Patent application number | Description | Published |
20110231042 | VEHICLE POWER SYSTEM - A vehicle power system is provided with a switching power supply that generates an operation power for operating a plurality of ECU by stepping down a power supply supplied from at least one of a generator and a battery, and a power distributor that distributes and supplies the operation power generated by the switching power supply to the individual ECUs. | 09-22-2011 |
20110291236 | SEMICONDUCTOR MODULE WITH ELECTRICAL SWITCHING ELEMENTS - A semiconductor module is provided which is capable of lowering surges caused when switching elements are switched on and off. The module has a plurality of lead frames, switching elements, electronic components, and a sealing member. The switching elements are electrically connected to the lead fames respectively. Part of the lead frames, the switching elements, and the electronic components are sealed by the sealing member. The electronic components are mounted on primary surfaces of the lead frames respectively. | 12-01-2011 |
20120249279 | TRANSFORMER - A transformer includes a pair of first coils and at least one second coil. The first and second coils are stacked so that the at least one second coil is interposed between the first coils in a common winding axial direction of the first and second coils. Each of the first coils is covered by insulating films and integrated with the insulating films into an integrated body, so that the first coils are electrically insulated from the at least one second coil. | 10-04-2012 |
20130063983 | POWER CONVERTER ENABLING SUPPRESSION OF MAGNETIC FLUX BIAS IN A TRANSFORMER OF THE CONVERTER - In an electrical power converter, an input circuit performs switching for converting a supply voltage of a power source to alternating-polarity voltage pulses which are applied to the primary winding of a transformer. Each voltage pulse is controlled (e.g., pulse width or amplitude is adjusted) based on a detected value of current flow in the primary winding, where the value has been detected an even-numbered plurality of voltage pulses previously. Any DC component of current flow in the primary winding, caused by manufacturing deviations between switching elements in the input circuit, can thereby be suppressed, and DC flux bias in the transformer thereby suppressed. | 03-14-2013 |
20130076330 | POWER CONVERTER - A power converter includes a control circuit provided with a set signal generator, a current command generator, a reset signal generator, a drive signal generator, and a pulse-width limiter. The set signal generator generates a set signal at every predetermined cycle. The current command generator generates a current command based on an output voltage command and an output voltage. The reset signal generator generates a reset signal based on an input current and the generated current command. The drive signal generator generates a drive signal which turns on in synchronisation with the generated set signal to turn on a switching element and which turns off in synchronization with the subsequently generated reset signal to turn off the switching element. The pulse-width limiter limits a pulse-width of the drive signal according to an input voltage and the output voltage, or according to the input voltage and the output voltage command. | 03-28-2013 |
20130300397 | POWER CONVERTER - In a power converter, a reference signal generator generates a reference signal with a predetermined period. A current detector detects a current flowing in the converter. When a value of the detected current is larger than a value of a predetermined current command, a reset signal generator generates a reset signal. A driving unit drives a switch. The switch is turned on, and subsequently is turned off: (i) in synchronization with the reference signal when the reset signal is not outputted before the reference signal is outputted; and (ii) in synchronization with the reset signal when the reset signal is outputted before the reference signal is outputted. However, the switch is turned off in synchronization with the reset signal during a predetermined time including a first predetermined time before an output timing of the reference signal and a second predetermined time after the output timing of the reference signal. | 11-14-2013 |
20140009971 | ELECTRIC POWER CONVERTER - An electric power converter has a switching circuit section, a transformer, a rectifier, and a noise filtering element. The rectifier is connected to a secondary coil of the transformer. A closed circuit where the noise current flows is formed by the secondary coil, the rectifier, and the noise filtering element. The transformer and the noise filtering element are disposed in a position next to each other. The secondary coil and the noise filtering element are electrically connected to each other through a terminal for a coil that is a terminal of the secondary coil and a terminal for a filter that is a terminal of the noise filtering element. The terminal for the coil and the terminal for the filter are disposed in a position between the transformer and the noise filtering element. | 01-09-2014 |
20140062558 | CURRENT MODE CONTROLLED POWER CONVERTER - A current mode controlled power converter controllable in a digitally processing current mode even during an on time. In the power converter, each control period based on a reference signal includes a slope calculation period in which a slope compensation signal for the control period is calculated by a slope compensation unit. During each slope calculation period, the slope compensation unit negates the slope compensation signal calculated previous to the control period including the slope calculation period, and a reset signal generation unit compares a current detection signal detected by a current detection unit with a current instruction set to an error signal generated by an error signal generation unit to generate a reset signal. | 03-06-2014 |
20140198537 | POWER CONVERSION APPARATUS - A power conversion apparatus includes a switch circuit which activates switching elements on the basis of a control signal, a feedback means which performs feedback control, a signal output means which outputs the control signal on the basis of a control variable of the feedback control, and a mode switching means which controls switching operation of the switch circuit by switching an operation mode between a normal mode and an intermittent mode in which the number of operations is less than that in the normal mode. The mode switching means changes timing of switching from the normal mode to the intermittent mode, on the basis of either or both of a first detection value which is an input value inputted to the switch circuit and a second detection value which is an output value outputted from the switch circuit. | 07-17-2014 |
20140198538 | POWER CONVERTER WITH CURRENT FEEDBACK LOOP - In a power converter, a driver drives a switching element using a manipulated variable therefor to convert input power into output power. A first measuring unit measures a value of a first electric parameter depending on the input power. A first determiner determines, from the measured value of the first electric parameter, a first feedback controlled variable. A second measuring unit measures a value of a second electric parameter indicative of the output power, and a calculator calculates, based on the measured value of the second electric parameter and a command value for the second electric parameter, a second feedback controlled variable. A selector selects, based on the measured value of the first electric parameter, one of the first feedback controlled variable and the second feedback controlled variable. A second determiner determines the manipulated variable using the selected one of the first and second feedback controlled variables. | 07-17-2014 |
20140204617 | POWER CONVERTER WITH CURRENT FEEDBACK LOOP - In a power converter, a deviation calculator calculates, in each cycle, a deviation between a value of an input electrical parameter of a switch circuit and a target value selected by a selector in a previous cycle. The input electrical parameter depends on the input power to the switch circuit. A second calculator calculates, in each cycle, a value of a second feedback controlled variable such that the value of the second feedback variable approaches the value of the input electrical parameter. A controller controls, in each cycle, the selector to select one of the value of the first feedback controlled variable and the value of the second feedback controlled variable as the target value for the next cycle according to the deviation calculated by the deviation calculator. | 07-24-2014 |
20140347767 | POWER CONVERTER WITH SWITCHING ELEMENT - In a power converter, a driver that drives, according to a control signal, a switching element of a switch circuit for converting input power to output power. The control signal represents how to drive the switching element. A controller outputs the control signal to the driver for controlling the driver. A measuring unit measures a value of input power input to the switch circuit. A protection determining unit determines, based on the measured value of the input power, whether there is a need to protect the power converter. The protection determining unit outputs a stop control signal to at least one of the driver and the controller based on a result of the determination of whether there is a need to protect the power converter. The stop control signal represents whether to forcibly stop drive of the switching element. | 11-27-2014 |