Abstract: An electronic device unit includes a printed board housing body, a printed board, and a front face panel to which the printed board is fixed. The front face panel is provided with hooks each having a tip provided with a recessed part and knobs for disengaging the hooks. The printed board housing body includes engagement parts each provided with a protruding part to fit with the recessed part of each hook. Pinching the knobs for removing the front face panel from the printed board housing body causes the hooks turn in directions such that engagement between the hooks and the engagement parts and fitting between the recessed parts and the protruding parts are released.

Abstract: An electronic device according to the present invention includes a fan motor disposed at the upper side of a ventilation hole in an upper wall part of a casing containing an electronic component. A fluid receiving part for receiving fluid is positioned beneath lowermost points of vanes of the fan motor.

Abstract: A fan attachment structure for attaching a fan to a casing is provided. The casing includes an accommodation portion configured to accommodate the fan, and an engaged portion formed on a side surface of the accommodation portion. The fan includes an engagement portion formed in a housing, and configured to engage with the engaged portion to restrict movement of the fan in a direction from an interior of the accommodation portion to an opening portion, and a rattling suppressing mechanism formed on a surface of the housing facing toward the side surface of the accommodation portion and configured to bias the fan in a direction apart from the side surface of the accommodation portion.

Abstract: An inspection method for a heatsink according to the present disclosure includes a measurement preparation step of placing the heatsink in a place where radiated-heat quantities can be measured by first and second thermal sensors, each of the first and second thermal sensors including a temperature sensor and a heat-concentrating mirror with a heat-receiving surface curved in a concave shape, the first and second thermal sensors being disposed in different places in a state where a heat-receiving line is inclined from a direction in which the fin protrudes by a predetermined angle, a measurement step of acquiring first and second radiated-heat quantities from the first and second thermal sensors, respectively, and a determination step of determining that a coating state of the coating is fine when a total value of the first and second radiated-heat quantities is larger than a predetermined range defined in advance.

Abstract: There is provided a vehicle electric power system comprising: a battery; a first DC-DC converter configured to step down a voltage of electric power; a second DC-DC converter configured to step down the voltage of the electric power; an electric power storage unit configured to accumulate energy of the electric power whose voltage is stepped down to a first voltage by the second DC-DC converter; an electric power receiving unit configured to receive an electric power from an external device, a voltage of the received electric power being less than the first voltage; and a control circuit configured to control the first DC-DC converter and the second DC-DC converter; wherein the control circuit is started with the electric power received by the electric power receiving unit and operated with electric power, whose voltage is a second voltage less than the first voltage.

Abstract: A cooling structure for an electronic device is configured to include internal heat dissipating fins (first heat dissipating member) accommodated inside a casing together with being disposed on a printed circuit board serving as a circuit substrate, and external heat dissipating fins (second heat dissipating member), a portion of which is exposed externally of the casing. The external heat dissipating fins include a heat input blade member which is fitted into a first heat dissipating blade member that constitutes the internal heat dissipating fins, and a second heat dissipating blade member which is exposed externally of the casing. A heat transfer part adapted to transmit heat from the heat input blade member to the second heat dissipating blade member is interposed between the heat input blade member and the second heat dissipating blade member.

Abstract: A power door opening device comprises a casing; a motor mounted to the casing; a planetary gear unit housed in the casing to reduce rotation speed of the motor; and an output mechanism that transmits reduced rotation from the planetary gear unit to a door to open and close the door. The planetary gear unit comprises a sun gear that rotates with a rotary shaft of the motor; a planetary carrier fixed in the casing; a planetary gear that is rotatably supported to the planetary carrier and meshes with the sun gear; and a ring gear that is rotatably supported in the casing and meshes with the planetary gear. Both ends of the sun gear are supported.

Abstract: Elongated top panel heat dissipation slits each include a first long side sidewall that extends in a depth direction of a first long side, and a second long side sidewall that extends in the depth direction of a second long side. For example, the second long side sidewall is provided with projection portions that protrude toward the first long side sidewall. Then, step portions are formed. The step portions incline to a lower side as the step portions are away from printed circuit boards. An inclined rib inclining to a lower side in an extension direction of a casing locates near lower end portions of the step portions.

Abstract: A power door opening device comprises a casing; a motor mounted to the casing; a planetary gear unit housed in the casing to reduce rotation speed of the motor; and an output mechanism that transmits reduced rotation from the planetary gear unit to a door to open and close the door. The planetary gear unit comprises a sun gear that rotates with a rotary shaft of the motor; a planetary carrier fixed in the casing; a planetary gear that is rotatably supported to the planetary carrier and meshes with the sun gear; and a ring gear that is rotatably supported in the casing and meshes with the planetary gear. Both ends of the sun gear are supported.

Abstract: Phase differences between primary-side series-connected first and second arms and secondary-side series-connected fifth and sixth arms and between primary-side series-connected third and fourth arms and secondary-side series-connected seventh and eighth arms are controlled for power being transmitted from the secondary side to the primary side. Turn-off of the fifth arm is corrected to cause an integrating result of a secondary coil current for an interval delayed by a current sensor response delay from an interval between turn-off of the first arm and turn-on of the seventh arm to approach zero, or turn-off of the seventh arm is corrected to cause an integrating result of the secondary coil current for an interval delayed by the response delay from an interval between turn-off of the third arm and turn-on of the fifth arm to approach zero.

Abstract: In an electrical shield structure of an electronic device unit and a control panel housing, a metal frame includes a plurality of protrusions having conductivity and having heights to come into contact with the control panel housing. The plurality of protrusions are provided at positions which surround an electronic component. A packing includes a plurality of holes through which the protrusions are inserted at positions corresponding to the positions of the protrusions.

Abstract: An electronic device according to the present invention includes a fan motor disposed at the upper side of a ventilation hole in an upper wall part of a casing containing an electronic component. A fluid receiving part for receiving fluid is positioned beneath lowermost points of vanes of the fan motor.

Abstract: In a front sheet fixing structure configured to attach a front sheet to a housing having an opening for a display device or control panel, the front sheet is attached to an inner bottom surface of the housing so as to close the opening of the housing by means of a front metal plate having an opening corresponding to the opening of the housing and having a thermal expansion coefficient substantially equal to that of the front sheet.

Abstract: There is provided a electric power conversion method of an electric power conversion apparatus comprising: charging the capacitor by transmitting the electric power from the primary circuit to the secondary circuit; and determining whether a voltage across the capacitor is equal to or greater than a predetermined value; the electric power conversion method further comprising, upon determining that the voltage across the capacitor is greater than or equal to the predetermined value, stopping to drive the primary circuit; driving the first secondary upper arm or the second secondary upper arm; and detecting whether a short-circuiting failure occurs in the first secondary lower arm or in the second secondary lower arm based on a presence or absence of change in a voltage at the secondary port in response to driving the first secondary upper arm or the second secondary upper arm.

Abstract: A door opening/closing device includes: a motor; and an output shaft arranged on a line extending from an axial center of the motor, power of the motor being transmitted to the output shaft via a deceleration mechanism, the door opening/closing device opening and closing a door via the output shaft by driving the motor. Positional deviation on both end surfaces of the output shaft is set to equal to or higher than ?0.01 and equal to or lower than ?0.1.

Abstract: A housing for a module in which a printed circuit board is housed and a housing for a base unit in which a printed circuit board is housed are each provided with an opening for a connector, and a convex portion and/or a concave portion is provided around the connector opening so that a cutting fluid is prevented from dripping and spreading on the connector that electrically connects units such as the module and the base unit.

Abstract: A full-bridge circuit has serial first arms and serial second arms. Another full-bridge circuit has serial third arms and serial fourth arms. Primary and secondary coils of a transformer are included, respectively, in a part connecting a middle point of the first arms and a middle point of the second arms and a part connecting a middle point of the third arms and a middle point of the fourth arms. A switching phase difference between the first arms and the third arms and a switching phase difference between the second arms and the fourth arms are adjusted, and transmission power between these full-bridge circuits is controlled. Connections of respective electrodes of a power source are inversely connected to respective polarity buses of the other full-bridge circuit. A phase of switching in one of the third and fourth arms other one having a short-circuit failure is inverted.

Abstract: An electronic device unit includes a printed board housing body, a printed board, and a front face panel to which the printed board is fixed. The front face panel is provided with hooks each having a tip provided with a recessed part and knobs for disengaging the hooks. The printed board housing body includes engagement parts each provided with a protruding part to fit with the recessed part of each hook. Pinching the knobs for removing the front face panel from the printed board housing body causes the hooks turn in directions such that engagement between the hooks and the engagement parts and fitting between the recessed parts and the protruding parts are released.

Abstract: Phase differences between primary-side series-connected first and second arms and secondary-side series-connected fifth and sixth arms and between primary-side series-connected third and fourth arms and secondary-side series-connected seventh and eighth arms are controlled for power being transmitted from the secondary side to the primary side. Turn-off of the fifth arm is corrected to cause an integrating result of a secondary coil current for an interval delayed by a current sensor response delay from an interval between turn-off of the first arm and turn-on of the seventh arm to approach zero, or turn-off of the seventh arm is corrected to cause an integrating result of the secondary coil current for an interval delayed by the response delay from an interval between turn-off of the third arm and turn-on of the fifth arm to approach zero.

Abstract: There is provided a electric power conversion method of an electric power conversion apparatus comprising: charging the capacitor by transmitting the electric power from the primary circuit to the secondary circuit; and determining whether a voltage across the capacitor is equal to or greater than a predetermined value; the electric power conversion method further comprising, upon determining that the voltage across the capacitor is greater than or equal to the predetermined value, stopping to drive the primary circuit; driving the first secondary upper arm or the second secondary upper arm; and detecting whether a short-circuiting failure occurs in the first secondary lower arm or in the second secondary lower arm based on a presence or absence of change in a voltage at the secondary port in response to driving the first secondary upper arm or the second secondary upper arm.