US3603853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for differential supercharger
Assignee: Aambeeld NV
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Filing: 1969-07-30
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Granted: 1971-09-07
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Expires: 1989-07-30
Abstract
Abstract An electrical control system for a differential supercharger is disclosed which includes a power generator for providing armature current to the supercharger motor, and a control circuit for providing the field flux to the power generator, the control circuit having a constant direct current source and a direct current control generator in opposition to the constant source. The control generator and power generator are driven by the engine with which the supercharger works. After a minimum engine speed is reached as the engine speed increases the power generator output current to the motor armature decreases resulting in a decrease in supercharging of the engine.
Inventors
- 👤 Anthony J R Mackay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:18
CPC Classifications
H; H02; H02P; H02P9/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
165 words
A control system adapted for use with a compressor and engine in order to energize the compressor in inverse proportion to the speed of the engine, the system including: an electric motor adapted to drive the compressor, a motor circuit for providing field flux for the motor, a primary generator for providing current to the motor armature, a primary generator field excitation circuit including a field coil, a direct current generator and a second direct current source working in opposition to the direct current generator with the resultant voltage being applied across the field coil, the voltage of the second direct current source being greater than the direct current generator for at least a major portion of the operating range of the control system, means for providing a field flux for the direct current generator, the primary and direct current generators being adapted to be driven by the engine whereby the current provided to the motor armature varies inversely with the speed of the engine.
Claim 2
Dependent Claim
165 words
A control system adapted for use with a compressor and engine in order to energize the compressor in inverse proportion to the speed of the engine, the system including: an electric motor adapted to drive the compressor, a motor circuit for providing field flux for the motor, a primary generator for providing current to the motor armature, a primary generator field excitation circuit including a field coil, a direct current generator and a second direct current source working in opposition to the direct current generator with the resultant voltage being applied across the field coil, the voltage of the second direct current source being greater than the direct current generator for at least a major portion of the operating range of the control system, means for providing a field flux for the direct current generator, the primary and direct current generators being adapted to be driven by the engine whereby the current provided to the motor armature varies inversely with the speed of the engine.
Claim 3
Dependent Claim
35 words
A control system as defined in claim 1 wherein the primary generator field excitation circuit includes gate means permitting current to flow only in the direction of flow produced by the second direct current source.
Claim 4
Dependent Claim
21 words
A control system as defined in claim 1 including means for varying the impedance of the primary generator field excitation circuit.
Claim 5
Dependent Claim
25 words
A control system as defined in claim 1 wherein the primary generator field excitation circuit includes a variable resistance for controlling the field excitation current.
Claim 6
Dependent Claim
28 words
A control system as defined in claim 1 wherein the primary generator field excitation circuit includes means for varying the voltage provided by the second direct current source.
Claim 7
Dependent Claim
28 words
A control system as defined in claim 4 wherein the primary generator field excitation circuit includes means for varying the voltage provided by the second direct current source.
Claim 8
Dependent Claim
163 words
An engine-supercharging control system comprising an engine, a compressor in airflow communication with the engine, an electric motor drivingly connected to the compressor, a motor circuit providing a field flux for the motor, a primary generator providing current to the armature of the motor, a primary generator field excitation circuit including a field coil, a direct current generator, a battery working in opposition to the direct current generator, with the resultant voltage being applied across the field coil, the battery voltage being not less than the output voltage of the direct current generator during the major portion of the operating range of the system, gate means for permitting cuRrent to flow in the primary generator field excitation circuit only in the direction of flow provided by the battery, means providing a field flux for the direct current generator, means connecting the engine to the primary and direct current generators whereby the current provided to the motor armature varies inversely with the engine speed.
Claim 9
Dependent Claim
163 words
An engine-supercharging control system comprising an engine, a compressor in airflow communication with the engine, an electric motor drivingly connected to the compressor, a motor circuit providing a field flux for the motor, a primary generator providing current to the armature of the motor, a primary generator field excitation circuit including a field coil, a direct current generator, a battery working in opposition to the direct current generator, with the resultant voltage being applied across the field coil, the battery voltage being not less than the output voltage of the direct current generator during the major portion of the operating range of the system, gate means for permitting cuRrent to flow in the primary generator field excitation circuit only in the direction of flow provided by the battery, means providing a field flux for the direct current generator, means connecting the engine to the primary and direct current generators whereby the current provided to the motor armature varies inversely with the engine speed.
Claim 10
Dependent Claim
27 words
A system as defined in claim 7 wherein the motor circuit and means for providing a field flux for the direct current generator provide constant field flux.
Claim 11
Dependent Claim
19 words
A system as defined in claim 7 including control means for varying the current flow through the field coil.
Claim 12
Dependent Claim
20 words
A system as defined in claim 7 including means for varying the impedance of the primary generator field excitation circuit.
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) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |