CN215871092U - Double-speed all-in-one machine - Google Patents

Abstract

The utility model relates to a double-speed all-in-one machine, which comprises a motor with a low-speed winding and a high-speed winding, and a power supply interface used for connecting an external power supply, wherein a first power supply line is connected with the power supply interface and the low-speed winding and used for supplying power to the low-speed winding, a second power supply line is connected with the power supply interface and the high-speed winding and used for supplying power to the high-speed winding, a first contactor is connected in series in the first power supply line and used for controlling the low-speed winding to run, and a second contactor is connected in series in the second power supply line and used for controlling the high-speed winding to run. The scheme solves the problems of large quantity of motor power supply cables and large laying workload in mine production.

Description

Double-speed all-in-one machine

Technical Field

The utility model relates to the technical field of motors. Specifically, the utility model relates to a double-speed all-in-one machine.

Background

The variable speed motor has the characteristics of large low-speed starting torque, small starting current and high efficiency in high-speed operation, is gradually increased in mine production, and has wide market prospect. The variable-speed motor is adopted to replace a single-speed motor to drive the scraper conveyor in the mine, and a hydraulic coupler can be omitted, so that the hidden danger of oil injection ignition is eliminated, the burning loss of the motor is effectively reduced, the problem of difficulty in starting the conveyor is solved, and the mine safety is further guaranteed. At present, a variable speed motor for driving a scraper conveyor under a mine is a double-speed motor with a double-winding and double-squirrel-cage structure. The double-speed motor adopts two sets of windings with high speed and low speed, the low-speed winding is adopted for starting when the motor is started, and the high-speed winding is switched to when the motor is normally operated. Because the structure of two sets of windings is adopted, when the double-speed motor is supplied with power and wired, at least two sets of power supply cables are usually laid, one set is connected with the low-speed winding, and the other set is connected with the high-speed winding, so that the rotating speed of the motor is controlled through the two sets of cables. When a plurality of double-speed motors are required to operate in mine production, a large number of cables are required, so that the cable laying workload of workers is increased, the circuit complexity in an equipment area is increased, and the safety production of a mine is not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model provides a double-speed all-in-one machine, which at least solves the problems of large quantity of power supply cables of a motor and large laying workload in mine production.

In order to solve at least the above technical problem, in a first aspect, the present invention provides a two-speed all-in-one machine, comprising: the motor comprises a low-speed winding and a high-speed winding and is used for realizing low-speed operation and high-speed operation; the power interface is used for connecting an external power supply; the first power supply circuit is connected with the power interface and the low-speed winding and used for supplying power to the low-speed winding; the second power supply circuit is connected with the power interface and the high-speed winding and used for supplying power to the high-speed winding; the first contactor is connected in series in a first power supply circuit between the power interface and the low-speed winding and used for controlling the low-speed winding to operate; and the second contactor is connected in series in a second power supply line between the power interface and the high-speed winding and is used for controlling the high-speed winding to operate.

In one embodiment, further comprising: a controller connected to the first contactor and the second contactor for: receiving a control instruction; and controlling the first contactor and the second contactor to be switched on or switched off according to the control instruction so as to control the motor to start, stop, run at a low speed or run at a high speed.

In one embodiment, the device further comprises a power supply device, wherein an input end of the power supply device is connected with the power interface, and an output end of the power supply device is connected with the controller, the first contactor and the second contactor and used for supplying working power.

In one embodiment, the power supply device includes a transformer, the transformer includes a primary winding and a secondary winding, the primary winding is connected to the power interface, and the secondary winding is connected to the controller, the first contactor and the second contactor, and is configured to convert an external power supply into an operating power supply.

In one embodiment, the controller further comprises a soft starter, an input end of the soft starter is connected with the power interface, an output end of the soft starter is connected with the first contactor and the second contactor, and the soft starter is further connected with the controller and used for controlling the motor to start and stop according to an instruction output by the controller.

In one embodiment, a third contactor is further included, in parallel with the soft starter, for bypassing the soft starter when the motor start is complete.

In one embodiment, the soft starter comprises three sets of anti-parallel thyristors for connecting an external power supply.

In one embodiment, the soft starter further comprises a signal detection device, the signal detection device is connected with a power supply line between the power interface and the soft starter, and the signal detection device is further connected with the controller and used for detecting voltage and/or current information in the line.

In one embodiment, the remote control system further comprises a remote control interface connected with the controller and used for communicating with a remote device.

In one embodiment, the leakage protection device is connected with a power supply line between the first contactor and the high-speed winding, the leakage protection device is further connected with a power supply line between the second contactor and the low-speed winding to detect power supply current, and the leakage protection device is further connected with the controller and used for judging whether leakage occurs according to the detected power supply current.

In the scheme, only one power interface is arranged on the double-speed motor, the double-speed motor with double windings is powered through one set of cable, two power supply circuits are formed inside the integrated machine through one power interface to supply power for the low-speed winding and the high-speed winding of the motor, and two contactors integrally arranged with the double-speed motor are used for controlling the switching of the high-speed winding and the low-speed winding of the double-speed motor, so that the external part of the integrated machine only needs to be connected with the power interface through a power supply cable, more cables are not needed, and the laying number of the cables is reduced.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:

FIG. 1 is a schematic diagram schematically illustrating a two-speed all-in-one machine according to an embodiment of the present invention;

FIG. 2 is a schematic diagram schematically illustrating a two-speed all-in-one machine including a controller according to an embodiment of the present invention

FIG. 3 is a schematic diagram schematically illustrating a power supply apparatus in a two-speed all-in-one machine according to an embodiment of the present invention;

FIG. 4 is a schematic diagram that schematically illustrates a soft starter, in accordance with an embodiment of the present invention;

FIG. 5 is a schematic diagram that schematically illustrates other components in a two-speed kiosk, in accordance with an embodiment of the present invention;

FIG. 6 is a schematic diagram illustrating a two speed all-in-one housing according to an embodiment of the present invention;

fig. 1 to 6 include: the system comprises a two-speed all-in-one machine 100, a motor 101, a low-speed winding 102, a high-speed winding 103, a first contactor 104, a second contactor 105, a controller 106, a power interface 107, a power supply device 108, a soft starter 109, a third contactor 110, a fourth contactor 111, a remote control interface 112, a signal detection device 113, a pulse generation device 114 and a leakage protector 115.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The double-speed motor adopts two sets of windings with high speed and low speed, the low-speed winding has heavy starting capability and the high-speed winding has heavy running efficiency, so that the motor can be started by adopting the low-speed winding and switched to the high-speed winding during normal running. The traditional double-speed motor starter realizes the control of a double-speed motor by outputting a low-speed control cable and a high-speed control cable, namely, the starter outputs a set of cables to be connected with a low-speed winding of the motor, controls the low-speed winding of the motor to be electrified and operated by controlling a low-speed control switch in the starter so as to realize the low-speed starting process of the motor, then connects another set of cables output by the starter with a high-speed winding of the motor, and controls a corresponding control switch in the starter to control the high-speed winding to operate so as to realize the switching from the low speed to the high speed of the motor. The control process needs two sets of cables to realize the switching process of the motor from low-speed operation to high-speed operation. In mine production, a plurality of motors need to be arranged to operate, a large amount of cables need to be laid by workers, the workload of cable laying is large, the maintenance is not facilitated, the circuit complexity in an equipment area is increased, and the mine safety production is not facilitated. In order to effectively reduce the number of cables in a mine production area, the functions of the contactor in the starter are transplanted into the motor, and the low-speed to high-speed switching is realized in the motor, so that the power supply is realized by only one power interface, and the control can be realized by only laying one set of cable for one double-speed motor, thereby effectively improving the efficiency of mine production.

The following detailed description of embodiments of the utility model refers to the accompanying drawings.

Fig. 1 and 2 are schematic views schematically showing the constitution of a two-speed all-in-one machine according to an embodiment of the present invention.

As shown in fig. 1, the present invention provides a two-speed all-in-one machine 100, which includes a motor 101, a power interface 107, a first power supply line, a second power supply line, a first contactor 104, and a second contactor 105. The motor 101 may be a two-speed motor with a dual winding structure, and includes a low-speed winding 102 and a high-speed winding 103 for realizing low-speed operation and high-speed operation. And a power interface 107 for connecting an external power supply. The power supply interface 107 is divided into two power supply lines, namely a first power supply line and a second power supply line. A first supply line is connected between the power interface 107 and the low-speed winding 102 for supplying power to the low-speed winding 102. A second power supply line is connected to the aforementioned power interface 107 and the high-speed winding 103 of the motor 101 for supplying power to the high-speed winding 103. In the aforementioned first power supply line, a first contactor 104 is connected in series between the power interface 107 and the low-speed winding 102, and is used for controlling the operation of the low-speed winding 102. A second contactor 105 is connected in series in the second power supply line for controlling the operation of the high-speed winding 103 in the motor 101.

Further, as shown in fig. 2, a controller 106 is further disposed in the dual-speed all-in-one machine 100, the controller 106 is connected to the first contactor 104 and the second contactor 105, and the controller 106 is configured to receive a control command and control the first contactor 104 and the second contactor 105 to be turned on or off according to the control command, so as to control the motor 101 to start, stop, run at a low speed or run at a high speed. In one implementation scenario, the controller 106 controls the first contactor 104 to be turned on, so as to control the motor 101 to start at a low speed or to operate at a low speed, or closes the first contactor 104 and the second contactor 105 to control the motor 101 to stop operating, or controls the first contactor 104 to be turned on, so as to control the second contactor 105 to be turned on, and the first contactor 104 to be turned off, so as to control the motor 101 to switch from the low speed to the high speed after the motor 101 starts at the low speed.

The above is a brief description of the composition of the two-speed all-in-one machine 100 in the present embodiment. The structure of the two-speed all-in-one machine 100 will be described in detail below.

Fig. 3 is a schematic diagram schematically illustrating power supply unit 108 in two-speed all-in-one machine 100 according to an embodiment of the present invention. It will be appreciated that the arrangement of power supply unit 108 shown in fig. 3 in two-speed kiosk 100 may be implemented in the exemplary scenario shown in fig. 1, and thus what is described with respect to fig. 1 is equally applicable to fig. 3.

As shown in fig. 3, the dual-speed all-in-one machine 100 further includes a power supply device 108 for supplying operating power to the dual-speed all-in-one machine 100. The input of the power supply device 108 is connected to the power interface 107, so as to convert an external power supply into an operating power supply, for example, a 3.3kV power supply into a 220V operating power supply. The output of the power supply device 108 may be connected to the aforementioned controller 106, first contactor 104 and second contactor 105 to provide operating power. In one application scenario, the power supply 108 may be a transformer, and the transformer includes a primary winding and a secondary winding. The primary winding is connected to the power interface 107, and the secondary winding is connected to the controller 106, the first contactor 104, and the second contactor 105, so that the external power supply is converted into the operating power supply by arranging different turns of the primary winding and the secondary winding. Meanwhile, the transformer can also play an isolation role and prevent interference on the electric control element. Further, a rectifier may be included in the power supply device 108 to convert the ac power to dc power to provide dc power. The controller may be a PLC (programmable logic controller) having various control modes such as program control and network control, and including a central processing unit, a memory, an input/output unit, and the like, and capable of implementing functions of signal sampling, signal processing, and signal output. As another embodiment, the controller may be an industrial personal computer. The external power supply can be converted into a power supply voltage suitable for the PLC or the industrial personal computer through the transformer, for example, the voltage of 3.3kV is converted into the voltage of 220V.

Fig. 4 is a schematic diagram schematically illustrating a soft starter 109 according to an embodiment of the present invention. It will be appreciated that the arrangement of the soft starter 109 shown in fig. 4 in the two-speed kiosk 100 can be implemented in the exemplary scenario shown in fig. 1, and thus what is described with respect to fig. 1 applies equally to fig. 4.

As shown in fig. 4, the dual-speed all-in-one machine 100 further comprises a soft starter 109, and the soft starter 109 can be matched with the low-speed winding 102 in the dual-speed all-in-one machine 100 to realize smoother starting of the motor 101. Specifically, the input terminal of the soft starter 109 is connected to the power supply interface 107, and the output terminal thereof is connected to the first contactor 104 and the second contactor 105. The soft starter 109 is also connected to the controller 106 to control the start and stop of the motor 101 according to the instruction output by the controller 106. When it is desired to start the motor 101, the controller 106 may send a command to the pulse generator 114 to generate a pulse signal for driving the soft starter 109, so as to control the soft starter 109 to gradually increase the output voltage from the beginning, and at the same time, control the first contactor 104 to close and gradually accelerate the motor 101, so as to achieve a low-speed and smooth start of the motor 101.

Further, a third contactor 110 may be connected in parallel to both ends of the soft starter 109, so as to bypass the soft starter 109 when the motor 101 is started, and the soft starter 109 is taken out of operation after the start is completed. In an application scenario, besides the third contactor 110 is used for exiting the soft starter 109, when the soft starter 109 is damaged and cannot work normally, a worker can directly control the third contactor 110 to be closed, so that the two-speed all-in-one machine 100 is changed into a common two-speed motor for use. Or in an application scene that requires coal pressing, the third contactor 110 may be controlled to bypass the soft starter 109, start the coal by using the low-speed winding 102 directly, and switch to the normal soft start mode when the normal coal amount is reached. Further, the soft starter may comprise three sets of anti-parallel thyristors for connecting an external power supply. When the external power supply is three-phase ac power, three sets of anti-parallel thyristors (e.g., thyristors) may be provided in the soft starter 109 to connect to each phase of the power supply. When the motor 101 is in soft start, under the control of the controller 106, three groups of anti-parallel thyristors are synchronously conducted with the phase sequence of an external power supply according to the time sequence, the output voltage of the thyristors is gradually increased through adjusting the conduction angle of the thyristors, the motor is gradually accelerated until the thyristors are completely conducted, and the motor works on the mechanical characteristic of rated voltage, so that the motor 101 is smoothly started, the starting current is reduced, the overcurrent trip is avoided, the damage of torque impact on a transmission system when the motor 101 is started is reduced, and the reliability of the motor 101 in the running process is effectively improved.

The main constituent structure of the double-speed all-in-one machine in the present invention is described above, and in order to effectively improve the operational reliability of the double-speed all-in-one machine 100, the double-speed all-in-one machine 100 is also configured with corresponding functions of signal detection, fault diagnosis, and the like, which will be described in detail below.

FIG. 5 is a schematic diagram that schematically illustrates other components of two-speed kiosk 100, in accordance with an embodiment of the present invention. It will be appreciated that the arrangement of the components shown in fig. 5 in two-speed kiosk 100 may be implemented in the exemplary scenario shown in fig. 1, and thus what is described with respect to fig. 1 applies equally to fig. 5.

In an implementation scenario, as shown in fig. 5, the two-speed all-in-one machine 100 in this embodiment further includes a fourth contactor 111, and the fourth contactor 111 may be connected in series in a power supply line between the aforementioned power interface 107 and the soft starter 109, for controlling power supply input. When the motor 101 has a fault or needs to be stopped for maintenance, the fourth contactor 111 can be controlled to be turned off, so that the power supply can be cut off.

In an implementation scenario, the dual-speed all-in-one machine 100 further includes a signal detection device 113. The signal detection device 113 is connected to the power supply line between the aforementioned power interface 107 and the soft starter 109, thereby detecting a current or voltage signal in the power supply line. The signal detection device 113 is also connected to the controller 106, so as to transmit the detected current or voltage signal to the controller 106, so that the controller 106 can determine whether an abnormality occurs according to the detected signal.

Further, a remote control interface 112 can be provided in the dual-speed all-in-one machine 100 and connected to the controller 106, so as to establish a communication connection between the controller 106 and a remote device. On one hand, the remote device can acquire the running condition of the double-speed all-in-one machine 100 in real time, so that the working state of each motor 101 can be adjusted in time, and on the other hand, the controller 106 can also receive a control instruction from the remote device, so that the running state of the double-speed all-in-one machine 100 is controlled, the remote control of the double-speed motors is realized, and the mine production safety is improved.

In another implementation scenario, a leakage protector 115 may be further disposed in the dual-speed all-in-one machine 100, the leakage protector 115 is connected to a power supply line between the first contactor 104 and the high-speed winding 103, the leakage protector 115 is further connected to a power supply line between the second contactor 105 and the low-speed winding 102 to detect power supply currents supplied to the low-speed winding 102 and the high-speed winding 103, and the leakage protector 115 is further connected to the controller 106 to determine whether leakage occurs according to the detected power supply currents.

In addition, a shell structure schematic diagram of the double-speed all-in-one machine is shown in figure 6. As shown in fig. 6, the aforementioned motor, contactor, power supply line, etc. may be provided in the aforementioned housing structure. It is understood that the housing structure is exemplary and not limiting, and those skilled in the art can adjust the housing structure to other configurations according to the actual application scenario.

The scheme of the utility model is explained in detail in the above content, and the utility model integrates the two contactors in the motor starting control process into the motor, and only one power interface 107 is arranged for supplying power to the motor, thereby effectively reducing the laying quantity of cables, reducing the workload of cable laying for workers in mine production, and improving the working efficiency in mine production.

In the above description of the present specification, the terms "fixed," "mounted," "connected," or "connected," and the like, are to be construed broadly unless otherwise expressly specified or limited. For example, with the term "coupled", it can be fixedly coupled, detachably coupled, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship. Therefore, unless the specification explicitly defines otherwise, those skilled in the art can understand the specific meaning of the above terms in the present invention according to specific situations.

In addition, the terms "first" or "second", etc. used in this specification are used to refer to numbers or ordinal terms for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present specification, "a plurality" means at least two, for example, two, three or more, and the like, unless specifically defined otherwise.

While various embodiments of the present invention have been shown and described herein, it will be obvious to those skilled in the art that such embodiments are provided by way of example only. Numerous modifications, changes, and substitutions will occur to those skilled in the art without departing from the spirit and scope of the present invention. It should be understood that various alternatives to the embodiments of the utility model described herein may be employed in practicing the utility model. It is intended that the following claims define the scope of the utility model and that the module compositions, equivalents, or alternatives falling within the scope of these claims be covered thereby.

Claims (10)

1. A double-speed all-in-one machine is characterized by comprising:

the motor comprises a low-speed winding and a high-speed winding and is used for realizing low-speed operation and high-speed operation;

the power interface is used for connecting an external power supply;

the first power supply circuit is connected with the power interface and the low-speed winding and used for supplying power to the low-speed winding;

the second power supply circuit is connected with the power interface and the high-speed winding and used for supplying power to the high-speed winding;

the first contactor is connected in series in the first power supply circuit and used for controlling the low-speed winding to operate;

and the second contactor is connected in the second power supply circuit in series and is used for controlling the high-speed winding to operate.

2. The two-speed all-in-one machine according to claim 1, further comprising:

a controller connected to the first contactor and the second contactor for:

receiving a control instruction;

and controlling the first contactor and the second contactor to be switched on or switched off according to the control instruction so as to control the motor to start, stop, run at a low speed or run at a high speed.

3. The machine as claimed in claim 2, further comprising a power supply unit having an input connected to the power interface and an output connected to the controller, the first contactor and the second contactor for providing a working power.

4. The machine as claimed in claim 3, wherein the power supply means comprises a transformer having a primary winding and a secondary winding, the primary winding being connected to the power interface and the secondary winding being connected to the controller, the first contactor and the second contactor for converting an external power supply to a working power supply.

5. The double-speed all-in-one machine as claimed in claim 2, further comprising a soft starter, wherein an input end of the soft starter is connected with the power interface, an output end of the soft starter is connected with the first contactor and the second contactor, and the soft starter is further connected with the controller and used for controlling the motor to start and stop according to an instruction output by the controller.

6. The two-speed all-in-one machine according to claim 5, further comprising a third contactor connected in parallel with the soft starter for bypassing the soft starter when the motor start is complete.

7. The machine as claimed in claim 5, wherein the soft starter comprises three sets of anti-parallel thyristors for connecting to an external power supply.

8. The double-speed all-in-one machine as claimed in claim 5, further comprising a signal detection device, wherein the signal detection device is connected with a power supply line between the power supply interface and the soft starter, and the signal detection device is further connected with the controller and used for detecting voltage and/or current information in the line.

9. The machine as claimed in claim 2, further comprising a remote control interface connected to the controller for communicating with a remote device.

10. The two-speed all-in-one machine according to claim 2, further comprising a leakage protector, wherein the leakage protector is connected with a power supply line between the first contactor and the high-speed winding, the leakage protector is further connected with a power supply line between the second contactor and the low-speed winding to detect power supply current, and the leakage protector is further connected with the controller to judge whether leakage occurs according to the detected power supply current.

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