Abstract: An emergency power supply capable of turning off a sensor in an emergency lighting mode is used for transmitting a current to an LED driver when mains power is cut off. The LED driver is connected to the mains power. After receiving a current input by the mains power, the LED driver converts the current into a direct current and outputs the direct current to an LED light. When the mains power is normal, the emergency power supply supplies power to the sensor. When the mains power is cut off, the emergency power supply stops supplying power to the sensor. Compared with the prior art, the emergency power supply cannot supply power to the sensor in an emergency lighting mode, and the sensor will be turned off, thus guaranteeing the safety of users in an emergency.

Abstract: Provided is a communication circuit between an emergency power supply and a conventional power supply, including an emergency power supply, a conventional power supply, a sending data line, and a receiving data line, where the sending data line and the receiving data line are connected to the conventional power supply through a communication interface, the sending data line and the receiving data line share one connecting line with a direct current power supply, and the direct current power supply subjected to capacitor rectifier filtering is connected to the communication circuit to achieve double line communication, with fewer connecting lines and without installation errors.

Abstract: Disclosed is a downlight power box control circuit capable of realizing emergency lighting and general lighting, comprising a battery, a logic input module and a light-emitting element which are electrically connected to a main control module. The logic input module determines whether a mains voltage is available. In a case where the mains supply supplies power normally, the main control module controls the light-emitting elements to operate according to 100% of a load power. In case of an outage of the mains supply, the battery is used to supply power to a light tube, and the control module controls the light-emitting element to operate according to 30%-50% of the load power to realize emergency lighting.

Abstract: The invention provides a boost circuit and a lighting device. A controller is electrically connected to a first terminal of a switch transistor, a first terminal of a voltage sampling circuit and a first terminal of a current sampling circuit, a third terminal of the switch transistor is electrically connected to a second terminal of the current sampling circuit, and a second terminal of the voltage sampling circuit is electrically connected to an inductor. The voltage sampling circuit and the current sampling circuit respectively acquire an output voltage and an output current and feed the output voltage and the output current back to the controller to enable the controller to adjust a drive control signal to stabilize the output voltage at a set voltage value, such that a stable supply voltage is provided for a load.

Abstract: The invention provides an explosion-proof switch and an explosion-proof electrical device. A second protective shell is provided with a second receiving cavity, and a switch element is received in the second receiving cavity; and a button is slidably assembled in the second protective shell and received in the second receiving cavity, and the button is able to slide to be in contact with or separated from the switch element to turn on or off the switch element. By arranging the switch element in a first protective shell and the second protective shell and arranging the button in the second protective shell, the explosion-proof switch can resist impacts and explosions, and the explosion-proof switch and the explosion-proof electrical device can be used together more easily.

Abstract: The invention provides an explosion-proof switch and an explosion-proof electrical device. A first sealing element is in seal contact with a switch element and an inner wall of a first receiving cavity, a lead cable has an end connected to the switch element and an end penetrating through a cable hole and stretching out of a first protective shell, and a second sealing element is arranged in the cable hole and in seal contact with an inner wall of the cable hole and the lead cable. An assembly clearance between the switch element and the first protective shell and an assembly clearance between the lead cable and the first protective shell are sealed to improve the sealing performance of the explosion-proof switch, thus avoiding a short circuit or an explosion.

Abstract: The invention provides a short-circuit protection circuit and a lighting device. A control circuit comprises a thyristor and a switch transistor. A comparison circuit is electrically connected to a power supply, one terminal of a current sampling circuit and one terminal of the thyristor, the other terminal of the current sampling circuit is electrically connected to a first terminal of the switch transistor, a second terminal of the switch transistor is electrically connected to a second terminal of the thyristor, a third terminal of the switch transistor is electrically connected to an external load. By adopting the invention, the thyristor can be kept in an on-state to control on-off of the switch transistor so as to ensure that the switch transistor can be completely turned off, thus effectively improving the validity and reliability of short-circuit protection.

Abstract: Disclosed is a light tube circuit for switching between emergency lighting and general lighting, comprising a main control module, wherein one terminal of the main control module is connected to a mains supply and a battery, and the other terminal of the main control module is connected to a light-emitting element. Logic judgment is realized by the main control module, and in a case where the mains supply can supply power normally, the main control module controls the light-emitting element to operate in a general lighting mode; and in case of an outage of the mains supply, the main control module controls the battery to supply power to a light tube to realize emergency lighting when the mains supply cannot supply power normally, thus satisfying usage requirements of users.

Abstract: Disclosed is a downlight power box control circuit capable of realizing emergency lighting and general lighting, comprising a battery, a logic input module and a light-emitting element which are electrically connected to a main control module. The logic input module determines whether a mains voltage is available. In a case where the mains supply supplies power normally, the main control module controls the light-emitting elements to operate according to 100% of a load power. In case of an outage of the mains supply, the battery is used to supply power to a light tube, and the control module controls the light-emitting element to operate according to 30%-50% of the load power to realize emergency lighting.

Abstract: The application provides an emergency power supply circuit and a lighting device. A main control unit monitors an output voltage of a charging circuit; when the charging circuit is abnormal, an auxiliary power supply is connected to an energy storage unit by means of an auxiliary power supply control circuit to charge the energy storage unit to ensure the power supply stability of the energy storage unit; a boost unit is controlled to be turned on by means of a boost control circuit to boost an output voltage of the energy storage unit to ensure that the output voltage can satisfy the operating voltage requirement of a load; and the boost circuit is electrically connected to a drive control unit by means of a feedback unit to regulate the output volage in real time so as to provide a stable boosted voltage for the load.

Abstract: Provided are a constant-power pure sine wave output circuit, a device, and a power supply system. The circuit includes an AC-DC module, a charging module, a DC-DC boost module, a DC-AC output module, and an MCU module. The AC-DC module is electrically connected to the DC-DC boost module through the charging module, and the DC-DC boost module is electrically connected to the DC-AC output module. The MCU module is electrically connected to both the AC-DC module and the charging module. When there is a power outage, the first DC signal output by the AC-DC module will be lower than the preset DC threshold value, and the MCU module controls the charging module to transmit the second DC signal to the DC-DC boost module. Therefore, the circuit is capable of avoiding subsequent power outages, improving power supply stability, and meeting the requirements of applications with higher lighting demands.