US3836837A
Expired / Lapsed
US
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Phase converter
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1973-05-10
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Granted: 1974-09-17
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Expires: 1993-05-10
Abstract
Abstract In the phase converter disclosed, a rotating machine has a stator winding connected at suitable terminals to a multiphase system with a plurality of lines and a single-phase system composed of one of the multiphase lines and a single-phase line. In the machine, a rotor in the form of a squirrel cage winding coacts with the stator voltages to produce unsymmetrical electromotive forces in the multiphase systems. An auxiliary voltage source having a continuously variable magnitude and phase, and connected between the line common to both systems and one of the terminals of the stator, compensates for the unsymmetrical electromotive forces.
Inventors
- 👤 P Rauhut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:53
CPC Classifications
H; H02; H02K; H02K47/00; H02K47/18; H02K47/30
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
102 words
A phase converter for coupling a multiphase system having a plurality of lines with a single-phase system, comprising stator means for closely coupling the systems with each other, said stator means having a plurality of terminals coupled to the lines, rotor means having a squirrel cage winding, and singlephase auxiliary voltage source means connected between one of said multiphase terminals and one of said lines, said voltage source means being continuously variable in magnitude and phase between conditions which produce unsymmetrical voltages at the multiphase terminals and at least one magnitude and phase which produces a symmetrical voltage drop at the terminals.
Claim 2
Dependent Claim
102 words
A phase converter for coupling a multiphase system having a plurality of lines with a single-phase system, comprising stator means for closely coupling the systems with each other, said stator means having a plurality of terminals coupled to the lines, rotor means having a squirrel cage winding, and singlephase auxiliary voltage source means connected between one of said multiphase terminals and one of said lines, said voltage source means being continuously variable in magnitude and phase between conditions which produce unsymmetrical voltages at the multiphase terminals and at least one magnitude and phase which produces a symmetrical voltage drop at the terminals.
Claim 3
Dependent Claim
15 words
A converter as in claim 1, wherein said voltage source means exhibits a low leakage.
Claim 4
Dependent Claim
16 words
A converter as in claim 1, wherein the symmetry is measured relative to a main axis.
Claim 5
Dependent Claim
46 words
A converter as in claim 1, wherein coupling of the single-phase system to the stator means, and the rotor means and the stator means together, are capable of producing an unsymmetrical voltage drop in the multiphase system in the absence of said auxiliary voltage source means.
Claim 6
Dependent Claim
15 words
A phase converter as in claim 1, wherein said rotor means includes an exciter winding.
Claim 7
Dependent Claim
23 words
A converter as in claim 1, wherein said voltage source means includes a single-phase synchronous machine driven in synchronism with the three-phase lines.
Claim 8
Dependent Claim
23 words
A converter as in claim 5, wherein said voltage source means includes a single-phase synchronous machine driven in synchronism with the three-phase lines.
Claim 9
Dependent Claim
20 words
A converter as in claim 7, wherein the synchronous machine is excited with two currents 90* displaced from each other.
Claim 10
Dependent Claim
25 words
A phase converter as in claim 7, wherein said stator means includes a DC exciter winding, and said synchronous machine is driven by said rotor.
Claim 11
Dependent Claim
18 words
A converter as in claim 1, wherein said voltage source means includes at least one single-phase induction regulator.
Claim 12
Dependent Claim
18 words
A converter as in claim 5, wherein said voltage source means includes at least one single-phase induction regulator.
Claim 13
Dependent Claim
15 words
A converter as in claim 1, wherein said voltage source means includes an AC converter.
Claim 14
Dependent Claim
17 words
A phase converter as in claim 12, wherein said voltage source means includes an intermediate circuit converter.
Claim 15
Dependent Claim
15 words
A converter as in claim 5, wherein said voltage source means includes an AC converter.
Claim 16
Dependent Claim
16 words
A converter as in claim 5, wherein said voltage source means includes an intermediate circuit cOnverter.
Claim 17
Dependent Claim
15 words
A converter as in claim 1, wherein said voltage source means precludes two regulatable components.
Claim 18
Dependent Claim
14 words
A converter as in claim 16, wherein said components are perpendicular to each other.
Claim 19
Dependent Claim
32 words
A converter as in claim 16, wherein the components are regulated so that the resulting auxiliary voltage is in phase with the unsymmetrical voltage drop, and of equal size and opposite direction.
Claim 20
Dependent Claim
24 words
A converter as in claim 17, wherein the two components are controlled by the real and reactive current components of one of said systems.
Claim 21
Dependent Claim
19 words
A converter as in claim 19, wherein the real and reactive current components are derived from the multiphase lines.
Claim 22
Dependent Claim
21 words
A converter as in claim 1, wherein said stator means includes a stator winding galvanically linking the multiphase and single-phase systems.
Claim 23
Dependent Claim
15 words
A converter as in claim 21, wherein the leakage in the stator winding is low.
Claim 24
Dependent Claim
49 words
A phase converter as in claim 21, wherein the single-phase system includes two single-phase lines, one of said single-phase lines being common with one of the lines of said multiphase system, said voltage source means being connected between one of said terminals and the common one of said lines.
Claim 25
Dependent Claim
48 words
A converter as in claim 4, wherein the single-phase system includes two single-phase lines, one of said single-phase lines being common with one of the lines of said multiphase system, said voltage source means being connected between one of said terminals and the common one of said lines.
Claim 26
Dependent Claim
48 words
A converter as in claim 22, wherein the single-phase system includes two single-phase lines, one of said single-phase lines being common with one of the lines of said multiphase system, said voltage source means being connected between one of said terminals and the common one of said lines.
Claim 27
Dependent Claim
80 words
A converter as in claim 21, wherein said stator means includes a terminal connected to said single-phase line, and wherein the no-load and load voltage difference at a terminal to which the single-phase system is not connected jointly with the multiphase system is determined by comparison with a point at a fixed voltage potential, said voltage source means including means for introducing the no-load and voltage difference as a proportionality factor for establishing the nominal value of the auxiliary voltage.
Claim 28
Dependent Claim
28 words
A converter as in claim 1, wherein said voltage source means includes regulating means for rotating the voltage relative to the lines for regulating the transmitted real power.
Claim 29
Dependent Claim
18 words
A converter as in claim 27, wherein said regulating means includes a transverse transformer for rotating the voltage.
Claim 30
Dependent Claim
16 words
A converter as in claim 27, wherein said stator winding includes taps for rotating the voltage.
Claim 31
Dependent Claim
18 words
A converter as in claim 27, wherein said voltage source means includes induction regulators for rotating the voltage.
Claim 32
Dependent Claim
20 words
A converter as in claim 15, wherein said regulating means includes a multiphase synchronous machine for supplying an auxiliary voltage.
Claim 33
Dependent Claim
30 words
A converter as in claim 1, wherein the lines of the multiphase system carry multiphase current having inverse components, said voltage source means including means for regulating the inverse components.
Claim 34
Dependent Claim
19 words
A converter as in claim 32, wherein said voltage source means includes static means for rotating the multiphase voltage.
Claim 35
Dependent Claim
30 words
A converter as in claim 1, wherein said voltage source means includes means for varying the transmission ratio of the two systems so as to regulate the reactive power transmitted.
Claim 36
Dependent Claim
22 words
A converter as in claim 34, wherein said voltage source means includes a longitudinal transformer for varying the voltages of the system.
Claim 37
Dependent Claim
21 words
A converter as in claim 34, wherein said voltage source means includes induction regulators for varying the voltage at the lines.
Claim 38
Dependent Claim
21 words
A converter as in claim 34, wherein said voltage source means includes a multiphase synchronous machine for varying the multiphase voltage.
Claim 39
Dependent Claim
22 words
A converter as in claim 34, wherein said voltage source meAns includes a static arrangement for varying the voltage along the lines.
Claim 40
Dependent Claim
20 words
A converter as in claim 5, wherein said exciter means is regulated for varying the reactive power in the lines.
Claim 41
Dependent Claim
16 words
A converter as in claim 1, wherein the squirrel cage winding is provided with Roebel rods.
Claim 42
Dependent Claim
29 words
A converter as in claim 1, wherein the stator winding is constructed to cause the synchronous rotary flows of the multiphase and single-phase systems to compensate for each other.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |