CN111555663B - Motor start-stop system and method based on micro-motor action - Google Patents
Motor start-stop system and method based on micro-motor action Download PDFInfo
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- CN111555663B CN111555663B CN202010447208.3A CN202010447208A CN111555663B CN 111555663 B CN111555663 B CN 111555663B CN 202010447208 A CN202010447208 A CN 202010447208A CN 111555663 B CN111555663 B CN 111555663B
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- micro
- motor action
- motor
- contactor
- thermal relay
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
- H02P3/18—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
- H02H7/0852—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load directly responsive to abnormal temperature by using a temperature sensor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
- H02H7/0854—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load responsive to rate of change of current, couple or speed, e.g. anti-kickback protection
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The invention provides a motor start-stop system and a motor start-stop method based on micro-motor action, and relates to the technical field of motor control, wherein a micro-motor action device, a start button and a stop button are arranged; the micro-motor action device comprises a micro-motor action contactor, a micro-motor action thermal relay protector and a micro-motor action circuit breaker, wherein the micro-motor action contactor, the micro-motor action thermal relay protector and the micro-motor action circuit breaker are in communication connection; the micro-motor action control device adopts a micro-motor to drive the attraction of contacts of the micro-motor action control device; the micro-motor actuating device, the starting button and the stopping button are connected with the starting motor in a direct starting mode; or alternatively; the micro-motor actuating device, the starting button and the stopping button are connected with the starting motor in a star-delta starting mode. By utilizing the system and the method provided by the invention, the intelligence of the relay protection device is improved, and the reliability of the motor start-stop system is improved.
Description
Technical Field
The invention relates to the technical field of motor control, in particular to a motor start-stop system and a motor start-stop method based on micro motor action.
Background
The running state of the existing contactor in the market is mainly that a movable contact and a movable contact of a coil are closed by a suction belt, and the contacts are disconnected by the reaction force of a spring after the power is off, so that the contactor has the advantages of physical blocking function, capability of completely separating a controlled device from a power supply after the power is off, good overvoltage and overcurrent performance, high suction power consumption of the coil, high noise, high heating temperature rise of the coil, high noise during starting/stopping, strong spark generation, no voltage, current and electric quantity monitoring function, no overcurrent, leakage and absence protection function, no contact temperature monitoring function and no communication function; the solid state relay has the advantages of no spark and noise during starting, no physical blocking function, controlled equipment hanging on a power grid after power failure, poor overvoltage and overcurrent protection, increased power consumption along with the increase of load power, obvious temperature rise, larger radiating fin, no voltage, current and electric quantity monitoring function, no overcurrent, electric leakage and fault protection function and no communication function.
The heat relay protector in the prior art mostly uses the coil after overcurrent to heat to drive the contact to open, and then uses the control circuit to control the contact to open to realize protection, only one protection threshold is realized, the threshold is realized by mechanical characteristics, the consistency is poor, the error is large, the protection time delay is long, the communication function is not provided, and the heat relay protector can not be used as a contactor when the contact of the contactor is adhered;
the circuit breaker in the prior art is mostly a manual switch, and when the contactor cannot be disconnected, the circuit breaker is disconnected by means of manual operation, so that the protection is not timely enough, and a certain hidden danger is caused to the safety of people.
Therefore, the circuit breaker, the contactor and the thermal relay in the prior art have poor intelligence, single protection performance and high power consumption during operation, and the reliability of a motor start-stop system using the coil contactor in the prior art is poor, the protection function is few, the intelligence is poor, and the power consumption is high.
Disclosure of Invention
In view of the above, the present invention aims to provide a micro-motor action-based motor start-stop system and a micro-motor action-based motor start-stop method, which can perform active pre-diagnosis and fault diagnosis alarm on load equipment in all directions by improving the intelligence of a relay protection device in the prior art, thereby improving the reliability of start-stop and operation of the motor, enabling the operation electric energy to be near zero energy consumption, and being easy to form a new generation of intelligent electric standard.
In a first aspect, the present invention provides a motor start-stop system based on micro-motor action, comprising:
a micro motor action device, a start button and a stop button;
the micro-motor action device comprises a micro-motor action contactor, a micro-motor action thermal relay protector and a micro-motor action circuit breaker, wherein the micro-motor action contactor, the micro-motor action thermal relay protector and the micro-motor action circuit breaker are in communication connection;
the micro-motor action control device adopts a micro-motor to drive the attraction of contacts of the micro-motor action control device;
the micro-motor action device, the starting button and the stopping button are connected with a starting motor in a direct starting mode;
or alternatively;
the micro-motor actuating device, the starting button and the stopping button are connected with the starting motor in a star-delta starting mode.
Preferably, the micro-motor actuating device, the start button and the stop button are connected with the start motor by direct start, and the method comprises the following steps:
the micro-motor action circuit breaker, the micro-motor action device, the start button and the stop button are connected with the start motor in a direct start mode, and the micro-motor action circuit breaker comprises:
one end of the stop button is connected with an external power supply;
the other end of the stop button is connected with one end of the start button;
the micro-motor action thermal relay protector comprises a micro-motor action thermal relay protector movable contact; the micro-motor action contactor comprises a micro-motor action contactor movable contact, and the micro-motor action contactor comprises a micro-motor action contactor main contact, a micro-motor action contactor first auxiliary contact and a micro-motor action contactor second auxiliary contact;
the other end of the stop button is connected with one end of the auxiliary contact of the micro-motor action thermal relay protector, and the other end of the movable contact of the micro-motor action thermal relay protector is grounded;
the micro-motor action contactor comprises a main contact of the micro-motor action contactor, a first auxiliary contact of the micro-motor action contactor and a second auxiliary contact of the micro-motor action contactor;
the first auxiliary contact of the micro-motor action contactor is connected in parallel with two ends of the starting button and is connected with one end of the auxiliary contact of the micro-motor action thermal relay protector through an indicator lamp;
a first auxiliary contact of the micro-motor action contactor and an indicator lamp are connected in series between the other end of the stop button and one end of an auxiliary contact of the micro-motor action thermal relay protector;
the micro-motor action circuit breaker, the main contact of the micro-motor action contactor and the micro-motor action thermal relay protector are connected in series before an external power supply and a motor.
Preferably, the micro-motor actuating device, the start button and the stop button are connected with the start motor through a star-delta start mode, and the micro-motor actuating device comprises:
the micro-motor action device also comprises a micro-motor action time relay;
the micro-motor action contactor comprises a first micro-motor action contactor, a second micro-motor action contactor and a third micro-motor action contactor;
the motor action contactor, the micro-motor action breaker and the motor action time relay all comprise main contacts and auxiliary contacts;
the main contact of the first micro-motor action contactor is connected with a motor through the micro-motor action thermal relay protector;
the main contact of the second micro-motor action contactor is connected with a motor;
a main contact of the third micro-motor action contactor is connected in series between a main contact of the first micro-motor action contactor and a main contact of the second micro-motor action contactor;
the stop button and the start button are connected in sequence;
the auxiliary contact of the first micro-motor action contactor, the auxiliary contact of the third micro-motor action contactor and the micro-motor action time relay are sequentially connected and connected in parallel with two ends of the starting button.
Preferably, the micro-motor action device comprises a micro-motor, a micro-controller, a driving wheel, a driven cam, a connecting rod and a damping spring;
the micro-controller drives the micro-motor to work, an output shaft of the micro-motor is connected with a driving wheel, the driving wheel is meshed with the driven cam, and the driven cam is axially provided with a continuous groove with different depths;
the connecting rod is connected with the groove, the other end of the connecting rod passes through the damping spring and is connected with the movable contact, the micro motor controls the driving wheel to rotate so as to drive the driven cam to rotate, concave-convex points in the groove of the driven cam drive the connecting rod to move, and the connecting rod drives the movable contact to move so as to realize the attraction or disconnection of the contact.
Preferably, the micro-motor action contactor further comprises a thyristor, a gate electrode of the thyristor is connected with the microcontroller, and main contacts of the micro-motor action contactor are connected in parallel with two ends of the thyristor.
Preferably, the micro-motor actuating device further comprises a current signal receiving device.
Preferably, the micro-motor operation thermal relay protection device further comprises an energy storage power supply, wherein the energy storage power supply is used for supplying power to the micro-motor operation contactor and the micro-motor operation thermal relay protection device.
In the second aspect, the micro-motor action contactor, the micro-motor action thermal relay protector and the micro-motor action breaker are in communication connection;
acquiring current of a micro-motor contactor, and when the current of the micro-motor contactor reaches a first threshold value, enabling the micro-motor contactor to act;
if the current of the micro-motor contactor reaches a first threshold value, the micro-motor contactor does not act, and the micro-motor is triggered to act as a thermal relay protector;
if the current of the micro-motor contactor reaches a first threshold value, the micro-motor contactor and the micro-motor action thermal relay protector do not act, and then the micro-motor action breaker is triggered to act;
and/or;
triggering the micro-motor action thermal relay protector to work when the micro-motor action thermal relay protector reaches a second threshold;
triggering the micro-motor action contactor to act when the micro-motor action thermal relay protector reaches a second threshold and the micro-motor action thermal relay protector does not work;
when the micro-motor action thermal relay protector reaches a second threshold value, and the micro-motor action thermal relay protector and the micro-motor action contactor do not work, triggering the micro-motor action circuit breaker to act.
The embodiment of the invention has the following beneficial effects: the invention provides a motor start-stop system based on micro-motor action, which relates to the technical field of motor control, and comprises a micro-motor action device, a start button and a stop button; the micro-motor action device comprises a micro-motor action contactor, a micro-motor action thermal relay protector and a micro-motor action circuit breaker, wherein the micro-motor action contactor, the micro-motor action thermal relay protector and the micro-motor action circuit breaker are in communication connection; the micro-motor action control device adopts a micro-motor to drive the attraction of contacts of the micro-motor action control device; the micro-motor actuating device, the starting button and the stopping button are connected with the starting motor in a direct starting mode; or alternatively; the micro-motor actuating device, the starting button and the stopping button are connected with the starting motor in a star-delta starting mode. By utilizing the system and the method provided by the invention, the intelligence of the relay protection device is improved, and the reliability of the motor start-stop system is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a circuit diagram of a direct start of a motor start-stop system based on micro motor action according to an embodiment of the present invention;
fig. 2 is a star-delta starting circuit diagram of a motor start-stop system based on micro motor action provided by an embodiment of the invention;
FIG. 3 is a diagram of a micro-motor motion control device according to an embodiment of the present invention;
fig. 4 is a schematic diagram of thyristor connection of a micro-motor action control device according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a power supply mode for controlling the motion of a direct-start micro-motor according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a star-delta-start micro-motor motion control power supply mode according to an embodiment of the present invention.
Icon: 1-a driven cam; 2-connecting rod: 3-a microcontroller; 4-a damping spring; 5-a copper-clad plate; 6, a driving wheel; 7-micro motor.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
At present, the relay is attracted through the coil, and the relay protection device designed by the relay is easy to generate open-phase. The motor start-stop system and the motor start-stop method based on the micro motor action can improve the intelligence of the relay protection device in the prior art, further improve the reliability of the motor start-stop system and enable the running electric energy to be near zero energy consumption.
For the convenience of understanding the present embodiment, first, a system and a method for starting and stopping a motor based on micro motor action disclosed in the embodiments of the present invention will be described in detail.
Embodiment one:
the first embodiment of the invention provides a motor start-stop system based on micro motor action, which comprises:
a micro motor action device, a start button and a stop button;
the micro-motor action device comprises a micro-motor action contactor, a micro-motor action thermal relay protector and a micro-motor action circuit breaker, wherein the micro-motor action contactor, the micro-motor action thermal relay protector and the micro-motor action circuit breaker are in communication connection;
the micro-motor action control device adopts a micro-motor to drive the attraction of contacts of the micro-motor action control device;
the micro-motor action device, the starting button and the stopping button are connected with a starting motor in a direct starting mode;
or alternatively;
the micro-motor actuating device, the starting button and the stopping button are connected with the starting motor in a star-delta starting mode.
Example two
As shown in fig. 2, in the second embodiment of the present invention, the connection mode and the working mode of the micro-motor action circuit breaker, the micro-motor action device, the start button and the stop button connected with the start motor through the direct start mode are described
The micro-motor action device, the start button and the stop button are connected with the start motor in a direct start mode, and the micro-motor action device comprises:
one end of the stop button is connected with an external power supply;
the other end of the stop button is connected with one end of the start button;
the micro-motor action thermal relay protector comprises a micro-motor action thermal relay protector movable contact;
the other end of the stop button is connected with one end of the auxiliary contact of the micro-motor action thermal relay protector, and the other end of the movable contact of the micro-motor action thermal relay protector is grounded;
the micro-motor action contactor comprises a main contact of the micro-motor action contactor, a first auxiliary contact of the micro-motor action contactor and a second auxiliary contact of the micro-motor action contactor;
the first auxiliary contact of the micro-motor action contactor is connected in parallel with two ends of the starting button and is connected with one end of the auxiliary contact of the micro-motor action thermal relay protector through an indicator lamp;
a first auxiliary contact of the micro-motor action contactor and an indicator lamp are connected in series between the other end of the stop button and one end of an auxiliary contact of the micro-motor action thermal relay protector;
the micro-motor action circuit breaker, the main contact of the micro-motor action contactor and the micro-motor action thermal relay protector are connected in series before an external power supply and a motor.
Further, when the start button is triggered, the first auxiliary contact of the micro-motor action contactor is attracted, the main contact of the micro-motor action contactor is attracted, the motor works, when the start button is attracted, the motor is started, meanwhile, the indicator lamp D2 works, and when the start button is disconnected, the first auxiliary contact of the micro-motor action contactor is attracted, and the motor is still in a working state.
Thus, the design of a motor control circuit using the micro motor action control device is realized.
In the implementation provided by the invention, KM is a current signal receiving device and a main contact of the micro-motor action contactor, when the current signal receiving device of the micro-motor action contactor receives a signal, the micro-motor action contactor works (a box represents the signal receiving device, KM2 connected with a motor is the main contact, and the rest is an auxiliary contact);
FR is a thermal detection element of the micro-motor action thermal relay protector, and when the micro-motor action thermal relay protector receives a signal, the micro-motor action thermal relay protector works (a signal receiving device is connected with a motor);
as shown in fig. 4, it should be further noted that in the embodiment provided by the present invention, the micro-motor action contactor may also be triggered by a thyristor, and specifically, the micro-motor action contactor further includes a thyristor, where a gate electrode of the thyristor is connected to an output port of a micro-motor, which is described later, in the micro-motor action contactor, and a main contact of the micro-motor action contactor is disposed between a cathode and an anode of the thyristor.
It should be noted that in the embodiment provided by the present invention, the present invention further includes an energy storage power source, where the energy storage power source is used to supply power to the micro-motor action contactor and the micro-motor action thermal relay protector.
Furthermore, the micro-motor action contactor and the micro-motor action thermal relay protector are both provided with the energy storage power supply, and the micro-motor action contactor and the micro-motor action thermal relay protector can be independently driven by the energy storage power supply, so that the safety of the system is further improved.
Embodiment III:
the micro-motor action device, the start button and the stop button are connected with the start motor in a star-delta start mode, and the micro-motor action device comprises:
the micro-motor action device also comprises a micro-motor action time relay;
the micro-motor action contactor comprises a first micro-motor action contactor, a second micro-motor action contactor and a third micro-motor action contactor;
the motor action contactor, the micro-motor action breaker and the motor action time relay all comprise main contacts and auxiliary contacts;
the main contact of the first micro-motor action contactor is connected with a motor through the micro-motor action thermal relay protector;
the main contact of the second micro-motor action contactor is connected with a motor;
a main contact of the third micro-motor action contactor is connected in series between a main contact of the first micro-motor action contactor and a main contact of the second micro-motor action contactor;
the stop button and the start button are connected in sequence;
the auxiliary contact of the first micro-motor action contactor, the auxiliary contact of the third micro-motor action contactor and the micro-motor action time relay are sequentially connected and connected in parallel with two ends of the starting button.
Further, when the start button is triggered, the auxiliary contact of the first micro-motor action contactor is attracted, so that the second micro-motor action contactor and the micro-motor action time relay are triggered to work, the auxiliary contact of the second micro-motor action contactor is a normally closed contact, and the second micro-motor action contactor is triggered to work;
in fig. 3, KM1 is a current signal receiving device of the first micro-motor operation contactor, an auxiliary contact and a main contact thereof, and when the current signal receiving device of the first micro-motor operation contactor receives a signal, the first micro-motor operation contactor operates (the block indicates the signal receiving device described later, and the specific signal receiving device is a current signal;)
KM2 is a current signal receiving device of the second micro-motor action contactor, an auxiliary contact and a main contact thereof, when the current signal receiving device of the second micro-motor action contactor receives a signal, the second micro-motor action contactor works (a box represents the signal receiving device, KM2 connected with a motor is the main contact, and the rest is the auxiliary contact);
KM2 is a current signal receiving device of the third micro-motor action contactor, an auxiliary contact and a main contact thereof, when the current signal receiving device of the third micro-motor action contactor receives a signal, the third micro-motor action contactor works (a box represents the signal receiving device, KM three connected with a motor is the main contact, and the rest is the auxiliary contact);
KM3 is a current signal receiving device of the third micro-motor action contactor, an auxiliary contact and a main contact thereof, when the current signal receiving device of the third micro-motor action contactor receives a signal, the third micro-motor action contactor works (a box represents the signal receiving device, KM3 connected with a motor is the main contact, and the rest is the auxiliary contact);
KT is the current signal receiving device of the micro-motor time relay, an auxiliary contact and a main contact thereof, and when the current signal receiving device of the micro-motor time relay receives a signal, the micro-motor time relay works (a square frame represents the signal receiving device, KM3 connected with a motor is the main contact, and the rest is the auxiliary contact).
Embodiment four:
preferably, the micro-motor action device comprises a micro-motor 7, a micro-controller 3, a driving wheel 6, a driven cam 1, a connecting rod 2 and a damping spring 4;
the microcontroller 3 drives the micro motor 7 to work, an output shaft of the micro motor 6 is connected with a driving wheel 6, the driving wheel 6 is meshed with the driven cam 1, and the driven cam is axially provided with grooves with different depths;
the connecting rod 2 with the recess links to each other, and the other end of belonging connecting rod passes damping spring 4 and links to each other with the movable contact, the connecting rod with damping spring 4 links to each other, micro motor 7 control action wheel 6 rotates, and then drives driven cam 1 rotates, drives connecting rod 2 motion, connecting rod 2 drives the movable contact motion, and then realizes the actuation or the disconnection of contact.
Further, each micro-motor actuating device is driven by current, and as can be seen from the foregoing, the current input port of the micro-motor in the micro-motor actuating device receives current (which can be understood as the foregoing current receiving device) to drive the micro-motor to actuate;
further, the micro motor is a direct current and/or alternating current motor, and a driving circuit is arranged between the microcontroller and the micro motor;
when the micro motor acts, the driving wheel drives the driven cam to rotate, and then drives the connecting rod to move in the groove of the driven cam, and the connecting rod vertically moves along the axial direction of the connecting rod due to the fact that the depth of the groove is different, so that the attraction of the contact is realized.
It should be noted that the micro-motor action contactor further comprises a thyristor, the gate electrode of the thyristor is connected with the microcontroller, and the main contact of the micro-motor action contactor is connected in parallel with two ends of the thyristor.
Preferably, the micro-motor actuating device further comprises a signal receiving device.
Fifth embodiment:
the fifth embodiment of the invention provides a motor start-stop method based on micro-motor action, wherein the micro-motor action contactor, the micro-motor action thermal relay protector and the micro-motor action circuit breaker are in communication connection;
acquiring current of a micro-motor contactor, and when the current of the micro-motor contactor reaches a first threshold value, enabling the micro-motor contactor to act;
if the current of the micro-motor contactor reaches a first threshold value, the micro-motor contactor does not act, and the micro-motor is triggered to act as a thermal relay protector;
further, when the current of the micro-motor contactor reaches a first threshold and after the first time threshold is passed, the micro-motor contactor does not act, and the micro-motor action thermal relay protector is triggered to act;
if the current of the micro-motor contactor reaches a first threshold value, the micro-motor contactor and the micro-motor action thermal relay protector do not act, and then the micro-motor action breaker is triggered to act;
further, when the current of the micro-motor contactor reaches a first threshold and after a second time threshold is passed, the micro-motor contactor and the micro-motor action thermal relay protector are not operated, and then the micro-motor action circuit breaker is triggered to operate;
and/or;
triggering the micro-motor action thermal relay protector to work when the micro-motor action thermal relay protector reaches a second threshold;
triggering the micro-motor action contactor to act when the micro-motor action thermal relay protector reaches a second threshold and the micro-motor action thermal relay protector does not work;
further, when the micro-motor action thermal relay protector reaches a second threshold and a third time threshold is passed, triggering the micro-motor action contactor to act when the micro-motor action thermal relay protector does not work;
when the micro-motor action thermal relay protector reaches a second threshold value, and the micro-motor action thermal relay protector and the micro-motor action contactor do not work, triggering the micro-motor action circuit breaker to act.
Further, when the micro-motor action thermal relay protector reaches the second threshold and the fourth time threshold is passed, and the micro-motor action thermal relay protector and the micro-motor action contactor are not operated, triggering the micro-motor action breaker to act.
The relative steps, numerical expressions and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
The device provided by the embodiment of the present invention has the same implementation principle and technical effects as those of the foregoing method embodiment, and for the sake of brevity, reference may be made to the corresponding content in the foregoing method embodiment where the device embodiment is not mentioned.
The problems are solved:
1) The contactor contacts are connected with the conducting ends of the thyristors in parallel, so that large sparks and noise during starting are effectively eliminated, and the service lives of the contacts are greatly prolonged;
2) The micro-motor action contactor greatly reduces the energy consumption of a coil contactor and/or a solid-state relay in the prior art, so that the energy consumption is close to zero, the larger the power is, the longer the running time is, the more energy is saved, and the temperature rise is avoided;
3) The micro controllers of the contactors of the micro motor actions are all provided with signal receiving devices; the device effectively realizes multiple protection and remotely transmits data information in the aspects of undervoltage, overvoltage, phase loss, short circuit, open circuit, electric leakage, overcurrent, large current fluctuation, load energy consumption, load energy efficiency and the like;
4) In the embodiment provided by the method, the temperature movement of each group of contact temperatures of the micro-motor action device can be detected, so that hidden danger caused by poor contact of the contacts is avoided;
5) Under normal working conditions, the circuit breaker function of the micro-motor action is to realize manual/remote closing or opening, the contactor, the thyristor and the start-stop panel function of the micro-motor action are to realize on/off load, and the thermal relay of the micro-motor action can accurately execute protective opening such as short circuit, overcurrent, overvoltage, undervoltage, electric leakage and the like; under special working conditions, when the current of a contactor of the micro-motor action exceeds a first threshold value and the thyristor cannot be disconnected, the micro-motor action relay executes a disconnection function, and when the current exceeds a second threshold value, if the thermal relay of the micro-motor action cannot be disconnected, the circuit breaker of the micro-motor action executes a disconnection command;
the flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A micro-motor action-based motor start-stop system, comprising:
a micro motor action device, a start button and a stop button;
the micro-motor action device comprises a micro-motor action contactor, a micro-motor action thermal relay protector and a micro-motor action circuit breaker, wherein the micro-motor action contactor, the micro-motor action thermal relay protector and the micro-motor action circuit breaker are in communication connection;
the micro-motor action control device adopts a micro-motor to drive the attraction of contacts of the micro-motor action control device;
the micro-motor action device, the starting button and the stopping button are connected with a starting motor in a direct starting mode;
or alternatively;
the micro-motor action device, the starting button and the stopping button are connected with a starting motor in a star-delta starting mode;
the micro-motor action contactor, the micro-motor action breaker and the micro-motor action thermal relay protector are connected with the motor in series;
acquiring current of a micro-motor action contactor, and when the current of the micro-motor action contactor reaches a first threshold value, enabling the micro-motor action contactor to act;
if the current of the micro-motor action contactor reaches a first threshold value, the micro-motor action contactor does not act, and the micro-motor action thermal relay protector is triggered to act;
if the current of the micro-motor action contactor reaches a first threshold value, the micro-motor action contactor and the micro-motor action thermal relay protector do not act, and then the micro-motor action breaker is triggered to act;
triggering the micro-motor action thermal relay protector to act when the micro-motor action thermal relay protector reaches a second threshold;
triggering the micro-motor action contactor to act when the micro-motor action thermal relay protector reaches a second threshold and the micro-motor action thermal relay protector does not act;
when the micro-motor action thermal relay protector reaches a second threshold value and the micro-motor action thermal relay protector and the micro-motor action contactor are not operated, triggering the micro-motor action circuit breaker to operate.
2. The system of claim 1, wherein the micro-machine actuation means, the start button, and the stop button are coupled to the start motor by direct actuation comprising:
one end of the stop button is connected with an external power supply;
the other end of the stop button is connected with one end of the start button;
the micro-motor action thermal relay protector comprises a micro-motor action thermal relay protector movable contact; the micro-motor action contactor comprises a micro-motor action contactor movable contact, and the micro-motor action contactor comprises a micro-motor action contactor main contact, a micro-motor action contactor first auxiliary contact and a micro-motor action contactor second auxiliary contact;
the other end of the auxiliary contact of the micro-motor action thermal relay protector is grounded;
the micro-motor action contactor comprises a main contact of the micro-motor action contactor, a first auxiliary contact of the micro-motor action contactor and a second auxiliary contact of the micro-motor action contactor;
the first auxiliary contact of the micro-motor action contactor is connected in parallel with two ends of the starting button and is connected with one end of the auxiliary contact of the micro-motor action thermal relay protector through a second indicator lamp;
a second auxiliary contact and a first indicator lamp of the micro-motor action contactor are connected in series between the other end of the stop button and one end of the auxiliary contact of the micro-motor action thermal relay protector;
and the micro-motor action circuit breaker, the main contact of the micro-motor action contactor and the micro-motor action thermal relay protector are connected in series between an external power supply and the motor.
3. The system of claim 1, wherein the micro-machine actuation device, the start button, and the stop button are coupled to a start motor by star-delta actuation comprising:
the micro-motor action device also comprises a micro-motor action time relay;
the micro-motor action contactor comprises a first micro-motor action contactor, a second micro-motor action contactor and a third micro-motor action contactor;
the motor action contactor, the micro-motor action breaker and the motor action time relay all comprise main contacts and auxiliary contacts;
the main contact of the first micro-motor action contactor is connected with the U1Y1V1 three phases of the motor through the micro-motor action thermal relay protector;
the main contact of the second micro-motor action contactor is connected with W2U2V2 three phases of the motor;
one end of a main contact of the third micro-motor action contactor is connected with three phases U1Y1V1, and the other end is connected with three phases W2U2V 2;
the stop button and the start button are connected in sequence;
the auxiliary contact of the first micro-motor action contactor, the auxiliary contact of the third micro-motor action contactor and the micro-motor action time relay are sequentially connected, and the auxiliary contact of the first micro-motor action contactor is connected in parallel with two ends of the starting button.
4. The system of claim 1, wherein the micro-motor actuation means comprises a micro-motor, a micro-controller, a drive wheel, a driven cam, a linkage, and a damping spring;
the micro-controller drives the micro-motor to work, an output shaft of the micro-motor is connected with a driving wheel, the driving wheel is meshed with the driven cam, and the driven cam is axially provided with a continuous groove with different depths;
the connecting rod is connected with the groove, the other end of the connecting rod passes through the damping spring and is connected with the movable contact, the micro motor controls the driving wheel to rotate so as to drive the driven cam to rotate, concave-convex points in the groove of the driven cam drive the connecting rod to move, and the connecting rod drives the movable contact to move so as to realize the attraction or disconnection of the contact.
5. The system of any one of claims 1-4, the micro-motor action contactor further comprising a thyristor, a gate of the thyristor being connected to a microcontroller, a main contact stationary contact of the micro-motor action contactor being connected in parallel across the thyristor.
6. The system of claim 1, the micro-electromechanical actuation device further comprising a signal receiving device.
7. The system of claim 1, further comprising an energy storage power source for powering the micro-motor action contactor and the micro-motor action thermal relay.
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| CN202010447208.3A CN111555663B (en) | 2020-05-25 | 2020-05-25 | Motor start-stop system and method based on micro-motor action |
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| CN202010447208.3A CN111555663B (en) | 2020-05-25 | 2020-05-25 | Motor start-stop system and method based on micro-motor action |
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| CN111555663B true CN111555663B (en) | 2023-06-06 |
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| CN111555663A (en) | 2020-08-18 |
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