US4529927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the control of a switched power regulator
Assignee: European Space Agency
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Filing: 1983-10-07
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Granted: 1985-07-16
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Expires: 2003-10-07
Abstract
Abstract A controller apparatus comprising a phase-locked loop circuit which includes a phase comparator and a low-pass filter connected to accept a signal representing the switching frequency of the apparatus and an external frequency signal to produce a control signal for a controllable switch serving to vary the threshold levels of a reference signal, said control signal being a function of the phase difference between the input signals. The hysteresis of the apparatus is thereby changed over a few synchronization cycles in order to pull the controller into synchronization.
Inventors
- 👤 Dermot O'Sullivan
- 👤 Jan Schreuders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:32
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/145; H02M3/155; H02M3/156; H02M3/1563; H03; H03F; H03F2200/00; H03F2200/351
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
328 words
In an apparatus for the control of a switched power regulator including an inductor through which an electric current flows, and a regulating switch arranged for being switched between a first non-conducting logic state and a second conducting logic state in response to a drive signal with a predetermined time elapsing between said first and second logic states, an electric controller operating in a conductance control mode, comprising: reference signal generator means (1,10) responsive to a command signal (Vc) for generating a reference signal (V 1 ) the amplitude of which is a function of the command signal, said reference signal having an upper threshold level and a lower threshold level; current sensor means (2) connected to sense said electric current (I) and to generate a sensor signal (V 2 ) representing said current; comparator means (20) connected to compare the sensor signal to the reference signal for producing said drive signal for the regulating switch (Qo), said drive signal (V D ) having a first state when the increasing sensor signal is lower than the upper threshold level of the reference signal and a second state when the decreasing sensor signal is greater than the lower threshold level of the reference signal; means (30) for switching the reference signal from one level to the other in response to the drive signal swinging from one state to the other; controllable switching means (40) responsive to a control signal (Vx) to vary the threshold levels of the reference signal, thereby to vary the time elapsing between said first and second logic states of the regulating switch; phase-locked loop circuit means (7) comprising phase comparator and low-pass filter means connected to accept a signal (f LC3 ) representing the switching frequency of the apparatus and an external frequency signal (f S ) and to produce a control signal (Vx) for said controllable switching means (40), said control signal being a function of the phase difference between the input signals thereto.
Claim 2
Dependent Claim
328 words
In an apparatus for the control of a switched power regulator including an inductor through which an electric current flows, and a regulating switch arranged for being switched between a first non-conducting logic state and a second conducting logic state in response to a drive signal with a predetermined time elapsing between said first and second logic states, an electric controller operating in a conductance control mode, comprising: reference signal generator means (1,10) responsive to a command signal (Vc) for generating a reference signal (V 1 ) the amplitude of which is a function of the command signal, said reference signal having an upper threshold level and a lower threshold level; current sensor means (2) connected to sense said electric current (I) and to generate a sensor signal (V 2 ) representing said current; comparator means (20) connected to compare the sensor signal to the reference signal for producing said drive signal for the regulating switch (Qo), said drive signal (V D ) having a first state when the increasing sensor signal is lower than the upper threshold level of the reference signal and a second state when the decreasing sensor signal is greater than the lower threshold level of the reference signal; means (30) for switching the reference signal from one level to the other in response to the drive signal swinging from one state to the other; controllable switching means (40) responsive to a control signal (Vx) to vary the threshold levels of the reference signal, thereby to vary the time elapsing between said first and second logic states of the regulating switch; phase-locked loop circuit means (7) comprising phase comparator and low-pass filter means connected to accept a signal (f LC3 ) representing the switching frequency of the apparatus and an external frequency signal (f S ) and to produce a control signal (Vx) for said controllable switching means (40), said control signal being a function of the phase difference between the input signals thereto.
Claim 3
Dependent Claim
37 words
Apparatus according to claim 1, wherein the controllable switching means (40) is a switch connected in series with the means (30) for switching the reference signal, and having a control input for accepting said control signal (Vx).
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) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |