Linear power supply pre-regulator for electrical climate compressors
AssigneeHanon Systems
InventorsChristoph Neeb, Stephan Werker, Philipp Karutz
Life of this patent
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Abstract
Inverter for an electric compressor comprising an auxiliary voltage supply that supplies a control electronics of the inverter with a DC voltage. The auxiliary voltage supply comprises a series circuit of a linear voltage regulator and a linear pre-regulator. The linear pre-regulator comprises a transistor and is connected to the input terminal of the linear voltage regulator. The linear pre-regulator and/or the linear voltage regulator are advantageously actively cooled by a refrigerant utilized in the electric compressor.
Claims7
An inverter for an electric compressor, wherein
- the inverter comprises an auxiliary voltage supply which supplies a control electronics of the inverter with DC voltage,
- the auxiliary voltage supply comprises a series circuit of a linear voltage regulator and a linear pre-regulator, and
- the linear pre-regulator comprises a transistor which is connected to the input terminal of the linear voltage regulator, wherein only one of the linear pre-regulator and the linear voltage regulator is actively cooled by a refrigerant utilized in the electric compressor, wherein the linear pre-regulator comprises furthermore a regulation unit which operates the transistor in the linear range such that the transistor generates a voltage drop from the input voltage of the auxiliary voltage supply to a predetermined output voltage, and wherein the transistor is disposed on a circuit board of the inverter and via thermal vias connected to an housing of the electric compressor, wherein the thermal vias are thermally conducting through-holes through the circuit board.
An inverter for an electric compressor, wherein
- the inverter comprises an auxiliary voltage supply which supplies a control electronics of the inverter with DC voltage,
- the auxiliary voltage supply comprises a series circuit of a linear voltage regulator and a linear pre-regulator, and
- the linear pre-regulator comprises a transistor which is connected to the input terminal of the linear voltage regulator, wherein only one of the linear pre-regulator and the linear voltage regulator is actively cooled by a refrigerant utilized in the electric compressor, wherein the linear pre-regulator comprises furthermore a regulation unit which operates the transistor in the linear range such that the transistor generates a voltage drop from the input voltage of the auxiliary voltage supply to a predetermined output voltage, wherein the main portion of the power loss is not generated in the linear voltage regulator but rather in the linear pre-regulator and the linear voltage regulator operates with minimal difference between the input voltage of the linear voltage regulator and the output voltage of the linear voltage regulator in the range of 0.1 V to 1 V, wherein the linear pre-regulator comprises furthermore a regulation unit which monitors the input voltage of the auxiliary voltage supply and switches off the transistor if the input voltage exceeds a threshold value, wherein the transistor is disposed on a circuit board of the inverter and via thermal vias connected to an housing of the electric compressor, wherein the thermal vias are thermally conducting through-holes through the circuit board, and wherein the auxiliary voltage supply comprises furthermore a control unit which switches off the transistor in response to a shutdown signal.
Dependencies are inferred from the claim text.