Semiconductor ceramic and positive-temperature-coefficient thermistor

    公开(公告)号:US06522238B2

    公开(公告)日:2003-02-18

    申请号:US09903037

    申请日:2001-07-11

    IPC分类号: H01C710

    CPC分类号: H01C7/025

    摘要: A semiconductor ceramic contains erbium as a semiconducting agent in primary components of barium titanate, strontium titanate, lead titanate and calcium titanate, with the average grain diameter of the semiconductor ceramic exceeding about 5 &mgr;m but not exceeding about 14 &mgr;m. Further, the semiconductor ceramic contains as additives a compound containing Er with the Er being more than about 0.10 mol but no more than about 0.33 mol, a compound containing Mn with the Mn being about 0.01 mol or more but no more than about 0.03 mol, and a compound containing Si with the Si being about 1.0 mol or more but no more than about 5.0 mol, per 100 mol of the primary component. Thus, a semiconductor ceramic and positive-temperature-coefficient thermistor can be provided with high-flash-breakdown capability, excellent results in ON-OFF application tests and few irregularities in resistance values.

    DC source system with solar cell, and its operation method
    13.
    发明授权
    DC source system with solar cell, and its operation method 失效
    具有太阳能电池的直流源系统及其运行方法

    公开(公告)号:US5986354A

    公开(公告)日:1999-11-16

    申请号:US637213

    申请日:1996-04-24

    摘要: In order to prevent a device serving as a load from being destroyed or causing an operation error while assuring an optimum operation voltage of a solar cell, and to stably, efficiently obtain power, a DC source system, in which a solar cell (1) and a DC source (3) are connected to an output terminal connected to a load (2) in parallel with each other, includes a first switch (5) arranged between the load (2) and the solar cell (1), a second switch 7 arranged between the load (2) and the DC source, and a capacitor (6) arranged between the load and the first switch in parallel with the solar cell.

    摘要翻译: 为了防止作为负载的装置在确保太阳能电池的最佳工作电压的同时被破坏或引起操作错误,并且为了稳定地有效地获得电力,可以使用太阳能电池(1)的DC源系统, 和DC源(3)连接到彼此并联连接到负载(2)的输出端子,包括布置在负载(2)和太阳能电池(1)之间的第一开关(5),第二开关 布置在负载(2)和DC源之间的开关7以及与太阳能电池并联布置在负载和第一开关之间的电容器(6)。

    Voltage control apparatus and method for power supply
    14.
    发明授权
    Voltage control apparatus and method for power supply 失效
    电源控制装置及方法

    公开(公告)号:US5892354A

    公开(公告)日:1999-04-06

    申请号:US717330

    申请日:1996-09-20

    摘要: A voltage control apparatus which is robust against disturbances such as variations in solar radiation amount around a solar cell, and has quick response, has a voltage detection unit (4) for detecting the voltage value of a battery power supply (1), a power conversion unit (2) for performing predetermined conversion of electric power supplied from the battery power supply, and supplying the converted electric power to a load or a commercial AC system (3), an output setting unit (5) for setting the output value of the power conversion unit on the basis of the voltage detection value, and a control unit (6) for controlling the power conversion unit on the basis of the output setting value. The output setting unit is constituted by a target voltage setting unit (51) for setting the target voltage value of the battery power supply, and an output calculation unit (52) for calculating the output setting value on the basis of the deviation between the voltage detection value and the target voltage value.

    摘要翻译: 一种对太阳能电池周围的太阳辐射量的变化等抗扰性强的电压控制装置,具有快速响应的电压控制装置,具有检测电池电源(1)的电压值的电压检测单元(4) 转换单元(2),用于执行从电池电源供应的电力的预定转换,并将转换的电力提供给负载或商用AC系统(3);输出设定单元(5),用于将输出值 基于电压检测值的功率转换单元,以及用于基于输出设定值控制功率转换单元的控制单元(6)。 输出设定单元由用于设定电池电源的目标电压值的目标电压设定单元(51)和输出计算单元(52)构成,该输出计算单元基于电压 检测值和目标电压值。

    Solar power generation apparatus and power control device therefor
    15.
    发明授权
    Solar power generation apparatus and power control device therefor 失效
    太阳能发电装置及其功率控制装置

    公开(公告)号:US5869956A

    公开(公告)日:1999-02-09

    申请号:US922550

    申请日:1997-09-03

    IPC分类号: G05F1/67 H02M7/48 G05F5/00

    CPC分类号: G05F1/67 Y02E10/58

    摘要: In order to extract maximum power from a solar cell, maximum power point tracking (MPPT) control is performed under ordinary circumstances. If the output current of the solar cell becomes too small, the operating point of the solar cell is caused to fluctuate over a range wider than that of MPPT control at a period longer than that of MPPT control and the output voltage and current of the solar cell is sampled. In a case where it is indicated by power values obtained from the sample voltage values and current values that a plurality of maximal points of power value exist, a voltage value corresponding to a power value indicative of the largest value is set as the operating point of the solar cell.

    摘要翻译: 为了从太阳能电池提取最大功率,在一般情况下执行最大功率点跟踪(MPPT)控制。 如果太阳能电池的输出电流变得太小,则太阳能电池的工作点在比MPPT控制的时间长的范围内比MPPT控制的工作点波动,并且太阳能电池的输出电压和电流 对单元进行采样。 在由从采样电压值和电流值获得的功率值表示存在多个功率值的最大值的情况下,将表示最大值的功率值对应的电压值设定为 太阳能电池。

    Electric power supplying apparatus using unstable electric power supply and control method therefor
    16.
    发明授权
    Electric power supplying apparatus using unstable electric power supply and control method therefor 失效
    使用不稳定电源的供电装置及其控制方法

    公开(公告)号:US06590793B1

    公开(公告)日:2003-07-08

    申请号:US08914227

    申请日:1997-08-19

    IPC分类号: H02M324

    CPC分类号: H02J7/35 Y02E10/58

    摘要: An electric power conversion unit 2 for driving a pump 3 run by electric power generated by a solar panel 1, a storage battery 5 connected to the solar panel 1 via the switch 6, and a controller 7 for controlling the electric power conversion unit 2 and the switch 6 are provided. The controller 7 closes the switch 6 during any period when the amount of insolation is large and performs the maximum power point tracking control of the solar panel 1, and otherwise, controls the electric power conversion unit 2 to drive at one of plural fixed frequencies in dependence upon an output voltage from the solar panel 1 by closing the switch 6. Accordingly, it is possible to utilize output from an unstable electric power supply efficiently, such as a solar cell, thereby providing a reliable electric motor driving apparatus having a simple configuration and a control method therefor.

    摘要翻译: 用于驱动由太阳能电池板1产生的电力运行的泵3的电力转换单元2,经由开关6连接到太阳能电池板1的蓄电池5以及用于控制电力转换单元2的控制器7以及 提供开关6。 在日照量大的任何期间,控制器7关闭开关6,进行太阳能电池板1的最大功率点跟踪控制,否则,控制电力转换单元2以多个固定频率 通过关闭开关6来依赖于太阳能电池板1的输出电压。因此,可以有效地利用诸如太阳能电池的不稳定电源的输出,从而提供具有简单配置的可靠的电动机驱动装置 及其控制方法。

    Semiconductor ceramic and semiconductor ceramic device
    17.
    发明授权
    Semiconductor ceramic and semiconductor ceramic device 有权
    半导体陶瓷和半导体陶瓷器件

    公开(公告)号:US06432558B1

    公开(公告)日:2002-08-13

    申请号:US09634086

    申请日:2000-08-08

    IPC分类号: C04B34468

    摘要: A semiconductor ceramic device comprises a body composed of a semiconductor ceramic having a positive resistance-temperature coefficient primarily composed of barium titanate and electrodes provided on the body, in which the resistance-temperature coefficient is 9%/° C. or more, resistivity is 3.5 ∩·cm or less, and withstand voltage is 50 V/mm or more. As the semiconductor ceramic forming the body provided in a thermistor having positive resistance-temperature characteristics, a semiconductor ceramic having a positive resistance-temperature coefficient is used, in which the semiconductor ceramic has an average particle diameter of about 7 to 12 &mgr;m and comprises barium titanate as a major component and sodium in an amount of about 70 ppm or less on a weight basis.

    摘要翻译: 半导体陶瓷器件包括由主要由钛酸钡构成的正电阻温度系数的半导体陶瓷和设置在本体上的电极组成的本体,其中电阻温度系数为9%/℃以上,电阻率为 3.5∩.cm以下,耐压为50 V / mm以上。 作为形成具有正电阻温度特性的热敏电阻的本体的半导体陶瓷,使用具有正电阻温度系数的半导体陶瓷,其中半导体陶瓷的平均粒径为7〜12μm左右, 钛酸盐作为主要成分,以重量计约70ppm以下的钠。

    Charge control apparatus
    18.
    发明授权
    Charge control apparatus 失效
    充电控制装置

    公开(公告)号:US6051954A

    公开(公告)日:2000-04-18

    申请号:US86796

    申请日:1998-05-29

    摘要: The control unit of a charge control apparatus for controlling charge of a storage battery connected in parallel to a solar cell panel has a voltage detector and a reference voltage generator for generating a reference voltage, both of which are connected in parallel to the storage battery, a delay device for delaying the output signal from the voltage detector by a predetermined time, and a comparator for comparing the signal delayed by the delay device with a reference signal generated by the reference voltage generator and controlling, in accordance with the comparison result, opening/closing of a switch for short-circuiting the output from the solar cell panel. With this simple arrangement, devices in the charge control apparatus can be protected even when the storage battery is disconnected for maintenance or the like.

    摘要翻译: 用于控制与太阳能电池板并联连接的蓄电池的充电的充电控制装置的控制单元具有用于产生参考电压的电压检测器和参考电压发生器,两者都与蓄电池并联连接, 用于将来自电压检测器的输出信号延迟预定时间的延迟装置,以及用于将由延迟装置延迟的信号与由参考电压发生器产生的参考信号进行比较的比较器,并根据比较结果控制开路 /关闭用于使太阳能电池板的输出短路的开关。 通过这种简单的布置,即使在将蓄电池断开以进行维护等时,也可以保护充电控制装置中的装置。

    Conveying apparatus using unstable electric power supply
    19.
    发明授权
    Conveying apparatus using unstable electric power supply 失效
    使用不稳定电源的输送设备

    公开(公告)号:US6050779A

    公开(公告)日:2000-04-18

    申请号:US833992

    申请日:1997-04-09

    CPC分类号: F04B17/006

    摘要: A conveying system comprising a pump whose power source is an unstable electric power supply, such as a solar cell; a first supply pipe for conveying liquid from an intake to the pump; a second supply pipe for conveying the liquid from the pump to a discharge opening; a liquid storage tank provided at a position which is below the discharge opening and above the pump; a third supply pipe branching from the second supply pipe, for conveying the liquid to the liquid storage tank; a fourth supply pipe connected between the liquid storage tank and the first supply pipe; a first valve, provided between the branching point of the first and fourth supply pipes and the intake, for opening and closing the first supply pipe; a second valve, provided between the branching point of the second and third supply pipes and the discharge opening, for opening and closing the second supply pipe; a third valve for opening and closing the third supply pipe; and a fourth valve for opening and closing the fourth supply pipe. The conveying system is capable of conveying liquid, fine powder, and so on, at high efficiency with a single pump even when available electric power supplied from the unstable electric power supply is low by performing open/close control of the second and fourth valves.

    摘要翻译: 一种输送系统,包括其电源是诸如太阳能电池的不稳定电源的泵; 用于将液体从入口输送到泵的第一供应管; 用于将液体从泵输送到排出口的第二供给管; 液体储存罐,设置在排出口下方并位于泵上方的位置; 从所述第二供给管分支的用于将液体输送到所述液体储存罐的第三供给管; 连接在液体储存罐和第一供给管之间的第四供给管; 第一阀,设置在第一和第四供给管的分支点与进气口之间,用于打开和关闭第一供应管; 第二阀,设置在第二和第三供给管的分支点与排出口之间,用于打开和关闭第二供应管; 用于打开和关闭第三供应管的第三阀; 以及用于打开和关闭第四供应管的第四阀。 即使通过对第二阀和第四阀的打开/关闭控制,由不稳定电源供给的可用电力较低,输送系统能够以单个泵高效地输送液体,细粉等。