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121. 发明专利

GB2238674B Improved zero voltage switching AC relay circuit 未知
公开(公告)号：GB2238674B
公开(公告)日：1994-03-16
申请号：GB9021827
申请日：1990-10-08
申请人： TELEDYNE IND
发明人： GUAJARDO CIRO
IPC分类号： H03K17/78 , H03K17/13 , H03K17/785 , H03K17/79 , H02M1/08 , H03K17/722
摘要： A zero voltage switching circuit for controlling current to a serially arranged load and AC voltage source including first and second photosensitive silicon controlled rectifiers having a gate, anode, and cathode terminals, the anode-cathode terminals being arranged to be connected in inverse parallel across the load and AC voltage source, apparatus for applying input signals to generate light to enable the first and second photosensitive silicon controlled rectifiers, apparatus for providing a voltage range within which the photosensitive silicon controlled rectifiers operate, apparatus for clamping the gate terminals of each of the photosensitive silicon controlled rectifiers to its cathode in the absence of input light signals to the photosensitive silicon controlled rectifiers, and apparatus for opening the circuit between the gate and rectifier of each photosensitive silicon controlled rectifier in the presence of input light signals.

122. 发明专利

DE3590628T1 未知
公开(公告)号：DE3590628T1
公开(公告)日：1987-01-29
申请号：DE3590628
申请日：1985-11-29
IPC分类号： H03K17/725 , H03K17/13 , H03K17/693 , H03K17/722 , H03K17/723 , H03K17/78 , H03K17/79 , H03K17/94
摘要： PCT No. PCT/FR85/00339 Sec. 371 Date Aug. 5, 1986 Sec. 102(e) Date Aug. 5, 1986 PCT Filed Nov. 29, 1985 PCT Pub. No. WO86/03631 PCT Pub. Date Jun. 19, 1986.The disclosure relates to a static power switch circuit having a power switch member having a bidirectional power switch with at least one controlled semiconductor of the thyristor or triac type with power terminals connected to an AC source in series with a load and a circuit for controlling the power switch member having a first control switch whose current path is connected to the gate of the power semiconductor through a full wave rectifier bridge, this switch being connected to a circuit able to generate control energy of the switch in response to an input signal.

123. 发明专利

DE3517467A1 Circuit arrangement for the turn-off control circuit of a GTO thyristor 未知
公开(公告)号：DE3517467A1
公开(公告)日：1986-11-13
申请号：DE3517467
申请日：1985-05-10
申请人： LICENTIA GMBH
发明人： TADROS YEHIA DR ING
IPC分类号： H03K17/691 , H03K17/722 , H03K17/732 , H03K17/72
摘要： In a circuit arrangement for controlling a GTO thyristor (V) with a pulse transformer (T) arranged in the turn-off control circuit for the GTO thyristor (V), the secondary winding (II) of which transformer is connected via decoupling diodes (D5...Dn) between the control terminal and the cathode of the GTO thyristor (V) and the primary winding (I) of which is connected to a first voltage source (E1) via a first switching element (Q2) for the entire duration (tgw) of the turn-off process of the GTO thyristor (V), a lower stray inductance of the pulse transformer (T) is to be made possible by reducing the required voltage/time area in the latter. This is achieved by the fact that the primary winding (I) of the pulse transformer (T) is connected to a second voltage source (E2), the voltage of which is connected via a second switching element (Q1) to the voltage of the first voltage source (E1) from the beginning of the turn-off process for a much shorter time (T1) than the total duration (tgw) of the turn-off process.

124. 发明专利

GB2018059B CIRCUIT ARRANGEMENT FOR FIRING A THYRISTOR 未知
公开(公告)号：GB2018059B
公开(公告)日：1982-09-02
申请号：GB7910988
申请日：1979-03-29
申请人： BOSCH GMBH ROBERT
IPC分类号： H02M1/08 , H03K17/722 , H03K17/73 , H03K17/79 , H03K17/78
摘要： To turn a thyristor, particularly a high-voltage thyristor, ON, and to connect the thyristor and the utilization circuit to a power source, a charge capacitor is connected to a charging circuit to charge the capacitor when the thyristor is blocked or in OFF state. A controlled switch, typically a transistor 20, is connected to the charge capacitor 19 and connects the charge capacitor to the gate electrode of the thyristor, when the controlled switch is turned ON; a control circuit is connected to the controlled switch which includes an opto-coupler 28 to control its conduction. Preferably, a threshold sensitive element such as a Zener diode 25, or a four-layer diode 30, is included in the controlled switch transistor base circuit to provide for sharp turn-on characteristics. Since the conduction characteristics of the controlled switching transistor 20 will depend on the charge state of the capacitor 19, the controlled switching transistor will be conductive only when the capacitor has a sufficiently high charge for reliable firing of the thyristor.

125. 发明专利

BR8102394A 未知
公开(公告)号：BR8102394A
公开(公告)日：1981-12-22
申请号：BR8102394
申请日：1981-04-20
申请人： SIEMENS AG
发明人： KLEINSCHMIDT P , MAGORI V
IPC分类号： H01L41/107 , H02M1/08 , H03K17/689 , H03K17/722 , H03K17/94 , H03K17/56

126. 发明专利

GB2018059A CIRCUIT ARRANGEMENT FOR FIRING A THYRISTOR 未知
公开(公告)号：GB2018059A
公开(公告)日：1979-10-10
申请号：GB7910988
申请日：1979-03-29
申请人： BOSCH GMBH ROBERT
IPC分类号： H02M1/08 , H03K17/722 , H03K17/73 , H03K17/79 , H03K17/78
摘要： To turn a thyristor, particularly a high-voltage thyristor, ON, and to connect the thyristor and the utilization circuit to a power source, a charge capacitor is connected to a charging circuit to charge the capacitor when the thyristor is blocked or in OFF state. A controlled switch, typically a transistor 20, is connected to the charge capacitor 19 and connects the charge capacitor to the gate electrode of the thyristor, when the controlled switch is turned ON; a control circuit is connected to the controlled switch which includes an opto-coupler 28 to control its conduction. Preferably, a threshold sensitive element such as a Zener diode 25, or a four-layer diode 30, is included in the controlled switch transistor base circuit to provide for sharp turn-on characteristics. Since the conduction characteristics of the controlled switching transistor 20 will depend on the charge state of the capacitor 19, the controlled switching transistor will be conductive only when the capacitor has a sufficiently high charge for reliable firing of the thyristor.

127. 发明专利

SU431190A1 未知
公开(公告)号：SU431190A1
公开(公告)日：1974-06-05
申请号：SU1843922
申请日：1972-11-09
IPC分类号： H03K17/722 , C08G8/28 , C08G5/18

128. 发明专利

SU428504A1 未知
公开(公告)号：SU428504A1
公开(公告)日：1974-05-15
申请号：SU1762957
申请日：1972-03-21
IPC分类号： H03K17/722 , H02M1/08 , H03K17/00 , H02P13/16

129. 发明专利

GB1179556A Switching Circuits 未知
公开(公告)号：GB1179556A
公开(公告)日：1970-01-28
申请号：GB5735166
申请日：1966-05-27
申请人： LUCAS INDUSTRIES LTD
发明人： PHOENIX LANCELOT
IPC分类号： H02M3/10 , H02M3/135 , H02P7/29 , H03K17/722 , H03K17/723
摘要： 1,179,556. Control of D.C. motors. JOSEPH LUCAS (INDUSTRIES) Ltd. 1 May, 1967 [27 May, 1966; 22 Dec., 1966], Nos. 23927/66 and 57351/66. Heading H2J. [Also in Division H3] The power to the traction motor 49 of an industrial truck is supplied through a switch 52 of the type which, once turned on, can only be turned off by reducing the current flowing through it below a threshold value (e.g. a thyristor, thyratron or four-layer diode), switch 52 being turned off by the application of a signal to a transformer winding 54 connected, in series with a diode 53, across the motor 49. As. shown, periodic turn-off pulses are derived from oscillator 33-39; capacitor 43 charges as the flux in core 34 collapses and when the flux next rises, thyristor 47 switches on to discharge capacitor 43 and provide, through transformer 46, the turn-off pulse for thyristor 52. A capacitor 58 is held discharged through diode 61 and thyristor 52 until thyristor 52 is rendered non-conductive, whereupon capacitor 58 charges through throttle-controlled variable resistor 56 until transistor 65 is rendered conductive to provide a turn-on pulse to thyristor 52 through winding 69 of transformer 64, 67, 69. Should the charging time of capacitor 58 be greater than the period of oscillator 34, 35 (a condition ensured by opening switch 59) thyristor 52 does not switch on. In a modification (Fig. 2, not shown) winding 54 forms the third winding of transformer 34, components 42-48 being omitted, and an R.C. timing circuit having a throttlecontrolled variable resistor is attached to the gate of thyristor 52 for periodically switching it on. Turn-off may be provided on either the rise or collapse of flux in core 34 and the collapse may be caused either by saturation of core 34 or of transistor 35.

130. 发明授权

US10917091B2 Galvanic isolation circuit and system and a corresponding method of operation 有权
公开(公告)号：US10917091B2
公开(公告)日：2021-02-09
申请号：US16371919
申请日：2019-04-01
申请人： STMicroelectronics S.r.l.
发明人： Alessandro Parisi , Nunzio Greco , Nunzio Spina , Egidio Ragonese , Giuseppe Palmisano
IPC分类号： H03K7/08 , H03K17/691 , H03K17/723 , H03K17/722 , H03B5/06 , H03L7/08 , H03L7/06 , H03L7/183 , H02M3/335 , H02M1/00 , H01F19/08
摘要： An oscillator is coupled to a first side of a galvanic barrier for supplying thereto an electric supply signal. The oscillator is configured to be alternatively turned on and off as a function of a PWM drive signal applied thereto. A receiver circuit coupled to the galvanic barrier receives therefrom a PWM power control signal. A signal reconstruction circuit coupled between the receiver circuit block and the oscillator provides to the oscillator a PWM drive signal reconstructed from the PWM power control signal. The signal reconstruction circuit includes a PLL circuit coupled to the receiver circuit block and configured to lock to the PWM control signal from the receiver circuit block. A PLL loop within the PLL circuit is sensitive to the PWM drive signal applied to the oscillator. The PLL loop is configured to be opened as a result of the power supply oscillator being turned off.

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