US5075610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switched reluctance motor control circuit with energy recovery capability
Assignee: Honeywell Inc
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Filing: 1991-03-28
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Granted: 1991-12-24
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Expires: 2011-03-28
Abstract
Abstract A control circuit for a switched reluctance motor is provided with a connection between a second end of each stator winding and a first end of an associated other winding. The purpose of this connection is to permit the flow of current from a phase winding to an energy storage device following the disconnection of the phase winding from a primary power source. Because of the inductive characteristic of the phase windings in a switched reluctance motor, the current flow through the winding does not immediately cease when the winding is disconnected from the power source. Instead, the inductive characteristic resists the immediate cessation of current flow following the opening of an associated switch. That continued current flow is directed to an energy storage device, such as a capacitor, for the purpose of raising the voltage at the first, or input, end of another stator winding. This increased voltage potential at the first end of the other stator winding assists the initiation of current flow through that stator winding when its switch is later closed for the purpose of energizing the winding. Alternative embodiments of the present invention include the directing of the continued current flow to more than one other winding to permit bi-directional rotation of the motor rotor.
Inventors
- 👤 William A. Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:41
CPC Classifications
H; H02; H02P; H02P25/00; H02P25/02; H02P25/08; H02P25/086; H02P25/089
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
161 words
A control circuit for a switched reluctance dynamoelectric machine, comprising: first means for connecting a first end of a first stator winding in electrical communication with a voltage source; second means for connecting a first end of a second stator winding in electrical communication with said voltage source; first means for alternately connecting and disconnecting a second end of said first stator winding to a ground potential; second means for alternatively connecting and disconnecting a second end of said second stator winding to said ground potential; first means for conducting an electrical current from said second end of said first stator winding to said first end of said second stator winding, said first conducting means providing continuous electrical communication between said second end of said first stator winding and said first end of said second stator winding; and first means for storing a voltage potential at a circuit point in electrical communication with said first end of said second stator winding.
Claim 2
Dependent Claim
161 words
A control circuit for a switched reluctance dynamoelectric machine, comprising: first means for connecting a first end of a first stator winding in electrical communication with a voltage source; second means for connecting a first end of a second stator winding in electrical communication with said voltage source; first means for alternately connecting and disconnecting a second end of said first stator winding to a ground potential; second means for alternatively connecting and disconnecting a second end of said second stator winding to said ground potential; first means for conducting an electrical current from said second end of said first stator winding to said first end of said second stator winding, said first conducting means providing continuous electrical communication between said second end of said first stator winding and said first end of said second stator winding; and first means for storing a voltage potential at a circuit point in electrical communication with said first end of said second stator winding.
Claim 3
Dependent Claim
51 words
The control circuit of claim 1, further comprising: a first Zener diode connected in electrical communication between said first end of said first stator winding and said voltage source; and a second Zener diode connected in electrical communication between said first end of said second stator winding and said voltage source.
Claim 4
Dependent Claim
38 words
The control circuit of claim 1, further comprising: a first diode connected in electrical communication with said first conducting means between said second end of said first stator winding and said first end of said second stator winding.
Claim 5
Dependent Claim
95 words
The control circuit of claim 1, further comprising: third means for connecting a first end of a third stator winding in electrical communication with said voltage source; third means for alternately connecting and disconnecting a second end of said third stator winding to said ground potential; second means for conducting an electrical current from said second end of said second stator winding to said first end of said third stator winding; and second means for storing a voltage potential at a circuit point in electrical communication with said first end of said third stator winding.
Claim 6
Dependent Claim
57 words
The control circuit of claim 4, further comprising: third means for conducting an electrical current from said second end of said third stator winding to said first end of said first stator winding; and third means for storing a voltage potential at a circuit point in electrical communication with said first end of said first stator winding.
Claim 7
Dependent Claim
29 words
The control circuit of claim 4, further comprising: a third Zener diode connected in electrical communication between said first end of said third stator winding and said voltage source.
Claim 8
Dependent Claim
38 words
The control circuit of claim 4, further comprising: a second diode connected in electrical communication with said second conducting means between said second end of said second stator winding and said first end of said third stator winding.
Claim 9
Dependent Claim
38 words
The control circuit of claim 5, further comprising: a third diode connected in electrical communication with said third conducting means between said second end of said third stator winding and said first end of said first stator winding.
Claim 10
Dependent Claim
163 words
A circuit for controlling a switched reluctance motor, comprising: a first connection point, said first connection point being connected to a first terminus of a first stator winding; a second connection point, said second connection point being connectable to a second terminus of said first stator winding; a third connection point, said third connection point being connectable to a first terminus of a second stator winding; a fourth connection point, said four connection point being connectable to a second terminus of said second stator winding; a first means for connecting said first and third connection points to a voltage source; second means for connecting and disconnecting said second connection point with said ground potential; and third means for connecting and disconnecting said fourth connection point with said ground potential; and means for conducting an electrical current from said second connection point to said third connection point, said conducting means providing continuous electrical communication between said second connection point and said third connection point.
Claim 11
Dependent Claim
163 words
A circuit for controlling a switched reluctance motor, comprising: a first connection point, said first connection point being connected to a first terminus of a first stator winding; a second connection point, said second connection point being connectable to a second terminus of said first stator winding; a third connection point, said third connection point being connectable to a first terminus of a second stator winding; a fourth connection point, said four connection point being connectable to a second terminus of said second stator winding; a first means for connecting said first and third connection points to a voltage source; second means for connecting and disconnecting said second connection point with said ground potential; and third means for connecting and disconnecting said fourth connection point with said ground potential; and means for conducting an electrical current from said second connection point to said third connection point, said conducting means providing continuous electrical communication between said second connection point and said third connection point.
Claim 12
Dependent Claim
23 words
The circuit of claim 9, further comprising: means for storing a voltage potential, said storing means being connected to said third connection point.
Claim 13
Dependent Claim
36 words
The circuit of claim 10, further comprising: a first Zener diode connected between said first connection point and said voltage source; and a second Zener diode connected between said third connection point and said voltage source.
Claim 14
Dependent Claim
86 words
The circuit of claim 11, further comprising: a fifth connection point, said fifth connection point being connectable to a first terminus of a third stator winding; a sixth connection point, said sixth connection point being connectable to a second terminus of said third stator winding; fourth means for connecting said fifth connector point to said voltage source; fifth means for connecting and disconnecting said sixth connection point with said ground potential; means for conducting an electrical from said fourth connection point to said fifth connection point.
Claim 15
Independent Claim
152 words
A method for controlling a switched reluctance dynamoelectric machine, comprising: connecting a first end of a first stator winding in electrical communication with a voltage source; connecting a first end of a second stator winding in electrical communication with said voltage source; alternately connecting and disconnecting a second end of said first stator winding to a ground potential; alternatively connecting and disconnecting a second end of said second stator winding to said ground potential; conducting an electrical current directly from said second end of said first stator winding to said first end of said second stator winding by providing, in parallel with said voltage source, a continuous connection between said second end of said first stator winding and said first end of said second stator winding; and storing a voltage potential resulting from said electrical current at a circuit point in electrical communication with said first end of said second stator winding.
Claim 16
Independent Claim
152 words
A method for controlling a switched reluctance dynamoelectric machine, comprising: connecting a first end of a first stator winding in electrical communication with a voltage source; connecting a first end of a second stator winding in electrical communication with said voltage source; alternately connecting and disconnecting a second end of said first stator winding to a ground potential; alternatively connecting and disconnecting a second end of said second stator winding to said ground potential; conducting an electrical current directly from said second end of said first stator winding to said first end of said second stator winding by providing, in parallel with said voltage source, a continuous connection between said second end of said first stator winding and said first end of said second stator winding; and storing a voltage potential resulting from said electrical current at a circuit point in electrical communication with said first end of said second stator winding.
Claim 17
Dependent Claim
82 words
The method of claim 13, further comprising: connecting a first end of a third stator winding in electrical communication with said voltage source; alternately connecting and disconnecting a second end of said third stator winding to said ground potential; conducing an electrical current from said second end of said second stator winding to said first end of said third stator winding; and storing a voltage potential at a circuit point in electrical communication with said first end of said third stator winding.
Claim 18
Dependent Claim
50 words
The method of claim 14, further comprising: conducting an electrical current from said second end of said third stator winding to said first end of said first stator winding; and storing a voltage potential at a circuit point in electrical communication with said first end of said first stator winding.
References Cited (Backward Citations)
US3956678A
Cited
US4387326A
Cited
US4520302A
Cited
US4684867A
Cited
US4943760A
Cited
US4611157A
Cited
US4868478A
Cited
US4772839A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-23 | 1995-06-24 | 1995-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-23 | 1999-06-24 | 1999-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-23 | 2003-06-24 | 2003-12-24 | $7700.00 | Window Closed / Lapsed |