System for actively reducing radial vibrations in a rotating shaft, and method of operating the system to achieve this

• US 6,138,629 A
• Filed: 07/23/1998
• Issued: 10/31/2000
• Est. Priority Date: 08/31/1995
• Status: Expired due to Fees

• Current Assignee: Isad Electronic Systems GmbH & Co. KG
• Original Assignee: Grundl und Hoffman GmbH, Isad Electronic Systems GmbH & Co. KG
• Inventors: Zeyen, Klaus-Peter, Hoffmann, Bernhard, Grundl, Andreas, Pels, Thomas, Masberg, Ullrich
• Primary Examiner(s): KAMEN, NOAH P
• Assistant Examiner(s): KAMEN, NOAH P
• Application Number:
  US09/043,567
• Time in Patent Office: 831 Days
• Field of Search: 123/192.1, 310/51, 318/114, 318/126, 318/127, 318/128, 335/266, 60/698, 60/713, 60/716, 60/718, 60/719, 180/65.2, 180/65.4
• US Class Current: 123/192.1
• CPC Class Codes: B60K 2001/003 with means for cooling the electrical propulsion units
• CPC Class Codes: B60K 2006/262 the motor or generator are used as clutch, e.g. between engine and driveshaft
• CPC Class Codes: B60K 2006/268 Electric drive motor starts the engine, i.e. used as starter motor
• CPC Class Codes: B60K 28/16 responsive to, or preventing, skidding of wheels brake control systems for vehicle drive stability B60T8/1755; arrangements responsive to a speed condition for adjusting wheel braking force B60T8/32; control of vehicle driving stability otherwise than by controlling the propulsion unit only B60W30/02; preventing wheel slippage by reducing power in rail vehicles B61C15/00
• CPC Class Codes: B60K 6/22 characterised by apparatus, components or means specially adapted for HEVs
• CPC Class Codes: B60K 6/26 characterised by the motors or the generators
• CPC Class Codes: B60K 6/387 Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
• CPC Class Codes: B60K 6/44 Series-parallel type
• CPC Class Codes: B60L 2200/26 Rail vehicles
• CPC Class Codes: B60L 2220/52 Clutch motors
• CPC Class Codes: B60L 2240/443 Torque
• CPC Class Codes: B60L 2270/145 Structure borne vibrations
• CPC Class Codes: B60L 7/003 Dynamic electric braking by short circuiting the motor
• CPC Class Codes: B60L 7/28 Eddy-current braking
• CPC Class Codes: B60T 1/10 by utilising wheel movement for accumulating energy, e.g. driving air compressors
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 20/10 Controlling the power contribution of each of the prime movers to meet required power demand
• CPC Class Codes: B60W 2510/0657 Engine torque
• CPC Class Codes: B60W 30/20 : Reducing vibrations in the driveline
• CPC Class Codes: F02B 67/04 : of mechanically-driven auxiliary apparatus
• CPC Class Codes: F02B 75/06 : Engines with means for equalising torque
• CPC Class Codes: F02D 2250/24 : by using an external load, e.g. a generator
• CPC Class Codes: F02N 11/0866 : comprising several power sources, e.g. battery and capacitor or two batteries
• CPC Class Codes: F16F 15/1292 : characterised by arrangements for axially clamping or positioning or otherwise influencing the frictional plates
• 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: F16H 2061/0422 : by an electric machine, e.g. by accelerating or braking the input shaft
• CPC Class Codes: H02K 51/00 : Dynamo-electric gears, i.e. dynamo-electric means for transmitting mechanical power from a driving shaft to a driven shaft and comprising structurally interrelated motor and generator parts
• CPC Class Codes: H02K 7/108 : with friction clutches
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y02T 10/64 : Electric machine technologies in electromobility
• CPC Class Codes: Y10S 903/903 : having energy storing means, e.g. battery, capacitor
• CPC Class Codes: Y10S 903/906 : Motor or generator
• CPC Class Codes: Y10S 903/914 : Actuated, e.g. engaged or disengaged by electrical, hydraulic or mechanical means
• CPC Class Codes: Y10S 903/946 : Characterized by control of driveline clutch
• CPC Class Codes: Y10S 903/947 : Characterized by control of braking, e.g. blending of regeneration, friction braking
• CPC Class Codes: Y10S 903/96 : having chargeable mechanical accumulator

Abstract

The invention concerns a system for active reduction of radial vibrations of a rotating shaft (4), especially the drive shaft of an internal combustion engine (1), with at least one active electromagnetic device (7; 10; 15, 16), which is configured and controlled such that it applies radial forces to the shaft (4), which counteract the radial vibrations of the shaft (4).

Claims

1. System for active dampening of vibrations of the drive shaft of an internal combustion engine, by means of an electric machine, which has two active electromagnetic units that can rotate relative to each other, one of which is connected to the rotating shaft and the other is secured against turning or--alternatively--connected to another rotating shaft, wherein one of the active units comprises at least two electrically independently actuable active sectors for generating traveling fields, each of which exerts forces with radial and tangential components on the other active unit, such that the electric machine dampens both radial and rotational vibrations of the shaft.

2. System per claim 1, in which the independently actuable active sectors are separate active sectors.

3. System per claim 1, in which the independently actuable active sectors are formed by independent winding segments, which are arranged jointly on a magnetically conducting stator body.

4. System according to claim 1, in which the electric machine can load the shaft in addition with a driving or braking constant torque.

5. System according to claim 1, in which the electric machine is designed such that it also has the function of a starter for the internal combustion engine, a generator for power supply, a vehicle brake, or an acceleration booster for the vehicle.

6. System according to claim 1, in which a braking or slipping action is generated and energy obtained in the braking or slipping action is at least partly stored up and at least partly reused.

7. System according to claim 1, in which the electric machine is controlled by an invertor, which supplies it with currents and voltages of variable amplitude, frequency and phase in order to generate the electromagnetic fields.

8. System according to claim 1, in which both electromagnetic units can rotate, one of which is connected to the drive shaft and the other to a vehicle take-off shaft of a vehicle drive train, and the electric machine also acts as an electromagnetic coupling in the drive train or as an active transmission synchronization device for a transmission arranged in the drive train, by adjusting suitable relative rotary speeds between the electromagnetic units.