4results about How to "Constant current" patented technology

The utility model relates to water body sterilization equipment technical field, concretely relates to a novel water body sterilization and purification module, including the casing, is equipped with the blue oxygen generating component that produces blue oxygen of water on the casing, is equipped with the PCB board for sealing and installing drive circuit in the casing bottom, blue oxygen generating component includes the cathode plate of drive circuit electricity connection, anode plate, has the hydroxyl coating on anode plate, the application hydroxyl plating layer electrolytic water technology is applied to the sterilization and purification field in the domestic water body environment, and the bactericidal effect is stronger, and the efficiency is higher, the volume is small and clever, and the structure is simple, produces different sterilization and purification material, carries out sterilization and purification to water body from different aspects such as ion, molecule, and the effect is better, the current is constant, and the sterilization and purification effect is not affected by water quality, and blue oxygen generating component not only has the function of sterilization, but also can purify water body, realizes the dual efficacy of sterilization, purifies water quality, and the application range is wider.

The utility model provides a power supply circuit for a micro differential pressure transmitter and the transmitter. The power supply circuit comprises a power supply management module, a first power supply module and a second power supply module which are connected in sequence. The power management module is connected with an external power supply, and the power management module is used for outputting a first power supply with stable first voltage and first current. The first power supply module is used for outputting a second power supply to supply power to the display module of the transmitter. The third power supply circuit is connected to the common end of the first power module and the second power module. And the third power supply circuit supplies power to the micro differential pressure core body and the transmitting circuit of the transmitter, and the current value of the third power supply circuit is obtained by subtracting the working current of the second power supply module from the first current. According to the utility model, through accurate current control and distribution, stable current supply of the transmitter in different working states is ensured, and the problem of current fluctuation caused by working state switching of the digital micro-differential pressure core body in the existing micro-differential pressure transmitter is improved.

This disclosure provides a charger circuit and charger, comprising: an input module adapted to rectify and filter a supply voltage to generate a transformer voltage; the transformer comprising: a primary coil, a secondary coil, and an auxiliary coil, wherein a first end of the primary coil is coupled to the input module, and a third end of the primary coil is coupled to an adjustment module; the secondary coil is coupled to an output module; the first end of the auxiliary coil is coupled to the adjustment module; the adjustment module is adapted to generate a drive signal with an initial duty cycle when receiving the transformer voltage to select a path between the third end of the primary coil and a first ground, and to detect the feedback current on the first end of the auxiliary coil when the path is selected by means of resistor voltage division, and to adjust the duty cycle of the drive signal according to the magnitude between the feedback current and a preset current to change the current at the first end of the auxiliary coil; and an output module. Using the above technical solution, a constant current value can be provided, improving the charging stability of electronic devices.

This invention discloses a voltage drop detection circuit and a voltage drop detection system. The voltage drop detection circuit includes: a signal receiving module for receiving a set current value; a PLC control module for generating a control signal based on the set current value; an electronic load connected to the PLC control module, which adjusts its resistance according to the control signal; a first power supply module, one end of which is connected to the electronic load and provides a first power supply; an interface module, one end of which is connected to the other end of the first power supply module and the other end of which is connected to the other end of the electronic load, for connecting the load under test; and a signal acquisition module connected to the interface module, for acquiring the voltage signal of the load under test. This invention ensures that the current in the voltage drop detection circuit remains constant, thereby simplifying the voltage drop detection process.