CN2179652Y - Automatic compensation protector for motor - Google Patents
Automatic compensation protector for motor Download PDFInfo
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- CN2179652Y CN2179652Y CN 93232788 CN93232788U CN2179652Y CN 2179652 Y CN2179652 Y CN 2179652Y CN 93232788 CN93232788 CN 93232788 CN 93232788 U CN93232788 U CN 93232788U CN 2179652 Y CN2179652 Y CN 2179652Y
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- 230000001012 protector Effects 0.000 title claims abstract description 8
- 238000005070 sampling Methods 0.000 claims description 10
- 101000629937 Homo sapiens Translocon-associated protein subunit alpha Proteins 0.000 claims description 9
- 101000629913 Homo sapiens Translocon-associated protein subunit beta Proteins 0.000 claims description 9
- 102100026231 Translocon-associated protein subunit alpha Human genes 0.000 claims description 9
- 102100026229 Translocon-associated protein subunit beta Human genes 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 5
- 239000003381 stabilizer Substances 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
The automatic compensation protector for motor is composed of start delay circuit, control circuit, executing circuit, overcurrent short-circuit protection, phase failure protection and voltage protection, and features simple start operation. The utility model discloses still have overcurrent, short circuit, open phase, multiple protect function such as excessive pressure and undervoltage.
Description
A kind of power supply motivation that relates to the utility model rises and employs automatic compensation controller, belongs to the electric machines control technology field.
At present, the compensator that middle and small motor starting is used utilizes manual operation mostly, promptly through manual type with the compensator input or cut out.This control mode has following deficiency: the one, and operating difficulties, non-senior electrician is difficult for grasping, and the 2nd, the starting time is wayward; long easy scaling loss compensator, too short then unfavorable to motor, the 3rd, though start-control device is arranged at present; but structure is comparatively complicated, is difficult for additional other defencive function.
This novel purpose provides a kind of improved electric motor starting compensation control protective device, and it can overcome the deficiency of existing starting compensator.
This novel purpose is achieved in that the characteristics of utilizing the electric motor starting time difference little, with the switching of a delay circuit control executive circuit, thus the automatic compensation of realization electric motor starting.
Basic circuit of the present utility model comprises startup delay circuit 1, control circuit 2, executive circuit 3.Described startup delay circuit 1 is made up of monostable circuit and RC delay circuit that 556 ic chips 5 are connected into, by 5 pin and the 9 pin output control signal of IC5.Described control circuit is made up of ic4 integrated package, solid-state relay SSR1 and SSR2, and 9 pin of IC4 connect the negative terminal of SSR1, SSR2 through diode D5, D6, and the latter's positive termination starts the control signal of delay circuit.By SSR1 and SSR2 difference control contactor C1 and C2.Described executive circuit is made up of the contact of compensator LA, LB, lc and control corresponding contactor, wherein, C1 is compensation contactor coil and contact thereof, C2 is work contactor coil and contact thereof, LA, LB, LC connect by star connection, three groups of normally opened contacts of C1 join tap O, P, Q and the motor M of LA, LB, LC respectively, after three groups of normally opened contacts series connection of the three groups of normally-closed contacts of C1 and C2 electric power loop and motor M are joined.
In order to provide protection to overcurrent or short trouble; the utility model also is added with an overcurrent short-circuit protection part; described protection part is made up of current sampling circuit 4 and short circuit over-current protection circuit 5; wherein; current sampling circuit is again by current transformer L1; L2; L3; rectifier D7; D8; D9 and corresponding RC filter network are formed; L1; L2; the primary coil of L3 seals in the electric power loop of motor M; the cathode output end of three groups of rectifiers connects together and meets potentiometer W1; flow short-circuit protective circuit 5 is taken in its output; the described flow short-circuit guarantor flesh さ plaited straw of crossing returns employing 556 time-base circuits formation; wherein; R12; be connected across between V+ and the ground after the C6 series connection; R13 is connected to 2 pin of I point and IC2; diode D10 is connected to I point and e point; R14 and R15; be connected across between V+ and the ground after the C7 series connection; j point and 6 pin join; R19 and R20; be connected across between V+ and the ground after the C9 series connection; K point and 8 pin join; 12 pin of IC2 are through R18 ground connection; and connect the e point of current sampling circuit 4 through R17 and D11; 5 of IC2; 9 pin are the m of connection control circuit respectively; the n point is through D1; connect input 12 pin of IC4 behind the D2.
In order to provide protection to open phase fault; the utility model also is added with an open phase protection part; described open phase protection partly comprises phase failure sample circuit 6 and phase failure instruction circuit 7; wherein; phase failure sample circuit is by seven diodes and resistance R 22; R23; W2 forms; diode D12; D13; D14; D15; D16; D17 presses three-phase bridge rectifier circuit and connects; D18; R22; R23; be connected across it after the W2 series connection+output and ground between; from T point output signal; phase failure instruction circuit 7 is made up of 556 time-base circuit IC3; wherein; resistance R 25; C11 series connection back is connected to 2 pin of IC3 through R26 at the α point; R27 and R28; be connected to 6 pin of IC3 after the C12 series connection at the β point, R point from 5 pin output phase failure command signal to control circuit 2.
In order to provide protection to overvoltage and under voltage; the utility model also is added with a voltage protection part; described voltage protection part is made up of voltage sample circuit 8 and voltage instruction circuit 9; wherein; voltage sample circuit 8 is by transformer B; rectification circuit D21; dropping resistor R1 and filter capacitor C1 form; its output is delivered to voltage instruction circuit 9 as voltage signal; two transport and placing devices of The latter are connected into the voltage comparison amplifier; wherein; R6; provide after the R7 series connection brownout signal to IC1-2+end; R9; provide the end of overvoltage signal after the R10 series connection to IC1-1; R8 with provide the common port of reference voltage after voltage-stabiliser tube D22 connects to IC1-1 and IC2-2; its output is through luminous tube D23; D24 is with the S end that is connected to control circuit, and R11 is a protective resistance.
The utility model since utilize a delay circuit to go to control monostable circuit conversion and and then the switching of control compensation device, thereby overcome the randomness of manual switching,, can finish the start-up course of motor as long as operating personnel press button No. one time, simple to operate, be easy to grasp.And the utility model has designed a control circuit between startup delay circuit and executive circuit, is easy to additional other function.Just because of this, the utility model is to the motor various common faults that occur in service, as the phase failure, overcurrent, short circuit, overvoltage, under-voltage etc. all designed corresponding protection circuit, can reach the purpose of electric motor protecting effectively.Used device in the circuit is also mostly selected common model for use, is easy to make, and cost is also lower.
The utility model is described in further detail below in conjunction with accompanying drawing:
Fig. 1 is the utility model theory diagram;
Fig. 2 is automatic compensated part electrical schematic diagram;
Fig. 3 is an overcurrent short-circuit protection part electrical schematic diagram;
Fig. 4 is an open phase protection part electrical schematic diagram;
Fig. 5 is a voltage protection part electrical schematic diagram.
Be used for the primary signal that control compensation device input cuts out in the utility model, come the self-starting delay circuit.Start the IC5 in the delay circuit, adopt 556 o'clock base integrated packages, be connected into monostable circuit, the high level of 5 pin output removes to open the solid-state relay SSR1 in the control circuit when utilizing its transient state, then gets back to stable state, by 5 pin output low levels.The right half part of IC5 is controlled by the left side, and operating state is opposite with the left side.When 5 pin were low level, 9 pin were high level, were delivered to the y end of control circuit, opened another solid-state relay SSR2, and and then the control motor change normal operating conditions automatically over to by starting state.
Compensate the length of start-up time, depend on the delay circuit that W3 and C15 constitute.Regulate W3, can give and put The optimal compensation start-up time.
IC4 in the control circuit 2 still utilizes 1/2556 integrated package, and its input 12 pin and 8 pin are accepted the instruction from each instruction circuit.Each instruction is normal when being high level 1, and corresponding 9 pin are output as 0.If have one then to be the fault shutdown command for low level 0 in each instruction, this moment, 9 pin were 1.SSR1 and SSR2 are the solid-state relay of two same model.X, y that its positive input terminal is started respectively in the delay circuit hold control, and two negative input ends are received on 9 pin of IC4 through D5, D6.Therefore, the shutoff of SSR1, SSR2 and conducting all are subjected to the control of each instruction circuit, and they have controlled adhesive and the release of A.C. contactor C1, C2 respectively, and respectively organize the running status that motor is directly controlled in the contact by it.
LA in the executive circuit 3, LB, LC are that three electric motor startings are with compensator (coil), by the star connection connection.C1 is for starting often opening or normally-closed contact of compensation A.C. contactor among the figure, and C2 is often opening or normally-closed contact of operate as normal A.C. contactor.During startup, the C1 adhesive, with the compensator place in circuit, just often, and the C2 adhesive, C1 disconnects, and compensator is cut out the direct energized of motor.
The original control signal of overcurrent short-circuit protection part is from current sampling circuit 4.L1 among Fig. 3, L2, L3 are three current transformers, obtain current signal from the ABC three phase mains respectively, are converted into d. c. voltage signal behind bridge rectifier, and the height of this voltage signal has reflected the size of each phase current of motor.This signal is taken out from e point and a, b, c each point,, sent into flow short-circuit and open phase protection two parts circuit respectively to control its operating state as the two-way sampled signal.
IC2 in the short circuit over-current protection circuit 5 adopts 556 o'clock base integrated packages, and left-half constitutes the overcurrent delay circuit, and right half part constitutes the short circuit change-over circuit.Its operation principle is: 2,6 pin of IC2, and in the moment that powers up, because the effect of C6 and C7 is 0 level, 5 pin are output as 1 level, and in like manner, the output of 9 pin also is 1.1 signal of this 5,9 pin then is the order of start operation, delivers to 12 pin of IC4 respectively, and the control motor is worked according to program.After powering up, 6 pin of IC2 are 1 level very soon, and 2 pin can not be 1 at once, but maintain 0 state owing to the effect (capacity is 200 μ) of C6.So the output of 5 pin also maintains 1 state, sends the instruction of normal operation to control circuit.When there is over current fault in motor, the distinguishing signal Ue that then sends into 2 pin increases, and the charging voltage of C6 also raises, and reaches Ue+0.7V, if surpass the threshold voltage of 2 pin, then 5 pin are output as 0, and this stops face 0 signal and delivers to control circuit, turn-offs motor M.
In like manner, when no short trouble, 9 pin outputs also are maintained 1, and when having short trouble, Ue will raise, and voltage-stabiliser tube D11 punctures, and making 12 pin is that 1,9 pin is output as 0, sends halt instruction to control circuit.
R12, C6 constitute a delay circuit, and this circuit mainly is to be short trouble because of big electric current erroneous judgement when preventing motor start-up.The time constant of R12, C6 should be greater than start-up time.The effect of W1 is a critical voltage value of setting up signal.
For the ease of the setting of observation critical voltage value, also be provided with a light indicating circuit during this is novel.This circuit constitutes by being transported into piece IC1-3, IC1-4 and D25, IC1-3 and IC1-4 are connected into comparison amplifier (adopting LM324), R30, R31, R32 are concatenated into bleeder circuit, obtain voltage U g and Uf respectively at g, f point, when Uf＜Ue＜Ug, luminous tube D25 is bright, and Ug is too high or too low, all can not make D25 luminous.When motor normally moves, adjust W1 and make D25 luminous, then Ci Shi Ue is above-mentioned critical voltage value.
Phase failure sample circuit 6 is shown among Fig. 4, and negative terminal a, b, c from three sampling voltages of current sampling circuit 4 obtain three magnitude of voltage Ua, Ub, Uc respectively.When the three phase mains balance, three-phase current is balance also, Ua=Ub=Uc, and a, b, 3 potential differences of c are 0.If the three phase mains phase shortage, as lacking the A phase, this electric current will produce a voltage U t on R2 with electric current shown in the overcurrent arrow this moment, and three-phase voltage is uneven, and then Ut is big more.Ut is sent in the phase failure instruction circuit 7, and the latter will send the open phase protection instruction.
IC3 in the phase failure instruction circuit 7 is a bistable circuit.Starting shooting moment, two inputs, 2,6 pin are 0, and output 5 pin are 1.This 1 signal is sent into the R end in the control circuit 2, the instruction control circuit operate as normal, after powering up, 6 pin of IC3 be very soon 1,2 pin then because the D20 conducting is always 0, make 5 pin keep a kind of stable state 1, instruction circuit keeps operate as normal.When phase shortage, Ut is added to the D20 negative pole, makes D20 instead end partially, and C11 is 1 because of charging, and then 5 pin become 0, and this 0 signal is phase failure instruction, sends into control circuit, and motor is turn-offed.Motor closes has no progeny, and the three-phase sampled signal is 0, Ut=0, the D20 conducting, 2 pin are again 0, the IC3 bistable circuit remains on 0 state, have only three phase mains normal after, start again, motor is operate as normal again.
The primary signal of voltage protection part is from voltage sample circuit 8; B among Fig. 5 is the power transformer of this device; its elementary main power source of directly taking from; after the secondary step-down rectifier filtering; obtain a direct current voltage; because without voltage stabilizing, so this voltage changes with line voltage, UEF is promptly as sampling voltage.
A.C. contactor in the utility model can be selected according to controlled power of electric motor.The optional commercially available prod of compensator, the optional silicon rectifier diode of each diode.The motor of making by this New Scheme compensates protector automatically applicable to all kinds of middle and small motors.
Claims (4)
1; a kind of motor compensates protector automatically; it is made up of compensator and circuit control part branch; it is characterized in that; the circuit control section comprises startup delay circuit 1; control circuit 2 and executive circuit 3; described startup delay circuit 1 is made up of monostable circuit and RC delay circuit that the IC5 integrated package is connected into; 5 pin and 9 pin output control signal by IC5; described control circuit 2 is by the IC4 integrated package; solid-state relay SSR1 and SSR2 form; 9 pin of IC4 are through diode D5; D6 meets SSR1 respectively; the negative terminal of SSR2; the latter's positive termination starts the control signal x of delay circuit; y; by SSR1 and SSR2 difference control contactor C1 and C2; described executive circuit is by compensator LA; LB; the contact of LC and control corresponding contactor is formed; wherein; LA; LB; LC connects by star connection; three groups of normally opened contacts of C1 are respectively with LA; LB; an end and the electric power loop of LC join; three groups of normally-closed contacts of C2 are respectively with LA; LB; the tap O of LC; P; Q and motor M are joined, and after three groups of normally opened contacts series connection of the three groups of normally-closed contacts of C1 and C1 electric power loop and motor M are joined.
2; motor according to claim 1 compensates protector automatically; it is characterized in that; it also is added with an overcurrent short-circuit protection part; described protection part is made up of current sampling circuit 4 and short circuit over-current protection circuit 5; wherein; current sampling circuit is again by current transformer; rectifier D7; D8; D9 and corresponding filter network are formed; L1; L2; the primary coil of L3 seals in the electric power loop of motor M; the cathode output end of three groups of rectifiers connects together and meets potentiometer W1; the short protective circuit 5 of stream is taken in its output; described short circuit over-current protection circuit 5 adopts 556 time-base circuits to constitute; wherein; R12; be connected across between V+ and the ground after the C6 series connection; R13 is connected to 2 pin of I point and IC2; diode D10 is connected to I and e point; R14 and R15; be connected across between V+ and the ground after the C7 series connection; j point and 6 pin join; R19 and R20; be connected across between V+ and the ground after the C9 series connection; K point and 8 pin join; 12 pin of IC2 are through R18 ground connection; and connect the e point of current sampling circuit 4,5 of IC2 through R17 and D11; 9 pin are the m of connection control circuit respectively; the n point is through D1; connect input 12 pin of IC4 behind the D2.
3; protector according to claim 2; it is characterized in that; it also is added with an open phase protection part; described open phase protection partly comprises phase failure sample circuit 6 and phase failure instruction circuit 7; wherein; phase failure sample circuit is by seven diodes and resistance R 22; R23; W2 forms; diode D12; D13; D14; D15; D16; D17 presses three-phase bridge rectifier circuit and connects; D18; R22; R23; be connected across it after the W2 series connection+output and ground between; from T point output signal; phase failure instruction circuit 7 is made up of 556 time-base circuit IC3; wherein; resistance R 25; C11 series connection back is connected to 2 pin of IC3, R27 and R28 at the α point through R26; be connected to 6 pin of IC3 after the C12 series connection at the β point, R point from 5 pin output phase failure command signal to control circuit 2.
4; protector according to claim 3; it is characterized in that; it also is added with a voltage protection part; described voltage protection part is made up of voltage sample circuit 8 and voltage instruction circuit 9; wherein; voltage sample circuit 8 is by transformer B; rectification circuit D21; dropping resistor R1 and filter capacitor C1 form; its output is delivered to voltage instruction circuit 9 as voltage signal; two transport and placing devices of The latter are connected into the voltage comparison amplifier; wherein; R6; provide after the R7 series connection brownout signal to IC1-2+end; R9; provide the end of overvoltage signal after the R10 series connection to IC1-1; R8 with provide the common port of reference voltage after voltage-stabiliser tube D22 connects to IC1-1 and IC1-2, its output is through luminous tube D23; D24 is with the S end that is connected to control circuit, and R11 is a protective resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93232788 CN2179652Y (en) | 1993-12-21 | 1993-12-21 | Automatic compensation protector for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93232788 CN2179652Y (en) | 1993-12-21 | 1993-12-21 | Automatic compensation protector for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2179652Y true CN2179652Y (en) | 1994-10-12 |
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ID=33808909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93232788 Expired - Fee Related CN2179652Y (en) | 1993-12-21 | 1993-12-21 | Automatic compensation protector for motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2179652Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100477436C (en) * | 2001-10-12 | 2009-04-08 | 余彦中 | Phase fault, low-voltage and over voltage breaking protection circuit |
| CN106089777A (en) * | 2016-06-01 | 2016-11-09 | 广东美的环境电器制造有限公司 | The control method of system of shaking the head, device, system, fan and warm-air drier |
-
1993
- 1993-12-21 CN CN 93232788 patent/CN2179652Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100477436C (en) * | 2001-10-12 | 2009-04-08 | 余彦中 | Phase fault, low-voltage and over voltage breaking protection circuit |
| CN106089777A (en) * | 2016-06-01 | 2016-11-09 | 广东美的环境电器制造有限公司 | The control method of system of shaking the head, device, system, fan and warm-air drier |
| CN106089777B (en) * | 2016-06-01 | 2019-06-25 | 广东美的环境电器制造有限公司 | Control method, device, system, fan and the warm-air drier for system of shaking the head |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |