Linear power supply pre-regulator for electrical climate compressors

Patent metadata

Field	Value
Publication number	US-2018017291-A1
Application number	US-201715647846-A
Country	US
Kind code	A1
Filing date	Jul 12, 2017
Priority date	Jul 12, 2016
Publication date	Jan 18, 2018
Grant date	—

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.

First claim

1 . 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 ( 20 ) and a linear pre-regulator, and the linear pre-regulator comprises a transistor and is connected to the input terminal of the linear voltage regulator.

2 . An inverter according to claim 1 , wherein the linear pre-regulator the linear voltage regulator are actively cooled by a refrigerant utilized in the electric compressor.

3 . An inverter according to claim 1 , 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.

4 . An inverter according to claim 1 , wherein the transistor in the switched on state is as low ohmic as feasible.

5 . An inverter according to claim 1 , wherein the auxiliary voltage supply comprises furthermore a control unit which monitors the input voltage of the auxiliary voltage supply and switches off the transistor if the input voltage exceeds a threshold value.

6 . An, inverter according to claim 1 , wherein the auxiliary voltage supply comprises furthermore a control unit which switches off the transistor in response to a shutdown signal.

7 . An inverter according to claim 1 , wherein the inverter comprises a high-voltage domain, which supplies a motor of the electric compressor with AC current, and a low-voltage domain, which processes control commands for the control of the electric compressor, and the auxiliary voltage supply is disposed in the low-voltage domain.

8 . An inverter according to claim 1 , wherein the linear voltage regulator is a low-dropout voltage regulator.

9 . An inverter according to claim 1 , wherein the transistor is a metal oxide semiconductor field effect transistor (MOSFET).

10 . An electric compressor comprising an inverter according to claim 1 .

11 . An inverter according to claim 2 , 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.

12 . An inverter according to claim 2 , wherein the transistor in the switched on state is as low ohmic as feasible.

13 . An inverter according to claim 2 , wherein the auxiliary voltage supply comprises furthermore a control unit which monitors the input voltage of the auxiliary voltage supply and switches off the transistor if the input voltage exceeds a threshold value.

14 . An inverter according to claim 3 , wherein the auxiliary voltage supply comprises furthermore a control unit which monitors the input voltage of the auxiliary voltage supply and switches off the transistor if the input voltage exceeds a threshold value.

15 . An inverter according to claim 4 , wherein the auxiliary voltage supply comprises furthermore a control unit which monitors the input voltage of the auxiliary voltage supply and switches off the transistor if the input voltage exceeds a threshold value.

16 . An inverter according to claim 2 , wherein the auxiliary voltage supply comprises furthermore a control unit which switches off the transistor in response to a shutdown signal.

17 . An inverter according to claim 3 , wherein the auxiliary voltage supply comprises furthermore a control unit which switches off the transistor in response to a shutdown signal.

18 . An inverter according to claim 4 , wherein the auxiliary voltage supply comprises furthermore a control unit which switches off the transistor in response to a shutdown signal.

19 . An inverter according to claim 5 , wherein the auxiliary voltage supply comprises furthermore a control unit which switches off the transistor in response to a shutdown signal.

20 . An inverter according to claim 2 , wherein the inverter comprises a high-voltage domain, which supplies a motor of the electric compressor with AC current, and a low-voltage domain, which processes control commands for the control of the electric compressor, and the auxiliary voltage supply is disposed in the low-voltage domain.

Assignees

• Hanon Systems

Inventors

• Neeb Christoph
• Werker Stephan
• Karutz Philipp

Classifications

• H02M7/48

  using discharge tubes with control electrode or semiconductor devices with control electrode · CPC title

• H02M1/0045 Primary

  Converters combining the concepts of switch-mode regulation and linear regulation, e.g. linear pre-regulator to switching converter, linear and switching converter in parallel, same converter or same transistor operating either in linear or switching mode · CPC title

• H02M1/0006

  Arrangements for supplying an adequate voltage to the control circuit of converters · CPC title

• H02H7/1213

  for DC-DC converters · CPC title

• H02H5/04

  responsive to abnormal temperature {(specially adapted for electric machines H02H7/0852)} · CPC title