Flywheel system for a rotary machine

• US 5,664,534 A
• Filed: 05/20/1996
• Issued: 09/09/1997
• Est. Priority Date: 05/20/1995
• Status: Expired due to Fees

• Current Assignee: FEV Motorentechnik GmbH and Co KG (E.ON SE)
• Original Assignee: FEV Motorentechnik GmbH and Co KG (E.ON SE)
• Inventors: Schmitz, Gunter
• Primary Examiner(s): Kamen, Noah P.
• Application Number:
  US08/650,525
• Time in Patent Office: 477 Days
• Field of Search: 123/192.1, 74/572
• US Class Current: 123/192.1
• CPC Class Codes: F02B 75/06 Engines with means for equalising torque
• CPC Class Codes: F16F 15/18 using electric, magnetic or electromagnetic means suppression of vibrations of rotating systems by use of non-rotating magnetic or electromagnetic means F16F15/03; dynamo-electric devices H02K; control effected upon generator excitation circuit to reduce harmful effects of overloads or transients H02P9/10
• CPC Class Codes: F16F 2222/08 Inertia
• CPC Class Codes: H02K 11/00 Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection casings, enclosures or supports H02K5/00
• CPC Class Codes: H02K 49/043 with a radial airgap
• CPC Class Codes: H02K 49/06 of the synchronous type H02K49/10 takes precedence
• CPC Class Codes: Y10T 74/2127 with electrical or magnetic damping

Abstract

A flywheel system for a machine includes a rotary body affixed to a rotary shaft of the machine for rotating with the shaft as a unit; an additional rotary body forming a flywheel mass and being mounted on the shaft for rotation relative thereto; an electromagnetic device for torque-transmittingly coupling the rotary bodies to one another in a contactless manner; and a control for actuating the electromagnetic device.

Claims

1. A flywheel system for a machine having a rotary shaft, comprising

(a) a rotary body adapted to be affixed to the shaft for rotating therewith as a unit;

(b) an additional rotary body forming a flywheel mass and being adapted to be mounted on the shaft for rotation relative thereto;

one of the rotary bodies being a first rotary body and another of the rotary bodies being a second rotary body;

(c) control means; and

(d) electromagnetic means for torque-transmittingly coupling said first and second rotary bodies to one another in a contactless manner;

said electromagnetic means including

(1) a plurality of pole bodies mounted circumferentially on said first rotary body in a uniform distribution;

each pole body having a pole face oriented towards a surface of said second rotary body;

(2) a separate coil carried by each said pole body; and

(3) means for electrically connecting each said coil with said control means for actuating said electromagnetic means.

2. The flywheel system as defined in claim 1, further comprising a plurality of permanent magnets mounted circumferentially on said second rotary body in a uniform distribution;

said permanent magnets being oriented towards said pole faces.

3. The flywheel system as defined in claim 1, further comprising current-supplying means for said coils;

said current-supplying means including slip rings arranged for rotation with said first rotary body and being connected to said coils for supplying said coils with current.

4. The flywheel system as defined in claim 1, further comprising contactless current-supplying means for said coils;

said contactless current-supplying means including magnetic energy coupling means including a stationary transmitter coil and a receiver coil mounted on said first rotary body.

5. The machine as defined in claim 1, wherein said machine is a piston-operated machine.

6. The machine as defined in claim 5, wherein said piston-operated machine is an internal combustion engine.

7. The machine as defined in claim 6, further comprising an engine control for controlling an operation of the internal combustion engine;

said control means forming part of said engine control.

8. The machine as defined in claim 7, further comprising an rpm sensor for emitting signals representing a rotational speed of said additional rotary body;

said rpm sensor being connected to said engine control.

9. A flywheel system for a machine having a rotary shaft, comprising

(a) a rotary body adapted to be affixed to the shaft for rotating therewith as a unit;

(b) an additional rotary body forming a flywheel mass and being adapted to be mounted on the shaft for rotation relative thereto;

said rotary body adapted to be affixed to the shaft having a flywheel mass less than an effective flywheel mass of said additional rotary body;

(c) electromagnetic means for torque-transmittingly coupling the rotary bodies to one another in a contactless manner; and

(d) control means for actuating said electromagnetic means.

10. A flywheel system for a machine having a rotary shaft, comprising

(a) a rotary body adapted to be affixed to the shaft for rotating therewith as a unit;

said rotary body being of an electrically conductive solid material to form an eddy current wheel;

(b) an additional rotary body forming a flywheel mass and being adapted to be mounted on the shaft for rotation relative thereto;

(c) electromagnetic means for torque-transmittingly coupling the rotary bodies to one another in a contactless manner; and

(d) control means for actuating said electromagnetic means.

11. A flywheel system for a machine having a rotary shaft, comprising

(a) a rotary body adapted to be affixed to the shaft for rotating therewith as a unit;

said rotary body being a flywheel;

(b) an additional rotary body forming a flywheel mass and being adapted to be mounted on the shaft for rotation relative thereto;

(c) electromagnetic means for torque-transmittingly coupling the rotary bodies to one another in a contactless manner; and

(d) control means for actuating said electromagnetic means.

12. A flywheel system for a machine having a rotary shaft, comprising

(a) a rotary body adapted to be affixed to the shaft for rotating therewith as a unit;

(b) an additional rotary body forming a flywheel mass and being adapted to be mounted on the shaft for rotation relative thereto;

(c) electromagnetic means for torque-transmittingly coupling the rotary bodies to one another in a contactless manner;

(d) control means for actuating said electromagnetic means; and

(e) an rpm sensor for emitting signals representing a rotational speed of the shaft;

said rpm sensor being connected to said control means.

13. A flywheel system for a machine having a rotary shaft, comprising

(a) a rotary body adapted to be affixed to the shaft for rotating therewith as a unit;

(b) an additional rotary body forming a flywheel mass and being adapted to be mounted on the shaft for rotation relative thereto;

(c) electromagnetic means for torque-transmittingly coupling the rotary bodies to one another in a contactless manner;

(d) control means for actuating said electromagnetic means; and

(e) an rpm sensor for emitting signals representing a rotational speed of said additional rotary body;

said rpm sensor being connected to said control means.