902 results about "Transfer switch" patented technology

The invention discloses a multi-stage collaborative protection simulation verification method for a subway power supply system, and the method comprises the steps: building an integrated simulation model which comprises an automatic reclosing switch, a spare power automatic switching switch and an automatic change-over switch based on an MATLAB / Simulink platform, and especially carrying out the precise modeling of an advanced compensation function of ATSE. The model is verified by a power-off test, a simulation result and actually measured data are highly consistent in voltage recovery time, an error of advanced compensation action time of ATSE is less than 2ms, and dynamic characteristics of an actual system are accurately reproduced. Model simulation shows that the advanced compensation strategy of the ATSE can effectively control the voltage sag amplitude within 15%, the power supply reliability of the system is remarkably improved, and through strict'simulation-actual measurement 'double-track verification, the model accurately reproduces the dynamic characteristics of the actual system, and shows remarkable advantages in the aspect of improving the power supply reliability.

The invention provides a control system of a snow removal shovel, which belongs to the technical field of snow removal equipment and comprises a hydraulic system and an electric control system. The hydraulic system comprises a lifting and descending oil cylinder, a left-right swing oil cylinder, a hydraulic oil tank and an oil pump connected with the hydraulic oil tank, wherein the lifting and descending oil cylinder and the left-right swing oil cylinder are connected with the snow shovel. An inlet and an outlet of the lifting and descending oil cylinder are connected with an oil return opening of the oil pump and an oil return opening of the hydraulic oil tank through first circulation pipelines respectively. A first electromagnetic directional valve is arranged on the first circulating pipeline; an inlet and an outlet of the left-right swinging oil cylinder are respectively connected with the oil pump and an oil return port of the hydraulic oil tank through a second circulating pipeline; a second electromagnetic directional valve is arranged on the second circulating pipeline; the electric control system comprises a power supply main switch, an ascending and descending switch, a left-right swing switch and a self-weight forced descending change-over switch, wherein the ascending and descending switch and the left-right swing switch are connected to the power supply main switch in parallel; the problem that in the prior art, the snow removing effect is poor due to the fact that the weight of a snow shovel is insufficient can be solved.

The invention discloses a steam sterilizer based on deep reinforcement learning and an intelligent control system, and belongs to the technical field of automatic control. In the intelligent control system, a first subtracter generates a sequence first error signal according to an actually measured temperature provided by a temperature sensor and a set temperature; the second subtracter generates a sequence second error signal according to the actually measured air pressure provided by the pressure sensor and the saturated air pressure of the water vapor determined by the set temperature; the deep reinforcement learning module generates a first state according to the sequence first error signal, generates a second state according to the sequence second error signal, and generates control strategies of the first PID controller and the second PID controller according to the first state and the second state; generating a control strategy of the electronic change-over switch according to the second error signal; the first PID controller controls the working state of the steam generator; and the second PID controller selects the electric control air inlet valve or the first electric control exhaust valve through the electronic change-over switch. Saturated steam can be ensured to participate in sterilization, and the sterilization effect is good.

The invention discloses a high-efficiency UPS (Uninterrupted Power Supply) management system for well logging, and belongs to the technical field of power management. The system comprises a rectifier, a charger, a storage battery pack, an inverter, a change-over switch and a management module. The management module comprises an on-line monitoring unit, a power supply controller and a driving circuit, and the on-line monitoring unit collects UPS power supply operation state parameters in real time; the power supply controller receives and processes the parameters, and generates a control instruction according to a preset threshold value; and the driving circuit converts the control instruction into a driving signal and accurately controls the working state of the inverter. Wherein a signal conditioning circuit is arranged between the sensor module and the data acquisition unit and can perform enhancement and noise reduction processing on an analog signal output by the sensor. The driving circuit effectively resists well logging environment interference through cooperative work of an instruction amplifier, a photoelectric coupler and a field effect transistor, stable operation of a UPS power supply system is guaranteed, accurate control over the working state of an inverter is achieved, and it is ensured that stable and reliable electric power supply is provided for well logging equipment.

An electrical device (100), such as an automatic transfer switch or an electrical power distributor, comprises: a first electrical power input (101); a second electrical power input (102); an electrical power output (121, 122, 123); a switching circuit (105) operable to route electrical power from the electrical power inputs to the electrical power output; the switching circuit comprising: a first switching element (111) to allow, when enabled, power flow from the first electrical power input to the electrical power output; and a second switching element (112) to allow, when enabled, power flow from the second electrical power input to the electrical power output; a controller (110) operable to control the switching circuit to switch to the first electrical power input or the second electrical power input for selecting which of said electrical power inputs is to supply electrical power at the electrical power output; wherein the electrical device is operable to determine a timing sequence of switching between the first electrical power input and the second electrical power input.

A dual power switching system selects a first power source or a second power source to supply power to a load coupled to an inductive device. The dual power switching system includes a first thyristor, a second thyristor, a third thyristor, a fourth thyristor, and a controller. The controller calculates a total magnetic flux according to a current magnetic flux of the inductive device and an expected magnetic flux of the second power source. When the power-supplying source is switched, the controller turns off the first thyristor and the second thyristor, and determines whether a commutable time is reached according to a power parameter of the first static transfer switch and the second static transfer switch. When the commutable time is reached, the controller correspondingly turns on at least one of the third thyristor and the fourth thyristor according to the total magnetic flux being less than a threshold.

Combined charging / discharging circuit with an energy storage terminal (A+, A-), an energy source terminal (PE, NE), a resistor (R), a series switch (L), a cross-switch (Q), and a controller (C) which is drivingly connected to the series switch (L) and to the cross-switch (Q), which together are designed as a changeover switch, wherein the resistor (R) connects a first potential (A+) of the energy storage terminal to a connection point (P) at which the series switch (L) and the cross-switch (Q) are connected to one another, the series switch (L) in a pre-charging state connects the resistor (R) to a first potential (PE) of the energy source terminal (PE, NE), and the cross-switch (Q) in a discharging state connects the resistor (R) to a second potential (NE) of the energy source terminal (PE, NE), wherein the controller is configured to set the pre-charging state (L1, U1) or the discharging state (Q2, U2),wherein the longitudinal switch (L) and / or the transverse switch (Q) in a connection state connects the first potential (PE) of the energy source terminal (PE, NE) to the first potential (A+) of the energy storage terminal, bypassing the resistor (R), wherein the controller is configured to establish the connection state.

The utility model discloses a novel dual-power multi-standby plug-in low-voltage switch cabinet, which comprises a base, a bus coupler cabinet mounted in the middle of the top end of the base, a first wire inlet cabinet mounted on one side of the top end of the base, and a second wire inlet cabinet mounted on the other side of the top end of the base, drawer type circuit breakers are installed in the middle of the bus coupler cabinet, the middle of the first wire inlet cabinet and the middle of the second wire inlet cabinet respectively, a change-over switch is installed on one side of the top of the front face of the bus coupler cabinet, an automatic switching microcomputer is installed on the other side of the top of the front face of the bus coupler cabinet, and two wire outlet drawers are installed at the bottom of the first wire inlet cabinet and the bottom of the second wire inlet cabinet respectively. According to the novel dual-power-supply multi-standby plug-in low-voltage switch cabinet, the two wire inlet cabinets and the bus coupler cabinet of the low-voltage switch cabinet adopt electrical interlocking to ensure that the three wire inlet cabinets and the bus coupler cabinet cannot be switched on at the same time, and a standby power automatic switching microcomputer and a change-over switch are additionally arranged on the contact cabinet to realize three switching functions of standby power automatic switching, manual operation and stopping.

The present inventive concepts comprise a connected, intelligent transfer switch system that permits remote metering, monitoring and control of energy sources connected to a device both by hardwired and wireless connection, and the method for operating this system is disclosed. The inventive concepts represent a significant improvement upon existing transfer switch systems by incorporating advanced monitoring and control capabilities of all energy resources connected to a building, such as fossil-fuel powered generators, battery storage systems, solar photovoltaic arrays, wind turbines, utility grid connections, controllable loads, or other technologies which generate, store or consume energy. The inventive concepts further provide means for flexible and intelligent operation of these resources through a dedicated network communication connection which enables advanced operational decision-making to determine optimal switching actions and real-time interaction through user-facing digital interfaces.

In one aspect, a transfer switch configured to operate in different transfer modes is provided. The transfer switch includes first and second inputs, first and second contactors, an output, first and second power stages, and a controller. The first and second inputs are configured to couple with first and second power sources, respectively. The first and second contactors are configured to selectively couple with the first and second inputs, respectively. The output is configured to couple with a load. The first and second power stages are configured to conduct electrical power when active. The controller is configured to determine whether a trigger condition has occurred while the first power stage is active, and in response thereto, to open the first contactor and activate the second power stage to transfer the load from the first power source to the second power source.

The invention relates to a coupled inductor current-limiting type hybrid direct-current circuit breaker topology and a working method. The coupled inductor current-limiting type hybrid direct-current circuit breaker comprises a current-carrying part and a breaking part, the current-carrying part is formed by connecting an ultra-fast mechanical switch UFD and a load change-over switch LCS in series, the breaking part comprises a bridge circuit, a first branch circuit, a second branch circuit, a third branch circuit, a fourth branch circuit, a fifth branch circuit and a sixth branch circuit, the fourth branch circuit is formed by connecting a thyristor, a coupling inductor and a primary side inductor in series to form a current-limiting branch circuit, and the fifth branch circuit is formed by connecting a secondary side inductor and a secondary side inductor. The sixth branch is formed by connecting a secondary side inductor of a coupling inductor with a thyristor in series and then connecting the secondary side inductor with a capacitor in parallel; the current limiting of the fault current is realized through the fourth branch, the fault breaking of the primary side inductor of the coupling inductor of the fourth branch is completed through the coupling effect of the secondary side inductor of the coupling inductor of the sixth branch, the peak value of the fault current is obviously reduced, and the breaking time is obviously shortened; the circuit breaker can quickly respond to faults of three working modes of current limiting breaking, reclosing and small current breaking; and the breaking part of the circuit breaker adopts the thyristors instead of the IGBTs, so that the cost of the circuit breaker is reduced.

The technology relates to a method of provisioning power and a switching device or a system implementing such method. The method may include providing a switching device including an automatic transfer switch module, an electronic bypass module in electrical communication with said automatic transfer switch module, a plurality of inlets, and a plurality of outlets. The inlets are connected to different power sources to provide uninterrupted power to the plurality of outlets. The method may also include continuing to provide uninterrupted power upon disconnection of either the automatic transfer switch module or the electronic bypass module from the switching device.

The invention relates to a load transfer switch (1) for a load tap changer (2), comprising at least one vacuum interrupter (30), a handling element (50) which is mechanically connected to the vacuum interrupter (30) on a first end (51) and has a roller (53) on a second end (52), a handling body (10) which has a base body (11) and at least one cam (20), wherein the vacuum interrupter (30) is handled via the handling element (50) by the roller (53) being driven over the handling body (10), at least one part (21) of the cam (20) having a higher strength than the base body (11).

The invention relates to a load tap changer (10) for switching over between winding taps (N1,..., N J ,..., N N ) of a regulatable transformer (1) without interruption, comprising at least one selector unit (30) for preselecting to a selected winding tap (N J ) without power, at least one load switching unit (40) for actually load switching from a previous winding tap (N J _i) to the preselected winding tap (N J ), at least one gear mechanism (50) with a first gear wheel (31) and a second gear wheel (41), wherein the first gear wheel (31) is assigned to the selector unit (30) and the second gear wheel (41) is assigned to the load switching unit (40), a drive shaft (60) which is actuated by a motor drive (70), the first gear wheel (31) and the second gear wheel (41) are directly in mechanical action connection with each other, so that the gear wheels (31, 41) can be actuated simultaneously, the drive shaft (60) can drive the first gear wheel (31) or the second gear wheel (41).

The present application discloses an air-conditioning compressor control method, device, equipment, storage medium and air-conditioning system, which relates to the field of automatic control technology. The method is executed by a control device in an air-conditioning system, and the air-conditioning system also includes an air-conditioning compressor, an automatic transfer switch, and at least two power input ports; the automatic transfer switch is used to power the air-conditioning compressor through at least one of the two power input ports; the method includes: reading first power input status information and second power input status information; in response to the first power input status information indicating that the air-conditioning compressor has no power input, and the second power input status information indicating that at least two power input ports have no power output, when the air-conditioning compressor resumes power supply, controlling the air-conditioning compressor to perform emergency startup. The above scheme can take into account the service life of the air-conditioning compressor and the cooling effect after shutdown and restart by means of status detection and fault detection.

An operating mechanism of a change-over switch comprises an energy storage mechanism, the energy storage mechanism comprises a first energy storage mechanism, a second energy storage mechanism and an overturning piece, the operating mechanism further comprises a stirring piece provided with a stirring piece driving part used for manual operation, and the stirring piece is in linkage connection with the overturning piece. When the shifting piece rotates to the shifting piece first position, the shifting piece middle position and the shifting piece second position, the overturning piece is driven to correspondingly rotate to the overturning piece first position, the overturning piece middle position and the overturning piece second position, and when the overturning piece rotates to the overturning piece first position, the overturning piece middle position and the overturning piece second position, the overturning piece is driven to rotate to the overturning piece first position, the overturning piece middle position and the overturning piece second position. The shifting piece is driven to correspondingly rotate to a shifting piece first position, a shifting piece middle position and a shifting piece second position respectively; the shifting piece is further used for driving the indicating mechanism to indicate the state of the operating mechanism, and / or the operating mechanism is provided with a shifting piece limiting mechanism, the shifting piece has at least two functions at the same time, and the structure can be simplified.

A resistance and inductance current-limiting hybrid high-voltage direct-current circuit breaker topology and a control method thereof. The current-carrying branch of the topology is composed of a UFD and a load transfer switch LCS in series, and the two ends are respectively connected with DC line interfaces. The commutation branch is divided into two pairs, and each group of commutation branch is composed of a thyristor and a plurality of diodes in series. The transfer branch is composed of an IGBT and a thyristor in series. The current-limiting branch is composed of three parallel branches, including a branch composed of a thyristor, a plurality of diodes in series, and a reverse-parallel thyristor connected with a capacitor in series, a reverse-parallel thyristor branch, and a branch composed of an inductor connected with a resistor in parallel and a thyristor in series. The charging branch is composed of a capacitor connected with a thyristor in series and grounded. The breaking branch is composed of an IGBT and a metal oxide arrester MOA in parallel. Based on the thyristor commutation cooperation, the use of a large number of thyristors is reduced, and the cost is reduced under the characteristics of meeting the voltage and current resistance.

The utility model relates to the technical field of electrical control, in particular to a mobile square cabin electrical control box, which comprises a power supply module, a motor driving module, a control module and a connecting module, and is characterized in that the power supply module is respectively connected to the motor driving module and the control module through the connecting module; the power supply module comprises a battery pack, a mains supply access interface, an inverter and a switching power supply, the connection module comprises a power supply interlocking change-over switch, a grounding terminal strip and an air conditioner, the mains supply access interface is connected to the inverter, one path of output end of the inverter is connected with the base station equipment, and the other path of output end of the inverter is connected with the power supply interlocking change-over switch. According to the utility model, through the first interlocking change-over switch and the second interlocking change-over switch, the flexible switching between the commercial power and the power supply of the battery pack is realized, and the working continuity of the mobile square cabin in various environments is improved.

The utility model provides a test box for a rotating speed coil sensor. The test box comprises a box body, an operation panel, a change-over switch, an oscilloscope positive and negative electrode butt joint socket, a millivoltmeter positive and negative electrode butt joint socket and two groups of sensor positive and negative electrode butt joint sockets, the box body comprises a box cover and a box main body, and an operation panel is supported on the box main body; the operation panel is provided with a change-over switch and each butt joint socket, and the back surface of the operation panel is provided with a connecting line of the butt joint sockets and the change-over switch; a positive butt joint socket and a negative butt joint socket in the oscilloscope positive and negative butt joint socket and the millivoltmeter positive and negative butt joint socket are respectively in short circuit, and are connected to corresponding contacts of the change-over switch together with the two groups of sensor positive and negative butt joint sockets; and the oscilloscope and the millivoltmeter are electrically connected with the two groups of sensor positive and negative electrode butt joint sockets in sequence through electric connection conversion of the change-over switch. The test box of the rotating speed coil sensor solves the problems of unstable measurement results, connection errors and low working efficiency.

A power supply apparatus (100) comprises an inverter (110), voltage and current measuring devices (120a, 120b), a temperature sensor (130), and an operation circuit (140). The inverter (110) comprises change-over switches (SW1-SW6). The voltage and current measuring devices (120a, 120b) are configured to measure the voltage (V1) and the current (I1) on the change-over switches (SW1-SW6). The temperature sensor (130) is configured to measure an initial temperature (T[0]) in an initial state. The operation circuit (140) is coupled to the voltage and current measuring devices (120a, 120b) and the temperature sensor (130). The operation circuit (140) is configured to: execute a power model (142), and calculate a first transient power of the change-over switches (SW1-SW6) on the basis of the initial temperature (T[0]), the voltage (V1), and the current (I1); and execute a thermal model (144), and calculate a first transient ideal temperature of the change-over switches (SW1-SW6) on basis of the first transient power. The power supply apparatus (100) calculates, in real time, the transient temperature of channel interfaces of the change-over switches (SW1-SW6) by measuring the voltage (V1) and the current (I1) on the change-over switches (SW1-SW6) of the inverter (110). The present invention also relates to a temperature measurement method (500) for a power supply apparatus, and an electrical system (ES1).

A motor drive device comprises: a drive unit implemented as at least one power module and including an upper switch, a lower switch, and a changeover switch configured to switch a motor drive mode; and a controller configured to determine a power loss of each of the upper switch, the lower switch, and the changeover switch to obtain a total power loss of the at least one power module, and to determine a temperature of the at least one power module based on the total power loss.

The present invention relates to the field of electrical device measurement technology, and in particular to a relay tester. Its technical solution includes: a protective box, a power supply box, and a locking block. The power supply box is slidably mounted inside the protective box via a slider. A relay tester body is fixedly mounted on the top of the power supply box. A relay body is fixedly mounted on the top of the relay tester body. The relay body and the relay tester body are electrically connected via a wire. A cover is movably mounted on the top of the protective box. The present invention utilizes the power supply box, the relay tester body, and the coordination between the relay body and the SA transfer switch to inspect and repair the automatic system through the relay body. Inspection and repair time can be greatly reduced, fault points can be quickly identified, and repair efficiency is improved. This effectively avoids replacing a large number of relays and causing spare parts losses.

A dual power switching system selects a first power source or a second power source to supply power to a load coupled to an inductive device. The dual power switching system includes a first thyristor, a second thyristor, a third thyristor, a fourth thyristor, and a controller. The controller calculates a total magnetic flux according to a current magnetic flux of the inductive device and an expected magnetic flux of the second power source. When the power-supplying source is switched, the controller turns off the first thyristor and the second thyristor, and determines whether a commutable time is reached according to a power parameter of the first static transfer switch and the second static transfer switch. When the commutable time is reached, the controller correspondingly turns on at least one of the third thyristor and the fourth thyristor according to the total magnetic flux being less than a threshold.

This application provides a changeover switch and a coffee machine. The changeover switch includes: a mounting bracket assembly fixed to the body of the coffee machine; a rotating assembly rotatably mounted on the mounting bracket assembly, having an initial position, a first working position, and a second working position; a control assembly connected to the rotating assembly, used to drive the rotating assembly to rotate, thereby switching the rotating assembly from the initial position to the first working position or the second working position, and from the first working position back to the initial position; a reset assembly mounted on the mounting bracket assembly, used to automatically switch the rotating assembly from the second working position to the initial position; and a positioning assembly mounted on the mounting bracket assembly, used to position the rotating assembly from the first working position, so that the rotating assembly remains in the first working position. The changeover switch of this application can automatically reset to the initial position when in the second working position without user operation, improving the user experience.

The embodiment of the utility model provides an energy storage indicating piece and a dual-power-supply change-over switch. The energy storage indicating piece is suitable for being rotatably arranged on a support of the dual-power-supply change-over switch and can be driven by a main spring assembly of the dual-power-supply change-over switch, and the energy storage indicating piece comprises a rotating part which is rotatably arranged on the support; the matching part is coupled to the rotating part and can be matched with a matching shaft of the main spring assembly so as to be driven by the matching shaft; and the indicating part is arranged on the rotating part in a manner of deviating from the matching part and comprises an energy release indicating mark and paired energy storage indicating marks, and the energy release indicating mark is positioned between the paired energy storage indicating marks.

The utility model discloses a factory power supply control system based on an uninterruptible power supply (UPS), which adopts two sets of UPS equipment to supply power to a field DSC system load in a centralized manner, replaces a traditional dispersed UPS independent power supply mode, and saves the investment of the UPS equipment of each site on site. And the concentration of the UPS equipment facilitates the management, maintenance and monitoring of the equipment, and fault hidden dangers can be found and eliminated in time through background monitoring. Meanwhile, storage battery maintenance and UPS equipment maintenance problems are considered in the design, a parallel operation mode is adopted, when one set of UPS equipment is out of fault, the other set of UPS equipment is seamlessly connected with a conversion power supply for power supply through STS static change-over switches of all sites on site, load disturbance-free and uninterrupted power supply of the DCS on site is achieved, the maintenance efficiency of the equipment is effectively improved, and the service life of the UPS equipment is prolonged. And stable operation of an enterprise production control system is ensured, production is not interrupted, and production cost is reduced.

This enables the detection of abnormal opening of the changeover switch. [Solution] The electric vehicle comprises a power storage device, a motor for driving with a three-phase open winding, a first inverter connected to a power line to which the power storage device is connected and connected to one end of the three-phase open winding and having a first upper arm and a first lower arm, a second inverter connected to the power line on the opposite side of the power storage device from the first inverter and connected to the other end of the three-phase open winding and having a second upper arm and a second lower arm, a changeover switch provided between the first and second inverters in the power line, and a control device that controls the first and second inverters and the changeover switch. The control device determines an open-circuit abnormality of the changeover switch when the changeover switch is in the ON state and the first and second inverters are being switched on, and it confirms that the absolute value of the zero-sequence current, which is the sum of the phase currents of each phase, is greater than or equal to a threshold.

The utility model discloses an intermediate relay checking device for checking a hydropower station. The intermediate relay checking device comprises a box body and a checking structure arranged in the box body, the verification structure comprises a change-over switch located on the upper left portion, a first-stage installation guide rail located on the lower left portion, a plurality of connecting pieces located on the upper right portion and a second-stage installation guide rail located on the lower right portion. A first-level terminal strip is arranged between the first-level installation guide rail and the second-level installation guide rail, and a second-level terminal strip is arranged on the right side of the second-level installation guide rail. According to the utility model, the checking structure is arranged in the box body and is composed of the change-over switch, the first-stage (second-stage) mounting guide rail, the connecting sheet and the first-stage (second-stage) terminal strip, so that checking work of the intermediate relay is realized; according to the invention, the verification time can be effectively shortened, and the verification operation is safer; the utility model has the advantages of convenient inspection and relatively safer performance.