Patent Forecast

2. The parallel power supply device according to claim 1, wherein (3) (4)

the voltage control unit in each control circuit includes:

a first compensator and a second compensator as the compensator;

a voltage control circuit for generating target current so that the deviation between the voltage of the common load and the target voltage becomes 0 by the first compensator; and

a current control circuit for generating the duty cycle so that a deviation between the target current and current between the second switching circuit and the DC power supply becomes 0 by the second compensator.

10. The parallel power supply device according to claim 2, wherein (1) (1)

capacitors are connected in parallel to the respective semiconductor switching elements in the first and second switching circuits so as to allow the semiconductor switching elements to perform zero voltage switching.

13. The parallel power supply device according to claim 10, wherein (1) (2)

one of the semiconductor switching elements in each of the first and second switching circuits is defined as a reference element, and one of the semiconductor switching elements that is diagonal thereto in each of the first and second switching circuits is defined as a diagonal element, and

each control circuit determines, as the first and second phase shift amounts, phase differences of drive signals for the respective diagonal elements in the first and second switching circuits relative to phases of drive signals for the reference elements in a power-transmitting-side circuit of the first and second switching circuits.

16. The parallel power supply device according to claim 13, wherein (1) (1)

when the magnitude of the duty cycle generated by the voltage control unit is smaller than the set value, the control circuit fixes the first and second phase shift amounts at a maximum value.

19. The parallel power supply device according to claim 16, wherein (0) (1)

11. The parallel power supply device according to claim 2, wherein (1) (2)

one of the semiconductor switching elements in each of the first and second switching circuits is defined as a reference element, and one of the semiconductor switching elements that is diagonal thereto in each of the first and second switching circuits is defined as a diagonal element, and

each control circuit determines, as the first and second phase shift amounts, phase differences of drive signals for the respective diagonal elements in the first and second switching circuits relative to phases of drive signals for the reference elements in a power-transmitting-side circuit of the first and second switching circuits.

14. The parallel power supply device according to claim 11, wherein (1) (1)

when the magnitude of the duty cycle generated by the voltage control unit is smaller than the set value, the control circuit fixes the first and second phase shift amounts at a maximum value.

17. The parallel power supply device according to claim 14, wherein (0) (1)

20. The parallel power supply device according to claim 2, wherein (0) (1)

3. The parallel power supply device according to claim 1, wherein (1) (1)

capacitors are connected in parallel to the respective semiconductor switching elements in the first and second switching circuits so as to allow the semiconductor switching elements to perform zero voltage switching.

12. The parallel power supply device according to claim 3, wherein (1) (2)

one of the semiconductor switching elements in each of the first and second switching circuits is defined as a reference element, and one of the semiconductor switching elements that is diagonal thereto in each of the first and second switching circuits is defined as a diagonal element, and

each control circuit determines, as the first and second phase shift amounts, phase differences of drive signals for the respective diagonal elements in the first and second switching circuits relative to phases of drive signals for the reference elements in a power-transmitting-side circuit of the first and second switching circuits.

15. The parallel power supply device according to claim 12, wherein (1) (1)

when the magnitude of the duty cycle generated by the voltage control unit is smaller than the set value, the control circuit fixes the first and second phase shift amounts at a maximum value.

18. The parallel power supply device according to claim 15, wherein (0) (1)

4. The parallel power supply device according to claim 1, wherein (1) (2)

one of the semiconductor switching elements in each of the first and second switching circuits is defined as a reference element, and one of the semiconductor switching elements that is diagonal thereto in each of the first and second switching circuits is defined as a diagonal element, and

each control circuit determines, as the first and second phase shift amounts, phase differences of drive signals for the respective diagonal elements in the first and second switching circuits relative to phases of drive signals for the reference elements in a power-transmitting-side circuit of the first and second switching circuits.

5. The parallel power supply device according to claim 4, wherein (1) (1)

when the magnitude of the duty cycle generated by the voltage control unit is smaller than the set value, the control circuit fixes the first and second phase shift amounts at a maximum value.

6. The parallel power supply device according to claim 5, wherein (0) (1)

7. The parallel power supply device according to claim 1, wherein (1) (1)

Application US20190157979

PARALLEL POWER SUPPLY DEVICE

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