222results about How to "Increase input power" patented technology

A microwave emission mechanism includes: a transmission path through which a microwave is transmitted; and an antenna section that emits into a chamber the microwave transmitted through the transmission path. The antenna section includes an antenna having a slot through which the microwave is emitted, a dielectric member through which the microwave emitted from the antenna is transmitted and a closed circuit in which a surface current and a displacement current flow. A surface wave is formed in a surface of the dielectric member. The closed circuit has at least: an inner wall of the slot; and the surface and an inner portion of the dielectric member. When a wavelength of the microwave is λ₀, a length of the closed circuit is nλ₀±δ, where n is a positive integer and δ is a fine-tuning component including 0.

The present invention relates to a method for optical fiber transmission which can increase a transmission distance. A first optical fiber having dispersion is first provided. An optical signal is next supplied to the first optical fiber so that the optical signal is compressed on the time axis as propagating in the first optical fiber. In the case that the dispersion is normal dispersion, for example, prechirping is performed so that the optical signal has down-chirp. A compressed optical signal output from the first optical fiber is supplied to an optical device having a saturated gain. According to this method, the transmission distance can be increased by the effective combination of compression of the optical signal and waveform shaping by the optical device.

Disclosed are a leadframe having heat sink supporting parts, a light emitting diode package in which the leadframe is employed, and a fabricating method of a light emitting diode package using the leadframe. The leadframe includes an outer frame surrounding a predetermined region. The heat sink supporting parts extend inward to face each other from the outer frame. Each of the supporting parts has an end portion coupled to a heat sink. Further, lead terminals extend inward to face each other from the outer frame. The lead terminals are spaced apart from the supporting parts. Accordingly, a package main body can be formed by an insert molding technique after the heat sink is coupled to the end portions of the supporting parts, and the heat sink and the lead terminals can be easily aligned.

A circuit arrangement for deriving electrical power from a received electromagnetic field to power a transponder includes a detuning unit connected between two antenna terminals for limiting the power absorbed by the antenna. The detuning unit includes a component having an impedance that passively varies or is actively varied dependent on the field strength of the field prevailing at the antenna. One arrangement of the detuning unit includes two varactor diodes connected anti-parallel between the antenna terminals. Another arrangement of the detuning unit includes a varactor arranged in series between two capacitors between the antenna terminals, a field strength detector, and a controllable voltage source connected to apply to the varactor a control voltage that varies depending on the detected field strength. Thereby, the input impedance varies depending on the field strength, to achieve impedance matching for a low field strength, and a mis-matched condition for a high field strength.

Multi-state radio frequency (RF) attenuator configurations that include bridged-T type, pi-type, and T-type structures each having a programmable throughput section and a coupled programmable shunt section. The throughput sections and shunt sections may be configured in various combinations of parallel and serial fixed or selectable resistance elements such that multiple resistance states and impedance matching states can be programmatically selected, and may include stacked switch elements to withstand applied voltages to a specified design level.

An outside air temperature sensor (231) for detecting the temperature of outside air, and a control means (240) for controlling the operating capacity of a supercool compressor (221) are provided. The control means (240) controls the operation of the supercool compressor (221) based on the state of refrigerant of a refrigerant circuit (20) flowing through a supercool heat exchanger (210) and the temperature of outside air detected by the outside air temperature sensor (231).

In a wavelength division multiplexed optical transmission system wherein the zero dispersion wavelength of the optical fiber transmission path 224 is in the 1550 nm region, among multiplexed optical signals, the wavelengths of either of at least two optical signals are allocated between 1450 nm and 1530 nm, or between 1570 mn and 1650 nm.

The invention relates to an electric heating device and provides an electric heating control method with continuously adjustable power. The method comprises the following steps: firstly, a system receives a target temperature input by a user and calculates target power according to the target temperature, and the target temperature is in direct proportion to the target power; then the system detects real-time input voltage value, calculates the real-time power difference according to the real-time input voltage value and the target power and calculates the real-time duty cycle according to the real-time power difference, and the real-time power difference is in direct proportion to the real-time duty cycle; finally, the system modulates the output power of a power module according to the real-time duty cycle. The power output of the heating device is adjusted in real time according to the difference change of the current temperature and the target temperature, so that the effects of improving the heating comfort, improving the energy efficiency of an air conditioner, prolonging the service life of the product and reducing the energy consumption are realized, and the method is applicable to air conditioners, electric heaters and electric blankets.

The invention discloses a position sensor-free control apparatus and a position detection method. The apparatus that is applied to a permanent magnet motor comprises: a current determination unit, which is used for determining a q-shaft current value I q of the permanent magnet motor at T1 time; a shaft error detection unit, which is connected with the current determination unit and is used for receiving the q-shaft current value I q and determining a shaft error delta theta of the permanent magnet motor at the T1 time at least based on the q-shaft current value I q, an induced voltage constant setting value Ke* of the permanent magnet motor and a q-shaft inductance value L q* of the permanent magnet motor; and a position detection unit, which is connected with the shaft error detection unit and is used for determining a position theta c of a rotor of the permanent magnet motor at the T1 time based on the shaft error delta theta.

The present invention relates to an electrode device (1, 2) for gas discharge sources and to a gas discharge source having one or two of said electrode devices (1, 2). The electrode device (1, 2) comprises an electrode wheel (7) rotatable in a rotational direction around a rotational axis (22), said electrode wheel (7) having an outer circumferential surface (24) between two side surfaces (25). An electrode wheel cover (8) is provided which covers a portion of the outer circumferential surface (24) and the side surfaces (25) of the electrode wheel (24). The cover (8) is designed to form a cooling channel (12) in the circumferential direction between the cover (8), the outer circumferential surface (24) and radially outer portions part of the side surfaces (25), and to form a gap (23) between the cover (8) and the outer circumferential surface (24) in extension of the cooling channel (12) in the circumferential direction. The gap (23) has a smaller flow cross section than the cooling channel (12) and limits a thickness of the liquid material film formed on the outer circumferential surface (24) during rotation of the electrode wheel (7). Alternatively to the gap (23) the cover (8) may be designed to inhibit the formation of such a film from the liquid material flowing through the cooling channel (12). The cooling channel (12) allows at the same time cooling of the electrode wheel (7) by the liquid material circulating through the cooling channel (12). With the proposed design of the cover (8), an efficient cooling of the electrode wheel (7) is achieved, allowing high electrical powers for operating gas discharge sources with such an electrode device.

The invention discloses an III-nitride semiconductor device and a manufacturing method for the same. The III-nitride semiconductor device comprises a nitride semiconductor layer, a passivation layer, a source, a drain and a gate, wherein the nitride semiconductor layer and the passivation layer are grown on a substrate; the gate is positioned between the source and the drain; the nitride semiconductor layer comprises a nitride nucleating layer, a nitride buffer layer, a nitride trench layer and a nitride potential barrier layer; the passivation layer is etched in a gate area until the nitride potential barrier layer is exposed, and a groove is formed in the gate. According to the device and the method, a combined structure of a composite dielectric layer is adopted between the nitride potential barrier layer and a gate metal layer, and the composite dielectric layer comprises a nitride dielectric layer, an oxynitride dielectric layer and an oxide dielectric layer, which are sequentially formed from the substrate, so that the increase of interface state density is avoided; compared with a conventional III-nitride semiconductor device with a single oxide dielectric layer, the III-nitride semiconductor device with the composite dielectric layer has the advantage that the electric leakage and current collapse effects of the semiconductor device can be simultaneously reduced.

Disclosed are a control circuit and control method for a comparator-controlled type DC-DC converter that can prevent the generation of audible noise due to the difference between relevant switching frequencies and prevent the increase in the input power source ripple voltage. A phase comparator FC outputs a compared-result signal CONT in correspondence with the phase difference between an output signal FP2 and a delay signal FR1. A delay circuit DLY2 performs a feedback control for adjusting the amount of retardation time in correspondence with the compared-result signal CONT. And, the delay circuit DLY2 outputs a delay signal FR2 after the passage of a prescribed amount of retardation time from the time when the falling edge of an output signal SQB2 has been input. At a time t16 that is after the passage of a prescribed amount of time, there is obtained a time delay DT2b that causes the period TT1 of the delay signal FR1 and the period TT2b of the output signal FP2 to coincide with each other and that makes zero the phase difference between the delay signal FR1 and the output signal FP2.

The invention discloses a water-electricity hybrid power cooling tower. The water-electricity hybrid power cooling tower is provided with a tower body, a fan, a water turbine, a water distributor, heat dissipation materials, a motor, a transmission mechanism, a temperature sensor and a control chip circuit board, wherein the tower body is formed by the enclosing of a shell; the fan is arranged at the top of the tower body and is used for discharging damp and hot air in the tower body; the water turbine is connected with the fan by a power output shaft and is arranged at the upper part of an inner cavity of the tower body; the water distributor is arranged in an inner cavity of the tower body, the heat dissipation materials are arranged below the water distributor and are used for heat exchange of water and air; the transmission mechanism is arranged between the motor and the power output shaft of the water turbine; the temperature sensor is arranged in a collecting tank of the tower body; and the control chip circuit board is electrically connected with the temperature sensor and the motor. The water-electricity hybrid power cooling tower has the beneficial effects that the change condition of the water temperature of the cooling tower can be detected automatically, and when the water temperature exceeds a preset value, the motor is started and driven and has a resultant force with the water turbine so as to drive to the fan to rotate, and the input power of the fan is increased, so that the temperature reducing capability of the cooling tower is improved, and the water temperature is kept in a set temperature range.

The invention discloses an inductor and resistor compound superconducting reactor. The technical keys are that the superconducting reactor mainly comprises a superconducting inductive coil, a superconducting non-inductive coil, a low-temperature Dewar component, low-temperature insulating sleeves, superconducting binary current leads, superconducting transition leads and low-temperature refrigerant pipelines, wherein the superconducting inductive coil and the superconducting non-inductive coil are both completely soaked in low-temperature refrigerants inside the low-temperature Dewar component; the low-temperature insulating sleeves, the superconducting binary current leads and the low-temperature refrigerant pipelines are all connected with sealing cover plates of the low-temperature Dewar component; the superconducting inductive coil is connected in series with the superconducting non-inductive coil through the superconducting transition leads, and is connected with the superconducting binary current leads, so as to form the inductor and resistor compound superconducting reactor provided with a fixed inductance value and a variable resistance value. The superconducting reactor has the application characteristics of both the fixed inductance value of a single superconducting reactor and the variable resistance value of a single superconducting non-inductive coil, and can simultaneously have the current-limiting and power compensating function of an electric power system, as well as the high-efficient neutral point grounding function.

Anode and cathode is setup at two sides of each electrolyte piece alternately. Opposite polarities at two sides of an electrolyte piece constitutes a single battery. There is an electrolyte-isolated region between two adjacent single batteries. Cathode of single battery is connected to anode of adjacent battery through wire; thus, all single battery in a container is cascaded. Comparing with present dual air chamber battery group, the invention lowers requirement for material and fabricating technique, and reduces size weight.

One or two pieces of adjustable pad are added to optical fiber loop. One DC light base is added i.e. continuous light in power 0dBm - 15dBm is introduced to light amplifier in optical fiber loop. When magnified signal is departed from the amplifier the light base is exported from the optical fiber loop by wavelength division multiplexer. The DC light base nay be generated by another DC light source, and its wavelength is different from wavelength of signal light and control light. A wavelength division multiplexer introduces the wavelength of DC light source in or out of optical fiber loop. Adding DC bias in same power directly onto the control light pulse in use for controlling read/write of buffer generates a DC light base in same wavelength. Inventory controlled optical pulse is adopted. Features are: restraining net gain of fiber loop, the added pad makes loop not generate self-excitation; DC light base restrains noise; and inventory controlled optical pulse raises SNR.

The invention discloses a withstanding power THz (terahertz) triple frequency analogous balance type doubling circuit, relating to the THz circuit technical field, and comprises a radio frequency input waveguide, a quartz substrate and a radio frequency output waveguide; the anode of a multijunction GaAs THz frequency doubling diode which has the cathode connected to a radio frequency matching microstrip line is in connection with a direct current bias end quartz strip line; each direct current bias end quartz strip line is in connection with one end of a capacitor through a gold wire jumper, and the other end of the capacitor is in connection with a same input microstrip line integrated with a low pass filter through the gold wire jumper. The withstanding power THz triple frequency balance type doubling circuit has a simple circuit structure, and can bear larger input power due to the increase of schottky diodes, and realize more stable circuit operation in an analogous balance type frequency doubling mode formed by four multijunction GaAs THz frequency doubling diodes.

Systems and methods for operating a heater for a passenger cabin of a vehicle. In one example, fan speed of an evaporator cooling fan is adjusted to improve heating efficiency. In particular, fan speed is incrementally increased and maintained at the higher speed if output power of a compressor is reduced by more than an amount of power used to incrementally increase the fan speed.

The invention relates to a shell turn type inner-curve radial plunger hydraulic motor, which comprises a machine casing composed of a front cover, a stator and a rear cover. The machine casing is provided with an oil through shaft, a rotor and an oil distribution disc. The shell turn type inner-curve radial plunger hydraulic motor is characterized in that the oil distribution disc is sleeved on the oil through shaft and fixed with an inner scapula of the rear cover, a fixed brake seat is fixed on the periphery of the oil through shaft, the machine casing can rotate around the axis relative to the oil through shaft, and a plurality of dynamic friction sheets and a plurality of static friction sheets which are arranged at mutual intervals and in an overlaying mode are sleeved on the periphery of the fixed brake seat. A plunger is further arranged in the rear cover and sleeved on the fixed brake seat and can glide in the axial direction, a spring enabling the plunger to keep the mutual tight compression between the dynamic friction sheets and the static friction sheets is further arranged in the rear cover, a sealed oil cavity is formed between the plunger and fixed brake seat, and the fixed brake seat is provided with an oil hole communicated with the oil. The shell turn type inner-curve radial plunger hydraulic motor is provided with a brake structure organically combined with the hydraulic motor, thereby being compact and reasonable in structure.

The invention discloses an electromagnetic energy collection structure integrating a super surface and a gradient-index planar lens, comprising a dielectric substrate, a micro-strip line, a planar lens body, and a super surface. The micro-strip line is arranged on the upper surface of the dielectric substrate, the refractive index gradient of the planar lens body changes gradually, and the phase gradient of the super surface changes gradually. The planar lens body is a body unit structure matrix composed of more than one planar lens body units, the sizes of the planar lens body unit structures in the middle column symmetrically and gradually decrease from the horizontal axis of symmetry as the center to the upper and lower sides, and the planar lens body unit structures in the columns at the two sides are of the same size. Spatial electromagnetic wave can be effectively converted into surface wave and energy can be concentrated, so that efficient energy collection is realized. The electromagnetic energy collection structure has a good application prospect in such fields as the Internet of things, radio frequency identification (RFID), wireless sensor network (WSN) and energy collection and recovery.

There is provided a distortion compensation circuit that can compensate for the nonlinearity of an amplifier having the characteristic that the gain is reduced and the phase is delayed with an increase in input power. An inductor 112 is connected in series with a diode 105 of a distortion compensation circuit 100. The resistance components of the diode 105 decrease with an increase in input power, so that the effect of the impedance of the inductor 112 connected in series with the diode 105 appears, and the impedance of the distortion compensation circuit 100 becomes inductive, producing the characteristic that the phase is advanced. At the same time, the resistance components of the diode 105 decrease with an increase in input power, thus producing the characteristic that the loss is reduced and the gain is increased.