Control circuit capable of adjusting leading edge blanking time and power supply switching-over system

The invention relates to a controlling circuit for adjusting the leading edge shading time, which is applied to a power conversion system. The controlling circuit comprises a changeable charging current generation circuit, a capacitor, a charging and discharging switch coupled with the capacitor, and a first comparator, wherein the changeable charging current generation circuit is used to generate charging current proportionate with the voltage valve of a feedback signal according to the feedback signal; when the power switch of the power conversion system is turned on, the charging and discharging switch is cut off, and when the power switch is cut off, the charging and discharging switch is turned on; the input terminal of the first comparator is connected with the capacitor and the charging and discharging switch, and when the charging voltage of the capacitor reaches the reference voltage of the first comparator, the output signal of the first comparator enables the power conversion ...

Control circuit, power converter and control method

A control circuit is applicable to a power converter. When a power switch of the power converter is conducted, a current comparison circuit compares the current flowing through the power switch and areference value via a multi-function terminal. When the current reaches the reference value, the current comparison circuit closes the power switch, and when the power switch is closed, an under voltage detecting circuit detects whether the input voltage of the power converter is lower than a preset value via the multi-function terminal.

Capacitor amplifier circuit

Electromagnetic docking control method and device

The invention discloses an electromagnetic docking control method and a device, which adopt an anomalous magnetic moment control plus one-time magnetic moment switching mode, wherein the electromagnetic docking control method includes the following steps: according to the magnetic induction intensity of a target electromagnetic device, the initial speed and initial magnetic moment of a tracking electromagnetic device and the initial distance between the barycenters of the target electromagnetic device and the tracking electromagnetic device, the initial mechanical energy of a docking system is calculated; according to the set switching speed and initial magnetic moment of the tracking electromagnetic device and the initial mechanical energy of the docking system, the switching distance, which corresponds to the switching speed, between the barycenters of the target electromagnetic device and the tracking electromagnetic device is calculated; according to the switching speed, the switching ...

Method and apparatus for processing navigation prompt information

The invention relates to a method and an apparatus for processing navigation prompt information. The method is characterized in that during a navigation process, real pictures of front road of the vehicles and the navigation prompt information corresponding to the front road of vehicles can be obtained; the navigation prompt information is indicated on the real picture to generate the real navigation picture; and the real navigation picture is displayed to the user for performing navigation prompt. The method and the apparatus can solve the problems of error driving due to difficult coupling of a road prompt sign and practical road condition.

Magnetic field generation control device and method

The invention discloses a magnetic field generation control device and a magnetic field generation control method. The device comprises three electromagnetic coils of which the axial directions are located in the directions of three axes of coordinates of a three-dimensional orthogonal coordinate system respectively and the centers are all located in a three-dimensional orthogonal coordinate origin, wherein each electromagnetic coil is provided with a current control device for providing a current and a driving device for driving the electromagnetic coil to rotate independently around the axial direction. According to the magnetic field generation control device and the magnetic field generation control method, the rotation angles of the electromagnetic coils are increased to control the magnetic field generation based on the existing magnetic field generation control method, so that the technical problems that the existing way of controlling a magnetic field intensity only by the current ...

Control circuit, power converter and control method

A control circuit is applicable to a power converter. When a power switch of the power converter is conducted, a current comparison circuit compares the current flowing through the power switch and a reference value via a multi-function terminal. When the current reaches the reference value, the current comparison circuit closes the power switch, and when the power switch is closed, an under voltage detecting circuit detects whether the input voltage of the power converter is lower than a preset value via the multi-function terminal.

Control circuit capable of adjusting leading edge blanking time and power supply switching-over system

The invention relates to a controlling circuit for adjusting the leading edge shading time, which is applied to a power conversion system. The controlling circuit comprises a changeable charging current generation circuit, a capacitor, a charging and discharging switch coupled with the capacitor, and a first comparator, wherein the changeable charging current generation circuit is used to generate charging current proportionate with the voltage valve of a feedback signal according to the feedback signal; when the power switch of the power conversion system is turned on, the charging and discharging switch is cut off, and when the power switch is cut off, the charging and discharging switch is turned on; the input terminal of the first comparator is connected with the capacitor and the charging and discharging switch, and when the charging voltage of the capacitor reaches the reference voltage of the first comparator, the output signal of the first comparator enables the power conversion ...

Development and use technology of impurity removal agent for producing ammonium dihydrogen phosphate ammoniation slurry system from wet-process phosphoric acid

The invention provides a method for producing crystalline ammonium dihydrogen phosphate from wet-process phosphoric acid ammoniation slurry, and relates to the technical field of ammonium dihydrogen phosphate preparation. The ammoniated slurry impurity removal agent ammonium fluoride is prepared through the reaction of the by-product fluosilicic acid and liquid ammonia, the method is reliable, material taking is convenient, the manufacturing cost is low, the impurity removal agent ammonium fluoride and iron, aluminum and magnesium impurities in the ammoniated slurry generate (Fe, Al) Mg (NH4) 2 (HPO4) 2F2 complex precipitate, the (Fe, Al) Mg (NH4) 2 (HPO4) 2F2 complex precipitate is removed along with a filter cake after being filtered, the filtrate is purer, the impurity removal effect is obvious, the impurity removal rate is increased, and the production cost is reduced. The scaling and blocking rate of the system is slowed down and the device operation rate is improved; the yield is ...

Test tube cleaning device

A test tube cleaning device belongs to the technical field of medical instruments and solves the technical problem of test tube cleaning, a waste liquid connector is arranged at the bottom of a cleaning tank, the upper end of a waste liquid recovery tube is mounted in the waste liquid connector, a waste liquid collection tank is arranged below the waste liquid recovery tube, and the bottom of the waste liquid collection tank is communicated with the waste liquid tank; the cleaning column is sleeved with the waste liquid recovery pipe, a test tube brush and a nozzle are arranged on the outer side wall of the cleaning column, a test tube is inversely installed on the cleaning column, the lower end of the cleaning column is communicated with a water storage tank through a pipeline, and a liquid supply pump is arranged in the water storage tank; the transmission system comprises a gear box, a motor, a driving gear, a transmission gear ring and an output gear, the waste liquid recovery pipe ...

Capturing system for capturing and removing low-orbit abandoned satellites and storage method

The invention discloses a capturing system for capturing and removing low-orbit abandoned satellites and a storage method, the capturing system comprises a net-umbrella mechanism, the net-umbrella mechanism comprises a flexible net, a flexible umbrella and a connecting assembly, and the connecting assembly comprises a second tether and a plurality of third tethers; the outer contour of the flexible net is connected with a plurality of mass blocks through first tethers, and the first tethers are distributed in the circumferential direction of the flexible net at equal intervals. The first ends of the third tethers are connected to the outer contour of the flexible umbrella at equal intervals in the circumferential direction, the second ends of the third tethers are connected with the first ends of the second tethers, and the second ends of the second tethers are connected with the center node of the flexible net. The method is applied to the field of in-orbit arresting and removing of the ...

Electric vehicle anti-theft locating device based on Internet of Things technology

The invention relates to a locating device, in particular to an electric vehicle anti-theft locating device based on the Internet of Things technology, and belongs to the technical field of electric vehicle monitoring. According to the technical scheme, the electric vehicle anti-theft locating device based on the Internet of Things technology comprises a pressure sensor which is installed in a battery box of an electric vehicle and used for detecting a pressure value. The pressure sensor is connected with the input end of a controller, and the controller is further connected with a locating module and an alarm. When the pressure value detected by the pressure sensor is not matched with a preset pressure value of the controller, or when locating information exceeds the set moving range in the controller, the controller outputs alarm information through the alarm, wherein the controller acquires the locating information of the electric vehicle through the locating module. The electric vehicle ...

Query and analysis method for electricity marketing data

The invention discloses a query and analysis method for electricity marketing data. The method is realized by a data memory module, a data query module, a data analysis module and an analysis report generation module which are connected in sequence. According to the method, required data can be rapidly queried, and analysis is performed according to the requirement of the integrity of the electricity marketing data; an analysis report is generated according to an analysis result, and therefore the data analysis ability of an electricity marketing system is greatly improved, and the work efficiency of electricity marketing is improved.

Switch type power converter and control circuit for pulse-width modulation

Switch type power converter and control circuit for pulse-width modulation

The present invention relates to a pulse width modulation control circuit which is applied on a switching electric power converter that is feedback-controlled by the primary side. The switching electric power converter comprises a transformer, a power switch, a current sensing resistor and the pulse width modulation control circuit. The transformer is provided with a primary winding, a secondary winding and an auxiliary winding. The pulse width modulation control circuit comprises a sampling hold circuit, a transconductance circuit, an error amplifier and a pulse width modulation generator.

Smart home system based on internet of things cloud computing

The invention relates to a smart home system, in particular to a smart home system based on internet of things cloud computing, and belongs to the technical field of smart homes. According to the technical scheme, the smart home system based on the cloud computing comprises a smart home gateway connected with smart terminals. The smart home gateway is connected with a configuration tool, a remote cloud platform and a client side, and the remote cloud platform is connected with the configuration tool and the client side. The smart home gateway is connected with multiple needed smart terminals and connected with the configuration tool, the remote cloud platform and the client side. The smart home gateway is matched with the configuration tool, the remote cloud platform and the client side, so that control and extended matching of the smart terminals are achieved. The smart home system is compact in structure, high in smart degree, wide in application range, safe and reliable, and use cost ...

Recycling method of ammoniation slag

The invention provides a recycling method of ammoniation residues, and belongs to the technical field of fertilizers. The ammoniation residue recycling method provided by the invention comprises the following steps: mixing ammoniation residues and strong phosphoric acid, dissolving and repulping to obtain a repulping material; in terms of P2O5, the mass concentration of the strong phosphoric acid is 46.5-48%, and the solid content is less than or equal to 2.5%; and producing the phosphate fertilizer from the repulping material. The strong phosphoric acid has high available phosphorus (P2O5) and nitrogen concentration, good liquid fluidity and high acidity, the strong phosphoric acid is used for repulping and dissolving the ammoniated slag, so that the available phosphorus (P2O5) and nitrogen in the ammoniated slag are dissolved in the repulping material, and the content of the available phosphorus and nitrogen in the repulping material is increased, so that the standard of the repulping ...