Control device and control method for power supply device

Patent metadata

Field	Value
Publication number	US-9899927-B2
Application number	US-201615200357-A
Country	US
Kind code	B2
Filing date	Jul 1, 2016
Priority date	Jul 2, 2015
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

A control device and method are provided for a power supply device which can perform stable constant voltage constant current control with high responsiveness with a simple configuration. The control device includes: a voltage difference value generation unit which subtracts an output voltage value from a voltage target value to generate a voltage difference value; a current difference value generation unit which subtracts an output current value from a current target value to generate a current difference value; a difference value selection unit which compares the voltage difference value or a value based on the voltage difference value with the current difference value or a value based on the current difference value, and selects the smaller one as a control difference value; and an operation amount generation unit which generates an operation amount for controlling the power supply device based on the control difference value.

First claim

What is claimed is:

1. A control device for a power supply device, the control device comprising:
an output voltage detection unit configured to detect an output voltage value of the power supply device;
a voltage target value setting unit configured to set a voltage target value serving as a target of the output voltage value;
a voltage difference value generation unit configured to subtract the output voltage value from the voltage target value to generate a voltage difference value;
an output current detection unit configured to detect an output current value of the power supply device;
a current target value setting unit configured to set a current target value serving as a target of the output current value;
a current difference value generation unit configured to subtract the output current value from the current target value to generate a current difference value;
a difference value selection unit configured to compare one of the voltage difference value and an adjusted voltage difference value based on the voltage difference value with one of the current difference value and an adjusted current difference value based on the current difference value, and selecting a smaller one as a control difference value; and
an operation amount generation unit configured to generate an operation amount for controlling the power supply device based on the control difference value.

2. The control device for a power supply device according to claim 1 , further comprising:
a filter unit configured to apply predetermined arithmetic processing to the current difference value to generate the adjusted current difference value,
wherein the difference value selection unit compares the voltage difference value with the adjusted current difference value.

3. The control device for a power supply device according to claim 1 , further comprising:
a filter unit configured to apply predetermined arithmetic processing to the voltage difference value to generate the adjusted voltage difference value,
wherein the difference value selection unit compares the adjusted voltage difference value with the current difference value.

4. The control device for a power supply device according to claim 1 , further comprising:
a filter unit configured to apply predetermined arithmetic processing to the voltage difference value and the current difference value to generate the adjusted voltage difference value and the adjusted current difference value, respectively,
wherein the difference value selection unit compares the adjusted voltage difference value with the adjusted current difference value.

5. The control device for a power supply device according to claim 2 ,
wherein the filter unit includes at least one of a gain compensator configured to multiply a predetermined gain, a phase compensator configured to compensate a phase, and a gain adjuster configured to adjust a gain.

6. The control device for a power supply device according to claim 3 ,
wherein the filter unit includes at least one of a gain compensator configured to multiply a predetermined gain, a phase compensator configured to compensate a phase, and a gain adjuster configured to adjust a gain.

7. The control device for a power supply device according to claim 4 ,
wherein the filter unit includes at least one of a gain compensator configured to multiply a predetermined gain, a phase compensator configured to compensate phase, and a gain adjuster configured to adjust a gain.

8. The control device for a power supply device according to claim 5 ,
wherein the gain adjuster performs different types of gain compensation depending on a magnitude of an input value.

9. The control device for a power supply device according to claim 6 ,
wherein the gain adjuster performs different types of gain compensation depending on a magnitude of an input value.

10. The control device for a power supply device according to claim 7 ,
wherein the gain adjuster performs different types of gain compensation depending on a magnitude of an input value.

11. The control device for a power supply device according to claim 1 ,
wherein the difference value selection unit compares the voltage difference value with the current difference value.

12. The control device for a power supply device according to claim 1 ,
wherein the operation amount generation unit is configured to generate the operation amount by a control system having at least one of characteristics of a proportional operation, an integral operation, and a differential operation.

13. The control device for a power supply device according to claim 2 ,
wherein the operation amount generation unit is configured to generate the operation amount by a control system having at least one of characteristics of a proportional operation, an integral operation, and a differential operation.

14. The control device for a power supply device according to claim 3 ,
wherein the operation amount generation unit is configured to generate the operation amount by a control system having at least one of characteristics of a proportional operation, an integral operation, and a differential operation.

15. The control device for a power supply device according to claim 4 ,
wherein the operation amount generation unit is configured to generate the operation amount by a control system having at least one of characteristics of a proportional operation, an integral operation, and a differential operation.

16. The control device for a power supply device according to claim 5 ,
wherein the operation amount generation unit is configured to generate the operation amount by a control system having at least one of characteristics of a proportional operation, an integral operation, and a differential operation.

17. The control device for a power supply device according to claim 6 ,
wherein the operation amount generation unit is configured to generate the operation amount by a control system having at least one of characteristics of a proportional operation, an integral operation, and a differential operation.

18. The control device for a power supply device according to claim 7 ,
wherein the operation amount generation unit is configured to generate the operation amount by a control system having at least one of characteristics of a proportional operation, an integral operation, and a differential operation.

19. The control device for a power supply device according to claim 11 ,
wherein the operation amount generation unit is configured to generate the operation amount by a control system having at least one of characteristics of a proportional operation, an integral operation, and a differential operation.

20. A control method for a power supply device, the control method comprising:
output voltage detection processing for detecting an output voltage value of the power supply device;
voltage target value setting processing for setting a voltage target value serving as a target of the output voltage value;
voltage difference value generation processing for subtracting the output voltage value from the voltage target value to generate a voltage difference value;
output current detection processing for detecting an output current value of the power supply device;
current target value setting processing for setting a current target value serving as a target of the output current value;
current difference value generation processing for subtracting the output current value from the current target value to generate a current difference valu

Assignees

• Tdk Corp

Inventors

• Takegami Eiji

Classifications

• H02M3/33546 Primary

  with automatic control of the output voltage or current (H02M3/33561 takes precedence) · CPC title

• H02M3/335 Primary

  using semiconductor devices only · CPC title

• H02M7/217

  using semiconductor devices only · CPC title

• H02M2001/0009

  Electricity · mapped topic

• H02M1/0009

  Devices or circuits for detecting current in a converter · CPC title