Abstract: A power inverter comprises at least a box-shaped housing; and a power module, a smoothing capacitor, a base plate made of a flat plate, and a rotating electric machine control circuit board arranged in order in the housing. The base plate is arranged with the fringes fixed to the inner wall surfaces of the housing, and the smoothing capacitor and rotating electric machine control circuit board are fixed.

Abstract: To provide a power converter equipped with a current detector which is small and can carry out highly accurate current detection, in the power converter equipped with a power module 16 having a power controlling semiconductor element 7 disposed on the power module base 27 with a ceramic substrate 28 interposed, and a control unit 26 for controlling the operation of the power controlling semiconductor element 7, a current detector 40 having a magnetic detecting unit 47 which is disposed in the detection conductor 11, electrically connected to the power controlling semiconductor element 7 and disposed on the power module base 27 with the ceramic substrate 28 interposed, and has a magnetic detecting semiconductor element 43 electrically connected to the control unit 26 is provided in the power module 16; and relative distance between the detection conductor 11 and the power module base 27 is larger than the relative distance between the current detection electrode 42 and the power module base 27.

Abstract: A cooling system for a motor is prevented from exhibiting a thermal fatigue failure due to a temperature cycle. The operation or stopping of the cooling motor fan 6 of the forced cooling system is controlled using the difference between the temperature thereof and the operation start temperature Tis of the power converter 3. Thus expansion of the temperature range is suppressed.

Abstract: A cooling system for a motor is prevented from a thermal fatigue failure due to the temperature cycle. The operation or stop of the forced cooling motor fan 6 of the forcible cooling system is controlled using the difference between the temperature thereof and the operation start temperature Tis of the power converter 3, thus expansion of the temperature range is suppressed.

Abstract: A connecting structure for a shielded cable having a braid is disclosed. The connecting structure includes a cable insertion hole, a hollow pressure member, a shield connection member, and a hollow bolt. The cable insertion hole includes a female threaded part and a shield connection part having an inclined surface. The hollow pressure member is inserted into the shield connection part of the cable insertion hole and the shielded cable passes through the hollow pressure member. The shield connection member is connected to the braid of the shielded cable and has an inclined part. The shield connection member is inserted into the cable insertion hole such that the inclined part is disposed between the inclined surface of the shield connection part and the hollow pressure member. The shielded cable passes through the hollow bolt and the hollow bolt is threaded into the female threaded part of the cable insertion hole.