US3902109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the regulation of a converter over a full range of operation including operation in a pulsating mode
Assignee: Siemens AG
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Filing: 1974-07-25
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Granted: 1975-08-26
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Expires: 1994-07-25
Abstract
Abstract A device permitting optimization of a current controller for a converter such that it operates equally well both in an operating range where a continuous current is provided and an intermittent current with gaps between current pulses is provided, in which a time constant element and a proportional element with variable gain are inserted in the control loop and means for activating these elements when operating in a mode where gaps are present between pulses provided.
Inventors
- 👤 Winfried Speth
- 👤 Klaus Bohm
- 👤 Walter Dreiseitl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:46
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/155; H02M7/162; H02M7/1623; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/292; H02P7/293
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
61 words
In a converter having current dependent control loop parameter variations and including a current controller, a device for gap current adapted current control comprising: a. a proportional element having variable gain and a delay element inserted in the control loop; and b. means for varying the gain of said proportional element and for activating said delay element in the gapping range.
Claim 2
Dependent Claim
61 words
In a converter having current dependent control loop parameter variations and including a current controller, a device for gap current adapted current control comprising: a. a proportional element having variable gain and a delay element inserted in the control loop; and b. means for varying the gain of said proportional element and for activating said delay element in the gapping range.
Claim 3
Dependent Claim
44 words
A device according to claim 1 wherein said variable gain proportional element comprises a multiplier and wherein said means for varying said gain comprise means for providing a multiplification factor to said multiplier which multiplication factor is dependent on the duration of current pauses.
Claim 4
Dependent Claim
49 words
A device according to claim 2 wherein said means for providing a multiplication factor comprise: a. means for developing an analog output signal proportional to the current pause length; and b. a function generator having said analog output signal as an input and providing its output to said multiplier.
Claim 5
Dependent Claim
14 words
A device according to claim 3 wherein said function generator approximately simulates the function
Claim 6
Dependent Claim
60 words
A device according to claim 3 wherein said means for providing an analog output signal comprise: a. an integrator having as an input a constant voltage; b. storage means providing said analog output signal; and c. means for transferring the output of said integrator to said storage and for resetting said integrator at the beginning of each current conducting interval.
Claim 7
Dependent Claim
56 words
A device according to claim 5 wherein said means for resetting said integrator and providing said integrator output to said storage means comprise: a. at least first and second electronic switches; and b. means having as an input a signal proportional to actual current and providing its output as a control input to said electronic switches.
Claim 8
Dependent Claim
49 words
A device according to claim 1 wherein said delay element comprises: a. a proportional amplifier having a negative feedback through a feedback resistor; b. a feedback capacitor; and c. a third electronic switch for coupling said capacitor in and out of a location in parallel with said feedback resistor.
Claim 9
Dependent Claim
82 words
A device according to claim 7 wherein said means for activating said delay element comprise means for activating said third electronic switch comprising: A. first and second monostable multi-vibrators having a relaxation time greater than the cycle time of the pulse frequency; b. an Or gate having as inputs the output of said monostables and havings its output coupled to said third electronic switch; and c. means to alternately trigger said first and second monostables at the end of each current pulse.
Claim 10
Dependent Claim
30 words
A device according to claim 1 wherein the time constant of said delay element is at most equal to the time constant of the load circuit supplied by the converter.
Claim 11
Dependent Claim
25 words
A device according to claim 1 wherein said proportional element having variable gain comprises an amplifier and means to change the gain of said amplifier.
Claim 12
Dependent Claim
124 words
A device according to claim 10 wherein said variable amplifier comprises a first amplifier having a first negative feedback resistor, said means for changing gain comprise a second feedback resistor and a first electronic switch for selectively connecting said second resistor in parallel with said first resistor and wherein said delay element comprises a second amplifier having a third negative feedback resistor and having a capacitor and a second electronic switch in series in parallel to said third resistor and wherein said means for activating said time delay element and varying said gain comprise means having as an input a signal proportional to current and providing its output to control said electronic switches in dependence on the presence or absence of a current signal.
Claim 13
Dependent Claim
43 words
A device according to claim 11 wherein a further electronic switch is provided coupling one electrode of said capacitor to ground, said switch being coupled to said means to control so as to be turned on when said second switch is turned off.
Claim 14
Dependent Claim
30 words
A device according to claim 11 wherein the current controller comprises a proportional integral controller and wherein said controller is coupled between said variable gain amplifier and said delay element.
Claim 15
Dependent Claim
30 words
A device according to claim 13 and further including a smoothing element coupling said signal proportional to the actual value of the current as an input to said first amplifier.
Claim 16
Dependent Claim
14 words
A device according to claim 11 wherein said electronic switches are field effect transistors.
Claim 17
Dependent Claim
39 words
A device according to claim 10 wherein said means for changing gain comprise means to cause said amplifier to have a gain during current pauses which is one order of magnitude greater than the gain during current conducting intervals.
Claim 18
Dependent Claim
28 words
A device according to claim 10 wherein said delay element has a time constant approximately equal to three times the period of the pulse frequency of the current.
Claim 19
Dependent Claim
137 words
A device according to claim 1 wherein said delay element comprises: a. a proportional amplifier; b. a negative feedback capacitor coupled to said amplifier; c. a first negative feedback resistor coupled in parallel with said capacitor; d. a first input resistor coupling the input of said amplifier to its inverting terminal; e. a first series circuit comprising an electronic switch and a resistor in parallel with said negative feedback resistor; f. a second series combination of a resistor and electronic switch in parallel with said input resistor; and g. wherein the resistors in said first and second series circuits are proportional to the resistors which they parallel and are selected to provide a time constant for the delay element which is negligibly small when said resistors are coupled in parallel by activation of their associated electronic switches.
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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |