CN205123234U - No external power supply type motor protector of intelligence - Google Patents
No external power supply type motor protector of intelligence Download PDFInfo
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- CN205123234U CN205123234U CN201520979560.6U CN201520979560U CN205123234U CN 205123234 U CN205123234 U CN 205123234U CN 201520979560 U CN201520979560 U CN 201520979560U CN 205123234 U CN205123234 U CN 205123234U
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Abstract
The utility model provides a no external power supply type motor protector of intelligence, belongs to motor protection technical field. Including shell, binding post and the protector control circuit of setting on the shell, its characterized in that: the leading -out terminal of series connection contactor main contacts in the motor power supply return circuit, protector control circuit include at least: unit, electronic switch module are set for in electric current acquisition unit, control, electric unit and auxiliary power supply module ask for. Consequently be provided with the electric unit of asking for in this no external power supply type motor protector of intelligence's control circuit, realize normal work getting the electricity in the power supply loop of motor can be followed to the during operation, avoided among the prior art intelligent motor protector to need external power supply's drawback. Owing to set up auxiliary power supply module, can set for the unit for control alone and supply power simultaneously, make this no external power supply type motor protector of intelligence realize debugging and parameter setting under no any external power supply's the circumstances.
Description
Technical field
A kind of intelligence, 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 is on the market active type, namely the communication power supply of external 220V is operationally generally needed, if distant between power supply and motor protecter, 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.
(2) 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 problems to be solved in the utility model is: overcome the deficiencies in the prior art, provides and is directly connected in motor loop during a kind of installation, easy-to-connect; From motor loop, obtain working power during work, achieve the intelligence of passive debugging without the need to external power supply without external power supply type motor protector simultaneously.
The utility model solves the technical scheme that its technical problem adopts: this intelligence is without external power supply type motor protector; comprise shell and fixing control circuit in the enclosure; control circuit is connected in motor loop and motor start-up loop simultaneously, it is characterized in that: described protector 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;
Electronic switch module, is controlled by control setup unit, for cutting off and connecting motor start-up loop;
Automatic electricity getting unit, power taking on motor loop, for powering for current acquisition unit, control setup unit and electronic switch module;
And auxiliary power module, for powering for controlling setup unit, realize the non-transformer work controlling setup unit.
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; The output controlling setup unit is connected with the control end of the electronic switch module be connected in motor start-up loop.
Preferably, described control setup unit at least comprises microprocessor, and its input is connected with the output of current acquisition unit, and its output is connected with the control end of electronic switch module.
Preferably, described control setup unit also comprises:
Display module, for carrying out the display of running status;
Key-press module, for setting;
And memory module, for realizing the storage of data and transferring.
Preferably, described automatic electricity getting unit comprises: voltage changing module, rectification module and Voltage stabilizing module, the input of voltage changing 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, in the link circuit of bleeder resistance and live wire, 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.
Preferably, described shell is provided with binding post, protector control circuit is connected on the leading-out terminal of contactor main contacts in motor loop by binding post.
Compared with prior art, the beneficial effect that the utility model has is:
1, in the control circuit of this intelligence without external power supply type motor protector, automatic electricity getting unit is provided with; therefore operationally power taking normal work can be realized from the current supply circuit of motor, avoid the drawback that Intelligent Asynohornized Protector in prior art needs external power supply.
2, 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 intelligence without external power supply type motor protector when without when any external power supply realization debug and optimum configurations.
3, this intelligence 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.
4, 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.In actual field, after fault is determined and is confirmed to get rid of, field personnel is needed manually to send the drive singal of reset to magnetic latching relay, motor driven 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.
5, 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.
6, this intelligence is without external power supply type motor protector, and when carrying out physical cabling, access point is positioned at the leading-out terminal of contactor main contacts, more meets on-the-spot wiring custom.
7, 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 intelligence is without external power supply type motor protector functional-block diagram.
Fig. 2 is that intelligence controls setup unit functional-block diagram without external power supply type motor protector.
Fig. 3 is that intelligence is without external power supply type motor protector current acquisition unit functional-block diagram.
Fig. 4 is that intelligence eliminates unit functional-block diagram without external power supply type motor protector electric current.
Fig. 5 is that intelligence eliminates element circuit schematic diagram without external power supply type motor protector electric current.
Fig. 6 is that embodiment 2 intelligence is without external power supply type motor protector functional-block diagram.
Fig. 7 is that embodiment 3 intelligence eliminates element circuit schematic diagram without external power supply type motor protector electric current.
Embodiment
Fig. 1 ~ 5 are most preferred embodiments of the present utility model, are described further below in conjunction with accompanying drawing 1 ~ 7 pair of the utility model.
Embodiment 1:
A kind of intelligence, without external power supply type motor protector, comprises a shell and setting control circuit in the enclosure.Shell is at least provided with two groups of binding posts: terminal A1, terminal B1, terminal C1 and terminal A2, terminal B2, terminal C2, terminal A1, terminal B1, terminal C1 and terminal A2, terminal B2, terminal C2 access in the control circuit in shell simultaneously.Actual carry out field connection time; to be arranged on contactor KM1(without external power supply type motor protector not shown in FIG. for intelligence) downstream of main contacts KM1-1 ~ KM1-3; 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 intelligence 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.
As shown in Figure 1, this intelligence comprises control setup unit, current acquisition unit, electric current elimination unit, power taking unit, auxiliary power module and self-retaining electronic switch without the control circuit of external power supply type motor protector.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 by the binding post (terminal D1, terminal E1) be arranged on shell, 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 intelligence 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 2, 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 used for being set, as current value etc. the operational data of intelligence 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 intelligence.
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 3, 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 4, 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 5 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 intelligence 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, 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, completes the setting of intelligence without external power supply type motor protector operational factor.
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 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, 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 intelligence 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; and sending reset signal by the button controlled in setup unit in key-press module to microprocessor, microprocessor sends reset drives signal to magnetic latching relay again.In the key-press module of control unit, a button for driving self-sustaining electronic switch module to reset can be set separately, also can by carrying out program setting to microprocessor, by the button for carrying out setting parameter by certain keystroke pattern (as pressed certain or certain several key certain hour simultaneously), send instruction to microprocessor, reach microprocessor phase magnetic latching relay and send the object driving reset signal.
Specific works process and operation principle as follows:
In the debug phase; this intelligence 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 intelligence 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 intelligence 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 intelligence 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 electric leakage building, 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 electric leakage building in the end of electromagnetic treadle main contacts, therefore as shown in Figure 6, 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 intelligence 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 intelligence.This intelligence 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, it is only preferred embodiment of the present utility model, be not restriction the utility model 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 solutions of the utility model content, any simple modification, equivalent variations and the remodeling done above embodiment according to technical spirit of the present utility model, still belong to the protection range of technical solutions of the utility model.
Claims (10)
1. an intelligence is without external power supply type motor protector; comprise shell and fixing control circuit in the enclosure; control circuit is connected in motor loop and motor start-up loop simultaneously, it is characterized in that: described protector 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;
Electronic switch module, is controlled by control setup unit, for cutting off and connecting motor start-up loop;
Automatic electricity getting unit, power taking on motor loop, for powering for current acquisition unit, control setup unit and electronic switch module;
And auxiliary power module, for powering for controlling setup unit, realize the non-transformer work controlling setup unit.
2. intelligence according to claim 1 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; The output controlling setup unit is connected with the control end of the electronic switch module be connected in motor start-up loop.
3. intelligence according to claim 1 and 2 is without external power supply type motor protector; it is characterized in that: described control setup unit at least comprises microprocessor; its input is connected with the output of current acquisition unit, and its output is connected with the control end of electronic switch module.
4. intelligence according to claim 1 and 2 is without external power supply type motor protector, it is characterized in that: described control setup unit also comprises:
Display module, for carrying out the display of running status;
Key-press module, for setting;
And memory module, for realizing the storage of data and transferring.
5. intelligence according to claim 1 is without external power supply type motor protector; it is characterized in that: described automatic electricity getting unit comprises: voltage changing module, rectification module and Voltage stabilizing module; the input of voltage changing 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.
6. intelligence according to claim 1 is without external power supply type motor protector; it is characterized in that: 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.
7. intelligence according to claim 1 is without external power supply type motor protector, it is characterized in that: 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.
8. intelligence according to claim 1 is without external power supply type motor protector, it is characterized in that: described electronic switch module adopts magnetic latching relay.
9. intelligence according to claim 1 is without external power supply type motor protector, it is characterized in that: also comprise in described protector control circuit and being controlled by control setup unit, eliminates unit for the electric current eliminating leakage current.
10. intelligence according to claim 9 is without external power supply type motor protector; it is characterized in that: described electric current is eliminated unit and comprised the multiple bleeder resistances matched with motor loop live wire; in the link circuit of bleeder resistance and live wire, 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.
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| CN201520979560.6U CN205123234U (en) | 2015-12-01 | 2015-12-01 | No external power supply type motor protector of intelligence |
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| CN201520979560.6U CN205123234U (en) | 2015-12-01 | 2015-12-01 | No external power supply type motor protector of intelligence |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105262052A (en) * | 2015-12-01 | 2016-01-20 | 商晓 | Intelligent motor protector without external power source |
| CN106291032A (en) * | 2016-08-04 | 2017-01-04 | 中国电子科技集团公司第四十研究所 | A kind of current detecting unit leakage current eliminates circuit and removing method |
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2015
- 2015-12-01 CN CN201520979560.6U patent/CN205123234U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105262052A (en) * | 2015-12-01 | 2016-01-20 | 商晓 | Intelligent motor protector without external power source |
| CN106291032A (en) * | 2016-08-04 | 2017-01-04 | 中国电子科技集团公司第四十研究所 | A kind of current detecting unit leakage current eliminates circuit and removing method |
| CN106291032B (en) * | 2016-08-04 | 2019-03-26 | 中国电子科技集团公司第四十一研究所 | A kind of current detecting unit leakage current eliminates circuit and removing method |
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