50results about How to "Reduce standby loss" patented technology

The invention provides an awakening control method and a sleeping control method for a wireless power transmission system. When a wireless power receiving terminal approaches a wireless power transmitting terminal, a proximity sensor sends a sensing signal and the signal is transmitted to an I/O interface of a transmitting terminal MCU, and then the level of the interface hops; the transmitting terminal MCU sends a PWM drive signal to an inverter circuit for working; and the wireless power transmitting terminal is awaken. When the transmitting terminal MCU detects hopping of the level of the I/O interface connected with the proximity sensor, communication between the wireless power transmitting terminal and a wireless power receiving terminal is interrupted, or the frequency of sending a PWM drive signal by the transmitting terminal MCU reaches a set frequency threshold value, the transmitting terminal MCU stops sending of the PWM drive signal to the inversion circuit and the wireless power transmitting terminal enters a sleeping state. The wireless power transmission system uses the sensing signal of the proximity sensor as a main criterion, so that the system power consumption is reduced.

The invention discloses a permanent magnet polarization hybrid axial magnetic bearing. The permanent magnet polarization hybrid axial magnetic bearing comprises a rotor assembly and a stator assembly, wherein the rotor assembly comprises a rotating shaft and a rotor dual-thrust disc; the stator assembly comprises a stator shell, an upper stator end plate, an upper permanent magnet, a stator center plate, a lower permanent magnet, a lower stator end plate and a stator magnet exciting coil; the upper stator end plate and the lower stator end plate can form an outer upper air gap and an outer lower air gap together with the outer end surface of the rotor dual-thrust disc respectively, and the stator center plate and the inner end surface of the rotor dual-thrust disc can form an inner upper air gap and an inner lower air gap; the upper permanent magnet and the lower permanent magnet can axially magnetized, and magnetizing directions of the upper permanent magnet and the lower permanent magnet are opposite; the inner and outer air gaps can internally generate a permanent magnet polarization magnetic field, a magnetic field generated by the stator magnet exciting coil can regulate the permanent magnet polarization magnetic field. The magnetic bearing provided by the invention has a firm and reliable structure and high energy density, can be applied in a high-speed operation occasion, and is suitable for a high-speed system which has high power and large capacity.

The invention relates to a display screen dynamic control system and a display screen. The system comprises a receiving card and a first voltage stabilization power supply module. The receiving card is provided with a first pin, the first pin is connected with the enabling end of the first voltage stabilization power supply module, and the power supply output end of the first voltage stabilizationpower supply module is used for connecting a first display module. The receiving card is used for detecting whether a light-emitting signal for driving the first display module exists in display dataor not after the display data is received; and when the display data does not have the light-emitting signal for driving the first display module, the first control signal is sent to the enabling endof the first voltage-stabilizing power supply module through the first pin, so that the first voltage-stabilizing power supply module stops working, the standby loss of the first voltage-stabilizingpower supply module and the first display module is reduced, the waste of electric energy is reduced, and the temperature rise of a box body caused by the standby state of the first voltage-stabilizing power supply module is avoided.

The invention discloses a low-power illuminating system with LED (light-emitting diode) lamps. The system comprises an intelligent AC-DC (alternating current-direct current) power supply converter, the LED lamps, lamp switches and a parallel-type cable, wherein the input end of the intelligent AC-DC power supply converter is connected with an AC power supply; the low-voltage DC output end of the intelligent AC-DC power supply converter is connected with multiple LED lamps; the multiple LED lamps are connected in parallel; each LED lamp is connected with the lamp switch used for controlling the power-on and power-off of the LED lamp in series and then connected to the low-voltage DC output end of the intelligent AC-DC power supply converter; and each LED lamp is internally provided with a high-precision constant-current control circuit. The low-power illuminating system with the LED lamps can be used for solving the problems such as low power supply conversion efficiency, low system power factor, low constant-current control accuracy and the like in LED illumination application with lower cost and prolonging the service life of each LED lamp and the product safety.

The invention discloses a DC24V non-pressure-drop lamp belt and a fixing method thereof. A lamp belt body of the non-pressure-drop lamp belt comprises a flexible circuit board and a plurality of lampbeads, a plurality of grooves are formed in the surface of the flexible circuit board in the length direction, and a conductive groove is arranged in each groove; and a conductive layer is arranged inthe flexible circuit board, the conductive grooves communicate with the conductive layer, two conductive columns are arranged at the bottom of each lamp bead, the conductive columns are inserted intothe conductive grooves, an electric coupler comprises a protective shell and a constant voltage constant current circuit, the protective shell is fixed on one side of the lamp belt body, the constantvoltage constant current circuit comprises a TH1A1075 constant current drive chip and a constant current source, the TH1A1075 constant current drive chip is connected with the lamp belt in series, and the constant current source is connected with each lamp bead in series. A fixing method of the DC24V non-pressure-drop lamp belt makes the lamp belt fix more firmly, and the brightness of the lamp beads at the head and tail ends of the lamp belt is the same.

The invention discloses a communication-based photovoltaic power station power saving control device and method. The device comprises a main contactor KM1, a soft start resistor R1 and a soft start contactor KM2. The power grid is connected with transformers of multiple power generation units through a circuit breaker SW1 and the main contactor KM1 which are connected in series in turn. The soft start resistor R1 and the soft start contactor KM2 are connected in series to form a soft start branch, and the soft start branch is connected in parallel with the main contactor KM1. The device also comprises a power saving controller. The power saving controller is connected with a SCADA system. The power saving control device is mainly applied to the large photovoltaic ground power station. After the photovoltaic inverter is disconnected at night, the high voltage path of the inner ring network bus cabinet of the station can be safely and reliably disconnected to reduce the standby loss in the photovoltaic production area at night, and the high voltage path can be timely connected before photovoltaic working the next day so as to achieve the purposes of saving energy, reducing consumption and reducing the production cost of the photovoltaic power station.

The invention discloses a mobile charging system and a controlling method thereof. The mobile charging system comprises an energy storage battery and a battery management system, wherein the input end of the energy storage battery is connected to a recharging interface of equipment through a switch S1, the output end of the energy storage battery is connected to a charging interface of an automobile through a switch S2 and a switch S3, a DC/AC charging module is arranged between the switch S2 and the charging interface of the automobile, an auxiliary power supply is arranged between the switch S3 and the charging interface of the automobile, the battery management system is connected with a switch S4, a contact A of the switch S4 is connected to the recharging interface of the equipment, and a contact B of the switch S4 is connected to the output end of the auxiliary power supply, a mobile charging controller is arranged between the switch S3 and the auxiliary power supply, the mobile charging controller is connected with a switch S5 used for selecting operation states, and the mobile charging controller can be used for controlling the switches S1-S4 through the operation state of the switch S5. According to the mobile charging system and the controlling method thereof, standby loss of the system is reduced, over discharge of the battery is prevented, the service life of the battery is prolonged, and meanwhile the problem of time sequence in the process of automobile charging and equipment recharging can be solved.

The invention provides a power conversion system and a power supply control circuit and a control chip thereof. The power supply control circuit is used for supplying power to the control drive circuit, the control drive circuit is used for controlling a power device of the power conversion system, and the power supply control circuit obtains power supply input voltage by being coupled with an auxiliary winding of the power conversion system and comprises a switching circuit and a linear circuit; and the output end of the switching circuit and the output end of the linear circuit are compounded and provide power supply voltage for supplying power to the control driving circuit. According to the power supply transformation system and the control chip and the power supply control circuit thereof, the output range of the output voltage can be expanded, meanwhile, reliable power supply and lower standby loss are achieved, and higher power density and power supply efficiency are achieved.

The invention provides a photovoltaic system and a control method thereof. The photovoltaic system comprises a photovoltaic battery pack, a current transformer unit, a first switch, a second switch and a switch power supply, wherein an output end of the photovoltaic battery pack is connected with a first end of the current transformer unit through the first switch; a second end of the current transformer unit is connected with a power grid through the second switch; the switch power supply is provided with a direct current taking branch and an alternate current taking branch; a current taking point of the direct current taking branch is located between the photovoltaic battery pack and the first switch; the current taking point of the alternate current taking branch is located between the second switch and the power grid. The photovoltaic system provided by the invention is capable of reducing the standby loss of the system, increasing the safety and reliability of the system and guaranteeing the service life of the photovoltaic battery pack.

The invention provides an air conditioner and a control device and method thereof. The device comprises a main working module and a low-power-consumption power supply control module, wherein the main working module is used for supplying power to an electricity load when the electricity load of an electric controller of the air conditioner has a power supply demand; and the low-power-consumption power supply control module is connected with the main working module and is used for outputting a voltage control signal to control the magnitude of an external alternating-current power supply when the electric controller of the air conditioner is in a standby state. By arranging the low-power-consumption power supply control module, when the electric controller is in the standby state, the voltage control signal is output to control the size of the external alternating-current power supply, a controllable alternating-current power supply is formed, and the standby loss of the electric controller is reduced, so that the seasonal energy efficiency ratio is increased when the seasonal energy efficiency of the whole machine is calculated.