Patent JPS5540656A successfully refreshed from Google Patents.
Patent CA1097403A successfully refreshed from Google Patents.
CA1097403A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Alternating current variable speed motor-driven compressor system
Assignee: Individual
•
Filing: 1978-04-13
•
Granted: 1981-03-10
•
Expires: 1998-04-13
Abstract
Abstract ABSTRACT OF THE DISCLOSURE An alternating current motor-driven compressor for use in a refrigeration, air conditioning and/or heating system wherein the speed of the compressor is varied as a function of the frequency of the a.c. applied thereto, the a.c. power being generated in main alternator having an independent d.c. field supply providing limited increased field current during starting and predetermined field current during normal operation such that the output power from the alternator may be selected to accommodate the electrical demands thereon.
Inventors
- 👤 Gary G. Doucet
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-05 05:10
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/32; B60H1/3204; B60H1/3222; H; H02; H02P; H02P9/00; H02P9/44
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
130 words
An alternator-motor combination for driving at least a compressor, said combination comprising: i) an alternator having electrical output terminals and a field winding having separate field terminals, said alternator having a substantially constant voltage-to-frequency relationship; (ii) driving means for driving said alternator that may vary in driving speed, (iii) an AC motor in driving engagement with said compressor, and (iv) field supply means for supplying direct field current to said separate field terminals, said field supply means providing: (a) a predetermined starting field current which is substantially constant and whose value is selected to reduce the output voltage of said alternator during starting, and (b) a plurality of predetermined running field currents, each of one of said plurality of field currents provided a different selected output power from said alternator.
Claim 2
Dependent Claim
130 words
An alternator-motor combination for driving at least a compressor, said combination comprising: i) an alternator having electrical output terminals and a field winding having separate field terminals, said alternator having a substantially constant voltage-to-frequency relationship; (ii) driving means for driving said alternator that may vary in driving speed, (iii) an AC motor in driving engagement with said compressor, and (iv) field supply means for supplying direct field current to said separate field terminals, said field supply means providing: (a) a predetermined starting field current which is substantially constant and whose value is selected to reduce the output voltage of said alternator during starting, and (b) a plurality of predetermined running field currents, each of one of said plurality of field currents provided a different selected output power from said alternator.
Claim 3
Dependent Claim
30 words
An alternator-motor combination as in Claim 1 wherein said plurality of predetermined and substantially constant field currents is obtained from an independent constant voltage d.c. source via voltage dropping means.
Claim 4
Dependent Claim
16 words
An alternator-motor combination as in Claim 1 wherein said voltage dropping means is a tapped resistor.
Claim 5
Dependent Claim
17 words
An alternator-motor combination as in Claim 3 wherein said voltage dropping means is a solid state device.
Claim 6
Dependent Claim
27 words
An alternator-motor combination as in Claim 1 wherein said field supply means is electrically connected via selected pairs of a plurality of taps on said field winding.
Claim 7
Dependent Claim
25 words
An alternator-motor combination as in Claim 2 wherein said independent constant d.c. voltage source is a voltage regulator associated with an auxiliary power generating means.
Claim 8
Dependent Claim
20 words
An alternator-motor combination as in Claim 6 where said auxiliary power generating means is an alternator and includes rectifying means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.