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公开(公告)号：US5847909A
公开(公告)日：1998-12-08
申请号：US838060
申请日：1997-04-17
IPC分类号： H02H3/16 , H02H11/00 , H05B41/285 , H02H7/04
CPC分类号： H02H11/002 , H02H3/162 , H05B41/2851 , H05B41/2853
摘要： A transformer control circuit which includes a ground fault detection circuit that detects ground fault currents in the transformer secondary and delivers a ground fault detection signal to the primary circuit. This circuit derives power from the secondary winding and transmits the ground fault detection signal through an optical isolation barrier, thus avoiding the use of an auxiliary transformer. The ground fault detection circuit further includes safety features for detecting whether AC power is being supplied without earth ground being connected, and/or whether there is an undesired electrical connection between a transformer output connection and earth ground, which would defeat the ground fault detection circuit.
摘要翻译： 一种变压器控制电路，其包括接地故障检测电路，其检测变压器次级中的接地故障电流并将接地故障检测信号传送到初级电路。 该电路从次级绕组获得电力，并通过光隔离屏障传输接地故障检测信号，从而避免使用辅助变压器。 接地故障检测电路还包括用于检测交流电源是否被提供而不接地的安全特征，和/或变压器输出连接和接地之间是否存在不需要的电连接，这将使接地故障检测电路 。
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公开(公告)号：US5914843A
公开(公告)日：1999-06-22
申请号：US984675
申请日：1997-12-03
IPC分类号： H05B41/285 , H02H3/00
CPC分类号： H05B41/2856 , H05B41/2851 , Y10S315/07
摘要： A power supply power supply circuit of the kind which includes a transformer having primary and secondary windings and an oscillator for driving the primary winding in a bi-directional fashion, suitable for driving gas discharge lighting such as neon signs, which prevents dangerous overvoltage output conditions and detects relatively low level ground fault currents. The transformer includes a clamp winding which is in proximity to and capacitively coupled to the secondary winding. The terminals of the clamp winding are connected to a current imbalance detection circuit for detecting imbalance between the current flowing into one clamp winding terminal and the current out of the other clamp winding terminal. In a ground fault condition, ground fault current flows in an unbalanced fashion into the clamp winding terminal(s), and through the capacitive coupling to the secondary winding. This ground fault current is detected by the current imbalance detection circuit, causing the current imbalance detection circuit to generate an electrical signal indicative of ground fault current, which shuts down the oscillator.
摘要翻译： 一种电源电源电路，其包括具有初级和次级绕组的变压器和用于以双向方式驱动初级绕组的振荡器，其适于驱动诸如霓虹灯的气体放电照明，其防止危险的过电压输出条件 并检测相对低电平的接地故障电流。 变压器包括钳位绕组，该钳位绕组接近并电容耦合到次级绕组。 夹紧绕组的端子连接到电流不平衡检测电路，用于检测流入一个钳位绕组端子的电流与另一个钳位绕组端子之间的电流之间的不平衡。 在接地故障条件下，接地故障电流以不均衡的方式流入钳位绕组端子，并通过与次级绕组的电容耦合。 该接地故障电流由电流不平衡检测电路检测，导致电流不平衡检测电路产生指示接地故障电流的电信号，从而关闭振荡器。
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公开(公告)号：US08466631B1
公开(公告)日：2013-06-18
申请号：US12785981
申请日：2010-05-24
IPC分类号： H05B37/02
CPC分类号： H05B33/0815 , H05B33/0845 , H05B41/39 , Y02B20/346
摘要： A circuit for dimming a lamp is provided. The circuit includes a triac dimmer that adjusts the voltage level of an input AC waveform based on the setting of a dimmer switch. The output of the dimmer is provided to a power supply circuit that drives the lamp based on the voltage level at the dimmer output. The power supply circuit includes a compensation circuit that compensates for loss of dimmer output signal caused by the triac when the dimmer switch is adjusted for full output. The compensation circuit is configured to engage at dimmer output voltage levels between full power supply voltage and a voltage threshold. The voltage threshold may be based on the dimmer output voltage level when the dimmer switch is set for full output. The compensation circuit essentially disengages to allow the lamp to dim when the dimmer output voltage level falls below the threshold.
摘要翻译： 提供了一种用于调光灯的电路。 该电路包括三端双向可控硅调光器，其基于调光开关的设置来调节输入AC波形的电压电平。 调光器的输出被提供给基于调光器输出端的电压电平来驱动灯的电源电路。 电源电路包括补偿电路，其补偿当调光开关调节为满量时由三端双向可控硅开关引起的调光输出信号的损失。 补偿电路被配置为在全电源电压和电压阈值之间参与调光输出电压电平。 当调光器开关设置为全输出时，电压阈值可以基于调光器输出电压电平。 当调光器输出电压电平低于阈值时，补偿电路基本上脱离以允许灯变暗。
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公开(公告)号：US06414465B1
公开(公告)日：2002-07-02
申请号：US09887309
申请日：2001-06-22
IPC分类号： H01M1046
CPC分类号： H01M10/48 , H01M2/20 , H01M10/342
摘要： A battery charger for a lead acid battery having a power supply with an input connected to an AC signal and an output connected to the battery. The power supply provides a charge current to the battery. A clock connected to the AC signal provides clock pulses having transitions synchronized with zero crossings of the AC signal. A voltage monitor connected to the battery detects a battery voltage substantially simultaneously with a zero value of the charge current. A charge mode control is connected to the clock and the voltage monitor for commanding different battery charge currents. The voltage monitor includes a temperature compensation circuit. The battery charger includes a display module that can be placed at a location remote from the battery charger and convenient to the user. The battery charger executes a battery charge cycle in which absorption and equalization charge times are variable and automatically set as a function of the state of discharge of the battery, that is, as a function of the bulk charge time. During an initial evaluation period, the battery is tested for a deep discharge condition, and if detected, a desulfation charge current is automatically applied for a time period, for example, two hours.
摘要翻译： 一种用于铅酸电池的电池充电器，其具有电源，其输入端连接到AC信号，并且输出端连接到电池。 电源为电池提供充电电流。 连接到AC信号的时钟提供具有与AC信号的过零点同步的转换的时钟脉冲。 连接到电池的电压监视器基本上与充电电流的零值同时检测电池电压。 充电模式控制连接到时钟和电压监视器，用于指示不同的电池充电电流。 电压监视器包括温度补偿电路。 电池充电器包括可以放置在远离电池充电器的位置并且对用户方便的显示模块。 电池充电器执行电池充电循环，其中吸收和均衡充电时间是可变的，并且根据电池的放电状态，即作为批量充电时间的函数自动设置。 在初始评估期间，对电池进行深度放电条件测试，如果检测到，则将自动施加脱硫充电电流一段时间，例如两小时。
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5.发明授权
公开(公告)号：US6040778A
公开(公告)日：2000-03-21
申请号：US63475
申请日：1998-04-20
IPC分类号： G01R31/02 , H05B41/285 , G08B21/00
CPC分类号： H05B41/2851 , G01R31/025
摘要： A power supply circuit detects ground fault paths, and miswiring of the load, using a test mode in which electrical power is applied to only one power output terminal of the power supply relative to the ground terminal, while substantially no electrical power is applied to the second power output terminal relative to the ground terminal. If application of power during the test mode causes substantial current flow through ground, then there is a ground fault path, or an incorrect connection between the midpoint of the load and ground. The power supply further includes unique features for signaling the presence and kind of fault it has detected; the power supply is capable of distinguishing between ground faults in at least two different locations, and when a fault is detected, the power supply signals the presence of the fault and its location, e.g., by timed blinking of the connected discharge light. These features are enhanced by a diagnostic analyzer for connection to the power supply. The diagnostic analyzer monitors power flow from the output terminals of the diagnostic analyzer to the input terminals of the power supply, and evaluates the power flow to identify power flow patterns indicative of a fault and the kind of fault. The power supply also reduces inrush current by disconnecting and reconnecting power to the transformer primary winding in opposite half-cycles of the alternating current electrical power.
摘要翻译： 电源电路使用对电源相对于接地端子的仅一个电力输出端子施加电力的测试模式来检测接地故障路径和负载接线，同时基本上没有电力施加到 第二功率输出端子相对于接地端子。 如果在测试模式下施加电源导致大量电流流经地面，则存在接地故障路径，或负载中点与地之间的不正确连接。 电源还包括用于发信号通知检测到的故障的存在和种类的独特功能; 电源能够区分至少两个不同位置的接地故障，并且当检测到故障时，电源例如通过连接的放电灯的定时闪烁来指示故障的存在及其位置。 这些功能由诊断分析仪增强，用于连接电源。 诊断分析仪监视从诊断分析仪的输出端子到电源输入端的功率流，并评估功率流，以识别指示故障和故障种类的功率流模式。 电源还通过在交流电力的相反的半个周期内断开和重新连接变压器初级绕组的电源来降低浪涌电流。
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6.发明授权Method and system for improving start-up time of a light emitting diode (LED) driver at reduced input voltage 有权用于在降低的输入电压下提高发光二极管（LED）驱动器的启动时间的方法和系统公开(公告)号：US08629631B1
公开(公告)日：2014-01-14
申请号：US13188043
申请日：2011-07-21
IPC分类号： G05F1/00
CPC分类号： H02M1/36 , H02M1/4208 , H02M3/33515 , H02M2001/0006 , Y02B70/126
摘要： Improving start-up time of a light emitting diode (led) driver at lower input voltage is accomplished with a quick start circuit comprising a constant current source that replaces the traditional trickle charge start-up path for charging of a Vcc capacitor supplying operating voltage to an SMPS controller. Also the constant current source will only be operational during SMPS start-up, then will turn off after the SMPS is capable of producing its own regulated power supply to the Vcc terminal of the SMPS controller, thereby minimizing E2/R power losses in the SMPS.
摘要翻译： 在较低输入电压下改善发光二极管（LED）驱动器的启动时间是通过一种快速启动电路实现的，该启动电路包括一个恒定电流源，该恒定电流源代替传统的涓流充电启动路径，用于向提供工作电压的Vcc电容器充电 一个SMPS控制器。 此外，恒流源只能在SMPS启动期间运行，然后在SMPS能够为SMPS控制器的Vcc端产生自己的稳压电源后关闭，从而将SMPS中的E2 / R功率损耗降至最低 。
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7.发明授权Reducing total harmonic distortion in a power factor corrected flyback switch mode power supply 有权在功率因数校正反激开关模式电源中降低总谐波失真公开(公告)号：US08471488B1
公开(公告)日：2013-06-25
申请号：US13036420
申请日：2011-02-28
IPC分类号： H05B41/16
CPC分类号： H02M1/4258 , Y02B70/126
摘要： Total harmonic distortion (THD) at the AC line input of a power factor corrected (PFC) flyback switch mode power supply (SMPS) is reduced by adding additional current injection to the current programming signal of a PFC controller during the period of the line cycle where the AC input current wave shape is most flattened, i.e., around the peak portion of the AC line voltage. The input current drawn by the PFC flyback SMPS will then more closely resemble a desired sinusoidal waveform. A voltage dependent non-linear resistance is coupled in parallel with the normal current injection resistor that supplies current to the PFC flyback controller multiplier input to inject appropriate values of additional current into the PFC flyback controller based upon the AC input voltage value(s) so as to better shape the AC input current to the desired sinusoidal waveform.
摘要翻译： 功率因数校正（PFC）反激式开关模式电源（SMPS）的AC线路输入端的总谐波失真（THD）通过在线路周期期间向PFC控制器的当前编程信号增加额外的电流注入来减少 其中AC输入电流波形最平坦化，即在AC线电压的峰值部分周围。 然后由PFC反激式SMPS绘制的输入电流将更接近于所需的正弦波形。 电压相关的非线性电阻与正常电流注入电阻并联耦合，该正常电流注入电阻器将电流提供给PFC反激控制器乘法器输入，以根据AC输入电压值将合适的额外电流值注入到PFC反激控制器中 以便更好地将交流输入电流形成所需的正弦波形。
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公开(公告)号：US06366208B1
公开(公告)日：2002-04-02
申请号：US09453426
申请日：1999-12-02
IPC分类号： G08B2100
CPC分类号： H05B41/2851 , G01R31/025
摘要： A power supply circuit detects ground fault paths, and miswiring of the load, using a test mode in which electrical power is applied to only one power output terminal of the power supply relative to the ground terminal, while substantially no electrical power is applied to the second power output terminal relative to the ground terminal. If application of power during the test mode causes substantial current flow through ground, then there is a ground fault path, or an incorrect connection between the midpoint of the load and ground. The power supply further includes unique features for signaling the presence and kind of fault it has detected; the power supply is capable of distinguishing between ground faults in at least two different locations, and when a fault is detected, the power supply signals the presence of the fault and its location, e.g., by timed blinking of the connected discharge light. These features are enhanced by a diagnostic analyzer for connection to the power supply. The diagnostic analyzer monitors power flow from the output terminals of the diagnostic analyzer to the input terminals of the power supply, and evaluates the power flow to identify power flow patterns indicative of a fault and the kind of fault. The power supply also reduces inrush current by disconnecting and reconnecting power to the transformer primary winding in opposite half-cycles of the alternating current electrical power.
摘要翻译： 电源电路使用对电源相对于接地端子的仅一个电力输出端子施加电力的测试模式来检测接地故障路径和负载接线，同时基本上没有电力施加到 第二功率输出端子相对于接地端子。 如果在测试模式下施加电源导致大量电流流经地面，则存在接地故障路径，或负载中点与地之间的不正确连接。 电源还包括用于发信号通知检测到的故障的存在和种类的独特功能; 电源能够区分至少两个不同位置的接地故障，并且当检测到故障时，电源例如通过连接的放电灯的定时闪烁来指示故障的存在及其位置。 这些功能由诊断分析仪增强，用于连接电源。 诊断分析仪监视从诊断分析仪的输出端子到电源输入端的功率流，并评估功率流，以识别指示故障和故障种类的功率流模式。 电源还通过在交流电力的相反的半个周期内断开和重新连接变压器初级绕组的电源来降低浪涌电流。
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