41results about How to "With overcurrent protection" patented technology

The invention relates to the stainless steel inner pipe electrolytic polishing treatment, an automatic operation is employed, the processing parameter is automatically adjusted, thereby the processing quality stabilization can be guaranteed. An electrolytic polishing solution is introduced in the stainless steel pipe, on one hand, the bubbles generated in the electrolytic polishing treatment process can be timely discharged, and on the other hand, the residues generated during the electrolytic polishing treatment can be timely discharged. In addition, during the process of stainless steel inner tube electrolytic polishing, the stainless steel pipe is capable of rolling, the bubbles can be prevented from rising to top of the pipe to influence the electrolytic polishing effect on the top of the inner pipe. The rolling speed is adjustable, the electrolytic polishing solution is environment-friendly type liquid medicine, the current passed through the unit area is small, compared with a traditional electrolytic polishing solution, the power consumption is smaller, and the energy saving performance is provided. The electrolytic polishing device is a stainless steel pipe inner electrolytic polishing special machine, and can be used for electrolytically polishing the stainless steel pipes with various calibers. The device of the invention has the advantages of high automation degree, environmental protection, energy saving, high production efficiency and good polishing effect.

The invention relates to a direct current motor control drive module, belonging to the electronic technical field of direct current motor control drive. The module comprises a bridge drive circuit, a peak suppression and absorption circuit, a front drive control circuit, a pulse width modulation signal generating circuit, a real-time sampling circuit, a linear isolating circuit, an overcurrent protection circuit, a control signal isolating circuit, and a voltage converting circuit, and the output end of the bridge drive circuit is connected with a direct current motor. The direct current motor control drive module of the invention has the outstanding advantage that the operating requirements of stably tracking the direct current motor drive of a servo system by all photoelectric devices in the sea, land and air fields can be met, and the module is free from heat dissipation, interference and noise, and has low cost, small space usage, quick dynamic response, stable performance, safety and reliability.

Provided by the invention is a digital train broadcasting transmitter that comprises a power supply module, an output control module, a control main board and an output display. An input terminal of a power filter is connected with a 48-V train power supply and an output terminal thereof is connected with a rectification circuit; a voltage sampling circuit, a current sampling circuit, a power amplification board is connected in parallel with the rectification circuit; a switching board for switching of a main power amplifier and standby power amplifier is connected with a primary coil of an output transformer and a secondary coil of the output transformer is connected with a broadcast output binding post; the main power amplifier and the standby power amplifier are connected with the control main board; control signals and sampling signals are inputted into the control main board; and the control main board is connected with an emergency control switch, the output display, a monitoring loudspeaker, a pre-stage amplification board, a radio antenna and an AMR module. According to the invention, the beneficial effects of the digital train broadcasting transmitter are as follows: microphone broadcasting, built-in microphone broadcasting, wireless microphone broadcasting, voice synthesis broadcasting, and radio broadcasting can be realized and insertion broadcasting can also be carried out. Meanwhile, train state monitoring is carried out according to the train broadcasting requirement.

The invention discloses an adjustable switch power supply based on a BUCK circuit. The adjustable switch power supply comprises a first linear voltage-stabilizing power supplying circuit, a low-voltage switch-off and soft-start circuit, a PWM control circuit, a constant-voltage constant-current control circuit, a bootstrap suspension driving circuit, an over-current switch-off circuit, an MOS transistor, a constant-current load circuit and a voltage and current sampling circuit. The first linear voltage-stabilizing power supplying circuit provides a voltage-stabilizing power supply of a system, the low-voltage switch-off and soft-start circuit is used for low-voltage protection and soft starting, and the bootstrap suspension driving circuit is used for driving the MOS transistor by adopting push-pull output; the constant-current load circuit is used for providing load for system output to achieve stable output of the system, the voltage and current sampling circuit is used for collecting the output voltage or current of the system, the over-current switch-off circuit is used for over-current protection, and the constant-voltage constant-current control circuit is used for feeding back and controlling the duty ratio of PWM output to adjust the output voltage or current of the system. The adjustable switch power supply outputs constant voltage and constant current and automatically conducts switching, and the output voltage and current are continuously and linearly adjustable.

The invention relates to the light-emitting diode (LED) manufacturing field and provides a LED driving power supply. The LED driving power supply comprises a power input end, an electro magnetic compatibility (EMC) circuit, a rectifying circuit, a voltage conditioning circuit, a filtering circuit, an output current voltage detecting circuit and an LED lamp at the output end of the output current voltage detecting circuit, and further comprises a constant current and constant voltage controlling circuit, wherein the power input end, the EMC circuit, the rectifying circuit, the voltage conditioning circuit, the filtering circuit, the output current voltage detecting circuit and the LED lamp are connected in sequence, the constant current and constant voltage controlling circuit is connected with an output end of the output current voltage detecting circuit and an input end of the voltage conditioning circuit, an inductance and a piezoresistor are arranged between the rectifying circuit and the voltage conditioning circuit, the inductance is connected with the rectifying circuit and the voltage conditioning circuit in series, the piezoresistor is connected with the rectifying circuit and the voltage conditioning circuit in parallel, and the input end of the piezoresistor is connected with the output end of the inductance. The LED driving power supply has the advantages that elements with big sizes, high failure rates and high prices are greatly reduced, the structure is simple and reasonable, the cost is lowered and application is stable and reliable. The inductance is added between the rectifying circuit and the voltage conditioning circuit, so that undesirable effects due to the fact that different-mode signals transit to a power grid are restrained, meanwhile the piezoresistor is added, and thereby the ability of the power supply to reject outside surge is improved.

The invention relates to a super lightning protection mobile socket which comprises a shell body, a circuit board, an overcurrent sensor, a zero sequence mutual inductor, a test button, a reset button, a control circuit, an electromagnetic tripping device, two static contact pieces and two moving contact pieces on the N pole and the L pole; the electromagnetic tripping device consists of a framework, a main trip coil, a short circuit trip coil, an iron core and a spring; one end of each of the two moving contact pieces is arranged on the circuit board; an insulated pothook is arranged on two moving contact pieces; the other end of each of the two moving contact pieces is provided with a moving contact; an offsetting spring is sleeved on the reset button; the bottom of the reset button is provided with a reset pothook configured corresponding to the insulated pothook; the reset pothook is connected with the iron core; one end of each of the two static contact pieces is provided with a static contact; the other end of each of the two static contact pieces is arranged on the circuit board; the N pole runs through the zero sequence mutual inductor, bends outwards and traverses the overcurrent sensor; simultaneously, the L pole runs through the zero sequence transformer and the overcurrent sensor; a winding of the zero sequence mutual inductor is accessed to the control circuit. The invention has rapid speed of cutting off the power supply, is immediately grounded for protection and has high sensitivity and good reliability.

The invention discloses a mobile phone and electric vehicle dual-purpose networking intelligent charging integrated machine which is an integrated wall-mounted intelligent charger and comprises a charger shell, a wall-mounted mounting assembly, a user identification system, a mobile Internet access system, a man machine operation system, an intelligent payment settlement system, a coin payment system, a charging capacity display system, a network communication system, an automatic charging system, an intelligent processing system, and connecting lines. The intelligent processing system comprises an information processing system, an intelligent motherboard, a wireless router, and a wireless network card, and the systems are connected through the connection lines. The mobile phone and electric vehicle dual-purpose networking intelligent charging integrated machine conforms to the development needs of the mobile Internet, Internet+, and smart cities and is connected to the mobile Internet, a new 'smart' way of life is formed, a mobile phone charger and an electric vehicle charger are integrated into one body, and the networking intelligent charging of a mobile phone and an electric vehicle is realized.

The invention provides a vehicle-mounted inverter circuit, including: a boost conversion circuit, an intermediate filter circuit, an inverter circuit, a microcontroller MCU, an output filter circuit, an AC voltage input detection circuit, an AC voltage effective value detection circuit, and a switcher K1, voltage feedback circuit, battery voltage monitoring circuit, internal voltage supply circuit, and at least one current sensor CT; the input terminal of the boost conversion circuit is used to connect the battery voltage Vbat, and the output voltage is higher than Vbat under the control of the microprocessor MCU The bus voltage Vbus; after the bus voltage Vbus is filtered by the intermediate filter circuit, it is input to the inverter circuit, and the inverter circuit is used to generate the AC voltage for output; the inverter circuit is connected to the AC output terminal of the inverter through the output filter circuit; the voltage feedback circuit is respectively The feedback voltage signal is generated and output to the microcontroller MCU and the boost conversion circuit; the invention can automatically switch the external AC voltage.

The invention belongs to the technical field of circuit electronics, and relates to a novel ultra-wide input DC step-down circuit. The novel ultra-wide input DC step-down circuit comprises a BUCK structure basic circuit, a voltage stabilizing circuit, a charge pump circuit, a constant current load circuit, a voltage and current acquisition circuit, a constant-voltage constant-current control circuit and a power supply management circuit, wherein the input end of the power supply management circuit is connected to the input end of a power supply and the constant-voltage constant-current controlcircuit; the output end of the power supply management circuit is connected to the input end of the voltage stabilizing circuit and the input end of the BUCK structure basic circuit; the output end of the voltage stabilizing circuit is connected to the electric input end of the constant current load circuit through the charge pump circuit; the output end of the voltage stabilizing circuit is alsoconnected to the input end of the constant-voltage constant-current control circuit; the output end of the BUCK structure basic circuit is respectively connected to the input end of the constant current load circuit and the input end of the voltage and current acquisition circuit; and the output end of the voltage and current acquisition circuit is connected to the input end of the constant-voltage constant-current control circuit. The step-down circuit is wide in input direct-current voltage range and capable of achieving automatic switching of the constant voltage and constant current.

The invention relates to a digital tube display LED shadowless lamp circuit with a double dimming function. The digital tube display LED shadowless lamp comprises a power source input device and a power source processing device used for processing the power source input device which is connected with an LED driving device, a relay driving device and a micro processing chip, and the relay driving device is connected with the micro processing chip. The digital tube display LED shadowless lamp circuit has the advantages that the circuit is high in stability, free of stroboflash, harmless for eyes and long in service life and has the double dimming function, and starting current impact strength of LED lamp beads is reduced.

The invention discloses a special integrated circuit for a vehicle flasher. The integrated circuit comprises a power input terminal for supplying power, a power output terminal for supplying power to a peripheral circuit, a ground terminal, a peripheral RC (resistor-capacitor) oscillation circuit interface, a detection terminal, an output terminal and a circuit for integrating the following circuits: an oscillator, a frequency divider, a flash logic processing module, a comparator module, a drive circuit and a power. The integrated circuit is characterized in that the oscillator receives oscillation signals output by a peripheral RC oscillation circuit via the peripheral RC oscillation circuit interface to generate clock signals and outputs the clock signals to the frequency divider and the flash logic processing module; and the frequency divider receives the clock signals output by the oscillator, simultaneously receives reset signals output by the flash logic processing module, processes the clock signals and the reset signals to generate pulse signals and outputs the pulse signals to a flash logic processing circuit. The integrated circuit has the characteristics of good temperature property and high reliability, and can be widely applied to the flashers of vehicles, motorcycles and electric bicycles.

The invention discloses a motion control and diagnosis system for a nuclear power in-service inspection automation device, which comprises an electric control part, an emergency stop device and a cable connected with each component of the electric control part; an electric control box comprises a motion controller, a motor driver, an industrial computer, an analog quantity conversion module, an encoder module and a power supply module; the encoder module is electrically connected with the motor driver, and the motion controller receives a motion instruction output by the industrial computer, sends an electric signal to the motor driver to drive the motor to move, reads an encoder module signal and transmits the encoder signal to the industrial computer; the analog quantity conversion module converts the analog quantity in the motor driver into a voltage signal which can be read by the motion controller and then transmits the voltage signal to the industrial computer. An integrated design scheme is adopted, a motion controller and a motor driver are integrated, and the advantages of being easy and convenient to operate, small in size, rapid in connection and the like are achieved; various protection functions such as sudden stop protection and overcurrent protection are achieved, and damage to an original automatic device is prevented.

The invention discloses a solar light-emitting coal yard scale plate which comprises a scale shell, a solar power generation panel, a solar controller, LED lamps and a storage battery; the solar powergeneration panel is mounted at the top end of the scale shell, the solar controller, the storage battery and the LED lamps are all mounted in the scale shell, hollowed-out numbers are engraved in thefront face of the scale shell, and the LED lamps correspond to hollowed-out numbers. An output line of the solar power generation panel is connected to a wiring end of a solar controller photocell; aconnecting wire of the storage battery is connected to a wiring end of the solar controller; a connecting wire of the LED lamps is connected to the load output end of the solar controller; solar energy can be conveniently stored, electric energy is provided for work of the LED lamps at night, numbers on the front face of the scale shell are brightly presented in front of coal yard workers, and abucket wheel machine driver can conveniently execute coal yard stacking and taking operation.

The invention discloses a new wiring board for classification and management of jacks, which comprises a wiring board body and a suction cup. A master control switch, an overcurrent protection module, a first socket module, a second socket module and a third Socket module; the socket in the first socket module has a power-on reminder function, the socket in the second socket module has a timing automatic power-off function, and the socket in the third socket module is an ordinary socket. The wiring board of the present invention can realize the integration of multiple functions of the socket by classifying the sockets for modular management, is convenient and safe to use, and is especially suitable for campus dormitories.

The invention provides a three-phase DC brushless motor control system. The three-phase DC brushless motor control system comprises a DC brushless motor, a driving circuit, a control unit, a startingdevice, an overcurrent protection circuit and a phase maintaining device, wherein the overcurrent protection circuit is used for deciding whether the DC brushless motor is closed or not according to the size of a driving current of the DC brushless motor, and the phase maintaining device is used for deciding whether a rotor is maintained at a current phase or not according to a position state of the rotor of the DC brushless motor.