摘要:
A cyclic A/D converter which can reduce the number of reference voltages for D/A conversion is provided. The cyclic A/D converter (11) comprises a gain stage (15), an A/D converter circuit (17), a logic circuit (19), and a D/A converter circuit (21). In an operational action of the gain stage (15), an operational value (VOP) is generated by the use of an operational amplifier circuit (23) and capacitors (25, 27, 29). The gain stage (15) operates as receiving three kinds of voltage signal from the D/A converter circuit (21) by the switching of two kinds of voltage signal (VDA1, VDA2) to be applied to the capacitors (25, 27) in a switching circuit (31). That is, the D/A converter circuit (21) provides a voltage signal (VRH) to the capacitors (25, 27), in response to a value (D=2) of a digital signal (B0, B1), provides voltage signals (VRH, VRL) to the capacitors (25, 27), respectively, in response to a value (D=1) of the signal (B0, B1), and provides the voltage signal (VRL) to the capacitors (25, 27), in response to a value (D=0) of the signal (B0, B1).
摘要:
A cyclic A/D converter which can reduce the number of reference voltages for D/A conversion is provided. The cyclic A/D converter (11) comprises a gain stage (15), an A/D converter circuit (17), a logic circuit (19), and a D/A converter circuit (21). In an operational action of the gain stage (15), an operational value (VOP) is generated by the use of an operational amplifier circuit (23) and capacitors (25, 27, 29). The gain stage (15) operates as receiving three kinds of voltage signal from the D/A converter circuit (21) by the switching of two kinds of voltage signal (VDA1, VDA2) to be applied to the capacitors (25, 27) in a switching circuit (31). That is, the D/A converter circuit (21) provides a voltage signal (VRH) to the capacitors (25, 27), in response to a value (D=2) of a digital signal (B0, B1), provides voltage signals (VRH, VRL) to the capacitors (25, 27), respectively, in response to a value (D=1) of the signal (B0, B1), and provides the voltage signal (VRL) to the capacitors (25, 27), in response to a value (D=0) of the signal (B0, B1).
摘要:
A hydrogen-permeable structure is disclosed, which includes a hydrogen-permeable base in which a fluctuation range of a d value by X-ray analysis measurement is at most 0.05% in a region within 2 μm deep from a surface, and an oxide proton conductive film formed on a surface thereof. The disclosure also relates to a method of manufacturing the hydrogen-permeable structure and a fuel cell using the hydrogen-permeable structure.
摘要:
According to this invention, when initialization of a storage medium such as a flash memory is erase of the data area, the processing can be stopped. When the processing is stopped, at least initialization of the management area has been completed, and processing using the storage medium can be executed. If erase processing is not stopped but proceeds to the end, no erase processing need be performed in writing new data, and high-speed write is promised. For this purpose, when complete formatting is designated, the management area of the file system is first initialized. Then, erase processing for the data area of the file system is executed by a predetermined block size. If it is determined that stop is designated during the data area erase processing, the processing ends, but the management area has already been initialized.
摘要:
A CDA processing section extracts an unused area of an information recording medium via a disc status management section and a drive control section. The CDA processing section divides the extracted unused areas by a division criteria value MAS, which allows continuous reproduction of a video and audio stream, and reserves areas having the size of the division criteria value MAS as CDAs. This enables continuous reproduction of AV data, and multiple data can be recorded simultaneously.
摘要:
A technology for preventing degradation of a hydrogen permeable metal layer in a fuel cell 210 is provided. A fuel cell system 200 including a fuel cell 210 with an anode which has the hydrogen permeable metal layer comprises a fuel cell controller 230 for controlling the operation status of the fuel cell system 200, a temperature parameter acquisition section for acquiring a temperature parameter of the hydrogen permeable metal layer, and a hydrogen permeable metal layer degradation prevention section which reduces the hydrogen partial pressure in an anode channel 212 for supplying fuel gas to the anode. If a temperature of the hydrogen permeable metal layer represented by the temperature parameter deviates from a specified temperature range, the fuel cell controller 230 cause the hydrogen permeable metal layer degradation prevention section to operate for preventing degradation of the hydrogen permeable metal layer.
摘要:
A fuel cell includes a hydrogen permeable metal substrate and an electrolyte layer. The hydrogen permeable metal substrate acts as an anode. The electrolyte layer is provided on the hydrogen permeable metal substrate and has proton conductivity. At least a part of the hydrogen permeable metal substrate is composed of a metal having a recrystallization temperature higher than a given temperature.
摘要:
A control device 7 obtains a reformed carbon quantity C supplied to a reform reaction flow channel 21 from a supplied fuel quantity Qf and also obtains a reformed water quantity S supplied to the reform reaction flow channel 21 from a generated power quantity W. Further, it obtains a oxygen consumed quantity consumed through power generation in a fuel cell 3 from the generated power quantity W, a supplied oxygen quantity to be supplied to a cathode flow channel 33 from a supplied cathode gas quantity Qc, and a reformed oxygen quantity O to be supplied to the reform reaction flow channel 21 based on a difference between the supplied oxygen quantity and the consumed oxygen quantity. By correcting a reformed carbon quantity C (delivery of a fuel pump 51) in accordance with the reformed oxygen quantity O, each of O/C and S/C is kept in a target value range.
摘要:
This invention prevents reduction of hydrogen permeability and deterioration in hydrogen separation members that use an oxygen-containing gas as a cathode off gas and a purge gas. Described is a hydrogen separation device that includes a reformed gas passage, a purge gas passage, and a hydrogen separation membrane. A supply of reformed gas flows through the reformed gas passage. A cathode off gas discharged from a fuel cell cathode flows through the purge gas passage to carry hydrogen transmitted through the hydrogen separation membrane to a fuel cell anode. A portion of the hydrogen separation membrane near the supply of the cathode off gas has enhanced heat resistance that prevents deterioration of the hydrogen separation membrane even when hydrogen transmitted through the membrane reacts with oxygen remaining in the cathode off gas to raise the temperature in the vicinity of the portion close to the supply of the cathode off gas.
摘要:
When the hydrogen separating membrane is in a low temperature condition, a lean bus operation is carried out in a reformer in order to conduct warm-up while suppressing generation of hydrogen. At the timing t1 where the temperature of the hydrogen separator membrane has reached a temperature at which hydrogen embrittlement does not occur, reforming is initiated. In such a condition, oxygen is supplied to hydrogen which is permeated through the hydrogen separator membrane for burning the hydrogen, so as to further facilitate the warm-up. At the timing t2 where the temperature has reached an operation temperature, the supply of oxygen in a purge side is stopped so as to stop the burning of hydrogen, and an operation mode is shifted to a normal operation.