power of the load.

Abstract: An analysis method for a regional image is disclosed for an image datum from a C-arm device. The analysis method includes: providing an indication module, reading the image datum, selecting a plurality of ROIs (Regions of Interest), calculating an average brightness of each of the ROIs, searching every of the steel ball image data, comparing each of the steel ball image data and analyzing each of the steel ball image data. By individually analyzing the regional image datum, the brighter or darker image signal can be excluded so that it can improve precision during searching the steel ball image data. Moreover, it is also more effective for comparing an image profile of the steel ball image datum with a real profile of the steel ball of the indication module. Thus, the steel ball image can be readily defined by its correspondence with the steel ball of the indication module.

Abstract: A linear modulation voltage transformer circuitry includes a power stage unit, a voltage division unit, a linear modulation unit, an error amplifier, and a recursive controller. The power stage unit adapts an input voltage and outputs a first voltage to the voltage division unit, which outputs a divided voltage. The linear modulation unit receives the divided voltage, compares it with a control voltage, and outputs an error voltage signal to the error amplifier, which amplifies the error voltage signal as an error gain control signal. The recursive controller receives and modulates the error gain control signal and outputs the modulation error gain control signal to the power stage unit as a reference signal so as for the power stage unit to modulate the first voltage. Thus, the first voltage can be varied in real time via the linear modulation unit to meet load demands.

Abstract: A power supply system and a fuel cell backup power system thereof are provided. The power supply system includes: a mains power supply module for providing mains electricity to a load, and a fuel cell backup power system for providing electricity to the load while the mains electricity provided by the mains power supply module is insufficient. The fuel cell backup power system includes a fuel cell system, a power conditioning module, a battery, and a controller. The fuel cell system and the battery output first and second electrical energy, respectively. The controller defines a plurality of output power requirement levels for the fuel cell system, reads the power required by the load, and adjusts the output ratio between the first and the second electrical energy in a stepwise manner according to the output power requirement levels so as to meet the power required by the load.

Abstract: The present invention discloses a power conversion circuit. A control module controls a pulse width modulation regulator to regulate a duty cycle of a DC-DC converter according to the direct current link voltage of the DC-DC converter and the output current and voltage of a renewable power supply. The control module also controls the pulse width modulation regulator to regulate a duty cycle of a DC-AC inverter according to the direct current link voltage of the DC-DC converter, output voltage of a utility power supply, and the output current and voltage of the renewable power supply.

Abstract: The present invention discloses a method for controlling an adsorption air conditioning equipment. To execute consecutive programs, the adsorption air conditioning equipment performs the steps of: selecting one of a plurality of operation programs according to an execution sequence such that the selected operation program acts as an executable operation program; enabling at least two adsorption beds to operate in response to an executed operation program; switching to the next operation program in the execution sequence according to the operation time of the executed operation program such that the next operation program acts as the next executable operation program; controlling the switching of a plurality of valves according to the executed operation program; enabling the adsorption beds to operate in response to the executed operation program; and switching and executing the operation programs repeatedly until all the operation programs in the execution sequence are completely executed.

Abstract: The present invention discloses an adsorption type refrigerator that automatically determines the switchover point. The adsorption type refrigerator includes a first vacuum chamber, a second vacuum chamber, a third vacuum chamber and a waterway structure. The waterway structure is connected to a first adsorption bed in the first vacuum chamber and a second adsorption bed in the second vacuum chamber. The waterway structure simultaneously conveys hot water into the first adsorption bed and cold water into the second adsorption bed, or simultaneously conveys cold water into the first adsorption bed and hot water into the second adsorption bed so as to allow the first and the second adsorption beds to conduct adsorption and desorption alternatively. This alternation creates pressure variation in the three vacuum chambers, which is then utilized to automatically determine the switchover point at which the refrigerator can provide and maintain a cold, stable environment.

Abstract: A charge-controlling system and a method therefor are applicable to a backup power system having a fuel-cell-based power supply and a battery. The charge-controlling system includes a bidirectional converter, a feedback circuit, a voltage controller, a PWM generator, a switch unit and an over-charging protection circuit. The feedback circuit generates a feedback signal corresponding to an output voltage of the bidirectional converter. The voltage controller generates a control voltage according to the feedback signal and a constant voltage, such that the PWM generator generates a PWM signal based on the control voltage. The over-charging protection circuit controls operation of the switch unit according to the feedback signal and a saturation voltage of the battery. When the switch unit electrically connects the bidirectional converter and the PWM generator, the bidirectional converter charges the battery with the power generated by the fuel-cell-based power supply according to the PWM signal.

Abstract: The present invention discloses a fuel-cell-based cogeneration system with radio frequency identification (RFID) sensors. The fuel-cell-based cogeneration system with RFID sensors includes the fuel-cell-based cogeneration system and an RFID data processing system. The RFID data processing system captures data of the temperature and flow rate from the RFID sensors, while the system data are in turn converted into RFID signals. The RFID data processing system transmits a control signal generated from the RFID signal to control the operation of the fuel-cell-based cogeneration system. Since the RFID transmission technology, the sensor error caused by wires is consequently reduced. Furthermore, overall sensitivity and accuracy of the RFID sensors are increased, which leads to an accompanying increase in the stability of the operating system.

Abstract: An adsorption type refrigerator with thermostatic control includes a first vacuum chamber, a second vacuum chamber, a third vacuum chamber, and a passage structure. The first vacuum chamber accommodates a first adsorption bed, a first condenser, and a first evaporator, and the second vacuum chamber accommodates a second adsorption bed, a second condenser, and a second evaporator. The third vacuum chamber contains a third evaporator. The passage structure guides hot water into the first adsorption bed and guides cold water into the second adsorption bed simultaneously, or guides the cold water into the first adsorption bed and guides the hot water into the second adsorption bed simultaneously. According to the ambient temperature or the temperature of ice water produced by the adsorption refrigerator, the cold water is stopped being guided into the first or the second adsorption bed timely, thereby ceasing the refrigeration temporarily and achieving the thermostatic control.

Abstract: An image capture system for recording X-ray images in real time is disclosed. The image capture system includes an image pickup device, a sensing module and a surgical navigation device. The sensing module is used to detect the on/off status of the image pickup device. While the image pickup device is turned on to capture an X-ray image, the sensing module transmits a notification signal to the surgical navigation device. After receiving the notification signal, the surgical navigation device records the X-ray image captured by the image pickup device and the relative position between the image pickup device and the patient in real time. Thus, the real-time recording of the relative position between the image pickup device and the patient will prevent inaccurate image reading that occurs when the patient's position and image pickup device shift after the X-ray image has been captured.

Abstract: A backup power system with a fuel cell and a control method thereof are provided. The control method includes the steps of: setting a default variation value; determining whether power interruption has happened to a grid power module; determining whether a load is functioning; performing a limiting step; and controlling the output of a fuel cell system. With the control method, the fuel cell system functions as a backup power system configured for grid power, and the fuel cell system generates power in response to variation of the load.

Abstract: A voltage regulator for a fuel cell and a method therefor are disclosed. Inputs of converters are connected to the fuel cell in parallel and outputs of the converters are connected between a positive terminal and a negative terminal of a load in series. The output of the fuel cell is converted by the converters and combined to output as an output voltage, which is provided to the load as a working voltage of the load. A control circuit in the voltage regulator receives a feedback signal related to the output voltage to feedback control the converters, such that each converter outputs the same constant voltage.

Abstract: A grid-connected power conversion circuitry and a power conversion method thereof are disclosed. A DC-DC converter converts a renewable energy into a stable and constant DC power. A DC-AC inverter inverts the DC power into an AC power. The duty cycle of the DC-DC converter is adjusted based on a feedback signal related to the DC power, thereby stabilizing the output of the DC-DC converter. The duty cycle of the DC-AC inverter is adjusted based on a feedback signal related to the AC power as well as the phase angle of grid power that is in turn detected by a phase angle processor. Consequently, the AC power can be synchronized with the grid power in frequency. Therefore, the grid system provides auxiliary power when the renewable energy is insufficient, and the AC power output by the DC-AC inverter is synchronized with the grid power in frequency.

Abstract: A system of a plurality of parallel-connected fuel cell converter devices and a method for controlling the system are provided. The system includes a plurality of fuel cell converter devices, a parallel connection unit, a power control unit, a Mux control unit, and a master controller. The output ends of the plurality of fuel cell converter devices are connected in parallel by the parallel connection unit. The master controller reads signals from the power control unit and the Mux control unit and determines accordingly which fuel cell converter devices need to be turned on to meet the requirement of a load. The method includes the steps of estimating a load, determining the number of the fuel cell converter devices to be turned on, calculating an output power, discharging, and charging. Thus, the plurality of fuel cell converter devices is controlled to output the required power of the load.

Abstract: A split solid adsorption cooling system is disclosed. The split solid adsorption cooling system includes a first adsorption unit, a second adsorption unit, and a shell-and-tube heat exchanger. The first and the second adsorption units are connected to each other via a first pipeline and a second pipeline of the shell-and-tube heat exchanger. While adsorption and desorption take place alternately in the first and the second adsorption units, the temperature of the first and the second pipelines is lowered, thereby decreasing the temperature of water flowing in the shell-and-tube heat exchanger. In addition, the manufacturing costs of the split solid adsorption cooling system can be lowered because the shell-and-tube heat exchanger need not be operated in a vacuum environment. Furthermore, as the shell-and-tube heat exchanger is separate from the first and the second adsorption units, the overall system volume is reduced.