9results about How to "Input voltage is stable" patented technology

The invention belongs to the technical field of Internet of Things sensing systems, and particularly relates to a low-power-consumption Internet of Things sensing system based on thermoelectric power generation and energy supply, which comprises a power generation module, an electric energy management module, a data collection module and a wireless transmission and storage module. The power generation module comprises a heat dissipation unit, a thermoelectric power generation unit and a heat pipe heat conduction unit. The energy management module comprises a low-power-consumption low-voltage boosting unit, an electric energy collecting unit, an energy storage unit and a discharging voltage stabilizing unit. The data collection module comprises a microprocessor main control chip unit with a built-in Wi-Fi module, a serial port communication circuit unit, a temperature and humidity collection unit, a sound loudness collection unit and a working state warning unit. The wireless transmission and storage module comprises an MQTT wireless transmission network server unit, an equipment client unit, a WEB client unit and a database client unit. The problem of power supply of the wireless sensor working outdoors is solved, power consumption of system operation is reduced, and long-term effective operation of the system is guaranteed.

The present invention discloses a power dual-compensation switched reluctance motor drive system and control method, including: an active power compensation circuit for absorbing DC bus pulsating power to achieve primary power compensation; a primary power compensation circuit control module for driving and controlling the primary side active power compensation circuit; a switched reluctance motor power main circuit for driving the switched reluctance motor; and a secondary power compensation control module for generating a compensation signal to drive and control the switched reluctance motor power main circuit to achieve secondary power compensation. The present invention can achieve that when a small-capacity film capacitor is used to replace a large-capacity electrolytic capacitor in a switched reluctance motor drive system, the motor can still effectively and stably output power, and the control method is simple and reliable.

The utility model provides a voltage sampling circuit and a household electrical appliance, the voltage sampling circuit comprises a filter circuit, a rectification circuit, a load circuit and a sampling circuit, the sampling circuit comprises a first voltage division circuit, a second voltage division circuit and an operational amplifier module, the first voltage division circuit comprises a plurality of resistors, and the second voltage division circuit comprises a plurality of resistors; a first sampling point can be arranged between any resistors in the first voltage division circuit, the second voltage division circuit comprises a plurality of resistors, and a second sampling point is arranged between any resistors in the second voltage division circuit. The technical problem that the alternating current power supply voltage change signal cannot be accurately acquired is solved.

The utility model discloses a hoistway lighting device for elevator maintenance, which comprises a mounting seat, the upper surface of the mounting seat is fixedly connected with a circuit board, the upper surface of the circuit board is fixedly connected with a group of LED light beads, the left side surface of the circuit board is fixedly connected with a first fixed base through a wire, and the left side surface of the circuit board is fixedly connected with a second fixed base through a wire. And the front surface of the first fixed base is fixedly connected with a light sensor. According to the device, the light sensor is matched with the controller, the brightness can be automatically reduced under the condition that light is sufficient, the brightness can be automatically increased under the condition that the light is dark, sufficient illumination can be guaranteed, then the touch panel is operated to be matched with the controller, the opening and closing time of the LED light beads on the circuit board can be set, and finally the power module is connected with a power source. And through the power supply converter and the voltage stabilizing circuit assembly, the stability of the input voltage can be ensured, the normal work of the lighting device can be ensured, the phenomenon of unstable lighting or damage caused by voltage fluctuation is avoided, and the device is very practical.

The invention discloses a control system and method for a torpedo ladle cover adding and taking device, equipment and a medium, and belongs to the technical field of metallurgy. The control system comprises a battery pack, a high-frequency power module, an inverter, a cover adding and taking device and a controller, the cover adding and taking device comprises a tank cover, and the tank cover is used for covering a tank opening of the torpedo tank; the battery pack, the high-frequency power module, the inverter and the cover adding and taking device are sequentially connected, and the high-frequency power module is connected with the controller. The high-frequency power supply module is used for adjusting the output voltage of the battery pack to a preset target direct-current voltage and outputting the voltage to the inverter or the controller; the inverter is used for converting the target direct-current voltage output by the high-frequency power supply module into a preset target alternating-current voltage and outputting the preset target alternating-current voltage to the cover adding and taking device; the controller is used for controlling the cover adding and taking device to conduct cover adding and taking operation. When the torpedo ladle is located at any position, the control system has driving force to carry out cover adding and cover taking operation.

This utility model discloses a power supply circuit, belonging to the field of electric vehicle instrument technology, specifically relating to a power supply circuit for an electric vehicle instrument, including: a switching regulator U1, an input filter component, an output filter component, a voltage divider network component, and a Zener diode D1; this utility model adds a constant voltage circuit to the power supply circuit, which stably converts a wide input voltage range into DC output, while the input filter component filters out noise from the input power line and reduces the backflow of high-frequency current ripple generated during the operation of the switching regulator. The output filter component smooths the high-frequency pulsating current generated by the switching action into a relatively stable DC voltage and further filters out high-frequency noise. In addition, the voltage divider network component samples the voltage and feeds it back to the switching regulator U1 to adjust the output voltage to ensure that it is maintained at a set constant value, thereby achieving stable output voltage.

The invention relates to the technical field of intelligent electric appliances, particularly provides an air conditioner control method, electronic equipment, a storage medium and an air conditioner, and aims to solve the technical problem that serious electromagnetic noise occurs when an air conditioner motor runs. In order to achieve the purpose, the method comprises the steps that the three-phase current of a motor is obtained in response to operation starting of the air conditioner; obtaining a corresponding operation voltage value based on the three-phase current; judging whether the running voltage value is within a preset voltage range or not; and if not, acquiring a corrected voltage value corresponding to the operation voltage value, and controlling the motor to operate based on the corrected voltage value. Through the implementation mode, the operation voltage can be calculated through the three-phase current, whether the operation voltage is in the normal voltage range or not is judged, and if not, corresponding correction is carried out in time according to the abnormal condition to keep the stability of the input voltage of the motor, so that the rotating speed of the motor is stable, electromagnetic noise generated during operation of the motor is reduced, and the service life of the motor is prolonged. The satisfaction degree of a user to the air conditioner is improved, and the use experience of the user is improved.

The present invention discloses a fault detection device, which includes: a control module, a storage module and at least one interface communication module; the interface communication module is connected to the corresponding mainboard interface in the device to be tested; the control module is connected to the storage module and the at least one interface communication module, and is used to perform a pin cold soldering test on at least one mainboard interface to detect whether there is a cold soldering fault on the voltage input pin in at least one mainboard interface; and to perform a performance test and / or a stress test on at least one mainboard interface to detect whether there is a transmission fault on at least one mainboard interface. The technical solution of the embodiment of the present invention realizes the cold soldering fault detection of the voltage input pin, ensures the stability of the input voltage of the interface, and improves the safety performance of the interface. At the same time, it realizes the transmission fault detection of the data transmission pin, and improves the data transmission efficiency and data transmission accuracy of the interface.

The invention relates to a battery-based low-power-consumption power supply method for a power supply. The method comprises the following steps: S10, judging whether an MCU (Microprogrammed Control Unit) obtains a low-power-consumption mode trigger signal or not; if yes, skipping to the step S20; and if not, the DC-DC is maintained in an on state, the output voltage of the DC-DC to the power supply pin of the MCU is V1, the output voltage of the battery to the power supply pin of the MCU through the resistance voltage division circuit is V2, V2 is larger than 0 and smaller than V1, and the input voltage of the power supply pin of the MCU is V1. And S20, the MCU sends a turn-off signal to the DC-DC to control the turn-off of the DC-DC, the output voltage of the DC-DC to the power supply pin of the MCU is 0, the output voltage of the battery to the power supply pin of the MCU through the resistance voltage division circuit is V2, and the input voltage of the power supply pin of the MCU is V2. The invention also provides a battery-based power supply. When the low-power-consumption mode is switched, the DC-DC is switched off, and the voltage input source of the MCU is switched from the DC-DC to the resistance voltage division circuit of the battery, so that normal operation of the MCU can still be maintained under the condition that the DC-DC is switched off, and the energy consumption of a product in a standby state is effectively reduced.