Converter and power converter that becomes it with the converter
First Claim
1. A converter comprising a converter circuit including a plurality of bridge-connected semiconductor switching devices for converting AC power into DC power, a smoothing condenser connected in parallel to DC side of said converter circuit and a condenser current detector provided in a condenser circuit to control a condenser current flowing through said smoothing condenser to be a set value.
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Accused Products
Abstract
A converter includes a converter circuit 1 having a plurality of bridge-connected semiconductor switching devices for converting AC power into DC power, a smoothing condenser connected in parallel to the DC side of the converter circuit and a current detector provided in a condenser circuit to control a condenser current flowing through the smoothing condenser to be a set value. The condenser current is controlled to be the set value (e.g. zero) to thereby reduce the capacity of the smoothing condenser and make the converter small.
37 Citations
18 Claims
- 1. A converter comprising a converter circuit including a plurality of bridge-connected semiconductor switching devices for converting AC power into DC power, a smoothing condenser connected in parallel to DC side of said converter circuit and a condenser current detector provided in a condenser circuit to control a condenser current flowing through said smoothing condenser to be a set value.
- 6. A converter of packaged type comprising a main circuit board in which a converter circuit including a plurality of bridge-connected semiconductor switching devices for converting AC power into DC power is formed, a controller board in which a controller for controlling said plurality of semiconductor switching devices is formed, a package in which said main circuit board is provided and on which said controller board is placed to connect therebetween, an external terminal for a smoothing condenser connected in parallel to DC side of said converter circuit and which is mounted at periphery of said package and a condenser current detector connected between said external terminal and said converter circuit.
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11. A converter of packaged type comprising
a main circuit board in which two sets of power converter circuits each including a plurality of bridge-connected semiconductor switching devices are connected to each other through a DC circuit, a controller board in which a controller for controlling said plurality of semiconductor switching devices for said two sets of power converter circuits is formed and a package in which said main circuit board is provided and on which said controller board is placed to connect therebetween, said package including two sets of AC terminals connected to said two sets of power converter circuits, respectively, an external terminal for a smoothing condenser connected in parallel to said DC circuit and an external terminal connected to said controller, all said terminals being disposed at periphery of said package, said main circuit board including at least two current detectors for detecting a DC current flowing through said external terminal for said smoothing condenser and DC currents in said power converter circuits.
Specification