CA1167916A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Converter circuit employing pulse-width modulation
Assignee: Tektronix Inc
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Filing: 1980-08-26
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Granted: 1984-05-22
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Expires: 2000-08-26
Abstract
Abstract Abstract: A voltage conversion and regulation system and method of same utilizing pulse-width modulation to vary the periodic energization of a tuned circuit employed to drive a transformer and an associated rectifier. The tuned resonant circuit is periodically energized from a DC source at a fixed rate but for alterable periods of time during each cycle so as to produce in the tuned circuit an alternating current of fixed frequency for subsequent transformation and rectification into a DC voltage of predetermined, regulated level. A pulse-width modulator is connected in feedback-loop fashion between the system output terminals and switch circuitry employed to effect the periodic energization. Varying the length of time during which the switch circuitry is activated responsive to changes in the level of output voltage produces the desired regulating control.
Inventors
- 👤 Robert E. White
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-02 21:44
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/33569; H02M3/33573; H02M3/01; H02M3/33571; Y; Y02; Y02B; Y02B70/00; Y02B70/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
131 words
an energy converting and regulating circuit comprising: (a) a tuned circuit having a capacitive element connected in series with an inductive element; (b) means for periodically energizing said tuned circuit from a source of direct current so as to produce in said tuned circuit an alternating current of constant frequency; (c) transformer means having a primary winding and a secondary winding, said primary winding being connected in series with said tuned circuit for providing a signal across said secondary winding representative of said alternating current; (d) output means coupled to said secondary winding for providing an output signal representative of said alternating current, and (e) means responsive to said output signal for altering the duration of each periodic energization of said tuned circuit depending on the level of said output signal.
Claim 2
Dependent Claim
131 words
an energy converting and regulating circuit comprising: (a) a tuned circuit having a capacitive element connected in series with an inductive element; (b) means for periodically energizing said tuned circuit from a source of direct current so as to produce in said tuned circuit an alternating current of constant frequency; (c) transformer means having a primary winding and a secondary winding, said primary winding being connected in series with said tuned circuit for providing a signal across said secondary winding representative of said alternating current; (d) output means coupled to said secondary winding for providing an output signal representative of said alternating current, and (e) means responsive to said output signal for altering the duration of each periodic energization of said tuned circuit depending on the level of said output signal.
Claim 3
Dependent Claim
58 words
The energy converting and regulating circuit of claim 1 wherein said means (b) includes switch means for selectively connecting said tuned circuit to said source of direct current, and wherein said means (e) includes means coupled to said switch means for maintaining each said connection for a period of time depending on the level of said output signal.
Claim 4
Dependent Claim
39 words
The energy converting and regulating circuit of claim 1 wherein said means (e) includes means for increasing the duration of each periodic energization of said tuned circuit in response to a decrease in the level of said output signal.
Claim 5
Dependent Claim
39 words
The energy converting and regulating circuit of claim 1 wherein said means (e) includes means for decreasing the duration of each periodic energization of said tuned circuit in response to an increase in the level of said output signal.
Claim 6
Dependent Claim
190 words
An improved energy converting and regulating circuit of the type including a tuned circuit having a capacitive element connected in series with an inductive element, means for periodically energizing said tuned circuit from a source of direct current so as to produce in said tuned circuit an alternating current, transformer means having a primary winding and a secondary winding, said primary winding being connected in series with said tuned circuit for providing a signal across said secondary winding representative of said alternating current, output means coupled to said secondary winding for providing an output signal representative of said alternating current, and means responsive to said output signal for altering the periodic energization of said tuned circuit depending on the level of said output signal, wherein the improvement comprises means for causing said energization of said tuned circuit to occur at a fixed rate so as to produce in said circuit an alternating current of constant frequency and means for causing the duration of each periodic energization to increase with a decrease in the level of said output signal and decrease with an increase in the level of said output signal.
Claim 7
Dependent Claim
190 words
An improved energy converting and regulating circuit of the type including a tuned circuit having a capacitive element connected in series with an inductive element, means for periodically energizing said tuned circuit from a source of direct current so as to produce in said tuned circuit an alternating current, transformer means having a primary winding and a secondary winding, said primary winding being connected in series with said tuned circuit for providing a signal across said secondary winding representative of said alternating current, output means coupled to said secondary winding for providing an output signal representative of said alternating current, and means responsive to said output signal for altering the periodic energization of said tuned circuit depending on the level of said output signal, wherein the improvement comprises means for causing said energization of said tuned circuit to occur at a fixed rate so as to produce in said circuit an alternating current of constant frequency and means for causing the duration of each periodic energization to increase with a decrease in the level of said output signal and decrease with an increase in the level of said output signal.
Claim 8
Dependent Claim
106 words
An energy converting and regulating method comprising the steps of: (a) providing a tuned circuit having a capacitive element connected in series with an inductive element; (b) periodically energizing said tuned circuit from a source of direct current so as to produce in said circuit an alternating current of constant frequency; (c) receiving, via a transformer having its primary winding connected in series with said tuned circuit, an output signal representative of said alternating current produced in said tuned circuit; and (d) responsive to said output signal, altering the duration of each periodic energization of said tuned circuit depending on the level of said output signal.
Claim 9
Dependent Claim
106 words
An energy converting and regulating method comprising the steps of: (a) providing a tuned circuit having a capacitive element connected in series with an inductive element; (b) periodically energizing said tuned circuit from a source of direct current so as to produce in said circuit an alternating current of constant frequency; (c) receiving, via a transformer having its primary winding connected in series with said tuned circuit, an output signal representative of said alternating current produced in said tuned circuit; and (d) responsive to said output signal, altering the duration of each periodic energization of said tuned circuit depending on the level of said output signal.
Claim 10
Dependent Claim
48 words
The energy converting and regulating method of claim 6 wherein said step (b) includes selectively connecting said tuned circuit to said source of direct current, and wherein said step (d) includes maintaining each said connection for a period of time depending on the level of said output signal.
Claim 11
Dependent Claim
37 words
The energy converting and regulating method of claim 6 wherein said step (d) includes increasing the duration of each periodic energization of said tuned circuit in response to a decrease in the level of said output signal.
Claim 12
Dependent Claim
37 words
The energy converting and regulating method of claim 6 wherein said step (d) includes decreasing the duration of each periodic energization of said tuned circuit in response to an increase in the level of said output signal.
References Cited (Backward Citations)
No citation records indexed.
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