35results about How to "Control conduction" patented technology

The invention discloses a light emitting diode (LED) drive circuit controlled by a parallel connection high voltage metal oxide semiconductor (MOS) tube and mainly solves the problem that existing drive circuits can not integrate effects of low costs and high efficiency and power factors. The LED drive circuit comprises a rectifier bridge, a control circuit, N strings of loads, N high voltage MOS tubes and N voltage reference circuits, the rectifier bridge is used for performing full-wave rectification for an alternating current signal, the N strings of loads are in a series connection in a single group mode and are in a bridge joint between the rectifier bridge and a drain electrode of the Nth high voltage MOS tube, common ends of two adjacent strings of loads are connected to drain electrodes of corresponding high voltage MOS tubes respectively, grid electrodes of the N high voltage MOS tubes are connected with the N voltage reference circuits respectively, source electrodes of the N high voltage MOS tubes are connected and connected to the control circuit, the control circuit detects current of the loads to adjust the voltage of the source electrodes of the high voltage MOS tubes so as to control the working states of the high voltage MOS tubes, and thereby the loads of an access circuit can be adjusted. The LED drive circuit controlled by parallel connection high voltage MOS tube has the advantages that peripheral devices are few, the service life is long, the efficiency and power factor are high, and the LED drive circuit can be directly integrated on a lamp panel carried with LED strings.

The invention discloses a double-knife high voltage isolating switch which comprises a holder. Insulators are symmetrically installed at both sides of the top of the holder, and contactor seats are fixedly installed on the top of the insulators. Latching plates are arranged on the contact seats. A shaft rod passes through and is installed in the middle of an upper surface of the holder, and a knife driving device is installed on a side wall of the shaft rod. The latching plates are connected or disconnected by using two S-shaped knives and two -shaped knives, and the current conduction can be effectively and stably controlled. Rotational directions of the S-shaped knives are made different through mutual cooperation of a driven fluted disc, a driving fluted disc, and a bevel gear shaft. It is convenient to use the isolating switch. The -shaped knives are in butt joint with matched contact blocks by using a rolling disc and an eccentric motion principle, and a virtual connection phenomenon when a single knife switch is used can be effectively prevented. Contact pins can be effectively prevented from falling off from pin holes by installing spacer pins in the pin holes.

The invention discloses an IGBT isolation driving circuit with a switch control unit and a control method thereof. The circuit comprises a pulse driving unit for generating waveform signals with complementary phases, a diode rectification unit, the switch control unit, a driving resistor, a switch-off resistor and an insulated gate bipolar transistor (IGBT), output terminals of the driving resistor and the switch-off resistor are both connected with a grid electrode of the IGBT, an emitter electrode of the IGBT is connected to the ground, an input terminal of the switch control unit is connected with the diode rectification unit, and an output terminal of the switch control unit is connected with an input terminal of the switch-off resistor to control cut-off of the IGBT when the pulse driving unit stops signal output. According to the circuit, the driving energy can be transmitted, the transmission of switch signals is completed, cut-off and switch-on of the IGBT can be well controlled through the switch control unit, the circuit can be applicable to a low-frequency condition, and the practicality is high.

The invention discloses a double-knife high voltage isolating switch which comprises a clamp holder. Insulators are symmetrically arranged on both sides of the top of the clamp holder. A contact base is fixedly arranged at the top of each insulator. A locking plate is arranged on each contact base. A shaft lever is inserted into the middle upper surface of the clamp holder. A knife driving device is arranged on the side wall of the shaft lever. The locking plates are connected or disconnected through two S-shaped knives and two straight knives. Current conduction can be effectively and steadily controlled. Through mutual interaction of a driven gear disk, a drive gear disk and an umbrella gear shaft, the rotation directions of the S-shaped knives are opposite, which facilitates the use of the isolating switch. A rotary disk is used, and the principle of eccentric movement is used to realize butt joint of the straight knives and matched contact blocks, so as to effectively avoid the phenomenon of virtual connection when a single knife is used. A contact pin is effectively prevented from falling off from a pin hole by arranging a limit pin in the pin hole.

The invention discloses a device and method for detecting continuous light emission of a multi-channel optical network unit. The device for detecting continuous light emission of the multi-channel optical network unit comprises a multi-channel relay switch, a multi-channel analyzer and a control unit, wherein the multi-channel relay switch is connected with each optical network unit to be detected and used for controlling turn-on and turn-off of current between each optical network unit to be detected and a power supply; the multi-channel analyzer is connected with each optical network unit to be detected and used for obtaining and outputting the optical power value of each optical network unit to be detected; and the control unit is respectively connected to the multi-channel analyzer and the multi-channel relay switch and used for controlling turn-on or turn-off of the multi-channel relay switch and obtaining the optical power value of each optical network unit to be detected from the multi-channel analyzer, such that whether each optical network unit to be detected is in the continuous light emission state or not can be judged.

The invention relates to a battery management system (BMS) pre-charging circuit and a control method thereof. The BMS pre-charging circuit includes an AFE front end detection unit, an MCU controller, a short circuit detection unit, a detection resistor, a pre-charging resistor, a pre-charging MOS tube, and a main power MOS tube, and the corresponding control method includes the following steps that S1, a charging current is sampled; S2, the AFE front end detection unit judges whether a sampled charging current value is greater than or equal to a preset overcurrent threshold or not, if yes, the step S3 is performed, otherwise, the step S1 is returned; S3, overcurrent protection is performed; S4, the pre-charging process is performed; and S5, normal power on is recovered. Compared with the prior art, without changing an original connection mode, that is, an external ignition signal is not input, the BMS pre-charging circuit can effectively solve the problem that a power part cannot be powered on normally due to overcurrent protection in the moment of power on.

The invention discloses a power-off reset system applied to electronic equipment, which comprises a current detection module, a relay module and a processor module, wherein the current detection module is connected with a power supply and used for detecting the power supply current of the power supply to the electronic equipment; the input end of the relay module is connected with the current detection module, the output end is connected with the electronic equipment, and the relay module is used for controlling the turn-on or turn-off of the power supply to the electronic equipment; and the processor module is connected with the current detection module and the relay module, the processor module acquires a current value detected by the current detection module, judges whether the operation of the electronic equipment is abnormal or not according to the current value, and sends a power-off reset signal to the relay module if the operation is abnormal so as to enable the electronic equipment to be subjected to power-off reset. The system can performs power-off reset on the electronic equipment in a forcible manner when the electronic equipment breaks down so as to enable the electronic equipment to be in a normal working state again.

The invention discloses a power switching circuit, a power switching method, a wire controller and air conditioning equipment. The circuit comprises a Homebus power supply module and a battery module,and one of the Homebus power supply module and the battery module is selectively conducted with a wire controller through a power supply switching module to supply power to the wire controller; one end of the power supply switching module is connected with the Homebus power supply module and the battery module, the other end of the power supply switching module is connected with the wire controller, and the power supply switching module is used for controlling the battery module to be conducted with the wire controller when the first current and the second current meet preset conditions; andwhen the first current and the second current do not meet the preset condition, the Homebus power supply module is controlled to be connected with the wire controller, wherein the Homebus power supplymodule outputs the first current, and the battery module outputs the second current. According to the invention, the wire controller can be prevented from stopping working due to insufficient power supply, and the stability is improved.

The invention provides a waterlogging sensor and a rust-proof method for waterlogging sensor probes. According to the waterlogging sensor, the first probe of the waterlogging sensor is connected witha first IO interface in a microcontroller unit (MCU) of the waterlogging sensor, and the second probe of the waterlogging sensor is connected with a second IO interface in the MCU, wherein output states of the first IO interface and the second IO interface in the same period are complementary, the output states comprise high level output and low level output, and during the adjacent periods, the output state of the first IO interface and the output state of the second IO interface are alternated between high level output and low level output; and in the process of water entry probing in the same period, the first probe and the second probe communicate, and electronic backflow is formed. According to the waterlogging sensor and the rust-proof method, electronic losses of the two probes arecompensated in an electric quantity consuming mode to prolong the service life of the waterlogging sensor probes and decrease the rusting probability so as to solve the problem that stainless steel probes are still rusted when being in water for a long time.

The invention provides a material inputting device and a cooking appliance. The material inputting device comprises a feeding channel and a movable seal. The feeding channel is arranged in an upper cover and/or a pot body of the cooking appliance. The movable seal is limited in the feeding channel and can reciprocate in the feeding channel to disconnect or conduct the feeding channel. A movable seal is provide in the feed passage, the reciprocating movement of the movable seal in the feeding channel is used to control whether the feeding channel is connected or not, so that the feeding channelcan be in a connected state during the feeding process, and in the non-feeding process, is in a disconnected state (i.e., sealing the feeding channel), thereby solving the problem that water droplets, dirt, rice grains or cockroaches and other pests enter the rice feeding pipe because the rice feeding pipe is always in a conducting state in the prior art, and improving the cleanliness and reliability of the material feeding device.

The invention discloses a RAID card power supply circuit, which comprises a PMOS transistor, a current detection unit and an operation unit. The D terminal of the PMOS transistor is connected with a current detection unit, the S terminal of the PMOS transistor is connected with the standby unit in the power-down protection circuit of the RAID card, the G terminal of the PMOS transistor is connected with the output terminal of the OR arithmetic unit, or the input end of the operation unit is respectively connected with the output end of the current detection unit and the output end of the power-down detection unit in the power-down protection circuit, The current detection unit is arranged between the power standby unit and the RAID card, and is used for outputting a high level to control the PMOS transistor to be turned off if it is judged that the line between the power standby unit and the RAID card is overcurrent during the power supply of the power standby unit to the RAID card. The over-current damage to the standby unit can be avoided, and the body diode contained in the PMOS transistor can be utilized to realize the anti-leakage function.

The invention discloses a current one-way conduction circuit and a working method thereof, the current one-way conduction circuit comprises an input end Vin, an output end Vout, an MOS tube, a current mutual inductance module, a voltage comparator and a voltage division module, the input end Vin is connected with the voltage division module, the input end Vin is connected with a drain electrode of the MOS tube, a source electrode of the MOS tube is connected with the current mutual inductance module, and the output end Vout is connected with the current mutual inductance module. The current mutual inductance module is connected with the output end Vout, the voltage comparator is connected with the voltage dividing module, the voltage comparator is connected with the current mutual inductance module, and the voltage comparator is connected with the grid electrode of the MOS tube. Therefore, one-way conduction of current can be realized, energy loss can be reduced, and charging efficiency can be improved.

A household appliance safety door lock comprises a base, a door hook, a first sliding block, an electromagnetic switch box and a second sliding block arranged between the electromagnetic switch box and the base. A door lock opening is formed in the position, corresponding to the door hook, of the base. A limiting opening is formed in the middle of the first sliding block. The electromagnetic switch box comprises a box base, a static contact arranged in the box base, a movable contact spring which is arranged in the box base and is opposite to the static contact, a locking block which movably protrudes out of the bottom surface of the box base, and an ejector rod which is positioned on one side, far away from the box upper cover, of the movable contact spring and movably protrudes out of the bottom surface of the box base; the limiting opening is movably opposite to the locking block, an acting protruding block is arranged on one side of the second sliding block in a protruding mode, a guide inclined face is arranged on the acting protruding block, and the ejector rod is located above the acting protruding block. Therefore, the use state of the door can be truly corresponding, so that the conduction circuit is controlled to be switched on or switched off, and the safety is improved.

The invention discloses a flower-watering dual spray pipe mechanism which comprises a mounting plate. The mounting plate is provided with a first spray pipe, the first spray pipe is provided with a control switch, the control switch is provided with a knob, the mounting plate is provided with a second spray pipe, and the second spray pipe is provided with a switch. The flower-watering dual spray pipe mechanism can be in butt joint with a water spraying machine conveniently through the first spray pipe and the second spray pipe, water is sprayed conveniently through the water spraying machine, and thus flowers are watered conveniently. The water flow connection can be controlled through the knob and the switch.

The invention provides an environment-friendly low-temperature drying method and equipment for pepper production, and belongs to energy-saving agricultural product drying machinery. The environment-friendly low-temperature drying equipment comprises a box body; a drying groove is arranged at the top of one side in the box body; an overturning mechanism for overturning pepper is arranged in the drying groove; a first transmission mechanism used for rotating the overturning mechanism is arranged at the top of one side of the box body; a dust removal groove is arranged at the bottom of one side in the box body; a dust suction mechanism is arranged in the dust removal groove; a second transmission mechanism is arranged between the turnover mechanism and the dust suction mechanism; and a driving mechanism is arranged on the second transmission mechanism. According to the environment-friendly low-temperature drying equipment provided by the invention, through the arranged second transmission mechanism and forward rotation of a second stepping motor of the second transmission mechanism, air suction fan blades of the driving mechanism can be made to rotate, under the action of the air suction fan blades, dust thrown out by pepper overturning can be sucked into the dust removal groove, the dust can be collected through the dust collection mechanism, and dust removal of pepper is achieved.

The invention provides environment-friendly physical drying equipment and method for dirt. The equipment comprises a box body, a feeding mechanism used for crushing the dirt and feeding crushed materials into the box body is arranged on one side of the box body, a heat energy mechanism used for recycling hot air generated by dirt drying is arranged on the feeding mechanism, a drying mechanism used for drying the dirt is arranged in the box body, a communicating part is arranged between the drying mechanism and the feeding mechanism, and a control mechanism matched with the drying mechanism is further arranged in the box body. According to the equipment, through the arranged feeding mechanism, the dirt can be crushed, through the drying mechanism, the crushed dirt can be dried, the hot air generated through drying can pass through a second cavity of a feeding part under the action of exhaust fan blades of the feeding mechanism, and then the crushed dirt stored in the feeding part can be preheated, so that heat energy can be recycled, the utilization rate of resources is increased, and the dirt drying efficiency is improved.