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    • 2. 发明申请
    • Downhole cooling system
    • 井下冷却系统
    • US20060086506A1
    • 2006-04-27
    • US10973133
    • 2004-10-26
    • Christopher GollaJames MasinoRoger Schultz
    • Christopher GollaJames MasinoRoger Schultz
    • E21B43/24
    • E21B47/011
    • Apparatus and methods for operating an electronics assembly of a downhole tool. A method comprises disposing a temperature-sensitive electronic component within an insulated chamber contained within a downhole tool. The temperature of the temperature-sensitive electronic component is monitored and a temperature control system is selectively activated to regulate the temperature of the temperature-sensitive electronic component. A downhole electronic assembly comprises a temperature-sensitive electronic component and a temperature-tolerant electronic component in electrical communication with the temperature-sensitive electronic component. An insulating chamber provides a thermal barrier between the temperature-sensitive electronic component and the temperature-tolerant electronic component. A temperature control apparatus in thermal communication with the temperature-sensitive component.
    • 用于操作井下工具的电子组件的装置和方法。 一种方法包括将温度敏感的电子部件设置在包含在井下工具内的绝热室内。 监测温度敏感的电子元件的温度,选择性地激活温度控制系统以调节温度敏感的电子部件的温度。 井下电子组件包括温度敏感电子部件和与温度敏感电子部件电连通的耐温电子部件。 绝缘室在温度敏感的电子部件和耐温电子部件之间提供热障碍。 与温度敏感部件热连通的温度控制装置。
    • 8. 发明申请
    • Synchronous multi-phase AC-TO-DC converter
    • 同步多相交流 - 直流转换器
    • US20060077602A1
    • 2006-04-13
    • US10962849
    • 2004-10-12
    • James MasinoRoger Schultz
    • James MasinoRoger Schultz
    • H02H3/42
    • H02J1/10
    • Disclosed herein are various embodiments of power conversion systems and methods employing synchronous multi-phase AC-to-DC conversion. In one embodiment, a power converter comprises a transistor bridge and a switching controller that operates the transistor bridge in response to AC voltage threshold crossings. The switching controller may include a period counter to measure times between threshold crossings, and a delay counter to trigger a delayed state transition for the transistor bridge. One disclosed method embodiment comprises: receiving multiple phased alternating voltages; comparing each phased alternating voltage to a threshold; determining a period associated with voltage threshold crossings; triggering state transitions at some fraction of the period after each threshold crossing; and placing a transistor bridge into a configuration associated with a current state. For each state, the transistor bridge configuration is designed to couple phased alternating voltages to two output terminals in a sequence that produces a non-alternating voltage difference.
    • 这里公开了使用同步多相AC-DC转换的功率转换系统和方法的各种实施例。 在一个实施例中,功率转换器包括晶体管桥接器和开关控制器,其响应于AC电压阈值交叉而操作晶体管桥接器。 切换控制器可以包括用于测量阈值交叉之间的时间的周期计数器和用于触发晶体管桥的延迟状态转换的延迟计数器。 一种公开的方法实施例包括:接收多个相控交流电压; 将每个相控交流电压与阈值进行比较; 确定与电压阈值交叉相关联的周期; 在每个阈值交叉后的一段时间内触发状态转换; 并将晶体管桥放置在与当前状态相关联的配置中。 对于每个状态,晶体管桥结构被设计成以产生非交流电压差的顺序将相控交流电耦合到两个输出端。