摘要:
In an energy storage device, a charging circuit is electrically coupled to the energy storage section. A first comparator is electrically coupled to an energy storage section, and its output is inverted when voltage Vc of the energy storage section reaches first predetermined voltage Vc1. A second comparator is electrically coupled to the energy storage section, and its output is inverted when voltage Vc of the energy storage section reaches second predetermined voltage Vc2. A control circuit is electrically coupled to the first comparator and the second comparator. The control circuit obtains period tm from inversion of the output of the first comparator to the output of the second comparator. Capacitance C of the energy storage section is calculated based on this period tm and voltage change width ΔVc between the first predetermined voltage Vc1 and the second predetermined voltage Vc2.
摘要:
A vehicle power supply device has a capacitor unit including capacitors storing auxiliary power; a temperature sensor; a charge circuit; a capacitor-unit current detector; a capacitor-unit voltage detector; a controller; a storage; and a determination unit. The determination unit determines the degradation level of the capacitor unit based on at least one of an internal resistance standard value and a corrected calculated value of capacitance. This structure determines degradation of the vehicle power supply device more accurately than ever, so that the device can be used until the end of the actual life.
摘要:
The A/D conversion apparatus and the vehicle power-supply device using the apparatus calculate errors at a plurality of reference voltages and reference errors prior to error correction. Each reference error is applied to a digital-output range that is divided by digital output corresponding to the reference voltages. In the calculation, when the errors obtained at adjacent reference voltages have same signs, the reference error is determined as an average of the errors obtained at adjacent reference voltages; on the other hand, when the errors obtained at adjacent reference voltages have different signs, the reference error is determined to be zero. The apparatus provides a corrected digital output by subtracting the reference error—which is applied to the digital-output range including the digital output—from the digital output corresponding to analog input voltage.
摘要:
In an electrical storage apparatus including an electric storage device connected between a main power supply and a load, a first bypass FET and a bypass diode which are connected in series between the main power supply and the load are provided, and first and second main path FETs connected in series between the electric storage device and the load are provided. A controller judges that the first bypass FET suffers an open-circuit failure if the voltage (Va) of the load is equal to or smaller than the first threshold value Vth1 or if the voltage (Vc) at the connection point between the first bypass FET and the bypass diode is equal to or smaller than the second threshold value Vth2, when the first bypass FET is turned on and the first main path FET and the second main path FET are turned off.
摘要:
In an energy storage device, a charging circuit is electrically coupled to the energy storage section. A first comparator is electrically coupled to an energy storage section, and its output is inverted when voltage Vc of the energy storage section reaches first predetermined voltage Vc1. A second comparator is electrically coupled to the energy storage section, and its output is inverted when voltage Vc of the energy storage section reaches second predetermined voltage Vc2. A control circuit is electrically coupled to the first comparator and the second comparator. The control circuit obtains period tm from inversion of the output of the first comparator to the output of the second comparator. Capacitance C of the energy storage section is calculated based on this period tm and voltage change width ΔVc between the first predetermined voltage Vc1 and the second predetermined voltage Vc2.
摘要:
A vehicle power supply device has a capacitor unit including capacitors storing auxiliary power; a temperature sensor; a charge circuit; a capacitor-unit current detector; a capacitor-unit voltage detector; a controller; a storage; and a determination unit. The determination unit determines the degradation level of the capacitor unit based on at least one of an internal resistance standard value and a corrected calculated value of capacitance. This structure determines degradation of the vehicle power supply device more accurately than ever, so that the device can be used until the end of the actual life.
摘要:
A power supply device has a capacitor unit in which capacitors are interconnected in series, a charging unit for charging the capacitor unit at a constant current, a detecting unit for detecting voltage on the high potential side of each of the capacitors, a determining unit for determining the existence of an abnormality based on the voltage detected by the detecting unit. The determining unit determines the abnormality when the difference between respective voltages on the high potential sides of some adjacent capacitors exceeds upper-limit voltage value Va, when the difference is lower than lower-limit voltage value Vb, or when a voltage is negative.
摘要:
Provided are a novel method and novel apparatus for manufacturing a silicon ingot that make it possible to reduce manufacturing steps and also reduce required electric power. A method for manufacturing a silicon ingot, including the step of heating and melting, in a crucible, an element which can undergo eutectic reaction with silicon and has a lower eutectic point than the melting point of silicon when made into silicon alloy, and a metallic silicon, thereby generating an alloy melt, and the step of using the eutectic reaction for the alloy melt to subject the silicon to low-temperature solidification refinement, and further producing the silicon ingot from the alloy melt by a pulling method is provided.
摘要:
According to the configuration and the manufacturing method of forming a moisture proof agent on both surfaces of a circuit substrate after soldering a capacitor connection pin in a vertical direction to the circuit substrate, and electrically connecting the capacitor so as to be in a perpendicular direction to the length direction of the capacitor connection pin at the upper space of the circuit substrate, the possibility of the moisture proof agent attaching to the capacitor is eliminated, the productivity enhances since the moisture proof agent can be easily formed on both surfaces of the circuit substrate, and a capacitor unit of miniaturized and low height configuration is realized since the capacitor is mounted in the horizontal direction in the upper space with respect to the circuit substrate.
摘要:
A sheet feeding device includes a tray main body and a cover member. The tray main body has a first mount surface. The cover member is rotatably connected to an end of the tray main body on the side opposite to the sheet feeding side so that the cover member can move rotationally between a closed position where the cover member covers the first mount surface and an open position where the first mount surface is exposed, and has a second mount surface on which a sheet is mounted over the first mount surface when cover member is in the open position. The cover member includes an opening for sheet insertion which penetrates through from an upper surface to a bottom surface of the cover member so that a sheet can be inserted onto the first mount surface when the cover member is in the closed position.