EP0061744A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Transistor inverter device
Assignee: Toshiba Electric Equipment Corp
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Filing: 1982-03-26
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Granted: —
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Expires: 2002-03-26
Abstract
Abstract In a transistor inverter device, at its start immediately after a power switch (1a) is turned on, an output level of a drive circuit (23) is low. A transistor (43) in a control circuit (41) for its start is conductive and a voltage dividing circuit constituted with resistors (42, 44) operates. An output from a full-wave rectifier (34) is voltage-divided by the resistors (42, 44). The divided voltage is applied to the cathode of Zener diode (36). Such an operation of the control circuit (41) prevents an inverter stopping circuit (33) from erroneously operating at the time of the start of the inverter device.
Inventors
- 👤 Kenichi Inui
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 16:05
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/5383; H02M7/53846; H02M7/53862; H02M7/538; H02M7/53803; H02M7/53806; H05; H05B; H05B41/00; H05B41/14; H05B41/26; H05B41/28; H05B41/282; H05B41/285; H05B41/2851; H05B41/2855; Y; Y02; Y02B; Y02B70/00; Y02B70/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
144 words
A transistor inverter device having a power source section (1), an inverter device (4) for producing a high frequency output through the switching operation of a transistor (17, 18) in response to an output signal from said power source section (1), a base current control circuit (27) for limiting a base current fed to ' said transistor (17, 18) during a predetermined period offline after the start of said inverter device (4), and an inverter stopping circuit (33) for stopping the operation of said inverter device upon detection of an abnormality in the output of said inverter device (4), characterized in-that the device further comprises a control circuit (41, 51) for stopping the operation of said inverter stopping circuit (33) for a given period of time after the start of said inverter device (4) in response to the output from said inverter device (4).
Claim 2
Dependent Claim
144 words
A transistor inverter device having a power source section (1), an inverter device (4) for producing a high frequency output through the switching operation of a transistor (17, 18) in response to an output signal from said power source section (1), a base current control circuit (27) for limiting a base current fed to ' said transistor (17, 18) during a predetermined period offline after the start of said inverter device (4), and an inverter stopping circuit (33) for stopping the operation of said inverter device upon detection of an abnormality in the output of said inverter device (4), characterized in-that the device further comprises a control circuit (41, 51) for stopping the operation of said inverter stopping circuit (33) for a given period of time after the start of said inverter device (4) in response to the output from said inverter device (4).
Claim 3
Dependent Claim
93 words
A transistor inverter device according to claim 1, characterized in that said control circuit (41) , includes a transistor (43) to be made conductive by an output from said inverter device (4) at the time of the operation of said base current control circuit (27), said output being lower than that in a normal state, a voltage dividing circuit (42, 43) operable when said transistor (43) is conductive, and means for treating the output signal from said voltage dividing circuit (42, 48) as an abnormal detecting signal of said inverter stopping circuit (33).
Claim 4
Dependent Claim
154 words
A transistor inverter device according to claim 1, characterized in that said inverter stopping circuit (33) includes means (11) for detecting an output from said inverter device (4), a full-wave rectifier (34) for rectifying the detected output, a Zener diode (36) supplied with output from said full-wave rectifier (34), and means (38) for stopping the' operation of said inverter device (4) in response to the output signal from said Zener diode (36), and said control circuit (41) includes a first resistor (42) connected between one output terminal of said full-wave rectifier (34) and said Zener diode (36), a transistor (43) with an emitter-collector path and a second resistor (44), both being connected to a junction point between said first resistor (42) and said Zener diode (36) in series, and means (23, 45) for applying a DC voltage corresponding ' to the output of said inverter device (4) to the base of said transistor (43).
Claim 5
Dependent Claim
140 words
A transistor inverter device according to claim 1, characterized in that said inverter stopping circuit (33) includes means (11) for detecting the output of said inverter device (4), a full-wave rectifier (34) for rectifying the detected output, a first Zener diode (36) supplied with ' the output voltage from said full-wave rectifier (34), and means (38) for stopping the operation of said inverter device (4) in response to the output signal from said first Zener diode (36), and said control circuit (51) includes a transistor (52) with an emitter-collector path connected between said first Zener diode (36) and said operation stopping means (38), a second Zener diode (53) connected to the base circuit of said transistor (52), and means (23) for applying a DC voltage corresponding to the output from said inverter device (4) to said second Zener diode (53).
References Cited (Backward Citations)
No citation records indexed.
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