摘要:
The present invention provides an alternator having a small size and a high reliability wherein, the alternator is equipped with a switching power module 1 having a resin case 13 housing switching elements 2 and a driving circuit section 5, a smoothing capacitor 7 for smoothing a direct current output supplied to the switching elements 2, a control circuit section 6 for outputting a control signal to the driving circuit section 5 and a cooling member 24; a ceramic capacitor is used as the smoothing capacitor; a smoothing capacitor board 25 for mounting the smoothing capacitor 7 is disposed between an insulating board mounting with the switching elements 2 and a driving circuit board 18 mounting with the driving circuit section 5; and the smoothing capacitor board 25 functions also as an electromagnetic shielding plate for protecting the driving circuit section 5 against the switching noise of the switching elements.
摘要:
A small-sized highly reliable power inverter comprises switching elements for inverting power by switching, a drive circuit unit for driving the switching elements, smoothing capacitors for smoothing the output of a DC power source to be supplied to the switching elements, an insulated substrate for mounting the switching elements, a drive circuit board for mounting the drive circuit, and a smoothing capacitor substrate for mounting the smoothing capacitors between the insulated substrate and the drive circuit board, wherein ceramic capacitors are used as the smoothing capacitors and the smoothing capacitor substrate serves as an electromagnetic shielding plate.
摘要:
An electric power conversion assembly includes switching elements for converting electric power by switching, a drive circuit portion for driving the switching elements, a smoothing capacitor for suppressing fluctuations in the voltage from a direct-current power supply supplying the switching elements, and a control circuit portion for controlling the switching elements by outputting a control signal to the drive circuit portion, the smoothing capacitor including ceramic capacitors.
摘要:
The invention provides a reactor to be built in a power converter. In the reactor, an induction component composed of a coil being a winding of a conductor wire, a core in which interior a magnetic path is formed and an insulation bobbin positioning and engaging a wire wound part of the coil is housed in a case to be soaked with a mold resin. Inner bottom face of the case has a plurality of surfaces having not less than two different heights letting the outside bottom of the case a reference surface, and the lower end face of the core is in contact with any of the case inner bottom surfaces excluding the lowest inner bottom surface. As a result, the reactor is suitable for on-vehicle applications to achieve reduced article variation as well as a longer service life, a shorter operation time and decreased cost.
摘要:
A power conversion apparatus comprising a switching power module (1) for conducting power conversion in a switching manner, a plurality of smoothing capacitors (6A) for smoothing a direct-current power supply output to be applied to the switching power module (1), and a switching power module connecting wiring board (19) for establishing connection of the smoothing capacitor (6A) to the switching power module (1). A ceramic capacitor is used as the smoothing capacitors (6A). The smoothing capacitors (6A), a smoothing capacitor case (23) accommodating the ceramic capacitors and the switching power module connection wiring board (19) are integrated structurally with each other to construct a smoothing capacitor assembly (24). This smoothing capacitor assembly (24) is connected to the switching power module (1).
摘要:
Disclosed is a DC-DC power conversion apparatus (10) including two or more switching units (SU1, SU2) each of which further includes two semiconductor switching elements (Sa, Sb), and wherein each of the semiconductor switching elements (S1a, S1b, S2a, S2b) of each of the switching units are all connected in series, and which also includes an energy transition capacitor (C1) for conducting charging/discharging, and an inductor (L). The DC-DC power conversion apparatus (10) is also provided with a control unit that makes the semiconductor elements execute operations in four types of switching modes, according to the ratio (V2/V0) of the input/output voltages of the power conversion apparatus and the direction of the power transmission, and that also makes the elements carry out a current-discontinuing operation wherein the inductor current will become zero during switching operation, upon low load.
摘要:
A power conversion apparatus comprising a base 110 which includes a first fixation portion 110a and a second fixation portion 110b that are coupled to each other at a desired angle, wherein power modules IPM1, IPM2 and IPM3 are fixed on the first fixation portion 110a of the base 110, a control circuit board 10 is fixed with its first principal surface 10a held in direct or indirect touch with the second fixation portion 110b of the base 110, and components constituting a control circuit are packaged on the second principal surface 10b of the control circuit board 10. Owing to the configuration, a versatility for the installation of the power conversion apparatus on a vehicle becomes high, the vibration-proofness of the control circuit board is enhanced, and heats generated by the electronic components, etc. packaged on the control circuit board are sufficiently emitted.
摘要:
A power supply apparatus includes: an AC generator including an AC generating section, and a rectifier for rectifying an AC voltage generated in the AC generating section, and outputting a DC voltage; and a DC/DC converter for converting the output voltage of the rectifier into a DC voltage having a different voltage value, wherein the output voltage of the rectifier is set to be larger than the output voltage of the DC/DC converter in accordance with the rotation speed of the AC generating section and the amount of power supply to an electrical load connected to the DC/DC converter, and is stepped down and outputted by using the DC/DC converter. The power supply apparatus is capable of increasing an output power efficiently.
摘要:
A power conversion apparatus comprising a base 110 which includes a first fixation portion 110a and a second fixation portion 110b that are coupled to each other at a desired angle, wherein power modules IPM1, IPM2 and IPM3 are fixed on the first fixation portion 110a of the base 110, a control circuit board 10 is fixed with its first principal surface 10a held in direct or indirect touch with the second fixation portion 110b of the base 110, and components constituting a control circuit are packaged on the second principal surface 10b of the control circuit board 10. Owing to the configuration, a versatility for the installation of the power conversion apparatus on a vehicle becomes high, the vibration-proofness of the control circuit board is enhanced, and heats generated by the electronic components, etc. packaged on the control circuit board are sufficiently emitted.
摘要:
There is provided a high performance onboard semiconductor device with low manufacturing costs and low repair costs. The onboard semiconductor device includes a power chip substrate on which a power chip is mounted, a control substrate provided with an electrical part in relation to the power chip, and an outer enclosing case in which the power chip substrate and the control substrate are contained, and is characterized in that the control substrate and the outer enclosing case are removably fixed to each other.