Patent EP0058035A1 successfully refreshed from Google Patents.
EP0058035A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Transistor inverter device
Assignee: Toshiba Corp
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Filing: 1982-02-01
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Granted: —
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Expires: 2002-02-01
Abstract
Abstract A transistor inverter device includes a capacitor (12) combined with an input winding (16 1 ) of a transformer (16) to form a resonance circuit and supplying to a transistor (14) a collector current having a large peak value. An inductor (24) is connected between the base and the emitter of the transistor (14). The inductor (24) generates reverse electromotive force according to a collector current flowing immediately before the transistor (14) is turned off and applied this reverse electromotive force between the base and the emitter of the transistor (14) as reverse bias. The switching operation of the transistor (14) from on-condition to off-condition is accelerated by this reverse bias of the inductor (24).
Inventors
- 👤 Nanjou Aoike
- 👤 Keiichi Shimizu
- 👤 Akiyoshi Hashima
- 👤 Ethuo Matsunoshita
- 👤 Mitsutoshi Kimura
- 👤 Yukio Yoshikawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 09:34
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/5383; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/338; Y; Y02; Y02B; Y02B70/00; Y02B70/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
190 words
A transistor inverter device for turning on and off current flowing from a DC power source through an input winding of a transformer by means of a transistor to output AC voltage from an output winding of said transformer, characterized in that said device comprises: said transformer having at least said input winding (16 1 ), output winding (16 2 ) and a base winding (16 3 ), said input winding (16 1 ) being arranged in series with the collector-emitter of said transistor (14) and said base winding (16 3 ) being arranged between the base and the emitter of said transistor; a capacitor (12) combined with said transformer (16) to form a parallel resonance circuit; and an inductor (24) arranged between the base of said transistor (14) and said base winding (16 3 ), said inductor serving to allow a part of current flowing immediately before said transistor (14) is turned off to flow therethrough, to generate inductive voltage according to the magnitude of this current allowed to flow, and to apply this inductive voltage between the base and the emitter of said transistor (14) as reverse bias.
Claim 2
Dependent Claim
190 words
A transistor inverter device for turning on and off current flowing from a DC power source through an input winding of a transformer by means of a transistor to output AC voltage from an output winding of said transformer, characterized in that said device comprises: said transformer having at least said input winding (16 1 ), output winding (16 2 ) and a base winding (16 3 ), said input winding (16 1 ) being arranged in series with the collector-emitter of said transistor (14) and said base winding (16 3 ) being arranged between the base and the emitter of said transistor; a capacitor (12) combined with said transformer (16) to form a parallel resonance circuit; and an inductor (24) arranged between the base of said transistor (14) and said base winding (16 3 ), said inductor serving to allow a part of current flowing immediately before said transistor (14) is turned off to flow therethrough, to generate inductive voltage according to the magnitude of this current allowed to flow, and to apply this inductive voltage between the base and the emitter of said transistor (14) as reverse bias.
Claim 3
Dependent Claim
42 words
A transistor inverter device according to claim 1, characterized by further including another capacitor (22) connected in series with said inductor (24) to form another resonance circuit and arranged between the-base of said transistor (14) and said base winding (16 3 ).
Claim 4
Dependent Claim
27 words
A transistor inverter device according to claim 1 or 2, characterized by further including a resistor (36) arranged parallel to said inductor (24) to suppress parasitic oscillation.
Claim 5
Dependent Claim
20 words
A transistor inverter device according to claim 1, 2 or 3, characterized in that said transformer (16) is an autotransformer.
Claim 6
Dependent Claim
37 words
A transistor inverter device according to claim 4, characterized in that said autotransformer (16) is combined with said capacitor (12) connected between both ends of said input winding (16 1 ) to form said resonance circuit (17).
Claim 7
Dependent Claim
34 words
A transistor inverter device according to claim 1, 2 or 3, characterized in that said transformer is an insulation type transformer (40) having primary and secondary windings (40 1 ) and (40 2 ).
Claim 8
Dependent Claim
39 words
A transistor inverter device according to claim 6, characterized in that said insulation type transformer (40) is combined with said capacitor (12) connected between both ends of said primary winding (40 1 ) to form said resonance circuit (17).
Claim 9
Dependent Claim
199 words
A transistor inverter device characterized in that said device comprises: a DC power source (10); a transistor (14) for switching said DC power source; a first capacitor (12) arranged between one end of said DC power source (10) and the collector of said transistor (14); an autotransformer (16) in which said first capacitor (12) is arranged between both ends of an input winding (16 1 ) to form a parallel resonance circuit (17), said input winding (16 1 ) is arranged in series with the collector-emitter of said transistor (14), and a base winding (16 3 ) is arranged between the base and the emitter of said transistor (14); an inductor (24) having one end thereof connected to the base of said transistor (14), said inductor (24) serving to allow a part of collector current flowing immediately before said transistor (14) is turned off to flow therethrough, to generate inductive voltage according to the magnitude of this current allowed to flow, and to apply this inductive voltage between the base and the emitter of said transistor (14); and a second capacitor (22) arranged between the other end of said inductor (24) and said base winding (16 3 ) .
Claim 10
Dependent Claim
199 words
A transistor inverter device characterized in that said device comprises: a DC power source (10); a transistor (14) for switching said DC power source; a first capacitor (12) arranged between one end of said DC power source (10) and the collector of said transistor (14); an autotransformer (16) in which said first capacitor (12) is arranged between both ends of an input winding (16 1 ) to form a parallel resonance circuit (17), said input winding (16 1 ) is arranged in series with the collector-emitter of said transistor (14), and a base winding (16 3 ) is arranged between the base and the emitter of said transistor (14); an inductor (24) having one end thereof connected to the base of said transistor (14), said inductor (24) serving to allow a part of collector current flowing immediately before said transistor (14) is turned off to flow therethrough, to generate inductive voltage according to the magnitude of this current allowed to flow, and to apply this inductive voltage between the base and the emitter of said transistor (14); and a second capacitor (22) arranged between the other end of said inductor (24) and said base winding (16 3 ) .
Claim 11
Dependent Claim
29 words
A transistor inverter device according to claim 8, characterized in that said autotransformer (16) has a load connected between both ends of an output winding (1 6 2) .
References Cited (Backward Citations)
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