US3919607A
Expired / Lapsed
US
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Apparatus for damping oscillations in a track-bound propulsion vehicle having a synchronous linear motor
Assignee: Siemens AG
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Filing: 1974-08-29
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Granted: 1975-11-11
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Expires: 1994-08-29
Abstract
Abstract Apparatus for damping oscillations in a linear motor comprising an excitation winding and a traveling field winding supplied from a fixed a-c system in which means are provided for generating a transversal field in the air gap of the synchronous linear motor, with the generating means controlled by a control means providing an adjustable current thereto in response to a control signal supplied from a control device having as an input the output of measuring means developing a signal proportional to the oscillations in the propulsion vehicle drive.
Inventors
- 👤 Adolf Habock
- 👤 Joachim Holtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:25
CPC Classifications
B; B60; B60L; B60L15/00; B60L15/002; B60L15/005; B60L13/00; B60L13/03; H; H02; H02K; H02K41/00; H02K41/02; H02K41/03; B60L2200/00; B60L2200/26; B60L2220/00; B60L2220/10; B60L2220/14; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
106 words
In the trackbound propulsion vehicle driven by a synchronous linear motor having an excitation winding and a traveling field winding supplied from a fixed a-c system, means of generating a transversal field in the air gap for the synchronous linear motor comprising: a. a transversal field winding; b. control means to supply said transversal field winding with and variable current, in response to a input signal; c. means to measure the power oscillations in said linear motor and to provide an output indicative thereof; and d. means having the output of said measuring means as an input and providing a control signal to said control means.
Claim 2
Dependent Claim
106 words
In the trackbound propulsion vehicle driven by a synchronous linear motor having an excitation winding and a traveling field winding supplied from a fixed a-c system, means of generating a transversal field in the air gap for the synchronous linear motor comprising: a. a transversal field winding; b. control means to supply said transversal field winding with and variable current, in response to a input signal; c. means to measure the power oscillations in said linear motor and to provide an output indicative thereof; and d. means having the output of said measuring means as an input and providing a control signal to said control means.
Claim 3
Dependent Claim
37 words
Apparatus according to claim 1 and further including a bandpass filter between said measuring means and said means providing a control signal, said bandpass filter tuned to the range of oscillation frequencies expected in said propulsion vehicle.
Claim 4
Dependent Claim
30 words
Apparatus according to claim 2 wherein said bandpass filter comprises a capacitor coupled in series with two series resistors with a shunt capacitor coupled between the junction of said resistors.
Claim 5
Dependent Claim
37 words
Apparatus according to claim 2 wherein said bandpass filter comprises an operational amplifier having an input circuit comprising a capacitor in series with a resistor and having a parallel resistor and capacitor in its negative feedback circuit.
Claim 6
Dependent Claim
33 words
Apparatus according to claim 1 wherein said measuring means comprises means for measuring electrical power arranged in the connection between said fixed a-c system and the traveling field winding of said linear motor.
Claim 7
Dependent Claim
28 words
Apparatus according to claim 1 wherein said measuring means comprises a current transformer arranged between said fixed a-c system and the traveling field winding of said linear motor.
Claim 8
Dependent Claim
17 words
Apparatus according to claim 1 wherein said measuring means comprise an accelerometer fixed to the propulsion vehicle.
Claim 9
Dependent Claim
39 words
Apparatus according to claim 1 wherein in said measuring means comprises a pole position transducer measuring the position of the pole piece of the synchronous linear motor relative to the pole pitch of the stator installed on the roadbed.
Claim 10
Dependent Claim
99 words
Apparatus according to claim 1 wherein the excitation winding and traveling field winding of said synchronous linear motor are both arranged on the same one of the movable and immovable part of the linear motor and wherein said transversal field winding is arranged on the same part of the synchronous linear motor as said excitation winding and traveling field winding, said transversal field winding being in the form of traveling field winding physically displaced in the forward propulsion direction with respect to the traveling field winding, and wherein said control means comprise means for supplying a variable a-c current.
Claim 11
Dependent Claim
21 words
Apparatus according to claim 9 wherein said control means are installed between the fixed a-c system and said transversal field winding.
Claim 12
Dependent Claim
24 words
Apparatus according to claim 9 wherein said transversal field winding is displaced with respect to said traveling field winding by half a pole pitch.
Claim 13
Dependent Claim
14 words
Apparatus according to claim 9 wherein said control means comprise an a-c control means.
Claim 14
Dependent Claim
29 words
Apparatus according to claim 12 wherein said a-c control means are capable of operating said transversal field selectively to lead said traveling field and to lag said traveling field.
Claim 15
Dependent Claim
27 words
Apparatus according to claim 13 wherein said transversal field winding is a three phase filed winding having phase windings which are provided with Y connected center taps.
Claim 16
Dependent Claim
82 words
An apparatus according to claim 1 wherein the excitation winding of said synchronous linear motor is arranged on one part and the traveling field winding on the other part of the linear motor and wherein said transversal field winding is arranged on the same part as the excitation winding and is designed as an excitation winding physically displaced with respect to the excitation winding in the forward propulsion direction, said control means supplying said transversal field winding with a variable d-c current.
Claim 17
Dependent Claim
20 words
Apparatus according to claim 15 wherein said transversal field winding is supplied from an a-c system through said control means.
Claim 18
Dependent Claim
23 words
Apparatus according to claim 15 wherein said transversal field winding is displaced with respect to said excitation winding by half a pole pitch.
Claim 19
Dependent Claim
20 words
Apparatus according to claim 15 wherein said current control means comprise a rectifier bridge made up of controlled semi-conductor rectifiers.
Claim 20
Dependent Claim
14 words
Apparatus according to claim 15 wherein said contol means is arranged for four-quandrant operation.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |