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    • 61. 发明授权
    • Fuel cell system
    • 燃料电池系统
    • US08906567B2
    • 2014-12-09
    • US13258146
    • 2009-06-08
    • Takahiko HasegawaNobuyuki KitamuraKota Manabe
    • Takahiko HasegawaNobuyuki KitamuraKota Manabe
    • H01M8/04H01M16/00B60L11/18B60L3/00
    • H01M8/04589B60L3/003B60L3/0053B60L11/1881H01M8/04559H01M8/04686H01M16/006Y02E60/50Y02T90/34Y10T307/50
    • The present invention detects a failure in an FC converter. A target voltage determination section determines an output target voltage for a fuel cell. A superimposition signal generation section generates a predetermined reference signal to be superimposed onto the output target voltage. A voltage command signal generation section generates a voltage command signal by superimposing the reference signal onto the output target voltage. A frequency characteristics calculation section calculates the frequency characteristics of the reference signal component superimposed on the output voltage of the fuel cell. A failure judgment section judges that a failure occurs in the FC converter if a value of the calculated frequency characteristics is less than the lower limit threshold value of an allowable range established based on reference characteristics. A gain adjustment section adjusts the gains in the FC converter so that the frequency characteristics calculated by the frequency characteristics calculation section correspond to the reference characteristics.
    • 本发明检测FC转换器的故障。 目标电压确定部确定燃料电池的输出目标电压。 叠加信号生成部生成叠加在输出目标电压上的规定的基准信号。 电压指令信号生成部通过将基准信号叠加在输出目标电压上来生成电压指令信号。 频率特性计算部分计算叠加在燃料电池的输出电压上的参考信号分量的频率特性。 如果所计算的频率特性的值小于基于参考特性建立的允许范围的下限阈值,则故障判断部分判断在FC转换器中发生故障。 增益调整部分调节FC转换器中的增益,使得由频率特性计算部分计算的频率特性对应于参考特性。
    • 62. 发明授权
    • Fuel cell system
    • 燃料电池系统
    • US08658322B2
    • 2014-02-25
    • US11884555
    • 2006-02-22
    • Nobuyuki Kitamura
    • Nobuyuki Kitamura
    • H01M8/06H01M8/04
    • H01M8/04291H01M8/04529H01M8/04559H01M8/04589H01M8/04649H01M8/04731H01M8/04753H01M8/0485
    • In a fuel cell system including a stack of polymer electrolyte fuel cells, the wet state of electrolyte membranes in the fuel cell stack is detected according to a variation in measurement value of an alternating current impedance (AC impedance) of the fuel cell stack. In an adequate level of water content of the electrolyte membranes, the measurement value of the AC impedance is substantially constant and has a very little variation. In an excess level of water content of the electrolyte membranes, the measurement value of the AC impedance has a significant variation. The AC impedance of the fuel cell stack is determinable by frequency analysis of high-frequency noise generated by an inverter included in the fuel cell system.
    • 在包括聚合物电解质燃料电池堆的燃料电池系统中,根据燃料电池堆的交流阻抗(AC阻抗)的测量值的变化来检测燃料电池堆中的电解质膜的湿态。 在电解质膜的水含量足够高时,AC阻抗的测量值基本上是恒定的,并且变化很小。 在电解质膜的含水量过多的情况下,AC阻抗的测量值有显着差异。 燃料电池堆的交流阻抗可以通过由包括在燃料电池系统中的逆变器产生的高频噪声的频率分析来确定。
    • 64. 发明申请
    • CONVERTER CONTROLLER
    • 转换器控制器
    • US20120139522A1
    • 2012-06-07
    • US13383119
    • 2009-07-10
    • Takahiko HasegawaNobuyuki KitamuraKota Manabe
    • Takahiko HasegawaNobuyuki KitamuraKota Manabe
    • G05F3/08
    • H02M3/1584B60L11/1887B60L11/1892H02M1/32H02M1/34H02M2001/0058Y02T10/92Y02T90/34
    • There is disclosed a converter controller which can simply and early detect an abnormality of an auxiliary circuit constituting a soft switching converter. On turning off a first switching element, a controller detects a voltage between both the ends of a snubber capacitor and a voltage between both the ends of the first switching element, to obtain a difference voltage. The controller compares the obtained difference voltage with a voltage threshold value stored in a memory (not shown) to judge whether or not the difference voltage is larger than the voltage threshold value. When the difference voltage is smaller than the voltage threshold value, the controller judges that an auxiliary circuit is normal, to end processing, whereas when the difference voltage is not less than the voltage threshold value, the controller judges that a failure (an open failure) occurs in the auxiliary circuit, to shift to a fail safe operation, thereby ending the processing.
    • 公开了一种转换器控制器,其可以简单且早期地检测构成软开关转换器的辅助电路的异常。 在关闭第一开关元件时,控制器检测缓冲电容器的两端之间的电压和第一开关元件的两端之间的电压,以获得差分电压。 控制器将获得的差分电压与存储在存储器(未示出)中的电压阈值进行比较,以判断差分电压是否大于电压阈值。 当差值电压小于电压阈值时,控制器判断辅助电路是正常的,以结束处理,而当差值电压不小于电压阈值时,控制器判断故障(开路故障 )发生在辅助电路中,以转移到故障安全操作,从而结束处理。
    • 67. 发明授权
    • Fuel cell system
    • 燃料电池系统
    • US07824815B2
    • 2010-11-02
    • US11547246
    • 2005-04-07
    • Daisuke YamazakiToyokazu BaikaNobuo WatanabeNobuyuki Kitamura
    • Daisuke YamazakiToyokazu BaikaNobuo WatanabeNobuyuki Kitamura
    • H01M8/04
    • H01M8/04097
    • A fuel cell system (10, 200) includes an intake pipe (45, 46) that admits an introduction of oxidizing gas upstream of an oxidizing gas supply source that supplies the oxidizing gas to a fuel cell (20), and an exhaust pipe (51, 52, 221, 222) that discharges exhaust gas which contains a vapor generated at an oxygen electrode side through an operation of the fuel cell (20). The fuel cell system (10, 200) is provided with a circulating pipe (61, 62, 220) that connects the intake pipe and the exhaust pipe (51, 52, 221, 222), a circulating valve (60) that is provided in the circulating pipe and operated to adjust a flow rate of the exhaust gas supplied from the exhaust pipe (51, 52, 221, 222) to the intake pipe, and a pressure generating member that is provided in the exhaust pipe (51, 52, 221, 222) at a position at which the circulating pipe and the exhaust pipe (51, 52, 221, 222) are joined and generates a pressure that is higher than at least an atmospheric pressure.
    • 燃料电池系统(10,200)包括进气管(45,46),其允许将氧化气体供应源的上游的氧化气体引入燃料电池(20),并且排气管 51,52,221,222),其通过所述燃料电池(20)的动作排出包含在氧电极侧产生的蒸汽的废气。 燃料电池系统(10,200)设置有连接进气管和排气管(51,52,221,222)的循环管(61,62,220),设置有循环阀(60) 在所述循环管中并且将从所述排气管(51,52,221,222)供给的废气的流量调节到所述进气管的操作,以及设置在所述排气管(51,52)中的压力发生部件 ,221,222),在循环管和排气管(51,52,221,222)的接合位置处产生高于至少大气压的压力。