US4164016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current sensing system
Assignee: Exide Electronics Corp
•
Filing: 1978-11-13
•
Granted: 1979-08-07
•
Expires: 1998-11-13
Abstract
Abstract A circuit for sensing the current applied to a load in power supplies, inverters, and other power conversion equipment and similar systems wherein the voltage between the center tap of the transformer secondary winding and the junction of two resistors connected across the secondary winding in series is sensed. The control circuit for the electronic system adjusts the overall system operation to obtain the desired volt-ampere output in response to this voltage level.
Inventors
- 👤 Walter F. Schuchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:40
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/155; H02M7/1555
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
106 words
In a system receiving a power signal through a transformer having a center tapped secondary winding and having control means for adjusting the power signal to produce an output having a predetermined output current characteristic, a current sensing system comprising: (a) two resistors connected in series across the secondary winding; (b) a capacitor connected between the common junction of the resistors and the center tapped terminal; and (c) means for detecting the voltage between the common junction of the impedances and the center tap, said voltage being provided to said control means so that the system output current is varied until it reaches a predetermined level.
Claim 2
Dependent Claim
106 words
In a system receiving a power signal through a transformer having a center tapped secondary winding and having control means for adjusting the power signal to produce an output having a predetermined output current characteristic, a current sensing system comprising: (a) two resistors connected in series across the secondary winding; (b) a capacitor connected between the common junction of the resistors and the center tapped terminal; and (c) means for detecting the voltage between the common junction of the impedances and the center tap, said voltage being provided to said control means so that the system output current is varied until it reaches a predetermined level.
Claim 3
Dependent Claim
110 words
In a system having means for changing a power signal received from a full wave center tapped inductor to provide an output across a load having a predetermined output current characteristic, a current sensing system comprising: (a) two resistors connected in series across the full wave center tapped inductor; (b) capacitance means are connected between the common junction of the resistors and the center tapped terminal; (c) means for detecting the voltage between the common junction of the two resistors and the center tapped terminal; and (d) means for adjusting the output current in response to the detected voltage so that said output current is maintained at a predetermined level.
Claim 4
Dependent Claim
110 words
In a system having means for changing a power signal received from a full wave center tapped inductor to provide an output across a load having a predetermined output current characteristic, a current sensing system comprising: (a) two resistors connected in series across the full wave center tapped inductor; (b) capacitance means are connected between the common junction of the resistors and the center tapped terminal; (c) means for detecting the voltage between the common junction of the two resistors and the center tapped terminal; and (d) means for adjusting the output current in response to the detected voltage so that said output current is maintained at a predetermined level.
Claim 5
Dependent Claim
130 words
In a system for converting AC power received through a transformer having a center tapped secondary winding, a plurality of switching means connected between the secondary winding and the load, and means for actuating the switch means in relation to the other so that a DC signal is provided to the load; a current sensing system comprising: (a) two resistors connected in series across the full wave center tapped winding; (b) capacitance means connected between the common junction of the resistors and the center tapped terminal; (c) means for detecting the voltage between the common junction of the two resistors and the center tap terminal; and (d) means for adjusting the output current in response to the detected voltage so that said output current is maintained at a predetermined level.
Claim 6
Dependent Claim
130 words
In a system for converting AC power received through a transformer having a center tapped secondary winding, a plurality of switching means connected between the secondary winding and the load, and means for actuating the switch means in relation to the other so that a DC signal is provided to the load; a current sensing system comprising: (a) two resistors connected in series across the full wave center tapped winding; (b) capacitance means connected between the common junction of the resistors and the center tapped terminal; (c) means for detecting the voltage between the common junction of the two resistors and the center tap terminal; and (d) means for adjusting the output current in response to the detected voltage so that said output current is maintained at a predetermined level.
Claim 7
Independent Claim
118 words
A method of providing DC power to a load resistance using a system having an isolation transformer having a center tapped secondary winding connected to the load resistance through a plurality of SCR's, with the other load resistance terminal connected to the transformer center tap; two resistors connected in series across the center tapped secondary winding; and capacitor means connected between the common junction of the resistors and the center tapped terminal; said method comprising: (a) monitoring the voltage between the center tap and the common junction between said two resistors; and (b) controlling the firing of the SCR's in response to said voltage to produce an input signal to the load resistance having a predetermined current characteristic.
Claim 8
Independent Claim
118 words
A method of providing DC power to a load resistance using a system having an isolation transformer having a center tapped secondary winding connected to the load resistance through a plurality of SCR's, with the other load resistance terminal connected to the transformer center tap; two resistors connected in series across the center tapped secondary winding; and capacitor means connected between the common junction of the resistors and the center tapped terminal; said method comprising: (a) monitoring the voltage between the center tap and the common junction between said two resistors; and (b) controlling the firing of the SCR's in response to said voltage to produce an input signal to the load resistance having a predetermined current characteristic.
References Cited (Backward Citations)
US1857174A
Cited
US1873652A
Cited
US1968632A
Cited
US2292397A
Cited
US2569698A
Cited
US3362900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-08-06 | 1983-02-05 | 1983-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-06 | 1987-02-05 | 1987-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-06 | 1991-02-05 | 1991-08-07 | $7700.00 | Window Closed / Lapsed |