The present invention relates to a high power compact alternate current voltage reducing power strip which comprises an input end and an output end; a high power bidirectional thyristor circuit is positioned between the input end and the output end; the high power bidirectional thyristor circuit controls output voltage at the output end according to voltage level at the input end; the high power bidirectional thyristor circuit performs control by a relay control circuit in cooperation with a sampling drive trigger circuit; the relay control circuit is controlled by a rectifier filter comparison sampling circuit; the rectifier filter comparison sampling circuit performs rectification, filter, sampling and comparison on power supply from the input end, so that power fulfilling the voltage requirement is directed to the operating sockets at the output end, thereby ensuring power.

Provided is a method and system that includes a direct current solid state power controller that includes a plurality of switching devices connected in parallel for performing switching, one or more main transient voltage suppressors (TVSs) to perform voltage clamping, a plurality of parasitic inductances each connected in series with a switching device of the plurality of switching devices, and a plurality of local TVSs each connected in parallel with a series connection of a switching device and at least one parasitic inductor of the plurality of parasitic inductances, to dissipate energy stored within the at least one parasitic inductor of the plurality of parasitic inductances.

A thyristor or triac control circuit includes a first capacitive element that is series-connected with a first diode between a first terminal and a second terminal intended to be coupled to a gate of the thyristor or triac. A second capacitive element is coupled between the second terminal and a third terminal intended to be connected to a conduction terminal of the thyristor or triac on the gate side of the thyristor or triac. A second diode is coupled between the third terminal and a node of connection of the first capacitive element and first diode.

The present invention relates to a high power compact alternate current voltage reducing power strip which comprises an input end and an output end; a high power bidirectional thyristor circuit is positioned between the input end and the output end; the high power bidirectional thyristor circuit controls output voltage at the output end according to voltage level at the input end; the high power bidirectional thyristor circuit performs control by a relay control circuit in cooperation with a sampling drive trigger circuit; the relay control circuit is controlled by a rectifier filter comparison sampling circuit; the rectifier filter comparison sampling circuit performs rectification, filter, sampling and comparison on power supply from the input end, so that power fulfilling the voltage requirement is directed to the operating sockets at the output end, thereby ensuring power.

The present invention relates to a high power compact alternate current voltage reducing power strip which comprises an input end and an output end; a high power bidirectional thyristor circuit is positioned between the input end and the output end; the high power bidirectional thyristor circuit controls output voltage at the output end according to voltage level at the input end; the high power bidirectional thyristor circuit performs control by a relay control circuit in cooperation with a sampling drive trigger circuit; the relay control circuit is controlled by a rectifier filter comparison sampling circuit; the rectifier filter comparison sampling circuit performs rectification, filter, sampling and comparison on power supply from the input end, so that power fulfilling the voltage requirement is directed to the operating sockets at the output end, thereby ensuring power.

An apparatus for driving a thyristor in an alternating-current power grid includes a non-isolated power supply circuit and a throttling circuit. One terminal of a power supply input of the non-isolated power supply circuit is connected to a first terminal of the thyristor. The other terminal of the power supply input is connected to another phase of the power supply relative to the first terminal or a neutral lead. The non-isolated power supply circuit forms a signal trigger loop through the throttling circuit, a second terminal of the thyristor and the first terminal of the thyristor. A control terminal of the throttling circuit is connected to a third terminal of the thyristor. The apparatus of the present invention has advantages of occupying a small space and having a simple circuit, a great instantaneous triggering current, a high cost effectiveness, and a low power consumption.

An apparatus for driving a thyristor in an alternating-current power grid includes a non-isolated power supply circuit and a throttling circuit. One terminal of a power supply input of the non-isolated power supply circuit is connected to a first terminal of the thyristor. The other terminal of the power supply input is connected to another phase of the power supply relative to the first terminal or a neutral lead. The non-isolated power supply circuit forms a signal trigger loop through the throttling circuit, a second terminal of the thyristor and the first terminal of the thyristor. A control terminal of the throttling circuit is connected to a third terminal of the thyristor. The apparatus of the present invention has advantages of occupying a small space and having a simple circuit, a great instantaneous triggering current, a high cost effectiveness, and a low power consumption.

The invention discloses a standby control circuit and a display device. The standby control circuit includes a standby module, at least one power board, and a transistor switch control module comprising at least one transistor switch whose number is equal to that of the at least one power board, each transistor switch is connected between one power board and a mains supply input terminal, the standby module is configured to generate a trigger signal and send the generated trigger signal to each transistor switch, and each transistor switch is configured to be turned on upon receipt of the trigger signal sent from the standby module so as to connect the power board connected thereto with the mains supply input terminal.

The invention discloses a standby control circuit and a display device. The standby control circuit includes a standby module, at least one power board, and a transistor switch control module comprising at least one transistor switch whose number is equal to that of the at least one power board, each transistor switch is connected between one power board and a mains supply input terminal, the standby module is configured to generate a trigger signal and send the generated trigger signal to each transistor switch, and each transistor switch is configured to be turned on upon receipt of the trigger signal sent from the standby module so as to connect the power board connected thereto with the mains supply input terminal.

A direct current (DC) circuit breaker for power transmission or distribution system includes a current sensor for sensing current of a system, a controller, a physical switch, and multiple switch modules. The multiple switch modules are electrically coupled to the current sensor and the physical switch in series. Each switch module includes multiple base elements electrically coupled in parallel. Each base element includes a first silicon carbide (SiC) metal-oxide-semiconductor field-effect transistor (MOSFET) and a second SiC MOSFET electrically coupled in an opposite series connection mode. The first and second SiC MOSFETs are configured in a synchronous rectification mode by channel reverse conduction control. The controller controls the multiple switch modules to connect current in the system, and break current of the multiple switch modules according to sensed current signals from the current sensor.