Patent US3758837A successfully refreshed from Google Patents.
US3758837A
Expired / Lapsed
US
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Circuit arrangement for infinite speed regulation of induction motors
Assignee: Individual
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Filing: 1972-04-14
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Granted: 1973-09-11
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Expires: 1992-04-14
Abstract
Abstract A circuit arrangement for the infinite speed regulation of an induction motor, said induction motor comprising a stator having a pair of windings. One of the windings of the stator is connected across the entire voltage supply source. The circuit arrangement comprises a control circuit branch embodying a capacitor bridging the pair of stator windings and a series circuit arrangement composed of a rectifier means and a resistance connected in parallel to at least one of the stator windings.
Inventors
- 👤 S Stauber
- 👤 N Giger
- 👤 K Schaeffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:40
CPC Classifications
H; H02; H02P; H02P23/00; H02P23/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
86 words
A circuit arrangement for the infinite speed regulation of an induction motor comprising a stator having a pair of windings, a voltage supply source, one of the windings of said stator being connected across the entire voltage supply source, said circuit arrangement comprising a control circuit branch embodying a first parallel branch containing only a capacitor bridging said pair of windings and a second parallel branch comprising a series circuit arrangement composed of a rectifier means and a resistance connected in parallel to said stator windings.
Claim 2
Dependent Claim
86 words
A circuit arrangement for the infinite speed regulation of an induction motor comprising a stator having a pair of windings, a voltage supply source, one of the windings of said stator being connected across the entire voltage supply source, said circuit arrangement comprising a control circuit branch embodying a first parallel branch containing only a capacitor bridging said pair of windings and a second parallel branch comprising a series circuit arrangement composed of a rectifier means and a resistance connected in parallel to said stator windings.
Claim 3
Dependent Claim
71 words
The circuit arrangement as defined in claim 1, wherein one of the pair of windings defines a main winding and the other of said pair of windings an auxiliary winding, said entire voltage supply source being connected across said main winding and maximum torque being applied to the rotor of the induction motor, said control circuit branch serving to vary the rotational speed of the rotor without changing said maximum torque.
Claim 4
Dependent Claim
30 words
The circuit arrangement as defined in claim 2, wherein said control circuit branch produces a periodic phase displacement between the current flowing through the main winding and the auxiliary winding.
Claim 5
Dependent Claim
23 words
The circuit arrangement as defined in claim 1, wherein said rectifier means is arranged in parallel with said capacitor and comprises a diode.
Claim 6
Dependent Claim
21 words
The circuit arrangement as defined in claim 1, wherein said resistance is arranged in parallel with said capacitor and is variable.
Claim 7
Dependent Claim
15 words
The circuit arrangement as defined in claim 5, wherein said variable resistance is temperature responsive.
Claim 8
Dependent Claim
15 words
The circuit arrangement as defined in claim 5, wherein said variable resistance is pressure responsive.
Claim 9
Dependent Claim
24 words
The circuit arrangement as defined in claim 5, wherein said variable resistance is coupled in contRol circuit containing a throughflow heater and conveying pump.
Claim 10
Dependent Claim
27 words
The circuit arrangement as defined in claim 1, further including switch means for switching-in and switching-out said series circuit arrangement connected in parallel with said stator windings.
Claim 11
Dependent Claim
32 words
The circuit arrangement as defined in claim 1, wherein said rectifier means is a diode and said resistance is variable, and wherein said series circuit arrangement is provided with an additional winding.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |