Power conversion device
AssigneeHitachi Industrial Products, Ltd.
InventorsMizuki Nakahara, Takae Shimada, Kimihisa Furukawa, Mitsuhiro Kadota
Life of this patent
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Abstract
Provided is a power conversion device which can be configured inexpensively and in which initial charging can be performed quickly. Accordingly, the power conversion device is provided with: a power conversion device cell having a first converter for converting a first AC voltage to a first DC voltage, a second converter for converting the first DC voltage to another voltage, and a first capacitor charged by the first DC voltage; and a control circuit for allowing charging of the first capacitor while changing the operational state of the first converter in accordance with the first DC voltage.
Claims5
A power conversion device comprising:
- a power converter cell including:
- a first converter configured to convert a first AC voltage into a first DC voltage;
- a second converter configured to convert the first DC voltage into another voltage;
- and
- a first capacitor charged using the first DC voltage;
- and
- a control circuit configured to effect, while changing the operation state of the first converter in accordance with the first DC voltage, charging the first capacitor;
- wherein the control circuit operates the second converter to make the first DC voltage closer to a first predetermined voltage;
- and
- wherein the control circuit operates the second converter to make the first DC voltage closer to the first predetermined voltage under a condition that the first DC voltage is equal to or higher than a predetermined startup voltage lower than the first predetermined voltage.
A power conversion device comprising:
- a power converter cell including:
- a first converter configured to convert a first AC voltage into a first DC voltage;
- a second converter configured to convert the first DC voltage into another voltage;
- and
- a first capacitor charged using the first DC voltage;
- and
- a control circuit configured to effect, while changing the operation state of the first converter in accordance with the first DC voltage, charging the first capacitor;
- wherein the second converter is a converter configured to convert the first DC voltage into a second DC voltage;
- and
- wherein the power converter cell includes a second capacitor charged with the second DC voltage, the control circuit controls the second converter to charge the second capacitor after the first DC voltage has reached a second predetermined voltage.
Dependencies are inferred from the claim text.