Compressor arrangement for compressed air supply facility

Patent metadata

Field	Value
Publication number	US-10767639-B2
Application number	US-201414769749-A
Country	US
Kind code	B2
Filing date	Feb 18, 2014
Priority date	Mar 4, 2013
Publication date	Sep 8, 2020
Grant date	Sep 8, 2020

Abstract

A compressor arrangement for operating a compressed air supply facility of a vehicle includes a compressor having an electric motor constructed as an electronically commutated, brushless DC motor with a control circuit comprising a power electronics unit, and a pneumatic compressor. The electric motor is constructed in the form of an external rotor motor.

First claim

What is claimed is:

1. A compressor system for operating a compressed air supply system of a vehicle, the compressor system comprising:
a compressor including a brushless DC electric motor comprising a control circuit, the control circuit comprising power electronics; and
a pneumatic compressor element;
wherein the electric motor comprises a stator and an external rotor, wherein the external rotor comprises a rotor bell, and wherein the rotor bell is attached, via a frictional and/or positive connection, to a drive shaft and/or a crankpin;
wherein a cantilever suspends the stator from a motor case, wherein the stator comprises an armature defining a first circumferential channel and the cantilever comprises a first annular protrusion disposed therein;
wherein the cantilever defines a second circumferential channel and the armature comprises a second annular protrusion disposed therein; and
wherein the cantilever is disc-shaped.

2. The system as claimed in claim 1 , wherein the pneumatic compressor element is a single-cylinder, two-cylinder or multi-cylinder compressor element.

3. The system as claimed in claim 1 , wherein the motor includes the drive shaft, the drive shaft being coupled to the rotor,
wherein the rotor rotatably surrounds the stator and is separated from the stator by an air gap,
wherein the rotor includes the rotor bell and a plurality of permanent magnets,
wherein the stator includes an armature having an armature winding connected to the control circuit,
wherein the pneumatic compressor element has at least one connecting rod and at least one piston configured to be driven via the crankshaft coupled to the drive shaft,
wherein the control circuit includes at least one electronic relay and/or a DC-DC converter, and
wherein the power electronics unit has a DC voltage input and an AC voltage output.

4. The system as claimed in claim 3 , wherein the crankpin is formed eccentrically with respect to a central motor axis.

5. The system as claimed in claim 3 , wherein the armature is a laminated core.

6. The system as claimed in claim 1 , wherein the control circuit is configured to determine rotational energy stored by the rotor and to monitor and/or perform open-loop or closed-loop control of an angular speed of the rotor.

7. The system as claimed in claim 1 , wherein the control circuit is configured to:
perform open-loop or closed-loop control of a speed of the rotor, and
adjustably set an operating voltage at the motor and/or a rotary field frequency.

8. The system as claimed in claim 1 , wherein the motor is configured for operation in a pressure control mode, and wherein the control circuit includes a control module connected to a pressure control interface of the pneumatic compressor element to operate the motor in the pressure control mode.

9. The system as claimed in claim 1 , wherein the control circuit is configured to implement a startup and/or rundown control operation to limit a startup current and/or a rundown current of the motor to adjustably set an operating voltage at the motor.

10. The system as claimed in claim 1 , wherein the control circuit is configured to adapt an operating voltage to an onboard electrical system voltage in at least one voltage range, comprising:
(i) a voltage between 8 V and 50 V, and/or
(ii) a voltage between 10 V and 15 V, and/or
(iii) a voltage between 14 V and 37 V, and/or
(iv) a voltage between 42 V and 49 V, and/or
(v) a voltage between 200-650 V.

11. The system as claimed in claim 1 , wherein the drive shaft, the crankpin and at least one connection part form a crank mechanism component, the crank mechanism component being supported by a bearing structure comprising a big end bearing and at least one axle bearing.

12. A compressed air supply system for operating a pneumatic system of a vehicle, the compressed air supply system comprising:
a compressed air feed;
a compressed air port configured to provide compressed air to the pneumatic system;
a vent port;
a pneumatic main line having an air dryer between the compressed air feed and the compressed air port;
a vent line having a vent valve between the compressed air port and the vent port; and
the compressor system as claimed in claim 1 ,
wherein the compressed air feed is supplied with compressed air produced by the compressor system.

13. The compressed air supply system as claimed in claim 12 ; wherein the pneumatic system is a vehicle air spring system; and further comprising a pneumatic main line for operating the vehicle air spring system with a compressed air flow and/or to condition compressed air; a compressed air feed connected to the compressor; and a compressed air port configured to provide compressed air to the air spring system, the compressed air feed and the compressed air port being pneumatically connected.

14. A vehicle, comprising a pneumatic system; and the compressed air supply system as claimed in claim 12 for operating the pneumatic system with a compressed air flow.

15. The vehicle as claimed in claim 14 , wherein the pneumatic system is a vehicle air spring system.

16. The compressed air supply system as claimed in claim 12 , wherein the pneumatic system is an air spring system and/or a brake and/or a conditioning device for compressed air.

17. The system as claimed in claim 1 , wherein the control circuit with the power electronics unit is configured to determine rotational energy stored by the rotor and to control an angular speed of the rotor based on the stored rotational energy.

18. The system of claim 1 , wherein the electric motor further comprises:
the drive shaft and the crankpin, the crankpin being attached to the drive shaft, the crankpin and at least one connection part forming a crank mechanism component;
a balance weight disposed eccentrically with respect to a central axis of the motor.

19. The system of claim 1 , wherein the electric motor further comprises the drive shaft, the driveshaft being supported in a first axle bearing, the first axle bearing being disposed outside the rotor bell.

20. The system of claim 1 , wherein the cantilever is directly affixed to the armature of the stator.

21. The system of claim 1 , wherein the cantilever comprises a cylindrical first section and a funneled second section, the first annular protrusion extending from the funneled second section, the second circumferential channel being defined by and within the funneled second section.

22. The system of claim 21 , wherein the armature comprises a laminated core;
the driveshaft, the crankpin, and at least one connection part forming a crank, the crank being supported by a bearing structure comprising an end bearing and at least one axle bearing, the driveshaft being coupled to the rotor, the crankpin being attached to the driveshaft integrally or via an interference fit or other frictional and/or positive connection.

23. The system of claim 1 , wherein the first annular protrusion fully occupies the first annular channel and the second annular protrusion fully occupies the second annular channel.

24. The system of claim 1 , further comprising:
a roller bearing assembly disposed radially inward of the cantilever and configured to rotationally support the driveshaft;
wherein the motor case comprises a support ring confining an outer race of the roller bearing assembly.

25. The system of claim 1 , wherein the motor case includes a first end

Assignees

• Wabco Gmbh

Inventors

• Meissner Frank
• Seeger Marco

Classifications

• F04B35/04 Primary

  the means being electric · CPC title

• F04B27/04

  having cylinders in star- or fan-arrangement · CPC title

• F04B2203/0204

  Frequency of the electric current · CPC title

• F04B2203/0209

  Rotational speed · CPC title

• H02K1/187

  to inner stators · CPC title