1356 results about "Voltage rating" patented technology

In a co-generated power supply system for performing dispersed power supply to a load, a wind turbine generator, a solar cell and a fuel cell whose rated voltages are made equal to a rated voltage of a storage battery are used as DC power sources. These DC power sources, a commercial AC power source and the load are connected to each other via a bi-directional electronic transformer. Thus, the co-generated power supply system, in which the electric power of a natural energy system having many fluctuation factors is combined with stable electric power such as a load leveling battery or a fuel cell, allows the stable electric power to be supplied to the load via the electronic transformer commonly, thereby reducing the cost and enhancing the performance of the entire system.

A surface mount fuse includes a plurality of substrate/arc suppressive layers, a plurality of fusible elements positioned between the substrate/arc suppressive layers and terminations connected to the ends of the fusible elements, such that the fusible elements are electrically connected in parallel. The surface mount fuse has greater amperage and voltage ratings than similarly sized conventional surface mount fuses. Additionally, the surface mount fuse has increased interrupt breaking capacity and superior mechanical properties.

In an insulation type AC-dc converter in which input current from a commercial power supply is converted to obtain insulated direct current, the overall efficiency is raised and the structure is simplified. A multi-resonance type half-bridge DC-DC converter having an insulation transformer T is used as a first converter, and a boosting chopper circuit for power factor improvement is used as a second converter. Hence through multi-resonance operation, increases in losses can be suppressed even when the switching frequency is raised, and because a half-bridge circuit is used, switching elements and similar with lower voltage ratings can be employed, whereby overall efficiency can be increased. Moreover, a voltage substantially similar to the full-wave rectified waveform of the power supply voltage is obtained from the output capacitor at the boosting chopper circuit input, whereby there is no need for a feed-forward circuit across the insulation transformer, and moreover the electrolytic capacitor which had to be provided on the converter input side is unnecessary. This is advantageous for achieving miniaturization and a thin design.

Provided is a wirelessly charged robot cleaning system and a method for wirelessly charging a robot cleaner. The wirelessly charged robot may include a target resonator to receive a resonance power through energy-coupling with a source resonator of a wireless power transmitter, a wireless power receiving unit to convert the received resonance power into a rated voltage, and a battery controller to check the remaining capacity of the battery based and to charge the battery.

A step down voltage regulator including devices designed to operate over a maximum rated voltage lower than the supply voltage. The regulator comprises an output regulation device coupled to the supply voltage and an output; and an output device protection circuit responsive to the supply voltage and the output to ensure that the maximum rated voltage of the output device is not exceeded. Also provided is a method for operating a voltage regulator in a memory system. The method includes the steps of: providing a voltage regulator having an input and an output, and including a plurality of devices operating at a maximum rated voltage less than the voltage provided at the input; and controlling the gate voltage of the output device responsive to a load on the regulator output, so that the maximum rated voltage is not exceeded.

An integrated circuit package includes at least one one-time programmable element, such as a fuse, having a first and a second end separated by a programmable link. The first end of the one-time programmable element is coupled to a power supply voltage node in the package. The second end of the programmable element may be coupled to an external package connection (e.g., a package pin) and/or to an internal package node that connects to an input terminal of the integrated circuit die when the integrated circuit die is mounted in the package. The information programmed by the fuses may relate to speed or voltage ratings for a microprocessor.

Certain embodiments of the present invention provide a battery heating circuit, comprising a switch unit (1), a switching control module (100), a damping component R1, an energy storage circuit, and an energy superposition unit, the energy storage circuit is configured to connect with the battery to form a loop, and comprises a current storage component L1 and a charge storage component C1; the damping component R1, the switch unit (1), the current storage component L1, and the charge storage component C1 are connected in series; the switching control module (100) is connected with the switch unit (1), and is configured to control ON/OFF of the switch unit (1), so as to control the energy flowing between the battery and the energy storage circuit; the energy superposition unit is connected with the energy storage circuit, and is configured to superpose the energy in the energy storage circuit with the energy in the battery when the switch unit (1) switches on and then switches off; the switching control module (100) is also configured to control the switch unit (1) to switch off after the first positive half cycle of current flow through the switch unit (1) after the switch unit (1) switches on, and the voltage applied to the switch unit (1) at the time the switch unit (1) switches off is lower than the voltage rating of the switch unit (1).

The invention discloses an automobile emergency start power source which comprises a 12 V/24 V voltage output module. The 12 V/24 V voltage output module comprises a first set of cells, a second set of cells, a voltage switching unit and two output ports. The nominal voltage of the first set of cells and the nominal voltage of the second set of cells are both 12 V, and after the first set of cells and the second set of cells are connected in series, the two ends are connected with the two output ports respectively; the voltage switching unit is connected with the first set of cells and the second set of cells and used for controlling the first set of cells and the second set of cells to output 12 V voltage or 24 V voltage through the output ports. Compared with the prior art, due to the fact that the automobile emergency start power source is provided with the two sets of cells, the voltage switching unit and the two output ports, one set of output ports selectively output 12 V voltage or 24 V voltage, and the number of output ports needed by the automobile emergency start power source is reduced.

The invention discloses a photovoltaic microgrid power equalization control method based on three-end cooperative control, and the method comprises the steps: A) judging the current operation mode of a photovoltaic microgrid according to a DC bus voltage value of hte photovoltaic microgrid, a DC bus rated voltage value, an energy storage unit SOC, a photovoltaic power supply output power, and AC load power; B) carrying out the cooperative control of the working conditions of a photovoltaic power supply, an energy storage device and a grid-connected inverter in the photovoltaic microgrid according to the current operation model of the photovoltaic microgrid; C) controlling the current operation mode of the photovoltaic microgrid to be switched to an adjacent operation mode when the corresponding operation conditions are met; D) and enabling the converted operation mode to be updated to the current operation mode of the photovoltaic microgrid; and then switching to the step B). The method can enable the photovoltaic microgrid to be quickly switched to the corresponding operation mode in a seamless manner, thereby quickly eliminating the operation deviation, balancing the flow of an internal energy of the microgrid, reducing impact on the operation of the microgrid from power fluctuation, maintaining the stability of the voltage of a DC bus of the microgrid, and achieving the dynamic balance of the internal power of the microgrid.

The invention discloses a method for manufacturing a solid aluminum electrolytic capacitor. The manufacturing method comprises the step of impregnating a core by a monomer and an oxidant respectively after restoration and carbonizing treatment of the coiled core. The method is characterized in that the impregnated core is subjected to two-stage polymerization, namely, firstly low-temperature polymerization and then high-temperature polymerization, so that the polymerization of the monomer and the oxidant fully generates a stable conductive polymer layer; a solvent can be discharged out of the capacitor more efficiently so as to improve the electrical property of the capacitor; and voltages of 0.5, 1 and 1.2 times of a rated voltage are applied to a product in an ageing treatment process respectively to carry out stepwise ageing treatment so as to avoid damage of the core caused by overvoltage shock during disposable ageing, reduce ESR and leakage current LC and achieve the aim of improving the electrical property.

This invention relates to an efficient laminated graphite discharge arc gap device including: N+1 arc gaps and a pi-shaped connection capacitor set with N capacitors in the same capacitance value, in which, the gaps are serial to each other, the first one is connected with the live wire, the last one is connected to the earth, one end of each capacitor in the set is connected with the conduction piece between the two arc gaps and the other end is connected to the earth, the arc gap is made of graphite, insulation ring pad is set between the graphite electrodes, the arc gaps are assembled in lamination, parameter of each capacitor in the set is selected according to C=In/2pifVK, in which, In is the induced discharge current on the capacitors, In=I/N, I is the total current of the set, N is the number of capacitors, f is a lightning wave frequency, V is a rating voltage and K is a safety factor greater than or equal to 1.

A modular design for combining piezoelectric transformers is provided for high voltage and high power conversion applications. The input portions of individual piezoelectric transformers are driven for a single power supply. This created the vibration and the conversion of electrical to electrical energy from the input to the output of the transformers. The output portions of the single piezoelectric transformers are combining in series and/or parallel to provide multiple outputs having different rating of voltage and current,

The invention discloses a motor parameter detection method and a motor parameter detection device. The motor parameter detection method comprises the following steps: opening the circuit of one of phase windings of a motor; detecting stator leakage inductance and rotor leakage inductance; applying rated voltage with higher frequency than rated power between the other two phases of the motor; and detecting the stator leakage inductance and the rotor leakage inductance according to the computational formula of the stator leakage inductance and the rotor leakage inductance. The invention provides the off-line motor parameter detection method and the motor parameter detection device under the static condition of the rotor of an induction motor, which achieve high accuracy of motor parameter detection through reducing the influences of voltage errors and a skin effect as long as current or voltage with different frequencies is applied between the two phases of the motor in sequence.

An electric system of an aircraft includes a power stabilizing device connected to a primary AC bus and a secondary battery. The secondary battery has a rated voltage which allows the secondary battery to absorb regenerative power from a control surface actuator. Based on a voltage and a frequency in the primary AC bus, charging/discharging of the secondary battery is controlled to stabilize the electric system.

Embodiments disclosed herein provide methods and systems for auto-voltage detect chargers. One disclosed method comprises the steps of determining a condition of a battery based at least in part on a measured response to a predetermined test charge; and determining a voltage rating of the battery based at least in part on the condition of the battery and a response to a precharge process.

The invention discloses a power distribution network double-layer coordination planning method with distributed generation (DG) based on time sequence characteristic analysis, wherein the method relates to the field of power distribution network planning. The method is characterized by comprising the following steps of analyzing the time sequence characteristic; determining a planning content; establishing a double-layer coordination planning model; determining annual investment and operation maintenance cost of DG in a lower-layer DG configuration, annual reduction loss caused by grid connection, annual power generation amount maximal node voltage and desired value of rated voltage deviation amount; determining the annual investment and operation maintenance cost of the system, the annual active network loss cost of the system, the annual electric power purchasing cost of the power distribution network, annual fault power failure loss cost, system node voltage and the anticipated value of the rated voltage deviation amount; and planning the power distribution network with DG under the restriction. According to the method of the invention, the corresponding time sequence characteristic is analyzed, and influence between the DG and a power distribution network frame is considered, and a vertical double-layer multi-target coordination planning model is constructed for realizing purposes of optimizing an integral comprehensive decision and optimizing DG grid connection benefit.

An overvoltage protection circuit for use with a power supply is proposed, wherein the power supply includes a voltage supply circuit and a diode having a first electrode and a second electrode. The overvoltage protection circuit is used to stop or reduce the output voltage of the voltage supply circuit when the output voltage of the voltage supply circuit exceeds its maximum output voltage rating. The overvoltage protection circuit comprises a first comparator for detecting a first voltage at the first electrode of the diode and outputting a first detecting signal in response to the comparison between the first voltage and the maximum output voltage rating, a second comparator for detecting a second voltage at the second electrode of the diode and outputting a second detecting signal in response to the comparison between the second voltage and the maximum output voltage rating, and a logic circuit for stopping or reducing the output voltage of the voltage supply circuit when both of the first voltage and the second voltage are higher than the maximum output voltage rating.