73 results about "Leakage energy" patented technology

An inductor in a series path of a DC converter having a buck or boost configuration is constituted by a transformer with windings in series with switches of the converter. A transformer turns ratio facilitates matching switch voltage and current stresses to characteristics of MOSFETs forming the switches. A high side MOSFET can have its source at a constant voltage to facilitate driving this switch. One switch can be replaced by a diode. A transformer leakage energy removal circuit can provide an auxiliary output voltage, greater than the input voltage for a buck configuration.

A method and apparatus for recovering leakage energy during DC power to AC power conversion. The apparatus comprises a leakage energy recovery circuit for storing leakage energy from a transformer and selectively coupling stored leakage energy to an input of the transformer.

There is provided a system and methods for segmenting datapath resources such as reorder buffers, physical registers, instruction queues and load-store queues, etc. in a microprocessor so that their size may be dynamically expanded and contracted. This is accomplished by allocating and deallocating individual resource units to each resource based on sampled estimates of the instantaneous resource needs of the program running on the microprocessor. By keeping unused datapath resources to a minimum, power and energy savings are achieved by shutting off resource units that are not needed for sustaining the performance requirements of the running program. Leakage energy and switching energy and power are reduced using the described methods.

A method for controlling an active-clamp flyback power converter is provided. The control method comprises: generating a first switch signal according to an output voltage and a current sensing signal, and selectively generating a second switch signal in a complementary or non-complementary control mode according to the current sensing signal and the first switch signal. The first switch signal is coupled to drive a low-side power switch for switching a transformer and the output voltage regulation of the active-clamp flyback power converter. The second switch signal is coupled to drive a high-side power switch for recycling leakage energy of the transformer and achieving a soft-switching of the low-side power switch. With the control method, the high-side power switch can adaptively switch in a complementary or non-complementary control mode depending on the output load and input voltage conditions.

The invention relates to a stray energy power supplying method of an electrical equipment status monitoring wireless sensing system; a vibration power-generating device, or a temperature difference power-generating device or a flux leakage power-generating deice is adopted to lead mechanical vibration energy or heat energy or flux leakage energy which is generated in the operating process of the electrical equipment to be converted into electrical energy, and the electrical energy is transformed and adjusted by a transformation module, and the transformed electrical energy is stored in an energy storage device such as a rechargeable battery, a capacitor and the like, so as to supply power for the node of the electrical equipment status monitoring wireless sensor. A device applied to the stray energy power supplying method comprises a stray energy power-generating module such as vibration power generation, temperature difference power generation or flux leakage power generation, an electrical energy conversion module and an electrical energy storage module which are arranged on the electrical equipment. The invention can effectively utilize stray energy generated in the operating process of the electrical equipment to supply power for the node of the wireless sensor.

A method and controller for controlling a converter are provided. The converter is operated in a first phase in which controller logic asserts a first gate drive signal to cause a first transistor of the converter to be conductive and deasserts a second gate drive signal to cause a second transistor of the converter to be non-conductive. In a first deadtime phase and a second phase, the controller logic deasserts both the first and second gate drive signals to cause leakage energy from a leakage inductance of a primary winding of the converter to be transferred to a clamp capacitance of the converter. After the leakage energy is transferred, the converter is operated in a third phase in which the logic asserts the second gate drive signal and deasserts the first gate drive signal.

The present invention relates to a single-level step-down LED driving circuit of leakage energy feedback. The circuit comprises an input AC power supply Vin and an LED lamp load, a power MOS switch tube Q1, a power MOS switch tube Q2, a rectifier power diode D1, a rectifier power diode D2, a rectifier power diode D3, a rectifier power diode D4, a fast recovery diode D5, a fast recovery diode D6, a fast recovery diode D7, a fast recovery diode D8, a fast recovery diode D9, a fast recovery diode D10, an intermediate electrolytic capacitor CB, an output electrolytic capacitor Co, a pre-stage Buck circuit inductor LBuck, a transformer Tr and an equivalent leakage inductor Llk thereof. According to the single-level step-down LED driving circuit, a pre-stage Buck circuit and a double-tube flyback circuit used by a back-stage leakage energy feedback are integrated into a single-stage LED driving circuit, and the functions of low voltage switch stress, high conversion efficiency and constant current output are realized.

The invention is concerned with the correcting convertor of the single power factor circuit. The positive output end of the rectifier of the transformer meets the tip of the primary winding of the transformer, the bottom of the primary winding of the transformer meets the negative output end of the rectifier with the switch in the middle, the cathode of the first diode meets the positive end of the rectifier, the anode of the first diode meets the negative end of the rectifier with the circuit in series in the middle, which composes by the second diode and the second winding of the transformer, the storing capacitance anode meets the connecting point that is in the middle of the series circuit and the first diode anode, the storing capacitance cathode meets the negative end of the rectifier. The invention can eliminate the surge current generated by the power during starting up, can reduce the voltage of the storing capacitance to less than 250V, and it can recycle the magnet leakage energy of the transformer to improves power efficiency. It suits for the switch power in middle or small power.

An active clamping-boosting inverter of high-gain isolation type is prepared as realizing high gain output of said inverter by series-connecting the third winding to output capacity of two coupled inductances, absorbing and transferring leakage energy of two coupled inductances nondestructively by series circuit prepared by the first clamping capacity and the first auxiliary switching tube, utilizing series circuit and parallel capacity to realize zero voltage turn on and turn off of said auxiliary switch.

The isolated current regulated DC-DC converter is composed of the step down switch SA, free wheel diode DA, step down inductor L, switches S1 and S2, capacitor Cc to absorb the leakage energy of the switching transformer, output diodes D3 and D4, output filter capacitor C and the switching transformer T; one terminal of the step down inductor L is connected with the step down switch SA and free wheel diode DA, and other terminal of the step down inductor L is connected with one of primary windings of the switching transformer and switch S1 or S2; two primary windings of the switching transformer are respectively connected with switches S1 and S2 in series; two primary winding and switch S1 or S2 branches are paralleled and respectively connected with the free wheel diode DA and the step down inductor L; the free wheel diode DA is series with the step down switch SA and they connect with the input voltage Vin; the capacitor Cc to absorb the leakage energy of the switching transformer is respectively connected with switches S1 and S2; the full wave rectifier is composed of two secondary windings and output diodes D3, D4; the output capacitor C is paralleled with the output load. The converter has the same voltage and current stress and dynamic regulation as one of regular step down DC-DC converter. It also has function to isolate the input and the output with the switching transformer. In practical application, due to the freedom of the switching transformer's turns-ratio, it is possible to make the isolated current regulated DC-DC converter to operate in much better condition than one for the regular step down DC-DC converter and to have higher efficiency.

A method for optimization of a frequency spectrum includes the following steps: sampling a time domain signal to obtain an initial sampling signal based upon a first subset of sample points; transforming the initial sampling signal to a frequency domain signal; determining a frequency parameter and an amplitude parameter for each of harmonic components of the frequency domain signal; establishing a leakage energy equation and a graduation shifting quantity; determining an optimum number of sample points that will result in minimum leakage energy; obtaining an adjusted sampling signal based on a second subset of the sample points, wherein the number of the sample points in the second subset is equal to the optimum number; and transforming the adjusted sampling signal to an optimized frequency domain signal having harmonic components associated with graduations of an optimized frequency spectrum, wherein the graduations are calculated based upon the graduation shifting quantity.

Ultrasonic energy in the form of guided waves is launched into the wall of a fluid-filled container. The guided wave propagates around the circumference of the container from a transmitting transducer to a receiving transducer. Part of the guide wave energy leaks into the fluid in the form of bulk waves, reflects off the inner wall on the other side and enters back to the receiving transducer trailing the direct wave. Analysis of the received waves determines the presence of corrosion pitting and MIC nodules on the container inner wall, and fluid level. In addition, it determines whether foreign objects are inside the container. The guided waves are created with wideband transducers excited at certain frequencies that depend on the material and geometry of the part being measured. The leakage energy is maximized with a shaped tone burst pulse at the specified frequency. The energy and energy ratio of both the direct and leakage fields are measured and related to the container inner wall condition and the presence of any foreign objects in the fluid.

The invention aims to provide a steam turbine rotor cooling system which can cool the high-temperature rotor of the steam turbine, reduce steam leakage energy loss and also reduce temperature of a bearing and lubricating oil, meanwhile is high in automation degree of adjustment and control and can improve safe operation of the steam turbine. The specific technical scheme is as follows: a system for cooling a high-temperature steam turbine rotor by gland seal is characterized by comprising a gland sealing system composed of steam turbine gland seals, a pressure equalization box, a stop valve, a regulating valve, a self-operated pressure regulator and a plurality of pipelines, wherein the first pipeline is used for connecting any position, with the pressure of high than 0.135MP, in the steam turbine body to the pressure equalization box, a regulating device composed of the stop valve, the regulating valve and the self-operated pressure regulator are arranged on the first pipeline, and thereby keeping the pressure in the pressure equalization box within the range of 0.13-0.135MPa; the second pipeline is used for connecting the pressure equalization box to the second last gear cavities on the front and rear sides of the steam turbine gland seal to serve as the steam supply pipeline of the steam turbine gland seal.

A power conversion apparatus, which converts power of a DC power supply and provides it to a plurality of loadings, includes a transformer, an electronic switch, a leakage energy recycling circuit, and a plurality of output circuits. The transformer has a plurality of primary windings, which receives the power, and a plurality of secondary windings, which outputs the converted power. One end of the electronic switch is electrically connected to the primary windings; the other end thereof is electrically connected to the DC power supply. The leakage energy recycling circuit is electrically connected to the primary windings, and repeatedly and alternatively outputs the powers of positive and negative voltage. The circuit receives and stores leakage energy of the transformer, and feedbacks it to the transformer. The output circuits are electrically connected to the secondary windings to receive the converted power and to provide it to the loadings.

A method is shown to improve the resonant transition controlled flyback converter presented in Ser. No. 14 / 274,598 (Exhibit A) by adding a clamp circuit that recycles the leakage energy. By utilizing the particular advantages of the resonant transition controlled flyback converter an optimized clamp capacitor can be used to increase the efficiency of the converter further.

A remote control circuit includes a rectifying filter circuit coupled to an alternating current (AC) power source, a power supply module connected to the rectifying filter circuit; a leakage energy collecting circuit connected to the rectifying filter circuit; a remote control signal receiving circuit connected to the leakage energy collecting circuit; and a switch circuit connected to the remote control signal receiving circuit and the power supply module. When the remote control signal receiving circuit receives a remote power on signal, the remote control signal receiving circuit outputs a first signal to the switch circuit, and the switch circuit switches on the power supply module. When the remote control signal receiving circuit receives a remote power off signal, the remote control signal receiving circuit outputs a second signal to the switch circuit, the switch circuit switches off the power supply module.

A power conversion apparatus, which converts power of a DC power supply and provides it to the loading, includes a transformer, an electronic switch, a leakage energy recycling circuit, and a output circuit. The transformer has a primary winding, which receives the power, and a secondary winding, which outputs the converted power. An end of the electronic switch is electrically connected to the primary winding; another end thereof is electrically connected to the DC power supply. The leakage energy recycling circuit is electrically connected to the primary winding, and repeatedly and alternatively outputs power of positive and negative voltage. The circuit receives and stores leakage energy of the transformer, and feedbacks it to the transformer. The output circuit is electrically connected to the secondary winding to receive the converted power and to provide it to the loading.

The invention provides an in-band perception method based on an LTE (Long Term Evolution) frequency domain guard band, which comprises the steps that: whether a master user signal and a non-LTE secondary user signal exist is comprehensively analyzed and judged according to energy on the intersystem guard band fed back by a user; if only leakage energy and receiver noise are available on the intersystem guard band, the master user signal or the non-LTE secondary user signal does not exist, or else, the master user signal or the non-LTE secondary user signal exists. According to the in-band perception method based on the LTE frequency domain guard band, a data transmission situation of a master user on a perception band can be perceived, data transmission situations of other non-LTE secondary users can also be perceived, a frame structure is not changed, and the influence on the existing LTE system protocol is minimum.

The invention discloses a design method suitable for a near-threshold and sub-threshold low electric leakage standard cell, and belongs to the technical field of digital integrated circuits. The design method comprises selecting standard devices of predetermined dimensions to build an inverter and calculating N / P electric leakage ratios of the standard devices; building a standard cell circuit and dividing leakage current and time delay of the standard cell circuit from sources thereof, calculating and obtaining N / P electric leakage coefficient ratios and N / P time delay coefficient ratios of the standard cell circuit, and therefore obtaining the optimal N / P electric leakage ratio of the standard cell circuit with minimum electric leakage energy consumption; and calculating adjusting parameters according to the N / P electric leakage ratios of the standard devices and the optimal N / P electric leakage ratio of the standard cell circuit, designing dimensions according to the adjusting parameters, and obtaining the optimal dimensions of NMOS transistors and PMOS transistors forming the standard cell circuit when the electric leakage energy consumption is minimum. The standard cell designed according to the method has low electric leakage characteristics, and therefore low-power digital circuits can be designed.

The invention discloses an integrated anti-leakage energy-saving noise reduction roof system which comprises a plurality of roof purlines and a compression metal roof. The roof purlines are mounted on a building, the compression metal roof is mounted on the roof purlines, a roof support structure is mounted on the compression metal roof and comprises supports and transverse beams, the supports are fixedly mounted on the compression metal roof, the transverse beams are arranged on the supports, rigid polyurethane foam is sprayed on the compression metal roof, waterproof ventilation films are laid on the rigid polyurethane foam, a noise reduction screen mesh covers the waterproof ventilation films, and an additional compression metal plate roof layer which is fixedly mounted on the transverse beams is arranged on the noise reduction screen mesh. The integrated anti-leakage energy-saving noise reduction roof system has the advantages that the anti-leakage capacity of the integral roof can be effectively improved, obvious energy-saving and heat-insulation effects can be realized, and noise in houses can be effectively lowered.

The invention provides a device and method for detecting microwave leak in real time based on array antennae, and belongs to the field of microwave detection. According to the device and method for detecting microwave leak in real time based on the array antennae, the antenna array is combined with multi-classification models, the condition of microwave leak of equipment can be automatically detected in real time during usage of the microwave equipment, not only the microwave leak conditions of the portions near the antennae but also the microwave leak conditions of the portions away from theantennae can be detected, the leak positions are judged by utilizing a related classification algorithm, and after the positions are affirmed, a trained data treatment module is utilized to calculatethe magnitude of leakage energy; when the leaked energy exceeds a preset threshold value, a power supply is automatically disconnected, and the device stops working, so that the personal and propertysafety of a user is effectively guaranteed; meanwhile, the leak positions are shown, so that great convenience is brought to later maintenance work.