Power converter
View Patent ↗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 first capacitor configured to smooth DC power input to the power conversion circuit;
a second capacitor configured to release common mode noise to a ground; and
a conductor that electrically connects the power conversion circuit, the first capacitor, and the second capacitor,
wherein the conductor includes a first connecting portion connected to the first capacitor, a second connecting portion connected to the second capacitor, and a third connecting portion connected to the power conversion circuit, and
the conductor is formed such that a wiring distance between the first connecting portion and the second connecting portion is longer than a wiring distance between the first connecting portion and the third connecting portion.
2. The power converter according to claim 1 ,
wherein the conductor has a laminated structure, in which a positive electrode conductor member and a negative electrode conductor member are laminated via an insulating member between the third connecting portion and the first connecting portion, and
the conductor has a non-laminated structure in which the positive electrode conductor member and the negative electrode conductor member are not laminated at least at a part of between the first connecting portion and the second connecting portion.
3. The power converter according to claim 1 ,
wherein the first capacitor has a substantially rectangular parallelepiped shape having six side surfaces,
the conductor is extended along a plurality of the side surfaces, and
a length of the laminated structure portion is shorter than a length of the non-laminated structure portion in a length along the plurality of side surfaces of the conductor.
4. The power converter according to claim 1 ,
wherein, in the conductor, a conductor cross-sectional area between the first connecting portion and the second connecting portion is smaller than a conductor cross-sectional area between the third connecting portion and the first connecting portion.
5. A power converter comprising:
a power conversion circuit including a plurality of semiconductor switching elements;
a first capacitor configured to smooth DC power input to the power conversion circuit;
a second capacitor configured to release common mode noise to a ground; and
a conductor that electrically connects the power conversion circuit, the first capacitor, and the second capacitor,
wherein the conductor includes a first connecting portion connected to the first capacitor, a second connecting portion connected to the second capacitor, and a third connecting portion connected to the power conversion circuit, and
a first length of the conductor from the first connecting portion to the second connecting portion is longer than a second length of the conductor from the first connecting portion to the third connecting portion.
6. The power converter according to claim 5 ,
wherein the conductor has a laminated structure, in which a positive electrode conductor member and a negative electrode conductor member are laminated via an insulating member between the third connecting portion and the first connecting portion, and
the conductor has a non-laminated structure in which the positive electrode conductor member and the negative electrode conductor member are not laminated at least at a part of between the first connecting portion and the second connecting portion.
7. The power converter according to claim 5 ,
wherein the first capacitor has a substantially rectangular parallelepiped shape having six side surfaces,
the conductor is extended along a plurality of the side surfaces, and
a length of the laminated structure portion is shorter than a length of the non-laminated structure portion in a length along the plurality of side surfaces of the conductor.
8. The power converter according to claim 5 ,
wherein, in the conductor, a conductor cross-sectional area between the first connecting portion and the second connecting portion is smaller than a conductor cross-sectional area between the third connecting portion and the first connecting portion.