CN113161173A - Dual-power transfer switch adopting logic interlocking principle - Google Patents
Dual-power transfer switch adopting logic interlocking principle Download PDFInfo
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- CN113161173A CN113161173A CN202110249415.2A CN202110249415A CN113161173A CN 113161173 A CN113161173 A CN 113161173A CN 202110249415 A CN202110249415 A CN 202110249415A CN 113161173 A CN113161173 A CN 113161173A
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- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 8
- 230000007547 defect Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
The invention discloses a dual-power automatic transfer switch, which comprises a contact assembly, a switching assembly, a common power supply microswitch, a standby power supply microswitch, a logic interlocking circuit and a controller, wherein the common power supply microswitch is connected with the standby power supply microswitch; the switching assembly is used for controlling the on and off of the common power supply microswitch or the standby power supply microswitch in a transmission mode when a power supply is switched; the logic interlocking circuit comprises a common power supply switching-on control circuit and a standby power supply switching-on control circuit; the switching-on control circuit of the common power supply and the switching-on control circuit of the standby power supply are respectively electrically connected with the controller and the switching assembly and are used for controlling the switching assembly to be switched to another normal power supply when one power supply fails; and connecting the standby power supply microswitch in series in the common power supply switch-on control circuit, and connecting the common power supply microswitch in series in the standby power supply switch-on control circuit. According to the invention, the two microswitches are arranged at the adjacent positions of the switching assembly, and the logic interlocking circuit is combined to protect the switching assembly from normally operating.
Description
Technical Field
The invention relates to the field of automatic transfer switch power, in particular to a dual-power transfer switch adopting a logic interlocking principle.
Background
The dual-power-supply change-over switch electric appliance is a common low-voltage electric appliance, is commonly used in important power distribution occasions (such as hospital power supply systems), is used for switching two paths of power supplies, and can be quickly switched to a standby power supply when the common power supply fails in the power supply process, so that the normal power supply of a load end is ensured.
In the process of switching the common and standby power supplies by the dual-power transfer switching device, the motor switched to the common power supply or the motor switched to the standby power supply is not allowed to be switched on simultaneously, so that the problems of failure and the like of the motor are prevented; the common dual-power transfer switch adopts a mechanical lever, namely, when one switch is closed, the other switch is mechanically clamped and cannot be closed, and the like, so that the two motors cannot be simultaneously switched on, but the mode is complex, can be realized by matching a plurality of parts, and has higher cost.
Disclosure of Invention
The invention aims to solve the technical problem of providing a simple and relatively low-cost dual-power transfer switch adopting a logic interlocking principle aiming at the defects of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a dual-power automatic transfer switch comprises a contact assembly for connecting a common power supply and a standby power supply and a switching assembly for switching the common power supply or the standby power supply, and is characterized by further comprising a common power supply microswitch, a standby power supply microswitch, a logic interlocking circuit and a controller for detecting faults of the common power supply or the standby power supply and transmitting signals;
the logic interlocking circuit comprises a common power supply switching-on control circuit and a standby power supply switching-on control circuit; one end of the common power supply switching-on control circuit is electrically connected with the controller, and the other end of the common power supply switching-on control circuit is electrically connected with the switching assembly and is used for controlling the switching assembly to be switched to a common power supply when the standby power supply fails; one end of the standby power supply switching-on control circuit is electrically connected with the controller, and the other end of the standby power supply switching-on control circuit is electrically connected with the switching assembly and is used for controlling the switching assembly to be switched to a standby power supply when a common power supply fails;
the common power supply microswitch and the standby power supply microswitch are arranged at adjacent positions of the switching component, and the switching component controls the common power supply microswitch or the standby power supply microswitch to be switched on in a transmission manner when switching the power supply; when the switching component is switched and connected to a common power supply, the common power supply microswitch is closed, and the standby power supply microswitch is disconnected; or when the common power supply microswitch is switched to be connected to the standby power supply, the standby power supply microswitch is switched on, and the common power supply microswitch is switched off;
the standby power supply microswitch is connected in series in the common power supply switch-on control circuit, and the common power supply microswitch is connected in series in the standby power supply switch-on control circuit, so that only one of the common power supply switch-on control circuit or the standby power supply switch-on control circuit is communicated and the other is disconnected in the working process of the dual-power-supply change-over switch, and the normal operation of the switching assembly is ensured.
Preferably, the common power supply switching-on control circuit comprises a power supply unit, a common relay, a common switching-on control unit and a common motor unit; the common relay comprises a coil G2 and a normally-open movable contact K2; a triode Q1 is arranged in the common closing control unit; the power supply unit is electrically connected with one end of the coil G2, and the common closing control unit is electrically connected with the other end of the coil G2; the movable contact K2 is electrically connected with the common motor unit; the standby power supply microswitch is connected between the coil G2 and the common closing control unit in series;
the standby power supply switching-on control circuit comprises a power supply unit, a standby relay, a standby switching-on control unit and a standby motor unit; the standby relay comprises a coil G1 and a normally-open movable contact K1; a triode Q2 is arranged in the standby switch-on control unit; the power supply unit is electrically connected with one end of the coil G1, and the standby closing control unit is electrically connected with the other end of the coil G1; the movable contact K1 is electrically connected with the standby motor unit; the common power supply microswitch is connected in series between the coil G1 and the standby closing control unit;
preferably, in the normally-used closing control unit, the controller transmits a normally-used power closing signal to the base of the triode Q1 through a resistor R67; the emitter of the triode Q1 is grounded, and the two ends of the base and the emitter are respectively connected with the two ends of the resistor R69 and the capacitor C31; the collector of the triode Q1 is connected with the first end of the standby power supply microswitch;
the second end of the standby power supply microswitch is connected with the second end of the coil G2, and the first end of the coil G2 is connected with the power supply unit; the coil G2 is also connected in parallel with a diode D22, the anode of the diode D22 is connected with the second end of the coil G2, and the cathode of the diode D22 is connected with the first end of the coil G2;
in the standby switch-on control unit, the controller transmits a standby power supply switch-on signal to the base electrode of the triode Q2 through a resistor R83; the emitter of the triode Q2 is grounded, and the two ends of the base and the emitter are respectively connected with the two ends of the resistor R73 and the capacitor C33; the collector of the triode Q2 is connected with the first end of the common power supply microswitch;
the second end of the common power supply microswitch is connected with the second end of the inductor G1, and the first end of the common power supply microswitch is connected with the power supply unit; the coil G1 is also connected in parallel with a diode D21, the anode of the diode D21 is connected to the second end of the coil G1, and the cathode of the diode D21 is connected to the first end of the coil G1.
Preferably, the switching assembly comprises a common motor and a standby motor; in the common motor unit, the movable contact K2 is connected with the common motor; in the standby motor unit, the movable contact K1 is connected to the standby motor.
Preferably, in the common motor unit, one end of the movable contact K2 is connected with an input end of a common motor power supply, and the other end of the movable contact K2 is connected with a first end of a bridge rectifier BR 2; the second end of the bridge rectifier BR2 is connected with the output end of the power supply of the common motor, the third end of the bridge rectifier BR2 is connected with the input end of the common motor and the first end of a piezoresistor RV2, and the fourth end of the bridge rectifier BR2 is connected with the output end of the common motor and the second end of the piezoresistor RV 2; the input end of the common motor is also connected with the cathode of a diode D19, and the anode of the diode D19 is connected with the output end of the common motor;
in the standby motor unit, one end of the movable contact K1 is connected with the input end of a standby motor power supply, and the other end of the movable contact K1 is connected with the first end of a bridge rectifier B32; the second end of the bridge rectifier BR3 is connected with the output end of the standby motor power supply, the third end of the bridge rectifier BR3 is connected with the input end of the standby motor and the first end of a piezoresistor RV3, and the fourth end of the bridge rectifier BR3 is connected with the output end of the standby motor and the second end of the piezoresistor RV 3; the input end of the standby motor is also connected with the cathode of a diode D20, and the anode of the diode D20 is connected with the output end of the standby motor.
Preferably, the power supply switching-on control circuit is characterized in that the power supply switching-on control circuit further comprises a standby power supply switching-on in-place feedback unit; when the standby power supply microswitch is closed, a signal that the standby power supply is switched on in place and normally works is fed back to the controller;
the standby power supply switching-on control circuit also comprises a common power supply switching-on in-place feedback unit; when the common power supply microswitch is closed, a signal that the common power supply is closed in place and normally works is fed back to the controller.
Preferably, in the common power supply switch-on in-place feedback unit, a first end of a resistor R78 is connected to the controller to output a switch-on in-place signal, and is connected to a first end of the common power supply microswitch through a resistor R68, a second end of the resistor R78 is grounded, and a capacitor B32 is arranged at two ends of the resistor R78; the resistor R68 is grounded through a capacitor B29;
in the standby power supply switching-on in-place feedback unit, a first end of a resistor R72 outputs a switching-on in-place signal and is connected to a first end of a standby power supply microswitch through a resistor R66, a second end of a resistor R72 is grounded, and two ends of the resistor R72 are provided with a capacitor B30; the resistor R66 is grounded through a capacitor B28.
Preferably, the controller is also electrically connected with a switch-back common power supply control circuit; the standby power supply is automatically switched to the common power supply after the common power supply is restored from a fault state to a normal state;
in the switch-back common power supply control circuit, the controller outputs a signal for recovering normal common power supply to the base electrode of a triode Q3 through a resistor R85, the emitter electrode of the triode Q3 is grounded, and two ends of the base electrode and the emitter electrode are respectively connected with two ends of a resistor R84 and two ends of a capacitor C35; the collector of the triode Q3 is connected with a switch-back circuit relay; the switch-back circuit relay comprises a coil G3 and a normally closed movable contact K3; the first end of the coil G3 is connected with the power supply unit, and the second end of the coil G3 is connected with the collector of the triode Q3; the coil G3 is also connected in parallel with a diode D23, the anode of the diode D23 is connected with the second end of the coil G3, and the cathode of the diode D23 is connected with the first end of the coil G3; the moving contact K3 is connected with a working circuit of a standby power supply; when the common power supply is recovered to be normal, the movable contact K3 is disconnected, the working circuit of the standby power supply is disconnected, and the standby power supply is switched to the common power supply by matching with the common power supply closing circuit.
Preferably, the controller is also electrically connected with the first end of the motor power supply control circuit; the second end of the motor power supply control circuit is connected with the input end of the motor power supply; the third end of the motor is connected with the power supply output end of the motor; the motor power supply control circuit is used for switching the motor power supply of a common motor or a standby motor;
in the motor power supply control circuit, the controller outputs a signal for starting a common motor power supply or a standby motor power supply to the base electrode of the triode Q4 through the resistor R86, the emitting electrode of the triode Q4 is grounded, and the two ends of the base electrode and the emitting electrode are respectively connected with the two ends of the resistor R87 and the capacitor C34; the collector of the triode Q4 is connected with a conversion type relay; the conversion type relay comprises a coil G4 and a double-pole double-throw switch K4; the first end of the coil G4 is connected with the power supply unit, and the second end of the coil G4 is connected with the collector of the triode Q4; the coil G4 is also connected in parallel with a diode D24, the anode of the diode D24 is connected with the second end of the coil G4, and the cathode of the diode D24 is connected with the first end of the coil G4; the double-pole double-throw switch K4 is provided with two contacts on one side, which are respectively connected with the input end of the motor power supply and the output end of the motor power supply, and four contacts on the other side, which are respectively connected with the input end of the common motor power supply, the output end of the common motor power supply, the input end of the standby motor power supply and the output end of the standby motor power supply; when the common motor or the standby motor needs to work, power is supplied.
Preferably, a common power supply in-place feedback micro switch and a standby power supply in-place feedback micro switch are further arranged at the adjacent positions of the switching assembly; the switching assembly controls the on and off of the common power supply in-place feedback micro switch or the standby power supply in-place feedback micro switch in a transmission mode when the power supply is switched; when the switching component is switched and connected to a common power supply, the common power supply in-place feedback microswitch is closed, and the standby power supply in-place feedback microswitch is disconnected; or when the standby power supply is switched and connected, the standby power supply in-place feedback microswitch is closed, and the common power supply in-place feedback microswitch is disconnected;
the common power supply in-place feedback micro switch and the standby power supply in-place feedback micro switch are electrically connected with a port for transmitting signals to a preset terminal; the port is electrically connected with the controller; when the common power supply in-place feedback microswitch is closed, transmitting a signal that the common power supply is closed in place to the port; and when the standby power supply in-place feedback microswitch is closed, transmitting a signal that the standby power supply is closed in place to the port.
The invention has the beneficial effects that: two micro switches are arranged in the double-power transfer switch through the adjacent positions of the switching components, and the switching components are protected to normally operate by combining a logic interlocking circuit, so that the defects of complex structure and high cost caused by a mechanical interlocking mode are overcome;
in addition, the invention is additionally provided with two microswitches for realizing the feedback of the power state signal to a preset terminal so as to realize the purpose of remote monitoring.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of the external structure of a dual power transfer switch according to the present invention;
FIG. 2 is a schematic view of the internal structure of the dual power transfer switch of FIG. 1 with a portion of the housing omitted;
FIG. 3 is a schematic view of the dual power transfer switch of FIG. 2 with portions of the contact assembly omitted;
FIG. 4 is a schematic diagram of the internal structure of the dual power transfer switch of FIG. 3;
FIG. 5 is a schematic diagram of a logic interlock circuit in the dual power transfer switch of the present invention;
FIG. 6 is a schematic diagram of a switch back normal power control circuit in the dual power transfer switch of the present invention;
FIG. 7 is a schematic diagram of a motor power circuit in the dual power transfer switch of the present invention;
FIG. 8 is a schematic diagram of a controller in the dual power transfer switch of the present invention;
fig. 9 is a schematic diagram of a control panel connection circuit in the dual power transfer switch of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
It should be noted that the flow charts shown in the drawings are only exemplary and do not necessarily include all the contents and operations/steps, nor do they necessarily have to be executed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. I.e. these functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor means and/or microcontroller means.
As shown in fig. 1-5, the dual power transfer switch of the present invention at least comprises a contact assembly 4, a switching assembly, a common power microswitch 31, a standby power microswitch 32, a logic interlock circuit, and a controller 24 for detecting a fault of the common power or the standby power and transmitting a signal; the contact assembly 4 is used for connecting a common power supply and a standby power supply; the switching component is used for switching a common power supply or a standby power supply;
specifically, the logic interlock circuit includes a common power supply closing control circuit 22 and a standby power supply closing control circuit 23; the normal power closing control circuit 22, the standby power closing control circuit 23 and the controller 24 are disposed on the PCB circuit board 2.
As shown in fig. 2, in the present embodiment, the contact assembly 4 is arranged with signal lines connected to the PCB circuit board 2 for powering the PCB circuit board; the controller 24 detects whether the common power supply or the standby power supply fails and transmits a signal to control the dual power supply changeover switch to switch the power supply by detecting the voltage condition of the power supply input end.
As shown in fig. 5, one end of the common power supply closing control circuit 22 is electrically connected to the controller 24, and the other end thereof is electrically connected to the switching component for controlling the switching component to switch to the common power supply when the standby power supply fails; one end of the standby power supply switching-on control circuit 23 is electrically connected with the controller 24, and the other end of the standby power supply switching-on control circuit is electrically connected with the switching component and is used for controlling the switching component to be switched to the standby power supply when the common power supply fails; specifically, the controller 24 is electrically connected with the logic interlock circuit; the logic interlocking circuit is electrically connected with the switching component; the controller is used for detecting whether the common power supply or the standby power supply fails or not, and transmitting a signal to the logic interlocking circuit; the logic interlocking circuit receives a signal from the controller and then controls the switching component to switch from the common power supply to the standby power supply or from the standby power supply to the common power supply.
As shown in fig. 4, the common power source microswitch 31 and the standby power source microswitch 32 are arranged adjacent to the switching assembly, and the switching assembly controls the closing of the common power source microswitch 31 or the standby power source microswitch 32 in a transmission manner when the power source is switched. Specifically, when the switching component shifts to switch the power supply, the switching component can drive and control the closing of one of the common power supply microswitch 31 and the standby power supply microswitch 32; preferably, the common power supply microswitch 31 and the standby power supply microswitch 32 are arranged at the two sides of the peripheral surface of the switching assembly in a central symmetry manner; when the switching component is switched to be connected to the common power supply, the common power supply microswitch 31 is closed, and the standby power supply microswitch 32 is opened; alternatively, the normal power microswitch 31 is opened by closing the standby power microswitch 32 when the connection to the standby power is switched.
As shown in fig. 5, the standby power microswitch 32 is connected in series in the common power switch-on control circuit 22, and the common power microswitch 31 is connected in series in the standby power switch-on control circuit 23, so that only one of the common power switch-on control circuit 22 or the standby power switch-on control circuit 23 is connected and the other is disconnected during the operation of the dual power transfer switch, thereby ensuring the normal operation of the switching assembly.
The common power supply closing control circuit 22 comprises a power supply unit, a common relay, a common closing control unit and a common motor unit; the common relay comprises a coil G2 and a normally-open movable contact K2; a triode Q1 is arranged in the common closing control unit; the power supply unit is electrically connected with one end of the coil G2, and the common closing control unit is electrically connected with the other end of the coil G2; the moving contact K2 is electrically connected with a common motor unit; the standby power microswitch 32 is connected in series between the coil G2 and the common closing control unit;
the standby power supply switching-on control circuit 23 comprises a power supply unit, a standby relay, a standby switching-on control unit and a standby motor unit; the standby relay comprises a coil G1 and a normally-open movable contact K1; a triode Q2 is arranged in the standby switch-on control unit; the standby closing control unit is electrically connected with the other end of the coil G1; the movable contact K1 is electrically connected with the standby motor unit; the common power microswitch 31 is connected in series between the coil G1 and the standby closing control unit.
Specifically, when the standby power supply microswitch 32 is closed, the standby power supply is in a normal working state, the triode Q1 in the common closing control unit is not conducted, and the common relay does not work; if the standby power supply fails, the controller 24 enables the triode Q1 to be conducted, the current passing through the coil G2 becomes large enough to drive the movable contact K2 to be closed, the common motor unit is connected, and the operation of the motor unit is switched to the common power supply; when the standby power microswitch 32 is disconnected, the common power closing control circuit 22 is disconnected; or, when the common power supply microswitch 31 is closed, the common power supply is in a normal working state, the triode Q2 in the common closing control unit is not conducted, and the standby relay does not work; if the normal power supply fails, the controller 24 enables the triode Q2 to be conducted, the current passing through the coil G1 becomes large enough to drive the movable contact K1 to be closed, the normal motor unit is switched on, and the operation of the normal motor unit is switched to the standby power supply; when the common power microswitch 31 is switched off, the standby power closing control circuit 23 is switched off.
Further, in the normal closing control unit, the controller 24 transmits a normal power closing signal to the base of the transistor Q1 through the resistor R67; the emitter of the triode Q1 is grounded, and the two ends of the base and the emitter are respectively connected with the two ends of the resistor R69 and the capacitor C31; the collector of the triode Q1 is connected with the first end of the standby power supply microswitch 32; the second end of the standby power supply microswitch 32 is connected with the second end of the coil G2, and the first end of the coil G2 is connected with the power supply unit; the coil G2 is also connected in parallel with a diode D22, the anode of the diode D22 is connected with the second end of the coil G2, and the cathode of the diode D22 is connected with the first end of the coil G2;
in the standby closing control unit, the controller 24 transmits a standby power closing signal to the base of the triode Q2 through a resistor R83; the emitter of the triode Q2 is grounded, and the two ends of the base and the emitter are respectively connected with the two ends of the resistor R73 and the capacitor C33; the collector of the triode Q2 is connected with the first end of the common power supply microswitch 31; the second end of the common power supply microswitch 31 is connected with the second end of the inductor G1, and the first end of the common power supply microswitch is connected with the power supply unit; the coil G1 is also connected in parallel with a diode D21, the diode D21 having its anode connected to the second terminal of the coil G1 and its cathode connected to the first terminal of the coil G1.
As shown in fig. 4 and 5, the switching assembly comprises a common motor 11 and a standby motor 12; specifically, in the common motor unit, two ends of the common motor 11 are respectively connected with an input end and an output end of a common motor power supply to supply power to the common motor 11, and the movable contact K2 is arranged at the input end of the common motor power supply to control the conduction or the disconnection of the common motor unit; in the standby motor unit, the two ends of the standby motor 12 are respectively connected with the input end and the output end of the standby motor power supply to supply power to the standby motor 12, and the movable contact K1 is arranged at the standby motor power supply input end to control the on-off of the standby motor unit.
Furthermore, in the common motor unit, one end of a movable contact K2 is connected with the input end of a common motor power supply, and the other end of the movable contact K2 is connected with the first end of a bridge rectifier BR 2; the second end of the bridge rectifier BR2 is connected with the output end of the common motor power supply, the third end of the bridge rectifier BR2 is connected with the input end of the common motor 11 and the first end of the piezoresistor RV2, and the fourth end of the bridge rectifier BR2 is connected with the output end of the common power supply motor 11 and the second end of the piezoresistor RV 2; the input end of the common motor 11 is also connected with the cathode of a diode D19, and the anode of a diode D19 is connected with the output end of the common motor 11;
in the standby motor unit, one end of a movable contact K1 is connected with the input end of a standby motor power supply, and the other end of the movable contact K1 is connected with the first end of a bridge rectifier B32; the second end of the bridge rectifier BR3 is connected with the output end of the standby motor power supply, the third end of the bridge rectifier BR3 is connected with the input end of the standby motor 12 and the first end of the piezoresistor RV3, and the fourth end of the bridge rectifier BR3 is connected with the output end of the standby motor 12 and the second end of the piezoresistor RV 3; the input end of the standby motor 12 is also connected with the cathode of the diode D20, and the anode of the diode D20 is connected with the output end of the standby motor 12.
As shown in fig. 4, in the present embodiment, the switching assembly includes a general motor 11, a standby motor 12, an operation rotating shaft 15, and a connecting shaft 18; the connecting shaft 18 swings to trigger the contact assembly 4 to be switched to a common power supply or a standby power supply; the operation rotating shaft 15 is connected with a connecting shaft 18 to drive the control contact assembly 4; when the common power supply or the standby power supply is switched, the operation rotating shaft 15 is rotated, and the contact assembly 4 is controlled to be switched to the common power supply or the standby power supply through the transmission of the connecting shaft.
Specifically, the common motor 11 includes a common power supply closing coil, and the standby motor 12 includes a standby power supply closing coil; a first tractor 13 is arranged in the common power supply closing coil, a second tractor 14 is arranged in the standby power supply closing coil, and the tractors can move back and forth under the action of the coils when the standby power supply closing coil is electrified; the operating rotating shaft 15 is fixedly sleeved with a strip-shaped baffle 16; the two ends of the baffle 16 are movably connected with the first retractor 13 and the second retractor 14 respectively; the end of the baffle 16 close to the connecting shaft 18 is meshed with a gear 17 fixed on the connecting shaft; when the operation rotating shaft 15 rotates up and down, the operation rotating shaft 15 drives the control blocking piece 16 to swing, the gear rotates the connecting shaft, and the control contact assembly 4 is switched to a common power supply or a standby power supply.
When the standby power microswitch 32 is closed, if the standby power fails, the common power closing circuit 22 controls the common motor 11 to work, so that a common power closing coil is electrified, the first tractor 13 pulls the shifting piece 16 to swing under the electromagnetic action, and the operation rotating shaft 15 is switched to a common power closing state; or, when the common power microswitch 31 is closed, if the common power fails, the standby power closing circuit 23 controls the standby motor 12 to work, so that the standby power closing coil is energized, the second retractor 14 pulls the moving piece 16 to swing under the electromagnetic action, and the operation rotating shaft 15 is switched to the standby power closing state.
As shown in fig. 5, the common power supply closing control circuit 22 further includes a standby power supply closing in-place feedback unit; when the standby power microswitch 32 is closed, a signal that the standby power is closed in place and normally works is fed back to the controller 24; the standby power supply switching-on control circuit 23 further comprises a common power supply switching-on in-place feedback unit; when the micro switch 31 of the common power supply is closed, a signal that the common power supply is closed in place and normally works is fed back to the controller 24.
Specifically, in the common power supply switch-on in-place feedback unit, a first end of a resistor R78 is connected with the controller 24 to output a switch-on in-place signal, and is connected to a first end of a common power supply microswitch 31 through a resistor R68, a second end of the resistor R78 is grounded, and two ends of the resistor R78 are provided with a capacitor B32; the resistor R68 is grounded through a capacitor B29; in the standby power supply switching-on in-place feedback unit, the controller 24 at the first end of the resistor R72 outputs a switching-on in-place signal and is connected to the first end of the standby power supply microswitch 32 through the resistor R66, the second end of the resistor R72 is grounded, and the two ends of the resistor R72 are provided with the capacitors B30; resistor R66 is connected to ground through capacitor B28.
The working principle of the in-place switching feedback unit of the common power supply is as follows: when the standby power supply works, the standby power supply microswitch is closed, because the triode Q1 is not conducted, the high level sent out from the power supply unit passes through the standby power supply microswitch and the resistor R66 to reach the output end of the controller, at the moment, the output end of the controller is high level, the standby power supply is fed back to be switched on in place, and the standby power supply normally works; when the standby power supply fails, the power supply unit sends a low level, the output end of the controller receives the low level, the input end of the controller sends a command to enable the triode Q1 to be conducted, the high level sent from the power supply unit directly passes through the triode Q1 and then reaches the ground without passing through the resistor R66, at the moment, the current passing through the coil G2 is increased, the switch K2 is closed, the motor unit of the common power supply is switched on, and the common motor works and is switched to the common power supply;
similarly, the working principle of the standby power supply closing in-place feedback unit is as follows: when the common power supply works, the common power supply microswitch is closed, because the triode Q2 is not conducted, the high level sent out from the power supply unit passes through the common power supply microswitch and the resistor R67 to reach the output end of the controller, at the moment, the output end of the controller is high level, the feedback common power supply is switched on in place, and the common power supply normally works; when the common power supply fails, the power supply unit sends a low level, the output end of the controller receives the low level, the input end of the controller sends a command to enable the triode Q2 to be conducted, the high level sent from the power supply unit directly passes through the triode Q2 and then reaches the ground without passing through the resistor R67, at the moment, the current passing through the coil G1 is increased, the switch K1 is closed, the standby power supply motor unit is switched on, and the standby motor works and is switched to the standby power supply.
As shown in fig. 6, the controller 24 is also electrically connected to a switch back normal power control circuit 25; when the normal power supply is restored from the fault state to the normal state, the controller 24 functions to switch back the normal power supply control circuit 25, so as to switch the standby power supply to the normal power supply;
specifically, in the switch-back normal power control circuit 25, the controller 24 outputs a signal for recovering the normal power to the base of the transistor Q3 through the resistor R85, the emitter of the transistor Q3 is grounded, and two ends of the base and the emitter are respectively connected to two ends of the resistor R84 and two ends of the capacitor C35; the collector of the triode Q3 is connected with the switch-back circuit relay; the switch-back circuit relay comprises a coil G3 and a normally closed movable contact K3; the first end of the coil G3 is connected with the power supply unit, and the second end of the coil G3 is connected with the collector of the triode Q3; the coil G3 is also connected in parallel with a diode D23, the anode of the diode D23 is connected with the second end of the coil G3, and the cathode of the diode D23 is connected with the first end of the coil G3; the movable contact K3 is connected with the working circuit of the standby power supply;
when the normal power supply is restored from the fault state to the normal state, the controller 24 outputs a signal to enable the triode Q3 to be conducted, the current passing through the coil G3 is increased, the movable contact K3 is disconnected, and the standby power supply is disconnected from the working state; and then the controller 24 transmits a signal to the common power supply switching-on control circuit 22, so that the process of switching from the standby power supply to the common power supply is realized after the common power supply is restored from the fault state to the normal state.
As shown in fig. 7, the controller is also electrically connected to the motor power control circuit 26 for switching the motor power of the common motor or the standby motor;
specifically, in the motor power control circuit 26, the controller 24 outputs a signal for starting a common motor power supply or a standby motor power supply to the base of the triode Q4 through the resistor R86, the emitter of the triode Q4 is grounded, and two ends of the base and the emitter are respectively connected with two ends of the resistor R87 and two ends of the capacitor C34; the collector of the triode Q4 is connected with a conversion type relay; the conversion type relay comprises a coil G4 and a double-pole double-throw switch K4; the first end of the coil G4 is connected with the power supply unit, and the second end of the coil G4 is connected with the collector of the triode Q4; the coil G4 is also connected in parallel with a diode D24, the anode of the diode D24 is connected with the second end of the coil G4, and the cathode of the diode D24 is connected with the first end of the coil G4; one side of the double-pole double-throw switch K4 is provided with two contacts which are respectively connected with the input end and the output end of the motor power supply, and the other side is provided with four contacts which are respectively connected with the input end of the common motor power supply, the output end of the common motor power supply, the input end of the standby motor power supply and the output end of the standby motor power supply; for supplying power when the service motor 11 or the backup motor 12 needs to be operated.
More specifically, the motor power control circuit 26 operates on the principle that when the controller 24 receives a fault of a common power supply, the transistor Q4 is turned on, the current passing through the coil G4 is increased, and the double-pole double-throw switch K4 is closed to the input end and the output end of the common motor power supply to provide a power supply for the common motor; or, when the controller 24 receives the standby power failure, the triode Q4 is turned on, the current passing through the coil G4 is increased, and the double-pole double-throw switch K4 is closed to the input end and the output end of the standby motor power supply to provide the power supply for the standby motor work.
Specifically, AL shown in fig. 7 represents a power input end of the common motor, which is communicated to an L end of the common power closing control circuit 22 shown in fig. 3; the AN represents a power output end of a common motor and is communicated to the N end of the common power closing control circuit 22 shown in FIG. 3; the BL represents a power supply input end of the standby motor and is communicated to an L end in the standby power supply closing control circuit 23 shown in fig. 3; BN represents the power output of the conventional motor and is connected to the N terminal of the standby power closing control circuit 23 shown in fig. 3.
As shown in fig. 4, a common power supply in-place feedback microswitch 33 and a standby power supply in-place feedback microswitch 34 are further arranged at adjacent positions of the switching assembly; the switching component controls the on and off of the common power supply in-place feedback microswitch 33 or the standby power supply in-place feedback microswitch 34 in a transmission mode when the power supply is switched; preferably, the common power supply in-place feedback microswitch 33 and the common power supply microswitch 22 are stacked up and down, and the standby power supply in-place feedback microswitch 34 and the standby power supply microswitch 23 are stacked up and down and arranged on two sides of the peripheral surface of the switching assembly;
when the switching component is switched and connected to a common power supply, the common power supply in-place feedback microswitch 33 is closed, and the standby power supply in-place feedback microswitch 34 is opened; or, when the standby power supply is switched and connected, the standby power supply in-place feedback microswitch 34 is closed, and the common power supply in-place feedback microswitch 33 is opened;
the common power supply in-place feedback microswitch 33 and the standby power supply in-place feedback microswitch 34 are electrically connected with the port 21 for transmitting signals to a preset terminal; port 21 is electrically connected to controller 24; when the common power supply in-place feedback microswitch 33 is closed, a signal that the common power supply is closed in place is transmitted to the port 21; when the standby power supply in-place feedback microswitch 33 is closed, a signal that the standby power supply is closed in place is transmitted to the port 21.
Preferably, the predetermined terminal may be a monitor (not shown) with a feedback signal lamp, the monitor being electrically connected to the port 21; when the common power supply in-place feedback microswitch 33 is closed, a signal of the common power supply in-place closing is fed back to the monitor through the port 21; or when the standby power supply in-place feedback microswitch 33 is closed, a signal of the standby power supply in-place closing is fed back to the monitor through the port 21, so that remote monitoring is realized.
As an optional technical solution of the present invention, the dual power transfer switch further includes a display panel 35; the display panel 35 is electrically connected to the controller 24 through the control panel 27.
The display panel 35 includes a normal power indicator, a standby power indicator, a normal power input indicator, a standby power input indicator, and an automatic indicator and a manual indicator; when the common power supply or the standby power supply is in a normal state, the common power supply indicator lamp or the standby power supply indicator lamp is turned on, otherwise, when the common power supply or the standby power supply fails, the corresponding indicator lamp is turned off; when the switching assembly is switched to a common power supply for use, the common power supply microswitch is normally closed, the common power supply input indicator lamp is on, the standby power supply microswitch is switched off, and the standby power supply input indicator lamp is turned off; on the contrary, when the switching component is switched to the standby power supply for use, the standby power supply microswitch is normally closed, the standby power supply input indicator lamp is on, the common power supply microswitch is disconnected at the moment, and the common power supply input indicator lamp is turned off;
the display panel 35 is further provided with a time delay switch and a dial switch, wherein the dial switch is used for controlling whether the dual power supply change-over switch manually or automatically switches the common power supply and the standby power supply, and is used for switching the states of self-switching, self-recovery and non-self-recovery; when the dial switch is adjusted to the manual state, the manual indicator light is on, and when the dial switch is adjusted to the automatic state, the automatic indicator light is on; the time delay switch is used for adjusting the switching action time of switching from the common power supply to the standby power supply or switching from the standby power supply to the common power supply.
When the dual-power supply is in an automatic state, a self-switching state and a self-resetting state, the common power supply and the standby power supply are in a normal state, the dual-power supply change-over switch is automatically switched to the common power supply after being started for the first time, the common power supply indicator lamp is turned off when the common power supply fails, the dual-power supply change-over switch is automatically switched to the standby power supply if the standby power supply is normal, the standby power supply input indicator lamp is turned on, and the common power supply input indicator lamp is turned off; when the common power supply is recovered to be normal, the dual-power transfer switch can automatically switch back to the common power supply, the common power supply input lamp is on, and the standby power supply input lamp is off; if a delay switch is arranged, the common power supply can be switched back by automatic delay at the set time;
when the dual-power supply is in an automatic state and a self-switching and non-self-resetting state, firstly, the common power supply and the standby power supply are in a normal state, the dual-power supply change-over switch is automatically switched to the common power supply after being started for the first time, when the common power supply fails, the indicator lamp of the common power supply is turned off, at the moment, if the standby power supply is normal, the dual-power supply change-over switch can be automatically switched to the standby power supply, and if the time delay switch is arranged, the dual-power supply change-over switch can be switched after a specified time; the standby power supply input indicator lamp is on, and the common power supply input indicator lamp is off; when the common power supply is recovered to be normal, the dual-power transfer switch keeps using the standby power supply until manual switching or standby power supply failure.
In this embodiment, the controller 24 may be a single chip microcomputer, specifically, a single chip microcomputer of the model STM32F030C8T 6; the thirty-ninth pin PB3 of the single chip microcomputer is connected with a resistor R67 in a common closing control unit, and the twenty-eighth pin PB15/RTC _ REFIN is connected with the first end of the resistor R72; a thirty-eighth pin PA15 of the singlechip is connected with a resistor R83 in the standby switch-on control unit, and a twenty-seventh pin PB14 is connected with a first end of the resistor R78; a twenty-first pin PB10 of the singlechip is connected with a resistor R85 in the switch-back common power control circuit 25, and a twenty-second pin PB11 of the singlechip is connected with a resistor R86 in the motor power control circuit 26; the thirteenth pin PA3/ADC _ IN3 of the single-chip microcomputer is connected with the first pin 1 of the control panel 27, the fourteenth pin PA4/ADC _ IN4 of the single-chip microcomputer is connected with the third pin 3 of the control panel 27, the eighteenth pin PB0/ADC _ IN8 of the single-chip microcomputer is connected with the fifth pin 5 of the control panel 27, the nineteenth pin PB1/ADC _ IN9 of the single-chip microcomputer is connected with the seventh pin 7 of the control panel 27, the twenty-fifth pin PB12 of the single-chip microcomputer is connected with the ninth pin 9 of the control panel 27, the twenty-sixth pin PB13 of the single-chip microcomputer is connected with the second pin 2 of the control panel 27, the thirty-fifth pin PF6 of the single-chip microcomputer is connected with the fourth pin 4 of the control panel 27, the forty-sixth pin PB9 of the single-chip microcomputer is connected with the sixth pin 6 of the control panel 27, the forty-first pin 5 of the single-chip microcomputer is connected with the eighth pin 8 of the control panel 27, and the forty-second pin PB6 of the control panel 27 is connected with the tenth pin 10 of the control panel 27. In addition, in order to enable the voltage detected by the sampling circuit to be more accurate and accurately judge whether the detected voltage is in an undervoltage state or an overvoltage state, so as to judge whether the common power supply and the standby power supply are in failure or not, a thirty-sixth pin PF7 of the single chip microcomputer is connected with the first voltage calibration circuit and is used for simultaneously calibrating the voltages of the common power supply and the standby power supply; the forty th pin PB4 of the singlechip is connected with the second voltage calibration circuit and used for carrying out voltage calibration of the standby power supply again to avoid data errors.
In summary, according to the dual-power transfer switch, the two microswitches are arranged at the adjacent positions of the switching assembly, and the logic interlocking circuit is combined to protect the normal operation of the switching assembly, so that the defects of complex structure and high cost caused by a mechanical interlocking mode are overcome; in addition, the invention is also provided with two microswitches for feeding back the power state signal to a preset terminal so as to realize the purpose of remote monitoring.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (10)
1. A dual-power automatic transfer switch comprises a contact assembly (4) for connecting a common power supply and a standby power supply and a switching assembly for switching the common power supply or the standby power supply, and is characterized by further comprising a common power supply microswitch (31), a standby power supply microswitch (32), a logic interlocking circuit and a controller (24) for detecting faults of the common power supply or the standby power supply and transmitting signals;
the logic interlocking circuit comprises a common power supply switching-on control circuit (22) and a standby power supply switching-on control circuit (23); one end of the common power supply switching-on control circuit (22) is electrically connected with the controller (24), and the other end of the common power supply switching-on control circuit is electrically connected with the switching assembly and is used for controlling the switching assembly to be switched to a common power supply when the standby power supply fails; one end of the standby power supply switching-on control circuit (23) is electrically connected with the controller (24), and the other end of the standby power supply switching-on control circuit is electrically connected with the switching assembly and is used for controlling the switching assembly to be switched to a standby power supply when a common power supply fails;
the common power supply microswitch (31) and the standby power supply microswitch (32) are arranged at the adjacent positions of the switching assembly, and the switching assembly controls the common power supply microswitch (31) or the standby power supply microswitch (32) to be closed in a transmission manner when switching the power supply; when the switching component is switched to be connected to a common power supply, the common power supply microswitch (31) is closed, and the standby power supply microswitch (32) is opened; or, when the standby power supply is switched and connected, the standby power supply microswitch (32) is closed, and the common power supply microswitch (31) is opened;
the standby power supply microswitch (32) is connected in series in the common power supply switch-on control circuit (22), and the common power supply microswitch (31) is connected in series in the standby power supply switch-on control circuit (23), so that only one of the common power supply switch-on control circuit (22) or the standby power supply switch-on control circuit (23) is connected in the working process of the dual-power-supply change-over switch, and the other one is disconnected, and the normal operation of the switching assembly is ensured.
2. The dual power supply automatic transfer switch of claim 1, wherein the common power supply closing control circuit (22) comprises a power supply unit, a common relay, a common closing control unit, and a common motor unit; the common relay comprises a coil G2 and a normally-open movable contact K2; a triode Q1 is arranged in the common closing control unit; the power supply unit is electrically connected with one end of the coil G2, and the common closing control unit is electrically connected with the other end of the coil G2; the movable contact K2 is electrically connected with the common motor unit; the standby power supply microswitch (32) is connected in series between the coil G2 and the common closing control unit;
the standby power supply switching-on control circuit (23) comprises a power supply unit, a standby relay, a standby switching-on control unit and a standby motor unit; the standby relay comprises a coil G1 and a normally-open movable contact K1; a triode Q2 is arranged in the standby switch-on control unit; the power supply unit is electrically connected with one end of the coil G1, and the standby closing control unit is electrically connected with the other end of the coil G1; the movable contact K1 is electrically connected with the standby motor unit; the common power supply microswitch (31) is connected in series between the coil G1 and the standby closing control unit.
3. The dual power automatic transfer switch of claim 2, wherein in the common closing control unit, the controller (24) transmits a common power closing signal to the base of the transistor Q1 through a resistor R67; the emitter of the triode Q1 is grounded, and the two ends of the base and the emitter are respectively connected with the two ends of the resistor R69 and the capacitor C31; the collector of the triode Q1 is connected with the first end of the standby power supply microswitch (32);
the second end of the standby power supply microswitch (32) is connected with the second end of the coil G2, and the first end of the coil G2 is connected with the power supply unit; the coil G2 is also connected in parallel with a diode D22, the anode of the diode D22 is connected with the second end of the coil G2, and the cathode of the diode D22 is connected with the first end of the coil G2;
in the standby switch-on control unit, the controller (24) transmits a standby power supply switch-on signal to the base electrode of the triode Q2 through a resistor R83; the emitter of the triode Q2 is grounded, and the two ends of the base and the emitter are respectively connected with the two ends of the resistor R73 and the capacitor C33; the collector of the triode Q2 is connected with the first end of the common power supply microswitch (31);
the second end of the common power supply microswitch (31) is connected with the second end of the inductor G1, and the first end of the common power supply microswitch is connected with the power supply unit; the coil G1 is also connected in parallel with a diode D21, the anode of the diode D21 is connected to the second end of the coil G1, and the cathode of the diode D21 is connected to the first end of the coil G1.
4. The dual power automatic transfer switch of claim 2, wherein the switching assembly includes a service motor (11) and a backup motor (12); in the common motor unit, the movable contact K2 is connected with the common motor (11); in the standby motor unit, the movable contact K1 is connected with the standby motor (12).
5. The dual power automatic transfer switch of claim 4, wherein in the common motor unit, one end of the movable contact K2 is connected with the input end of the common motor power supply, and the other end of the movable contact K2 is connected with the first end of a bridge rectifier BR 2; the second end of the bridge rectifier BR2 is connected with the output end of the common motor power supply, the third end of the bridge rectifier BR2 is connected with the input end of the common motor (11) and the first end of a piezoresistor RV2, and the fourth end of the bridge rectifier BR2 is connected with the output end of the common motor (11) and the second end of the piezoresistor RV 2; the input end of the common motor (11) is also connected with the cathode of a diode D19, and the anode of the diode D19 is connected with the output end of the common motor (11);
in the standby motor unit, one end of the movable contact K1 is connected with the input end of a standby motor power supply, and the other end of the movable contact K1 is connected with the first end of a bridge rectifier B32; the second end of the bridge rectifier BR3 is connected with the output end of the standby motor power supply, the third end of the bridge rectifier BR3 is connected with the input end of the standby motor (12) and the first end of a piezoresistor RV3, and the fourth end of the bridge rectifier BR3 is connected with the output end of the standby motor (12) and the second end of the piezoresistor RV 3; the input end of the standby motor (12) is also connected with the cathode of a diode D20, and the anode of the diode D20 is connected with the output end of the standby motor (12).
6. The dual power supply automatic transfer switch of claim 2, wherein the common power supply closing control circuit (22) further comprises a standby power supply closing in-place feedback unit; when the standby power supply microswitch (32) is closed, a signal that the standby power supply is switched on in place and normally works is fed back to the controller (24);
the standby power supply switching-on control circuit (23) also comprises a common power supply switching-on in-place feedback unit; when the common power supply microswitch (31) is closed, a signal that the common power supply is closed in place and normally works is fed back to the controller (24).
7. The dual-power automatic transfer switch of claim 6, wherein in the common power supply switch-on-position feedback unit, a first end of a resistor R78 is connected to the controller (24) to output a switch-on-position signal, and is connected to a first end of the common power supply microswitch (31) through a resistor R68, a second end of the resistor R78 is grounded, and a capacitor B32 is arranged at two ends of the resistor R78; the resistor R68 is grounded through a capacitor B29;
in the standby power supply switching-on in-place feedback unit, a first end of a resistor R72 is connected to a first end of a standby power supply microswitch (32) through a resistor R66, a second end of the resistor R72 is grounded, and a capacitor B30 is arranged at two ends of the resistor R72; the resistor R66 is grounded through a capacitor B28.
8. The dual power automatic transfer switch of claim 2, wherein the controller (24) is further electrically connected to a switch back utility power control circuit (25); the standby power supply is automatically switched to the common power supply after the common power supply is restored from a fault state to a normal state;
in the switch-back common power supply control circuit (25), the controller (24) outputs a signal for recovering normal common power supply to the base electrode of a triode Q3 through a resistor R85, the emitter electrode of the triode Q3 is grounded, and two ends of the base electrode and the emitter electrode are respectively connected with two ends of a resistor R84 and two ends of a capacitor C35; the collector of the triode Q3 is connected with a switch-back circuit relay; the switch-back circuit relay comprises a coil G3 and a normally closed movable contact K3; the first end of the coil G3 is connected with the power supply unit, and the second end of the coil G3 is connected with the collector of the triode Q3; the coil G3 is also connected in parallel with a diode D23, the anode of the diode D23 is connected with the second end of the coil G3, and the cathode of the diode D23 is connected with the first end of the coil G3; the moving contact K3 is connected with a working circuit of a standby power supply; when the normal power supply is recovered, the movable contact K3 is disconnected, the working circuit of the standby power supply is disconnected, and the standby power supply is switched to the normal power supply by matching with the normal power supply closing circuit (22).
9. The dual power automatic transfer switch of claim 5, wherein the controller (24) is further electrically connected to a first terminal of a motor power control circuit (26); the second end of the motor power supply control circuit (26) is connected with the input end of the motor power supply; the third end of the motor is connected with the power supply output end of the motor; the motor power supply control circuit (26) is used for switching the motor power supply of a common motor or a standby motor;
in the motor power supply control circuit (26), the controller (24) outputs a signal for starting a common motor power supply or a standby motor power supply to the base electrode of a triode Q4 through a resistor R86, the emitter electrode of the triode Q4 is grounded, and the two ends of the base electrode and the emitter electrode are respectively connected with the two ends of a resistor R87 and a capacitor C34; the collector of the triode Q4 is connected with a conversion type relay; the conversion type relay comprises a coil G4 and a double-pole double-throw switch K4; the first end of the coil G4 is connected with the power supply unit, and the second end of the coil G4 is connected with the collector of the triode Q4; the coil G4 is also connected in parallel with a diode D24, the anode of the diode D24 is connected with the second end of the coil G4, and the cathode of the diode D24 is connected with the first end of the coil G4; the double-pole double-throw switch K4 is provided with two contacts on one side, which are respectively connected with the input end of the motor power supply and the output end of the motor power supply, and four contacts on the other side, which are respectively connected with the input end of the common motor power supply, the output end of the common motor power supply, the input end of the standby motor power supply and the output end of the standby motor power supply; when the common motor (11) or the standby motor (12) needs to work, power is supplied.
10. The dual-power automatic transfer switch of claim 1, wherein a common power-supply-in-place feedback microswitch (33) and a standby power-supply-in-place feedback microswitch (34) are further arranged at adjacent positions of the switching components; the switching assembly controls the on and off of the common power supply in-place feedback micro switch (33) or the standby power supply in-place feedback micro switch (34) in a transmission mode when the power supply is switched; when the switching component is switched and connected to a common power supply, the common power supply in-place feedback microswitch (33) is closed, and the standby power supply in-place feedback microswitch (34) is opened; or, when the standby power supply is switched and connected, the standby power supply in-place feedback microswitch (34) is closed, and the common power supply in-place feedback microswitch (33) is opened;
the common power supply in-place feedback micro switch (33) and the standby power supply in-place feedback micro switch (34) are electrically connected with a port (21) for transmitting signals to a preset terminal; the port (21) is electrically connected with the controller (24); when the common power supply in-place feedback microswitch (33) is closed, transmitting a signal that the common power supply is closed in place to the port (21); when the standby power supply in-place feedback microswitch (33) is closed, a signal that the standby power supply is closed in place is transmitted to the port (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110249415.2A CN113161173B (en) | 2021-03-08 | 2021-03-08 | Dual-power transfer switch adopting logic interlocking principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110249415.2A CN113161173B (en) | 2021-03-08 | 2021-03-08 | Dual-power transfer switch adopting logic interlocking principle |
Publications (2)
| Publication Number | Publication Date |
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| CN113161173A true CN113161173A (en) | 2021-07-23 |
| CN113161173B CN113161173B (en) | 2024-01-16 |
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| CN202110249415.2A Active CN113161173B (en) | 2021-03-08 | 2021-03-08 | Dual-power transfer switch adopting logic interlocking principle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023040024A1 (en) * | 2021-09-17 | 2023-03-23 | 亮山企业有限公司 | Lighting device |
| TWI836969B (en) | 2023-04-25 | 2024-03-21 | 陳錫瑜 | Improvement device for automatic switching switch |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1441553A (en) * | 2002-02-27 | 2003-09-10 | 达倡有限公司 | Power switch |
| CN201294169Y (en) * | 2008-11-03 | 2009-08-19 | 乐清市富隆电器有限公司 | Duplicate supply automatic transfer switch |
| CN202067694U (en) * | 2011-05-16 | 2011-12-07 | 常熟开关制造有限公司(原常熟开关厂） | Control circuit of change-over switch |
| CN206401249U (en) * | 2017-01-18 | 2017-08-11 | 环宇集团浙江高科股份有限公司 | Double power supply automatic transfer switch |
| CN206790205U (en) * | 2017-02-28 | 2017-12-22 | 天津市斯沃电器有限公司 | The hardware circuit of automatic change-over controller |
| EP3726698A1 (en) * | 2019-04-19 | 2020-10-21 | Sunpower Corporation | Energy control system |
-
2021
- 2021-03-08 CN CN202110249415.2A patent/CN113161173B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1441553A (en) * | 2002-02-27 | 2003-09-10 | 达倡有限公司 | Power switch |
| CN201294169Y (en) * | 2008-11-03 | 2009-08-19 | 乐清市富隆电器有限公司 | Duplicate supply automatic transfer switch |
| CN202067694U (en) * | 2011-05-16 | 2011-12-07 | 常熟开关制造有限公司(原常熟开关厂） | Control circuit of change-over switch |
| CN206401249U (en) * | 2017-01-18 | 2017-08-11 | 环宇集团浙江高科股份有限公司 | Double power supply automatic transfer switch |
| CN206790205U (en) * | 2017-02-28 | 2017-12-22 | 天津市斯沃电器有限公司 | The hardware circuit of automatic change-over controller |
| EP3726698A1 (en) * | 2019-04-19 | 2020-10-21 | Sunpower Corporation | Energy control system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023040024A1 (en) * | 2021-09-17 | 2023-03-23 | 亮山企业有限公司 | Lighting device |
| US11924940B2 (en) | 2021-09-17 | 2024-03-05 | Star Mount Enterprise Limited | Lighting apparatus |
| TWI836969B (en) | 2023-04-25 | 2024-03-21 | 陳錫瑜 | Improvement device for automatic switching switch |
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| CN113161173B (en) | 2024-01-16 |
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