Bus bar for connecting electrical components with arrangement for measuring current and power electronics for controlling an electric machine
First Claim
1. A power electronics device for controlling an electric machine, comprising:
- a power part including a plurality of capacitors and a plurality of power semiconductors, and a bus bar comprising at least one conductive layer with at least one portion having a shaped section operatively connectable to a current-measuring device, said bus bar being plate-shaped and connected to said capacitors and said power semiconductors for distributing current, wherein at least one portion of said bus bar comprises a shaped section operatively arrangeable relative to a current measuring device such that the current-measuring device detects a parameter indicating a current flow through the shaped section and wherein said at least one portion comprises a slot operatively arranged for subdividing a current carrying path through said at least one portion.
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Accused Products
Abstract
A power electronics device for controlling an electric machine, for example a permanently excited synchronous machine includes a plurality of capacitors and power semiconductors connected to a bus bar. To measure currents through the bus bar, the bus bar includes at least one portion with a shaped section. This at least one portion comprises an essentially U-shaped configuration. A sensor of a current-measuring device is provided in the vicinity of the at least one portion to measure the current flowing therethrough. The sensor is designed to measure an electric and/or magnetic field in the bus bar and is in turn connected to an evaluation device. The sensor and/or the evaluation device are disposed on at least one control printed circuit board of the power electronics device, which is arranged underneath the bus bar.
21 Citations
14 Claims
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1. A power electronics device for controlling an electric machine, comprising:
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a power part including a plurality of capacitors and a plurality of power semiconductors, and a bus bar comprising at least one conductive layer with at least one portion having a shaped section operatively connectable to a current-measuring device, said bus bar being plate-shaped and connected to said capacitors and said power semiconductors for distributing current, wherein at least one portion of said bus bar comprises a shaped section operatively arrangeable relative to a current measuring device such that the current-measuring device detects a parameter indicating a current flow through the shaped section and wherein said at least one portion comprises a slot operatively arranged for subdividing a current carrying path through said at least one portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
a current-measuring device having a sensor and an evaluation device connected to said sensor, wherein said sensor is operatively arranged for detecting a parameter indicating a current flow through the shaped section of said at least one portion of said bus bar.
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7. The power electronics device of claim 6, wherein said sensor for measuring the current is proximate said at least one portion with the shaped section of the bus bar.
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8. The power electronics device of claim 6, wherein said sensor is connected to said at least one portion with the shaped section of the bus bar.
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9. The power electronics device of claim 6, wherein said sensor is operative for measuring at least one of an electric field and a magnetic field generated by current flowing through said at least one portion.
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10. The power electronics device of claim 6, wherein said sensor comprises a sensor element based on one of magnetoresistance and the Hall effect.
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11. The power electronics device of claim 1, further comprising a plurality of terminals connected to said bus bar.
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12. The power electronics device of claim 1, further comprising at least one control printed circuit board connected to said power semiconductors.
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13. The power electronics of claim 1, further comprising a current-measuring device having a sensor and an evaluation device connected to said sensor, wherein at least one of said sensor and said evaluation device is arranged on said control printed circuit board.
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14. The power electronics device of claim 13, wherein said sensor is constructed underneath said at least one portion of said bus bar with the shaped section for detecting a parameter indicating a current flow through the shaped section.
Specification