Abstract: Methods, systems, and devices for protecting a wireless power transfer system. One aspect features a sensor network for a wireless power transfer system. The sensor network includes a differential voltage sensing circuit and a current sensing circuit. The differential voltage sensing circuit is arranged within a wireless power transfer system to measure a rate of change of a voltage difference between portions of an impedance matching network and generate a first signal representing the rate of change of the voltage difference. The current sensing circuit is coupled to the differential voltage sensing circuit and configured to calculate, based on the first signal, a current through a resonator coil coupled to the wireless power transfer system.

Abstract: A relay with an intermediate alert mechanism and a method for producing an intermediate alert in association with a relay. The relay comprises an input sampling module configured to detect a parameter of a source to be monitored; a processing module configured to determine a working range based on a threshold level and a working condition, and the processing module further configured to automatically determine at least one intermediate level within the working range based on the threshold level. The processing module causes the transmission of an intermediate trigger signal when the detected value of the parameter reaches the intermediate level.

Abstract: A method for suppressing voltage overshoot at an output of a voltage regulator is disclosed. The voltage regulator includes at least one channel having a first set of (high-side) transistors and a second set of (low-side) transistors. In implementations of the method, an output voltage at an output of at least one channel of a voltage regulator is detected and compared with a reference voltage. A rate of change associated with the output voltage is also determined and compared with a threshold rate of change. When the output voltage is greater than the reference voltage and the rate of change is greater than the threshold rate of change, a resistance value associated with the second set of transistors is increased from a first resistance value to a second resistance value to prevent the output voltage from overshooting and/or to suppress an output voltage overshoot.

Abstract: A pre-bias control circuit for a switching power converter detects the slope of the output voltage over time and outputs an OPEN command when the slope detected is more NEGATIVE than a pre-defined threshold and a pre-charge current that flows back through the switching power converter has reached a maximum value. In response, the synchronous rectifier switch OPENs overriding the typical control waveform to control the energy from the output voltage from flowing back through the switching power converter. The switching power converter may be any converter that includes a synchronous rectifier, such as a flyback converter, a forward converter, a buck converter, in a single-ended, double-ended and/or multi-phased configuration.

Abstract: A method for buffering the voltage of an electric system that undergoes transient voltage changes includes the step of placing a new load upon the electric system by electrically connecting at least one electrochemical device to the electric system so that electrical current flows from the electric system to the electrochemical device. Also included are the steps of causing at least one electrochemical reaction to occur within the at least one electrochemical device; varying the new load placed upon the electric system as transient voltage changes in the electric system occur; and changing the electrical current from the electric system to the electrochemical device in a manner that retards transient voltage changes in the electric system that would occur in the absence of the steps of placing, causing, and varying.

Abstract: Systems, devices, and related methods for automated testing of an automatic transfer switch. A device for testing an automatic transfer switch includes a primary power supply input, a controlled primary power output, a primary power source selection assembly, an output electrical power monitor unit, and a control input. The power source selection assembly is controllable to enable selective communication of electrical power received via the primary power supply input to the controlled primary power output. The output electrical power monitor unit is configured to monitor electrical power supplied to a connected load via the automatic transfer switch. The control input is operatively coupled with the primary power source selection assembly and the output electrical power monitor unit to enable control of the operation of the primary power source selection assembly via an external controller and to transfer output from the output electrical power monitor unit to the external controller.

Abstract: An electric power system for a wind turbine includes at least one auxiliary load bus configured to transmit electric power to auxiliary equipment. The auxiliary load bus is further configured to receive electric power having a voltage within a first predetermined tolerance range. The system also includes at least one motor-generator set coupled to the auxiliary load bus. The motor-generator set is configured to receive electric power having a voltage within a second predetermined tolerance range and transmit electric power to the auxiliary load bus in the first predetermined tolerance range.

Abstract: In one example embodiment, a power control system includes one or more stages, a plurality of primary busbars operatively coupled to the one or more stages, and an intelligent controller operatively coupled to the one or more stages. Each of the one or more stages is configured to generate a lead current when coupled in parallel to a power distribution system, and at least one of the one or more stages comprises a notch filter and a power tank circuit. Each of the plurality of primary busbars is configured to carry one phase of a multiple phase power signal. The controller is configured to determine when to switch each of the one or more stages one and off, to count a number of times each stage is switched on, and to track one or more electrical parameters of the power distribution system, power control system, or both.

Abstract: A method for monitoring subsystem power includes, with a power control system of an electronic device, receiving energy usage data from one of a plurality of subsystems within the electronic device, with the power control system, maintaining energy usage data for the plurality of subsystems within the electronic device, and with the power control system, providing integrated energy usage data to one of the plurality of subsystems.

Abstract: Techniques described herein generally relate to optimizing energy consumption in a computer system. In some examples an energy usage benchmark can be determined for a system component of the computer system by measuring performance levels and energy usages of the system component under a range of energy settings and utilization rates of the system component. A utilization rate of the system component can be determined based on prediction factors including the execution of a first set of instructions on the computer system. The system component can be configured to execute a second set of instructions after the first set of instructions by selecting an energy setting from the range of energy settings for operating the system component. The energy setting can be selected based on the energy usage benchmark and the determined utilization rate.

Abstract: A battery charging circuit comprising: a semiconductor switch having an output connected to a rechargeable battery; a battery charge controller for receiving power from an external source, and supplying output power to a portable device and the input of the semiconductor switch, the current output of the battery charge controller being controllable; and a voltage sensing circuit for: measuring the voltage drop across the battery charge controller; and responding to the voltage drop across the battery charge controller by modulating the semiconductor switch to reduce the quantity of current supplied to the rechargeable battery when the voltage drop is too great; whereby the total power dissipated by the battery charge controller is controlled, the portable device receiving the power it needs to operate and the rechargeable battery receiving any additional available power.

Abstract: In one embodiment, a signal detector is coupled to an external power source. The signal detector is configured to ascertain whether a predetermined signal was received from the external power source. Control logic is coupled to the signal detector and to the external power source. The control logic is responsive to the signal detector to determine a characteristic of the external power source based on whether the signal detector detected the predetermined signal. The characteristics of the external power supply can be determined based on the frequency, amplitude and duration of a signal received from the power injector. This enables the control logic to determine the power available from an unknown power supply and to configure a device to operate accordingly.

Abstract: A device is disclosed for generating a stable high voltage, namely a high-voltage DC generator for a particle beam apparatus. A method is also disclosed for generating a stable high voltage for a particle beam apparatus. The high-voltage DC generator has a controllable voltage source, which is connected to an amplifier. The high-voltage DC generator ensures that fluctuations of the smoothed high voltage are detected by a capacitive divider and supplied to the amplifier. The amplifier controls the controllable voltage source in counterphase. The voltage of the controllable voltage source is superimposed on the smoothed high voltage. The sum of the voltage of the controllable voltage source and the smoothed high voltage forms the generated and stable high voltage, which is supplied to a particle beam apparatus.

Abstract: A transient recovery circuit for switching devices. The transient recovery circuit includes a detecting circuit for detecting a rapid transient in an output voltage of a switching device by detecting a rate of the output voltage transient; an auxiliary controlling circuit in a feedback loop of the switching device for correcting the output voltage by changing a bandwidth of the feedback loop if the rapid transient is detected; and an initializing circuit for initializing the feedback loop to expected operating points in a continuous conduction mode after correcting the output voltage.

Abstract: Disclosed is a method and apparatus for charging electrically powered devices. In accordance with the invention, the device is powered by two storage or charge receiving devices. One of these devices is capable of receiving a substantial charge very rapidly while the other device requires a longer time to receive a charge. The advantage is that the powered device can be used almost instantly and continually while at the same time rebuilding electrical charge. The present invention further relates to a system for protecting the charging device from being damaged from an electrical surge, such as from a lightening strike.

Abstract: A battery charging circuit comprising: a semiconductor switch having an output connected to a rechargeable battery; a battery charge controller for receiving power from an external source, and supplying output power to a portable device and the input of the semiconductor switch, the current output of the battery charge controller being controllable; and a voltage sensing circuit for: measuring the voltage drop across the battery charge controller; and responding to the voltage drop across the battery charge controller by modulating the semiconductor switch to reduce the quantity of current supplied to the rechargeable battery when the voltage drop is too great; whereby the total power dissipated by the battery charge controller is controlled, the portable device receiving the power it needs to operate and the rechargeable battery receiving any additional available power.

Abstract: A supply topology comprising an AC to DC or DC to DC adapter and an electronic device with an active system, a battery, and an adapter controller implements closed-loop control of adapter output voltage to limit power consumption by the electronic device to a value related to maximum adapter power. The adapter adjusts its output voltage in response to the magnitude of an error signal representing an amount by which instantaneous power consumption exceeds adapter maximum power. An adapter controller in the electronic device sets a limit for allocating current to battery charging from the signal representing maximum adapter power, with battery charging current approaching zero as instantaneous power consumption approaches maximum adapter power.

Abstract: A weighing machine having a weighing platform includes a detection unit for outputting a detection voltage depending on a load acting on the measuring platform; a first data generation unit for A-D converting the detection voltage to generate first data; a second data generation unit for A-D converting the detection voltage to generate second data; and a control unit which stops operating the second data generation unit and monitors the first data in a standby state, switches from the standby state to a measurement state when the control unit senses that an object is placed on the weighing platform, then stops operating the first data generation unit and operates the second data generation unit, and outputs the measured weight of the object according to the second data. The first data generation unit consumes less power but has a lower A-D conversion precision than the second data generation unit.

Abstract: A battery charging circuit comprising: a semiconductor switch having an output connected to a rechargeable battery; a battery charge controller for receiving power from an external source, and supplying output power to a portable device and the input of the semiconductor switch, the current output of the battery charge controller being controllable; and a voltage sensing circuit for: measuring the voltage drop across the battery charge controller; and responding to the voltage drop across the battery charge controller by modulating the semiconductor switch to reduce the quantity of current supplied to the rechargeable battery when the voltage drop is too great; whereby the total power dissipated by the battery charge controller is controlled, the portable device receiving the power it needs to operate and the rechargeable battery receiving any additional available power.

Abstract: Disclosed is a method and apparatus for charging electrically powered devices. In accordance with the invention, the device is powered by two storage devices. One storage device is capable of receiving a substantial charge very rapidly while the other storage device requires a longer time to receive a charge. The advantage is that the powered device can be used almost instantly and continually while at the same time rebuilding electrical charge.

Abstract: A medical apparatus includes a substrate member and an applicator member. Substrate member includes a medical device and an adhesive layer for adhering to body tissue. Applicator member is releasably attached to the substrate member and is adapted for grasping by a clinician to facilitate application of the substrate member to body tissue.

Abstract: A battery charging circuit comprising: a semiconductor switch having an output connected to a rechargeable battery; a battery charge controller for receiving power from an external source, and supplying output power to a portable device and the input of the semiconductor switch, the current output of the battery charge controller being controllable; and a voltage sensing circuit for: measuring the voltage drop across the battery charge controller; and responding to the voltage drop across the battery charge controller by modulating the semiconductor switch to reduce the quantity of current supplied to the rechargeable battery when the voltage drop is too great; whereby the total power dissipated by the battery charge controller is controlled, the portable device receiving the power it needs to operate and the rechargeable battery receiving any additional available power.

Abstract: A battery charging circuit comprising: a semiconductor switch having an output connected to a rechargeable battery; a battery charge controller for receiving power from an external source, and supplying output power to a portable device and the input of the semiconductor switch, the current output of the battery charge controller being controllable; and a voltage sensing circuit for: measuring the voltage drop across the battery charge controller; and responding to the voltage drop across the battery charge controller by modulating the semiconductor switch to reduce the quantity of current supplied to the rechargeable battery when the voltage drop is too great; whereby the total power dissipated by the battery charge controller is controlled, the portable device receiving the power it needs to operate and the rechargeable battery receiving any additional available power.

Abstract: A supply topology comprising an AC to DC or DC to DC adapter and an electronic device with an active system, a battery, and an adapter controller implements closed-loop control of adapter output voltage to limit power consumption by the electronic device to a value related to maximum adapter power. The adapter couples a signal representing maximum adapter power to a control line connected to the electronic device and the electronic device couples an error signal representing the difference between instantaneous power consumption and adapter maximum power onto the same control line. The adapter adjusts its output voltage in response to the magnitude of the error signal. An adapter controller in the electronic device sets a limit for allocating current to battery charging from the signal representing maximum adapter power, with battery charging current approaching zero as instantaneous power consumption approaches maximum adapter power.

Abstract: A semiconductor circuit according to an embodiment of the invention includes: a terminal resistor circuit including a first Pch transistor; and a control circuit for outputting a control signal to a gate terminal of the first Pch transistor to control a resistance value of the terminal resistor circuit, the control circuit including: a second Pch transistor having a resistance value that is changed in the same direction as a resistance value of the second first transistor with respect to a specific parameter; and a resistor having a resistance value that is less changed than the resistance value of the second transistor with respect to the specific parameter, wherein the control circuit outputting the control signal based on a voltage between the second Pch transistor and the resistor.

Abstract: A hydraulic fluid change indicating device for an automatic transmission includes a first deterioration rate calculating unit; a deterioration acceleration coefficient calculating unit; and a thermal hydraulic fluid deterioration calculating unit for calculating a thermal hydraulic fluid deterioration according to the first deterioration rate and the deterioration acceleration coefficient. The device further includes a second deterioration rate calculating unit according to an engine speed, input shaft speed, and output shaft speed; a mechanical hydraulic fluid deterioration calculating unit for calculating a mechanical fluid deterioration according to the second deterioration rate; and a determining unit for determining whether or not the thermal hydraulic fluid deterioration or the mechanical hydraulic fluid deterioration is greater than a predetermined hydraulic fluid change threshold.

Abstract: A dynamic temperature control method for a computer. The present invention monitors the power consumption and temperature of a microprocessor to set the rotation speed of a fan module at an appropriate speed such that noise generated and overheating are reduced.

Abstract: A connector that may indicate an edition of a connecting interface of a computer, includes a host controller, and an indicator electrically connected to the host controller. The host controller includes a judging device used to judge a transmitting velocity between the host of the computer and the peripheral device. Thus, the indicator may be adapted to indicate the edition of the connecting interface according to the transmitting velocity between the host of the computer and the peripheral device.

Abstract: Operating range of feedback in CVT ratio control has been extended by use of stabilized values as an actual value of CVT ratio. The actual value of CVT ratio is derived from first and second pulse train signals provided by input and output speed sensors. Updating of rotational speed of the input member is repeated at intervals governed by the first pulse train. Updating of rotational speed of the output member is repeated at intervals governed by the second pulse train. Updating of an old value of a ratio between the latest value of the rotational speed of the input member and the latest value of the rotational speed of the output member to a new value thereof is repeated each time immediately after the rotational speeds of the input and output members have been updated since the latest updating of an old value of the ratio.

Abstract: A transitioning of power dissipation in a processing device (11) is coordinated with the operation of a cooling system (16, 17, 18) for the processing device. A power transitioning arrangement (15) transitions power dissipation in the processing device (11) between a high power level and a relatively lower low power level. In conjunction with a transitioning of the processing device power level, the cooling system (16, 17, 18) is placed in either a high or low thermal impedance state to reduce the rate at which the temperature of the data processing device (11) and related elements change in response to the change in power dissipated by the processing device. Transitioning the power dissipation in the processing device (11) may be accomplished by gradually varying the clock rate for the device, by changing the clock rate to various processing elements in the device at different times, and/or by changing the instruction issue rate in the device.

Abstract: A communication apparatus is provided which permits system configuration to be freely changed even after electronic circuit boards are mounted to a shelf. The apparatus is a combination of an open rack and a shelf mounted on the rack, office cables for interconnecting external electronic devices are guided toward the rear of the apparatus and connected directly to external connectors of the electronic circuit boards, and a back wiring board is arranged on the rear surface of the shelf and has sheet connectors to which power supply connectors of the electronic circuit boards are connected.

Abstract: An active current injection device is used to generate and inject fundamental and non-fundamental frequency current components onto an AC power line. A current pump control circuit receives an input signal which is representative of the line voltage of the power line. In response, the current pump control circuit generates a control signal which is used to generate a current component at the fundamental frequency which lags the line voltage by approximately 90 degrees. This fundamental frequency current component is transmitted through an impedance to the power line, thereby causing a voltage drop at the fundamental frequency across the impedance which is within a selected range about the line voltage. In one embodiment, this selected range is equal to approximately 25 to approximately 150 percent of the line voltage. Also, a damping control circuit receives an input signal which is representative of the line voltage of the power line.

Abstract: A microprocessor (8) controlled power-saving electronic measuring system is disclosed. A load cell (1) generates an output signal indicative of the magnitude of the load applied to the cell (1). A DC power supply (2) is switched to supply the load cell (1) with power pulses (10) at varying frequencies and duty cycles determinable by the microprocessor (8) to optimize battery life. The microprocessor (8) determines the optimal duty cycle and frequency for the power pulses responsive to desired parameters. The circuitry of the present invention is located in close proximity to a temperature sensor (34) which accurately reads the temperatures of all of the components and compensates for all heat related inaccuracies simultaneously. The microprocessor (8) determines a temperature corrected value for the load cell (1) output via a previously programmed table containing the temperature response characteristics for the load cell (1) and the circuitry.

Abstract: An apparatus for detecting a power system disturbance. The apparatus may be a current rate-of-change relay for qualifying system-separation transfer-trip commands.

Abstract: It has been determined that if the level of the current input to a feedback stabilized driver amplifier circuit is compared with the level of the current output by the amplifier portion of this circuit, the ratio of the two currents is indicative of the condition of a load connected to the circuit. If the load comprises one or more impedances all of the same value, the ratio obtained will determine not only whether or not the load is open or short circuited but how many of the standard value loads are connected in parallel.

Abstract: A strip break detection system is disclosed for a process line in which strip material is being payed out from a payoff reel to a rewind reel. The system is digital, and is based on the concept that for normal mill operation, with continuous strip being payed out from a payoff reel to a rewind reel, equal increments of rotation of the rewind reel, results in ever increasing increments of rotation of the payoff reel. A payoff counter is coupled to the payoff reel. The break detection system is controlled from a rewind counter coupled to the rewind reel which triggers a sequence controller for comparing the successive counts in the payoff counter to ensure that they are ever increasing under normal processing conditions, if the comparison indicates the converse an alarm is sounded; however, since there may be transient and self correcting conditions in the process line during which the latter count of the payoff counter may be less, the system is desensitized by further comparison with a dead band count.

Abstract: Power transfer relay circuitry is disclosed for providing synchronous transfer of power such as from an auxiliary source or system to a motor or motor bus; the circuitry effects the transfer of power when the phase difference between the motor bus and the auxiliary power source is very nearly zero degrees.

Abstract: The electronic measuring system includes a novel power supply which converts D.C. from a D.C. source to voltage pulses to drive a transducer. During intervals between transducer power pulses, an automatic drift compensation system stores an indication of system drift for use during a subsequent power pulse period. The system includes stability sensing means which render the system inoperative for measurement purposes when the signal from the measuring transducer is unstable. A plurality of sample measurement signals are taken and stored, and then passed through a programmable low pulse filter to accomplish a measurement. Thus each measurement is the result of a plurality of measurement cycles.

Abstract: Apparatus for indicating the concentration of a particular constituent in a fluid including a sensing device for sensing the concentration of a particular constituent in a fluid and for providing a response; and an electronic device including a differentiating circuit for differentiating an electrical input signal which is proportional to the sensing response for providing a substantially constant output signal which is a measure of the sensing response differentiated with respect to time, which output signal is an indication of the concentration of the constituent in the fluid. The sensing device is operated during a sampling period in which the reaction of such constituent to the sensing device is linear.

Abstract: The self-calibrating leak detector circuit arrangement comprises a measuring probe for generating an electrical signal when exposed to the leaking gas. A measuring amplifier is connected to the probe for amplifying the electrical signal and a second integrating amplifier stage is connected to the measuring amplifier output for amplifying the signal. The second amplifier stage has a feedback connection to the input of the measuring amplifier for counteracting at least a part of the electrical signal from the probe. A push button switch is advantageously connected between the measuring amplifier and the second amplifier stage to momentarily impress the output of the measuring amplifier on the input of the second integrating amplifier stage. Indicators are connected to the outputs of the respective amplifiers for a reading of their respective outputs.

Abstract: The electronic measuring system includes a novel power supply which may receive power from a D.C. or A.C. source but which is particularly adapted to convert D.C. battery power to higher voltage pulses to drive a transducer. During intervals between transducer power pulses, an automatic drift compensation system stores an indication of system drift for use during a subsequent power pulse period. The system includes stability sensing means which render the system inoperative for measurement purposes when the signal from the measuring transducer is unstable. To compensate for a loss of time, the system automatically operates for a short period at a rapid rate subsequent to a period of input signal unstability.A novel indicator system and indicator control unit is employed wherein up-down counters are controlled in the indicator for rounding purposes.