32results about How to "Will not cause burnout" patented technology

The invention discloses a three-working-position electric operation mechanism for a switching device, and a driving device, a manual interlocking device and an electrical control device are arranged in a case of the mechanism, wherein the driving device adopts a single motor, a gear pair, a worm and worm gear pair, a two-way controllable overrunning clutch and an output shaft and is connected with a three-position isolation/grounding switch through a shaft coupling so as to realize the operations of closing, opening and grounding; a frame is provided with position-limiting clutch pin shafts in the closing position and the grounding position respectively, and a pair of detents, a half shaft and a tripping electromagnet are arranged in the opening position of the frame, thereby realizing the positioning for closing, opening and grounding and the mechanical clutch protection; a chain wheel transmission/bevel gear pair is used for realizing the state indication of the three positions on the front surface and the side surfaces and the position switching of a three-working-position auxiliary switch; and the manual interlocking device can realize manual-electrical interlocking and electromagnetic interlocking among switching elements. The three-working-position electric operation mechanism is simple in structure, stable in output angle, accurate in positions and unrelated to the inertia of a system, the mechanical-electrical interlocking is realized between isolation and grounding, the production and the use are safe, the reliability is very high, the cost is low, and the operations of closing a break and opening the break can be performed rapidly.

The invention belongs to the technical field of electrical control cabinets, and discloses a cellular automatic electrical control cabinet with flame-retardant and fire-extinguishing functions. The control cabinet comprises an outer cabinet, a fire-extinguishing pipeline, a temperature sensor, a smoke sensor, a fire-extinguishing assembly and a processing device, wherein the fire-extinguishing pipeline, the temperature sensor, the smoke sensor are arranged in the outer cabinet, and the fire-extinguishing assembly and the processing device are arranged outside the outer cabinet. At least one fire extinguishing pipeline and at least one fire extinguishing assembly are arranged; the fire extinguishing assembly comprises a fire extinguisher and a driving base, and the fire extinguisher is mounted on the driving base; the processing device comprises a PLC processor and is electrically connected with the driving base; real-time monitoring is performed by the temperature sensor and the smokesensor to determine whether a fire occurs in the control cabinet, and if yes, a fire extinguishing device is cooperated to realize timely fire extinguishing so as to effectively reduce losses of the control cabinet in case of fire; and the fire extinguishing device is composed of the fire extinguishing pipeline, the common fire extinguisher and the driving base, production cost is low, the fire extinguisher and the driving base can be detached and replaced, and use cost is low.

The invention provides a marine outboard motor which comprises a casing, a bracket, a motor body, a spindle, a control handle assembly, an output device, a controller and a water pump. The motor body and the controller are fixedly connected in the casing, the output device is connected and assembled with the casing, the motor body is in drive connection with the output device through the spindle, and the control handle assembly is connected and assembled with the casing. The control handle assembly comprises a rotary handle, a connecting handle, a connecting rod and a potentiometer; one end of the connecting handle is fixedly connected with the casing, one end of the rotary handle sleeves the other end of the connecting handle, one end of the connecting rod is fixedly connected with the rotary handle, and the potentiometer is connected and assembled with the connecting handle and electrically connected with the controller. The motor body is provided with a cooling passage, the controller is also provided with a cooling passage, and the cooling passage of the motor body, the cooling passage of the controller, the water pump and a connecting pipeline form a cooling system. The marine outboard motor is simple in structure, good in reliability and convenient to assemble and mount. The motor body and the controller are prevented from being burnt out even when a ship runs astern for a long time.

The invention discloses a PFC circuit and electronic equipment comprising the same. The IGBT module of the PFC circuit comprises a plurality of identical and parallel IGBTs, wherein the emitter of each IGBT is grounded, the collector of each IGBT is connected between an inductive module and a switching diode module, and the grid of each IGBT is connected with a driving control module; the driving control module controls the simultaneous conduction and the simultaneous cut-off of the IGBTs. The electronic equipment and the PFC circuit control the simultaneous conduction of the IGBTs; when the current generated by the inductive module is overlarge, the IGBTs are used for shunting; even if the IGBTs with small current are selected, the IGBTs cannot be burnt; thus, the safe and stable working of the circuit is ensured, the IGBTs with large current and large power are not needed, and the electricity consumption of the IGBTs and the circuit cost are reduced.

The invention discloses a display panel and a signal transmission method thereof. The display panel provided by the invention comprises a substrate and at least a first driving chip and a second driving chip. The first and second driving chips are directly arranged on one side of the substrate; the first driving chip is at least provided with a first power supply receiving solder pad, first and second auxiliary solder pads and a first auxiliary wire; and the second driving chip is at least provided with a second power supply receiving solder pad. The first power supply receiving solder pad andthe first auxiliary solder pad are used for receiving system voltages respectively and the first auxiliary solder pad is also connected with the second auxiliary solder pad through the first auxiliary wire to transmit the system voltage to the second power supply receiving solder pad from the second auxiliary solder pad.

To solve the problems of the prior art, the invention provides a wide-duty-ratio MOSFET isolation drive circuit. A rising edge and a falling edge of a PWM signal are captured and then an edge pulse signal is formed, the edge pulse signal is input to a primary side of a transformer, an output pulse is shaped at a secondary side of the transformer and finally recovered to be a PWM drive waveform with positive and negative voltage output, and then an MOSFET can be driven. Signals and energy are instantly transmitted at the edge of PWM, so the MOSFET isolation drive circuit is wide in isolation output wide duty ratio, which can reach 0-99.5%. A primary side pulse generation mode is different from a conventional capacitor-transformer combination driving mode, so a self-excitation frequency problem does not exist. If an input duty ratio abruptly changes, the output can follow with the change. No low-level gain phenomenon will occur, and a switch tube will not be connected for short time and burn out.

The invention relates to a novel battery module which comprises cell modules, insulating plates, fixing steel frames, aluminum sheets, fixing bolts and nuts, wherein cells in the cell modules are arranged in the form of alternate anode and cathode; the polarities between any two adjacent cells are oppositely arranged; the quantity of the cell modules is more than three; the aluminum sheets are arranged between adjacent cell modules; the quantity of aluminum sheets is one set less than the quantity of the cell modules; the quantities of the aluminum sheets, the insulating plates and the fixing steel frames are two sets; the two sets of aluminum sheets, insulating plates and fixing steel frames are respectively arranged at the two ends of the outmost two cell modules from inner to outer and are fixed through the cooperation of the bolts and nuts, so that the assembling efficiency is increased and the safety performance is promoted.

The invention relates to a method for increasing the testing safety of a high-power semiconductor amplifier. During noise power density testing, the method includes the steps of firstly, inputting safety input power PIN-safe from the input port of the high-power semiconductor amplifier; secondly, determining the output power POUT of the high-power semiconductor amplifier, and if the POUT is largerthan an upper limit, determining that an appropriate band-stop filter is not connected to the output port of the high-power semiconductor amplifier or no band-stop filter is connected to the output port of the high-power semiconductor amplifier. By the method, performance index testing during the testing of the high-power semiconductor amplifier, and the burning of precious testing instruments such as a vector network analyzer and a spectrometer.

The invention discloses a time sequence protection circuit for controlling a depletion type power device. The time sequence protection circuit comprises a DAC, a first inverse phase proportional operational circuit, a second inverse phase proportional operational circuit, a voltage comparator, an enable signal output module and a PMOS tube control circuit, wherein the DAC comprises a first voltageoutput end and a second voltage output end; the first end of the first inverse phase proportional operational circuit is connected to the first voltage output end, and the second end of the first inverse phase proportional operational circuit serves as a grid voltage output end; the second inverse phase proportional operational circuit is connected between the second end of the first inverse phase proportional operational circuit and the negative input voltage end of the voltage comparator; the positive input voltage end of the voltage comparator is connected to the second voltage output end;and the enable signal output module is used for outputting an enable signal to the PMOS tube control circuit when the voltage comparator outputs the low level. The technical problem that the depletion type power device is burnt due to the fact that the inverse phase proportional operational circuit is damaged or the grid voltage is not appropriate in the prior art is solved.

The present invention relates to the field of electric motors, specifically a convenient drainage type electric motor, which includes a stator and a rotor, and also includes a casing, a blocking device, a water level sensor, a controller, and an alarm. The casing includes a side plate and a bottom plate, The bottom plate is provided with drainage holes, and the blocking device includes a rubber plug, a top plate and a cylinder; the top plate includes a horizontal plate and vertical plates symmetrically arranged on both sides of the lower end surface of the horizontal plate; one end of the cylinder is fixed On the lower end face of the transverse plate, the other end of the cylinder is fixed on the upper end face of the rubber plug. Compared with the prior art, the structure of the motor is ingeniously designed, which can facilitate the discharge of condensed water without causing the motor to burn out, and has a long service life. At the same time, the invention can realize automatic drainage without manually extracting the rubber plug, which saves manpower.

The invention provides a radio frequency system, wireless communication equipment and a protection method of a power amplifier. The radio frequency system comprises a radio frequency path used for transmitting a radio frequency signal in a first frequency band; the power amplifier is positioned on the radio frequency path and is used for performing power amplification processing on the radio frequency signal; and the control module is used for controlling the input power of the power amplifier, so that the input power of the power amplifier is smaller than the maximum allowable input power of the power amplifier. In the embodiment of the invention, the input power of the power amplifier is controlled to be lower than the maximum allowable input power of the power amplifier, the PA is protected from being burnt, and the reliability of the PA is improved to a certain extent.

The invention discloses a high-temperature-resistant panel for a high-voltage power distribution cabinet. The high-temperature-resistant panel comprises an aluminum alloy substrate; a rock wool thermal-insulation layer is adhered to the inner side of the aluminum alloy substrate by an engineering adhesive; and the aluminum alloy substrate is wider than the edge of the rock wool thermal-insulationlayer by 0.5mm to 1mm. Besides, fireproof decorative panels are arranged on the surface of the outer side of the aluminum alloy substrate and the surface of the inner layer of the rock wool thermal-insulation layer. The high-temperature-resistant panel has advantages of excellent abrasion-resistant, high temperature-resistant, cutting-resistant, and penetration-resistant performances, good cleaning effect, good moisture proof performance, high fastness, good impact-resistant property, and high flexibility.