Power conversion apparatus

A power conversion apparatus comprising:

• an inverter that includes a series connection body of upper- and lower-arm switches, the series connection body being connected in parallel to a series connection body of a first power storage unit and a second power storage unit;
• a rotating electric machine that includes a winding that is electrically connected to the inverter;
• a neutral-point wiring that electrically connects a negative electrode side of the first power storage unit and a positive electrode side of the second power storage unit, and a neutral point of the winding;
• a control unit that performs switching control of the upper- and lower-arm switches such that a current flows between the first power storage unit and the second power storage unit through the inverter, the winding, and the neutral-point wiring;
• a case that houses at least the inverter and the rotating electric machine;
• and
• a motive-power wiring that electrically connects a connection point of the upper- and lower-arm switches and an end portion of the winding on a side opposite the neutral point side, for each phase, wherein:
• the case is formed by a non-metal material;
• the motive-power wiring and at least a portion of the neutral-point wiring are housed inside the case;
• a shield wire that covers the motive-power wiring and the neutral-point wiring is provided inside the case;
• the case includes
• a first case that houses the inverter and
• a second case that is disposed separated from the first case and houses the first power storage unit and the second power storage unit;
• and
• the shield wire covers a battery-side inter-case wiring that is a portion of the neutral-point wiring between a portion of the neutral-point wiring housed in the second case and a portion of the neutral-point wiring housed in the first case, and electrically connects the first case and the second case.

A power conversion apparatus comprising:

• an inverter that includes a series connection body of upper- and lower-arm switches, the series connection body being connected in parallel to a series connection body of a first power storage unit and a second power storage unit;
• a rotating electric machine that includes a winding that is electrically connected to the inverter;
• a neutral-point wiring that electrically connects a negative electrode side of the first power storage unit and a positive electrode side of the second power storage unit, and a neutral point of the winding;
• a control unit that performs switching control of the upper- and lower-arm switches such that a current flows between the first power storage unit and the second power storage unit through the inverter, the winding, and the neutral-point wiring;
• a case that houses at least the inverter and provides a shield function;
• and
• a first capacitor and a second capacitor that are provided inside the case, wherein
• at least a portion of the neutral-point wiring is housed inside the case,
• a high-potential-side terminal side of the upper arm switch and the neutral-point wiring are electrically connected by the first capacitor inside the case, and
• a low-potential-side terminal side of the lower arm switch and the neutral-point wiring are electrically connected by the second capacitor inside the case.

A power conversion apparatus comprising:

• an inverter that includes a series connection body of upper- and lower-arm switches, the series connection body being connected in parallel to a series connection body of a first power storage unit and a second power storage unit;
• a rotating electric machine that includes a winding that is electrically connected to the inverter;
• a neutral-point wiring that electrically connects a negative electrode side of the first power storage unit and a positive electrode side of the second power storage unit, and a neutral point of the winding;
• a control unit that performs switching control of the upper- and lower-arm switches such that a current flows between the first power storage unit and the second power storage unit through the inverter, the winding, and the neutral-point wiring;
• a case that houses at least the inverter and provides a shield function;
• and
• a common mode choke that includes
• a first coil that is provided in a high-potential-side wiring that electrically connects a positive electrode side of the first power storage unit and a high-potential-side terminal of the upper arm switch,
• a second coil that is provided in the neutral-point wiring,
• a third coil that is provided in a low-potential-side wiring that electrically connects a negative electrode side of the second power storage unit and a low-potential-side terminal of the lower arm switch, and
• a common magnetic body core around which the first coil, the second coil, and the third coil are wound, wherein
• at least a portion of the neutral-point wiring is housed inside the case.

A power conversion apparatus comprising:

• an inverter that includes a series connection body of upper- and lower-arm switches, the series connection body being connected in parallel to a series connection body of a first power storage unit and a second power storage unit;
• a rotating electric machine that includes a winding that is electrically connected to the inverter;
• a neutral-point wiring that electrically connects a negative electrode side of the first power storage unit and a positive electrode side of the second power storage unit, and a neutral point of the winding;
• a control unit that performs switching control of the upper- and lower-arm switches such that a current flows between the first power storage unit and the second power storage unit through the inverter, the winding, and the neutral-point wiring;
• a case that houses at least the inverter and the rotating electric machine;
• a motive-power wiring that electrically connects a connection point of the upper- and lower-arm switches and an end portion of the winding on a side opposite the neutral point side, for each phase;
• and
• a first capacitor and a second capacitor that are provided inside the case, wherein
• the case is formed by a non-metal material,
• the motive-power wiring and at least a portion of the neutral-point wiring are housed inside the case,
• a shield wire that covers the motive-power wiring and the neutral-point wiring is provided inside the case,
• a high-potential-side terminal side of the upper arm switch and the neutral-point wiring are electrically connected by the first capacitor inside the case, and
• a low-potential-side terminal side of the lower arm switch and the neutral-point wiring are electrically connected by the second capacitor inside the case.

A power conversion apparatus comprising:

• an inverter that includes a series connection body of upper- and lower-arm switches, the series connection body being connected in parallel to a series connection body of a first power storage unit and a second power storage unit;
• a rotating electric machine that includes a winding that is electrically connected to the inverter;
• a neutral-point wiring that electrically connects a negative electrode side of the first power storage unit and a positive electrode side of the second power storage unit, and a neutral point of the winding;
• a control unit that performs switching control of the upper- and lower-arm switches such that a current flows between the first power storage unit and the second power storage unit through the inverter, the winding, and the neutral-point wiring;
• a case that houses at least the inverter and the rotating electric machine;
• a motive-power wiring that electrically connects a connection point of the upper- and lower-arm switches and an end portion of the winding on a side opposite the neutral point side, for each phase;
• and
• a common mode choke that includes
• a first coil that is provided in a high-potential-side wiring that electrically connects a positive electrode side of the first power storage unit and a high-potential-side terminal of the upper arm switch,
• a second coil that is provided in the neutral-point wiring,
• a third coil that is provided in a low-potential-side wiring that electrically connects a negative electrode side of the second power storage unit and a low-potential-side terminal of the lower arm switch, and
• a common magnetic body core around which the first coil, the second coil, and the third coil are wound, wherein
• the case is formed by a non-metal material,
• the motive-power wiring and at least a portion of the neutral-point wiring are housed inside the case, and
• a shield wire that covers the motive-power wiring and the neutral-point wiring is provided inside the case.