CN115694321A - Locked-rotor control circuit - Google Patents
Locked-rotor control circuit Download PDFInfo
- Publication number
- CN115694321A CN115694321A CN202211480929.XA CN202211480929A CN115694321A CN 115694321 A CN115694321 A CN 115694321A CN 202211480929 A CN202211480929 A CN 202211480929A CN 115694321 A CN115694321 A CN 115694321A
- Authority
- CN
- China
- Prior art keywords
- motor
- control circuit
- normally
- alternating current
- line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention relates to a locked rotor control circuit, which comprises a detection element, a control circuit and a control circuit, wherein the detection element is used for acquiring a signal of a motor; the DCS control unit is connected with the detection element and is used for receiving the signal acquired by the detection element and judging whether the motor is locked according to the received signal acquired by the detection element; the motor positive and negative rotation circuit comprises a motor positive and negative rotation working circuit and a motor positive and negative rotation control circuit, the DCS control unit is connected with the motor positive and negative rotation control circuit and is used for controlling the motor positive and negative rotation control circuit, and the motor positive and negative rotation control circuit is convenient to control the motor to switch the running state of the motor during rotation blocking. According to the invention, through the detection element and the DCS control system, the motor can be controlled to switch the motion state in time when the motor is locked, the problem of motor locking is solved, and the blocked material is dredged.
Description
Technical Field
The invention belongs to the technical field of active coke desulfurization and denitrification devices, and particularly relates to a locked rotor control circuit.
Background
In active burnt SOx/NOx control device, the material in reactor and the regenerator is at the unloading in-process, the condition of material card material often appears, and the volume of reactor and regenerator is too big, and the material stockpile is more, if the condition of material card material is handled to the method that the material was dredged in the adoption conventional power failure dismantlement, can need a large amount of manpower and materials, and needs longer power off time, and longer power off time can influence active burnt SOx/NOx control device's normal operating.
Disclosure of Invention
In order to solve all or part of the problems, the invention aims to provide a locked rotor control circuit, which detects whether locked rotor occurs or not through a detection element, so that a DCS (distributed control system) control system can control a motor to switch the running state in time during locked rotor, and blocked materials can be dredged.
According to an aspect of the present invention, there is provided a lock control circuit including:
the detection element is used for acquiring a signal of the motor;
the DCS control unit is connected with the detection element and used for receiving the signal acquired by the detection element and judging whether the motor is locked according to the received signal acquired by the detection element;
the motor forward and reverse rotation circuit comprises a motor forward and reverse rotation working circuit and a motor forward and reverse rotation control circuit, the DCS control unit is connected with the motor forward and reverse rotation control circuit and is used for controlling the motor forward and reverse rotation control circuit, and the motor forward and reverse rotation control circuit is used for controlling the motor to switch the running state of the motor when the motor is locked.
Further, the motor forward and reverse rotation control circuit comprises a forward rotation control circuit, a reverse rotation control circuit and an emergency stop control circuit which are arranged between the control line L1 and the zero line N;
the positive rotation control circuit is provided with a DCS positive rotation normally-open contact, an SB1 positive rotation button and a normally-open contact of an alternating current contactor KM1, two ends of the DCS positive rotation normally-open contact and two ends of the normally-open contact of the alternating current contactor KM1 are connected in parallel with two ends of the SB1 positive rotation button, one end of the SB1 positive rotation button is connected with the control line L1, and a normally-closed contact of the alternating current contactor KM2, a coil of the alternating current contactor KM1 and a normally-closed contact of the current relay KA1 are sequentially connected between the other end of the SB1 positive rotation button and the zero line N;
the reversing control circuit is provided with a DCS reversing normally-open contact, an SB2 reversing button and a normally-open contact of an alternating current contactor KM2, two ends of the DCS reversing normally-open contact and two ends of the normally-open contact of the alternating current contactor KM2 are connected in parallel at two ends of the SB2 reversing button, one end of the SB2 reversing button is connected with the control line L1, the other end of the SB2 reversing button is connected with one end of a normally-closed contact of the alternating current contactor KM1, the other end of the normally-closed contact of the alternating current contactor KM1 is connected with one end of a coil of the alternating current contactor KM2, and one end of the coil of the alternating current contactor KM2 is connected between the coil of the alternating current contactor KM1 and the normally-closed contact of the current relay KA 1;
a DCS (distributed control System) stop button and an SB3 (synchronous bus) emergency stop button are arranged on the emergency stop control circuit, the DCS stop button is connected with the SB3 emergency stop button in parallel, one end of the SB3 emergency stop button is connected with the control line L1, the other end of the SB3 emergency stop button is connected with one end of a coil of the current relay KA1, and the other end of the coil of the current relay KA1 is connected to the zero line N;
the DCS forward rotation normally open contact, the DCS reverse rotation normally open contact and the DCS stop button are connected with the DCS control unit;
the motor forward and reverse rotation working circuit is provided with a normally open contact of an alternating current contactor KM1 and a normally open contact of an alternating current contactor KM2, and when the normally open contact of the alternating current contactor KM1 is closed, the motor rotates forward and when the normally open contact of the alternating current contactor KM2 is closed, the motor rotates reversely.
Further, the detection element is a temperature detection resistor, and two ends of the temperature detection resistor are respectively connected with the output end 11 and the output end 14 of the protection relay;
and the power supply A1 end of the protective relay is connected with the control line L1, and the power supply A2 end of the protective relay is connected with the zero line N.
Further, the device also comprises an alternating current relay KA2, wherein the T1 end of the protection relay is connected with the control line L1, the T2 end of the protection relay is connected with one end of a coil of the current relay KA2, and the other end of the coil of the current relay KA2 is connected with the zero line N;
the normally closed contact of the current relay KA2 is arranged between the normally closed contact of the current relay KA1 and the zero line N.
Furthermore, the detection element is a current transformer, a primary side winding of the current transformer is connected in series with the motor forward and reverse rotation working circuit, and an ammeter is connected between two ends of a secondary side winding of the current transformer.
Furthermore, two ends of the ammeter are respectively connected with the control line L1 and the zero line N, the control line L1 is connected with one end of the secondary side winding of the current transformer, and the zero line N is connected with the other end of the secondary side winding of the current transformer.
Further, the control line L1 is connected with one end of a normally open contact of the alternating current contactor KM1, the other end of the normally open contact of the alternating current contactor KM1 is connected with one end of a forward rotation indicator lamp, and the other end of the forward rotation indicator lamp is connected with the zero line N;
the control line L1 is connected with one end of a normally open contact of an alternating current contactor KM2, the other end of the normally open contact of the alternating current contactor KM2 is connected with one end of a reversal indicator lamp, and the other end of the reversal indicator lamp is connected with the zero line N;
the control line L1 is connected with one end of the normally closed contact of the alternating current contactor KM1, the other end of the normally closed contact of the alternating current contactor KM1 is connected with one end of the normally closed contact of the alternating current contactor KM2, the other end of the normally closed contact of the alternating current contactor KM2 is connected with one end of an emergency stop indicator lamp, and the other end of the emergency stop indicator lamp is connected with the zero line N.
Furthermore, a circuit breaker QF is arranged on the motor forward and reverse rotation working circuit, a thermal element of a thermal relay FR is arranged on the motor forward and reverse rotation working circuit, and a normally closed contact of the thermal relay FR is arranged between a connection point of the reverse rotation control circuit and the forward rotation control circuit and a normally closed contact of the current relay KA 1.
Further, the normally open contacts of the alternating current contactor KM1 and the normally open contacts of the alternating current contactor KM2 on the motor forward and reverse rotation working circuit are 3, wherein:
two ends of a normally open contact of a first alternating current contactor KM1 are respectively connected between a power line A and a U phase line of a motor, two ends of a normally open contact of a second alternating current contactor KM1 are respectively connected between a power line B and a V phase line of the motor, and two ends of a normally open contact of a third alternating current contactor KM1 are respectively connected between a power line C and a W phase line of the motor;
the two ends of the normally open contact of the alternating current contactor KM2 are respectively connected between a power line A and a W phase line of the motor, the two ends of the normally open contact of the alternating current contactor KM2 are respectively connected between a power line B and a V phase line of the motor, and the two ends of the normally open contact of the alternating current contactor KM2 are respectively connected between a power line C and a U phase line of the motor.
Furthermore, a fuse FU is arranged on the control line L1, and the fuse FU is positioned at the upstream of the forward rotation control circuit, the reverse rotation control circuit and the emergency stop control circuit.
According to the technical scheme, the locked rotor control circuit provided by the invention has the following beneficial effects:
according to the invention, whether the motor is locked or not can be detected through the detection element, so that the motor can be controlled to switch the motion state in time through the DCS control system when the motor is locked, the problem of motor locking is solved, and the blocked material is dredged; compared with the shutdown treatment in the prior art, the automatic treatment of the locked rotor is realized, and the dredging time after the locked rotor is shortened.
Drawings
FIG. 1 is a schematic view of the blanking portion of the reactor and regenerator;
FIG. 2 is a schematic circuit diagram of a motor forward/reverse rotation control circuit according to an embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of a motor forward/reverse rotation circuit corresponding to the schematic diagram of FIG. 2;
FIG. 4 is a schematic circuit diagram of a motor forward/reverse rotation control circuit according to another embodiment of the present invention;
FIG. 5 is a schematic circuit diagram of a motor forward/reverse rotation circuit corresponding to the schematic diagram of FIG. 4;
the reference numbers in the figures are:
the device comprises a motor 1, a speed change mechanism 2, a cover body 3 and a blanking pipe 4;
the device comprises a protective relay 01, a temperature detection resistor 02, a DCS forward rotation normally open contact 03, a DCS reverse rotation normally open contact 04, a DCS stop button 05 and a current transformer 06.
Detailed Description
For better understanding of the objects, structure and functions of the present invention, a locked rotor control circuit according to the present invention will be described in detail with reference to the accompanying drawings.
The technical scheme of the invention is applied to a structure which drives blanking through the rotation of a motor, for example, the blanking process of a reactor and a regenerator of an active coke desulfurization and denitrification device. As shown in fig. 1, the blanking part of the reactor and the regenerator specifically includes two blanking pipes 4, a cover 3 is disposed between the two blanking pipes 4, a driving motor 1 and a speed change mechanism 2 are disposed in the cover 3, the speed change mechanism 2 is connected with a material conveying hopper, particulate materials in the blanking pipes fall into the material conveying hopper, the driving motor 1 rotates, the motor 1 drives the material conveying hopper to rotate, so as to convey the particulate materials in the material conveying hopper into the blanking pipe below, the speed change mechanism 2 in fig. 1 is a chain wheel and chain speed change mechanism, a small chain wheel is connected with a motor shaft of the motor 1, a large chain wheel is connected with the material conveying hopper through a wheel shaft, and a chain is sleeved on the outer sides of the large chain wheel and the small chain wheel. When the motor is locked due to accumulation of a large amount of particle materials in the material conveying hopper, the rotating speed of the motor is 0 revolution and still outputs torque, the current (called locked-rotor current) during locked-rotor can reach 7 times of rated current at most, and the motor can be burnt out after a long time.
As shown in fig. 2, the locked rotor control circuit according to the embodiment of the present invention includes a detection element, a DCS control unit, and a motor forward/backward rotation circuit, where the detection element is configured to obtain a signal of a motor, where the signal is a current signal or a thermal signal;
the DCS control unit is connected with the detection element and is used for receiving a signal acquired by the detection element so as to judge whether the motor is locked or not according to the signal; specifically, for example, the detected signal is a current signal, and it is set that the locked-rotor phenomenon occurs when the detected current signal exceeds 1.5 times of the rated current, so that whether the locked-rotor phenomenon occurs in the motor can be judged according to the relationship between the detected current signal and the rated current signal; for example, the detected signal is a thermal signal, and the locked-rotor phenomenon is indicated when the detected temperature of the motor bearing exceeds 1.5 times of the normal temperature of the motor bearing, so that whether the locked-rotor phenomenon occurs in the motor can be judged according to the relation between the detected thermal signal and the normal thermal signal of the motor bearing;
the motor positive and negative rotation circuit comprises a motor positive and negative rotation working circuit and a motor positive and negative rotation control circuit, wherein the motor positive and negative rotation control circuit is used for controlling a motor of the motor positive and negative rotation working circuit to rotate positively, reversely or stop rotating, the DCS control unit is connected with the motor positive and negative rotation control circuit and is used for controlling the motor positive and negative rotation control circuit, the motor positive and negative rotation control circuit is used for controlling the motor to switch the motor running state when the motor is blocked, specifically, when the DCS control system judges that the motor is blocked in the positive rotation process, the DCS control system sends a control instruction to control the motor positive and negative rotation control circuit to stop rotating the motor, the DCS control system controls the motor to rotate reversely again after the motor stops rotating, the reverse rotation time can be set by the DCS control system according to actual needs, the motor is controlled to stop rotating again after the reverse rotation for a period of time, and the motor is controlled to start normal feeding again after the motor stops rotating.
Specifically, the detection unit detects a current signal or a heat signal of the motor and sends the detected signal to the DCS control system, the DCS control system judges whether the motor has a locked-rotor condition according to the detected data and a preset judgment condition, and when the locked-rotor condition is judged to occur, the DCS control system sends a control instruction to the motor forward and reverse rotation control circuit, so that the motor is controlled to switch the running state through the motor forward and reverse rotation control circuit; the DCS control system is a distributed control system commonly used in the control field.
In a specific embodiment, as shown in fig. 2 and 4, the motor forward and reverse rotation control circuit includes a forward rotation control circuit, a reverse rotation control circuit and an emergency stop control circuit arranged between the control line L1 and the zero line N;
the positive rotation control circuit is provided with a DCS positive rotation normally-open contact 03, an SB1 positive rotation button and a normally-open contact of an alternating current contactor KM1, two ends of the DCS positive rotation normally-open contact 03 and two ends of the normally-open contact of the alternating current contactor KM1 are connected in parallel with two ends of the SB1 positive rotation button, one end of the SB1 positive rotation button is connected with the control line L1, and a normally-closed contact of the alternating current contactor KM2, a coil of the alternating current contactor KM1 and a normally-closed contact of the current relay KA1 are sequentially connected between the other end of the SB1 positive rotation button and the zero line N;
the reversing control circuit is provided with DCS reversing normally-open contacts 04, an SB2 reversing button and normally-open contacts of an alternating current contactor KM2, two ends of the DCS reversing normally-open contacts 04 and two ends of the normally-open contacts of the alternating current contactor KM2 are connected in parallel at two ends of the SB2 reversing button, one end of the SB2 reversing button is connected with the control line L1, the other end of the SB2 reversing button is connected with one end of the normally-closed contact of the alternating current contactor KM1, the other end of the normally-closed contact of the alternating current contactor KM1 is connected with one end of a coil of the alternating current contactor KM2, and one end of the coil of the alternating current contactor KM2 is connected between the coil of the alternating current contactor KM1 and the normally-closed contact of the current relay KA 1;
a DCS stop button 05 and an SB3 emergency stop button are arranged on the emergency stop control circuit, the DCS stop button 05 is connected with the SB3 emergency stop button in parallel, one end of the SB3 emergency stop button is connected with the control line L1, the other end of the SB3 emergency stop button is connected with one end of a coil of the current relay KA1, and the other end of the coil of the current relay KA1 is connected to the zero line N;
the DCS forward rotation normally open contact 03, the DCS reverse rotation normally open contact 04 and the DCS stop button 05 are connected with the DCS control unit;
as shown in fig. 3 and 5, a normally open contact of an ac contactor KM1 and a normally open contact of an ac contactor KM2 are provided on the motor forward and reverse rotation operating circuit, and when the normally open contact of the ac contactor KM1 is closed, the motor rotates forward, and when the normally open contact of the ac contactor KM2 is closed, the motor rotates reversely.
It is specific, press SB1 corotation button, corotation control circuit's alternating current contactor KM 1's coil is got electric, alternating current contactor KM 1's normally open contact is closed, the motor begins corotation and transports the material, when motor corotation in-process DCS control system judges the motor stall according to detecting element's signal, DCS control system sends control command at first and makes the motor stall, then DCS control system sends control quality once more and makes the motor begin the reversal, after motor reversal certain time, for example, set up the time of reversal to be 25 seconds through DCS control system, send the instruction through DCS control system once more and make the motor stall, send the instruction through DCS control system at last and make the motor normally begin corotation.
When the DCS is implemented specifically, the DCS forward rotation normally open contact 03, the DCS reverse rotation normally open contact 04 and the DCS stop button 05 can be set as click-type buttons, namely, the button which can automatically reset after being released is pressed down, so that the specific control process is as follows: the DCS control system firstly sends a control instruction to the DCS stop button 05, after the DCS stop button 05 is closed, a coil of a current relay KA1 on the emergency stop control circuit is electrified, so that a normally closed contact of the current relay KA1 is disconnected, the normally closed contact of the current relay KA1 is disconnected, so that a coil of an alternating current contactor KM1 and a coil of an alternating current contactor KM2 are both electrified, a motor stops rotating, after the DCS stop button 05 is released, the DCS stop button 05 resets, the coil of the current relay KA1 on the emergency stop control circuit is electrified, and the normally closed contact of the current relay KA1 is closed again; after the motor stops rotating, the DCS control system sends a control instruction to the DCS reverse rotation normally open contact 04, the DCS reverse rotation normally open contact 04 is closed, a coil of the alternating current contactor KM2 is electrified, the normally open contact of the alternating current contactor KM2 is closed, the motor starts to rotate reversely, after the DCS reverse rotation normally open contact 04 is loosened, the DCS reverse rotation normally open contact 04 resets, however, the normally open contact of the alternating current contactor KM2 is closed, the motor still is in a reverse rotation state, after the motor rotates reversely for a certain time, for example, after the time for reverse rotation is set to be 25 seconds through the DCS control system, the DCS control system sends the control instruction to the DCS stop button 05 to enable the DCS stop button 05 to be closed again and then loosened, the motor stops rotating, and finally, the DCS control system sends the control instruction to the DCS forward rotation button to enable the motor to normally start to rotate forwards.
In the embodiment, the motor is blocked in the forward rotation process, so that normal feeding can be realized by controlling the motor to rotate reversely to process accumulated materials and controlling the motor to rotate forward again, the motor stops for a short time, and the discharging pipe does not need to be detached.
In a specific embodiment, as shown in fig. 2, the detecting element is a temperature detecting resistor 02, in this embodiment, the temperature detecting resistor 02 is used for detecting the temperature of a motor bearing, a DCS control system receives the temperature, and two ends of the temperature detecting resistor 02 are respectively connected to an output end 11 and an output end 14 of the protection relay 01; the power supply A1 end of the protective relay 01 is connected to the control line L1, the power supply A2 end of the protective relay 01 is connected to the zero line N, and specifically, for example, the temperature detection resistor 02 is a thermistor.
In a specific embodiment, as shown in fig. 2, the protection circuit further includes an ac relay KA2, the T1 end of the protection relay 01 is connected to the control line L1, the T2 end of the protection relay 01 is connected to one end of the coil of the current relay KA2, and the other end of the coil of the current relay KA2 is connected to the zero line N; and the normally closed contact of the current relay KA2 is arranged between the normally closed contact of the current relay KA1 and the zero line N. In this embodiment, current relay KA2 is used for playing the guard action, and is concrete, works as DCS stops button 05 and receives the unable normal closed back of control command of DCS control system, makes current relay KA 2's coil to get electric through protective relay 01, then current relay KA 2's normally closed contact disconnection also can make the motor stall.
In a specific embodiment, as shown in fig. 5, the detecting element is a current transformer 06, a primary winding of the current transformer 06 is connected in series to the positive and negative rotation circuit of the motor, and an ammeter is connected between two ends of a secondary winding of the current transformer 06.
In a specific embodiment, as shown in fig. 4 to 5, two ends of the ammeter are respectively connected to the control line L1 and the zero line N, the control line L1 is connected to one end of the secondary winding of the current transformer 06, and the zero line N is connected to the other end of the secondary winding of the current transformer 06.
In a specific embodiment, the control line L1 is connected to one end of a normally open contact of an ac contactor KM1, the other end of the normally open contact of the ac contactor KM1 is connected to one end of a forward rotation indicator, and the other end of the forward rotation indicator is connected to the zero line N; the control line L1 is connected with one end of a normally open contact of an alternating current contactor KM2, the other end of the normally open contact of the alternating current contactor KM2 is connected with one end of a reversal indicator lamp, and the other end of the reversal indicator lamp is connected with the zero line N; the control line L1 is connected with one end of the normally closed contact of the alternating current contactor KM1, the other end of the normally closed contact of the alternating current contactor KM1 is connected with one end of the normally closed contact of the alternating current contactor KM2, the other end of the normally closed contact of the alternating current contactor KM2 is connected with one end of an emergency stop indicator lamp, and the other end of the emergency stop indicator lamp is connected with the zero line N.
In this embodiment, the setting of corotation pilot lamp, reversal pilot lamp and scram pilot lamp is convenient for understand the running state of motor directly perceived.
In a specific embodiment, a circuit breaker QF is arranged on the positive and negative rotation working circuit of the motor.
In a specific embodiment, a heat element of a thermal relay FR is arranged on the motor forward and reverse rotation working circuit, and a normally closed contact of the thermal relay FR is arranged between a connection point of the reverse rotation control circuit and the forward rotation control circuit and a normally closed contact of the current relay KA 1.
In a specific embodiment, the number of the normally open contacts of the ac contactor KM1 and the number of the normally open contacts of the ac contactor KM2 on the positive and negative rotation operating circuit of the motor are 3, wherein: two ends of a normally open contact of a first alternating current contactor KM1 are respectively connected between a power line A and a U phase line of a motor, two ends of a normally open contact of a second alternating current contactor KM1 are respectively connected between a power line B and a V phase line of the motor, and two ends of a normally open contact of a third alternating current contactor KM1 are respectively connected between a power line C and a W phase line of the motor; the two ends of the normally open contact of the alternating current contactor KM2 are respectively connected between a power line A and a W phase line of the motor, the two ends of the normally open contact of the alternating current contactor KM2 are respectively connected between a power line B and a V phase line of the motor, and the two ends of the normally open contact of the alternating current contactor KM2 are respectively connected between a power line C and a U phase line of the motor.
In a specific embodiment, a fuse FU is disposed on the control line L1, and the fuse FU is located upstream of the forward rotation control circuit, the reverse rotation control circuit, and the emergency stop control circuit.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Furthermore, the terms "a", "an", "two", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A stall control circuit, comprising:
the detection element is used for acquiring a signal of the motor;
the DCS control unit is connected with the detection element and used for receiving the signal acquired by the detection element and judging whether the motor is locked according to the received signal acquired by the detection element;
the motor positive and negative rotation circuit comprises a motor positive and negative rotation working circuit and a motor positive and negative rotation control circuit, the DCS control unit is connected with the motor positive and negative rotation control circuit and is used for controlling the motor positive and negative rotation control circuit, and the motor positive and negative rotation control circuit is convenient to control the motor to switch the running state of the motor when in rotation blockage through the motor positive and negative rotation control circuit.
2. The locked rotor control circuit of claim 1, wherein the motor forward and reverse rotation control circuit comprises a forward rotation control circuit, a reverse rotation control circuit and an emergency stop control circuit arranged between a control line L1 and a zero line N;
the normally-closed circuit is characterized in that a DCS forward rotation normally-open contact, a SB1 forward rotation button and a normally-open contact of an alternating current contactor KM1 are arranged on the forward rotation control circuit, two ends of the DCS forward rotation normally-open contact and two ends of the normally-open contact of the alternating current contactor KM1 are connected to two ends of the SB1 forward rotation button in parallel, one end of the SB1 forward rotation button is connected with a control line L1, and a normally-closed contact of the alternating current contactor KM2, a coil of the alternating current contactor KM1 and a normally-closed contact of the current relay KA1 are sequentially connected between the other end of the SB1 forward rotation button and the zero line N;
the reversing control circuit is provided with a DCS reversing normally-open contact, an SB2 reversing button and a normally-open contact of an alternating current contactor KM2, two ends of the DCS reversing normally-open contact and two ends of the normally-open contact of the alternating current contactor KM2 are connected in parallel at two ends of the SB2 reversing button, one end of the SB2 reversing button is connected with the control line L1, the other end of the SB2 reversing button is connected with one end of a normally-closed contact of the alternating current contactor KM1, the other end of the normally-closed contact of the alternating current contactor KM1 is connected with one end of a coil of the alternating current contactor KM2, and one end of the coil of the alternating current contactor KM2 is connected between the coil of the alternating current contactor KM1 and the normally-closed contact of the current relay KA 1;
a DCS stop button and an SB3 emergency stop button are arranged on the emergency stop control circuit, the DCS stop button is connected with the SB3 emergency stop button in parallel, one end of the SB3 emergency stop button is connected with the control line L1, the other end of the SB3 emergency stop button is connected with one end of a coil of the current relay KA1, and the other end of the coil of the current relay KA1 is connected to the zero line N;
the DCS forward rotation normally open contact, the DCS reverse rotation normally open contact and the DCS stop button are connected with the DCS control unit;
the motor forward and reverse rotation working circuit is provided with a normally open contact of an alternating current contactor KM1 and a normally open contact of an alternating current contactor KM2, when the normally open contact of the alternating current contactor KM1 is closed, the motor rotates forwards, and when the normally open contact of the alternating current contactor KM2 is closed, the motor rotates reversely.
3. The locked rotor control circuit of claim 2, wherein the detection element is a temperature detection resistor, and two ends of the temperature detection resistor are respectively connected with the output end 11 and the output end 14 of the protection relay;
and the power supply A1 end of the protective relay is connected with the control line L1, and the power supply A2 end of the protective relay is connected with the zero line N.
4. The locked rotor control circuit according to claim 3, further comprising an ac relay KA2, wherein the T1 end of the protection relay is connected to the control line L1, the T2 end of the protection relay is connected to one end of the coil of the current relay KA2, and the other end of the coil of the current relay KA2 is connected to the neutral line N;
the normally closed contact of the current relay KA2 is arranged between the normally closed contact of the current relay KA1 and the zero line N.
5. The locked rotor control circuit according to claim 2, wherein the detecting element is a current transformer, a primary winding of the current transformer is connected in series to the motor forward/reverse rotation operating circuit, and an ammeter is connected between two ends of a secondary winding of the current transformer.
6. The locked rotor control circuit according to claim 5, wherein two ends of the ammeter are respectively connected to the control line L1 and the neutral line N, the control line L1 is connected to one end of the secondary winding of the current transformer, and the neutral line N is connected to the other end of the secondary winding of the current transformer.
7. The locked rotor control circuit according to claim 2, wherein the control line L1 is connected to one end of a normally open contact of an ac contactor KM1, the other end of the normally open contact of the ac contactor KM1 is connected to one end of a forward rotation indicator light, and the other end of the forward rotation indicator light is connected to the neutral line N;
the control line L1 is connected with one end of a normally open contact of an alternating current contactor KM2, the other end of the normally open contact of the alternating current contactor KM2 is connected with one end of a reversal indicator lamp, and the other end of the reversal indicator lamp is connected with the zero line N;
the control line L1 is connected with one end of the normally closed contact of the alternating current contactor KM1, the other end of the normally closed contact of the alternating current contactor KM1 is connected with one end of the normally closed contact of the alternating current contactor KM2, the other end of the normally closed contact of the alternating current contactor KM2 is connected with one end of an emergency stop indicator lamp, and the other end of the emergency stop indicator lamp is connected with the zero line N.
8. The locked rotor control circuit according to claim 2, wherein a circuit breaker QF is disposed on the motor forward/reverse rotation operating circuit, a thermal element of a thermal relay FR is disposed on the motor forward/reverse rotation operating circuit, and a normally closed contact of the thermal relay FR is disposed between a connection point of the reverse rotation control circuit and the forward rotation control circuit and a normally closed contact of the current relay KA 1.
9. The locked rotor control circuit of claim 2, wherein the number of the normally open contacts of the ac contactor KM1 and the normally open contacts of the ac contactor KM2 on the positive and negative rotation operating circuit of the motor is 3, wherein:
two ends of a normally open contact of a first alternating current contactor KM1 are respectively connected between a power line A and a U phase line of a motor, two ends of a normally open contact of a second alternating current contactor KM1 are respectively connected between a power line B and a V phase line of the motor, and two ends of a normally open contact of a third alternating current contactor KM1 are respectively connected between a power line C and a W phase line of the motor;
the two ends of the normally open contact of the alternating current contactor KM2 are respectively connected between a power line A and a W phase line of the motor, the two ends of the normally open contact of the alternating current contactor KM2 are respectively connected between a power line B and a V phase line of the motor, and the two ends of the normally open contact of the alternating current contactor KM2 are respectively connected between a power line C and a U phase line of the motor.
10. The locked-rotor control circuit according to claim 2, wherein a fuse FU is provided on the control line L1, the fuse being located upstream of the forward rotation control circuit, the reverse rotation control circuit, and the emergency stop control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211480929.XA CN115694321A (en) | 2022-11-24 | 2022-11-24 | Locked-rotor control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211480929.XA CN115694321A (en) | 2022-11-24 | 2022-11-24 | Locked-rotor control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115694321A true CN115694321A (en) | 2023-02-03 |
Family
ID=85055829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211480929.XA Pending CN115694321A (en) | 2022-11-24 | 2022-11-24 | Locked-rotor control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115694321A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117566282A (en) * | 2024-01-16 | 2024-02-20 | 苏州钧舵机器人有限公司 | Intelligent control method of object bag separation device and object bag separation system |
-
2022
- 2022-11-24 CN CN202211480929.XA patent/CN115694321A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117566282A (en) * | 2024-01-16 | 2024-02-20 | 苏州钧舵机器人有限公司 | Intelligent control method of object bag separation device and object bag separation system |
| CN117566282B (en) * | 2024-01-16 | 2024-04-12 | 苏州钧舵机器人有限公司 | Intelligent control method of object bag separation device and object bag separation system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115694321A (en) | Locked-rotor control circuit | |
| CN106787973A (en) | Drive control device and method for yaw motor of wind generating set | |
| JP2008226673A (en) | Interconnected storage battery system using lithium ion secondary battery | |
| CN218997961U (en) | Locked rotor control circuit | |
| CN104616449A (en) | Stalling preventing alarming system for inline quenching from rolling heat | |
| CN106704098B (en) | A kind of blower variable blade control system based on general-purpose servo driver | |
| JPH0631619B2 (en) | Variable speed water supply device | |
| CN210655006U (en) | Conveying equipment and operation protection device thereof | |
| JP2960694B2 (en) | Automatic reset breaker | |
| JPH07159592A (en) | Power source control device for bus with mg set and power source control method | |
| CN103509933A (en) | Fault treatment system and method of trolley type spherulitic graphite cast pipe annealing furnace | |
| JP2006181478A (en) | Shredding treatment apparatus and method of removing paper jam | |
| CN215189388U (en) | Auxiliary cut tobacco transmission control system of cigarette making machine | |
| CN216409904U (en) | Air preheater control system | |
| CN114640294A (en) | Frequency converter low-frequency locking output detection method and device | |
| JP3794208B2 (en) | Protection device for grid interconnection system | |
| CN210865043U (en) | Monitoring alarm device for slag conveyer of circulating fluidized bed boiler | |
| CN212850338U (en) | Frequency converter control circuit for mining equipment | |
| US11368122B2 (en) | Passive terminal anti-stop circuit, passive terminal anti-stop system composed of it and anti-stop method | |
| CN208991009U (en) | A kind of efficient conveying control device of siphon scraper centrifugal machine | |
| CN109193568B (en) | Thermal protection device, motor and thermal protection method thereof | |
| CN115501970A (en) | Control system and control method of double-geared roller crusher | |
| JPH02193532A (en) | Control of charger | |
| CN113859945A (en) | Anti-rotation-blocking control system of dividing wheel | |
| JPH0641350U (en) | Power supply control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |