Power converter
There is provided a power converter which can suppress a surge voltage and reduce noise flowing from an input of a power changer. The power converter includes an inverter circuit 140 , a capacitor 514 for smoothing DC power, a capacitor 515 for removing noise, and conductors 564 p and 564 n . The conductors 564 p and 564 n are connected to the capacitors 514 and 515 when power side terminals 562 p and 562 n are connected to an inverter circuit 140 , and power source side terminals 561 p and 561 n are connected to a battery 136 . In the conductors 564 p and 564 n , a parasitic inductance L 1 between capacitor terminals 563 p and 563 n and capacitor terminals 560 p and 560 n is larger than a parasitic inductance L 2 between capacitor terminals 563 p and 563 n and the power side terminals 562 p and 562 n.
1. A power converter comprising:
a power conversion circuit including a plurality of semiconductor switching elements;
a smoothing capacitor configured to smooth DC power from a DC power source; and
a conductor configured to conduct the DC power from the DC power source to the power conversion circuit, wherein
the conductor includes:
a power source side terminal configured to be connected to the DC power source;
a power side terminal connected to the power conversion circuit; and
a first capacitor terminal connected to the smoothing capacitor and formed at a position so that a first parasitic inductance between the first capacitor terminal and the power source side terminal is larger than a second parasitic inductance between the first capacitor terminal and the power side terminal.
2. The power converter according to claim 1 , wherein
the conductor has a first portion with a first width between the first capacitor terminal and the power side terminal, and
the conductor has a second portion with a second width narrower than the first width between the first capacitor terminal and the power source side terminal.
3. The power converter according to claim 1 , further comprising:
a Y-capacitor connected to a ground,
wherein the conductor includes a second capacitor terminal connected to the Y-capacitor and formed between the first capacitor terminal and the power source side terminal.
4. The power converter according to claim 3 , wherein
a third parasitic inductance between the first capacitor terminal and the second capacitor terminal is larger than the second parasitic inductance.
5. The power converter according to claim 3 , wherein
the conductor has a first portion with a first width between the first capacitor terminal and the power side terminal, and
the conductor has a second portion with a second width narrower than the first width between the first capacitor terminal and the second capacitor terminal.
6. A power converter comprising:
a power conversion circuit including a plurality of semiconductor switching elements;
a smoothing capacitor connected in parallel with the power conversion circuit; and
a conductor configured to conduct the DC power from a DC power source to the power conversion circuit, wherein
the conductor includes:
a power source side terminal configured to be connected to the DC power source;
a power side terminal connected to the power conversion circuit; and
a first capacitor terminal connected to the smoothing capacitor and formed at a position so that a first parasitic inductance between the first capacitor terminal and the power source side terminal is larger than a second parasitic inductance between the first capacitor terminal and the power side terminal,
wherein the conductor has a laminated portion between the first capacitor terminal and the power side terminal, and
wherein the conductor has a non-laminated portion between the first capacitor terminal and the power source side terminal.
7. The power converter of claim 1 , wherein:
the conductor has a first portion with a first length between the first capacitor terminal and the power side terminal, and
the conductor has a second portion with a second length between the first capacitor terminal and the power source side terminal, wherein the second length is shorter than the first length.
8. The power converter of claim 1 , wherein:
the conductor comprises a positive line and a negative line;
the smoothing capacitor is connected in parallel with the DC power source; and
the smoothing capacitor is connected so that it is the closest capacitor connected in parallel to the DC power source that has a connection terminal on the positive line and a connection terminal on the negative line.