A self-switching intelligent power supply system

Abstract

The application relates to the technical field of power supply control, in particular to a self-switching intelligent power supply system which comprises a first switching power supply, a second switching power supply and a direct-current contactor; the first switching power supply and the second switching power supply are connected with different power supplies respectively to obtain electric energy; the first switching power supply and the second switching power supply are connected with a direct-current motor; the direct-current contactor is connected with the direct-current motor and is used for controlling the direct-current motor to be connected with the first switching power supply or the second switching power supply to obtain electric energy; the scheme can realize intelligent switching of the power supply of the direct-current motor, has simple structure, can reduce cost and land occupation space, and is convenient to use and maintain.

Description

Technical Field

[0001] This invention relates to the field of power control technology, specifically to a self-switching intelligent power supply system. Background Technology

[0002] The emergency DC oil pump can automatically start after a mains power failure, thus ensuring the safe shutdown of important equipment and units. If the emergency DC oil pump fails to function properly, operators will be unable to shut down the equipment safely. For high-temperature, high-pressure, flammable, and explosive chemical plants, failure to shut down safely could lead to major safety and environmental accidents or cause significant damage to equipment, resulting in substantial economic losses.

[0003] The emergency DC oil pump is controlled by a DC motor. Its working power supply is usually DC 110V or 220V. It requires a dedicated DC power supply and battery pack. However, the purchase and maintenance costs of the dedicated DC power supply and battery pack are relatively high, the structure is relatively complex, and the space occupied is relatively large. Summary of the Invention

[0004] The present invention aims to provide a self-switching intelligent power supply system that can intelligently switch the power supply of a DC motor. It has a simple structure, reduces cost and space requirements, and is easy to use and maintain.

[0005] This invention provides the following basic solution: a self-switching intelligent power supply system for supplying power to a DC motor, comprising: a first switching power supply, a second switching power supply, and a DC contactor;

[0006] The first and second switching power supplies are connected to different power sources to obtain electrical energy.

[0007] Both the first and second switching power supplies are connected to the DC motor.

[0008] The DC contactor is connected to the DC motor and is used to control the DC motor to connect to the first or second switching power supply to obtain electrical energy, while ensuring that the other switching power supply is not damaged in the event of a failure of either switching power supply.

[0009] A DC contactor includes: a coil, normally open contacts, and normally closed contacts;

[0010] The first switching power supply and the DC motor are connected in series. The normally open contact of the DC contactor is connected in series with the first switching power supply and is located between the first switching power supply and the DC motor. The normally open contact is used to control the closing and opening of the circuit between the DC motor and the first switching power supply. The coil of the DC contactor is located between the normally open contact and the first switching power supply.

[0011] The second switching power supply is connected in series with the DC motor, and the normally closed contact of the second switching power supply is connected in series with the normally open contact of the DC contactor, located between the normally open contact and the DC motor; the normally closed contact is used to control the closing and opening of the circuit between the DC motor and the second switching power supply.

[0012] Beneficial effects of the basic scheme: Under normal circumstances, the first and second switching power supplies operate normally, and the DC motor is powered by the DC contactor, which controls the start and stop of the DC emergency oil pump. When the first switching power supply fails, the DC contactor coil automatically switches to the second switching power supply to stably power the DC motor, thereby controlling the DC emergency oil pump to run continuously and stably, ensuring that the emergency DC oil pump starts automatically and runs reliably after the mains power supply fails.

[0013] Specifically, a DC contactor is connected to a DC motor to control the DC motor to connect to a first or second switching power supply to obtain electrical energy. The DC contactor includes a coil, normally open contacts, and normally closed contacts. The first switching power supply and the DC motor are connected in series, and the normally open contacts of the DC contactor are connected in series with the first switching power supply and located between the first switching power supply and the DC motor. The normally open contacts are used to control the closing and opening of the circuit between the DC motor and the first switching power supply. The coil is disposed between the normally open contacts and the first switching power supply. A second switching power supply and the DC motor are connected in series, and the second switching power supply and the normally closed contacts of the DC contactor are connected in series and located between the normally open contacts and the DC motor. The normally closed contacts are used to control the closing and opening of the circuit between the DC motor and the second switching power supply.

[0014] Normally open contacts are open switches in the normal state (unenergized state); normally closed contacts are closed switches in the normal state. When the DC contactor coil is energized, the coil current generates a magnetic field, causing the stationary iron core to generate an electromagnetic attraction that draws the moving iron core, thus actuating the contacts: the normally closed contacts open, and the normally open contacts close, with the two actions linked. When the contactor coil is de-energized, the electromagnetic attraction disappears, and the armature is released by the release spring, causing the contacts to return to their original state: the normally open contacts open, and the normally closed contacts close. Thus, under normal circumstances, when the DC contactor is energized, the normally open contacts are closed, and the normally closed contacts are open, supplying power to the first switching power supply. If the first switching power supply fails, the DC contactor receives no current (de-energization), the normally open contacts open, disconnecting the first switching power supply, and the normally closed contacts close, supplying power to the second switching power supply. The DC contactor does not affect the power supply to the load, and faulty switching power supplies can be replaced promptly without affecting the operation of the device, thus improving power supply reliability.

[0015] The overall circuit structure is simple, occupies little space, does not require a dedicated DC power supply or battery pack, thus reducing costs, and is easy to use and maintain.

[0016] Furthermore, both the normally closed and normally open contacts are two interlocking contacts, each positioned on one of the two wires in the corresponding series circuit. The two contacts open and close simultaneously, controlling the circuit's conduction and disconnection.

[0017] Furthermore, the power supply includes: a first UPS power supply and a second UPS power supply;

[0018] The first UPS power supply is connected in series with the first switching power supply, and the second UPS power supply is connected in series with the second switching power supply. Different UPS power supplies provide stable power respectively.

[0019] Furthermore, it also includes: several miniature circuit breakers;

[0020] Miniature circuit breakers are installed at both ends of the circuits of the first and second switching power supplies for circuit protection and fault maintenance. Miniature circuit breakers provide circuit protection to prevent accidents caused by faults. Furthermore, when repair or replacement of DC contactors and contacts is required, the miniature circuit breaker can be disconnected for replacement. Refer to the miniature circuit breaker installation location for details.

[0021] Furthermore, the miniature circuit breaker includes: a first miniature circuit breaker, a second miniature circuit breaker, a third miniature circuit breaker, and a fourth miniature circuit breaker;

[0022] The first miniature circuit breaker is connected in series in the circuit between the first switching power supply and the first UPS power supply;

[0023] The second miniature circuit breaker is connected in series in the circuit between the second switching power supply and the second UPS power supply.

[0024] The third miniature circuit breaker is connected in series in the circuit between the first switching power supply and the coil.

[0025] The fourth miniature circuit breaker is connected in series in the circuit between the second switching power supply and the normally closed contact.

[0026] Furthermore, it also includes: a DC motor control unit;

[0027] The DC motor control unit is located between the DC contactor and the DC motor, and is used to control the starting and stopping of the DC motor.

[0028] Furthermore, the miniature circuit breaker also includes: a fifth miniature circuit breaker;

[0029] The fifth miniature circuit breaker is located between the DC motor control unit and the normally open contact.

[0030] Furthermore, the coil circuit of the DC contactor is connected in series with a miniature air switch or fuse.

[0031] Furthermore, it also includes: a data acquisition module, a data processing module, and a data analysis module;

[0032] The data acquisition module is used to collect power supply status information;

[0033] The data processing module is used to preprocess the status information.

[0034] The data analysis module is used to analyze the preprocessed status data and assess the probability of power supply failure.

[0035] Furthermore, the status information includes: operating status, voltage, current, power, frequency, and temperature;

[0036] During the data analysis module's analysis process, if the working status is active, voltage, current, power, frequency, and temperature are used as inputs to construct a neural network model to obtain a fault probability assessment value. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of a first embodiment of the self-switching intelligent power system of the present invention;

[0038] Figure 2 This is a schematic diagram of the structure of a miniature air switch in a second embodiment of the self-switching intelligent power system of the present invention;

[0039] Figure 3 This is a schematic diagram of the structure of a fuse in a second embodiment of the self-switching intelligent power system of the present invention. Detailed Implementation

[0040] The following detailed description illustrates the specific implementation method:

[0041] The reference numerals in the accompanying drawings include: first switching power supply 1, second switching power supply 2, DC motor control unit 3, DC motor 4, first UPS power supply 5, second UPS power supply 6, coil 301, normally open contact 302, normally closed contact 303, miniature air switch 7, and fuse 8.

[0042] In the description of this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] In the description of this specification, it should be understood that the directional terms such as "upper," "lower," "left," and "right" used in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should also be understood that when it is mentioned that one element is connected to another element "upper," "lower," "left," or "right," it can be directly connected to the other element "upper," "lower," "left," or "right," or indirectly connected to the other element "upper," "lower," "left," or "right" through an intermediate element.

[0044] Example 1

[0045] The basic implementation examples are as follows: Figure 1 As shown: A self-switching intelligent power supply system for supplying power to a DC motor 4 includes: a first switching power supply 1, a second switching power supply 2, a DC contactor, a DC motor control unit 3, and several miniature circuit breakers.

[0046] The first switching power supply 1 and the second switching power supply 2 are respectively connected to different power sources to obtain electrical energy; specifically, the power sources include: a first UPS power supply 5 and a second UPS power supply 6; the first UPS power supply 5 is connected in series with the first switching power supply 1, and the second UPS power supply 6 is connected in series with the second switching power supply 2, with different UPS power supplies providing stable power respectively. The first switching power supply 1 and the second switching power supply 2 adopt AC220 / DC110;

[0047] Both the first switching power supply 1 and the second switching power supply 2 are connected to the DC motor 4;

[0048] The DC contactor is connected to the DC motor 4 and is used to control the DC motor 4 to connect to the first switching power supply 1 or the second switching power supply 2 to obtain electrical energy.

[0049] A DC contactor includes: a coil 301 (i.e., control power supply), a normally open contact 302, and a normally closed contact 303; the normally closed contact 303 and the normally open contact 302 are both two interlocking contacts, which are respectively set on the two wires of the corresponding series circuit.

[0050] The first switching power supply 1 and the DC motor 4 are connected in series. The normally open contact 302 of the DC contactor is connected in series with the first switching power supply 1 and is located between the first switching power supply 1 and the DC motor 4. The normally open contact 302 is used to control the closing and opening of the circuit between the DC motor 4 and the first switching power supply 1. The coil 301 is disposed between the normally open contact 302 and the first switching power supply 1.

[0051] The second switching power supply 2 is connected in series with the DC motor 4, and the second switching power supply 2 is connected in series with the normally closed contact 303 of the DC contactor, located between the normally open contact 302 and the DC motor 4; the normally closed contact 303 is used to control the closing and opening of the circuit between the DC motor 4 and the second switching power supply 2.

[0052] Normally open contact 302 is the contact switch that is open in the normal state (unenergized state); normally closed contact 303 is the contact switch that is closed in the normal state. When the coil 301 of the DC contactor is energized, the current in the coil 301 generates a magnetic field, which causes the stationary iron core to generate an electromagnetic attraction to the moving iron core, and drives the contacts to move: normally closed contact 303 opens and normally open contact 302 closes, and the two are linked. When the contactor coil 301 is de-energized, the electromagnetic attraction disappears, and the armature is released under the action of the release spring, so that the contacts return to their original state: normally open contact 302 opens and normally closed contact 303 closes. Thus, under normal circumstances, when the DC contactor is energized, normally open contact 302 is closed and normally closed contact 303 is open, and the first switching power supply 1 supplies power. After the first switching power supply 1 fails, the DC contactor has no current (de-energized), normally open contact 302 opens, disconnecting the first switching power supply 1, and normally closed contact 303 closes, and the second switching power supply 2 supplies power. The DC contactor does not affect the power supply to the load, and faulty switching power supplies can be replaced in a timely manner without affecting the operation of the device, thus improving the reliability of power supply.

[0053] Miniature circuit breakers, including: a first miniature circuit breaker, a second miniature circuit breaker, a third miniature circuit breaker, a fourth miniature circuit breaker, and a fifth miniature circuit breaker, respectively equipped with... Figure 1 Chinese QA1, QA2, QA3, QA4, QA5;

[0054] The first miniature circuit breaker QA1 is connected in series in the circuit between the first switching power supply 1 and the first UPS power supply 5.

[0055] The second miniature circuit breaker QA2 is connected in series in the circuit between the second switching power supply 2 and the second UPS power supply 6.

[0056] The third miniature circuit breaker QA3 is connected in series in the circuit between the first switching power supply 1 and the coil 301 of the DC contactor.

[0057] The fourth miniature circuit breaker QA4 is connected in series in the circuit between the second switching power supply 2 and the normally closed contact 303 of the DC contactor.

[0058] The fifth miniature circuit breaker, QA5, is located between the DC motor control unit 3 and the normally open contact 302 of the DC contactor. The miniature circuit breaker can disconnect the circuit for replacement or maintenance of equipment within it.

[0059] Under normal circumstances, the first switching power supply 1 and the second switching power supply 2 operate normally, supplying power to the DC motor 4 and controlling the start and stop of the DC emergency oil pump via a DC contactor. When the first switching power supply 1 fails, the DC contactor automatically switches the normally open contact 302 and normally closed contact 303 to switch the power supply to the second switching power supply 2 to stably supply power to the DC motor 4, thereby controlling the start and stop of the DC emergency oil pump and ensuring that the emergency DC oil pump automatically starts after a mains power failure. Specifically, under normal circumstances, when the DC contactor is energized, the normally open contact 302 is closed, the normally closed contact 303 is open, and the first switching power supply 1 supplies power. After the first switching power supply 1 fails, the DC contactor has no current (power off), the normally open contact 302 opens, disconnecting the first switching power supply 1, and the normally closed contact 303 closes, allowing the second switching power supply 2 to supply power. The DC contactor does not affect the power supply to the load, and the faulty switching power supply can be replaced in time without affecting the operation of the device, thus improving the reliability of the power supply. The overall circuit structure is simple, occupies little space, does not require a dedicated DC power supply panel and battery pack, reducing costs, and is convenient to use and maintain.

[0060] Example 2

[0061] This embodiment is basically the same as the above embodiment, except that: a miniature air switch 7 or a fuse 8 is connected in series in the circuit of the DC contactor coil 301, as shown below. Figure 2 and Figure 3 As shown;

[0062] During system operation, the miniature air switch 7 is closed. When system testing is required, it can be opened to simulate a fault state of the first power supply 1. With no current in the DC contactor circuit, the normally open contact 302 opens, disconnecting the first power supply 1. The DC contactor and the first power supply 1 then form a circuit, and the normally closed contact 303 closes, supplying power to the second power supply 2 for testing. Alternatively, the second power supply 2 can be discharged to calibrate its charge. Furthermore, the opening and closing of the miniature air switch 7 allows for manual switching between the first and second power supplies 1 and 2, better meeting user needs. The same functions and effects can also be achieved using the fuse 8. Additionally, during maintenance, the opening and closing of the contacts via the miniature air switch 7 ensures safety during maintenance or insulation testing of the DC motor 4.

[0063] Example 3

[0064] This embodiment is basically the same as the above embodiment, except that the self-switching intelligent power system also includes a data acquisition module, a data processing module and a data analysis module.

[0065] The data acquisition module is used to acquire the status information of the power supply; the status information includes, but is not limited to: operating status, voltage, current, power, frequency, and temperature; the power supply includes one or more of the following: first switching power supply 1, second switching power supply 2, first UPS power supply 5, and second UPS power supply 6.

[0066] The data processing module is used to preprocess the status information, including: data cleaning, removing invalid, erroneous or duplicate data; data correction, correcting data deviations caused by sensor errors; and data fusion, merging data from multiple sensors to improve data reliability and integrity.

[0067] The data analysis module is used to analyze the preprocessed status data and assess the probability of power supply failure.

[0068] Specifically, if the working state is active, voltage, current, power, frequency, and temperature are used as inputs to construct a neural network model to obtain a fault probability assessment value.

[0069] The neural network model is used to generate a fault probability assessment value based on the state information. The neural network model is a backpropagation (BP) neural network. The BP neural network model is used to predict the probability of future faults. Specifically, a three-layer BP neural network model is first constructed, including an input layer, hidden layers, and an output layer. In this embodiment, voltage, current, power, frequency, and temperature are used as inputs, therefore the input layer has 5 nodes. The output is the probability of a fault occurring based on this state information, therefore it has 1 node. For the hidden layer, this embodiment uses the following formula to determine the number of hidden layer nodes: Where l is the number of nodes in the hidden layer, n is the number of nodes in the input layer, m is the number of nodes in the output layer, and a is a number between 1 and 10, which is taken as 6 in this embodiment, so there are 9 nodes in the hidden layer. Backpropagation (BP) neural networks typically use the sigmoid differentiable function and linear functions as the network's activation functions. This paper selects the sigmoid tangent function (tansig) as the activation function for the hidden layer neurons. The prediction model selects the sigmoid logarithmic function (tansig) as the activation function for the output layer neurons. After the BP network model is constructed, the failure probability generated from historically collected state information, i.e., the failure scenarios, is used as samples to train the model. The resulting model can achieve relatively accurate results.

[0070] The data acquisition module, data processing module, and data analysis module analyze and predict the power supply, making it easier to anticipate the possibility of failure and take preventative measures to reduce losses and impacts. The data analysis module uses a BP neural network model for analysis, enabling accurate predictive analysis. By combining multiple indicators, it effectively improves the accuracy and comprehensiveness of the analysis.

[0071] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A self-switching intelligent power supply system for supplying power to a DC motor, characterized in that, include: First switching power supply, second switching power supply, and DC contactor; The first and second switching power supplies are connected to different power sources, and both are connected to the DC motor. A DC contactor is connected to a DC motor and is used to control the DC motor to connect to a first switching power supply or a second switching power supply. It includes: a coil, normally open contacts, and normally closed contacts. The first switching power supply and the DC motor are connected in series, and the normally open contact is connected in series with the first switching power supply and located between the first switching power supply and the DC motor; the coil is located between the normally open contact and the first switching power supply. The second switching power supply is connected in series with the DC motor and the normally closed contact, and is located between the normally open contact and the DC motor.

2. The self-switching intelligent power supply system according to claim 1, characterized in that, The normally closed contact and normally open contact are both two interlocked contacts, which are respectively set on the two wires of the corresponding series circuit.

3. The self-switching intelligent power supply system according to claim 1, characterized in that, The power supply includes: a first UPS power supply and a second UPS power supply; The first UPS power supply is connected in series with the first switching power supply, and the second UPS power supply is connected in series with the second switching power supply.

4. The self-switching intelligent power supply system according to claim 3, characterized in that, Also includes: Several miniature circuit breakers; Miniature circuit breakers are installed in the circuits at both ends of the first and second switching power supplies for circuit protection and fault repair.

5. The self-switching intelligent power supply system according to claim 4, characterized in that, The miniature circuit breaker includes: a first miniature circuit breaker, a second miniature circuit breaker, a third miniature circuit breaker, and a fourth miniature circuit breaker; The first miniature circuit breaker is connected in series in the circuit between the first switching power supply and the first UPS power supply; The second miniature circuit breaker is connected in series in the circuit between the second switching power supply and the second UPS power supply. The third miniature circuit breaker is connected in series in the circuit between the first switching power supply and the coil. The fourth miniature circuit breaker is connected in series in the circuit between the second switching power supply and the normally closed contact of the DC contactor.

6. The self-switching intelligent power supply system according to claim 5, characterized in that, Also includes: DC motor control unit; The DC motor control unit is located between the DC contactor and the DC motor, and is used to control the starting and stopping of the DC motor.

7. The self-switching intelligent power supply system according to claim 6, characterized in that, The miniature circuit breaker also includes: a fifth miniature circuit breaker; The fifth miniature circuit breaker is located between the DC motor control unit and the normally open contact.

8. The self-switching intelligent power supply system according to claim 1, characterized in that, The coil circuit of the DC contactor is connected in series with a miniature air switch or fuse.

9. The self-switching intelligent power supply system according to claim 1, characterized in that, Also includes: Data acquisition module, data processing module, and data analysis module; The data acquisition module is used to collect power supply status information; The data processing module is used to preprocess the status information. The data analysis module is used to analyze the preprocessed status data and assess the probability of power supply failure.

10. The self-switching intelligent power supply system according to claim 9, characterized in that, The status information includes: operating status, voltage, current, power, frequency, and temperature; During the data analysis module's analysis process, if the working status is active, voltage, current, power, frequency, and temperature are used as inputs to construct a neural network model to obtain a fault probability assessment value.

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