摘要:
In order to provide an interface circuit, a power converter using the same and an electric vehicle using the same, wherein this interface circuit ensures improved control reliability without employing a photo-coupler, an interface circuit 100A transfers control signals to the power transistor in a large-current circuit 300 from a small-signal circuit 200 for driving a power transistor. The interface circuit 100A has a noise absorber 120 that electrically absorbs a noise voltage produced between the ground of the small-signal circuit 200 and that of the power transistor. The noise absorber 120 transfers to the power transistor the control signals generated by the small-signal circuit 200, without being affected by the noise voltage if produced.
摘要:
In order to solve the issue mentioned above, the present invention is featured in electrically conductive adhesive sheet: wherein the substrate 1 which composes electrically, thermally, or electrically and thermally conducting paths in a direction along the plane of the sheet is formed of metallic foil having a coefficient of thermal expansion between the coefficient of thermal expansion of one of at least two bonded members and the coefficient of thermal expansion of another one of the bonded members. In accordance with the present invention adopting the composition mentioned above, a stress applied to the protrusion layer 2, which composes electrically, thermally, or both electrically and thermally conducting paths between the substrate 1 and the bonded members by difference in thermal expansion, can be moderated.
摘要:
There is provided a power conversion apparatus which allows a noise current or voltage to be suppressed at a low cost and in a small size, the noise current or voltage mixing into the power conversion apparatus by propagating through a control wiring connected to an external appliance.The power conversion apparatus includes a housing, connection terminals provided on the housing, a control-circuit unit provided inside the housing, a wiring for establishing the connection between the connection terminals and the control-circuit unit, a first noise-removing unit connected between the wiring and the ground potential of the housing, and a second noise-removing unit connected between the wiring and the ground potential of the housing, and also in parallel to the first noise-removing unit.
摘要:
A battery system includes: a battery unit formed by electrically connected in series a plurality of cell groups each made up with a plurality of battery cells electrically connected in series; a plurality of sensing lines for detecting voltages of respective battery cells in the battery unit; an integrated circuit provided to each of the cell group, to which the sensing lines for detecting voltages of respective battery cells in the cell group are connected; a case having housed therein a substrate at which a plurality of integrated circuits provided for the cell groups respectively are mounted; noise protection capacitors disposed between input terminals of the plurality of sensing lines; and at least one protection element against static electricity which is connected between the input terminals and the case.
摘要:
An interface circuit capable of reliably transmitting signal even when there is fluctuation in the potential difference in reference potentials between circuits between which signal transmission is carried out. An interface circuit 4 is comprised of a level shift circuit 20 and a potential selection circuit 10 for selecting the potential of a power supply voltage for operating the level shift circuit 20. The potential selection circuit 10 selects one of a plurality of input potentials. The level shift circuit 20 receives a voltage pulse having a first potential as reference potential and outputs a voltage pulse having a second potential as reference potential. The level shift circuit 20 is operated on the basis of both a potential difference between the output potential from the potential selection circuit and the first potential and a potential difference between the selected potential and the second potential.
摘要:
A power conversion device includes: an inverter that converts a DC current supplied from a DC power source to an AC current by engaging a plurality of switching elements, which constitute an upper arm, and a plurality of switching elements, which constitute a lower arm, in switching operation; a control unit that includes a signal generation unit that generates a switching signal carrying a command for execution of the switching operation in correspondence to each of the plurality of switching elements constituting the upper arm and the plurality of switching elements constituting the lower arm, and outputs the switching signal thus generated as a control signal; and a drive unit that individually drives each of the switching elements based upon the corresponding control signals. The control unit includes a plurality of protection circuits disposed in series on a control signal line extending between the signal generation unit and the drive unit, with each of the protection circuits outputting a control signal having been input thereto when a protective operation is not executed but outputting a control signal for setting the corresponding switching element either in a cut-off state or in an electrically continuous state in place of the control signal input thereto when the protective operation is executed.
摘要:
An electrical power conversion device includes: a switching element in which a principal electrical current flows in a direction from a second electrode towards a first electrode based upon a voltage being applied to a control electrode; a voltage control circuit that controls the voltage that is applied to the control electrode; and a continuity control circuit that is connected between the second electrode and the control electrode and controls continuity between the second electrode and the control electrode.
摘要:
An interface circuit capable of reliably transmitting signal even when there is fluctuation in the potential difference in reference potentials between circuits between which signal transmission is carried out. An interface circuit 4 is comprised of a level shift circuit 20 and a potential selection circuit 10 for selecting the potential of a power supply voltage for operating the level shift circuit 20. The potential selection circuit 10 selects one of a plurality of input potentials. The level shift circuit 20 receives a voltage pulse having a first potential as reference potential and outputs a voltage pulse having a second potential as reference potential. The level shift circuit 20 is operated on the basis of both a potential difference between the output potential from the potential selection circuit and the first potential and a potential difference between the selected potential and the second potential.
摘要:
A power converter includes an inverter unit that includes a plurality of semiconductor switching elements constituting upper and lower arms and converts DC power into AC power; a gate driving unit that outputs, to the inverter unit, a gate signal used to drive gates of the plurality of semiconductor switching elements; a driving control unit that supplies the gate driving unit with a switching control signal used for the gate driving unit to output the gate signal; a first abnormality detection unit that performs over voltage detection of the DC power and over current detection of the AC power and temperature detection of the upper and lower arms; and a second abnormality detection unit that detects abnormality of the plurality of semiconductor switching elements of the upper arm and lower arms, wherein the driving control unit includes a first protection circuit and a second protection circuit.
摘要:
A power conversion device includes: an inverter that converts a DC current supplied from a DC power source to an AC current by engaging a plurality of switching elements, which constitute an upper arm, and a plurality of switching elements, which constitute a lower arm, in switching operation; a control unit that includes a signal generation unit that generates a switching signal carrying a command for execution of the switching operation in correspondence to each of the plurality of switching elements constituting the upper arm and the plurality of switching elements constituting the lower arm, and outputs the switching signal thus generated as a control signal; and a drive unit that individually drives each of the switching elements based upon the corresponding control signals. The control unit includes a plurality of protection circuits disposed in series on a control signal line extending between the signal generation unit and the drive unit, with each of the protection circuits outputting a control signal having been input thereto when a protective operation is not executed but outputting a control signal for setting the corresponding switching element either in a cut-off state or in an electrically continuous state in place of the control signal input thereto when the protective operation is executed.