CN219740234U - High-voltage variable-frequency switching device and electrical equipment with same - Google Patents
High-voltage variable-frequency switching device and electrical equipment with same Download PDFInfo
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- CN219740234U CN219740234U CN202321021147.XU CN202321021147U CN219740234U CN 219740234 U CN219740234 U CN 219740234U CN 202321021147 U CN202321021147 U CN 202321021147U CN 219740234 U CN219740234 U CN 219740234U
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Abstract
The utility model discloses a high-voltage variable frequency switching device and an electrical device with the same, wherein the high-voltage variable frequency switching device comprises: the input end of the frequency converter is connected with a high-voltage power supply through a first high-voltage circuit breaker; the high-voltage variable frequency switching device is configured to enable the motors to be switched between power frequency and variable frequency, and the frequency converter is switchably conducted with one of the motors. According to the high-voltage variable-frequency switching device, the motors can be connected with the high-voltage power supply through the frequency converter so as to realize variable-frequency operation of the motors, and meanwhile, the motors can be directly connected into the high-voltage power supply so as to realize power-frequency operation of the motors, so that the motors can reach the working state intended by a user, and the use requirement of the user is met.
Description
Technical Field
The utility model relates to the technical field of electric technology, in particular to a high-voltage variable-frequency switching device and electric equipment with the same.
Background
In the technical field of industry, the application of a frequency converter in each industry is common, but most of common application forms in the market at present are that one frequency converter drags one motor or one frequency converter drags two motors to control, and corresponding requirements cannot be met in time under the condition that a plurality of motors and other devices need to be operated or redundancy requirements exist.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the high-voltage variable frequency switching device which can enable the electric equipment to reach the working state wanted by a user, thereby meeting the use requirement of the user.
The utility model also provides electrical equipment with the high-voltage variable-frequency switching device.
The high-voltage variable frequency switching device according to the first aspect of the present utility model comprises: the input end of the frequency converter is connected with a high-voltage power supply through a first high-voltage circuit breaker; the high-voltage variable frequency switching device is configured to enable the motors to be switched between power frequency and variable frequency, and the frequency converter is switchably conducted with one of the motors.
According to the high-voltage variable-frequency switching device of the first aspect of the utility model, the motors can be connected with the high-voltage power supply through the frequency converter so as to realize variable-frequency operation of the motors, and meanwhile, the motors can be directly connected into the high-voltage power supply so as to realize power-frequency operation of the motors, so that the motors can reach the working state intended by a user, and the use requirement of the user is met.
According to some embodiments of the utility model, each variable frequency switch comprises a high voltage contactor and an isolating switch connected in series, and the power frequency switch is a second high voltage breaker.
According to some embodiments of the utility model, any two of the plurality of high voltage contactors are electrically interlocked.
According to some embodiments of the utility model, the high voltage contactor and the second high voltage circuit breaker connected to the same motor are electrically interlocked.
According to some embodiments of the utility model, the high-voltage variable frequency switching device further comprises a controller, and the first high-voltage circuit breaker, the high-voltage contactor, the second high-voltage circuit breaker and the motor are all connected with the controller.
According to some embodiments of the utility model, the high-voltage variable frequency switching device further includes a first high-voltage indicating assembly, the first high-voltage indicating assembly includes a capacitive sensor and a display connected in series, the number of the first high-voltage indicating assembly is multiple and is set in one-to-one correspondence with the multiple motors, one end of the first high-voltage indicating assembly is connected between each variable frequency switch and an output end of the variable frequency device, and the other end of the first high-voltage indicating assembly is grounded.
According to some embodiments of the utility model, the high-voltage variable frequency switching device further comprises: the second high-voltage indicating assembly is characterized in that one end of the second high-voltage indicating assembly is connected between the first high-voltage circuit breaker and the high-voltage power supply, and the other end of the second high-voltage indicating assembly is grounded.
According to some embodiments of the utility model, the number of the motors is six.
An electrical apparatus according to a second aspect of the present utility model comprises a high voltage variable frequency switching device according to the above-described first aspect of the present utility model.
According to the electrical equipment of the second aspect of the utility model, by arranging the high-voltage variable frequency switching device according to the first aspect of the utility model, the running state of the electrical equipment can meet the requirements of users, so that the use experience of the users is improved.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
FIG. 1 is a circuit diagram of a high voltage variable frequency switching device according to an embodiment of the present utility model;
FIG. 2 is a flow chart of the high voltage variable frequency switching device motor shown in FIG. 1 entering a variable frequency operating state;
FIG. 3 is a flow chart of the high voltage variable frequency switching device motor shown in FIG. 1 ending the variable frequency operating state;
FIG. 4 is a flow chart of the high voltage variable frequency switching device motor shown in FIG. 1 entering a power frequency operating state;
fig. 5 is a switching-on control loop of the high-voltage variable-frequency switching device according to an embodiment of the utility model.
Reference numerals:
100. a high-voltage variable frequency switching device;
10. a frequency converter;
20. a motor; 21. a variable frequency switch;
30. a second high pressure indicating assembly;
40. a first high pressure indicating assembly.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
A high voltage variable frequency switching apparatus 100 according to an embodiment of the first aspect of the present utility model is described below with reference to fig. 1 to 4.
As shown in fig. 1, a high-voltage variable frequency switching device 100 according to an embodiment of the first aspect of the present utility model includes: a frequency converter 10 and at least three motors 20.
For example, the motors 20 may be three, four, five or six, specifically, the input end of the frequency converter 10 is connected to the high voltage power supply through a first high voltage circuit breaker, each motor 20 is connected to the output end of the frequency converter 10 through a frequency conversion switch 21, and each motor 20 is further connected to the high voltage power supply through a power frequency switch, and the frequency converter 10 is switchably connected to one of the plurality of motors 20.
That is, during the operation of the high-voltage variable frequency switching device 100, the motor 20 may be connected to the high-voltage power supply through the frequency converter 10, and the motor 20 may also be directly connected to the high-voltage power supply.
The frequency converter 10 can change the frequency of the high-voltage power supply and output the frequency to the motor 20, the motor 20 is connected with working power supplies with different frequencies and has different working states, the first high-voltage circuit breaker can control the conduction between the frequency converter 10 and the high-voltage power supply, the frequency conversion switch 21 can control the conduction between the motor 20 and the frequency converter 10, and the power frequency switch can control the conduction between the motor 20 and the high-voltage power supply.
In the use process of the high-voltage variable frequency switching device 100, the plurality of motors 20 can be conducted with the frequency converter 10 through the variable frequency switch 21, the frequency converter 10 is conducted with the high-voltage power supply through the first high-voltage circuit breaker, and the motors 20 are driven to operate under the dragging of the frequency converter 10, so that the high-voltage power supply is driven to operate by the motor 20 through the frequency converter 10.
When the motor 20 is connected to the high-voltage power supply through the inverter 10, the motor 20 operates in an inverter operation state; when the motor 20 is directly connected to the high voltage power supply, the motor 20 operates in a power frequency operating state.
In the process of using by a user, the user can lead the motor 20 to be conducted with the high-voltage power supply through the variable-frequency switch 21, the high-voltage power supply is conducted with the motor 20 after the frequency of the high-voltage power supply is changed by the variable-frequency switch 10 so that the motor 20 can operate in a variable-frequency working state, meanwhile, the user can also lead the motor 20 to be directly conducted with the high-voltage power supply through the power-frequency switch, and the motor 20 can operate in a power-frequency working state, so that the electric equipment can reach the working state set by the user, and the use requirement of the user is met.
According to the high-voltage variable frequency switching device 100 of the first aspect of the embodiment of the present utility model, the plurality of motors 20 may be connected to the high-voltage power supply through the frequency converter 10 to realize variable frequency operation of the motors 20, and meanwhile, the plurality of motors 20 may also be directly connected to the high-voltage power supply to realize power frequency operation of the motors 20, so that the plurality of motors 20 all reach the working state desired by the user, and the use requirement of the user is met.
In some embodiments of the present utility model, as shown in fig. 1, each variable frequency switch 21 includes a high voltage contactor and a disconnecting switch connected in series, and the power frequency switch is a second high voltage circuit breaker. Wherein, the high-voltage contactor of establishing ties is convenient for realize automatic control, can increase the degree of automation of high-voltage frequency conversion auto-change over device 100, and isolator can improve the security of high-voltage frequency conversion auto-change over device 100 operation in-process, and the outage ability of second high-voltage circuit breaker is stronger, can be faster when breaking down cut off the electric current, further improves the security of high-voltage frequency conversion auto-change over device 100 operation in-process.
In some embodiments of the utility model, any two of the plurality of high voltage contactors are electrically interlocked. In this way, only one of the plurality of high-voltage contactors is at most in a closed state, so that the frequency converter 10 is only conducted with one of the plurality of motors 20, and the safety of the high-voltage frequency conversion switching device 100 in the operation process is further improved.
In some embodiments of the present utility model, the high voltage contactor and the second high voltage circuit breaker connected to the same motor 20 are electrically interlocked. Therefore, only one high-voltage contactor and one second high-voltage breaker connected with the same motor 20 are in a closed state at most, so that the motor 20 can be connected with a high-voltage power supply only through the frequency converter 10 or directly connected with the high-voltage power supply, and the safety of the working process of the high-voltage frequency conversion switching device 100 is further improved.
In some embodiments of the present utility model, the high voltage variable frequency switching apparatus 100 further includes a controller, and the first high voltage circuit breaker, the high voltage contact breaker, and the second high voltage circuit breaker are all connected to the controller. The controller can monitor the states of the first high-voltage circuit breaker, the high-voltage contact breaker and the second high-voltage circuit breaker, and control the opening and closing of the first high-voltage circuit breaker, the high-voltage contact breaker and the second high-voltage circuit breaker, so that the intelligent degree of the high-voltage variable-frequency switching device 100 is improved, and the use experience of a user is further improved.
In some embodiments of the present utility model, as shown in fig. 1, the high-voltage variable frequency switching device 100 further includes a first high-voltage indicating assembly 40, where the first high-voltage indicating assembly 40 includes a capacitive sensor and a display connected in series, the first high-voltage indicating assembly 40 is plural and is disposed in one-to-one correspondence with the plural motors 20, one end of the first high-voltage indicating assembly 40 is connected between each variable frequency switch 21 and an output end of the frequency converter 10, and the other end of the first high-voltage indicating assembly 40 is grounded.
When the motor 20 is in the variable frequency operation state, the voltage will act on the first high voltage indicating component 40 to light the display, so that the user can obtain the operation state of the motor 20, and the safety and the use experience in the use process of the user are improved. Preferably, the capacitance sensor may be a high-voltage insulator type capacitance sensor, so as to further improve the safety performance of the high-voltage variable frequency switching device 100.
In some embodiments of the present utility model, as shown in fig. 1, the high-voltage variable frequency switching device 100 further includes: and one end of the second high-voltage indicating assembly 30 is connected between the first high-voltage circuit breaker and the high-voltage power supply, and the other end of the second high-voltage indicating assembly 30 is grounded. When the frequency converter 10 is conducted with the high-voltage power supply, the voltage acts on the second high-voltage indicating assembly 30 to light the display, so that a user can obtain the working state of the frequency converter 10, and the safety and the use experience of the user in the use process are improved.
In some embodiments of the present utility model, as shown in fig. 1-4, the number of motors 20 is six. When the high-voltage variable frequency switching device 100 works, one of the six motors 20 can be conducted with the high-voltage power supply through the frequency converter 10 to operate in a variable frequency working state, and the other five motors can be directly conducted with the high-voltage power supply to operate in a power frequency working state.
When the motor 20 which is conducted with the high voltage power supply through the frequency converter 10 fails, the motor 20 which is conducted with the high voltage power supply through the frequency converter 10 can be switched and operated in a variable frequency operation state, and when the motor 20 which is directly conducted with the high voltage power supply fails, the rest of the motors 20 can also be directly conducted with the high voltage power supply to operate in an operation state, so that the influence of the motor 20 failure on the operation process of the high voltage variable frequency switching device 100 can be reduced.
An electrical apparatus according to an embodiment of the second aspect of the present utility model includes the high voltage variable frequency switching device 100 according to the embodiment of the first aspect of the present utility model described above.
According to the electrical equipment of the second aspect of the embodiment of the present utility model, by setting the high-voltage variable frequency switching device 100 according to the first aspect of the embodiment of the present utility model, the operation state of the electrical equipment can meet the user requirement, so that the use experience of the user is improved.
A specific embodiment of a high voltage variable frequency switching apparatus 100 according to the present utility model is described below with reference to fig. 1-4.
As shown in fig. 1, the high-voltage variable frequency switching device 100 includes: a controller, a frequency converter 10, a first high voltage breaker QF, a second high voltage indicating assembly 30;
a 1# motor 20, a high voltage contact KM1, a disconnecting switch QS1, a second high voltage breaker 1QF, a 1# first high voltage indicating assembly 40;
a motor # 2 20, a high voltage contactor KM2, a disconnector QS2, a second high voltage breaker 2QF, a first high voltage indication assembly # 2;
a 3# motor 20, a high voltage contactor KM3, a disconnecting switch QS3, a second high voltage breaker 3QF, a 3# first high voltage indication assembly 40;
a 4# motor 20, a high voltage contactor KM4, a disconnector QS4, a second high voltage breaker 4QF, a 4# first high voltage indication assembly 40;
a 5# motor 20, a high voltage contactor KM5, a disconnecting switch QS5, a second high voltage breaker 5QF, a 5# first high voltage indication assembly 40;
a 6# motor 20, a high voltage contactor KM6, a disconnector QS6, a second high voltage breaker 6QF, a 6# first high voltage indication assembly 40.
Specifically, the circuit arrangement of the motor 20 in conduction with the high-voltage power supply through the inverter 10 is as follows:
the first high-voltage circuit breaker is connected between the input end of the frequency converter 10 and the high-voltage power supply; one end of the second high-voltage indicating assembly 30 is connected between the input end of the frequency converter 10 and the high-voltage power supply, and the other end is grounded; the isolating switch QS1 and the high-voltage contactor KM1 are connected between the No. 1 motor 20 and the output end of the frequency converter 10; one end of the 1# first high-voltage indicating component 40 is connected between the isolating switch QS1 and the output end of the frequency converter 10, and the other end is grounded;
the isolating switch QS2 and the high-voltage contactor KM2 are connected between the motor 20 of the No. 2 and the output end of the frequency converter 10, and one end of the first high-voltage indicating component 40 of the No. 2 is connected between the isolating switch QS2 and the output end of the frequency converter 10, while the other end is grounded;
the isolating switch QS3 and the high-voltage contactor KM3 are connected between the 3# motor 20 and the output end of the frequency converter 10, and one end of the 3# first high-voltage indicating assembly 40 is connected between the isolating switch QS3 and the output end of the frequency converter 10, while the other end is grounded;
the isolating switch QS4 and the high-voltage contactor KM4 are connected between the 4# motor 20 and the output end of the frequency converter 10, and one end of the 4# first high-voltage indicating assembly 40 is connected between the isolating switch QS4 and the output end of the frequency converter 10, while the other end is grounded;
the isolating switch QS5 and the high-voltage contactor KM5 are connected between the No. 5 motor 20 and the output end of the frequency converter 10, and one end of the No. 5 first high-voltage indicating assembly 40 is connected between the isolating switch QS5 and the output end of the frequency converter 10, while the other end is grounded;
the isolating switch QS6 and the high-voltage contactor KM6 are connected between the 6# motor 20 and the output terminal of the frequency converter 10, and one end of the 6# first high-voltage indicating assembly 40 is connected between the isolating switch QS6 and the output terminal of the frequency converter 10, while the other end is grounded.
The wiring of the motor 20 directly connected to the high voltage power supply is arranged as follows:
the second high voltage breaker 1QF is connected between the # 1 motor 20 and the high voltage power supply;
the second high voltage breaker 2QF is connected between the # 2 motor 20 and the high voltage power supply;
the second high voltage breaker 3QF is connected between the 3# motor 20 and the high voltage power supply;
the second high voltage breaker 4QF is connected between the 4# motor 20 and the high voltage power supply;
the second high voltage breaker 5QF is connected between the 5# motor 20 and the high voltage power supply;
the second high voltage breaker 6QF is connected between the 6# motor 20 and the high voltage power supply.
Wherein, the normally open contacts of the high-voltage contactor KM1, the high-voltage contactor KM2, the high-voltage contactor KM3, the high-voltage contactor KM4, the high-voltage contactor KM5 and the high-voltage contactor KM6 are connected in series to realize electric interlocking between every two. The second high-voltage circuit breaker 1QF and the high-voltage contactor KM1 are electrically interlocked, the second high-voltage circuit breaker 2QF and the high-voltage contactor KM2 are electrically interlocked, the second high-voltage circuit breaker 3QF and the high-voltage contactor KM3 are electrically interlocked, the second high-voltage circuit breaker 4QF and the high-voltage contactor KM4 are electrically interlocked, the second high-voltage circuit breaker 5QF and the high-voltage contactor KM5 are electrically interlocked, and the second high-voltage circuit breaker 6QF and the high-voltage contactor KM6 are electrically interlocked.
The following describes the operation of the motor 20 in the variable frequency operation state and the power frequency operation state by taking the motor 20 # 1 as an example.
In the non-operating state, the first high-voltage breaker QF, the disconnecting switch QS1, the high-voltage contactor KM1, and the second high-voltage breaker 1QF are all in the open state.
As shown in fig. 2 and 5, when the 1# motor 20 needs to operate in the variable frequency operation state, the isolating switch QS1 is first manually switched on, then the controller detects the states of the frequency converter 10, the high-voltage contact KM1 and the second high-voltage circuit breaker 1QF, when the second high-voltage circuit breaker 1QF is in the opening state, the high-voltage contact KM1 is in an electrical interlocking state in series with normally open contacts of other high-voltage contacts, the controller controls the frequency converter 10 to send a switching-on permission instruction, the high-voltage contact KM1 is switched on first and then the first high-voltage circuit breaker QF is switched on to enable the 1# motor 20 to be conducted through the frequency converter 10 and the high-voltage power supply, and the 1# first high-voltage indication assembly 40 is turned on, and the high-voltage power supply drives the 1# motor 20 to operate in the variable frequency operation state through the frequency converter 10.
As shown in fig. 3, when the 1# motor 20 ends the variable frequency operation state, the frequency converter 10 and the 1# motor 20 are first ended in the operation state, then the high voltage contactor KM1 is opened, and then the first high voltage breaker QF is opened, whereby the 1# motor 20 ends the operation state, and if the 1# motor 20 needs to be overhauled, the opening disconnecting switch QS1 is opened.
As shown in fig. 4, when the # 1 motor 20 needs to operate in the power frequency operation state:
if the No. 1 motor 20 is in a variable frequency working state, firstly stopping the No. 1 motor 20, then opening the high-voltage contactor KM1, and then closing a second high-voltage breaker 1QF, wherein the No. 1 motor 20 is conducted with a high-voltage power supply and operates in a power frequency working state;
if the No. 1 motor 20 is in a non-working state, the second high-voltage breaker 1QF is directly switched on, and the No. 1 motor 20 is conducted with the high-voltage power supply and operates in a power frequency working state.
Therefore, the frequency conversion working state and the power frequency working state of the No. 1 motor 20 are completed, the frequency conversion working state and the power frequency working state of the other motors 20 can be realized according to the steps, and thus, a user can switch the working state of the motor 20 according to the use requirement in the use process, and the electric equipment can reach the working state set by the user, so that the use requirement of the user is met.
In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A high voltage variable frequency switching device, comprising:
the input end of the frequency converter is connected with a high-voltage power supply through a first high-voltage circuit breaker;
at least three motors, each motor is connected with the output end of the frequency converter through a frequency conversion switch, each motor is also connected with the high-voltage power supply through a power frequency switch,
the high-voltage variable frequency switching device is configured to switch the motor between power frequency and variable frequency, and the variable frequency is switchably conducted with one of the plurality of motors.
2. The high voltage variable frequency switching device of claim 1, wherein each variable frequency switch comprises a high voltage contactor and an isolating switch in series, and the power frequency switch is a second high voltage circuit breaker.
3. The high voltage variable frequency switching device of claim 2 wherein any two of the plurality of high voltage contactors are electrically interlocked.
4. The high voltage variable frequency switching device of claim 2 wherein the high voltage contactor and the high voltage circuit breaker connected to the same motor are electrically interlocked.
5. The high voltage variable frequency switching device of claim 2, further comprising a controller, wherein the first high voltage circuit breaker, the high voltage contactor, the second high voltage circuit breaker, and the motor are all connected to the controller.
6. The high-voltage variable frequency switching device according to claim 1, further comprising a first high-voltage indicating assembly comprising a capacitive sensor and a display connected in series, the first high-voltage indicating assembly being plural in number and disposed in one-to-one correspondence with the plural motors,
one end of the first high-voltage indicating assembly is connected between each variable frequency switch and the output end of the frequency converter, and the other end of the first high-voltage indicating assembly is grounded.
7. The high voltage variable frequency switching device of claim 1, further comprising: the second high-voltage indicating assembly is characterized in that one end of the second high-voltage indicating assembly is connected between the first high-voltage circuit breaker and the high-voltage power supply, and the other end of the second high-voltage indicating assembly is grounded.
8. The high voltage variable frequency switching arrangement as claimed in any one of claims 1 to 7, wherein the number of motors is six.
9. An electrical apparatus comprising a high voltage variable frequency switching device according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321021147.XU CN219740234U (en) | 2023-04-28 | 2023-04-28 | High-voltage variable-frequency switching device and electrical equipment with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321021147.XU CN219740234U (en) | 2023-04-28 | 2023-04-28 | High-voltage variable-frequency switching device and electrical equipment with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219740234U true CN219740234U (en) | 2023-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321021147.XU Active CN219740234U (en) | 2023-04-28 | 2023-04-28 | High-voltage variable-frequency switching device and electrical equipment with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219740234U (en) |
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2023
- 2023-04-28 CN CN202321021147.XU patent/CN219740234U/en active Active
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