Direct-current power supply, refrigeration cycler, air conditioner, and refrigerator
A direct-current power supply includes: a plurality of semiconductor devices each of which is a multiphase converter incorporating a plurality of semiconductor switching elements and a drive circuit to drive the plurality of semiconductor switching elements; a plurality of first parasitic inductances, each of which connects a reference potential terminal of the drive circuit and output N terminals of the semiconductor switching elements, in the plurality of semiconductor devices; a smoothing capacitor; and an inverter.
1. A direct-current power supply, comprising:
a plurality of semiconductor devices each of which is a multiphase converter incorporating a plurality of semiconductor switching elements and a drive circuit configured to drive the plurality of semiconductor switching elements;
a plurality of first parasitic inductances, each of which connects a reference potential terminal of the drive circuit and an output N terminal of the semiconductor switching elements, in the plurality of semiconductor devices;
a smoothing capacitor;
an inverter; and
a P-side bus configured to connect an anode of the smoothing capacitor and the inverter, wherein
the plurality of the semiconductor devices include respective output P terminals connected to each other through a third jumper line, and
the output P terminal of one of the semiconductor devices is connected to the P-side bus through a fourth jumper line.
2. The direct-current power supply according to claim 1 , wherein
in each of the plurality of semiconductor devices, the reference potential terminal of the drive circuit and the output N terminal of the semiconductor switching elements are connected to each other through a first jumper line, and
each of the first parasitic inductances is generated by the first jumper line.
3. The direct-current power supply according to claim 1 , wherein
at least one of the plurality of semiconductor switching elements is a wide band gap semiconductor.
4. A refrigeration cycler, comprising the direct-current power supply according to claim 1 .
5. An air conditioner, comprising the direct-current power supply according to claim 1 .
6. A refrigerator, comprising the direct-current power supply according to claim 1 .
7. The direct-current power supply according to claim 2 , wherein
at least one of the plurality of semiconductor switching elements is a wide band gap semiconductor.
8. A refrigeration cycler, comprising the direct-current power supply according to claim 2 .
9. A refrigeration cycler, comprising the direct-current power supply according to claim 3 .
10. A refrigeration cycler, comprising the direct-current power supply according to claim 7 .
11. An air conditioner, comprising the direct-current power supply according to claim 2 .
12. An air conditioner, comprising the direct-current power supply according to claim 3 .
13. An air conditioner, comprising the direct-current power supply according to claim 7 .
14. A refrigerator, comprising the direct-current power supply according to claim 2 .
15. A refrigerator, comprising the direct-current power supply according to claim 3 .
16. A refrigerator, comprising the direct-current power supply according to claim 7 .