CN104716735A - Control circuit of simple double-power-supply changeover device - Google Patents
Control circuit of simple double-power-supply changeover device Download PDFInfo
- Publication number
- CN104716735A CN104716735A CN201510156939.1A CN201510156939A CN104716735A CN 104716735 A CN104716735 A CN 104716735A CN 201510156939 A CN201510156939 A CN 201510156939A CN 104716735 A CN104716735 A CN 104716735A
- Authority
- CN
- China
- Prior art keywords
- circuit
- power supply
- phase
- subsequent use
- voltage stabilizing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- 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 control circuit of a simple double-power-supply changeover device. The control circuit is characterized in that when a frequently-used power supply is normal, a power supplying circuit of a reserve power supply is deenergized and does not work; an N phase of the frequently-used power supply and an N phase of the reserve power supply cannot be communicated at any time, so that the misoperation of a frontend residual current circuit-breaker caused by a current current-direction imbalance phenomenon resulting from the connection of voltage of two channels is avoided. A three-phase voltage loss detection circuit of the frequently-used power supply adopts a capacitive step-down circuit to replace a transformer, wherein a phase A voltage loss detection circuit of the frequently-used power supply is doubled as a power supplying circuit of the frequently-used power supply, and a gate circuit and a timer 555 integrated circuit are adopted as a logic control circuit instead of a microcontroller. The control circuit mainly has the following advantages that the whole circuit is simple, scientific and ingenious in structure, high in reliability, good in EMC (Electro-Magnetic Compatibility) and low in power consumption; the economical efficiency is high, the cost performance is high, the manufacturing is easy, the maintenance is convenient, the maintenance cost is low, and the control circuit is energy-saving and environment-friendly, thereby having relatively great popularization value.
Description
Technical field
The present invention relates to dual-power transfer switch appliance field, particularly a kind of electronic control circuit of dual-power transfer switch electrical equipment.
Background technology
The important events of some low-voltage distributions, for reducing the economic loss caused because of power failure, adopt two road Power supplies: conventional, for subsequent use or for subsequent use each other, this two roads power supply can be all mains supply, and Ye Ke mono-tunnel is mains supply, and a road is that diesel engine generator is powered.When a road power supply in power supply process because of fault can not normal power supply time, its load is called dual-power transfer switch electrical equipment by the device switching to another road power supply, be called for short TSE, for being called double-power supply switching device, the device that its load is automatically handed over another road power supply is called automatic transfer switching electric appliance, is called for short ATSE.
At present, ATSE is generally made up of automatic change-over body and control circuit two parts, is mainly used in the important place not allowing to have a power failure.Automatic change-over body primarily of two circuit breakers as main switch, prevent two mechanical interlocking mechanism for circuit breakers and the machinery conversion mechanism that driven by two-way reducing motor from forming, control circuit is the intelligent control circuit composition of core primarily of microcontroller.When control circuit detects that the deviation exceeding permission appears in the conventional supply voltage of the current power supply of load, ATSE automatically switches to another stand-by power supply and powers, and guarantees that load supplying is unlikely to long-time interruption; When conventional power up is normal, ATSE can automatically switch back conventional Power supply, also can continue to continue power supply by current stand-by power supply, proper time more manually or remote control switch back conventional Power supply.
ATSE with intelligent control circuit is generally referred to as intelligent duplicate power supply conversion equipment, and its main switch is with rated operational current generally at more than 100A device for switching, and its price is also relatively high, is generally used in larger unit, as the occasion such as hospital, airport.But in some occasions among a small circle, the places such as market as little in some, little company, in its unit interval, power consumption is relatively little, as long as with the small-sized economical double-power supply switching device that cost performance is higher, as the miniature circuit breaker that main switch rated operational current is within the scope of 16A ~ 100A, also little to the monitoring requirement of supply voltage, the no-voltage faults such as the phase shortage of conventional power supply need be monitored for general.
Intelligent duplicate power supply conversion equipment control circuit is complicated, and manufacturing cost is high.As being at least provided with as whole circuit provides working power two-way power supply in control circuit, after power supply and stand-by power supply step-down being commonly used respectively by two power transformers, in parallel again by rectification, need two-way power supply to power so simultaneously, cause the waste of power supply.The circuit of monitoring duplex feeding supply voltage, generally to be dropped to power-frequency voltage in proportion as decompression device by miniature transformer and compares lower security voltage and be input to control circuit voltage detecting end and carry out voltage monitoring.General two-way detecting voltage by three phase needs 6 miniature transformers, and miniature transformer is inductive load, because it exists volume greatly, takies the space that controller is larger, is unfavorable for that controller is miniaturized; But also there is the humorous wave height of miniature transformer, the defect such as radiation is high, cost is high, power consumption greatly, easily burns out.For another example microcontroller, in the electric room environment that condition of work is severe, electromagnetic interference is serious, and easily damage, easily malfunction, reliability be relatively poor, and need programming, development difficulty is large, difficult in maintenance.
Summary of the invention
For the control circuit solving existing simple type double-power supply switching device exists above-mentioned defect, the invention provides the control circuit of the simple type double-power supply switching device that a kind of structure simple science power consumption is little, cost is low, reliability is high.
For achieving the above object, the scheme that the present invention takes is: a kind of control circuit of simple type double-power supply switching device, it comprises is located at conversion motor in the machinery conversion mechanism of double-power supply switching device and travel switch, it is characterized in that: it also comprises conventional power supply three-phase pressure loss testing circuit, signal transformation circuit, conversion motor control circuit, conventional forwards delay circuit for subsequent use, conventional power-supplying circuit for aforementioned four circuit supplies to, for subsequent usely forward conventional delay circuit to, be the stand-by power supply power supply circuits forwarding conventional delay circuit to and power for subsequent use; Wherein, conventional forward delay circuit for subsequent use to, for subsequent usely forward the gate-controlled switch that conventional delay circuit is at least provided with one group of band normally open contact and normally closed interlock to, conversion motor control circuit is at least provided with the gate-controlled switch of two groups of band normally open contacts and normally closed interlock; Conventional power-supplying circuit is connected with the A phase in conventional power supply, the output of conventional power supply three-phase pressure loss testing circuit is connected with the input of signal transformation circuit, and the conventional input forwarding delay circuit for subsequent use to is connected with the output of signal transformation circuit with the control input end of conversion motor control circuit; First common port of the gate-controlled switch of conversion motor control circuit is connected with conventional power supply A phase by the normally closed interlock of one stroke switch, second common port of the gate-controlled switch of conversion motor control circuit is connected with the A phase of stand-by power supply by the normally closed interlock of one stroke switch, correspondingly, the first normally open contact that first common port is corresponding rotates forward control end with conversion motor and is connected, second normally closed interlock corresponding to the second common port and the conversion motor control end that reverses is connected, and the input of stand-by power supply power supply circuits is connected with the second normally closed interlock; The N phase of the conventional normally open contact and conventional power supply that forward delay circuit for subsequent use to is connected, and the N phase of the normally open contact and stand-by power supply that forward delay circuit for subsequent use to for subsequent use is connected, and the common port of the conventional common port and conversion motor that forward delay circuit for subsequent use to is connected; The common port of the common port and conversion motor that forward conventional delay circuit to for subsequent use is connected, or the common port forwarding conventional delay circuit to for subsequent use is connected with the normally closed interlock forwarding conventional delay circuit to for subsequent use.Wherein, it should be noted that, be connected with the normally closed interlock forwarding conventional delay circuit to for subsequent use N phase of the N phase that can guarantee conventional power supply and stand-by power supply of the common port forwarding conventional delay circuit to for subsequent use can not be connected to the common port of conversion motor simultaneously, avoid two-way voltage gang up and current direction energy imbalance occurs, cause the residual current circuit breaker malfunction of front end.
Further illustrating as such scheme, during the decompression phenomenons such as conventional power supply generation phase shortage, conventional power supply three-phase pressure loss testing circuit sends abnormal signal, after signal transformation circuit Shape correction, be sent to conversion motor control circuit, conventional forward delay circuit for subsequent use to, conversion motor control circuit and the conventional gate-controlled switch action forwarding delay circuit for subsequent use to, whole normally open contacts of gate-controlled switch disconnect, and the electrical connection of conversion motor and conventional power supply is in off-state, stand-by power supply power supply circuits and conversion motor are all connected with the A circuitry phase of stand-by power supply, start to forward conventional delay circuit to power for for subsequent use, conventional delay circuit is powered after time delay, connect conventional delay circuit power in whole normally open contacts of gate-controlled switch, namely the N circuitry phase of conversion motor and stand-by power supply is connected, conversion motor is powered by the A phase of stand-by power supply, conversion motor action, the circuit breaker of conventional mains side is disconnected, by the breaker closing of standby electricity source, after the circuit breaker of standby electricity source is in closure state, the normally closed interlock of the travel switch be connected with the A phase of stand-by power supply disconnects, conversion motor dead electricity is slack, load is powered by stand-by power supply.When conventional power up is normal, conventional power supply three-phase pressure loss testing circuit sends normal signal, after signal transformation circuit Shape correction, be sent to conversion motor control circuit, commonly use and forward delay circuit for subsequent use to, conversion motor control circuit and the conventional gate-controlled switch sequencing action forwarding delay circuit for subsequent use to, A phase and the N phase of conversion motor and stand-by power supply disconnect, simultaneously, stand-by power supply power supply circuits also disconnect with the A phase of stand-by power supply, stop forwarding conventional delay circuit to power to for subsequent use, conversion motor control circuit and the conventional whole normally open contacts forwarding the gate-controlled switch of delay circuit for subsequent use to are connected, the electrical connection of conversion motor and conventional power supply is in on-state, conversion motor action, the circuit breaker of standby electricity source is disconnected, by the breaker closing of conventional mains side, after the circuit breaker of conventional mains side is in closure state, the normally closed interlock of the travel switch be connected with the A phase of conventional power supply disconnects, conversion motor dead electricity is slack, and load is by commonly using Power supply.Therefore when conventional power supply normal power supply, whole circuit only has conventional power-supplying circuit to provide working power, and stand-by power supply power supply circuits are in off-position, guarantee that two-way power supply does not interfere with each other, add the independence of conventional power supply and stand-by power supply, decrease the operating time of related electronic devices, not only save electric energy, improve the reliability of system, also improve the useful life of electronic device.
Aforementioned conventional power supply three-phase pressure loss testing circuit comprises its input and is connected respectively to the conventional power supply A phase no-voltage detection circuit of corresponding conventional power supply three-phase separately, conventional power supply B phase no-voltage detection circuit and conventional power supply C phase no-voltage detection circuit; Wherein, conventional power supply A phase no-voltage detection circuit doubles as conventional power-supplying circuit, and conventional power supply A phase no-voltage detection circuit comprises A phase capacity voltage dropping circuit, the A commutating phase voltage stabilizing circuit of connecting successively; Conventional power supply B phase no-voltage detection circuit comprises B phase capacity voltage dropping circuit, B commutating phase voltage stabilizing circuit and the B phase photoelectric isolating circuit of connecting successively; Conventional power supply C phase no-voltage detection circuit comprises C phase capacity voltage dropping circuit, C commutating phase voltage stabilizing circuit and the C phase photoelectric isolating circuit of connecting successively; Wherein, A commutating phase voltage stabilizing circuit, B phase photoelectric isolating circuit, C phase photoelectric isolating circuit and aforesaid signal transformation circuit tandem successively.
due to A commutating phase voltage stabilizing circuit, B phase photoelectric isolating circuit, C phase photoelectric isolating circuit, and aforesaid signal transformation circuit successively tandem be that, as long as there is conventional power supply to have a phase decompression, signal transformation circuit just can not get normal signal and sends abnormal signal.It is conventional that power supply A phase no-voltage detection circuit is ingenious doubles as conventional power-supplying circuit, when utilizing A phase decompression, B phase photoelectric isolating circuit, C phase photoelectric isolating circuit can not get working power and cannot send the phenomenon of signal, save an A phase photoelectric isolating circuit for conventional power supply A phase, for whole control circuit is reduced weight, save electronic device, reduce cost.Use capacity voltage dropping circuit as potential circuit, because electric capacity is idle device, during work, do not consume active power, also do not generate heat, relative transformer is safer, and volume is little, and pin is few, easily installs, also more save controller space, meanwhile, cost is also cheaper, is conducive to energy-conserving and environment-protective.
Preferably, aforementioned A phase capacity voltage dropping circuit, B phase capacity voltage dropping circuit and C phase capacity voltage dropping circuit include by can the non-polar condenser of resistance to power frequency high voltage and the discharge resistance in parallel with this non-polar condenser form; Capacity voltage dropping circuit module input is also connected to piezo-resistance.
More specifically, CBB electric capacity or the safety electric capacity of aforementioned non-polar condenser to be withstand voltage be 240V ~ 1000V.
The use of capacity voltage dropping circuit, because electric capacity is capacitive load, its EMC performance is good, in theory its not consumed power, and power consumption becomes very low, and harmonic wave is little.CBB electric capacity or safety electric capacity cheap, security performance is high.
Its principle of capacity voltage dropping circuit is actually and utilizes capacitive reactance current limliting, is described below its Current calculation formula.Such as, receiving the alternating voltage of 220V/50Hz as control voltage, when capacitance C is 1uF, if the employing available electric current of full-wave rectification (mean value) is: I (AV)=0.89 × V/Zc=0.89 × 220 × 2 × ∏ × f × C=0.89 × 220 × 2 × 3.14 × 50 × C=60000C=60000 × 0.000001=0.06A=60mA.The capacity of choose reasonable non-polar condenser, circuit can normally work.
Preferably, aforementioned A commutating phase voltage stabilizing circuit, B commutating phase voltage stabilizing circuit, C commutating phase voltage stabilizing circuit and stand-by power supply power supply circuits include integrated full-wave rectification bridge and are located at the filter capacitor of full-wave rectification bridge output, full-wave rectification bridge output is provided with the voltage stabilizing circuit that voltage regulation resistance and voltage stabilizing didoe are composed in series, wherein, voltage stabilizing didoe in A commutating phase voltage stabilizing circuit and stand-by power supply power supply circuits is voltage stabilizing value is 12V voltage stabilizing didoe, and the voltage stabilizing didoe in B commutating phase voltage stabilizing circuit and C commutating phase voltage stabilizing circuit is voltage stabilizing value is 5V voltage stabilizing didoe, be connected to after A commutating phase circuit output end of pressure-stabilizing that secondary pressure circuit, this secondary pressure circuit that voltage stabilizing value is 5V integrated regulator and filter capacitor composition is conventional power supply three-phase pressure loss testing circuit, signal transformation circuit, conversion motor control circuit, conventionally forward delay circuit for subsequent use to working power is provided, B phase photoelectric isolating circuit and C phase photoelectric isolating circuit are and are respectively made up of a photoelectrical coupler, two optocoupler integrated circuits of these two photoelectrical couplers to be the model being integrated with two photoelectrical couplers be PC521-2, its input is connected with the output of the voltage stabilizing didoe in B commutating phase voltage stabilizing circuit and C commutating phase voltage stabilizing circuit respectively, the c pole of first module photoelectrical coupler is connected by the output of pull-up resistor with 5V integrated regulator, the e pole of first module photoelectrical coupler is connected with the c pole of second unit photoelectrical coupler, the e pole of second unit photoelectrical coupler is connected with signal transformation circuit input.
Aforementioned signal shaping circuit is composed in series primarily of the NAND gate circuit of two-stage band Schmidt trigger, the input of each NAND gate circuit connects, and is parallel with pull down resistor and ground capacity between the input of first order NAND gate circuit and conventional power ground line.The NAND gate circuit of Schmidt trigger, because being provided with voltage fluctuation window, effectively can preventing the short-time fluctuations of conventional supply voltage from causing conversion motor frequently to switch, affect the power supply to load.
Gate-controlled switch in aforementioned conversion motor control circuit is the power supply selective relay being provided with two groups of normally closed normal open switch contacts, and the common port of the common port of its first group of switch contact and second group of switch contact corresponds respectively to the first common port and second common port of the gate-controlled switch of conversion motor control circuit; Correspondingly, the normally closed interlock of the normally open contact of its first group of switch contact and second group of switch contact corresponds respectively to the first normally open contact and the second normally closed interlock, power supply selective relay selects triode to drive by a NPN type power supply, and this power supply selects the b pole of triode to be connected to the second level NAND gate circuit output of signal transformation circuit by resistance; The input of stand-by power supply power supply circuits is connected with the normally closed interlock of second group of switch contact.
Aforementionedly conventional forward delay circuit for subsequent use to and comprise the conventional charge-discharge circuit be made up of potentiometer and capacitances in series, the logical circuit be made up of the NAND gate circuit of band Schmidt trigger of two series connection, and with the conventional N phase control relay of one group of normally open contact and normally closed interlock; Wherein, the input of each NAND gate circuit connects, potentiometer input in conventional charge-discharge circuit selects the b of triode to be extremely connected with power supply, this electric capacity is connected with conventional power ground line, and the potentiometer output in conventional charge-discharge circuit is connected with the input of the input of first order NAND gate circuit; Conventional N phase control relay is commonly used N phase control triode by a NPN type and is driven, and the b pole of this conventional N phase control triode is connected to the second level NAND gate circuit output of logical circuit by a resistance; The normally open contact of conventional N phase control relay corresponds to commonly use and forwards the aforesaid normally open contact of delay circuit for subsequent use to, and the common port of conventional N phase control relay corresponds to the conventional common port forwarding delay circuit for subsequent use to.
Aforementionedly for subsequent usely forward conventional delay circuit to and comprise the charge-discharge circuit for subsequent use be sequentially composed in series by fixed resistor, potentiometer and electric capacity, the logic drive circuit be made up of 555 timer integrated circuit, and often drive the standby N phase control relay with normally closed interlock with one group, wherein, be connected with the output of the potentiometer in charge-discharge circuit for subsequent use after the pin 2 of 555 timer integrated circuit connects with pin 6, fixed resistor input in charge-discharge circuit for subsequent use is connected with the cathode output end of the full-wave rectification bridge in stand-by power supply power supply circuits, the pin 1 of 555 timer integrated circuit is connected with the negative pole of the full-wave rectification bridge in stand-by power supply power supply circuits with the electric capacity one end in charge-discharge circuit for subsequent use, the pin 4 of 555 timer integrated circuit is connected with the cathode output end of the full-wave rectification bridge in stand-by power supply power supply circuits with pin 8, standby N phase control relay is driven by the pin 3 of 555 timer integrated circuit by one, and namely coil one end of standby N phase control relay is connected with the cathode output end of the full-wave rectification bridge in stand-by power supply power supply circuits, the other end is connected with the pin 3 of 555 timer integrated circuit, the normally open contact of standby N phase control relay corresponds to and for subsequent usely forwards the aforesaid normally open contact of conventional delay circuit to, and the common port of standby N phase control relay corresponds to the common port forwarding conventional delay circuit delay circuit to for subsequent use.
Aforementioned control circuit also comprises the condition indication circuit indicating the circuit breaker as main switch whether to be in "on" position, and condition indication circuit is connected with travel switch.
As from the foregoing, the present invention mainly contains following advantage: whole circuit structure is simple, science is ingenious, and reliability is high, EMC performance is good, power consumption is little; Not only good economy performance, cost performance are high, easy to manufacture, and safeguard and also facilitate, maintenance cost is low, energy-conserving and environment-protective, has larger promotional value.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present invention.
Fig. 2 is conventional power supply three-phase pressure loss testing circuit theory diagram.
Fig. 3 is the circuit theory diagrams of Fig. 2.
Fig. 4 is the circuit theory diagrams of primary control circuit part of the present invention.
Fig. 5 is the circuit theory diagrams of condition indication circuit.
The main BRIEF DESCRIPTION OF SYMBOLS: 11- converted motor trip switch 13- 12- commonly lost power three-phase voltage detection circuit 131-A phase loss voltage detection circuit 1311-A phase capacitor step-down circuit 1312-A phase rectifier regulator circuit 132- loss of normal power supply voltage detection circuit phase B 1321-B phase capacitor step-down circuit 1322-B phase rectifier voltage regulator circuit 1323-B phase optical isolation circuit 133- C with loss of normal power supply voltage detection circuit 1331-C phase capacitor step-down circuit 1332 -C-phase rectifier voltage regulator circuit 1333-C phase optical isolation circuit 14- 15- signal shaping circuit converts the motor control circuit used to spare the delay circuits 16- 17- 18- spare the common power supply circuit used to delay circuit 19 - standby power supply circuit 20- status indication circuits.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, the present invention and Advantageous Effects thereof are further elaborated.
See Fig. 1 ~ Fig. 5, the control circuit of simple type double-power supply switching device comprises is located at conversion motor 11 in the machinery conversion mechanism of double-power supply switching device and travel switch 12, conventional power supply three-phase pressure loss testing circuit 13, signal transformation circuit 14, conversion motor control circuit 15, conventionally forward delay circuit 16 for subsequent use to, be the conventional power-supplying circuit 17 of four circuit supplies, for subsequent usely forward conventional delay circuit 18 to, be the stand-by power supply power supply circuits 19 forwarding the power supply of conventional delay circuit 18 to for subsequent use; Wherein, conventional forward delay circuit 16 for subsequent use to, for subsequent usely forward the gate-controlled switch that conventional delay circuit 18 is at least provided with one group of band normally open contact and normally closed interlock to, conversion motor control circuit 15 is at least provided with the gate-controlled switch of two groups of band normally open contacts and normally closed interlock; Conventional power-supplying circuit 17 is connected with the A phase in conventional power supply, the output of conventional power supply three-phase pressure loss testing circuit 13 is connected with the input of signal transformation circuit 14, and the control input end of the conventional input and conversion motor control circuit 15 that forward delay circuit 16 for subsequent use to is connected with the output of signal transformation circuit 14; First common port of the gate-controlled switch of conversion motor control circuit 15 is connected with conventional power supply A phase by the normally closed interlock of one stroke switch 12, second common port of the gate-controlled switch of conversion motor control circuit 15 is connected with the A phase of stand-by power supply by the normally closed interlock of one stroke switch 12, correspondingly, the first normally open contact that first common port is corresponding rotates forward control end with conversion motor 11 and is connected, second normally closed interlock corresponding to the second common port and conversion motor 11 control end that reverses is connected, and the input of stand-by power supply power supply circuits 19 is connected with the second normally closed interlock; The N phase of the conventional normally open contact and conventional power supply that forward delay circuit 16 for subsequent use to is connected, and the N phase of the normally open contact and stand-by power supply that forward delay circuit for subsequent use to for subsequent use is connected, and the conventional common port forwarding delay circuit 16 for subsequent use to is connected with the common port of conversion motor 11; The common port forwarding conventional delay circuit 18 to for subsequent use is connected with the common port of conversion motor 11, or the common port forwarding conventional delay circuit 18 to for subsequent use is connected with the normally closed interlock forwarding conventional delay circuit 18 to for subsequent use.
See Fig. 2, Fig. 3, conventional power supply three-phase pressure loss testing circuit 13 comprises its input and is connected respectively to the conventional power supply A phase no-voltage detection circuit 131 of corresponding conventional power supply three-phase separately, conventional power supply B phase no-voltage detection circuit 132 and conventional power supply C phase no-voltage detection circuit 133; Wherein, conventional power supply A phase no-voltage detection circuit 131 doubles as conventional power-supplying circuit 17, and conventional power supply A phase no-voltage detection circuit 131 comprises A phase capacity voltage dropping circuit 1311, the A commutating phase voltage stabilizing circuit 1312 of connecting successively; Conventional power supply B phase no-voltage detection circuit 132 comprises B phase capacity voltage dropping circuit 1321, B commutating phase voltage stabilizing circuit 1322 and the B phase photoelectric isolating circuit 1323 of connecting successively; Conventional power supply C phase no-voltage detection circuit 133 comprises C phase capacity voltage dropping circuit 1331, C commutating phase voltage stabilizing circuit 1332 and the C phase photoelectric isolating circuit 1333 of connecting successively; Wherein, A commutating phase voltage stabilizing circuit 1312, B phase photoelectric isolating circuit 1323, C phase photoelectric isolating circuit 1333 and signal transformation circuit 14 tandem successively.
Include by can the non-polar condenser (C1, C2, C3) of resistance to power frequency high voltage and the discharge resistance (R6, R8, R10) in parallel with this non-polar condenser (C1, C2, C3) form see Fig. 3, A phase capacity voltage dropping circuit 1311, B phase capacity voltage dropping circuit 1321 and C phase capacity voltage dropping circuit 1331; Capacity voltage dropping circuit module input is also connected to piezo-resistance (Rt1, Rt2, Rt3).
Non-polar condenser (C1, C2, C3) for withstand voltage be CBB electric capacity or the safety electric capacity of 240V ~ 1000V.The capacity of non-polar condenser (C1, C2, C3) is preferably 0.1uF ~ 2.2uF.Matchingly, discharge resistance (R6, R8, R10) is 330k Ω ~ 1000 k Ω.
See Fig. 3, A commutating phase voltage stabilizing circuit 1312, B commutating phase voltage stabilizing circuit 1322, C commutating phase voltage stabilizing circuit 1332 and stand-by power supply power supply circuits 19 include integrated full-wave rectification bridge (D8, D9, D10, D11), and be located at full-wave rectification bridge (D8, D9, D10, D11) filter capacitor (C8 of output, C9, C10, C12), full-wave rectification bridge (D8, D9, D10, D11) output is provided with voltage regulation resistance (R5, R7, and voltage stabilizing didoe (VD1 R9), VD3, VD4, VD2) voltage stabilizing circuit be composed in series, wherein, voltage stabilizing didoe (VD1 in A commutating phase voltage stabilizing circuit 1312 and stand-by power supply power supply circuits 19, VD2) for voltage stabilizing value is 12V voltage stabilizing didoe, voltage stabilizing didoe VD3 in B commutating phase voltage stabilizing circuit and C commutating phase voltage stabilizing circuit 1332, VD4) for voltage stabilizing value is 5V voltage stabilizing didoe, be connected to after A commutating phase voltage stabilizing circuit 1312 output that voltage stabilizing value is that secondary pressure circuit, this secondary pressure circuit that 5V integrated regulator U1 and filter capacitor (C11, C4) form is conventional power supply three-phase pressure loss testing circuit 13, signal transformation circuit 14, conversion motor control circuit 15, conventionally forward delay circuit 16 for subsequent use to working power is provided, B phase photoelectric isolating circuit 1323 and C phase photoelectric isolating circuit 1333 are and are respectively made up of a photoelectrical coupler, two optocoupler integrated circuit U2 of these two photoelectrical couplers to be the model being integrated with two photoelectrical couplers be PC521-2, its input respectively with the voltage stabilizing didoe (VD3 in B commutating phase voltage stabilizing circuit and C commutating phase voltage stabilizing circuit 1332, VD4) output connects, the c pole of first module photoelectrical coupler is connected with the output of 5V integrated regulator U1 by pull-up resistor R12, the e pole of first module photoelectrical coupler is connected with the c pole of second unit photoelectrical coupler, the e pole of second unit photoelectrical coupler is connected with signal transformation circuit 14 input.
See Fig. 3, signal transformation circuit 14 is composed in series primarily of the NAND gate circuit (U31, U41) of two-stage band Schmidt trigger, the input of each NAND gate circuit connects, and is parallel with pull down resistor R11 and ground capacity C7 between the input of first order NAND gate circuit U31 and conventional power ground line.Gate-controlled switch in conversion motor control circuit 15 is the power supply selective relay KA1 being provided with two groups of normally closed normal open switch contacts, and the common port of the common port of its first group of switch contact and second group of switch contact corresponds respectively to the first common port and second common port of the gate-controlled switch of conversion motor control circuit 15; Correspondingly, the normally closed interlock of the normally open contact of its first group of switch contact and second group of switch contact corresponds respectively to the first normally open contact and the second normally closed interlock, power supply selective relay KA1 selects triode Q1 to drive by a NPN type power supply, and this power supply selects the b pole of triode Q1 to be connected to the second level NAND gate circuit U41 output of signal transformation circuit 14 by resistance R14; The input of stand-by power supply power supply circuits 19 is connected with the normally closed interlock of second group of switch contact.The preferred model of NAND gate circuit with Schmidt trigger is CD4093 integrated circuit, and this IC interior is integrated with the NAND gate circuit unit of 4 unit, can just meet the quantity of above-mentioned four NAND gate circuit.
See Fig. 4, conventional forward delay circuit 16 for subsequent use to and comprise the conventional charge-discharge circuit be composed in series by potentiometer PR1 and electric capacity C13, the logical circuit be made up of the NAND gate circuit (U51, U61) of band Schmidt trigger of two series connection, and with the conventional N phase control relay K A3 of one group of normally open contact and normally closed interlock; Wherein, the input of each NAND gate circuit connects, potentiometer PR1 input in conventional charge-discharge circuit selects the b of triode Q1 to be extremely connected with power supply, electric capacity C13 is connected with conventional power ground line, and the current potential PR1 device output in conventional charge-discharge circuit is connected with the input of the input of first order NAND gate circuit U51; Conventional N phase control relay K A3 commonly uses N phase control triode Q2 by a NPN type and drives, and the b pole of this conventional N phase control triode Q2 is connected to the second level NAND gate circuit U61 output of logical circuit by a resistance R15; The normally open contact of conventional N phase control relay K A3 corresponds to the conventional normally open contact forwarding delay circuit 16 for subsequent use to, and the common port of conventional N phase control relay K A3 corresponds to the conventional common port forwarding delay circuit 16 for subsequent use to.
See Fig. 4, for subsequent usely forward conventional delay circuit 18 to and comprise the charge-discharge circuit for subsequent use be sequentially composed in series by fixed resistor R16, potentiometer PR2 and electric capacity C14, the logic drive circuit be made up of 555 timer integrated circuit U7, and often open the standby N phase control relay K A2 with normally closed interlock with one group, wherein, be connected with the output of the potentiometer PR2 in charge-discharge circuit for subsequent use after the pin 2 of 555 timer integrated circuit U7 connects with pin 6, fixed resistor input in charge-discharge circuit for subsequent use is connected with the cathode output end of the full-wave rectification bridge D11 in stand-by power supply power supply circuits 19, the pin 1 of 555 timer integrated circuit U7 is connected with the negative pole of the full-wave rectification bridge D11 in stand-by power supply power supply circuits 19 with the electric capacity C14 one end in charge-discharge circuit for subsequent use, the pin 4 of 555 timer integrated circuit U7 is connected with the cathode output end of the full-wave rectification bridge D11 in stand-by power supply power supply circuits 19 with pin 8, standby N phase control relay K A2 is driven by the pin 3 of 555 timer integrated circuit U7 by one, and namely coil one end of standby N phase control relay K A2 is connected with the cathode output end of the full-wave rectification bridge D11 in stand-by power supply power supply circuits 19, the other end is connected with the pin 3 of 555 timer integrated circuit U7, the normally open contact of standby N phase control relay K A2 corresponds to the normally open contact forwarding conventional delay circuit 18 to for subsequent use, and the common port of standby N phase control relay K A2 corresponds to the common port forwarding conventional delay circuit 18 delay circuit to for subsequent use.
See Fig. 5, control circuit also comprises the condition indication circuit 12 indicating the circuit breaker as main switch whether to be in "on" position, and condition indication circuit 12 is connected with travel switch 12.
Book and specific embodiment do not form any restriction to the present invention according to the above description; the present invention is not limited to embodiment disclosed and described above; to amendments more of the present invention and distortion, also should fall in the protection range of claim of the present invention.
Claims (10)
1. the control circuit of a simple type double-power supply switching device, it comprises is located at conversion motor in the machinery conversion mechanism of double-power supply switching device and travel switch, it is characterized in that: it also comprises conventional power supply three-phase pressure loss testing circuit, signal transformation circuit, conversion motor control circuit, conventional forwards delay circuit for subsequent use, conventional power-supplying circuit for aforementioned four circuit supplies to, for subsequent usely forward conventional delay circuit to, be the stand-by power supply power supply circuits forwarding conventional delay circuit to and power for subsequent use; Wherein, conventional forward delay circuit for subsequent use to, for subsequent usely forward the gate-controlled switch that conventional delay circuit is at least provided with one group of band normally open contact and normally closed interlock to, conversion motor control circuit is at least provided with the gate-controlled switch of two groups of band normally open contacts and normally closed interlock; Conventional power-supplying circuit is connected with the A phase in conventional power supply, the output of conventional power supply three-phase pressure loss testing circuit is connected with the input of signal transformation circuit, and the conventional input forwarding delay circuit for subsequent use to is connected with the output of signal transformation circuit with the control input end of conversion motor control circuit; First common port of the gate-controlled switch of conversion motor control circuit is connected with conventional power supply A phase by the normally closed interlock of one stroke switch, second common port of the gate-controlled switch of conversion motor control circuit is connected with the A phase of stand-by power supply by the normally closed interlock of one stroke switch, correspondingly, the first normally open contact that first common port is corresponding rotates forward control end with conversion motor and is connected, second normally closed interlock corresponding to the second common port and the conversion motor control end that reverses is connected, and the input of stand-by power supply power supply circuits is connected with the second normally closed interlock; The N phase of the conventional normally open contact and conventional power supply that forward delay circuit for subsequent use to is connected, and the N phase of the normally open contact and stand-by power supply that forward delay circuit for subsequent use to for subsequent use is connected, and the common port of the conventional common port and conversion motor that forward delay circuit for subsequent use to is connected; The common port of the common port and conversion motor that forward conventional delay circuit to for subsequent use is connected, or the common port forwarding conventional delay circuit to for subsequent use is connected with the normally closed interlock forwarding conventional delay circuit to for subsequent use.
2. the control circuit of simple type double-power supply switching device as claimed in claim 1, is characterized in that: described conventional power supply three-phase pressure loss testing circuit comprises its input and is connected respectively to the conventional power supply A phase no-voltage detection circuit of corresponding conventional power supply three-phase separately, conventional power supply B phase no-voltage detection circuit and conventional power supply C phase no-voltage detection circuit; Wherein, conventional power supply A phase no-voltage detection circuit doubles as conventional power-supplying circuit, and conventional power supply A phase no-voltage detection circuit comprises A phase capacity voltage dropping circuit, the A commutating phase voltage stabilizing circuit of connecting successively; Conventional power supply B phase no-voltage detection circuit comprises B phase capacity voltage dropping circuit, B commutating phase voltage stabilizing circuit and the B phase photoelectric isolating circuit of connecting successively; Conventional power supply C phase no-voltage detection circuit comprises C phase capacity voltage dropping circuit, C commutating phase voltage stabilizing circuit and the C phase photoelectric isolating circuit of connecting successively; Wherein, A commutating phase voltage stabilizing circuit, B phase photoelectric isolating circuit, C phase photoelectric isolating circuit and aforesaid signal transformation circuit tandem successively.
3. the control circuit of simple type double-power supply switching device as claimed in claim 2, is characterized in that: described A phase capacity voltage dropping circuit, B phase capacity voltage dropping circuit and C phase capacity voltage dropping circuit include by can the non-polar condenser of resistance to power frequency high voltage and the discharge resistance in parallel with this non-polar condenser form; Capacity voltage dropping circuit module input is also connected to piezo-resistance.
4. the control circuit of simple type double-power supply switching device as claimed in claim 2, is characterized in that: CBB electric capacity or the safety electric capacity of described non-polar condenser to be withstand voltage be 240V ~ 1000V.
5. the control circuit of simple type double-power supply switching device as claimed in claim 4, it is characterized in that: described A commutating phase voltage stabilizing circuit, B commutating phase voltage stabilizing circuit, C commutating phase voltage stabilizing circuit and stand-by power supply power supply circuits include integrated full-wave rectification bridge, and be located at the filter capacitor of full-wave rectification bridge output, full-wave rectification bridge output is provided with the voltage stabilizing circuit that voltage regulation resistance and voltage stabilizing didoe are composed in series, wherein, voltage stabilizing didoe in A commutating phase voltage stabilizing circuit and stand-by power supply power supply circuits is voltage stabilizing value is 12V voltage stabilizing didoe, voltage stabilizing didoe in B commutating phase voltage stabilizing circuit and C commutating phase voltage stabilizing circuit is voltage stabilizing value is 5V voltage stabilizing didoe, be connected to after A commutating phase circuit output end of pressure-stabilizing that secondary pressure circuit, this secondary pressure circuit that voltage stabilizing value is 5V integrated regulator and filter capacitor composition is conventional power supply three-phase pressure loss testing circuit, signal transformation circuit, conversion motor control circuit, conventionally forward delay circuit for subsequent use to working power is provided, B phase photoelectric isolating circuit and C phase photoelectric isolating circuit are and are respectively made up of a photoelectrical coupler, two optocoupler integrated circuits of these two photoelectrical couplers to be the model being integrated with two photoelectrical couplers be PC521-2, its input is connected with the output of the voltage stabilizing didoe in B commutating phase voltage stabilizing circuit and C commutating phase voltage stabilizing circuit respectively, the c pole of first module photoelectrical coupler is connected by the output of pull-up resistor with 5V integrated regulator, the e pole of first module photoelectrical coupler is connected with the c pole of second unit photoelectrical coupler, the e pole of second unit photoelectrical coupler is connected with signal transformation circuit input.
6. the control circuit of simple type double-power supply switching device as claimed in claim 5, it is characterized in that: described signal transformation circuit is composed in series primarily of the NAND gate circuit of two-stage band Schmidt trigger, the input of each NAND gate circuit connects, and is parallel with pull down resistor and ground capacity between the input of first order NAND gate circuit and conventional power ground line.
7. the control circuit of simple type double-power supply switching device as claimed in claim 6, it is characterized in that: the gate-controlled switch in described conversion motor control circuit is the power supply selective relay being provided with two groups of normally closed normal open switch contacts, the common port of the common port of its first group of switch contact and second group of switch contact corresponds respectively to the first common port and second common port of the gate-controlled switch of conversion motor control circuit; Correspondingly, the normally closed interlock of the normally open contact of its first group of switch contact and second group of switch contact corresponds respectively to the first normally open contact and the second normally closed interlock, power supply selective relay selects triode to drive by a NPN type power supply, and this power supply selects the b pole of triode to be connected to the second level NAND gate circuit output of signal transformation circuit by resistance; The input of stand-by power supply power supply circuits is connected with the normally closed interlock of second group of switch contact.
8. the control circuit of simple type double-power supply switching device as claimed in claim 7, it is characterized in that: describedly conventional forward delay circuit for subsequent use to and comprise the conventional charge-discharge circuit be made up of potentiometer and capacitances in series, the logical circuit be made up of the NAND gate circuit of band Schmidt trigger of two series connection, and with the conventional N phase control relay of one group of normally open contact and normally closed interlock; Wherein, the input of each NAND gate circuit connects, potentiometer input in conventional charge-discharge circuit selects the b of triode to be extremely connected with power supply, this electric capacity is connected with conventional power ground line, and the potentiometer output in conventional charge-discharge circuit is connected with the input of the input of first order NAND gate circuit; Conventional N phase control relay is commonly used N phase control triode by a NPN type and is driven, and the b pole of this conventional N phase control triode is connected to the second level NAND gate circuit output of logical circuit by a resistance; The normally open contact of conventional N phase control relay corresponds to the conventional normally open contact forwarded to described in delay circuit for subsequent use, and the common port of conventional N phase control relay corresponds to the conventional common port forwarding delay circuit for subsequent use to.
9. the control circuit of simple type double-power supply switching device as claimed in claim 3, it is characterized in that: describedly for subsequent usely forward conventional delay circuit to and comprise the charge-discharge circuit for subsequent use be sequentially composed in series by fixed resistor, potentiometer and electric capacity, the logic drive circuit be made up of 555 timer integrated circuit, and often drive the standby N phase control relay with normally closed interlock with one group, wherein, be connected with the output of the potentiometer in charge-discharge circuit for subsequent use after the pin 2 of 555 timer integrated circuit connects with pin 6, fixed resistor input in charge-discharge circuit for subsequent use is connected with the cathode output end of the full-wave rectification bridge in stand-by power supply power supply circuits, the pin 1 of 555 timer integrated circuit is connected with the negative pole of the full-wave rectification bridge in stand-by power supply power supply circuits with the electric capacity one end in charge-discharge circuit for subsequent use, the pin 4 of 555 timer integrated circuit is connected with the cathode output end of the full-wave rectification bridge in stand-by power supply power supply circuits with pin 8, standby N phase control relay is driven by the pin 3 of 555 timer integrated circuit by one, and namely coil one end of standby N phase control relay is connected with the cathode output end of the full-wave rectification bridge in stand-by power supply power supply circuits, the other end is connected with the pin 3 of 555 timer integrated circuit, the normally open contact of standby N phase control relay corresponds to the normally open contact forwarded to described in conventional delay circuit for subsequent use, and the common port of standby N phase control relay corresponds to the common port forwarding conventional delay circuit delay circuit to for subsequent use.
10. simple type duplicate supply as claimed in claim 9, it is characterized in that: described control circuit also comprises the condition indication circuit indicating the circuit breaker as main switch whether to be in "on" position, and condition indication circuit is connected with travel switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510156939.1A CN104716735B (en) | 2015-04-04 | 2015-04-04 | A kind of control circuit of simple type double-power supply switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510156939.1A CN104716735B (en) | 2015-04-04 | 2015-04-04 | A kind of control circuit of simple type double-power supply switching device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104716735A true CN104716735A (en) | 2015-06-17 |
| CN104716735B CN104716735B (en) | 2017-03-01 |
Family
ID=53415802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510156939.1A Expired - Fee Related CN104716735B (en) | 2015-04-04 | 2015-04-04 | A kind of control circuit of simple type double-power supply switching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104716735B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107040038A (en) * | 2017-06-02 | 2017-08-11 | 浙江德力西电器有限公司 | A kind of dual power supply conversion control circuit based on 555 timers |
| CN107645205A (en) * | 2017-10-20 | 2018-01-30 | 德力西电气有限公司 | A kind of double power supply converting switch control circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005006516A1 (en) * | 2003-07-14 | 2005-01-20 | Magnetek S.P.A. | Emergency electric power supply unit |
| CN2817180Y (en) * | 2005-04-09 | 2006-09-13 | 凌岩 | Module for controlling dual power supply switching contactor |
| CN101369739A (en) * | 2008-09-28 | 2009-02-18 | 上海宝钢化工有限公司 | Spare power automatic switching device and method for three-segment bus two-segment switch |
| CN102355048A (en) * | 2011-09-19 | 2012-02-15 | 河北工业大学 | Intelligent dual-power automatic transfer switch and running method |
| CN102664465A (en) * | 2012-05-21 | 2012-09-12 | 浙江正泰电器股份有限公司 | Breaker controller with dual-power-source switching function, switching system and switching method |
-
2015
- 2015-04-04 CN CN201510156939.1A patent/CN104716735B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005006516A1 (en) * | 2003-07-14 | 2005-01-20 | Magnetek S.P.A. | Emergency electric power supply unit |
| CN2817180Y (en) * | 2005-04-09 | 2006-09-13 | 凌岩 | Module for controlling dual power supply switching contactor |
| CN101369739A (en) * | 2008-09-28 | 2009-02-18 | 上海宝钢化工有限公司 | Spare power automatic switching device and method for three-segment bus two-segment switch |
| CN102355048A (en) * | 2011-09-19 | 2012-02-15 | 河北工业大学 | Intelligent dual-power automatic transfer switch and running method |
| CN102664465A (en) * | 2012-05-21 | 2012-09-12 | 浙江正泰电器股份有限公司 | Breaker controller with dual-power-source switching function, switching system and switching method |
Non-Patent Citations (2)
| Title |
|---|
| 李克俭等: "智能型双电源自动转换装置的设计", 《智能型双电源自动转换装置的设计》 * |
| 蔡志远等: "自动转换开关电器的发展与应用", 《智能电器》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107040038A (en) * | 2017-06-02 | 2017-08-11 | 浙江德力西电器有限公司 | A kind of dual power supply conversion control circuit based on 555 timers |
| CN107040038B (en) * | 2017-06-02 | 2023-07-25 | 浙江德力西电器有限公司 | Dual-power conversion control circuit based on 555 timer |
| CN107645205A (en) * | 2017-10-20 | 2018-01-30 | 德力西电气有限公司 | A kind of double power supply converting switch control circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104716735B (en) | 2017-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100477439C (en) | Switching power supply with overvoltage protection and overvoltage protection method thereof | |
| CN104882891A (en) | Low-voltage distribution voltage-regulation equipment | |
| CN103488159A (en) | Distribution box type smart home terminal and comprehensive protection controller | |
| CN104135061B (en) | The earth leakage protective DC power-supply system of a kind of band | |
| CN201985762U (en) | Zero power consumption standby circuit and electrical appliance equipment comprising the same | |
| CN104716736A (en) | Control circuit of double-power-supply changeover device | |
| CN106953377B (en) | Mobile energy storage for power supply system control method suitable for multiple access scene | |
| CN203660492U (en) | Microcomputer comprehensive protection device having active/passive automatic switching function | |
| CN203301404U (en) | Intelligent type non-contact low-power starter of single-phase asynchronous motor | |
| CN104716735A (en) | Control circuit of simple double-power-supply changeover device | |
| CN209627045U (en) | The low automatic opening operation power supply device of wind/light energy SF6 breaker air pressure | |
| CN205195255U (en) | Control circuit used for controlling and protecting switching device | |
| CN201191712Y (en) | Low voltage AC cabinet for touching integrated intelligent transforming plant | |
| CN201733105U (en) | Low-voltage intelligent phase-selection switch | |
| CN204103447U (en) | A kind of undervoltage protection device | |
| CN105871056A (en) | Automatic switching circuit of power system | |
| CN205791781U (en) | Power-supply system automatic switch-over circuit | |
| CN209626951U (en) | The low automatic opening operation power supply device of photovoltaic SF6 breaker air pressure | |
| CN211183516U (en) | Power distribution terminal power supply system | |
| CN204442004U (en) | Direct current sectionalized bus device for intelligently switching | |
| CN204333924U (en) | Pumping irrigation well electromotor integrated protection compensatory control case | |
| CN102157283A (en) | Control circuit for transfer switch | |
| CN202067694U (en) | Control circuit of change-over switch | |
| CN202997952U (en) | Power supply module of power distribution terminal | |
| CN103326632A (en) | Intelligent contactless low-power-consumption starter of one-phase asynchronous motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160812 Address after: 528000 Jiangwan Road, Guangdong, No. 18, No. Applicant after: Foshan Science &. Technology College Address before: 528000, two, 920, five, 1, 3, six, Jihua Road, Chancheng District, Guangdong, Foshan Applicant before: Foshan Lan Tu Science and Technology Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170301 Termination date: 20200404 |