US3914670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for damping oscillations in the propulsion direction in a magnetically suspended propulsion vehicle driven by a synchronous linear motor
Assignee: Siemens AG
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Filing: 1974-11-04
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Granted: 1975-10-21
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Expires: 1994-11-04
Abstract
Abstract A track bound propulsion vehicle such as a magnetically suspended vehicle and driven by a synchronous linear motor having a stator supplied from a fixed ac network with the stator installed along the track as a travelling field winding has a correcting element furnishing an ac output voltage at the network frequency and also connected to the travelling field winding to superimpose a voltage thereon with the phase of the ac output voltage of the correcting element adjustable by means of a control signal receiving an input from means measuring a quantity proportional to oscillations in the propulsion direction for damping such oscillations.
Inventors
- 👤 Joachim Holtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:16
CPC Classifications
B; B60; B60L; B60L15/00; B60L15/002; B60L15/005; B60L2200/00; B60L2200/26; B60L2220/00; B60L2220/10; B60L2220/14; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/902; Y10S505/903; Y10S505/905
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
145 words
In a track bound propulsion vehicle such as a magnetic suspension vehicle having a synchronous linear motor with a stator supplied from a fixed ac network the stator acting as a travelling field winding and having an exciter disposed in the magnetic suspension vehicle as a comovable translator apparatus for damping oscillations in the forward propulsion direction comprising: a. measuring means for developing an output signal proportional to the power oscillations of the synchronous linear motor, b. means having as an input the output of said measuring means for developing a control signal; and c. control means providing an ac output voltage at the frequency of the fixed ac network, said output coupled to said travelling field winding so as to be superimposed on the ac network voltage, with the phase ac output voltage of said control means changing in response to said control signal.
Claim 2
Dependent Claim
145 words
In a track bound propulsion vehicle such as a magnetic suspension vehicle having a synchronous linear motor with a stator supplied from a fixed ac network the stator acting as a travelling field winding and having an exciter disposed in the magnetic suspension vehicle as a comovable translator apparatus for damping oscillations in the forward propulsion direction comprising: a. measuring means for developing an output signal proportional to the power oscillations of the synchronous linear motor, b. means having as an input the output of said measuring means for developing a control signal; and c. control means providing an ac output voltage at the frequency of the fixed ac network, said output coupled to said travelling field winding so as to be superimposed on the ac network voltage, with the phase ac output voltage of said control means changing in response to said control signal.
Claim 3
Dependent Claim
24 words
Apparatus according to claim 1 wherein said control signal also acts to change the magnitude of the ac output voltage of said control means.
Claim 4
Dependent Claim
19 words
Apparatus according to claim 1 wherein said control means comprises a controlled converter supplied from said fixed ac network.
Claim 5
Dependent Claim
18 words
Apparatus as in claim 3 wherein said converter is coupled to the fixed ac network through a transformer.
Claim 6
Dependent Claim
13 words
Apparatus according to claim 4 wherein said converter is an intermediate link converter.
Claim 7
Dependent Claim
36 words
Apparatus according to claim 1 wherein the superposition of the output voltage of said control means on the ac network voltage is accomplished with a coupling transformer disposed between said ac network and said travelling winding.
Claim 8
Dependent Claim
16 words
Apparatus according to calim 6 wherein the transformation ratio of said coupling transformer is approximately 1.
Claim 9
Dependent Claim
16 words
Apparatus according to calim 6 wherein the transformation ratio of said coupling transformer is approximately 1.
Claim 10
Dependent Claim
39 words
Apparatus according to claim 1 wherein said superposition is accomplished by coupling one end of said travelling field winding to said ac network and the other end of said travelling field winding to the output of said control means.
Claim 11
Dependent Claim
81 words
Apparatus according to claim 1 wherein said control means comprise a variable rotary transformer coupling the ac voltage network to said travelling field winding and a servo system controlling the positioning of said variable transformer for adjustment of the phase of its output signal, said servo system having said control signal as an input, said rotary transformer at the same time providing for the super-position of the voltage of the ac network and the ac output voltage of the control means.
Claim 12
Dependent Claim
17 words
Apparatus according to claim 9 wherein the transformation ration of said variable transformer is less than 1.
Claim 13
Dependent Claim
21 words
Apparatus according to claim 1 and further including a filter between said measuring means and said means developing a control signal.
Claim 14
Dependent Claim
19 words
Apparatus according to claim 1 wherein said filter is a band pass filter tuned to the oscillation frequency range.
Claim 15
Dependent Claim
14 words
Apparatus according to claim 1 wherein said band pass filter is a passive filter.
Claim 16
Dependent Claim
14 words
Apparatus as in claim 1 wherein said band pass filter is an active filter.
Claim 17
Dependent Claim
13 words
Apparatus according to claim 1 wherein said filter is a high pass filter.
Claim 18
Dependent Claim
16 words
Apparatus as in claim 1 wherein said measuring means comprises means for measuring active electrical power.
Claim 19
Dependent Claim
18 words
Apparatus according to claim 1 wherein said measuring means comprises a current transformer for measuring the stator current.
Claim 20
Dependent Claim
23 words
Apparatus as in claim 17 wherein said measuring means is disposed in the connection between said coupling transformer and the travelling field winding.
Claim 21
Dependent Claim
36 words
Apparatus as in claim 1 wherein said measuring means is a pole position transmitter measuring the position of the translator of the synchronous linear motor relative to the travellIng field generated by the travelling field winding.
Claim 22
Dependent Claim
28 words
Apparatus according to claim 1 wherein said measuring means comprises means for measuring the linear acceleration of the propulsion vehicle said means being disposed fixed on said translator.
Claim 23
Dependent Claim
67 words
Apparatus according to claim 1 wherein said travelling field winding is a three phase travelling field winding and wherein a switch is provided in the connecting line between the fixed ac network and said travelling field winding, said switch in one position coupling said travelling field winding to said ac network and in the other position coupling the conductors on one side to a common neutral point.
References Cited (Backward Citations)
US3638093A
Cited
US3736880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |