37results about How to "Large voltage drop" patented technology

Effective scheduling of battery charge and discharge activities, by making the most of battery characteristics, can extend the battery pack's operation-time and lifetime. A system and method for scheduling battery activities is disclosed. This framework dynamically adapts battery activities to load demands and to the condition of individual battery cells, thereby extending the battery pack's operation-time and making them robust to anomalous voltage imbalances. The scheduling framework includes two components. An adaptive filter estimates the upcoming load demand. Based on the estimated load demand, a scheduler can determine the number of parallel-connected battery cells to be discharged. The scheduler also effectively partitions the battery cells in a pack, allowing the battery cells to be simultaneously charged and discharged in coordination with a reconfigurable battery circuit.

A light-emitting display capable of maintaining low power consumption and improving display quality irrespective of the configuration of an auxiliary wiring is provided. A second electrode 20 and an auxiliary wiring 18B are electrically connected to each other through a conductive contact section 15B. Moreover, only a part of the auxiliary wiring 18B is connected to the contact section 15B. Even if the surface of the auxiliary wiring 18B is oxidized, an increase in connection resistance is prevented. Moreover, a restriction on layout is not imposed at the time of forming the contact section 15B.

A circuit is disclosed for determining which of a multiplicity of LED strings in an illumination system has a fault. A group of circuits determines the maximum, minimum, midpoint between maximum and minimum, and average voltage of the group of LED string voltages in use, and examines the statistical properties of the LED string voltages. Comparators are used to find the strings which have the highest and lowest operating voltages, and to compare the midpoint and average voltages to determine whether the highest or lowest voltage string is responsible for causing a fault in the illumination system operation. Memory means are used to keep the said determined string turned off to prevent faulty operation.

A radio communication terminal has a plurality of matching circuits that optimize the efficiency of a power amplifier for a range of different battery voltages. A first matching circuit optimizes the efficiency of the power amplifier for a battery voltage higher than a predetermined threshold value. A second matching circuit optimizes the efficiency of the power amplifier at a voltage lower than the threshold value. A control section compares a detection result of a battery voltage from a voltage monitor section with the threshold value, and performs switching between the plurality of matching circuits.

The present invention relates to a load control system in which a power cable of a DC or AC is used for on/off control and dimming of connected load devices without adding significant hardware structure. The control is achieved through a change in the DC or AC bus voltage. A grid controller can perform on/off control and dimming for an entire group of connected load devices by changing the bus voltage. Connected load devices that do understand or want to make use of this feature will be unaffected. In order to reduce the effects of voltage drop, a calibration procedure is provided. The calibration procedure first triggers the connected load devices into a calibration mode and then initiates a number of predefined output level commands that allow the load devices to build an individual correction for the undesired voltage drop.

A single trigger/shunt coil is utilized for combined induced magnetic field triggering and shunt impedance. The single coil connected in parallel with the high temperature superconducting element, is designed to generate a circulating current in the parallel circuit during normal operation to aid triggering the high temperature superconducting element to quench in the event of a fault. The circulating current is generated by an induced voltage in the coil, when the system current flows through the high temperature superconducting element.

An electromagnetic solenoid that controls a motor current of a starter includes: a first switch including a pair of first fixed contacts and a first movable contact, intermitting the motor current; a suppression resistor that suppresses the motor current; a second switch including a pair of second fixed contacts and a second movable contact, making a short circuit path to bypass the suppression resistor; a regulation member being driven by a sub solenoid, regulating the second switch being closed and releasing the second switch from being regulated after predetermined time elapses when a plunger is pulled by a main electromagnet. The regulation member is disposed between a regulated position and a released position to regulate the second switch.

A compensation circuit is disclosed for compensating bias levels of an operational circuit in response to variations in a supply voltage. The compensation mechanism identifies variations in the supply voltage by comparing the voltage of a selected node of the operation circuit with a relatively constant or fixed reference voltage. Based on the results of the comparison, the compensation mechanism adjusts selected bias levels in the operational circuit, preferably using current stealing circuitry, so that the functionality and performance of the operational circuit can be substantially maintained. A biasing circuit for biasing one or more differential pairs is also disclosed.

A system and method for limiting engine starting current of a starter motor of an engine is described. In one example, starter motor current is controlled according to vehicle speed. The method may allow vehicle system voltage to remain at a higher level during automatically initiated engine starts.

A substrate for a semiconductor device includes: a base substrate; a semiconductor layer that has a source region, a drain region, a plurality of channel regions, and at least one intermediate region; a source electrode being in contact with the source region; a drain electrode being in contact with the drain region; a gate electrode that overlaps the plurality of channel regions, the intermediate region, and each of a part of the source electrode and a part of the drain electrode; and a floating electrode being in contact with the intermediate region. The size of an area where the floating electrode and the gate electrode overlap each other is smaller than the sum of the size of an area where the source electrode and the gate electrode overlap each other and the size of an area where the drain electrode and the gate electrode overlap each other.

The invention provides a fault direction judgment method suitable for a wind power access system and belongs to the technical field of power transmission line protection of the wind power access system. The technical problem is that the invention provides a non-earth-fault direction judgment method which is suitable for the wind power access system, and can effectively prevent direction misjudgement caused when a direction element is applied to the wind power side of a link line of the wind power access system. The technical scheme is characterized in that the method comprises the following steps: to begin with, collecting current and voltage at the protection installation place of the wind power side of the link line of the wind power access system; after obtaining the sampling value of a voltage fault component, obtaining positive-sequence component discrete values of the current, voltage and fault voltage; and finally, carrying out judgment on the fault according to the numerical values. The fault direction judgment method is suitable for an electric system.

A circuit includes a first semiconductor device and a second semiconductor device. The first semiconductor device has a first source region, a first gate region, and a first drain region. The first gate region and the first drain region are separated by a first distance. The second semiconductor device has a second source region, a second gate region, and a second drain region. The second gate region and the second drain region separated by a second distance. The first distance is greater than the second distance.

A pluggable module connected to the backplane or other connection interface of an information system unit so as to provide additional functionality thereto (such as a communications interface to an electrical or fiber optics cable), and arranged to draw electrical power from the system. In order to prevent excessive in-rush current on connection, the module is provided with power control circuitry which is adapted to incrementally increase the supply voltage to components within the module in a manner so as to avoid power supply glitches in the system, such as a substantial voltage drop, and/or excessive current flow.

A guided wave radar level gauge comprising a housing providing explosion proof protection and having an intrinsically safe output, a transmission line probe connected to the IS output. The housing encloses radar level gauge circuitry which is incompatible with intrinsic safety requirements, a microwave unit connected to the IS output, an electrical barrier connected between the RLG circuitry and the microwave unit, the electrical barrier having a barrier ground potential which is independent from the grounded housing wall, and a set of blocking capacitors connected between the microwave unit and the IS output.