CN202872701U - Control device for three-phase alternating-current motors - Google Patents
Control device for three-phase alternating-current motors Download PDFInfo
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- CN202872701U CN202872701U CN 201220515536 CN201220515536U CN202872701U CN 202872701 U CN202872701 U CN 202872701U CN 201220515536 CN201220515536 CN 201220515536 CN 201220515536 U CN201220515536 U CN 201220515536U CN 202872701 U CN202872701 U CN 202872701U
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Abstract
The utility model discloses a control device for three-phase alternating-current motors. The control device comprises a current detection module, a reactor L, a first switch module, a second switch module and a control module, wherein three input ends of the first switch module are respectively connected with A phase, B phase and C phase of a three-phase alternating-current power supply, three output ends of the first switch module are respectively connected with three input ends of the reactor L through the current detection module, three output ends of the reactor L are respectively connected with three winding terminals of a three-phase alternating-current motor, three input ends of the second switch module are respectively connected with the three input ends of the reactor L, three output ends of the second switch module are respectively connected with the three output ends of the reactor L, and the current detection module, the first switch module and the second switch module are respectively connected with the control module. With the control device for three-phase alternating-current motors, the starting current of a three-phase alternating-current motor with heavy load can be reduced, and the normal startup of the three-phase alternating-current motor with heavy load can be ensured.
Description
Technical field
The utility model relates to the electrical control field, relates in particular to a kind of three-phase alternating-current motor control device.
Background technology
When the three-phase alternating-current motor (such as large centrifugal water pump, centrifugal blower, forcing press, conveying and dragging motor etc.) that existing three-phase alternating-current motor control device control overhead is larger starts, the starting current of three-phase alternating-current motor is excessive, thereby cause that the transmission line voltage drop is excessive, cause the three phase alternating current motor starting difficulty.
China Patent Publication No. 200994115, open day on December 19th, 2007, the name of utility model is called the energy-conservation of electric motor controls, this application case discloses a kind of the energy-conservation of electric motor controls, it comprises central processing unit, switch element and three-phase alternating current main circuit, described three-phase alternating current main circuit is connected with motor by switch element, described central processing unit is connected with switch element, be provided with transducer on described three-phase alternating current main circuit and the electric wire that motor is connected, described transducer is connected with central processing unit.Its weak point is that when the three-phase alternating-current motor that this device control overhead is larger started, the starting current of three-phase alternating-current motor was excessive, thereby causes that the transmission line voltage drop is excessive, causes the three phase alternating current motor starting difficulty.
The utility model content
The purpose of this utility model is that electric current is excessive when overcoming the larger three-phase alternating-current motor of load and starting, thereby cause that the transmission line voltage drop is excessive, the technical problem that causes the three phase alternating current motor starting difficulty, a kind of three-phase alternating-current motor control device is provided, it can reduce the starting current of the larger three-phase alternating-current motor of load, guarantees that the larger three-phase alternating-current motor of load normally starts.
In order to address the above problem, the utility model is achieved by the following technical solutions:
A kind of three-phase alternating-current motor control device of the present utility model, comprise current detection module, reactor L, the first switch module, second switch module and control module, three inputs of described the first switch module respectively with the A phase of three-phase alternating-current supply, the B phase links to each other with C, three outputs of the first switch module link to each other with three inputs of reactor L by current detection module respectively, three outputs of reactor L link to each other with three winding terminals of three-phase alternating-current motor respectively, three inputs of described second switch module link to each other with three inputs of reactor L respectively, three outputs of second switch module link to each other the signal output part of current detection module with three outputs of reactor L respectively, the control end of the control end of the first switch module and second switch module links to each other with control module respectively.
In the technical program, control the energising of the first switch module by control module, the three-phase alternating-current motor energising starts.In start-up course, the three-phase alternating-current motor rotating speed accelerates, and electric current is larger in the circuit, and current detection module detects large electric current, sends triggering signal to control module.Control module control second switch module disconnects, and second opens a module does not have electric current to pass through, and at this moment, reactor L plays hindrance function, reduces the starting current of three-phase alternating-current motor, prevents that the transmission line voltage drop is excessive, guarantees that three-phase alternating-current motor normally starts.When the three-phase alternating-current motor rotating speed enters at the uniform velocity state, current reduction is to stable state, current detection module sends triggering signal to control module, control module control second switch module is connected, the second switch module has electric current to pass through, the output current of three-phase alternating-current supply flows to three-phase alternating-current motor through the second switch module, and reactor L quits work, the three-phase alternating-current motor normal operation.
As preferably, described current detection module comprises current transformer TA1, current transformer TA2 and current relay KL, the A phase output current of three-phase alternating-current supply and C mutually output current pass respectively the iron core of the iron core summation current transformer TA2 of current transformer TA1, the coil one end ground connection of current transformer TA1, the other end links to each other with the first coil one end of current relay KL, the first coil other end of current relay KL links to each other with the second coil one end and tertiary coil one end thereof of current relay KL respectively, the second coil other end of current relay KL links to each other with current transformer TA2 one end, the tertiary coil other end summation current transformer TA2 other end of current relay KL is ground connection all, and the normally-closed contact of current relay KL links to each other with control module.
When the operating current of three-phase alternating-current motor was excessive, the electric current by current relay KL coil surpassed set point, and the normally-closed contact of current relay KL disconnects, and sent start pulse signal to control module.Control module receives start pulse signal, and control second switch module disconnects.
As preferably, described control module comprises start button ST, stop button STP, A.C. contactor KM and A.C. contactor KMY, described the first switch module is by the first normally opened contact of A.C. contactor KM, the second normally opened contact and the 3rd normally opened contact form, described second switch module is by the first normally opened contact of A.C. contactor KMY, the second normally opened contact and the 3rd normally opened contact form, the series circuit that the 4th normally opened contact of A.C. contactor KM and the coil of A.C. contactor KM form and the normally-closed contact of current relay KL, 5 constant virtues of A.C. contactor KM is left the series circuit that the coil of contact and A.C. contactor KMY forms and is unified into a parallel circuits, this parallel circuits and stop button STP and single phase alternating current power supply are connected into one and start control loop, and start button ST is in parallel with the 4th normally opened contact of A.C. contactor KM.
Press start button ST, the coil electricity of A.C. contactor KM, the closing of contact is left in the first normally opened contact of A.C. contactor KM, the second normally opened contact, the 3rd normally opened contact, the 4th normally opened contact and 5 constant virtues, and the three-phase alternating-current motor energising is started working.A.C. contactor KMY energising, the first normally opened contact of A.C. contactor KMY, the second normally opened contact and the 3rd normally opened contact are closed.Because electric current is excessive when starting, the normally-closed contact of current relay KL disconnects, the coil blackout of A.C. contactor KMY, and the first normally opened contact of A.C. contactor KMY, the second normally opened contact and the 3rd normally opened contact disconnect.Press stop button STP, the first normally opened contact of A.C. contactor KM, the second normally opened contact and the 3rd normally opened contact disconnect, and three-phase alternating-current motor quits work.
As preferably, described a kind of three-phase alternating-current motor control device also comprises the overload detection module, the overload detection module comprises current transformer TA3, current transformer TA4 and current relay KGL, described control module also comprises time relay KT, the A phase output current of three-phase alternating-current supply and C mutually output current pass respectively the iron core of the iron core summation current transformer TA4 of current transformer TA3, current transformer TA3 one end ground connection, the other end links to each other with coil one end summation current transformer TA4 one end of current relay KGL respectively, the coil other end summation current transformer TA4 other end ground connection of current relay KGL, the normally opened contact of current relay KGL, the coil of time relay KT and single phase alternating current power supply are connected into a loop, and the normally-closed contact of time relay KT is serially connected with in the described startup control loop.
When three-phase alternating-current motor transshipped, the three-phase alternating-current motor operating current was excessive, and the electric current by current relay KGL coil surpasses set point, and the normally opened contact of current relay KGL is closed, the coil electricity of time relay KT.The normally-closed contact of time relay KT disconnects through behind the setting-up time, A.C. contactor KM outage, the first normally opened contact of A.C. contactor KM, the second normally opened contact and the 3rd normally opened contact disconnect, and three-phase alternating-current motor quits work, and prevent that three-phase alternating-current motor from damaging.
As preferably, described a kind of three-phase alternating-current motor control device also comprises voltage detection module, voltage detection module comprises voltage transformer TV, voltage relay KY1, voltage relay KY2 and voltage relay KY3, described control module also comprises signal relay KX1 and indicator light H1, three inputs of voltage transformer TV primary coil respectively with the A phase of three-phase alternating-current supply, the B phase links to each other with C, the coil two ends of voltage relay KY1 link to each other with the B phase output terminal with the A phase output terminal of voltage transformer TV secondary coil respectively, the coil two ends of voltage relay KY2 link to each other with the C phase output terminal with the B phase output terminal of voltage transformer TV secondary coil respectively, the coil two ends of voltage relay KY3 link to each other with the C phase output terminal with the A phase output terminal of voltage transformer TV secondary coil respectively, single phase alternating current power supply, the coil of signal relay KX1, the normally opened contact of voltage relay KY1 and normally-closed contact thereof are connected into a loop, the normally opened contact of the normally opened contact of voltage relay KY2 and voltage relay KY3 is in parallel with the normally opened contact of voltage relay KY1 respectively, the normally-closed contact of the normally-closed contact of voltage relay KY2 and voltage relay KY3 is in parallel with the normally-closed contact of voltage relay KY1 respectively, the normally opened contact of signal relay KX1, indicator light H1 and single phase alternating current power supply are connected into a loop.
In the three-phase alternating-current motor running, when the A of three-phase alternating-current supply phase, B phase and C any one disconnected mutually or during phase shortage mutually in mutually, voltage on voltage relay KY1, voltage relay KY2 or the voltage relay KY3 surpasses the set point action, signal relay KX1 coil electricity, the normally opened contact of signal relay KX1 is closed.Indicator light H1 energising is lighted, and reminds staff's three-phase alternating-current motor to be in mutually disconnected or open-phase running status, need carry out emergency treatment.
As preferably, described voltage detection module also comprises voltage relay KY4, described control module also comprises signal relay KX2 and indicator light H2, the coil two ends of voltage relay KY4 link to each other with the C phase output terminal with the A phase output terminal of voltage transformer TV secondary coil respectively, the coil of the normally opened contact of voltage relay KY4, signal relay KX2 and single phase alternating current power supply are connected into a loop, and the normally opened contact of signal relay KX2, indicator light H2 and single phase alternating current power supply are connected into a loop.
In the three-phase alternating-current motor running, when the A of three-phase alternating-current supply phase, B phase and C mutually in any one when low-voltage occurring mutually, voltage on the coil of voltage relay KY4 is lower than set point, and the normally opened contact of voltage relay KY4 is closed, and the normally opened contact of signal relay KX2 is closed.Indicator light H2 energising is lighted, and reminds staff's three-phase alternating-current motor to be in the subnormal voltage operation state, need carry out emergency treatment.
As preferably, described a kind of three-phase alternating-current motor control device also comprises the detection of electrical leakage module, the detection of electrical leakage module comprises current transformer TA5 and residual current relay KN, described control module comprises signal relay KX3 and indicator light H3, the A phase output current of three-phase alternating-current supply, B phase output current and C mutually output current pass the iron core of current transformer TA5, the coil of the coil of current transformer TA5 and residual current relay KN is connected into a loop, the normally opened contact of residual current relay KN, the coil of signal relay KX3 and single phase alternating current power supply are connected into a loop, the normally opened contact of signal relay KX3, indicator light H3 and single phase alternating current power supply are connected into a loop.
In the three-phase alternating-current motor running, when the A of three-phase alternating-current supply phase, B phase and C any one electric leakage occurs in mutually mutually, when producing zero-sequence current, the induced current that current transformer TA5 produces is non-vanishing, the coil electricity of residual current relay KN, the normally opened contact of residual current relay KN is closed, and the normally opened contact of signal relay KX3 is closed.Indicator light H3 energising is lighted, and reminds staff's three-phase alternating-current motor to be in the electric leakage running status, need carry out emergency treatment.
The beneficial effects of the utility model are: (1) can reduce the starting current of the larger three-phase alternating-current motor of load, guarantees that the larger three-phase alternating-current motor of load normally starts.(2) when three-phase alternating-current motor transships, control module control three-phase alternating-current motor quits work, and prevents that three-phase alternating-current motor from damaging.(3) in the three-phase alternating-current motor running, when the A of three-phase alternating-current supply phase, B phase and C mutually in any one mutually disconnected mutually or during phase shortage, indicator light H1 energising is lighted, and reminds staff's three-phase alternating-current motor to be in mutually disconnected or open-phase running status.(4) in the three-phase alternating-current motor running, when the A of three-phase alternating-current supply phase, B phase and C mutually in any one when low-voltage occurring mutually, indicator light H2 energising is lighted, and reminds staff's three-phase alternating-current motor to be in the subnormal voltage operation state.(5) in the three-phase alternating-current motor running, when the A of three-phase alternating-current supply phase, B phase and C any one electric leakage occurs in mutually mutually, indicator light H3 energising is lighted, and reminds staff's three-phase alternating-current motor to be in the electric leakage running status.
Description of drawings
Fig. 1 is that a kind of circuit theory of the present utility model connects block diagram;
Fig. 2 is the circuit theory diagrams of three-phase alternating-current motor operating circuit of the present utility model;
Fig. 3 is the circuit theory diagrams of current detection module of the present utility model;
Fig. 4 is the circuit theory diagrams of overload detection module of the present utility model;
Fig. 5 is the circuit theory diagrams of detection of electrical leakage module of the present utility model;
Fig. 6 is the circuit theory diagrams of control module of the present utility model.
Among the figure: 1, current detection module, the 2, first switch module, 3, the second switch module, 4, control module, 5, three-phase alternating-current supply, 6, single phase alternating current power supply, 7, the overload detection module, 8, voltage detection module, 9, the detection of electrical leakage module, 10, three-phase alternating-current motor.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: a kind of three-phase alternating-current motor control device of the present embodiment, as shown in Figure 1, comprise current detection module 1, reactor L, the first switch module 2, second switch module 3, control module 4, overload detection module 7, voltage detection module 8 and detection of electrical leakage module 9, three inputs of the first switch module 2 are respectively by the A phase of voltage detection module 8 with three-phase alternating-current supply 5, the B phase links to each other with C, three outputs of the first switch module 2 link to each other with three inputs of reactor L with overload detection module 7 by current detection module 1 respectively, three outputs of reactor L link to each other with three winding terminals of three-phase alternating-current motor 10 by detection of electrical leakage module 9 respectively, three inputs of second switch module 3 link to each other with three inputs of reactor L respectively, three outputs of second switch module 3 link to each other with three outputs of reactor L respectively, control module 4 respectively with current detection module 1, the first switch module 2, second switch module 3, single phase alternating current power supply 6, overload detection module 7, voltage detection module 8 links to each other with detection of electrical leakage module 9.
As shown in Figure 2, voltage detection module 8 comprises voltage transformer TV, voltage relay KY1, voltage relay KY2, voltage relay KY3 and voltage relay KY4, the first switch module 2 is comprised of the first normally opened contact, the second normally opened contact and the 3rd normally opened contact of A.C. contactor KM, second switch module 3 is comprised of the first normally opened contact, the second normally opened contact and the 3rd normally opened contact of A.C. contactor KMY, and the three-phase alternating-current motor control device also comprises isolating switch QS.Three fixed contacts of isolating switch QS link to each other with C with A phase, the B phase of three-phase alternating-current supply 5 respectively, three moving contacts of isolating switch QS link to each other with the first normally opened contact one end, the second normally opened contact one end and the 3rd normally opened contact one end of A.C. contactor KM respectively, the first normally opened contact other end of A.C. contactor KM, the second normally opened contact other end and the 3rd normally opened contact other end link to each other with three inputs of reactor L respectively, and three outputs of reactor L link to each other with three winding terminals of three-phase alternating-current motor 10 respectively.The first normally opened contact one end of A.C. contactor KMY, the second normally opened contact one end and the 3rd normally opened contact one end link to each other with three inputs of reactor L respectively, and the first normally opened contact other end of A.C. contactor KMY, the second normally opened contact other end and the 3rd normally opened contact other end link to each other with three outputs of reactor L respectively.
Three inputs of voltage transformer TV primary coil link to each other with three moving contacts of isolating switch QS respectively.The coil two ends of voltage relay KY1 link to each other with the B phase output terminal with the A phase output terminal of voltage transformer TV secondary coil respectively, the coil two ends of voltage relay KY2 link to each other with the C phase output terminal with the B phase output terminal of voltage transformer TV secondary coil respectively, the coil two ends of voltage relay KY3 link to each other with the C phase output terminal with the A phase output terminal of voltage transformer TV secondary coil respectively, the coils from parallel connection of coils of the coil of voltage relay KY4 and voltage relay KY3.
As shown in Figure 3, current detection module 1 comprises current transformer TA1, current transformer TA2 and current relay KL, the A phase output current of three-phase alternating-current supply 5 and C mutually output current pass respectively the iron core of the iron core summation current transformer TA2 of current transformer TA1, the coil one end ground connection of current transformer TA1, the other end links to each other with the first coil one end of current relay KL, the first coil other end of current relay KL links to each other with the second coil one end and tertiary coil one end thereof of current relay KL respectively, the second coil other end of current relay KL links to each other with current transformer TA2 one end, and the tertiary coil other end summation current transformer TA2 other end of current relay KL is ground connection all.
As shown in Figure 4, overload detection module 7 comprises current transformer TA3, current transformer TA4 and current relay KGL, the A phase output current of three-phase alternating-current supply 5 and C mutually output current pass respectively the iron core of the iron core summation current transformer TA4 of current transformer TA3, current transformer TA3 one end ground connection, the other end links to each other with coil one end summation current transformer TA4 one end of current relay KGL respectively, the coil other end summation current transformer TA4 other end ground connection of current relay KGL.
As shown in Figure 5, leakance electro-detection module 9 comprises current transformer TA5 and residual current relay KN, the A phase output current of three-phase alternating-current supply 5, B phase output current and C mutually output current pass the iron core of current transformer TA5, and the coil of the coil of current transformer TA5 and residual current relay KN is connected into a loop.
As shown in Figure 6, control module 4 comprises mains switch SA, start button ST, stop button STP, A.C. contactor KM, A.C. contactor KMY, time relay KT, signal relay KX1, signal relay KX2, signal relay KX3, indicator light RD, indicator light HLRD, indicator light HLGN, indicator light H1, indicator light H2, indicator light H3 and electric bell HA.
The series circuit that the 4th normally opened contact of A.C. contactor KM and the coil of A.C. contactor KM form and the normally-closed contact of current relay KL, 5 constant virtues of A.C. contactor KM is left the series circuit that the coil of contact and A.C. contactor KMY forms and is unified into a parallel circuits, this parallel circuits and stop button STP, the normally-closed contact of time relay KT, mains switch SA and single phase alternating current power supply 6 are connected into a loop, the series circuit that the 6th normally opened contact of A.C. contactor KM and indicator light RD form is in parallel with this parallel circuits, the series circuit that the 4th normally opened contact of A.C. contactor KMY and indicator light HLRD form is in parallel with this parallel circuits, and start button ST is in parallel with the 4th normally opened contact of A.C. contactor KM.The normally-closed contact of A.C. contactor KM, indicator light HLGN, mains switch SA and single phase alternating current power supply 6 are connected into a loop.
The coil of the normally opened contact of current relay KGL, time relay KT, mains switch SA and single phase alternating current power supply 6 are connected into a loop.
The coil of single phase alternating current power supply 6, mains switch SA, signal relay KX1, the normally opened contact of voltage relay KY1 and normally-closed contact thereof are connected into a loop, the normally opened contact of the normally opened contact of voltage relay KY2 and voltage relay KY3 is in parallel with the normally opened contact of voltage relay KY1 respectively, and the normally-closed contact of the normally-closed contact of voltage relay KY2 and voltage relay KY3 is in parallel with the normally-closed contact of voltage relay KY1 respectively.The first normally opened contact of signal relay KX1, indicator light H1, mains switch SA and single phase alternating current power supply 6 are connected into a loop, and the second normally opened contact of signal relay KX1, electric bell HA, mains switch SA and single phase alternating current power supply 6 are connected into a loop.
The coil of the normally opened contact of voltage relay KY4, signal relay KX2, mains switch SA and single phase alternating current power supply 6 are connected into a loop.The first normally opened contact of signal relay KX2, indicator light H2, mains switch SA and single phase alternating current power supply 6 are connected into a loop.The second normally opened contact of signal relay KX2 is in parallel with the second normally opened contact of signal relay KX1.
The coil of the normally opened contact of residual current relay KN, signal relay KX3, mains switch SA and single phase alternating current power supply 6 are connected into a loop.The first normally opened contact of signal relay KX3, indicator light H3, mains switch SA and single phase alternating current power supply 6 are connected into a loop.The second normally opened contact of signal relay KX3 is in parallel with the second normally opened contact of signal relay KX1.
Closed isolating switch QS and mains switch SA.Press start button ST, the coil electricity of A.C. contactor KM, the contact is opened in the first normally opened contact of A.C. contactor KM, the second normally opened contact, the 3rd normally opened contact, the 4th normally opened contact, 5 constant virtues and the 6th normally opened contact is closed, and three-phase alternating-current motor 10 energisings start, and indicator light RD lights.
In start-up course, three-phase alternating-current motor 10 rotating speeds accelerate, and electric current is larger in the circuit.Because electric current is excessive when starting, the normally-closed contact of current relay KL disconnects, the coil blackout of A.C. contactor KMY, and the first normally opened contact of A.C. contactor KMY, the second normally opened contact and the 3rd normally opened contact disconnect.At this moment, reactor L plays hindrance function, reduces the starting current of three-phase alternating-current motor 10, prevents that the transmission line voltage drop is excessive, guarantees that three-phase alternating-current motor 10 normally starts.When three-phase alternating-current motor 10 rotating speeds enter at the uniform velocity state, current reduction is to stable state, the normally-closed contact of current relay KL is closed, the coil electricity of A.C. contactor KMY, the first normally opened contact of A.C. contactor KMY, the second normally opened contact, the 3rd normally opened contact and the 4th normally opened contact are closed, reactor L quits work, and indicator light HLRD lights.
When three-phase alternating-current motor 10 overload, three-phase alternating-current motor 10 operating currents are excessive, and the electric current by current relay KGL coil surpasses set point, and the normally opened contact of current relay KGL is closed, the coil electricity of time relay KT.The normally-closed contact of time relay KT disconnects through behind the setting-up time, A.C. contactor KM outage, the first normally opened contact of A.C. contactor KM, the second normally opened contact, the 3rd normally opened contact disconnect, three-phase alternating-current motor 10 quits work, prevent that three-phase alternating-current motor 10 from damaging, the normally-closed contact of A.C. contactor KM is closed, and indicator light HLGN lights.
In three-phase alternating-current motor 10 runnings, when the A of three-phase alternating-current supply 5 phase, B phase and C any one disconnected mutually or during phase shortage mutually in mutually, voltage on voltage relay KY1, voltage relay KY2 or the voltage relay KY3 surpasses the set point action, signal relay KX1 coil electricity, the first normally opened contact of signal relay KX1 and the second normally opened contact are closed, indicator light H1 lights, electric bell HA reports to the police, remind staff's three-phase alternating-current motor 10 to be in mutually disconnected or open-phase running status, need carry out emergency treatment.
In three-phase alternating-current motor 10 runnings, when the A of three-phase alternating-current supply 5 phase, B phase and C mutually in any one when low-voltage occurring mutually, voltage on the coil of voltage relay KY4 is lower than set point, the normally opened contact of voltage relay KY4 is closed, the first normally opened contact of signal relay KX2 and the second normally opened contact are closed, and indicator light H2 lights, and electric bell HA reports to the police, remind staff's three-phase alternating-current motor 10 to be in the subnormal voltage operation state, need carry out emergency treatment.
In three-phase alternating-current motor 10 runnings, when the A of three-phase alternating-current supply 5 phase, B phase and C any one electric leakage occurs in mutually mutually, when producing zero-sequence current, the induced current that current transformer TA5 produces is non-vanishing, the coil electricity of residual current relay KN, the normally opened contact of residual current relay KN is closed, the first normally opened contact of signal relay KX3 and the second normally opened contact are closed, indicator light H3 lights, electric bell HA reports to the police, remind staff's three-phase alternating-current motor 10 to be in the electric leakage running status, need carry out emergency treatment
Claims (7)
1. three-phase alternating-current motor control device, it is characterized in that: comprise current detection module (1), reactor L, the first switch module (2), second switch module (3) and control module (4), three inputs of described the first switch module (2) respectively with the A phase of three-phase alternating-current supply (5), the B phase links to each other with C, three outputs of the first switch module (2) link to each other with three inputs of reactor L by current detection module (1) respectively, three outputs of reactor L link to each other with three winding terminals of three-phase alternating-current motor (10) respectively, three inputs of described second switch module (3) link to each other with three inputs of reactor L respectively, three outputs of second switch module (3) link to each other with three outputs of reactor L respectively, the signal output part of current detection module (1), the control end of the control end of the first switch module (2) and second switch module (3) links to each other with control module (4) respectively.
2. a kind of three-phase alternating-current motor control device according to claim 1, it is characterized in that: described current detection module (1) comprises current transformer TA1, current transformer TA2 and current relay KL, the A phase output current of three-phase alternating-current supply (5) and C mutually output current pass respectively the iron core of the iron core summation current transformer TA2 of current transformer TA1, the coil one end ground connection of current transformer TA1, the other end links to each other with the first coil one end of current relay KL, the first coil other end of current relay KL links to each other with the second coil one end and tertiary coil one end thereof of current relay KL respectively, the second coil other end of current relay KL links to each other with current transformer TA2 one end, the tertiary coil other end summation current transformer TA2 other end of current relay KL is ground connection all, and the normally-closed contact of current relay KL links to each other with control module (4).
3. a kind of three-phase alternating-current motor control device according to claim 2, it is characterized in that: described control module (4) comprises start button ST, stop button STP, A.C. contactor KM and A.C. contactor KMY, described the first switch module (2) is by the first normally opened contact of A.C. contactor KM, the second normally opened contact and the 3rd normally opened contact form, described second switch module (3) is by the first normally opened contact of A.C. contactor KMY, the second normally opened contact and the 3rd normally opened contact form, the series circuit that the 4th normally opened contact of A.C. contactor KM and the coil of A.C. contactor KM form and the normally-closed contact of current relay KL, 5 constant virtues of A.C. contactor KM is left the series circuit that the coil of contact and A.C. contactor KMY forms and is unified into a parallel circuits, this parallel circuits and stop button STP and single phase alternating current power supply (6) are connected into one and start control loop, and start button ST is in parallel with the 4th normally opened contact of A.C. contactor KM.
4. a kind of three-phase alternating-current motor control device according to claim 3, it is characterized in that: also comprise overload detection module (7), overload detection module bag (7) is drawn together current transformer TA3, current transformer TA4 and current relay KGL, described control module (4) also comprises time relay KT, the A phase output current of three-phase alternating-current supply (5) and C mutually output current pass respectively the iron core of the iron core summation current transformer TA4 of current transformer TA3, current transformer TA3 one end ground connection, the other end links to each other with coil one end summation current transformer TA4 one end of current relay KGL respectively, the coil other end summation current transformer TA4 other end ground connection of current relay KGL, the normally opened contact of current relay KGL, the coil of time relay KT and single phase alternating current power supply (6) are connected into a loop, and the normally-closed contact of time relay KT is serially connected with in the described startup control loop.
5. according to claim 3 or 4 described a kind of three-phase alternating-current motor control device, it is characterized in that: also comprise voltage detection module (8), voltage detection module (8) comprises voltage transformer TV, voltage relay KY1, voltage relay KY2 and voltage relay KY3, described control module (4) also comprises signal relay KX1 and indicator light H1, three inputs of voltage transformer TV primary coil respectively with the A phase of three-phase alternating-current supply (5), the B phase links to each other with C, the coil two ends of voltage relay KY1 link to each other with the B phase output terminal with the A phase output terminal of voltage transformer TV secondary coil respectively, the coil two ends of voltage relay KY2 link to each other with the C phase output terminal with the B phase output terminal of voltage transformer TV secondary coil respectively, the coil two ends of voltage relay KY3 link to each other with the C phase output terminal with the A phase output terminal of voltage transformer TV secondary coil respectively, single phase alternating current power supply (6), the coil of signal relay KX1, the normally opened contact of voltage relay KY1 and normally-closed contact thereof are connected into a loop, the normally opened contact of the normally opened contact of voltage relay KY2 and voltage relay KY3 is in parallel with the normally opened contact of voltage relay KY1 respectively, the normally-closed contact of the normally-closed contact of voltage relay KY2 and voltage relay KY3 is in parallel with the normally-closed contact of voltage relay KY1 respectively, the normally opened contact of signal relay KX1, indicator light H1 and single phase alternating current power supply (6) are connected into a loop.
6. a kind of three-phase alternating-current motor control device according to claim 5, it is characterized in that: described voltage detection module (8) also comprises voltage relay KY4, described control module (4) also comprises signal relay KX2 and indicator light H2, the coil two ends of voltage relay KY4 link to each other with the C phase output terminal with the A phase output terminal of voltage transformer TV secondary coil respectively, the normally opened contact of voltage relay KY4, the coil of signal relay KX2 and single phase alternating current power supply (6) are connected into a loop, the normally opened contact of signal relay KX2, indicator light H2 and single phase alternating current power supply (6) are connected into a loop.
7. according to claim 3 or 4 described a kind of three-phase alternating-current motor control device, it is characterized in that: also comprise detection of electrical leakage module (9), detection of electrical leakage module (9) comprises current transformer TA5 and residual current relay KN, described control module (4) comprises signal relay KX3 and indicator light H3, the A phase output current of three-phase alternating-current supply (5), B phase output current and C mutually output current pass the iron core of current transformer TA5, the coil of the coil of current transformer TA5 and residual current relay KN is connected into a loop, the normally opened contact of residual current relay KN, the coil of signal relay KX3 and single phase alternating current power supply (6) are connected into a loop, the normally opened contact of signal relay KX3, indicator light H3 and single phase alternating current power supply (6) are connected into a loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220515536 CN202872701U (en) | 2012-10-09 | 2012-10-09 | Control device for three-phase alternating-current motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220515536 CN202872701U (en) | 2012-10-09 | 2012-10-09 | Control device for three-phase alternating-current motors |
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| Publication Number | Publication Date |
|---|---|
| CN202872701U true CN202872701U (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220515536 Expired - Fee Related CN202872701U (en) | 2012-10-09 | 2012-10-09 | Control device for three-phase alternating-current motors |
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| Country | Link |
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| CN (1) | CN202872701U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647251A (en) * | 2013-11-25 | 2014-03-19 | 衡阳泰豪通信车辆有限公司 | A vehicle-mounted power supply security control apparatus and a control method |
| CN106340855A (en) * | 2016-05-22 | 2017-01-18 | 湖南吉利汽车部件有限公司 | Relay protection control device for motor |
-
2012
- 2012-10-09 CN CN 201220515536 patent/CN202872701U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647251A (en) * | 2013-11-25 | 2014-03-19 | 衡阳泰豪通信车辆有限公司 | A vehicle-mounted power supply security control apparatus and a control method |
| CN103647251B (en) * | 2013-11-25 | 2018-11-09 | 衡阳泰豪通信车辆有限公司 | A kind of vehicle power supply safety control device and control method |
| CN106340855A (en) * | 2016-05-22 | 2017-01-18 | 湖南吉利汽车部件有限公司 | Relay protection control device for motor |
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