CN212726889U - Soft starter with built-in AC contactor - Google Patents

Abstract

The utility model relates to a built-in ac contactor's soft starter, include: the soft starter comprises a soft starter shell, wherein a heat dissipation module and an alarm module are arranged on the soft starter shell; a wiring module is arranged on the soft starter shell; the wiring module is divided into an input unit and an output unit; a soft start module, an alternating current contactor module and a temperature measuring module are packaged in the soft starter shell; the soft start module is provided with three groups of bidirectional thyristors, and the alternating current contactor module is provided with three alternating current contactors; the temperature measuring module is connected with the power supply and the alarm module; the output unit is connected with a load motor; the input unit connects three-phase 380V input voltage and connects a set of heat dissipation module in three sets of bidirectional thyristors respectively and contains: a heat dissipation hole and a heat dissipation fan; the heat dissipation holes are uniformly distributed on the soft starter shell; the radiator fan is an alternating current radiator fan, is arranged in the soft starter shell and outside the soft starter shell, is internally provided with an alternating current contactor and a radiator module, and has smaller volume and better radiating effect when other circuits are connected.

Description

Soft starter with built-in AC contactor

Technical Field

The utility model relates to a motor soft start field especially relates to a built-in ac contactor's soft starter.

Background

The soft starter of the motor is a novel starting device which is designed and produced by adopting a power electronic technology, a microprocessing technology and a modern control theory and has the international advanced level at present. The product can effectively limit the starting current when the AC asynchronous motor is started.

The motor soft starter is a novel motor control device integrating the functions of soft starting, soft stopping, light load energy saving and multiple protection functions of a motor. The soft starter of the motor adopts a three-phase anti-parallel bidirectional thyristor as a voltage regulator, and the voltage regulator is connected between a power supply and a motor stator.

When the soft starter is used for starting the motor, the output voltage of the bidirectional thyristor is gradually increased, the motor is gradually accelerated until the bidirectional thyristor is fully conducted, the motor works on the mechanical characteristic of rated voltage, smooth starting is realized, starting current is reduced, and overcurrent tripping during starting is avoided. When the motor reaches the rated revolution, the starting process is finished, the soft starter automatically replaces the completed bidirectional thyristor with the bypass contactor to provide rated voltage for the normal operation of the motor, so that the heat loss of the bidirectional thyristor is reduced, the service life of the soft starter is prolonged, the working efficiency of the soft starter is improved, and harmonic pollution of a power grid is avoided.

In view of the above, it is desirable to provide a soft starter with an ac contactor built therein, which is used in conjunction with a soft starter of a motor.

Disclosure of Invention

The utility model aims to solve the inconvenient change of ac contactor out of problem, and the problem that external ac contactor is bulky easily breaks down.

Realize the technical scheme of the utility model as follows:

the utility model relates to a soft starter with a built-in AC contactor, which comprises a soft starter shell, wherein a heat dissipation module is arranged on the soft starter shell; a wiring module is arranged on the soft starter shell; the wiring module is divided into an input unit and an output unit; an alarm module and a load module are arranged outside the shell of the soft starter; a soft start module, an alternating current contactor module and a temperature measuring module are packaged in the soft starter shell; the soft start module is provided with three groups of bidirectional thyristors, and the alternating current contactor module is provided with three alternating current contactors; the temperature measuring module is connected with the power supply and the alarm module; the input unit is connected with the soft start module, and the alternating current contactor module is in short circuit with the soft start module; the output unit is connected with the load module.

Optionally, the input unit is connected with a three-phase 380V input voltage.

Optionally, the input unit is connected with three-phase 380V input voltage and respectively connected with one of the three groups of bidirectional thyristors.

Optionally, the temperature measuring module measures the temperature in the casing of the soft starter, and the alarm module is triggered when the temperature exceeds a set first threshold value.

Optionally, the temperature measuring module measures the temperature in the casing of the soft starter, and the temperature exceeds a set second threshold value to trigger the heat dissipation module.

Optionally, the heat dissipation module includes: a heat dissipation hole and a heat dissipation fan; the heat dissipation holes are uniformly distributed on the soft starter shell; the heat dissipation fan is an alternating current heat dissipation fan and is arranged in the soft starter shell and outside the soft starter shell.

Optionally, the soft starter module further includes a main chip for determining whether the voltage is stable; controlling the switching of the power supply circuit;

optionally, the ac contactor module has three ac contactors connected to three different phases, respectively, and each ac contactor manages one phase.

Compared with the prior art, the beneficial effects of the utility model are that:

compared with the traditional soft starter, the built-in alternating current contactor and the heat dissipation assembly have smaller volume and better heat dissipation effect when other circuits are connected; when the utility model is used, each AC contactor is separately installed, and the central control controls which phase belongs to the AC contactor, once the problem occurs, the AC contactor can be quickly replaced and modified; and the motor is when big more, corresponding power will be big more, at this moment will select bigger soft starter, and the machine the inside just needs bigger ac contactor, otherwise will burn ac contactor, but ac contactor is corresponding the three-phase, and the tradition is exactly with three-phase ac contactor production in a inside, and is just so convenient, but because the restriction of volume just can not be very powerful ac contactor, the utility model discloses every ac contactor only manages one phase, so power just can be done very greatly. The heat dissipation assembly can replace a fan with proper power according to the power of the load motor.

Drawings

Fig. 1 is a simple wiring diagram of a soft starter with an ac contactor built in;

fig. 2 is a simplified diagram of a soft starter with an ac contactor built in;

fig. 3 is a simplified wiring diagram of an application of a soft starter with an ac contactor built in;

wherein:

in fig. 1: 1-alternating current fan A; 2-alternating current fan B; 3-alternating current fan C; 4-alternating current contactor A; 5-alternating current contactor B; 6-AC contactor C; 7-a main chip; 8-bidirectional thyristor A; 9-bidirectional thyristor B; 10-bidirectional thyristor C; 11-a wiring package 55; 12-a wiring package 12; 13-a wiring package 13; 14-wiring the package 14; 15-a wiring package 15; 16-connecting a thread package 16; 17-a wiring package 17; 18-a wiring package 18; 19-a wiring package 19; 20-a wiring package 20; 21-wiring a coil 21; 22-a patch package 22; 23-a patch pack 23; 24-a wiring package 24; 25-connecting a thread package 25; 26-a wiring package 26; 27-a wiring package 27; 28-wiring the package 28; 29-a wiring package 29; 30-a wiring package 30; line 31-L1; line 32-L2; line 33-L3; 34-U line; line 35-V; 36-W wire;

in fig. 2: 37-soft starter housing; 38-a wiring module; 39-an alarm module; 40-a heat dissipation module; 41-soft start module; 42-ac contactor module; 43-temperature measuring module; 44-a load module;

in fig. 3: 45-a communication module; 46-a relay; 47-soft starter; 48-a circuit breaker; 79-motor; 50-a switch; 51-a switch; 52-a switch; 53-a switch; 54-a coil; a 55-wire package; 56-a switch; 57-start stop terminal.

Detailed Description

The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that the functions, methods, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.

In the description of the present embodiments, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

Fig. 2 is a simple diagram of a device of a soft starter with an ac contactor built therein according to the present invention, the soft starter of the present invention includes a soft starter housing, and a heat dissipation module is disposed on the soft starter housing; radiating module has the louvre including evenly distributed's louvre and built-in alternating current fan on the casing of soft starter casing, and radiating module contains: the heat dissipation holes are uniformly distributed on the soft starter shell, and the heat dissipation fan is an alternating current heat dissipation fan and is arranged in the soft starter shell and outside the soft starter shell; when the utility model is powered on to work, the heat dissipation holes dissipate the heat of the internal components by the hot air in the interior in an air convection mode, so as to achieve the purpose of cooling the electronic components; in addition the even distribution of louvre is on soft starter casing, and the louvre on the soft starter casing should not be too big, prevents that the toy from flying into in the casing, right the utility model discloses cause the damage. In the utility model, the heat radiation module is used together with the temperature measurement module and the alarm module, and the temperature measurement module is connected with the power supply, the alarm module, the heat radiation module and the main chip on the soft start module; the alternating current fans start to work to dissipate heat, the number of the alternating current fans is three, and the main chip controls the number of the fans to be turned on and the proper wind speed to be turned on according to the temperature. The temperature measurement module continues to monitor the temperature in the soft starter shell, when the temperature measurement module detects that the temperature in the soft starter shell is higher than a first threshold value, the temperature is fed back to the main chip, the main chip triggers the alarm module, the alarm module gives an alarm, and a worker overhauls or cools down the soft starter with the built-in alternating current contactor. A wiring module is arranged on the soft starter shell; the wiring module is divided into an input unit and an output unit; an alarm module and a load module are arranged outside the shell of the soft starter; a soft start module, an alternating current contactor module and a temperature measuring module are packaged in the soft starter shell; in the utility model, the soft start module has three groups of bidirectional thyristors and main chips, the connection mode of the alternating current contactor module having three alternating current contactor modules and the soft starter module is shown in fig. 1, fig. 1 is a simple connection frame diagram of the soft starter with an internal alternating current contactor, and as shown in fig. 1, the soft start module has three transistors, a heat radiation component, three alternating current contactors, a main chip, a load motor and a plurality of connection lines; the preferred heat sink assembly in this embodiment may be an ac fan. A wiring packet 25 on the alternating current fan A is connected with an L3 wire, an L3 wire is a live wire, a wiring packet 26 on the alternating current fan A is connected with an L2 wire, and an L2 wire is a live wire; the wiring packet 27 on the alternating current fan B is connected with the L3 wire, and the wiring packet 28 on the alternating current fan B is connected with the L2 wire; the wiring group 29 on the alternating current fan C is connected with the L3 wire, and the wiring group 30 on the alternating current fan C is connected with the L2 wire; the left end of the bidirectional thyristor A is connected with the L1 line 31, and the right end is connected with the U line 34; the left end of the bidirectional thyristor B is connected with an L2 line 32, and the right end of the bidirectional thyristor B is connected with a V line 35; the left end of the bidirectional thyristor C is connected with an L3 line 33, and the right end of the bidirectional thyristor C is connected with a W line 36; the U-line V-line W line, U, V, W, is called three-phase, the voltage between the phases is the line voltage, the domestic voltage is 380V; the load motor is connected with a U wire 34, a V wire 35 and a W wire 36; the wiring packet 55 on the alternating current contactor A is connected with the wiring packet 24 on the main chip 7, the wiring packet 12 on the alternating current contactor A is connected with the wiring packet 23 on the main chip 7, the wiring packet 13 on the alternating current contactor A is connected with the L1 wire 31, and the wiring packet 14 on the alternating current contactor A is connected with the U wire 43 and the W wire 36; the wiring packet 15 on the alternating current contactor B is connected with the wiring packet 23 on the main chip 7, the wiring packet 16 on the alternating current contactor B is connected with the wiring packet 24 on the main chip 7, the wiring packet 17 on the alternating current contactor B is connected with the L3 wire 33, and the wiring packet 18 on the alternating current contactor B is connected with the W wire 36; the wiring packet 19 on the alternating current contactor C is connected with the wiring packet 23 on the main chip 7, the wiring packet 20 on the alternating current contactor C is connected with the wiring packet 24 on the main chip 7, the wiring packet 21 on the alternating current contactor C is connected with the L2 wire 32, and the wiring packet 22 on the alternating current contactor C is connected with the V wire 35.

In the circuit, when 380V voltage is connected to the L1 line 31, the L2 line 32 and the L3 line 33, the main chip triggers the heat dissipation module when receiving information from the temperature measurement module, the ac fan a, the ac fan B and the ac fan C start to work to start cooling the whole device, when 380V voltage is connected to the circuit, namely after power-on, the main chip 1 first detects whether the voltage is normal, and whether the three phases are balanced or not; (1) when the voltage is detected to be normal and the three phases are balanced, the main chip controls the bidirectional thyristor to start to work normally, whether the bidirectional thyristor is conducted or not is monitored in the working process of the bidirectional thyristor, if the bidirectional thyristor is completely conducted and the three phases are balanced, the main chip controls a bypass circuit connected with a wiring package 23 and a wiring package 24 to replace the bidirectional thyristor to work, and the bypass circuit is a circuit formed by connecting the wiring package on the main chip and three alternating current contactors in parallel; (2) when abnormal voltage is detected, the bidirectional thyristor is not completely conducted. In the present invention, each phase is connected to an ac contactor, i.e., one ac contactor controls one phase.

On soft starter casing, wiring module and load module in addition have input unit and output unit in the wiring module, wherein the input unit connects a set of in three-phase 380V input voltage connects three groups of bidirectional thyristor respectively, and the output unit connects the load module, uses the utility model discloses the time, only need insert the power by the input unit, receive the output unit with the load motor again, this moment, the utility model discloses can normally work. The main chip integrated on the soft start module can also judge whether the voltage is completely conducted by a stable thyristor or not, and if the voltage is stable and the thyristor is completely conducted, the main chip switches a circuit to enable the alternating current contactor to be connected into the circuit, and the soft start module is in short circuit to supply power for the circuit.

Optionally, the connection method specifically applied in the example may refer to the connection method in fig. two. As shown in fig. 3, the soft starter is a soft starter with an internal ac contactor applied in a soft start cabinet, the soft start cabinet with the internal ac contactor includes a circuit breaker, a communication module 45 corresponding to a remote controller, a relay 46 connected to the communication module 45, a soft starter 47 connected to the relay 46, and a motor 49 connected to the soft starter 47; the remote controller sends a signal to the communication module 45, a switch 50 of the communication module 45 is closed and connected with a relay 46, a switch 56 of the relay 46 is closed and communicated with a soft starter 47 with an alternating current contactor arranged inside, the circuit breaker 48 is always in a communicated state in the device, and the remote controller can remotely operate the soft start cabinet in the communicated state of the circuit breaker 48; the ac contactor is integrated in the soft starter 47, and in the soft starter 47, when the current flowing through the triac is in a complete path, the ac contactor short-circuits the triac and connects the motor. The soft starter 47 comprises a main chip which firstly detects whether the voltage is normal or not, and whether the three phases are balanced or not; (1) when the voltage is detected to be normal and the three phases are balanced, the main chip controls the bidirectional thyristor to start to work normally, whether the bidirectional thyristor is conducted or not is monitored in the working process of the bidirectional thyristor, if the bidirectional thyristor is completely conducted and the three phases are balanced, the main chip controls a bypass circuit connected with a wiring package 23 and a wiring package 24 to replace the bidirectional thyristor to work, and the bypass circuit is a circuit formed by connecting the wiring package on the main chip and three alternating current contactors in parallel; (2) when abnormal voltage is detected, the bidirectional thyristor is not completely conducted, the motor does not work, and the voltage is waited to be normal.

In practical use, when a technician uses the soft starter with the built-in alternating current contactor, compared with the traditional soft starter, due to the built-in alternating current contactor and the built-in alternating current fan, the size is smaller and the heat dissipation effect is better when other circuits are connected; when the utility model is used, each AC contactor is separately installed, and the central control controls which phase belongs to the AC contactor, once the problem occurs, the AC contactor can be quickly replaced and modified; and the motor is when big more, corresponding power will be big more, at this moment will select bigger soft starter, and the machine the inside just needs bigger ac contactor, otherwise will burn ac contactor, but ac contactor is corresponding the three-phase, and the tradition is exactly with three-phase ac contactor production in a inside, and is just so convenient, but because the restriction of volume just can not be very powerful ac contactor, the utility model discloses every ac contactor only manages one phase, so power just can be done very greatly. The fan of the alternating current contactor can be replaced by a fan with proper power according to the power of the load motor.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (8)

1. A soft starter with a built-in alternating current contactor comprises a soft starter shell (37), and is characterized in that a heat dissipation module (40) is arranged on the soft starter shell (37); a wiring module (38) is arranged on the soft starter shell (37); the junction module (38) is divided into an input unit and an output unit; an alarm module (39) and a load module (44) are arranged outside the soft starter shell (37);

a soft start module (41), an alternating current contactor module (42) and a temperature measuring module (43) are packaged in the soft starter shell (37); the soft start module (41) is provided with three groups of bidirectional thyristors, and the alternating current contactor module (42) is provided with three alternating current contactors;

the temperature measuring module (43) is connected with a power supply and the alarm module (39); the input unit is connected with the soft start module (41), and the alternating current contactor module (42) is in short circuit with the soft start module (41); the output unit is connected with a load module (44).

2. The soft starter with an internal ac contactor as claimed in claim 1, wherein the input unit is connected to a three-phase 380V input voltage.

3. The soft starter with an internal ac contactor as claimed in claim 2, wherein the input unit is connected to a three-phase 380V input voltage and is connected to one of the three groups of triacs respectively.

4. The soft starter with an internal ac contactor according to claim 1, wherein the temperature measuring module (43) measures the temperature inside the soft starter casing (37), and the alarm module (39) is triggered when the temperature exceeds a first set threshold value.

5. The soft starter with an internal ac contactor according to claim 1, wherein the temperature measuring module (43) measures the temperature inside the soft starter casing (37) and the heat dissipation module (40) is triggered when a second threshold value is exceeded.

6. The soft starter with built-in ac contactor according to claim 1, wherein the heat dissipation module (40) comprises: a heat dissipation hole and a heat dissipation fan;

the heat dissipation holes are uniformly distributed on the soft starter shell (37);

the cooling fan is an alternating current cooling fan and is arranged in the soft starter shell (37) and outside the soft starter shell (37).

7. The soft starter with an internal ac contactor according to claim 1, wherein the soft starter module further comprises a main chip for determining whether the voltage is stable; controlling the switching of the power supply circuit.

8. A soft starter with built-in ac contactor according to claim 1, characterized in that the ac contactor module (42) has three ac contactors, respectively connected to three different phases, each ac contactor managing one phase.

Images