DC-DC converter, solar charging system, and movable body
This DC/DC converter includes a first DC/DC converter, and a second DC/DC converter for carrying out a DC/DC conversion of voltage supplied from the first DC/DC converter. One of either the first DC/DC converter or the second DC/DC converter is a fixed-factor DC/DC converter, and the other of either the first DC/DC converter or the second DC/DC converter is a variable-factor DC/DC converter.
1. A DC/DC converter, comprising:
a first DC/DC converter, and
a second DC/DC converter for carrying out a DC/DC conversion of voltage supplied from the first DC/DC converter;
wherein one of the first DC/DC converter and the second DC/DC converter is a fixed-factor DC/DC converter, and
the other one of the first DC/DC converter and the second DC/DC converter is a variable-factor DC/DC converter.
2. The DC/DC converter of claim 1 ,
the fixed-factor DC/DC converter being an insulation-type DC/DC converter having a transformer, and
the variable-factor DC/DC converter being a non-insulation-type DC/DC converter.
3. The DC/DC converter of claim 1 ,
the first DC/DC converter being the variable-factor DC/DC converter,
the second DC/DC converter being the fixed-factor DC/DC converter,
the DC/DC converter comprising a load circuit connected to a connection point between the first DC/DC converter and the second DC/DC converter,
the load circuit being a load circuit capable of switching between an operating state and a non-operating state, and
the first DC/DC converter and the second DC/DC converter being DC/DC converters for carrying out a step-down operation.
4. The DC/DC converter of claim 1 ,
the first DC/DC converter and the second DC/DC converter being bidirectional DC/DC converters.
5. The DC/DC converter of claim 4 ,
the variable-factor DC/DC converter carrying out a DC/DC conversion in a direction from the variable-factor DC/DC converter toward the fixed-factor DC/DC converter and gradually stepping up the voltage of the connection point between the fixed-factor DC/DC converter and the variable-factor DC/DC converter,
before the DC/DC converter starts a power transmission operation from the fixed-factor DC/DC converter to the variable-factor DC/DC converter.
6. The DC/DC converter of claim 1 ,
an operating frequency of the first DC/DC converter and an operating frequency of the second DC/DC converter being mutually different.
7. A solar charging system, comprising:
a solar cell;
a first power storage device for storing power outputted from the solar cell;
a second power storage device having a greater voltage than the first power storage device; and
a DC/DC converter for transmitting power between the first power storage device and the second power storage device;
wherein the DC/DC converter comprises:
a first DC/DC converter, and a second DC/DC converter for carrying out a DC/DC conversion of voltage supplied from the first DC/DC converter; and
wherein one of the first DC/DC converter and the second DC/DC converter is a fixed-factor DC/DC converter, and
the other one of the first DC/DC converter and the second DC/DC converter is a variable-factor DC/DC converter.
8. The solar charging system of claim 7 ,
the fixed-factor DC/DC converter being an insulation-type DC/DC converter having a transformer, and
the variable-factor DC/DC converter being a non-insulation-type DC/DC converter.
9. The solar charging system of claim 7 ,
the first DC/DC converter being the variable-factor DC/DC converter,
the second DC/DC converter being the fixed-factor DC/DC converter,
the DC/DC converter comprising a load circuit connected to a connection point between the first DC/DC converter and the second DC/DC converter,
the load circuit being a load circuit capable of switching between an operating state and a non-operating state, and
the first DC/DC converter and the second DC/DC converter being DC/DC converters for carrying out a step-down operation.
10. The solar charging system of claim 7 ,
the first DC/DC converter and the second DC/DC converter being bidirectional DC/DC converters.
11. The solar charging system of claim 10 ,
the variable-factor DC/DC converter carrying out a DC/DC conversion in a direction from the variable-factor DC/DC converter toward the fixed-factor DC/DC converter and gradually stepping up the voltage of the connection point between the fixed-factor DC/DC converter and the variable-factor DC/DC converter,
before the DC/DC converter starts a power transmission operation from the fixed-factor DC/DC converter to the variable-factor DC/DC converter.
12. The solar charging system of claim 7 ,
an operating frequency of the first DC/DC converter and an operating frequency of the second DC/DC converter being mutually different.
13. A movable body, comprising:
a solar charging system;
wherein the solar charging system comprises:
a solar cell;
a first power storage device for storing power outputted from the solar cell;
a second power storage device having a greater voltage than the first power storage device; and
a DC/DC converter for transmitting power between the first power storage device and the second power storage device;
wherein the DC/DC converter comprises:
a first DC/DC converter, and a second DC/DC converter for carrying out a DC/DC conversion of voltage supplied from the first DC/DC converter; and
wherein one of the first DC/DC converter and the second DC/DC converter is a fixed-factor DC/DC converter, and
the other one of the first DC/DC converter and the second DC/DC converter is a variable-factor DC/DC converter.
14. The movable body of claim 13 ,
the fixed-factor DC/DC converter being an insulation-type DC/DC converter having a transformer, and
the variable-factor DC/DC converter being a non-insulation-type DC/DC converter.
15. The movable body of claim 13 ,
the first DC/DC converter being the variable-factor DC/DC converter,
the second DC/DC converter being the fixed-factor DC/DC converter,
the DC/DC converter comprising a load circuit connected to a connection point between the first DC/DC converter and the second DC/DC converter,
the load circuit being a load circuit capable of switching between an operating state and a non-operating state, and
the first DC/DC converter and the second DC/DC converter being DC/DC converters for carrying out a step-down operation.
16. The movable body of claim 13 ,
the first DC/DC converter and the second DC/DC converter being bidirectional DC/DC converters.
17. The movable body of claim 16 ,
the variable-factor DC/DC converter carrying out a DC/DC conversion in a direction from the variable-factor DC/DC converter toward the fixed-factor DC/DC converter and gradually stepping up the voltage of the connection point between the fixed-factor DC/DC converter and the variable-factor DC/DC converter,
before the DC/DC converter starts a power transmission operation from the fixed-factor DC/DC converter to the variable-factor DC/DC converter.
18. The movable body of claim 13 ,
an operating frequency of the first DC/DC converter and an operating frequency of the second DC/DC converter being mutually different.
19. The movable body of claim 13 ,
power outputted from the second power storage device being used as power for driving the movable body.