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    • 92. 发明授权
    • Voltage clamp snubbers for three level converter
    • 三电平转换器的电压钳位缓冲器
    • US5982646A
    • 1999-11-09
    • US108043
    • 1998-06-30
    • James Patrick LyonsPaul Martin EspelageVlatko VlatkovicJing Wang
    • James Patrick LyonsPaul Martin EspelageVlatko VlatkovicJing Wang
    • H02M1/34H02M7/48H02M7/487H02M7/521
    • H02M7/487H02M1/34H02M2001/346Y02B70/1491
    • A three-level NPC converter includes at least one phase leg including four series coupled electrical switches having a first pair junction between the first two switches and a second pair junction between the second two switches. First and second inner switch snubber capacitors are coupled in series at a neutral junction. First and second inner switch snubber diodes are respectively coupled to the first and second pair junctions and respectively coupled at first and second inner diode-capacitor junctions to the first and second inner switch snubber capacitors. First and second inner switch snubber resistors are respectively coupled between the first and second inner diode-capacitor junctions and respective portions of a DC bus. In one embodiment, the NPC converter further includes first and second outer switch snubber diodes coupled between respective first and second inner diode-capacitor junctions and respective portions of the DC bus. This embodiment may further include first and second outer switch snubber capacitors coupled in parallel with respective first and second inner switch snubber capacitors.
    • 三电平NPC转换器包括至少一个相位支路,包括四个串联耦合的电开关,该电气开关具有在前两个开关之间的第一对结和第二个两个开关之间的第二对结。 第一和第二内部开关缓冲电容器在中性点处串联耦合。 第一和第二内部开关缓冲二极管分别耦合到第一和第二对结,并且分别在第一和第二内部二极管 - 电容器结处耦合到第一和第二内部开关缓冲电容器。 第一和第二内部开关缓冲电阻分别耦合在第一和第二内部二极管 - 电容器接头和DC总线的相应部分之间。 在一个实施例中,NPC转换器还包括耦合在相应的第一和第二内部二极管 - 电容器结之间的第一和第二外部开关缓冲二极管以及DC总线的相应部分。 该实施例还可以包括与相应的第一和第二内部开关缓冲电容器并联耦合的第一和第二外部开关缓冲电容器。
    • 98. 发明授权
    • Method for regulating the structure and properties of the composite nanoabsorbent
    • 用于调节复合纳米吸收剂的结构和性能的方法
    • US09387458B2
    • 2016-07-12
    • US13818834
    • 2011-11-04
    • Bingcai PanJing WangShujuan ZhangLu LvWeiming Zhang
    • Bingcai PanJing WangShujuan ZhangLu LvWeiming Zhang
    • B01J20/32C02F1/28B01J20/06B01J20/26C02F101/10C02F101/20
    • B01J20/3295B01J20/06B01J20/267B01J20/321B01J20/3236C02F1/288C02F2101/103C02F2101/20C02F2305/08
    • A method for regulating the structure and properties of the composite nanoabsorbent is provided. This method uses nanoporous chloromethylated polystyrene-divinylbenzene beads as the support material and adopts in situ precipitation method to load dissociative functional nanoparticles thereon; the composite nanoabsorbent of different absorption capacity and absorption speed can be prepared through regulating the pore structure, which is realized herein by means of starting crosslinking reactions through heating chloromethylated beads under existence of the swelling agent and the catalyst; through changing the proportions of different components in the reaction system, modes of heating and time of reaction, the polymer support with different pore structures can be prepared. This invention can successfully regulate the distribution and size of inorganic nanoparticles; the composite nanomaterials prepared by the resin of different degrees of crosslinking present different structures and properties, and the specific structure and properties can be selected in order to meet practical requirements.
    • 提供了一种用于调节复合纳米吸收剂的结构和性能的方法。 该方法采用纳米多氯甲基化聚苯乙烯 - 二乙烯基苯珠作支撑材料,采用原位沉淀法在其上负载解离功能纳米粒子; 可以通过调节孔结构来制备不同吸收容量和吸收速度的复合纳米吸收剂,这通过在溶胀剂和催化剂存在下加热氯甲基化珠来开始交联反应而实现; 通过改变反应体系中不同组分的比例,加热方式和反应时间,可制备不同孔结构的聚合物载体。 本发明可以成功调节无机纳米颗粒的分布和尺寸; 由不同交联度的树脂制备的复合纳米材料具有不同的结构和性能,可以选择具体的结构和性能,以满足实际需要。