Abstract: A power device for use in a vehicle includes a housing, a voltage converter, and a charge-storing device. The housing carries the voltage converter and the charge-storing device. The voltage converter includes a circuit that converts a power signal having a first voltage level to a second voltage level. The charge-storing device electrically couples with the voltage converter and stores the power signal having the second voltage level.

Abstract: A converter control circuit applicable to various topologies of converters each employing two switching devices is disclosed. The converter control circuit includes an oscillator for generating a pulse signal and triangle-wave signal of a certain frequency, a switching control signal output unit for outputting a switching control signal to control ON/OFF of a plurality of switching devices based on a duty ratio determined from a feedback signal which is applied to a feedback terminal, a mode select signal generator for generating a mode select signal for determination of a control mode of a converter in response to the feedback signal applied to the feedback terminal, and a mode selecting unit for selecting the control mode in response to the mode select signal.

Abstract: A switching power supply device has a drive circuit that can minimize a loss while being compact. The drive circuit turns on and off a high-side switching element (MOSFET) according to a positive or negative voltage developed at a tertiary winding of a transformer. The drive circuit includes a control unit that detects the development time, during which the negative voltage is developed at the tertiary winding, as the on time of a low-side switching element, and makes the on time of the high-side switching element nearly or substantially equal to the development time.

Abstract: A switching power supply unit is provided which provides improved response for frequency switching with a smooth rise in voltage. The switching power supply unit includes: a rectifier circuit for rectifying an alternating current from an AC power source into a direct current; a switching circuit for switching the current rectified by this rectifier circuit using a switching device; a pulse oscillator circuit for outputting a switching signal to the switching device; and a transformer circuit for stepping a voltage up or down depending on the current switched by this switching circuit. A frequency switching unit is also used to detect a pulse output from the switching circuit. Based on the state of this pulse output, the frequency switching unit changes a resistance using resistors, thereby switching the frequency of the switching signal in the pulse oscillator circuit.

Abstract: A bidirectional active power conditioner includes a DC side, a bidirectional DC/DC power converter, a DC/AC inverter and an AC side. The DC side electrically connects with a DC source while the AC side electrically connects with a load and an AC source. The bidirectional DC/DC power converter is controlled via high-frequency pulse width modulation (PWM) switching so as to generate a predetermined DC voltage or DC current while the DC/AC inverter is controlled to convert the predetermined DC voltage or DC current into a predetermined AC voltage or AC current.

Abstract: The present the invention provides power supplies and circuitry for powering high-voltage devices.

Abstract: In accordance with the switching operation of a switching section, current is made to flow from a battery to an inductor repeatedly. A voltage generated at the inductor is smoothed by a condenser and then input to a regulator. A D/A converter within a CPU monitors the input to the regulator, and an output voltage of the regulator stabilizes a reference voltage of the D/A converter.

Abstract: A timing control circuit (70) generates staggered signals from a pulse width modulated signal (68) providing lossless switching in a DC to DC power converter (10). The DC to DC power converter (10) comprises two input MOSFET switches (22, 28) coupled to primary windings (34) of an isolation transformer (36) and two output MOSFET switches (38, 50) coupled to secondary windings (48) of the isolation transformer. The timing circuit (70) comprises an input terminal (90) for receiving a pulse width modulated signal (68) that switches low at time t1 and high at time t4. A first timing output signal circuit (92) is responsive to the pulse width modulated signal (68) and provides a first timing output signal (72) that switches low at time t1 and high at time t7 to control one of the input MOSFET switches (22).

Abstract: A series resonant converter (SRC) power supply with a wide input range and high efficiency includes at least one SRC connected to a respective at least one synchronous/asynchronous rectifier operative to receive phase control. Efficient power conversion in a wide input voltage range of about 1:11 is achieved by using both frequency control of the SRC and phase control of phase differences between a voltage signal inside the SRC and a voltage signal inside the respective at least one synchronous/asynchronous rectifier coupled to the SRC. Preferably, the phase control is applied, alone or in combination with additional frequency control, after the phase difference reaches 90 degrees and up to a phase difference of 180 degrees.

Abstract: A series resonant converter (SRC) power supply with a wide input range and high efficiency is achieved by using both frequency control of the SRC and phase control of phase differences between a voltage signal inside the SRC and a voltage signal inside a synchronous/asynchronous rectifier coupled to the SRC. Preferably, the phase control is applied, alone or in combination with additional frequency control, after the phase difference reaches approximately 90 degrees and up to a phase difference of 180 degrees.

Abstract: A series circuit in which a first switching element and a second switching element are connected in series at both ends of an output of an input rectifier circuit for rectifying an alternating current of an alternating current power supply, a resonant circuit in which a primary winding of a transformer and a current resonant capacitor are connected in series at both ends of the first switching element or the second switching element, a rectifying and smoothing circuit for rectifying and smoothing a voltage generated across a secondary winding of the transformer during an on-period of the first switching element or the second switching element, a control circuit for alternately turning on/off the first switching element and the second switching based on a voltage from the rectifying and smoothing circuit, and a voltage detecting circuit for outputting a voltage detecting signal when a voltage at both ends of one switching element of the first switching element and the second switching element, which is turned

Abstract: A power conversion unit and method for converting DC power. The power conversion unit includes a self-oscillating device configured to convert a DC voltage into a self-oscillating alternating current AC signal, a transformer connected to the self-oscillating device and configured to transform the self-oscillating AC signal into a transformed AC signal, and an AC-to-DC converter configured to convert the transformed AC signal into a DC signal. The method generates a self-oscillating current, transforms the self-oscillating current into a transformed AC signal, and converts the transformed AC signal into a DC signal.

Abstract: A power converter includes a transformer having a primary winding and a secondary winding, and a plurality of switches coupled to the primary and secondary winding, the plurality of switches responsive to at least one control signal to short both the primary and secondary winding during a first reset time interval. An electronic device including such a power converter and related methods are also provided. A power converter having a plurality of DC to DC converters coupled in parallel is also provided.

Abstract: Provided is a full-bridge active clamp DC-DC converter for reducing power loss due to high-speed switching by primary switches that are zero-voltage switched by energy stored as a leakage inductance of a transformer when main switches are on or off using a full-bridge active clamp circuit, which can be used at capacity, e.g., more than 1 KW. The full-bridge active clamp DC-DC converter includes a primary circuit and a secondary circuit divided by a transformer, the primary circuit, which is a full-bridge active clamp circuit, comprising an input capacitor Cd, two main switches S1 and S2, two sub-switches S3 and S4, and a clamp capacitor Cc, and the secondary circuit, which is an output rectification circuit for rectifying an output voltage.

Abstract: A switch mode power converter is provided which includes a switching cell with a supply input, an output and a control input. A summing comparator has first and second differential input pairs and an output. The output is connected to the control input of the switching cell. An oscillator provides a periodic waveform that is applied to a first one of the inputs of the first differential input pair of the summing comparator. An adjustable reference voltage source provides an adjustable reference voltage a predetermined fraction of which is applied to a second one of the inputs of the first differential input pair of the summing comparator. An error amplifier has differential outputs coupled to the second pair of differential inputs of the summing comparator and a differential input pair.

Abstract: The invention describes combination I/O modules for automation. Various combinations of inputs and output with different electrical interfaces are offered providing greater flexibility in controller hardware selection.

Abstract: An inverter capable of switching working frequency for activating a lamp. The inverter comprises a voltage converter, a feedback circuit, a control unit and a frequency switcher. The voltage converter transforms a DC input voltage into a second AC voltage according to a control signal. The lamp is activated and generates a feedback current. The circuit converts the feedback current into the feedback voltage. The control unit for generating a first working frequency includes a resonance circuit having a specific resistance and capacitance, and a control device for generating the control signal according to a reference voltage, the first working frequency and the feedback voltage in a predetermined period. Then, the switcher changes the specific resistance and/or capacitance for enabling the control unit to generate a second working frequency. The control device outputs the control signal according to the second working frequency and the feedback voltage.

Abstract: An inverter has a semiconductor switch circuit in the primary winding of a transformer such that each of the switches of the switch circuit is controlled by pulse-width modulation (PWM) to supply a constant ac current and a constant ac voltage to a load, such as a cold cathode fluorescent light, connected to a secondary winding of the transformer. A common slow-start control circuit is provided in the inverter circuit to enable a common slow startup of the PWM control of the output voltage and output current. This arrangement suppresses an excessive voltage and an inrushing current during a startup.

Abstract: A fixed-frequency switching regulator having a noise injection circuit. Noise is injected into the feedback loop of the switching regulator to modify the switching waveform to reduce individual frequency harmonics of the resultant Fourier Series. The reduced frequency harmonics allow the switching regulator to achieve reduced conducted emissions.

Abstract: A buck/boost converter having an input and an output, a switching cell with a switch between the input and the output, and a selector selectively configuring the switching cell into at least two configurations from among the following: a parallel chopper configuration, a series chopper configuration, or an inductive-storage chopper configuration, the cell using the same switch in all the configurations. The converter has a single switch for various modes of operation of the converter.

Abstract: In the current detection circuit that detects the output currents of a switching power supply circuit, an improved current detection circuit makes it possible to detect the output current directions of power supplies solves the malfunction of the power supplies vibrating or diverging during changes in load state and during parallel operation, and thus implements stable operation. The direction of an output current I2 can be detected by using the current detection circuit 8 that has multiple switching elements S1 to S4 each operating synchronously with an inverter circuit.

Abstract: In the proposed method of generating a pulsed output signal from a periodic ramp signal and a reference voltage, the linear range of duty cycles of the pulsed output signal is significantly extended to minimum values. The ramp signal and the reference voltage are applied to inputs of a comparator and the output signal is taken from an output of the comparator. The ramp signal has a ramp that extends between a minimum voltage level and a maximum voltage level. The duty cycle of the pulse signal is controlled by varying the reference voltage between the minimum and maximum voltage levels. The ramp has an initial start section extending from the minimum voltage level and a main section extending between the initial section and the maximum voltage level. The ramp slope has a constant value over the main ramp section and a value greater than the constant value over the initial section.

Abstract: A power system (100) includes power conversion apparatus (110) coupled to load apparatus (120) having at least one load circuit (122,124). The power conversion apparatus includes: a first input (102) for receiving an AC signal; a second input (104) for receiving a DC signal; and a first number of power supply circuits (112) each including an AC conversion circuit (210, 240, 250) for generating an output signal based on the AC signal; a revert circuit (270) coupled to the AC conversion circuit for generating the output signal based on the DC signal, the revert circuit including a battery charger (274), wherein each of the battery chargers is coupled in common at the second input and is configured with a corresponding predetermined capacity that causes at least a portion of the DC signal to be provided by at least a portion of the battery chargers.

Abstract: A switching regulator and method of fabricating a switching regulator is disclosed. In one embodiment a switching regulator comprises a transformer having a primary winding and a secondary winding, an inductor (L) connected to an input of the primary winding, and a capacitor (C) connected across the primary winding of the transformer. The inductor and capacitor form a L-C tank circuit. The switching regulator also includes a frequency source connected to the inductor, wherein the frequency source provides a switching frequency to the inductor that is substantially equal to a resonant frequency of the L-C tank circuit.

Abstract: The output voltage of a dc—dc transformer having a ratio of approximately m/n, and which is powered from a main power supply having a remote sense input, can be stabilized by feeding the output of the dc—dc transformer to the remote sense input of the main power supply through an amplifier having a voltage gain of m/n.

Abstract: A power conversion circuit includes a current section, a transformer, and a voltage section. The current section includes inductors configured to produce a boosted output voltage from a voltage sourse when then current section is operating in a forward direction. The transformer includes a primary winding electrically coupled to the secondary winding and configured to drive a load. The voltage section includes a pluralaty of balancing switchtes configured to actively driven to provide a DC voltage to the load. The balancing switches balance energy between the current section and the voltage section when the power conversion circuit is the load and operating in the forward direction.

Abstract: Techniques for determining root mean square (RMS) values of a signal for controlling operation of grid-linked converters, such as DC-to-AC inverters, via squaring the signal, sampling the squared signal n times during a cycle period to obtain n samples, summing the first n?1 samples to obtain a first value, multiplying the first value by a sampling time and a frequency of the signal to obtain a second value, determining a compensation factor, adding the compensation factor to the second value to obtain a third value, and determining a square root of the third value to obtain a RMS result.

Abstract: A rectifier transformer comprises two secondary windings, preferably with a single turn on each winding. The rectifier diodes form an integral part of each of the secondary windings. Thus, a compact arrangement is realised. In a high voltage application, the rectifier diodes comprise a plurality of relatively low voltage diodes in parallel to one another. The overall capacitance of the rectifier circuit is reduced by this arrangement.

Abstract: A power supply for X-ray generators which includes at least one inverter (11, 12, 13), at least one transformer (111, 121, 131) and at least one voltage cascade (112, 122, 132) for generating a supply voltage for an X-ray tube (15). In order to increase the output power that can be achieved with a comparatively small weight and a low ripple or output capacitance, the voltage cascade is conceived in respect of its capacitances and the stray inductance of the transformers (111, 121, 131) in such a manner that it can be made to operate in the resonance mode by appropriate control of the inverter. In respect of the properties mentioned it is notably advantageous to integrate a two-phase embodiment or three-phase embodiment with an X-ray system so as to form a compact tank generator.

Abstract: The present invention provides a power micromagnetic integrated circuit having a ferromagnetic core, a method of manufacture therefor and a power processing circuit employing the same, that-includes: (1) a substrate; (2) an insulator coupled to the substrate and (3) a metallic adhesive that forms a bond between the insulator and the ferromagnetic core to secure the ferromagnetic core to the substrate.

Abstract: A circuit arrangement for operating a lamp including a first circuit and a second circuit. The first circuit generates a second DC voltage from a first DC voltage and includes a transformer. The second circuit is coupled to the secondary winding of the transformer and supplies current for the lamp. The secondary winding, input terminals of the first circuit and second circuit are coupled together such that the second circuit is provided with a voltage whose amplitude is equal to the sum of the first DC voltage and the second DC voltage resulting in a more efficient transfer of power by the circuit arrangement to the lamp.

Abstract: There is provided a power supply apparatus that can raise the power supply efficiency while an appliance in which the power supply apparatus is installed is in a standby state, with a simple construction, without performing complicated control, and can reliably achieve improved power consumption due to the raise in the power supply efficiency, as well as noise reduction. According to the power supply unit, Conduction and interruption of a current flowing in the primary winding 103 of the transformer T21 is controlled. A voltage generated in the secondary winding 104 of the transformer T21 is rectified and smoothed by the rectifier and smoothing circuit 101. An output voltage of the rectifier and smoothing circuit 101 is compared with a reference voltage and a voltage corresponding to a difference between the output voltage and the reference voltage is outputted by error detection circuit 102.

Abstract: The present invention a method and apparatus for providing a visual messaging device for use with a high-speed network and an electrical supply system for the visual messaging device. The visual messaging device includes a network interface circuit that receives the message data from a network and arranges it in memory unit in usable form (packets) for use by a processor at the high network speed. The electrical supply system utilized with the visual messaging device comprises, in part, a power source, located in a remote location relative to a low voltage, high current device, which provides for the transmission of electrical power to the low voltage, high current device, such as a visual display unit, via relatively thin wiring or cabling passing through an enclosure, such as a plenum air space, without the need of placing the wiring or cabling in a conduit.

Abstract: Modulation control circuitry modulates the equivalent output resistance of a power converter, for example a Sine Amplitude Converter, by varying the ON resistance of the primary switches in the converter. The modulation control circuitry may be used to “soft-start” the converter, perform output current limiting, and to improve current sharing between converters in a power sharing array. Soft-start may be achieved by controlling the rate of rise of the peak voltage applied to the gate control inputs of the primary switches. As the gate voltage passes through a range near the threshold voltage of the primary switches, the ON resistance of the switches, and the equivalent output resistance of the converter, will vary smoothly from a relatively high value to a relatively low value. Current limiting may be accomplished by measuring the output current of the converter and controlling the gate voltages of the main switches in order to keep the current at or below a predetermined level.

Abstract: An integrated circuit which includes at least one DC to DC converter for receiving a supply voltage level and producing at least one intermediate voltage level which is greater than the supply voltage level. The integrated circuit also includes processing circuitry for receiving at least one time-varying input voltage signal and increasing a level of the time-varying voltage signal. The processing circuitry can include analog or digital circuitry or a combination of both analog and digital circuitry, and the time-varying input voltage signal can be an analog signal or a digital signal. The integrated voltage boost power supply can output the increased time-varying voltage signal and a plurality of DC voltages.

Abstract: An electrical power system includes an electric power source, for example, an electrical machine, capable of supplying AC power to a load; a power converter connected to the electric power source; a position estimator for receiving a current feedback signal in Park vector format and providing a synchronous reference frame without the need, for example, of a rotor position sensor in the electrical machine; and a controller configured to provide a voltage command for controlling the power converter, the controller receiving the current feedback signal and a current reference in Park vector format and using the synchronous reference frame, the current feedback signal, and the current reference to produce the voltage command.

Abstract: A power conversion unit and method for efficient conversion of power for one or more variable loads are disclosed herein. Power having a first form is supplied to one or more power conversion units (PCUs) connected to the one or more variable loads. The PCUs are adapted to convert the power from the first form to other forms suitable for use by the components of the destination system. Based at least in part on a predicted load requirement of the variable load, the operation of the PCUs can be controlled to provide sufficient power to the one or more loads at the appropriate time while minimizing wasted power generation by deactivating any unnecessary PCUs during a decrease in power consumption or by activating PCUs during an increase in power consumption.

Abstract: An electromagnetic generator without moving parts includes a permanent magnet and a magnetic core including first and second magnetic paths. A first input coil and a first output coil extend around portions of the first magnetic path, while a second input coil and a second output coil extend around portions of the second magnetic path. The input coils are alternatively pulsed to provide induced current pulses in the output coils. Driving electrical current through each of the input coils reduces a level of flux from the permanent magnet within the magnet path around which the input coil extends. In an alternative embodiment of an electromagnetic generator, the magnetic core includes annular spaced-apart plates, with posts and permanent magnets extending in an alternating fashion between the plates. An output coil extends around each of these posts. Input coils extending around portions of the plates are pulsed to cause the induction of current within the output coils.

Abstract: This invention relates to a power supply that integrates a rectifier/filter's circuitry and a converter's circuitry with an inverter to reduce space occupied and increase power efficiency. The power supply includes: a rectifier/filter, a DC-DC converter and a DC-AC inverter. The rectifier/filter, connected to an alternating current (AC) input terminal, converts the input AC into a direct current (DC). The DC-DC converter and the DC-AC inverter are parallel to each other with one end concurrently connected to the rectifier/filter's output and the other end respectively outputting the desired powers. As such, DC-DC converter reduces the converted DC voltage to lower DC voltages to power all circuits except for the lamp and DC-AC inverter converts the converted DC voltage into higher AC voltage output to drive the lamp.

Abstract: A current-powered converter includes a current source, a switching section connected to the output of the converter, a dispersed inductance being provided between the switching section, and the converter output. A clamping circuit limits the voltage at the input of the switching section. The clamping circuit comprises a capacitor in which energy is stored during at least one phase of the switching cycle of the switching section, and an inductance by means of which the energy stored in said capacitor is returned to the output of the converter.

Abstract: An extended range power supply system includes a power source for providing operational power with a power supply circuit connecting with the power source for regulating the operational power. A current sensing circuit is connected with the power supply circuit, the current sensing circuit including a plurality of current sensing elements, each sensing element configured for a selected output range, with each sensing element individually operatively activated, and each sensing element providing a feedback signal. A control loop compensation circuit is connected with the current sensing circuit for receiving the feedback signal and with the power supply circuit to provide an error signal. The control loop compensation circuit includes a like plurality of control loop compensation components, each operatively associated with one current sensing element for receiving a feedback signal.

Abstract: A pulse width modulation integrated circuit (PWM IC) chip available as an 8-pin DIP or a 14-pin SOP package is characterized by simplified circuit complexity, high package density, more voltage regulation functions and more pin functions. The PWM IC of the present invention uses several internal control circuit to create and define the pin functions thereof and is capable of controlling the switch of the internal power control circuit therein, modulating the operation frequency of the PWM IC, accomplishing the voltage feedback operation of the power supply, sensing the external current and increasing the pulse width of the output pulse signal tardily as the PWM IC starts up. More specifically, because the PWM IC of the present invention employs internal current sources to create and define the pin functions thereof, the PWM IC can be equipped with less pin numbers, simpler circuit complexity and higher package density.

Abstract: A power distribution system is described for supplying power to electronic assemblies, in particular for use in the field of deep ocean oil production. The electrical power is supplied from a voltage source via a supply cable to theprimary winding of a distribution transformer. A number of secondary windings, preferably four, are disposed in addition to the primary winding on the core of the distribution transformer. The windings on the common core are subdivided into a number n of winding packs corresponding to the number n of secondary windings, and with each winding pack containing an n-th part of the primary winding and one of the secondary windings. Electronic assemblies are each connected via a connecting cable to one of the secondary windings.

Abstract: An electrical system is described comprising at least one function board and at least one voltage converter. The function board and the voltage converter are connected such that a voltage generated by the voltage converter is supplied to the function board. The electrical system comprises an electrical circuit for evaluating the voltage required by the function board and for controlling the voltage converter depending on the evaluated voltage.

Abstract: A method of generating low voltage auxiliary power forms for electric or hybrid vehicle use by tapping power from the traction motor primary winding with a secondary winding and rectifier.

Abstract: A switching power supply for preventing the inflow of an electric current from an external when it stops operating. A transistor 32 is connected between a gate of a MOSFET 11 and a first terminal of a secondary winding 7 where a positive voltage is induced when a switching element 8 turns on. A Zener diode 33 is connected to a base of the transistor 32. When the switching element 8 is in an on state, the Zener diode 33 turns on the transistor 32 by a voltage Vson generated in the first terminal of the secondary winding 7, thereby supplying the voltage Vson to the gate of the MOSFET 11.

Abstract: The invention relates to a power supply for X-ray generators which includes at least one inverter, at least one transformer and at least one voltage cascade for generating a supply voltage for an X-ray tube. In order to increase the output power that can be achieved while ensuring at the same time a comparatively low weight and a small ripple or output capacitance, the voltage cascade is configured in respect of its capacitances and the stray inductance of the transformers in such a manner that it can operate in the resonance mode under appropriate control of the inverter. For said features it is particularly beneficial to use a two-phase or three-phase configuration which can be integrated with an X-ray system so as to form a compact tank generator.

Abstract: The system includes a plurality of voltage transformers in a protective relay for A, B and C-phase power system voltages, responsive to the secondary windings of corresponding voltage transformers for the power system, the secondary windings of the voltage system power transformers being connected in a broken delta arrangement. The primary windings of the relay voltage transformers are arranged in a broken delta configuration and connected to the secondary windings of the power system voltage transformers so that A-phase, B-phase and C-phase voltage are provided at the secondary windings of the relay voltage transformers. The three-phase voltages may then be summed to produce a residual voltage value.

Abstract: The present invention provides a visual messaging device for use with a high-speed network and an electrical supply system for the visual messaging device. The visual messaging device includes a network interface circuit that receives the message data from a network and arranges it in memory unit in usable form (packets) for use by a processor at the high network speed. The electrical supply system utilized with the visual messaging device comprises, in part, a power source, located in a remote location relative to a low voltage, high current device, which provides for the transmission of electrical power to the low voltage, high current device, such as a visual display unit, via relatively thin wiring or cabling passing through an enclosure, such as a plenum air space, without the need of placing the wiring or cabling in a conduit.

Abstract: The present invention provides a control algorithm which instantaneously detects magnetic pole positions in the inside of a motor including polarities of the motor. A controller 1 applies a minute voltage change vhd to a voltage command on a dc axis which constitutes an estimation magnetic pole axis of the motor 3, detects electric currents Idc, Iqc of a motor 3 and discriminates the polarities of the magnetic pole axes by making use of the difference between a cycle in which ripple components of the electric currents Idc, Iqc become positive and a cycle in which the ripple components become negative or the difference between positive-side and negative-side current change rates. Further, the minute voltage change vhd with respect to the above-mentioned voltage command is generated on both of the dc axis and the qc axis rectangular thereto, and the magnetic pole positions of the motor are directly estimated based on the current ripple components on the respective axes.

Abstract: Disclosed is a conventional safety razor having a sounding board disposed immediately behind and approximately coextensive and even with the razor head, the sounding board being in the form of a thin plastic plate extending upwardly from the razor handle, with the plate serving as both a means for scraping hair stubble on human skin, as well as a means for audibly amplifying vibrations induced thereby. This alerts the user to the continued presence of objectionable hair stubble so that the shaving process is repeated with or without a change of safety razors or razor blades as required. Alternatively, a miniature solid-state microphone may be mounted on the safety razor for sensing the vibrations and driving an audio speaker through an amplifier/filter network.