US4463302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual power, constant speed electric motor system
Assignee: Westinghouse Electric Corp
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Filing: 1983-03-28
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Granted: 1984-07-31
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Expires: 2003-03-28
Abstract
Abstract A dual capacity permanent split capacitor electric motor system is provided with a stator having main and auxiliary windings. The main stator winding includes two winding sections which are connected in parallel with each other and across a pair of line terminals while the auxiliary winding is connected in series with a capacitor to form a circuit branch which is connected between the line terminals for operation at a first output power level. Switching means are provided to reconnect the main stator winding sections in series with each other and in series with a second capacitor to form a circuit branch which is connected between the line terminals while the stator auxiliary winding is connected directly between the line terminals for operation at a second output power level. Automatic rotation reversal occurs when the motor switches from the first to the second output power level.
Inventors
- 👤 Herbert S. Kirschbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:32
CPC Classifications
H; H02; H02P; H02P3/00; H02P3/06; H02P3/18; H02K; H02K3/00; H02K3/04; H02K3/28; H02P25/00; H02P25/16; H02P25/18; H02P3/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
185 words
An electric motor system comprising: a pair of line terminals for connection to a power source; a first stator winding including two winding sections; means for connecting said two winding sections of said first stator winding in parallel with each other and between said line terminals for motor operation at a first output power level; a second stator winding; a first capacitor connected in series with said second stator winding to form a first circuit branch; means for connecting said first circuit branch between said line terminals for motor operation at said first output power level; means for connecting said second stator winding between said line terminals for motor operation at a second output power level; a second capacitor; means for connecting said two winding sections of said first stator winding in series with each other and in series with said second capacitor to form a second circuit branch; and means for connecting said second circuit branch between said line terminals for motor operation at said second output power level, wherein said first and second output power levels occur at substantially the same motor speed.
Claim 2
Dependent Claim
185 words
An electric motor system comprising: a pair of line terminals for connection to a power source; a first stator winding including two winding sections; means for connecting said two winding sections of said first stator winding in parallel with each other and between said line terminals for motor operation at a first output power level; a second stator winding; a first capacitor connected in series with said second stator winding to form a first circuit branch; means for connecting said first circuit branch between said line terminals for motor operation at said first output power level; means for connecting said second stator winding between said line terminals for motor operation at a second output power level; a second capacitor; means for connecting said two winding sections of said first stator winding in series with each other and in series with said second capacitor to form a second circuit branch; and means for connecting said second circuit branch between said line terminals for motor operation at said second output power level, wherein said first and second output power levels occur at substantially the same motor speed.
Claim 3
Dependent Claim
40 words
An electric motor system as recited in claim 1, wherein the ratio of the number of turns in said first stator winding to the number of turns in said second stator winding is greater than one but less than two.
Claim 4
Dependent Claim
23 words
An electric motor system as recited in claim 1, wherein said first and second stator windings comprise: copper conductors of substantially equal weights.
Claim 5
Dependent Claim
35 words
An electric motor system as recited in claim 1, wherein the ratio of the number of turns in said first stator winding to the number of turns in said second stator winding is approximately 1.33.
Claim 6
Dependent Claim
32 words
An electric motor system as recited in claim 1, further comprising: means for connecting said second capacitor in parallel with said first capacitor for motor operation at said first output power level.
Claim 7
Dependent Claim
43 words
An electric motor system as recited in claim 1, wherein the direction of rotation of the motor, when operated at said first output power level, is opposite to the direction of rotation of the motor, when operated at said second output power level.
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) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |