CN105337258A - Integrated intelligent motor protector without external power source - Google Patents
Integrated intelligent motor protector without external power source Download PDFInfo
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- CN105337258A CN105337258A CN201510863789.8A CN201510863789A CN105337258A CN 105337258 A CN105337258 A CN 105337258A CN 201510863789 A CN201510863789 A CN 201510863789A CN 105337258 A CN105337258 A CN 105337258A
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Abstract
The invention discloses an integrated intelligent motor protector without an external power source and belongs to the technical field of motor protection. The motor protector comprises a shell and a control circuit fixed in the shell. The motor protector is characterized in that the shell comprises an outer shell body (1) and a control panel (4) arranged on the front end face of the outer shell body (1). The outer shell body (1) is provided with a power source wire connection terminal used for being connected into a motor power supply loop in series, and a series-connection point is located at the wire outlet end of a main contact in the motor power supply loop. The control panel (4) is provided with a control wire connection terminal used for being connected into a motor starting loop in series, the control wire connection terminal is used for achieving connection and disconnection of the motor starting loop, and a power source wire connection unit and a control wire connection unit are connected to the control circuit at the same time. The integrated intelligent motor protector without the external power source is connected to the wire outlet end of the main contact of the motor power supply circuit in series, connection more conforms to the on-site wire connection habit, and no extra external power source is needed.
Description
Technical field
A kind of integral and intelligent, without external power supply type motor protector, belongs to Protection Technology for Motors field.
Background technology
Motor protector is a kind of electric equipment to carrying out general protection during motor running.In the prior art; before use motor protector; first the action parameter of the button by motor protector is arranged to motor protector is needed to arrange; by in motor protecter incoming transport electricity main circuit after being provided with; the operational factor of motor is monitored; when the operational factor of motor occurs exception or reaches presetting action parameter, the main circuit power supply of motor cuts off by motor protector, protects motor.
At present, the general electromagnetic treadle that adopts is serially connected in the current supply circuit of motor as the switching device of motor, and motor protector is arranged between contactor and motor.In the prior art, when the actual use of motor protector, following defect is had:
(1) current motor protector mainly comprises two kinds of form mechanical types (as thermal relay), electron type and intelligent, mechanical protector is applicable to common low capacity alternating current machine, generally be used in condition of work good, there is not the operating mode occasions such as frequent starting; But mechanical motor protector due to precision poor, reliability can not ensure.
The motor protector of electron type is by detecting three-phase electricity flow valuve, and setting current value adopts potentiometer or plucking number sign switch, and circuit generally adopts analog, adopts inverse time lag or specified time operating characteristic.Defencive function comprises overload, phase shortage, stall etc.; fault type adopts indicator light display, and run electricity and adopt numeral method, the motor protector intelligence degree of electron type is lower; cannot realize various parameter and carry out actual setting according to scene, the scope of application is comparatively limited.
Intelligent Asynohornized Protector detects three-phase electricity flow valuve, by chip microcontroller motor intelligent integrated protection, collects protection, measurement, communication, is shown as one.Setting current adopts numeral setting; operated by control panel button; user can set various parameters revision at the scene according to motor concrete condition; use comparatively for convenience of and intelligence degree is higher; but existing Intelligent Asynohornized Protector generally adopts split-type design and volume is larger; cannot carry out unifying to install according to standard mounting means (as DIN guide rails assembling) with other electric components in control cabinet; therefore the layout of the installation of defect in scene and electric component be accustomed to difference comparatively greatly with actual installation, and range of application receives a definite limitation.
(2) current motor protector is on the market active type, external 220V communication power supply is generally needed when namely working, insert if this power supply draws from the independent 220V(arranged such as wall), then need the wiring carrying out separately growing distance, at the scene very defect during wiring;
Although this power supply also can carry out power taking from the main circuit power supply of motor, if but carry out power taking from the downstream of contactor, easy-to-connect, but due at erection stage, for ensureing that safety contactor is in the state of disconnection, therefore the downstream of contactor does not have power supply to power to motor protector, and motor protector cannot carry out the setting of debugging and parameter; If the power supply of motor protector carries out power taking from the upstream of contactor; although now normal power supply can be carried out for motor protector; and the debugging of motor protector can be completed smoothly; but this mode of connection is comparatively complicated; particularly do not meet the normal wiring custom of electrician, therefore limit development and the popularization of motor protector to a certain extent.
(3) current motor protector on the market, in order to gather the parameter of motor in running, need in the current supply circuit of motor, be connected in series separately mutual-inductance apparatus (as current transformer), wiring is comparatively complicated.
In recent years, there is solid-state contactor on the market, solid-state contactor controls silicon controlled break-make by the circuits for triggering of its inside, thus the folding realized circuit and shutoff, because solid-state contactor inside does not have mechanical structure, therefore with the advantage of its high life, high reliability, high sensitivity and low-power consumption, traditional electromagnetic treadle can be replaced in a lot of occasion.
In the prior art; when using solid-state contactor to coordinate motor protector to use as switching device; except having above-mentioned various defects; also have following defect: because the controllable silicon adopted general in solid-state contactor is serially connected in major loop as switch element; for preventing occurring in circuit that the controllable silicon in solid-state contactor punctures by reverse electrical source, be generally provided with rc protection circuit at the output of solid-state contactor main contacts.
Debug phase at the scene; generally carry out zero load debugging; namely when the end of major loop does not connect any load (as motor); and now; because solid-state contactor has accessed in major loop; so the power supply in major loop is constantly charged to the electric capacity in rc protection circuit by the control circuit of solid-state contactor inside; because the end at solid-state contactor does not connect load; so the power supply in rc protection circuit produces leakage current because discharging; therefore leakage current is very easily by commissioning staff's electricity wound, causes security incident and is unfavorable for carrying out smoothly of debugging.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art; there is provided a kind of volume little; easy for installation; the leading-out terminal of main contacts in motor loop is directly connected on during connection; from motor loop, working power is obtained, without the need to the integral and intelligent of external power supply without external power supply type motor protector during work.
The technical solution adopted for the present invention to solve the technical problems is: this integral and intelligent is without external power supply type motor protector, comprise housing and be fixed on the control circuit in housing, it is characterized in that: described housing comprises shell and is arranged on the control panel in case nose face, shell is provided with the power supply terminal for access motor loop of connecting, and serial connection point is arranged in the leading-out terminal of motor loop main contacts; Be provided with one group of control binding post for access motor start-up loop of connecting on the control panel, automatically the switch module kept by an on off state by controlling binding post accesses in motor start-up loop, realizes switching on and off of motor start-up loop; Control panel is also provided with the adjustment display module for setting parameter.
Preferably, described control panel is also provided with a reset switch, reset switch is for the on off state of the described switch module that resets.
Preferably, described adjustment display module comprises display screen and button group.
Preferably, described power supply terminal comprises be arranged on case nose face one group for introducing alternating current input terminal and one group of alternating current outlet terminal for output motor power supply of motor power supply.
Preferably, what described control panel was given prominence to forward is arranged on case nose Middle face.
Preferably, described outer casing back face laterally offers for installing fixing draw-in groove.
Preferably, described control circuit at least comprises:
Current acquisition unit, for gathering, the current value of output motor current supply circuit;
Control setup unit, for receiving the current value in motor loop, and the current value in motor loop is set, shows and controlled;
Automatic electricity getting unit, power taking on motor loop, for powering for current acquisition unit, control setup unit and electronic switch module;
Auxiliary power module, powering for controlling setup unit, realizing the non-transformer work controlling setup unit;
And described switch module.
Preferably, the input of described current acquisition unit is connected in parallel in motor loop, and its output is connected with the input controlling setup unit; Control the output of setup unit to be connected with the control end of switch module.
Preferably, described control setup unit comprises: microprocessor, setting adjustment module and for the storage that realizes data and the memory module transferred.
Preferably, described automatic electricity getting unit comprises: voltage reduction module, rectification module and Voltage stabilizing module, the input of voltage reduction module is connected in motor loop, and output connects the input of rectification module, and the output of rectification module is connected with the input of Voltage stabilizing module.
Preferably, described current acquisition unit comprises at least one group of current transformer and the electric current discharge circuit identical with current transformer quantity, the primary side of current transformer is connected in motor loop, secondary side connects the input of electric current discharge circuit, and the output of electric current discharge circuit is connected with control setup unit.
Preferably, described auxiliary power module comprises and controls the battery that setup unit power input forms current supply circuit and the switch be connected in this current supply circuit.
Preferably, described electronic switch module adopts magnetic latching relay.
Preferably, also comprise in described protector control circuit and being controlled by control setup unit, eliminate unit for the electric current eliminating leakage current.
Preferably, described electric current is eliminated unit and is comprised the multiple bleeder resistances matched with motor loop live wire, bleeder resistance with the link circuit of live wire in be in series with the normally-closed contact of relay, control setup unit and be connected with the coil of relay and control its action.
Compared with prior art, the beneficial effect that the present invention has is:
1, integral and intelligent of the present invention is without external power supply type motor protector, is connected to the leading-out terminal of main contacts in motor loop with the form of connecting, and more meets on-the-spot wiring custom and without the need to extra external power supply.
2, by arranging control terminal on the control panel, be connected to the self-retaining electronic switch of a normally closed type in motor start-up loop, therefore after the action of self-retaining electronic switch, its operate condition can continue to keep.In actual field, after fault is determined and is confirmed to get rid of, field personnel is needed manually to send reset signal by reset switch, motor start-up loop just again can be connected and form loop, therefore avoid and can be automatically reset as power-off back contact during switch element by common relay in prior art and the drawback likely can caused danger, effectively prevent the misconnection of motor loop from leading to, therefore fail safe improves greatly.
3, by arranging display screen, can the malfunction after operating state when the debugging mode before the operation of motor, operation and fault be shown.By arranging button group, the debugging before this integral and intelligent is finished the work without external power supply type motor protector can be realized.
4, outstanding being arranged on case nose face of control panel, is convenient to debug, and control section can be made to be separated with power unit, fail safe is higher simultaneously.
5, on the rear end face of shell, offer draw-in groove, this integral and intelligent can be made to be directly installed on DIN guide rail without external power supply type motor protector by draw-in groove, easy for installation and meet on-the-spot installation wiring custom.
6, by arranging automatic electricity getting unit in the control circuit of this integral and intelligent without external power supply type motor protector; therefore operationally from the current supply circuit of motor, power taking can realize normal work, avoid the drawback that Intelligent Asynohornized Protector in prior art needs external power supply.
7, simultaneously owing to being provided with auxiliary power module; when debugging; by pressing the switch in accessory power supply; can separately for control setup unit power, can make this integral and intelligent without external power supply type motor protector when without when any external power supply realize debugging and optimum configurations.
8, this integral and intelligent is without external power supply type motor protector in place in circuit, and be directly connected in three-phase alternating current by the binding post be arranged on shell, wiring is very convenient.
9, by arranging control setup unit, can be arranged arbitrarily by the key-press module in it to current parameters, range of application is wider, and intelligence degree is higher.
10, unit is eliminated by arranging electric current, when contactor in motor loop adopts solid-state relay, can effectively avoid when not connecing load by circuit reason in the inner and its main contacts end caused still exists the drawback of leakage current, field connection is safer.
Accompanying drawing explanation
Fig. 1 is that integral type intelligence is without external power supply type motor protector front view.
Fig. 2 is that integral type intelligence is without external power supply type motor protector left view.
Fig. 3 is that integral type intelligence is without external power supply type motor protector vertical view.
Fig. 4 is that integral type intelligence is without external power supply type motor protector functional-block diagram.
Fig. 5 is that integral type intelligence controls setup unit functional-block diagram without external power supply type motor protector.
Fig. 6 is that integral type intelligence is without external power supply type motor protector current acquisition unit functional-block diagram.
Fig. 7 is that integral type intelligence eliminates unit functional-block diagram without external power supply type motor protector electric current.
Fig. 8 is that integral type intelligence eliminates element circuit schematic diagram without external power supply type motor protector electric current.
Fig. 9 is that embodiment 2 integral and intelligent is without external power supply type motor protector functional-block diagram.
Figure 10 is that embodiment 3 integral and intelligent eliminates element circuit schematic diagram without external power supply type motor protector electric current.
Wherein: 1, shell 2, alternating current input terminal 3, display screen 4, control panel 5, control terminal 6, alternating current outlet terminal 7, button group 8, DIN guide rail 9, reset switch 10, draw-in groove 11, alternating current connection jaws 12, control end connection jaws.
Embodiment
Fig. 1 ~ 8 are most preferred embodiments of the present invention, and below in conjunction with accompanying drawing 1 ~ 10, the present invention will be further described.
As shown in Fig. 1 ~ 3, integral and intelligent without external power supply type motor protector, the control circuit comprising shell 1 and be arranged in shell 1.The top of shell 1 front end face is provided with one group of alternating current input terminal 2, the upper surface of shell 1 offers with alternating current input terminal 2 one_to_one corresponding simultaneously and the alternating current connection jaws 11 be communicated with; The bottom correspondence of shell 1 front end face is provided with one group of alternating current outlet terminal 6, the lower surface of shell 1 offers with alternating current outlet terminal 6 one_to_one corresponding and the connection jaws of UNICOM simultaneously.When physical cabling, A, B, C three-phase firewire of three-phase four-wire system alternating current accesses in the alternating current connection jaws 11 of shell 1 upper surface respectively, and is locked by the lock-screw in alternating current input terminal 2.Then A, B, C three-phase firewire of alternating current is drawn respectively from the connection jaws of shell 1 lower surface; and locked by the locking nut in alternating current outlet terminal 6; thus achieve this integral and intelligent without external power supply type motor protector with series connection form be connected in the current supply circuit of motor, wiring is very convenient.The rear end face of shell 1 offers draw-in groove 10, this integral and intelligent can be made to be directly installed on DIN guide rail 8 without external power supply type motor protector by draw-in groove 10, easy for installation and meet on-the-spot installation wiring custom.
That gives prominence to forward in the middle part of shell 1 front end face is provided with control panel 4, the left upper portion of control panel 4 is provided with display screen 3, can the malfunction after operating state when the debugging mode before the operation of motor, operation and fault be shown by display screen 3.Below display screen 3, be provided with button group 7, button group 7 can arrange multiple buttons of any amount according to actual conditions, be provided with 4 in the present embodiment.The debugging before this integral and intelligent is finished the work without external power supply type motor protector can be realized by button group 7.Display screen 3 can adopt implemented in many forms, as charactron, liquid crystal display screen, touch-screen etc.
Upper and lowerly on the right side of control panel 4 be provided with one group of control terminal 5, the upper and lower end face of control panel 4 be respectively arranged with one with control terminal 5 one_to_one corresponding and the control end connection jaws 12 be communicated with simultaneously.At this integral and intelligent without in external power supply type motor protector; a normally closed self-retaining electronic switch is connected with between upper and lower two control terminals 5; when physical cabling, this self-retaining electronic switch is connected in the starting-up later time of motor by upper and lower two control terminals 5.
When motor breaks down, the self-retaining electronic switch be connected between upper and lower two control terminals 5 disconnects, and cut off by the starting-up later time of motor, motor loop is cut off, and serves the protective effect to motor.After failture evacuation, be connected to the state that the self-retaining electronic switch between upper and lower two control terminals 5 still remains open, need manually on trigging control panel 4 reset switch 9 be arranged between upper and lower two control terminals 5 the self-retaining electronic switch be connected between upper and lower two control terminals 5 is resetted, make this self-retaining electronic switch reply closure state, now motor start-up loop just can normally start.
This integral and intelligent is had without the control circuit of external power supply type motor protector, the while of the button in the live wire A, the B that are accessed by alternating current input terminal 2, C, display screen 3, button group 7 and reset switch 9 in access control circuit at shell 1 internal fixtion.The self-retaining electronic switch be connected between upper and lower two control terminals 5 controls its break-make by control circuit.
As shown in Figure 4; integral and intelligent comprises control setup unit, current acquisition unit, electric current elimination unit, power taking unit, auxiliary power module, self-retaining electronic switch and three groups of binding posts without the control circuit of external power supply type motor protector: terminal A1, terminal B1, terminal C1, terminal A2, terminal B2, terminal C2 and terminal D1, terminal E1.Terminal A1, terminal B1, terminal C1 are above-mentioned alternating current input terminal 2, are respectively used to incoming transport electricity A, B, C three-phase firewire; Terminal A2, terminal B2, terminal C2 are above-mentioned alternating current outlet terminal 6, are respectively used to draw alternating current A, B, C three-phase firewire; Terminal D1, terminal E1 are above-mentioned control terminal 5.
Actual carry out field connection time; this integral and intelligent is arranged on the downstream of contactor KM1 main contacts KM1-1 ~ KM1-3 without external power supply type motor protector; three-phase alternating current A, B, C access terminal A1, terminal B1 after main contacts KM1-1 ~ KM1-3, terminal C1 inputs; then export through terminal A2, terminal B2, terminal C2; namely this integral and intelligent without external power supply type motor protector when physical cabling; directly be connected in three-phase alternating current A, B, C, wiring is very convenient.In the present embodiment, contactor KM1 adopts solid-state relay.
After three-phase alternating current A, B, C access terminal A1, terminal B1, terminal C1 respectively, the input of current acquisition unit is connected in parallel on A, B, C three-phase alternating current respectively, the input of its output connection control setup unit.The output controlling setup unit is connected with self-retaining electronic switch control signal input, self-retaining electronic switch is connected in motor start-up loop, motor start-up loop realizes, as self-sustaining starting-up later time by any starting-up later time of prior art.Can also arrange electric current cancellation module in control circuit, electric current cancellation module is connected with A, B, C three-phase alternating current simultaneously, and the output controlling setup unit is connected with the control signal input that electric current eliminates unit.Automatic electricity getting unit is provided with in control circuit, automatic electricity getting unit is connected on any two of three-phase alternating current A, B, C, for above-mentioned self-retaining electronic switch, current acquisition unit, control setup unit and electric current cancellation module carry out power (concrete confession does not draw in electric connection mode Fig. 1), also being provided with in control setup unit can separately for controlling the auxiliary power module that setup unit is powered, for when automatic electricity getting unit is work, carry out temporary power for controlling setup unit, the convenient setup unit that controls carries out optimum configurations.
Current acquisition unit is used for the electric current gathering alternating current A, B, C three-phase phase line respectively, and is delivered to by the electric current collected in control setup unit.Control the current value of setup unit to A, B, C triple line that current acquisition unit is sent into analyze; when current value occurs abnormal; control setup unit and control the action of self-retaining electronic switch; motor start-up loop is cut off; the contactor main contacts be now connected in motor major loop disconnects; motor stops operating, and serves the object protected motor.When integral and intelligent works without external power supply type motor protector, by the automatic electricity getting unit in it, whole control circuit is powered, avoid in prior art, need the drawback of independent external power supply.
As shown in Figure 5, control setup unit and comprise microprocessor, memory module, display module and key-press module.The input/output terminal of memory module and microprocessor is bi-directionally connected, and the signal output part of microprocessor is connected with the input of display module, and key-press module is connected with the input of microprocessor.Key-press module is the above-mentioned button group 7 be arranged on control panel 4, for being set, as current value etc. the operational data of integral and intelligent without external power supply type motor protector by microprocessor; Display module is used for showing without the operating state in external power supply type motor protector debug process and when normally working integral and intelligent.
The output signal of above-mentioned current acquisition unit is connected with microprocessor, and microprocessor is analyzed the current signal that current acquisition unit inputs.The signal output part of microprocessor is eliminated unit with above-mentioned self-retaining electronic switch and electric current respectively and is carried out being connected and controlling.
As shown in Figure 6, current acquisition unit comprises respectively to alternating current A, B, C triple line electric current carries out the A phase current mutual inductor gathered, B phase current mutual inductor and C phase current mutual inductor, A phase current mutual inductor, the two ends of the first side winding of B phase current mutual inductor and C phase current mutual inductor are connected on alternating current A respectively, B, in C three-phase, A phase current discharge circuit is accessed at the two ends of its secondary side winding respectively, the input of B phase current discharge circuit and C phase current discharge circuit, A phase current discharge circuit, the output of B phase current discharge circuit and C phase current discharge circuit is connected with the signal input part of microprocessor.
In current acquisition unit, A phase current mutual inductor, B phase current mutual inductor and C phase current mutual inductor are respectively to alternating current A, B, electric current in C triple line gathers, its secondary side exports the electric current collected to A phase current discharge circuit respectively, in B phase current discharge circuit and C phase current discharge circuit, by A phase current discharge circuit, B phase current discharge circuit and the current value of C phase current discharge circuit to corresponding phase line amplify, and by amplify after deliver in the different signal input part of microprocessor respectively, analyzed by the current value of microprocessor to each phase line and monitored.A phase current discharge circuit, B phase current discharge circuit and C phase current discharge circuit realize by the integrated operational amplifier of routine.
As shown in Figure 7, electric current elimination unit comprises bleeder resistance and relay.The number of phases of the live wire used in the number of bleeder resistance and motor loop matches.In the present embodiment, adopt three-phase four-wire system, therefore bleeder resistance is provided with single and is connected in parallel on respectively in alternating current A, B, C triple line and forms loop, the normally-closed contact of relay is connected between bleeder resistance and alternating current A, B, C three-phase, the coil of relay is by the Microprocessor S3C44B0X break-make controlled in setup unit, and the usage quantity of the normally-closed contact of relay is identical with the quantity of bleeder resistance or fewer than the quantity of bleeder resistance one.
Be illustrated in figure 8 electric current in the present embodiment and eliminate the circuit theory diagrams of unit, one end of resistance R1 ~ R3 is connected in parallel on phase line A, phase line B, phase line C respectively, is connected in parallel on the other end of resistance R2 after the other end series connection normally-closed contact K1-1 ~ K1-2 of resistance R1, resistance R3 simultaneously.Resistance R1 ~ R3 is bleeder resistance, and it is not shown in FIG. that normally-closed contact K1-1 ~ K1-2 is respectively relay K 1() normally-closed contact.When debugging, when alternating current A, B, C triple line least significant end does not connect load (as motor), owing to now there is no electric current in alternating current A, B, C triple line, therefore microprocessor does not send drive singal to relay K 1, therefore form loop between alternating current A, B, C triple line and bleeder resistance R1 ~ R3, the leakage current that solid-state contactor outlet terminal exists is released through bleeder resistance; When contactor end access motor and after starting working, after microprocessor collects current value by current acquisition unit, by sending drive singal to relay K 1, the coil of relay K 1 powers on action, normally-closed contact K1-1 ~ K1-2 disconnects, and does not affect the normal operation of motor.
Automatic electricity getting unit comprises transformer, rectification module and Voltage stabilizing module; the primary side of transformer is connected in parallel on any two of alternating current A, B, C triple line respectively; the secondary side of transformer connects the input of rectification module; the output of rectification module connects at least one Voltage stabilizing module according to circuit requirements; signal rectification obtained converts the different voltage signal of voltage to, powers to the control circuit of this integral and intelligent without external power supply type motor protector.
The battery (as button cell) that auxiliary power module comprises a joint small volume and the button be connected in battery output loop, this button is one in Fig. 1 in button group 7.When this button is connected, the battery in auxiliary power module starts outwards to export electric energy.Auxiliary power module, when needs are debugged, is powered to control setup unit, is conveniently sent instruction by button to microprocessor in the debug phase, complete the setting of integral and intelligent without external power supply type motor protector operational factor.
In the present embodiment, self-retaining electronic switch is realized by magnetic latching relay, for driving two of magnetic latching relay closed and disconnected groups of coils to be all connected with microprocessor, by microprocessor output drive voltage, for driving magnetic latching relay action.The normally-closed contact of magnetic latching relay is connected in motor start-up loop, when controlling the microprocessor in setup unit and current anomaly in alternating current A, B, C triple line being detected, send drive singal to magnetic latching relay, the normally-closed contact of magnetic latching relay disconnects and the state remained open.After the normally-closed contact disconnection of magnetic latching relay, motor start-up loop disconnects, and now the main contacts of contactor disconnects, and motor is out of service, serves the protective effect to motor.
Owing to have employed magnetic latching relay as switch elements in series in motor start-up loop, therefore after the action of microprocessor driven magnetic latching relay, its operate condition can continue to keep.Be applied in actual field, after the current supply circuit of motor is cut off by self-retaining electronic switch by microprocessor, motor start-up loop can be in off-state all the time, after fault is determined and is confirmed to get rid of, field personnel manually presses the reset switch 9 in Fig. 1, sent the drive singal of reset to magnetic latching relay by control setup unit, the normally-closed contact of magnetic latching relay resets, motor driven loop just again can be connected and form loop, therefore avoiding can automatically reset drawback as power-off back contact during switch element by common relay in prior art, because relay can automatically reset motor start-up loop connected automatically, if therefore in debug process, fault is got rid of not yet completely, and the misconnection of motor loop is led to, likely can cause danger.And by adopting magnetic latching relay as switch element, only after confirmation fault is got rid of completely, more manually realized resetting by staff, therefore fail safe improves greatly.
Due to after motor start-up loop is cut-off; this integral and intelligent cannot normally work without the automatic electricity getting unit in external power supply type motor protector control circuit; therefore when resetting to magnetic latching relay; need first to connect auxiliary power module; then send reset signal by pressing reset switch 9 to microprocessor, microprocessor sends reset drives signal to magnetic latching relay again.
Specific works process and operation principle as follows:
In the debug phase; this integral and intelligent is connected in the current supply circuit of motor without external power supply type motor protector; and be arranged on the downstream of motor contactor by the form of series connection, and the one end in motor start-up loop is connected to the interface (terminal D1, terminal E1) of self-retaining electronic switch.After wiring completes; staff presses the switch in accessory power supply; boosting battery now in Auxiliary Power Units is powered to control setup unit; staff is arranged the operational factor of this integral and intelligent without external power supply type motor protector by the key-press module controlled in setup unit; after optimum configurations completes; cut off the switch in accessory power supply, accessory power supply stops powering for controlling setup unit.Complete setting parameter and after confirming that circuit is errorless, field personnel connects motor start-up loop, and the current supply circuit of motor is connected, and motor is started working.While the current supply circuit connection of motor; this integral and intelligent starts normal work without the automatic electricity getting unit in external power supply type motor protector control circuit, and powers to current acquisition unit, control setup unit, electric current elimination unit and self-retaining electronic switch.
In the process of motor work, this integral and intelligent gathers without the current value of current acquisition unit to alternating current A, B, C three-phase in external power supply type motor protector control circuit and the current value collected is delivered to the microprocessor controlled in setup unit.When microprocessor detects that abnormal (as electric current exceedes pre-set value) appears in any phase current values of alternating current A, B, C three-phase, microprocessor phase self-retaining electronic switch sends drive singal, motor start-up loop cuts off by the action of self-retaining electronic switch, and keep the state of cut-out, contactor main contacts now in motor loop disconnects, and motor is out of service.
After the current supply circuit of motor is cut off by self-retaining electronic switch by microprocessor, motor start-up loop can be in off-state all the time, after fault is determined and is confirmed to get rid of, field personnel manually sends the drive singal of reset to magnetic latching relay by control setup unit, the normally-closed contact of magnetic latching relay resets, motor driven loop just again can be connected and form loop, then field personnel is by motor start-up loop actuating motor again, and motor brings into operation again.
In the debug phase, if motor is not yet connected in its current supply circuit, namely when motor loop is in Light Condition, because now solid-state contactor is due to the reason of its internal circuit, the end of its main contacts still has leakage current, form loop between bleeder resistance R1 ~ R3 that now alternating current A, B, C triple line and electric current are eliminated in unit, the power supply that solid-state contactor outlet terminal exists is released through bleeder resistance; When contactor end access motor and after starting working, microprocessor sends drive singal by phase relay K1 after collecting current value by current acquisition unit, and the coil of relay K 1 powers on action, normally-closed contact K1-1 ~ K1-2 disconnects, and does not affect the normal operation of motor.
Embodiment 2:
Embodiment 2 is with the difference of embodiment 1: in the present embodiment, and the contactor in motor loop adopts ordinary electromagnetic formula contactor.Owing to have employed electromagnetic treadle, therefore when the zero load of motor loop, there is not leakage current in the end of electromagnetic treadle main contacts, therefore as shown in Figure 9, in the present embodiment the electric current inside embodiment 1 eliminated unit and save.
Embodiment 3:
Embodiment 3 is with the difference of embodiment 1: eliminate in unit at the electric current of the present embodiment, is provided with three bleeder resistances and employs the single normally-closed contact of relay.As shown in Figure 7: one end of resistance R4 ~ R6 is connected in parallel on phase line A, phase line B and phase line C respectively, the other end of resistance R4 ~ R6 is connected respectively after normally-closed contact K2-1 ~ K2-3 and is connected.Resistance R4 ~ R6 is bleeder resistance, and it is not shown in FIG. that normally-closed contact K2-1 ~ K2-3 is respectively relay K 2() normally-closed contact.When debugging, when alternating current A, B, C triple line least significant end does not connect load (as motor), owing to now there is no electric current in alternating current A, B, C triple line, therefore microprocessor does not send drive singal to relay K 2, therefore form loop between alternating current A, B, C triple line and bleeder resistance R4 ~ R6, the power supply that solid-state contactor outlet terminal exists is released through bleeder resistance; When contactor end access motor and after starting working, microprocessor sends drive singal by phase relay K2 after collecting current value by current acquisition unit, and the coil of relay K 2 powers on action, normally-closed contact K2-1 ~ K2-3 disconnects, and does not affect the normal operation of motor.
Embodiment 4:
Embodiment 4 is with the difference of embodiment 1: in the present embodiment, the magnetic latching relay in self-retaining electronic switch is replaced by hand reset relay.After controlling the microprocessor driven hand reset relay action in setup unit, the normally-closed contact in it disconnects, and motor start-up loop disconnects.Normally-closed contact after hand reset relay action in it still can not automatically reset.After field failure confirms to remove, field personnel manually presses the reset key on hand reset relay, normally-closed contact now in hand reset relay recovers closure state again, serve technique effect in the same manner as in Example 1, need manually to be realized resetting by staff, fail safe improves greatly.
Embodiment 5:
Embodiment 5 is with the difference of embodiment 1: in the present embodiment; battery in auxiliary unit module can be replaced by charge type battery; and corresponding charging circuit is set; automatic electricity getting unit is when normally working; be that charge type battery in auxiliary power module charges by charging circuit, therefore improve the useful life of this integral and intelligent without external power supply type motor protector.
Embodiment 6:
Embodiment 6 is with the difference of embodiment 1: in the present embodiment, the transformer in automatic electricity getting unit replaces, as resistance-capacitance depressurization by other forms of reduction voltage circuit.
Without external power supply type motor protector in the specific implementation, the technical scheme adopted can be the combination in any of above each embodiment to this integral and intelligent.This integral and intelligent also can be applied in the current supply circuit of other motor, as 220V ac power supply circuit without external power supply type motor protector.
The above is only preferred embodiment of the present invention, and be not restriction the present invention being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the Equivalent embodiments of equivalent variations.But everyly do not depart from technical solution of the present invention content, any simple modification, equivalent variations and the remodeling done above embodiment according to technical spirit of the present invention, still belong to the protection range of technical solution of the present invention.
Claims (10)
1. an integral and intelligent is without external power supply type motor protector, comprise housing and be fixed on the control circuit in housing, it is characterized in that: described housing comprises shell (1) and is arranged on the control panel (4) of shell (1) front end face, shell (1) is provided with the power supply terminal for access motor loop of connecting, and serial connection point is arranged in the leading-out terminal of motor loop main contacts; Control panel (4) is provided with one group of control binding post for access motor start-up loop of connecting, automatically the switch module kept by an on off state by controlling binding post accesses in motor start-up loop, realizes switching on and off of motor start-up loop; Control panel (4) is also provided with the adjustment display module for setting parameter.
2. integral and intelligent according to claim 1 is without external power supply type motor protector; it is characterized in that: on described control panel (4), be also provided with a reset switch (9), reset switch (9) is for the on off state of the described switch module that resets.
3. integral and intelligent according to claim 1 is without external power supply type motor protector, it is characterized in that: described adjustment display module comprises display screen (3) and button group (7).
4. integral and intelligent according to claim 1 is without external power supply type motor protector, it is characterized in that: described power supply terminal comprises a group of being arranged on shell (1) front end face is used for output motor power supply alternating current outlet terminal (6) for the alternating current input terminal (2) and a group introducing motor power supply.
5. the integral and intelligent according to any one of claim 1 ~ 2, without external power supply type motor protector, is characterized in that: what described control panel (4) was given prominence to forward is arranged in the middle part of shell (1) front end face.
6. the integral and intelligent according to claim 1 or 4, without external power supply type motor protector, is characterized in that: laterally offer for installing fixing draw-in groove (10) on described shell (1) rear end face.
7. integral and intelligent according to claim 1 is without external power supply type motor protector, it is characterized in that: described control circuit at least comprises:
Current acquisition unit, for gathering, the current value of output motor current supply circuit;
Control setup unit, for receiving the current value in motor loop, and the current value in motor loop is set, shows and controlled;
Automatic electricity getting unit, power taking on motor loop, for powering for current acquisition unit, control setup unit and electronic switch module;
Auxiliary power module, powering for controlling setup unit, realizing the non-transformer work controlling setup unit;
And described switch module.
8. integral and intelligent according to claim 7 is without external power supply type motor protector, it is characterized in that: the input of described current acquisition unit is connected in parallel in motor loop, and its output is connected with the input controlling setup unit; Control the output of setup unit to be connected with the control end of switch module.
9. integral and intelligent according to claim 7 is without external power supply type motor protector, it is characterized in that: described control setup unit comprises: microprocessor, setting adjustment module and for the storage that realizes data and the memory module transferred.
10. integral and intelligent according to claim 7 is without external power supply type motor protector; it is characterized in that: described automatic electricity getting unit comprises: voltage reduction module, rectification module and Voltage stabilizing module; the input of voltage reduction module is connected in motor loop; output connects the input of rectification module, and the output of rectification module is connected with the input of Voltage stabilizing module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510863789.8A CN105337258A (en) | 2015-12-01 | 2015-12-01 | Integrated intelligent motor protector without external power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510863789.8A CN105337258A (en) | 2015-12-01 | 2015-12-01 | Integrated intelligent motor protector without external power source |
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| CN105337258A true CN105337258A (en) | 2016-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510863789.8A Pending CN105337258A (en) | 2015-12-01 | 2015-12-01 | Integrated intelligent motor protector without external power source |
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| CN2269016Y (en) * | 1996-08-19 | 1997-11-26 | 甘立东 | Separate motor protector without external power |
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| CN2269016Y (en) * | 1996-08-19 | 1997-11-26 | 甘立东 | Separate motor protector without external power |
| US20070228834A1 (en) * | 2006-03-28 | 2007-10-04 | Fujitsu Limited | Uninterruptible power supply apparatus |
| CN203722519U (en) * | 2013-12-31 | 2014-07-16 | 天津北方恒业电气技术有限公司 | Intelligent type motor starter |
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Effective date of registration: 20180423 Address after: 255086 No. 607, E block, torch Plaza, No. 111, Liu Quan Road, hi tech Zone, Zibo, Shandong Applicant after: Shandong reclamation Auto-control Technology Co., Ltd. Address before: 255400 Wang Zhuang, Linzi, Linzi District, Zibo, China Applicant before: Shang Xiao |
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