850 results about "Pulse transformer" patented technology

The present invention provides a reliable, high-repetition rate, production line compatible high energy photon source. A very hot plasma containing an active material is produced in vacuum chamber. The active material is an atomic element having an emission line within a desired extreme ultraviolet (EUV) range. A pulse power source comprising a charging capacitor and a magnetic compression circuit comprising a pulse transformer, provides electrical pulses having sufficient energy and electrical potential sufficient to produce the EUV light at an intermediate focus at rates in excess of 5 Watts. In preferred embodiments designed by Applicants in-band, EUV light energy at the intermediate focus is 45 Watts extendable to 105.8 Watts.

A surface mount pulse transformer has a drum type core including a core and first and second flanges disposed on both ends of the core and installed on a substrate and a primary winding wire and a secondary winding wire wound around the core and provided with an intermediate tap, respectively, wherein first and second terminal electrodes being connected to each of both ends of the primary winding wire and a third terminal electrode for connecting being connected to the intermediate tap of the secondary winding wire are disposed on the surface of the first flange and a fourth terminal electrode being connected to the intermediate tap of the primary winding wire and fifth and sixth terminal electrodes being connected to each of both ends of the secondary winding wire are disposed on the surface of the second flange.

An isolation system is provided that is suitable for use in telephony, medical instrumentation, industrial process control and other applications. Preferred embodiments of the invention comprise a capacitive isolation barrier across which a digital signal is communicated. The system provides a means of communication across the isolation barrier that is highly immune to amplitude and phase noise interference. Clock recovery circuitry may be employed on one side of the isolation barrier to extract timing information from the digital signal communicated across the barrier, and to filter the effects of phase noise introduced at the barrier. Delta-sigma converters may be disposed on both sides of the isolation barrier to convert signals between analog and digital domains. An isolated power supply may also be provided on the isolated side of the barrier, whereby direct current is generated in response to the digital data received across the isolation barrier. A bidirectional isolation system is provided whereby bidirectional communication of digital signals is accomplished using a single pair of isolation capacitors. In preferred embodiments, the digital data communicated across the barrier consists of digital delta-sigma data signals multiplexed in time with other digital control, signaling and framing information. Finally, the isolation system may include a pulse transformer to accommodate ADSL circuitry, whereby power is transmitted through the pulse transformer.

In one embodiment, a system may include multiple transformers each to provide an output to one or more power cells, where the power cells provide AC power to a load. Each transformer may have at least one primary winding and multiple secondary windings, where the primary winding of each transformer is phase shifted with respect to its neighboring transformers and the secondary windings are also phase shifted. The phase shift of the primary winding can be based on the phase shift of the secondary windings and a number of the plurality of transformers.

In one embodiment, the present invention includes a system having multiple modular transformers each including a phase-shifted primary winding coupled to an input power source and phase-shifted secondary windings each coupled to a power cell. The system further includes different phase output lines coupled to a load. These lines may include first, second and third phase output lines.

A pulse modulator generates a first pulse signal having a duty ratio which is adjusted such that a detection voltage which indicates the electrical state of an LED string to be driven matches a predetermined reference voltage. A first pulse signal is applied to a primary coil of a pulse transformer. A DC / DC converter includes a switching element the ON / OFF operation of which is controlled according to a signal that originates at a secondary coil of the pulse transformer. The DC / DC converter stabilizes an input voltage Vdc, and supplies the input voltage Vdc thus stabilized to the anode of the LED string.

In one embodiment, the present invention includes a system having multiple modular transformers each including a phase-shifted primary winding coupled to an input power source and phase-shifted secondary windings each coupled to a power cell. The system further includes different phase output lines coupled to a load. These lines may include first, second and third phase output lines.

A switching circuit arranged to switch the input of an input power supply is connected to a primary winding of a transformer at a primary side of the transformer. A digital control circuit including a switching controller arranged to output control pulses to the switching circuit and a rectifying / smoothing circuit connected to secondary windings of the transformer are disposed at a secondary side of the transformer. The digital control circuit outputs the control pulses via a pulse transformer, calculates the input power-supply voltage on the basis of the on-duty cycle of the control pulses, the output voltage, and the ratio of the number of turns of the primary winding to the number of turns of the secondary windings of the transformer, and performs converter control in accordance with the calculated input power-supply voltage.

A synchronous rectifying circuit is provided for flyback power converter. A pulse generator is utilized to generate a pulse signal in response to a leading edge and a trailing edge of a switching signal. The switching signal is used for switching the transformer of the power converter. An isolation device such as pulse transformer or small capacitors is coupled to the pulse generator for transferring the pulse signal through an isolation barrier of a transformer. A synchronous rectifier includes a power switch and a control circuit. The power switch is connected in between the secondary side of the transformer and the output of the power converter for the rectifying operation. The control circuit having a latch is operated to receive the pulse signal for controlling the power switch.

A surface mounted pulse transformer (100) comprising a drum core (1) and a number of coils (3). The drum core includes a core (11), a first flange (12a) and a second flange (12b) disposed on both ends of the core. The number of coils wind around the core to form a primary coil and a secondary coil. A number of electrodes (40) are formed on surfaces of the first and second flanges and to be connected to an external substrate. The ends of the coils are physically and electrically connected to the electrodes. One of the electrodes has an electrode groove (401) for receiving and positioning one end of the coils.

A system includes a low switching frequency power converter configured to be coupled to a solar cell, wherein the low switching frequency power converter is configured to generate alternating current (AC) power based on low voltage direct current (DC) power transmitted from the solar cell and transmit the converted AC power. The system also include a multi-pulse transformer configured to receive the converted AC power and generate transformed power based on the converted AC power, wherein the transformed power comprises power at a voltage level that differs from the a voltage level of the converted AC power.

Embodiments of the present invention provide novel techniques for creating a high speed transformer such as a pulse transformer. In particular, a secondary coil of the high speed transformer may include a single turn. The use of a single turn secondary coil simplifies the design and manufacture of the transformer and aids in more efficient inspections. Further, the single turn secondary coil transformer may reduce the number of vias used to interconnect the components of the transformer. Additionally, the embodiments described herein may significantly improve voltage isolation by single turn coils, and eliminate vias between board layers.

The invention relates to a high-frequency high-voltage switching power supply for electric precipitation. Three-phase alternating-current is input and converted into direct current by a three-phase rectifier filter circuit and then the direct current passes through a high-frequency inverter circuit; a series-parallel connection resonant soft switching circuit is connected between two inverter bridge arms in the high-frequency inverter circuit; the output of the series-parallel connection resonant soft switching circuit is boosted by a high-frequency pulse transformer, the boosted output passes through a high voltage silicon rectifier stack to form high-voltage direct current and the high-voltage direct current is input into an electric precipitator; a DSP controller outputs a control signal to the high-frequency inverter circuit; the input side of the electric precipitator is connected with a voltage and current detection circuit; the detection circuit detects voltage and current and inputs a signal into the DSP controller; the high-frequency inverter circuit is adjusted by the DSP controller; and the DSP controller is connected with an upper computer through a CAN interface so asto realize optimal control. The switching power supply is used for electric precipitation equipment and has the advantages of small volume, light weight, light harmonic pollution, high power factor, high conversion efficiency, and capability of generating waveforms meeting various working condition requirements of the electric precipitation equipment so as to realize energy conservation and emission reduction.

The invention relates to a device which realizes pulse-free transformer voltage-reduction by a pulse-width modulation voltage-reduction mode to enable the efficiency of a charger to be enhanced. A quick charger induces short-time discharge pulse during charging in order to enhance the charging current receptance and achieves the quick charging purpose by depolarization; in the prior art, the discharge current is consumed and wasted uselessly, but the device absorbs the energy of pulse discharged by a storage capacitor and feeds back the energy to a charging circuit to realize back discharge, thereby enhancing the energy utilization efficiency and achieving the dual purposes of quick charge and energy saving. The essential resistance, the voltage and the temperature parameter of a storage battery are detected online in real time, fed back to an intelligent control part of the charger and used for judging the charged state and safety condition of the storage battery to continuously adjust the charging strategy so as to form a complete closed-loop control till the storage battery is charged fully. A safe (i.e. protective measures during charging the storage battery are safe), quick, efficient and intelligent charging process is realized.

The invention discloses a one-way isolated type metal-oxide-semiconductor filed-effect transistor (MOSFET) drive circuit. The one-way isolated type MOSFET drive circuit comprises a level transformation and pulse drive circuit, a pulse transformer, a magnetic reset circuit and an acceleration turn-off circuit. The level transformation and pulse drive circuit is used for level transformation and power amplification on input pulse signals so as to drive the pulse transformer to work. The magnetic reset circuit is used for enabling the pulse transformer to carry out reliable magnetic reset. The acceleration turn-off circuit is used for accelerating turn-on and turn-off of a MOSFET tube, and comprises a capacitor, a second resistor, a third resistor and a PNP type triode. One end of the capacitor is connected with an auxiliary edge synonym end of the pulse transformer, the other end of the capacitor is connected with the second resistor, and the other end of the second resistor is connected with a grid electrode of the MOSFET tube. The third resistor is connected with the capacitor in parallel, a collector electrode of the PNP type triode is connected with an auxiliary edge non-synonym end of the pulse transformer, a base electrode of the PNP type triode and the capacitor are connected with one end of the second resistor, and an emitting electrode of the PNP type triode is connected with the grid electrode of the MOSFET tube.

A synchronous rectifying circuit is provided for flyback power converter. A pulse generator is utilized to generate a pulse signal in response to a leading edge and a trailing edge of a switching signal. The switching signal is used for switching the transformer of the power converter. An isolation device such as pulse transformer or small capacitors is coupled to the pulse generator for transferring the pulse signal through an isolation barrier of a transformer. A synchronous rectifier includes a power switch and a control circuit. The power switch is connected in between the secondary side of the transformer and the output of the power converter for the rectifying operation. The control circuit having a latch is operated to receive the pulse signal for controlling the power switch.

The invention discloses a trigger for triggering a Trigatron gas switch. The trigger comprises a pulse high-voltage generation part and a pulse current generation part which are connected in parallel; the pulse high-voltage generation part and the pulse current generation part are connected through a blocking capacitor and a magnetic switch; and when the trigger works, the trigger firstly outputs pulse voltage and then outputs pulse current. When the trigger works, pulse trigger voltage firstly acts on a trigger gap of the Trigatron gas switch, and the pulse current generation part supplies energy for generating discharge and maintaining plasma after the trigger gap is punctured by the pulse high-voltage. The output voltage polarity, a parameter of a pulse transformer and a parameter of the pulse current generation part of the trigger can be adjusted as required.

The invention provides a synchronous rectifier circuit for the power converter. An impulse signal generating device answers for the front edge and the back edge of the switch signal to generate the impulse signal. The switch signal is used to switch the transformer of the power converter, for instance, an isolation apparatus of the impulse transformer or mini capacitor couple to the impulse signal generating device to transfer the isolation barrier of the impulse signal passing through the transformer. The synchronous rectifier comprises a power switch and a control circuit. The power switch is arranged between the secondary side of the transformer and the output of the power transformer for the rectification. The control circuit having the bolt lock device receives the impulse signal to turn-off the power switch.

The invention relates to a digital soft switch inverter arc welding machine which is controlled by an embedded system. The digital soft switch inverter arc welding machine mainly solves the technical problems of the deficiencies on the control performances and the dynamic response aspect of the traditional welding machine, difficult realization of the real-time control of the welding arc and the improvement of the reliability of an inverter welding machine and so on. A main circuit is controlled by a control circuit to realize the arc welding, the pulse width modulation adopts a soft switch phase-shifting circuit; a pulse drive and protection circuit adopts a drive two magnetic tank type pulse transformer, a capacitor, a twisted-pair line, a TVS tube and a resistor are simultaneously added for continuous protection, thus preventing over-voltage and misconduction of IGBT which is caused by the over-voltage. The digital soft switch inverter arc welding machine is mainly used for various welding.

A pulse transformer is provided with a drum core 2 including a winding core 3 and first and second flanges 4A and 4B, and wires S1 to S4 wound around a winding core 3 of the drum core 2. Terminal electrodes 6a and 6b and a center tap 6c are provided on the flange 4A, and terminal electrodes 6d and 6e and a center tap 6f are provided on the flange 4B. Each end of the wires S1 to S4 is connected to a corresponding one of the terminal electrodes P1 and N1, the center tap CT2, the terminal electrodes P2 and N2, and the center tap CT1. A front end of the terminal electrode 6b is setback toward an outer side surface of the flange 4A, and a front end of the terminal electrode 6e is setback toward an outer side surface of the first flange 4B.

A system and method of analyzing a powered device (PD) in a Power-over-Ethernet (PoE) system are presented. The system includes an Ethernet interface having a physical layer (PHY) chip capable of providing a signal pulse in addition to physical layer 1 functions. The system further includes a pulse transformer, coupled to the PHY chip, capable of relaying the signal pulse provided by the PHY chip to the PD via the transmit line and a second PHY chip. The first PHY chip receives one or more return pulse signals from the PD, analyzes characteristics such as voltage and / or frequency of the return pulse signal(s), and determines attributes of the PD based on those characteristics. The attributes can include powered device validity and power classification. A method of supplying power to a PD is also presented.

The invention discloses a high-repetition rate all-solid-state high-voltage pulse generator which comprises a direct current power supply, a resonance charging circuit, an energy storage capacitor, a step-up pulse transformer and a magnetic pulse compression switch circuit, wherein the direct current power supply is connected into the resonance charging circuit after being connected with a filter capacitor in parallel; the resonance charging circuit then is connected with the two ends of the filter capacitor after being connected with the energy storage capacitor; the two ends of a primary coil of the step-up pulse transformer are connected with the two ends of the energy storage capacitor; and a secondary coil of the step-up pulse transformer is connected into the magnetic pulse compression switch circuit. The invention has the beneficial effects that a high-pressure rapid pulse is generated by adopting a method of combining a power semiconductor switch with a magnetic pulse compression switch to replace a thyratron, is used for discharging and exciting a gas laser and can overcome the defects caused by the thyratron; and the running demands of an excimer laser at high repetition rate and long service life are satisfied.

In a double-ended isolated DC-DC converter, by using a main transformer and first and second pulse transformers, a first power switch of a primary side circuit and a first synchronous rectifier of a secondary side circuit are driven with complementary timing, and a second power switch of the primary side circuit and a second synchronous rectifier of the secondary side circuit are driven with complementary timing. A first turn-off edge signal and a first turn-on edge signal generated in a primary side control circuit are transmitted to the secondary side via the first pulse transformer so as to generate a driving signal of the first synchronous rectifier. In addition, a second turn-off edge signal and a second turn-on edge signal generated in a primary side circuit are transmitted to the secondary side via the second pulse transformer so as to generate a driving signal of the second synchronous rectifier.

The invention discloses a power switch device pulse transformer isolation driving circuit. The power switch device pulse transformer isolation driving circuit comprises a primary-side circuit, a pulse transformer Tr and a secondary-side circuit, wherein the primary-side circuit comprises an NPN transistor Q2, a PNP transistor Q3 and a blocking capacitor C1, and the secondary-side circuit comprises a power switch device Q1, a driving resistor Rg, a gate discharge resistor Rs, a diode D1, a compensation capacitor C2, a voltage-regulator tube Z1 and a negative pressure holding capacitor C3. The power switch device pulse transformer isolation driving circuit of the invention can be applied to all switching converters such as a boost converter, a buck converter, a forward converter, a flyback converter, a half-bridge switching converter, a half-bridge converter, a full-bridge converter and a push-pull converter, and can effectively improve the reliability of the switching converters.

Disclosed herein is a pulse transformer that includes a drum core having a winding core portion and first and second flange portions, a plate core connected to the first and second flange portions, and a plurality of wires that are wound around the winding core portion. The first and second flange portions and the plate core are ground such that an inductance of the pulse transformer is 350 μH or more when a bias current of 8 mA is applied to the wires.

A method and apparatus for controlling and monitoring an H-bridge via a single communication path. The apparatus comprises a first control and monitor module coupled to a first switch within the H-bridge; and a first pulse transformer coupled to a first control signal to the first control and monitor module, wherein the first control and monitor module (i) generates, based on the first control signal, a first driver signal for operating a first switch of the H-bridge during DC / AC power conversion, (ii) monitors at least a portion of the H-bridge for at least one fault, and (iii) communicates, upon detecting the at least one fault, a first fault indication to a main controller of the H-bridge via the first pulse transformer.

The invention discloses a switch and capacitor integrated quick discharge unit. Two capacitors and a switch arranged between the two capacitors form a coaxial structure; a high-voltage electrode (2; 12) is led from a capacitor and is simultaneously used as the high-voltage electrode of a gas switch; and the capacitors and the switch commonly share one insulating shell. By adopting the discharge unit, under the same energy storage condition, the module dimension and the branch inductance can be reduced obviously; the output current can be improved; the boosting time can be reduced; the discharge current peak can be improved, the pulse current front can be shortened, and the switch and capacitor integrated quick discharge unit has wide application in pulse power primary energy storage Marx generators and linear pulse transformer driving sources.

A switch driving circuit for driving a full-controlled power switch is disclosed, including a pulse-width modulation unit, a pulse transformer, an anti-interference module, a pulse-width demodulation unit and a driving-power amplifier. The pulse-width modulation unit converts a driving input signal into a positive-negative narrow pulse-width signal. The anti-interference module is coupled to the secondary side and the positive-negative narrow pulse-width signal includes multiple positive pulses and negative pulses. The anti-interference module filters out the ones from the positive pulses and negative pulses of which the pulse amplitude does not reach an effective threshold, and meanwhile the anti-interference module suppress a common-mode noise caused by a high voltage transient variation at a moment when the full-controlled power switch is turned on or off. The pulse-width demodulation unit converts the filtered positive-negative narrow pulse-width signal into a driving output signal.

Two excimer lasers have individual pulsing circuits each including a storage capacitor which is charged and then discharged through a pulse transformer to generate an electrical pulse, which is delivered to the laser to generate a light pulse. The time between generation of the electrical pulse and creation of the light pulse is dependent on the charged voltage of the capacitor. The capacitors are charged while disconnected from each other. The generation of the electrical pulses is synchronized by connecting the capacitors together for a brief period after the capacitors are charged to equalize the charging voltages. The capacitors are disconnected from each other before they are discharged.