Power converter
First Claim
1. A power converter, comprising:
- a semiconductor module constituting a main circuit for power conversion;
a capacitor electrically connected to the main circuit;
a drive circuit that provides the main circuit with a drive signal used in power conversion operation;
a control circuit that provides the drive circuit with a control signal used to prompt the drive circuit to provide the drive signal; and
a cooling chamber comprising a coolant passage formed therein, all housed inside a casing, wherein;
a chamber wall of the cooling chamber is formed with a thermally conductive material;
at least the semiconductor module is housed inside the cooling chamber; and
at least the capacitor and be control circuit are disposed outside the cooling chamber,further wherein the coolant passage is located over a lower area of the cooling chamber; and
the capacitor, thermally isolated from the semiconductor module via the coolant passage, is disposed on a lower side relative to the cooling chamber and is also thermally connected to the coolant passage.
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Accused Products
Abstract
The object is to provide a power converter which is capable of minimizing an extent to which the power converter components other than the semiconductor module are thermally affected by the heat originating from the semiconductor module.
A casing houses: semiconductor modules 20, 30 constituting a main circuit for power conversion; a capacitor 50 electrically connected to the main circuit; drive circuits 70, 71 that provide the main circuit with a drive signal used in power conversion operation; a control circuit 74 that provides the drive circuit with a control signal used to prompt the drive circuit to provide the drive signal. Within the casing, a cooling chamber including a coolant passage 28 is formed, and a chamber wall of the cooling chamber is formed with a thermally conductive material. At least the semiconductor modules 20, 30 are housed inside the cooling chamber, and at least the capacitor 50 and the control circuit 74 are disposed outside the cooling chamber.
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Citations
15 Claims
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1. A power converter, comprising:
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a semiconductor module constituting a main circuit for power conversion; a capacitor electrically connected to the main circuit; a drive circuit that provides the main circuit with a drive signal used in power conversion operation; a control circuit that provides the drive circuit with a control signal used to prompt the drive circuit to provide the drive signal; and a cooling chamber comprising a coolant passage formed therein, all housed inside a casing, wherein; a chamber wall of the cooling chamber is formed with a thermally conductive material; at least the semiconductor module is housed inside the cooling chamber; and at least the capacitor and be control circuit are disposed outside the cooling chamber, further wherein the coolant passage is located over a lower area of the cooling chamber; and the capacitor, thermally isolated from the semiconductor module via the coolant passage, is disposed on a lower side relative to the cooling chamber and is also thermally connected to the coolant passage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A power converter comprising:
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a semiconductor module that comprises a semiconductor element for switching used to convert input electric power to specific electric power and output the specific electric power resulting from conversion; a smoothing capacitor electrically connected to the semiconductor element; a drive circuit that, based upon a control signal, provides the semiconductor element with a drive signal used to drive the semiconductor element; and a control circuit that provides the control signal to the drive circuit, all housed inside a casing, wherein; a separate chamber is formed inside the casing; the separate chamber is an adiabatic chamber comprising a coolant passim formed therein and a partitioning wall defining the chamber and constituted of a thermally conductive material so as to inhibit heat release from inside the chamber to an outside; at least the semiconductor module is housed inside the adiabatic chamber; and at least the smoothing capacitor and the control circuit are disposed outside the adiabatic chamber, further wherein the coolant passage is located over a lower area of the adiabatic chamber; and the capacitor, thermally isolated from the semiconductor module via the coolant passage, is disposed on a lower side relative to the adiabatic chamber and is also thermally connected to the coolant passage. - View Dependent Claims (12)
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13. A power converter, comprising:
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a semiconductor module that converts input electric power to specific electric power and outputs the specific power resulting from conversion by engaging a semiconductor element in switching operation; a capacitor that forms a smoothing circuit on a DC-side of the semiconductor element; a drive circuit that provides the semiconductor element with a drive signal used to engage the semiconductor element in operation; a control circuit that provides the drive circuit with a control signal used to generate the drive signal, all housed inside a casing, wherein; an internal space at the casing is divided into a plurality of separate internal spaces; in one of the separate internal spaces at the casing, which is defined and enclosed by a thermally conductive material, a coolant passage is formed and at least the semiconductor module is housed; at least the capacitor and the control circuit are housed inside an other internal space at the casing not occupied by the semiconductor module; the other separate internal space is formed under the one of the separate internal spaces at the casing; the coolant passage is formed between the one of the separate internal spaces at the casing and the other separate internal space at the casing; and the capacitor, thermally isolated from the semiconductor module via the coolant passage, is housed in the other separate internal space at the casing and is thermally connected to the coolant passage.
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14. A power converter, comprising:
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a semiconductor module that converts input electric power to specific electric power and outputs the specific power resulting from conversion by engaging a semiconductor element in switching operation; a capacitor that forms a smoothing circuit on a DC-side of the semiconductor element; a drive circuit that provides the semiconductor element with a drive signal used to engage the semiconductor element in operation; a control circuit that provides the drive circuit with a control signal used to generate the drive signal, all housed inside a casing, wherein; an internal space at the casing is divided into a plurality of separate internal spaces; in one of the separate, internal spaces at the casing, which is defined and enclosed by a thermally conductive material, a coolant passage is formed and at least the semiconductor module is housed; at least the capacitor and the control circuit are housed inside an other internal space at the casing not occupied by the semiconductor module; and the one of the separate internal spaces at the casing is present at an uppermost position inside the casing.
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15. A power converter, comprising:
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a semiconductor module constituting a main circuit for power conversion; a capacitor electrically connected to the main circuit; a drive circuit that provides the main circuit with a drive signal used in power conversion operation; a control circuit that provides the drive circuit with a control signal used to prompt the drive circuit to provide the drive signal; and a wiring member that electrically connects the capacitor with the semiconductor module, all housed inside a casing, wherein; the semiconductor module and the capacitor are disposed in close proximity to each other; the wiring member comprises a positive pole-side plate-like wiring conductor having a positive pole-side plate-like wiring terminal formed as an integrated part thereof and a negative pole-side plate-like wiring conductor having a negative pole-side plate-like wiring terminal formed as an integrated part thereof, layered one on top of another via an insulating member; the capacitor comprises a capacitor terminal formed by layering a positive pole-side plate-like capacitor terminal and a negative pole-side plate-like capacitor terminal one on top of another via an insulating member; the capacitor and the wiring member are connected with each other by clamping the capacitor terminal between the positive pole-side plate-like wiring terminal and the negative pole-side plate-like wiring terminal so that terminals with matching polarity face opposite each other and by locking together the capacitor terminal, the positive pole-side plate-like wiring terminal and the negative pole-side plate-like wiring terminal from a clamping direction; a cooling chamber with a coolant passage formed therein is formed inside the casing; a peripheral wall defining the cooling chamber is constituted of a thermally conductive material; at least the semiconductor module is housed inside the cooling chamber; the coolant passage is located over a lower area of the cooling chamber; the capacitor, thermally isolated from the semiconductor module via the coolant passage, is disposed on a lower side relative to the cooling chamber and is also thermally connected to the coolant passage; and the cooling chamber is located at an uppermost position inside the casing.
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Specification