CN2364609Y - Integrated protector for motor - Google Patents
Integrated protector for motor Download PDFInfo
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- CN2364609Y CN2364609Y CN 98216042 CN98216042U CN2364609Y CN 2364609 Y CN2364609 Y CN 2364609Y CN 98216042 CN98216042 CN 98216042 CN 98216042 U CN98216042 U CN 98216042U CN 2364609 Y CN2364609 Y CN 2364609Y
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Abstract
The utility model relates to an integrated protector for a motor. The existing motor is lack of an integrated protection device. The utility model comprises an external shell 1, and an ammeter 2, an inductance coil 3 and a wire connecting terminal 4 thereof, a group of display lamps 5, a current adjusting knob 6, a Y-delta current adjusting knob 12, and a time adjusting knob 7 which are arranged on the external shell. A circuit board comprises a power circuit, an overload protection circuit, a motor phase failure protection circuit, a detection circuit, a star-angle joint converting circuit and a bus circuit indicator circuit and is arranged in the external shell. The external shell is divided into an upper body and a lower body, and plugging joints connecting the circuits are respectively arranged on the upper and the lower bodies.
Description
The utility model relates on a kind of electrical network that is used in three-phase electricity and carries out the integrated protection device for threephase asynchronous machine.
Lack effective integrated protection device during existing operation, it is not steady that △-Y connects conversion.
The purpose of this utility model is to provide a kind of comprehensive protector of motor, realizes overload protection, the △-Y of motor are connect the energy-conservation and integrated protection that Comprehensive Control such as smooth conversion, open phase protection, remote control and bus current indication realize motor.
The purpose of this utility model is achieved in that
A kind of comprehensive protector of motor; its composition comprises: shell; be installed in the ammeter on the described shell; be installed in inductance coil and binding post and one group of work display lamp on the described shell; the Current Regulation button also is housed on described shell; Y-△ Current Regulation button and time adjusting knob; in described shell, circuit board is housed; comprise on the described circuit board: power circuit; the overload protecting circuit that links to each other with described power circuit; the motor open-phase protection circuit that links to each other with power circuit; the testing circuit that links to each other with power circuit; the star that links to each other with power circuit-corner connection change-over circuit; the bus circuit indicating circuit that links to each other with power circuit; described shell is split type up and down, and the joint that patches that connects circuit is housed respectively on the last lower body.
Advantage of the present utility model is:
1. running parameters such as each electric current of the integrated degree height of the integrated circuit of Cai Yonging, stable performance, setting and time do not drift about.
2. circuit design is concise, failure rate is low.
3. △-Y is set switches through buffer swapping, adopt the soft start mode of operation, establish delay circuit simultaneously, make conversion rationally, steadily.Switching current bound set point is adjustable continuously.
4. split-type structural is convenient to debugging, maintenance, mounting or dismounting.
5. function is maximum, and adjustable device is provided with rationally, and is widely applicable.Wherein remote control distance is greater than 20 meters, and individual event overload protection electric current is adjustable continuously at 2A-100A, and the protection delay time is adjustable continuously second at 5-90, and the open phase protection electric current rises continuously adjustable at 0.5A, and applicable 380V, 660V power supply.
Little, the compact conformation of volume, cost low, have a large tracts of land promotional value.
Accompanying drawing 2 is structural representations of the first half after the utility model is taken apart.
Accompanying drawing 3 is structural representations of the Lower Half after the utility model is taken apart.
Accompanying drawing 4 is circuit diagrams of the present utility model
Be further described below in conjunction with accompanying drawing:
Embodiment 1: a kind of comprehensive protector of motor; its composition comprises: shell 1; be installed in the ammeter 2 on the described shell 1; the inductance coil 3 that is installed on the described shell 1 comprises: inductance coil (L1); inductance coil (L2) and inductance coil (L3) and binding post thereof and one group of work display lamp 5; work display lamp 5 comprises: overload protection indicator light 9; open phase protection indicator light 10; Y/ △ connects indicator light 11 grades and on described shell 1 Current Regulation button 6 is housed also; Y-△ Current Regulation button 12 and time adjusting knob 7; in described shell 1, circuit board 8 is housed; comprise on the described circuit board 8: power circuit; the overload protecting circuit that links to each other with described power circuit; the motor open-phase protection circuit that links to each other with power circuit; the testing circuit that links to each other with power circuit; the star that links to each other with power circuit-corner connection change-over circuit; the bus circuit indicating circuit that links to each other with power circuit; described shell is split type up and down, on; be equipped with respectively on the lower house to connect and be installed in; the bell and spigot joint 13 and 13 of one group of correspondence of the circuit on the lower house '.
Embodiment 2: embodiment 1 described comprehensive protector of motor; its power circuit can comprise: the power line of drawing from three-phase electricity; an input (～) that connects rectifier bridge through electrochemical capacitor (C1) wherein; another root connects another input (～) of rectifier bridge, the output of rectifier bridge " " be labeled as
And through resistance (R1) connect voltage-stabiliser tube (DW1) produce D.C. regulated power supply (+12V) give circuit supply, electric capacity (C2) is connected in parallel on the voltage-stabiliser tube (DW1), the input termination dc power anode of pressurizer (7806) (+12V), the L ground connection of pressurizer, the output of pressurizer be dc voltage power supply (+6V), on described shell, be provided with " starting; stop; shaking control " change over switch, the common port of switch connects the base stage of triode (T8) through resistance (R26), the grounded emitter of triode (T8), collector connecting relay (J3) coil one end, another termination dc power anode of this coil (+12V), " startup " termination DC power supply of described change over switch (+6V), it is unsettled " to stop " end, the output signal (D0) of " remote control " termination receiver of remote-control sytem, when switch is positioned at " startup ", triode (T8) conducting, make relay (J3) coil electricity, its contact J3-1 and J3-2 closure, start-up circuit work, the while starter motor, when switch is positioned at " stopping ", not conducting of triode (T8), starter motor not, when switch was positioned at " remote control ", triode (T8) base voltage was by the output signal D0 control of receiver, therefore can control triode (T8) whether conducting, the i.e. start-stop of motor with remote control transmitter.
The power supply of receiver end on the one hand through diode (D11) connect pressurizer (7806) output head anode (+6V), connect the 3.6V storage battery utmost point through diode (D12) on the other hand, the utmost point of storage battery and circuit are connected to resistance (R27) between the utmost point of storage battery and the receiver utmost point altogether.The circuit of being made up of C14, D11, D12, R27 charges a battery simultaneously to circuit supply when electrical network powers on, and powers to receiver when grid power blackout, and receiver output signal D0 is remained unchanged.When electrical network powers on once more, directly control the startup of motor by the D0 signal, realize self-starting.Realized the function of remote control thus.
Embodiment 3: embodiment 1 or embodiment 2 described comprehensive protector of motor; its testing circuit can comprise: be enclosed within the inductance coil (L1) on the three-phase bus respectively; inductance coil (L2) and inductance coil (L3) are current transformer; each described current transformer corresponding respectively one group by electric capacity (Ci); resistance (Ri); the detection loop that diode (Di) and triode (Ti) are formed; a certain bus carried out current detecting; for example: by L1; D4; C6; R11; T3 forms an independent detection loop; A is detected mutually; the negative pole that the base stage of triode T3 meets diode D4 through resistance R 11 in this moment circuit connects the positive pole of electrochemical capacitor C6; diode D4 positive pole connects an end of inductance coil (L1); the C6 negative pole connects the other end and the emitter of inductance coil (L1); similarly; L2; D5; C7; R12; the electric circuit inspection B phase current that T4 forms; L3; D6; C8; R13; the electric circuit inspection C phase that T5 forms; the collector electrode short circuit of the emitter of triode (T3) and triode (T4); the collector electrode short circuit of the emitter of triode (T4) and triode (T5); the grounded emitter of triode (T5); the collector electrode of triode (T3) behind resistance (R10), connect DC power supply (+12V); the collector electrode of triode (T3) connects the in-phase input end of comparator in the open-phase protection circuit (IC1 4.) simultaneously; this end through diode (D3) connect DC power supply (+12V) simultaneously through electrochemical capacitor (C5) ground connection; C6 and D3; R10 plays the open phase protection time-lag action; at ordinary times; T3; T4; T5 is conducting; T3 collector electrode output LOW voltage; when single-phase or the three-phase phase failure; T3; T4; has a not conducting among the T5 at least; the T3 collector voltage raises; the output high level is delivered to open-phase protection circuit.
Connect anodal and electrochemical capacitor (C9) negative pole of diode (D7) respectively at the two ends of inductance coil (L3); cross-under electric capacity (R14), potentiometer (W2) and resistance (R15) back ground connection behind diode (D7) negative pole and the anodal short circuit of electrochemical capacitor (C9); potentiometer (W2) centre cap is taken over comparator (IC 1.) end of oppisite phase that carries in the protective circuit, and this end is through electrochemical capacitor (C3) ground connection.C3 plays the overload protection time-lag action; L3, D7, C9, R14, W2, R15 form the overload current testing circuit, and when single-phase or three-phase overload, the electric current among loop R14, W2, the R15 increases; W2 centre cap output voltage V 9 raises, and regulates the adjustable live stream set point of haveing suffered of W2.The three-phase current detection of this set is finished by three separate testing circuits respectively, and the operating current among instrument transformer L1, L2, the L3 is independent of each other mutually, therefore, detect and output accurately and reliably, antijamming capability is strong.
Embodiment 4: embodiment 1 or embodiment 2 or embodiment 3 described comprehensive protector of motor; its motor open-phase protection circuit comprises: the in-phase input end of comparator (IC1 4.) connects the collector electrode of the triode (T3) in the described testing circuit; the anti-phase voltage-stabiliser tube (DW2) that connects; simultaneously also through resistance (R9) connect DC power supply (+12V); the other end ground connection of voltage-stabiliser tube (DW2); at ordinary times; comparator (IC1 4.) in-phase end voltage is lower than end of oppisite phase voltage; comparator (IC1 4.) output is a low level; when comparator (IC1 4.) in-phase end voltage raises; when being higher than end of oppisite phase voltage; comparator (IC1 4.) output high jump is a high level; the output of comparator (IC1 4.) connects triode (T2) base stage behind resistance (R8) serial connection phase failure indicator light light-emitting diode (LED2); the grounded emitter of triode (T2); coil one end of its collector connecting relay (J1), another termination DC power supply of this coil (+12V).The normally-closed contact of J1 coil electricity is serially connected in the coil control circuit that exchanges contact, so exchange the contact outage, motor has a power failure, and realizes open phase protection.The advantage of doing like this is to adopt performance of integrated circuits stable, and open phase protection current value and protection delay time are stablized constant after mixing up, and circuit design is concise, and parameter is provided with rationally, and failure rate is low.
Embodiment 5: the above-mentioned described comprehensive protector of motor of each embodiment; its motor overload protective circuit comprises: potentiometer (W2) centre cap in the described testing circuit of comparator (IC1 1.) anti-phase termination; when bus current increases; this terminal voltage raises; resistance (R3) and resistance (R4) short circuit place in the in-phase end connecting resistance bleeder circuit; the other end ground connection of resistance (R4); another termination voltage-stabiliser tube (DW2) of resistance (R3); comparator (IC1 1.) end of oppisite phase voltage is lower than in-phase end voltage always at ordinary times; comparator (IC1 1.) output high level; when single-phase or heterogeneous overload; comparator (IC1 1.) end of oppisite phase voltage raises so that be higher than in-phase end voltage; make comparator (IC1 1.) upset; the output saltus step is a low level; comparator (IC1 1.) output short circuit comparator (IC1 2.) end of oppisite phase; comparator (IC1 2.) homophase termination voltage-stabiliser tube (DW2); to make its output be low level to comparator (IC1 2.) end of oppisite phase high level at ordinary times; comparator (IC1 1.) output is to make comparator (IC1 2.) end of oppisite phase also be low level after the low level; comparator (IC1 2.) upset; output is a high level; the output of comparator (IC1 2.) through resistance (R5) connect DC power supply (+12V); connect potentiometer (W1) end behind the series resistor (R6) simultaneously; be connected to comparator (IC1 3.) in-phase end behind the centre cap of potentiometer (W1) and the other end short circuit; and simultaneously through diode (D1) connect DC power supply (+12V) and through electrochemical capacitor (C4) ground connection; C4; W1; R6; D1 plays the overload protection time-lag action; regulate W1; adjustable haveing suffered carried the protection delay time; after comparator (IC1 2.) output is high level; comparator (IC1 3.) in-phase end voltage is raise; comparator after delaying time (IC1 3.) upset; the output high jump is a high level; the output of comparator (IC1 3.) connects the base stage of triode (T1) behind resistance (R7); the grounded emitter of triode (T1); succeed electrical equipment (J1) coil behind its collector electrode and triode (T2) the collector electrode short circuit; make the J1 coil electricity after the T1 conducting; by J1 contact action control motor power-failure protecting, connect behind comparator (IC1 1.) output series resistor (R2 9) and the indicator light (LED1) DC power supply (+12V).
The advantage of She Zhiing is like this: the integrated circuit of employing, and integrated degree height, stable performance, running parameter long-term stabilities such as the electric current of setting, time are constant, and circuit design is concise, and parameter is provided with rationally, and failure rate is low.
Embodiment 6: the above-mentioned described comprehensive protector of motor of each embodiment; described star-corner connection change-over circuit comprises: the diode from testing circuit (D7); electrochemical capacitor (C9); the end that a line connects potentiometer (W3) is drawn at the short circuit place of electric capacity (R14); the other end ground connection of potentiometer (W3); centre cap connects this star-angle (connection control circuit of △-Y); when bus current changes; the centre tapped voltage of W3 also changes; the centre cap of potentiometer (W3) connects comparator (IC2 4.) end of oppisite phase through resistance (R24); simultaneously through electrochemical capacitor (C10) ground connection; the in-phase end connecting resistance (R22) of comparator (IC2 4.) and the short circuit place of resistance (R23); the other end ground connection of resistance (R23); another termination voltage-stabiliser tube (DW3) negative pole of resistance (R22); be used for producing stable reference voltage level voltage-stabiliser tube (DW3) positive ending grounding negative terminal through resistance (R21) connect DC power supply (+12V); comparator (IC2 4.) output termination comparator (IC2 2.) end of oppisite phase; comparator (IC2 2.) homophase termination voltage-stabiliser tube (DW3) negative pole; its output connects triode (T7) through resistance (R18); triode (T7) collector connecting relay (J2) coil one end; another termination DC power supply of this coil (+12V); triode (T7) emitter connects the collector electrode of triode (T6); the grounded emitter of triode (T6); the base stage of triode (T6) connects comparator (IC2 1.) output through resistance (R25); comparator (IC2 is 1.) anti-phase termination voltage-stabiliser tube (DW3) negative pole, its in-phase end through diode (D8) connect DC power supply (+12V) simultaneously through electrochemical capacitor (C11) ground connection and through resistance (R16) connect DC power supply (+12V).
The electrical network powered on moment, R16, the time-delay of C11 and D8, anti-interference effect is risen slowly comparator (IC2 1.) in-phase end voltage, when being lower than DW3 voltage stabilizing value, comparator (IC2 1.) output low level, T6 ends, at this moment, give the J2 coil blackout after delay time, when comparator (IC2 1.) in-phase end voltage rises to above end of oppisite phase voltage, comparator (IC2 1.) upset, output is a high level, makes the T6 conducting, and therefore T6 is in conducting state always at ordinary times, when the electric current of measuring when the electric current mutual inductor surpasses the △ current setting value, comparator (IC2 4.) end of oppisite phase voltage raises, and until upset, makes output become low level, comparator (IC2 4.) is that output becomes high level after the low level with comparator (IC2 2.) output short circuit comparator (IC2 2.) end of oppisite phase, make the T7 conducting, give the J2 coil electricity, its contact action meets Y and exchanges the contact disconnection, △ connects and exchanges the contact connection, and motor is automatically converted to delta connection.
When bus current is lower than the Y current setting value, comparator (IC2 4.) end of oppisite phase voltage is lower than in-phase end, comparator (IC2 4.) output high level, making comparator (IC2 2.) output limit is low level, T7 ends, the J2 coil blackout, the contact action makes motor transfer the Y connection to, and adjusting W3 can adjust Y → △ and connect the conversion current setting value.
When bus current is between △ electric current and Y current setting value, do not change, reason is that comparator (IC2 4.) in-phase end connects diode D10 positive pole through resistance R 20, the D10 negative pole connects comparator (IC2 3.) output, this end meets DC power supply+12V through R19, the anti-phase termination DW3 homophase termination of comparator (IC2 3.) T7 collector electrode, when bus current increases, comparator (IC2 4.) reverse voltage raises, because comparator (IC2 3.), D10, R20, the effect of the circuit that R19 forms also increases the voltage of comparator (IC2 4.) in-phase end, but the amplitude that raises is lower than end of oppisite phase, the regulating circuit parameter, make and have only when bus current surpasses the △ current setting value, comparator (IC2 4.) end of oppisite phase could surpass in-phase end voltage, cause comparator (IC2 4.) upset, in like manner, have only when bus current is lower than the set point of Y electric current, comparator (IC2 4.) end of oppisite phase voltage just can be lower than in-phase end voltage, therefore, the T7 operating state is constant, the J2 coil is kept original on/off state, so motor keeps present Y or delta connection constant, regulates R20 and can change △ → Y current value.
This circuit advantage: adopt integrated circuit, integrated degree height, stable performance, each electric current of setting, time parameter are stablized constant, and circuit design is concise, parameter is provided with rationally, failure rate is low, and soft-start mode is adopted in Y-△ conversion, is provided with buffering area between the upper and lower limit electric current (△ electric current and Y electric current), under be limited to the Y current setting value, on be limited to the △ current setting value.Starting conversion has time-delay control, and transfer process is steadily carried out.And realize that band carries startup, conversion automatically.
Embodiment 7: the above-mentioned described comprehensive protector of motor of each embodiment; its bus circuit indicating circuit comprises: draw two leads from electrochemical capacitor (C6) two ends of testing circuit; series resistor (R28), potentiometer (W4) and electric current gauge outfit ; can directly read the bus current value from meter dial and pointer, the scale of ammeter can be regulated with potentiometer W4 as required.
Claims (7)
1. comprehensive protector of motor; its composition comprises: shell; be installed in the ammeter on the described shell; be installed in inductance coil and binding post and one group of work display lamp on the described shell; the Current Regulation button also is housed on described shell; Y-△ Current Regulation button and time adjusting knob; it is characterized in that: in described shell, circuit board is housed; comprise on the described circuit board: power circuit; the overload protecting circuit that links to each other with described power circuit; the motor open-phase protection circuit that links to each other with power circuit; the testing circuit that links to each other with power circuit; the star that links to each other with power circuit-corner connection change-over circuit; the bus circuit indicating circuit that links to each other with power circuit; described shell is split type up and down, and the joint that patches that connects circuit is housed respectively on the last lower body.
2. comprehensive protector of motor according to claim 1; it is characterized in that: described power circuit comprises: the power line of drawing from three-phase electricity; an input (～) that connects rectifier bridge through electrochemical capacitor (C1) wherein; another root connects another input (～) of rectifier bridge, the output of rectifier bridge " " be labeled as
And through resistance (R1) connect voltage-stabiliser tube (DW1) produce D.C. regulated power supply (+12V) give circuit supply, electric capacity (C2) is connected in parallel on the voltage-stabiliser tube (DW1), the input termination dc power anode of pressurizer (7806) (+12V), pressurizer " " ground connection, the output of pressurizer be dc voltage power supply (+6V), on described shell, be provided with " starting; stop; shaking control " change over switch, the common port of switch connects the base stage of triode (T8) through resistance (R26), the grounded emitter of triode (T8), collector connecting relay (J3) coil one end, another termination dc power anode of this coil (+12V), " startup " termination DC power supply of described change over switch (+6V) " stop " end unsettled, the output signal (D0) of " remote control " termination receiver of remote-control sytem, the power supply of receiver end on the one hand through diode (D11) connect pressurizer (7806) output head anode (+6V), connect the 3.6V storage battery utmost point through (D12) on the other hand, the utmost point of storage battery and circuit are connected to resistance (R27) between the utmost point of storage battery and the receiver utmost point altogether.
3. comprehensive protector of motor according to claim 1 and 2; it is characterized in that: described testing circuit comprises: be enclosed within the inductance coil (L1) on the three-phase bus respectively; inductance coil (L2) and inductance coil (L3) are current transformer; each described current transformer corresponding respectively one group by electric capacity (Ci); resistance (Ri); the detection loop that diode (Di) and triode (Ti) are formed; the collector electrode short circuit of the emitter of triode (T3) and triode (T4); the collector electrode short circuit of the emitter of triode (T4) and triode (T5); the grounded emitter of triode (T5); the collector electrode of triode (T3) through resistance (R10) connect DC power supply (+12V); the collector electrode of triode (T3) connects the in-phase input end of comparator in the open-phase protection circuit (IC1 4.) simultaneously; this end through diode (D3) connect DC power supply (+12V) simultaneously through electrochemical capacitor (C5) ground connection; connect anodal and electrochemical capacitor (C9) negative pole of diode (D7) respectively at the two ends of inductance coil (L3); cross-under electric capacity (R14) behind diode (D7) negative pole and the anodal short circuit of electrochemical capacitor (C9); potentiometer (W2) and resistance (R15) back ground connection; potentiometer (W2) centre cap is taken over comparator (IC 1.) end of oppisite phase that carries in the protective circuit, and this end is through electrochemical capacitor (C3) ground connection.
4. comprehensive protector of motor according to claim 1 and 2; it is characterized in that: described motor open-phase protection circuit comprises: the in-phase input end of comparator (IC1 4.) connects the collector electrode of the triode (T3) in the described testing circuit; the anti-phase voltage-stabiliser tube (DW2) that connects; simultaneously also through resistance (R9) connect DC power supply (+12V); the other end ground connection of voltage-stabiliser tube (DW2); the output of comparator (IC1 4.) connects triode (T2) base stage behind resistance (R8) serial connection phase failure indicator light light-emitting diode (LED2); the grounded emitter of triode (T2); coil one end of its collector connecting relay (J1), another termination DC power supply of this coil (+12V).
5. comprehensive protector of motor according to claim 1 and 2; it is characterized in that: described motor overload protective circuit comprises: potentiometer (W2) centre cap in the described testing circuit of comparator (IC1 1.) anti-phase termination; resistance (R3) and resistance (R4) short circuit place in the in-phase end connecting resistance bleeder circuit; the other end ground connection of resistance (R4); another termination voltage-stabiliser tube (DW2) of resistance (R3); comparator (IC1 1.) output short circuit comparator (IC1 2.) end of oppisite phase; comparator (IC1 2.) homophase termination voltage-stabiliser tube (DW2); the output of comparator (IC1 2.) through resistance (R5) connect DC power supply (+12V); connect potentiometer (W1) end behind the series resistor (R6) simultaneously; be connected to comparator (IC1 3.) in-phase end behind the centre cap of potentiometer (W1) and the other end short circuit; and simultaneously through diode (D1) connect DC power supply (+12V) and through electrochemical capacitor (C4) ground connection; the output of comparator (IC1 3.) connects the base stage of triode (T1) behind resistance (R7); the grounded emitter of triode (T1); succeed electrical equipment (J1) coil behind its collector electrode and triode (T2) the collector electrode short circuit, connect behind comparator (IC1 1.) output series resistor (R2 9) and the indicator light (LED1) DC power supply (+12V).
6. comprehensive protector of motor according to claim 1 and 2; it is characterized in that: described star-corner connection change-over circuit comprises: the diode from testing circuit (D7); electrochemical capacitor (C9); the end that a line connects potentiometer (W3) is drawn at the short circuit place of electric capacity (R14); the other end ground connection centre cap of potentiometer (W3) connects this star-angle (connection control circuit of △-Y); the centre cap of potentiometer (W3) connects comparator (IC2 4.) end of oppisite phase through resistance (R24); simultaneously through electric capacity (C10) ground connection; the in-phase end connecting resistance (R22) of comparator (IC2 4.) and the short circuit place of resistance (R23); the other end ground connection of resistance (R23); another termination voltage-stabiliser tube (DW3) of resistance (R22); voltage-stabiliser tube (DW3) end ground connection one end through resistance (R21) connect DC power supply (+12V); comparator (IC2 4.) output termination comparator (IC2 2.) end of oppisite phase; comparator (IC2 2.) homophase termination voltage-stabiliser tube (DW3); its output connects triode (T7) through resistance (R18); triode (T7) collector connecting relay (J2) coil one end; another termination DC power supply of this coil (+12V); triode (T7) emitter connects the collector electrode of triode (T6); the grounded emitter of triode (T6); the base stage of triode (T6) connects comparator (IC2 1.) output through resistance (R25); comparator (IC2 is 1.) anti-phase termination voltage-stabiliser tube (DW3), its in-phase end through diode (D8) connect DC power supply (+12V) simultaneously through electric capacity (C11) ground connection and through resistance (R16) connect DC power supply (+12V).
7. comprehensive protector of motor according to claim 1 and 2 is characterized in that: described bus circuit indicating circuit comprises: draw two leads from electrochemical capacitor (C6) two ends of testing circuit, series resistor (R28) potentiometer (W4) and electric current gauge outfit .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98216042 CN2364609Y (en) | 1998-06-24 | 1998-06-24 | Integrated protector for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98216042 CN2364609Y (en) | 1998-06-24 | 1998-06-24 | Integrated protector for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2364609Y true CN2364609Y (en) | 2000-02-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98216042 Expired - Fee Related CN2364609Y (en) | 1998-06-24 | 1998-06-24 | Integrated protector for motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2364609Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101197229B (en) * | 2007-10-20 | 2010-09-22 | 蔡甫寒 | Protection breaker of electric motor |
-
1998
- 1998-06-24 CN CN 98216042 patent/CN2364609Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101197229B (en) * | 2007-10-20 | 2010-09-22 | 蔡甫寒 | Protection breaker of electric motor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |