CN114356842A - Frequency converter and control system thereof - Google Patents

Abstract

The invention discloses a control system applied to a frequency converter, which adopts two control chips, wherein the two control chips can transmit data required by the other side to the other side through a data transmission device, the first control chip specially processes related data of external equipment connected with the first control chip, the second control chip specially processes related data of a driving control device connected with the second control chip, so that the core driving control work can be carried out, the processing of the related data of the external equipment and the related data of the driving control can be more efficient through the processing of a special chip, and the user experience is improved. The invention also discloses a frequency converter, which has the same beneficial effects as the control system applied to the frequency converter.

Description

A frequency converter and its control system

technical field

The present invention relates to the field of frequency converters, in particular to a control system applied to frequency converters, and also to a frequency converter.

Background technique

In the control system currently used in the inverter, usually only a single-chip design is used. This only chip needs to process many types of data, which not only contains a large amount of data involved in the drive control work of the inverter core, but also contains additional data. type, which reduces the efficiency of data processing and affects the user experience.

Therefore, how to provide a solution to the above technical problem is a problem that those skilled in the art need to solve at present.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a control system applied to a frequency converter, which can make the processing of external device related data and drive control related data more efficient through the processing of special chips, and improve user experience; another purpose of the present invention is Provided is a frequency converter including the above-mentioned control system applied to the frequency converter. Through the processing of the special chip, the processing of the related data of the external device and the related data of the driving control can be made more efficient, and the user experience can be improved.

In order to solve the above-mentioned technical problems, the present invention provides a control system applied to a frequency converter, comprising:

The first control chip is used to connect an external device and process the first related data of the external device connected to itself, and send the first related data required by the second control chip to the second control chip through a data transmission device chip;

the data transmission device respectively connected with the first control chip and the second control chip, and used as a data transmission bridge between the first control chip and the second control chip;

The second control chip is used to connect the drive control device and process the second related data of the drive control device connected to itself, and transmit the second related data required by the first control chip through the data The device is sent to the first control chip.

Preferably, the first control chip includes:

The first chip body is used for processing related data of the external device connected to itself, and sending the first related data required by the second control chip to the second control chip through a data transmission device;

The first end is used to connect with an external device, and the second end is connected to the peripheral interface of the first chip body;

a power port connected to the first chip body;

a first buffer device with a first end connected to the first chip body and a second end connected to the first end of the data transmission device, used for sending the first chip body to the second chip body data is cached;

The control system applied to the frequency converter also includes:

The first end is connected to the power port, and the second end is used to connect the power isolation chip of the power source, and is used to control the circuit breaker when the specified power parameter of the first chip body and/or the power source is greater than the preset value .

Preferably, the second control chip includes:

The second chip body is used to process the relevant data of the driving control device connected to itself, and send the relevant data of the driving control device required by the first control chip to the first control device through the data transmission device control chip;

The first end is used for connecting with the drive control device, and the second end is connected with the data interface of the second chip body;

The first end is connected to the second chip body, and the second end is connected to the second end of the data transmission device. The second buffer device is used for sending the second chip body to the first chip body data is cached.

Preferably, both the first cache device and the second cache device include a first cache module in the form of hardware and a second cache module in the form of software;

The sending of the first relevant data required by the second control chip to the second control chip through a data transmission device is specifically:

When the data amount of the first related data to be sent required by the second control chip currently to be sent is greater than a preset threshold, the data to be sent buffered by the first buffer module of itself will be sent through the data transmission device sent to the second control chip; when the amount of data to be sent is not greater than the preset threshold, the data to be sent buffered by its own second cache module will be transmitted through the data transmission sending the device to the second control chip;

Then, the sending of the second related data required by the first control chip to the first control chip through the data transmission device is specifically:

When the data amount of the second related data to be sent currently required by the first control chip to be sent is greater than the preset threshold, the data to be sent buffered by its own first buffer module will be sent through the The data transmission device sends the data to the first control chip; when the data amount of the data to be sent is not greater than the preset threshold, the data to be sent cached by the second cache module of itself will be sent through the The data transmission device is sent to the first control chip.

Preferably, the control system applied to the frequency converter further includes:

A communication isolator disposed between the data transmission device and the first buffer device or the second buffer device is used for electrical isolation between the first chip body and the second chip body.

Preferably, the first control chip and the second control chip are respectively disposed on a circuit board.

Preferably, the peripheral interface includes a human-computer interaction interface, a remote communication interface, a fan control interface, a temperature sampling interface, a digital output/output interface, and an analog output/output interface.

Preferably, the second control chip is a digital signal processor.

Preferably, the first control chip is a microcontroller.

In order to solve the above technical problems, the present invention also provides a frequency converter, including the control system applied to the frequency converter as described in the foregoing embodiments.

The present invention provides a control system applied to a frequency converter. The control system applied to the frequency converter in the present application adopts two control chips, and the two control chips transmit the data required by the other party to the other party through the data transmission device, And the first control chip specially handles the data related to the external equipment connected to itself, while the second control chip specially handles the relevant data of the drive control device connected to itself, so as to carry out the core drive control work. The processing of external device-related data and drive control-related data is more efficient, improving user experience.

The present invention also provides a frequency converter, which has the same beneficial effects as those applied to the control system of the frequency converter.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the prior art and the accompanying drawings required in the embodiments. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic structural diagram of a control system applied to a frequency converter provided by the present invention;

FIG. 2 is a schematic structural diagram of another control system applied to a frequency converter provided by the present invention.

Detailed ways

The core of the present invention is to provide a control system applied to the frequency converter, through the processing of the special chip, the processing of the related data of the external equipment and the related data of the driving control can be processed more efficiently, and the user experience is improved; another core of the present invention is Provided is a frequency converter including the above-mentioned control system applied to the frequency converter. Through the processing of the special chip, the processing of the related data of the external device and the related data of the driving control can be made more efficient, and the user experience can be improved.

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a control system applied to a frequency converter provided by the present invention. The control system applied to the frequency converter includes:

The first control chip 1 is used to connect an external device and process the first related data of the external device connected to itself, and send the first related data required by the second control chip 3 to the second control chip 3 through the data transmission device 2;

The data transmission device 2 respectively connected with the first control chip 1 and the second control chip 3 is used as a data transmission bridge of the first control chip 1 and the second control chip 3;

The second control chip 3 is used to connect the drive control device and process the second related data of the drive control device connected to itself, and send the second related data required by the first control chip 1 to the first control chip through the data transmission device 2 1.

Specifically, considering the above technical problems in the background art, in the embodiment of the present invention, two control chips are provided for the control system applied to the frequency converter, and the data required by the other party is transmitted through the data transmission device 2, wherein the The first control chip 1 is specially used to connect external devices and process the related data of the external devices connected to itself, while the second control chip 3 is specially used to connect the drive control device and process the related data of the drive control device connected to itself, so as to Realize related drive control functions (for example, it can include PWM wave enable, bus voltage and current sampling, and brake buffer control, etc.), due to the clear division of labor between the two control chips, which can improve peripheral related data and drive control devices at the same time. The processing efficiency of the relevant data.

Among them, considering that the data related to the driving control device is usually more important than the data related to the external device, and the amount of data is large, the second control chip 3 with a higher main frequency can be selected, and the first control chip 3 with a lower main frequency can be selected. Chip 1, that is, the main frequency of the first control chip 1 is lower than the main frequency of the second control chip 3, thereby improving cost performance.

Specifically, the communication transmission device may be various types of communication buses, preferably a communication bus with a higher transmission rate may be selected, which is not limited in this embodiment of the present invention.

Specifically, the driving control device may be of various types, for example, a braking device, a driving device, a sampling device, and a storage device, etc., which are not limited in this embodiment of the present invention.

The present invention provides a control system applied to a frequency converter. The control system applied to the frequency converter in the present application adopts two control chips, and the two control chips transmit the data required by the other party to the other party through the data transmission device, And the first control chip specially handles the data related to the external equipment connected to itself, while the second control chip specially handles the relevant data of the drive control device connected to itself, so as to carry out the core drive control work. The processing of external device-related data and drive control-related data is more efficient, improving user experience.

In order to better describe the embodiments of the present invention, please refer to FIG. 2 . FIG. 2 is a schematic structural diagram of another control system applied to a frequency converter provided by the present invention. On the basis of the above embodiment:

As a preferred embodiment, the first control chip 1 includes:

The first chip body 11 is used to process the first related data of the external device connected to itself, and send the first related data required by the second control chip 3 to the second control chip 3 through the data transmission device 2;

The first end is used to connect with an external device, and the second end is connected to the peripheral interface 12 of the first chip body 11;

a power port 13 connected to the first chip body 11;

The first end is connected to the first chip body 11 , and the second end is connected to the first buffer device 15 of the first end of the data transmission device 2 , and is used to process the data to be sent from the first chip body 11 to the second chip body 31 . cache;

The control system applied to the frequency converter also includes:

The first end is connected to the power port 13, and the second end is used to connect the power isolation chip 5 of the power source, for controlling the circuit breaker when the specified power parameter of the first chip body 11 and/or the power source is greater than the preset value.

Specifically, considering that the power supply used by the first control chip 1 is a low-voltage power supply, usually a power supply provided by a high-voltage power after being stepped down by the step-down chip, if the step-down chip works abnormally and outputs a high voltage, the second chip may be damaged. The main body 31, so in the embodiment of the present invention, a power isolation chip 5 is set between the power supply and the first chip body 11, which can control itself when the specified power parameters of the first chip body 11 and/or the power supply are greater than the preset value. The circuit is disconnected, thereby ensuring the safety of the power supply and the second chip body 31 .

Specifically, considering that in some cases the amount of data required by the other chip at a time is large, if the data is not cached at this time, it may lead to data loss. Therefore, in the embodiment of the present invention, the first control chip 1 is used in the first control chip 1. The first buffer device 15 is provided, and the first control chip 1 can use the first buffer device 15 to buffer the data to be sent before sending the data to be sent, thereby reducing the probability of data loss and further improving work efficiency.

The specified electric energy parameter may be set independently, for example, may be voltage or current, which is not limited in this embodiment of the present invention.

As a preferred embodiment, the second control chip 3 includes:

The second chip body 31 is used to process the second related data of the drive control device connected to itself, and send the second related data required by the first control chip 1 to the first control chip 1 through the data transmission device 2;

The first end is used to connect with the drive control device, and the second end is connected to the data interface 32 of the second chip body 31;

The first end is connected to the second chip body 31 , and the second end is connected to the second buffer device 33 of the second end of the data transmission device 2 , and is used for data to be sent from the second chip body 31 to the first chip body 11 . cache.

Specifically, considering that in some cases the amount of data required by the other chip at a time is large, if the data is not cached at this time, it may lead to data loss. Therefore, in the embodiment of the present invention, the first control chip 1 is used in the first control chip 1. The first buffer device 15 is set, and the second buffer device 33 is set in the second control chip 3. Before the two control chips send the data to be sent, the data to be sent can be buffered by the corresponding buffer device, thereby reducing data loss. probability, further improving work efficiency.

As a preferred embodiment, both the first cache device 15 and the second cache device 33 include a first cache module in the form of hardware and a second cache module in the form of software;

Then, sending the first relevant data required by the second control chip 3 to the second control chip 3 through the data transmission device 2 is specifically:

When the amount of data to be sent related to the external device required by the second control chip 3 currently to be sent is greater than the preset threshold, the data to be sent buffered by the first buffer module of the second control chip 3 is sent to the second control chip through the data transmission device 2 2. The control chip 3; when the amount of data to be sent is not greater than the preset threshold, the data to be sent buffered by its own second cache module is sent to the second control chip 3 through the data transmission device 2;

Then, sending the second relevant data required by the first control chip 1 to the first control chip 1 through the data transmission device 2 is specifically:

When the amount of data to be sent related to the drive control device required by the first control chip 1 currently to be sent is greater than the preset threshold, the data to be sent buffered by its own first buffer module is sent to the data transmission device 2 to The first control chip 1 ; when the amount of data to be sent is not greater than the preset threshold, the data to be sent buffered by its own second cache module is sent to the first control chip 1 through the data transmission device 2 .

Specifically, considering that when a small amount of data is cached, the speed of software caching is faster, therefore, both the first chip body 11 and the second chip body 31 in the embodiment of the present invention can determine whether the data volume of the data to be sent is before the cache. If the value is greater than the preset threshold, the first cache module in hardware form can be used if it is greater than the preset threshold value, and the second cache module in software form can be used if it is not greater, so that the work efficiency can be further improved.

The first cache module and the second cache module may be of various types, which are not limited in this embodiment of the present invention.

Specifically, before sending the data to be sent, the first control chip 1 and the second control chip 3 can also set the frame interval time of the data, specifically:

Determine the frame interval time corresponding to the data type of the data to be sent according to the corresponding relationship between the preset data type and the frame interval time;

The control data transmission device 2 transmits the data to be transmitted at the frame interval time.

Among them, in the corresponding relationship between the preset data type and the frame interval time, the number of frame interval times can be set independently. For example, only two frame interval times can be set, including a long frame interval time and a short frame interval time. The present invention implements the The example is not limited here.

As a preferred embodiment, the control system applied to the frequency converter further includes:

The communication isolator 4 disposed between the data transmission device 2 and the first buffer device 15 or the second buffer device 33 is used for electrical isolation between the first chip body 11 and the second chip body 31 .

Specifically, considering that the power supply of the second chip body 31 is usually high-voltage power, in order to further ensure the safety of the first chip body 11 , in the embodiment of the present invention, the first chip body 11 can also be realized by the setting of the communication isolator 4 and electrical isolation between the second chip bodies 31 .

Specifically, the communication isolator 4 may be of various types, for example, may be an optoelectronic isolator or a CMOS (Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductor) digital isolator, etc., which is not limited in this embodiment of the present invention.

As a preferred embodiment, the first control chip 1 and the second control chip 3 are respectively disposed on a circuit board.

Specifically, considering that if the first chip body 11 and the second chip body 31 are arranged on the same circuit board, the circuit board may also transmit the high voltage of the second chip body 31 to the first chip body 11 so as to prevent the It causes damage. Therefore, in the embodiment of the present invention, the first control chip 1 and the second control chip 3 can be respectively disposed on a circuit board, which further ensures the safety of the first chip body 11 .

As a preferred embodiment, the peripheral interface 12 includes a human-computer interaction interface, a remote communication interface, a fan control interface, a temperature sampling interface, a digital output/output interface, and an analog output/output interface.

Specifically, the above-mentioned interfaces can enable the first chip body 11 to be connected to various types of external devices.

Certainly, in addition to these interfaces, the peripheral interface 12 may also be of various other types, which is not limited in this embodiment of the present invention.

As a preferred embodiment, the second control chip 3 is a digital signal processor.

Specifically, the digital signal processor can be of various types, such as an FPGA (Field Programmable Gate Array, Field Programmable Gate Array), which has the advantages of high operating frequency, strong processing capability, and long service life.

Certainly, in addition to the digital signal processor, the second control chip 3 may also be of various other types, which is not limited in this embodiment of the present invention.

As a preferred embodiment, the first control chip 1 is a microcontroller.

Specifically, the microcontroller has the advantages of small size, low cost, and long life.

Specifically, the microcontroller may be of various types, for example, may be an MCU (Microcontroller Unit, micro control unit) or an SOC (System on Chip, system-on-chip), etc., which is not limited in this embodiment of the present invention.

Certainly, in addition to the microcontroller, the first control chip 1 may also be of various other types, which is not limited in this embodiment of the present invention.

The present invention also provides a frequency converter, including the control system applied to the frequency converter as in the foregoing embodiments.

For the introduction of the frequency converter provided by the embodiment of the present invention, please refer to the foregoing embodiment of the control system applied to the frequency converter, which is not limited in the embodiment of the present invention.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these entities or operations. There is no such actual relationship or sequence between operations. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article, or device that includes the element.

The above description of the disclosed embodiments enables any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A control system for a frequency converter, comprising:

the first control chip is used for connecting external equipment, processing first related data of the external equipment connected with the first control chip and sending the first related data required by the second control chip to the second control chip through a data transmission device;

the data transmission device is respectively connected with the first control chip and the second control chip and is used as a data transmission bridge of the first control chip and the second control chip;

the second control chip is used for being connected with a drive control device, processing second related data of the drive control device connected with the second control chip, and sending the second related data required by the first control chip to the first control chip through the data transmission device.

2. The control system applied to the frequency converter according to claim 1, wherein the first control chip comprises:

the first chip body is used for processing first related data of the external equipment connected with the first chip body and sending the first related data required by the second control chip to the second control chip through the data transmission device;

the first end is used for being connected with external equipment, and the second end is connected with the peripheral interface of the first chip body;

a power port connected to the first chip body;

the first cache device is used for caching data to be sent to the second chip body by the first chip body;

the first end is connected with the power port, the second end is used for being connected with a power isolation chip of a power supply, and the power isolation chip is used for controlling the self open circuit when the designated electric energy parameter of the first chip body and/or the power supply is larger than a preset value.

3. The control system applied to the frequency converter according to claim 2, wherein the second control chip comprises:

the second chip body is used for processing relevant data of the drive control device connected with the second chip body and sending the relevant data of the drive control device required by the first control chip to the first control chip through the data transmission device;

the first end of the data interface is used for being connected with the driving control device, and the second end of the data interface is connected with the second chip body;

and the second cache device is used for caching the data to be sent to the first chip body by the second chip body.

4. The control system applied to the frequency converter according to claim 3, wherein the first buffer device and the second buffer device each comprise a first buffer module in a hardware form and a second buffer module in a software form;

the sending the first related data required by the second control chip to the second control chip through the data transmission device specifically includes:

when the data quantity of the first relevant data to be sent, which is required by a second control chip to be sent currently, is larger than a preset threshold value, sending the data to be sent, which is cached by the first cache module of the second control chip, to the second control chip through a data transmission device; when the data volume of the data to be sent is not greater than the preset threshold value, sending the data to be sent, which is cached by the second cache module of the data to be sent, to the second control chip through the data transmission device;

the sending the second related data required by the first control chip to the first control chip through the data transmission device specifically includes:

when the data volume of the second relevant data to be sent, which is required by a first control chip to be sent currently, is greater than the preset threshold, sending the data to be sent, which is cached by the first cache module of the first control chip, to the first control chip through the data transmission device; and when the data volume of the data to be sent is not greater than the preset threshold value, sending the data to be sent, which is cached by the second cache module of the data to be sent, to the first control chip through the data transmission device.

5. The control system for a variable frequency drive according to claim 4, further comprising:

and the communication isolator is arranged between the data transmission device and the first cache device or the second cache device and is used for electrically isolating the first chip body from the second chip body.

6. The control system of claim 5, wherein the first control chip and the second control chip are disposed on a circuit board respectively.

7. The control system applied to the frequency converter according to claim 2, wherein the peripheral interfaces comprise a human-computer interaction interface, a remote communication interface, a fan control interface, a temperature sampling interface, a digital output/output interface and an analog output/output interface.

8. The control system applied to the frequency converter according to any one of claims 1 to 7, wherein the second control chip is a digital signal processor.

9. The control system applied to the frequency converter according to claim 8, wherein the first control chip is a microcontroller.

10. Frequency converter, characterized in that it comprises a control system for a frequency converter according to any one of claims 1 to 9.

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