CN111181471A - Multi-frequency converter equipment and master-slave control system and method of frequency converter of multi-frequency converter equipment - Google Patents
Multi-frequency converter equipment and master-slave control system and method of frequency converter of multi-frequency converter equipment Download PDFInfo
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- CN111181471A CN111181471A CN202010054036.3A CN202010054036A CN111181471A CN 111181471 A CN111181471 A CN 111181471A CN 202010054036 A CN202010054036 A CN 202010054036A CN 111181471 A CN111181471 A CN 111181471A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/022—Synchronous motors
- H02P25/024—Synchronous motors controlled by supply frequency
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
- H02P5/747—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors mechanically coupled by gearing
Abstract
The application discloses master-slave control system of converter includes: the frequency converter host is used for determining a pulse frequency corresponding to a torque value to be transmitted according to a preset first corresponding relation and outputting the determined pulse frequency to the first frequency converter slave through a high-speed pulse port; and the first frequency converter slave is used for determining a torque value corresponding to the received pulse frequency according to the first corresponding relation and carrying out motor control based on the determined torque value. By applying the scheme of the application, the master-slave control of the high-speed frequency converter can be realized, and special hardware support is not needed, so that the cost of the scheme is lower. The application also provides multi-frequency converter equipment and a master-slave control method of the frequency converter, and the multi-frequency converter equipment and the master-slave control method have corresponding technical effects.
Description
Technical Field
The invention relates to the technical field of motor control, in particular to multi-frequency converter equipment and a master-slave control system and method of a frequency converter of the multi-frequency converter equipment.
Background
For example, when a plurality of motors drive the same load, only the master machine is usually used as a speed loop, a torque command generated by the master machine is sent to each slave machine, and the slave machines control the motors by using the received torque command. The scheme can realize motor load distribution and is beneficial to improving the running performance of the system. Of course, there are other master-slave control schemes, such as the slave performing PID fine adjustment of its own rotation speed according to the torque command transmitted from the master and its own torque feedback. In these master-slave control schemes, the master is typically required to transmit torque commands to the slaves.
In applications where the load changes rapidly, such as high speed double drive crosscuts, servo presses, etc., a cycle of load change may be less than 200ms, which requires synchronous master and slave output, which may result in excessive current flow and may not meet the desired process requirements. That is, the master is required to transmit the torque command to the slave as quickly as possible, so that the slave can immediately respond to the torque command sent by the master and synchronously output the force with the master. At present, the control cycle of the current loop of the high-performance frequency converter can generally reach below 125us, so that the time consumed for the slave to receive the torque command of the host is as close as possible to the control cycle of the current loop, and a little time margin is usually required to be reserved, and the time consumed is generally less than 90% of the execution cycle of the current loop to ensure that the latest data can be received in each current loop cycle.
In the current common master-slave data transmission scheme, CAN and 485 communication is commonly used for a low-speed bus, the baud rate is lower than 1Mbps, and the high-speed master-slave application occasion cannot be met. The high-speed bus generally adopts an industrial Ethernet protocol, although the baud rate can reach 100Mbps, the high-speed bus can meet the application occasions of high-speed master-slave. However, at present, there are few manufacturers that can provide such high-speed master-slave frequency converters, mainly foreign manufacturers such as siemens, CT, schneider, ancawa, etc., and these manufacturers all develop autonomous industrial ethernet communication protocols to transmit master-slave data, and can transmit control words, status words, etc. in addition to master-slave data, and are flexible to use. However, the data transmission period is difficult to reach 250us or less due to the requirement of following a complex ethernet protocol, and such a scheme requires special hardware support and is very costly.
In summary, how to realize the master-slave control of the high-speed frequency converter and reduce the hardware cost is a technical problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide multi-frequency converter equipment, a master-slave control system and a master-slave control method of a frequency converter of the multi-frequency converter equipment, so as to realize master-slave control of the high-speed frequency converter and reduce hardware cost.
In order to solve the technical problems, the invention provides the following technical scheme:
a master-slave control system for a frequency converter, comprising:
the frequency converter host is used for determining a pulse frequency corresponding to a torque value to be transmitted according to a preset first corresponding relation and outputting the determined pulse frequency to the first frequency converter slave through a high-speed pulse port;
and the first frequency converter slave is used for determining a torque value corresponding to the received pulse frequency according to the first corresponding relation and carrying out motor control based on the determined torque value.
Preferably, the range of the pulse frequency in the first correspondence relationship is [ a, B ]; wherein A is a lower limit value of the pulse frequency, B is an upper limit value of the pulse frequency, and the pulse period of the lower limit value A of the pulse frequency is lower than the upper limit of the preset current loop control period.
Preferably, the upper limit of the control period of the current loop is 125us, A is 10KHz, and B is 50 KHz.
Preferably, the first frequency converter slave is further configured to:
when the received pulse frequency is less than or equal to a preset disconnection alarm frequency threshold value, performing fault alarm of master-slave disconnection;
the preset disconnection warning frequency threshold value is a numerical value which is greater than or equal to 0 and smaller than the pulse frequency lower limit value in the first corresponding relation.
Preferably, the first frequency converter slave machine is further configured to implement start-stop control and fault interlocking through a standard IO port.
Preferably, the frequency converter further comprises a second frequency converter slave;
the frequency converter master machine is also used for outputting the determined pulse frequency to the second frequency converter slave machine through a high-speed pulse port;
and the second frequency converter slave machine is used for determining a second corresponding torque value corresponding to the received pulse frequency according to a preset second corresponding relation and carrying out motor control based on the determined second corresponding torque value.
Preferably, the high-speed pulse port is a high-speed pulse port with high interference resistance.
A master-slave control method of a frequency converter comprises the following steps:
the frequency converter host determines a pulse frequency corresponding to a torque value to be transmitted according to a preset first corresponding relation, and outputs the determined pulse frequency to the first frequency converter slave through a high-speed pulse port;
and the first frequency converter slave machine determines a torque value corresponding to the received pulse frequency according to the first corresponding relation, and performs motor control based on the determined torque value.
Preferably, the method further comprises the following steps:
when the pulse frequency received by the first frequency converter slave machine is less than or equal to a preset disconnection alarm frequency threshold value, performing fault alarm of master-slave disconnection;
the preset disconnection warning frequency threshold value is a numerical value which is greater than or equal to 0 and smaller than the pulse frequency lower limit value in the first corresponding relation.
A multi-converter apparatus comprising a master-slave control system of a converter as claimed in any preceding claim.
By applying the technical scheme provided by the embodiment of the invention, the data transmission is carried out without using a complex communication protocol, and the information of the torque value required to be transmitted to the slave is contained in the pulse frequency. Specifically, the frequency converter master determines a pulse frequency corresponding to a torque value to be transmitted according to a preset first corresponding relationship, and outputs the determined pulse frequency to the first frequency converter slave through the high-speed pulse port, so that after the first frequency converter slave receives the pulse frequency, the torque value corresponding to the received pulse frequency can be determined according to the first corresponding relationship. It can be seen that, since the first frequency converter slave machine can determine the torque value according to the received pulse frequency, a complex communication protocol is not needed, so that the time consumed for master-slave control is very short. In addition, the scheme of the application also does not need special hardware support, so that the cost of the scheme is lower.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a master-slave control system of a frequency converter according to the present invention;
FIG. 2 is a schematic structural diagram of a master-slave control system of a frequency converter according to an embodiment of the present invention;
fig. 3 is a flowchart of an implementation of a master-slave control method of a frequency converter according to the present invention.
Detailed Description
The core of the invention is to provide a master-slave control system of the frequency converter, which can realize the master-slave control of the high-speed frequency converter without special hardware support, so that the cost of the scheme is lower.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a master-slave control system of a frequency converter in the present invention, where the master-slave control system of the frequency converter may include:
the frequency converter master 10 is configured to determine a pulse frequency corresponding to a torque value to be transmitted according to a preset first corresponding relationship, and output the determined pulse frequency to the first frequency converter slave 20 through a high-speed pulse port;
and a first inverter slave 20 for determining a torque value corresponding to the received pulse frequency in accordance with the first correspondence relationship and performing motor control based on the determined torque value.
Specifically, the first corresponding relationship needs to be preset, for example, in the preset first corresponding relationship, the range of the pulse frequency is represented as [ a, B ]. Where a is the lower limit value of the pulse frequency and B is the upper limit value of the pulse frequency, and for example, in a preset first correspondence, the torque value is set to range from [ -200%, + 200% ], and when the pulse frequency takes the value of a, the corresponding torque value is-200%, and correspondingly, when the pulse frequency takes the value of B, the corresponding torque value is + 200%. Of course, in other embodiments, there may be other corresponding manners, for example, when the pulse frequency takes the value of a, the corresponding torque value is + 200%, correspondingly, when the pulse frequency takes the value of B, the corresponding torque value is-200%, without affecting the implementation of the present invention, as long as the torque value corresponding to each pulse frequency in the range of the pulse frequency can be determined according to the preset first corresponding relationship.
The values of the pulse frequency lower limit value a and the pulse frequency upper limit value B may be set as needed, and naturally, the larger the interval formed by a and B is, the more favorable the accuracy of the determined torque value is. Of course, the higher the pulse frequency, the higher the hardware requirements. And it can be understood that the magnitude of the pulse frequency may affect the time taken by the first frequency converter to determine the frequency of the received pulse from the computer 20, that is, the time taken by the scheme of the present application to perform the master-slave control of the frequency converter, and therefore, the lower limit value a of the pulse frequency may not be set too low.
Further, in an embodiment of the present invention, in order to ensure high-speed master-slave control, a pulse period of the pulse frequency lower limit value a is lower than a preset current loop control period upper limit. The upper limit of the control period of the current loop described herein refers to the maximum value of the control period allowed by the current loop. As described above, the time taken for the slave to receive the torque of the master is as close as possible to the control period of the current loop, and preferably, the time taken is less than the control period of the current loop and a certain margin is left.
The control period of the current loop of the high-performance frequency converter is generally lower than 125us, so that the upper limit of the control period of the current loop can be 125us, and in a specific embodiment of the invention, the value of a is 10KHz, and the value of B is 50 KHz. That is, the range of the pulse frequency output from the main frequency converter 10 to the first frequency converter slave 20 is 10KHz to 50 KHz.
For example, the pulse frequency output from the frequency converter master 10 to the first frequency converter slave 20 is 10KHz, the pulse period of 10KHz is 100us and is lower than 125us, that is, the first frequency converter slave 20 can determine the frequency of the pulse transmitted by the frequency converter master 10 in 125us, and after determining the frequency, the first frequency converter slave 20 can determine the torque value corresponding to the received pulse frequency according to a first corresponding relationship, for example, when the received pulse frequency is 10KHz, the corresponding torque value is-200%. Of course, when the pulse frequency output from the inverter master 10 to the first inverter slave 20 is higher than 10KHz, the pulse period is shorter, and therefore the first inverter slave 20 can determine the frequency of the pulse transmitted from the inverter master 10 within 125 us.
It should be noted that the highest pulse frequency in this embodiment is 50KHz, which is relatively easy to implement in a circuit, and the high-speed pulse port of the conventional frequency converter can usually meet the hardware requirement of the highest 50KHz, i.e. 50KHz is not too high, which does not increase the hardware cost. Therefore, in this embodiment of the present application, setting A to 10KHz and B to 50KHz facilitates implementation of the scheme.
It should be noted that when the upper limit of the current loop control period is set to 125us, that is, when it is ensured that the first frequency converter slave 20 can determine the frequency of the pulse transmitted by the frequency converter master 10 within 125us, the theoretical minimum value of a may be 8KHz, however, after the first frequency converter slave 20 determines the frequency of the pulse transmitted by the frequency converter master 10, it is necessary to determine a torque value corresponding to the received pulse frequency according to the first corresponding relationship, and 125us is also only the set upper limit of the current loop control period, in practical applications, the actual control period of the current loop may be usually lower than 125us, in order to make the time consumed for the first frequency converter slave 20 to determine the torque value corresponding to the pulse frequency transmitted by the frequency converter master 10 less than the current loop control period and have a certain margin, the lower limit a of the pulse frequency usually does not select the lowest value allowed, but slightly higher than this, for example, 10KHz is suitable in the above embodiment.
After the first frequency converter determines a torque value corresponding to the received pulse frequency from the machine 20, motor control can be performed based on the determined torque value.
It should be noted that, at present, the CPU main frequency of a high-performance frequency converter is relatively high, for example, the CPU main frequency is calculated by a main frequency of 100MHz, and for the highest pulse frequency of 50KHz, the accuracy of frequency output can also reach an accuracy of 0.05% to 50K/100M. Correspondingly, the detection precision of the first frequency converter slave 20 on the pulse frequency is also 0.05%, and it can be seen that the scheme of the application can meet the precision requirement of the master and slave frequency converters for transmitting data. While the error control of the general master-slave torque is within 1 percent, and the influence on the control performance can be ignored.
Further, in an embodiment of the present invention, the first frequency converter slave 20 is further configured to:
when the received pulse frequency is less than or equal to a preset disconnection alarm frequency threshold value, performing fault alarm of master-slave disconnection;
the preset disconnection warning frequency threshold value is a numerical value which is greater than or equal to 0 and smaller than the pulse frequency lower limit value in the first corresponding relation.
In the solution of the present application, in a normal operation state, the pulse frequency received by the first frequency converter slave 20 should be within the range of the pulse frequency in the first corresponding relationship, and when the received pulse frequency is less than or equal to the preset disconnection warning frequency threshold, it indicates that the hardware connection of the master and slave frequency converters is disconnected, that is, a disconnection fault occurs, so the first frequency converter slave 20 of the present application can perform fault warning of master and slave disconnection. The condition of disconnection fault can be found in time, and the condition that the first frequency converter slave machine 20 carries out error adjustment on the torque and the like is avoided.
The line break alarm frequency threshold may be set and adjusted according to actual conditions, and of course, the preset line break alarm frequency threshold should be a value greater than or equal to 0 and smaller than the pulse frequency lower limit value in the first corresponding relationship. For example, when the value of the lower limit value a of the pulse frequency in the first corresponding relationship is 10KHz, the disconnection warning frequency threshold may be selected to be 2KHz, for example, that is, when the pulse frequency received by the first frequency converter slave 20 is less than or equal to 2KHz, it may be determined that a master-slave disconnection fault occurs. Of course, after the master-slave disconnection fault is determined, subsequent processing measures can be set and adjusted according to actual needs, for example, after the master-slave disconnection fault is determined, the first frequency converter slave 20 keeps the torque value at the value before the disconnection fault is determined, so that the torque is prevented from being adjusted by mistake, and for example, the disconnection fault can be reported to an upper computer, and the upper computer suspends the work of each frequency converter.
In the present embodiment, a high-speed pulse port is used because it is necessary to transmit a high-frequency pulse frequency between the inverter master 10 and the first inverter slave 20. The high-speed pulse output port, i.e., HDO port, located on the frequency converter master 10 may be specifically referred to as a high-speed pulse receiving port, i.e., HDI port, located on the first frequency converter slave 20. In practical application, the high-speed pulse port can be a high-speed pulse port with high anti-interference performance, for example, 24V power supply can be adopted, and the high-speed pulse port is good in anti-interference performance, simple and reliable.
Further, in an embodiment of the present invention, the first inverter slave 20 is further configured to implement start-stop control and fault interlock through a standard IO port.
In the foregoing embodiment of the present application, the high-speed pulse port is used to transmit the high-frequency pulse signal, so that the scheme of the present application realizes high-speed master-slave control. Besides the function of acquiring the torque value sent by the master from the slave, other functions of the master and the slave can be realized through other common IO ports. For example, in this embodiment, the first inverter slave 20 can implement start-stop control and fault interlock through a standard IO port. For example, in the embodiment of fig. 2, S1 and COM are both standard IO ports, and the user control system can control the start and stop of the frequency converter master 10 and the first frequency converter slave 20 through the standard IO ports. The fault interlock function of the frequency converter master 10 and the first frequency converter slave 20 is also realized by a standard IO port.
In an embodiment of the present invention, a second frequency converter slave may be further included;
the frequency converter master machine 10 is further used for outputting the determined pulse frequency to the second frequency converter slave machine through the high-speed pulse port;
and the second frequency converter slave machine is used for determining a second corresponding torque value corresponding to the received pulse frequency according to a preset second corresponding relation and carrying out motor control based on the determined second corresponding torque value.
In the foregoing embodiment of the present application, high-speed master-slave control is implemented between the frequency converter master 10 and the first frequency converter slave 20, while in some scenarios, there may be 2 or more slaves, and master-slave control of each slave may also be implemented through a high-speed pulse port. For example, in this embodiment, the second inverter slave may determine a second corresponding torque value corresponding to the received pulse frequency according to a preset second correspondence relationship, and perform motor control based on the determined second corresponding torque value.
It is emphasized that the torque values in the second correspondence may be in the same range as the first correspondence or different, for example, the frequency range in the first correspondence is 10KHz-50KHz, which in turn corresponds to torque values of-200% to + 200%, the frequency range in the second correspondence is 10KHz-50KHz, which in turn corresponds to torque values of-200% to + 150%, for example. For example, if the pulse frequency output from the high-speed pulse port by the main frequency converter 10 is 50KHz, the torque value determined by the first frequency converter slave 20 is + 200%, and the corresponding torque value determined by the second frequency converter slave is + 150%.
By applying the technical scheme provided by the embodiment of the invention, the data transmission is carried out without using a complex communication protocol, and the information of the torque value required to be transmitted to the slave is contained in the pulse frequency. Specifically, the frequency converter master 10 determines a pulse frequency corresponding to a torque value to be transmitted according to a preset first corresponding relationship, and outputs the determined pulse frequency to the first frequency converter slave 20 through the high-speed pulse port, so that after the first frequency converter slave 20 receives the pulse frequency, the torque value corresponding to the received pulse frequency can be determined according to the first corresponding relationship. It can be seen that, since the first frequency converter slave 20 can determine the torque value according to the received pulse frequency, no complex communication protocol is required, so that the time consumed for master-slave control is very short. In addition, the scheme of the application also does not need special hardware support, so that the cost of the scheme is lower.
Corresponding to the above system embodiments, the embodiments of the present invention further provide a master-slave control method for a frequency converter, which can be referred to in correspondence with the above.
Referring to fig. 3, an implementation flow of a master-slave control method of a frequency converter in the present invention includes:
step S301: the frequency converter host determines a pulse frequency corresponding to a torque value to be transmitted according to a preset first corresponding relation, and outputs the determined pulse frequency to the first frequency converter slave through a high-speed pulse port;
step S302: the first inverter slave determines a torque value corresponding to the received pulse frequency in accordance with the first correspondence relationship, and performs motor control based on the determined torque value.
In one embodiment of the present invention, the range of the pulse frequency in the first correspondence is [ a, B ]; wherein A is a lower limit value of the pulse frequency, B is an upper limit value of the pulse frequency, and the pulse period of the lower limit value A of the pulse frequency is lower than the upper limit of the preset current loop control period.
In one embodiment of the present invention, the upper limit of the current loop control period is 125us, A is 10KHz, and B is 50 KHz.
In one embodiment of the present invention, the method further comprises:
when the pulse frequency received by the first frequency converter slave machine is less than or equal to a preset disconnection alarm frequency threshold value, performing fault alarm of master-slave disconnection;
the preset disconnection warning frequency threshold value is a numerical value which is greater than or equal to 0 and smaller than the pulse frequency lower limit value in the first corresponding relation.
In an embodiment of the present invention, the first frequency converter slave is further configured to implement start-stop control and fault interlock through a standard IO port.
In one embodiment of the present invention, the method further comprises:
the frequency converter host outputs the determined pulse frequency to the second frequency converter slave through the high-speed pulse port;
and the second frequency converter slave machine determines a second corresponding torque value corresponding to the received pulse frequency according to a preset second corresponding relation, and performs motor control based on the determined second corresponding torque value.
In one embodiment of the invention, the high-speed pulse port is a high-speed pulse port with high interference immunity.
Corresponding to the embodiments of the above method and system, the embodiment of the present invention further provides a multi-frequency converter device, which may include a master-slave control system of the frequency converter in any of the above embodiments, and may be referred to in correspondence with the above.
Multi-inverter devices are generally applied to applications where load changes are rapid, such as high-speed dual-drive crosscuts, servo presses, etc.
Taking a 300m/min high-speed double-drive transverse cutting machine as an example, through actual measurement, the torque waveform of the first frequency converter slave machine is almost overlapped with the torque waveform of the frequency converter master machine, so that the double-drive high-speed high-precision shearing is realized.
Specifically, assuming that the actual cutting length is 500mm and the linear velocity is 300m/min, the time for cutting a piece of paper is 100ms, that is, every 100ms requires to complete acceleration, constant velocity and deceleration actions, and the torque correspondingly changes from a negative value to a positive value to circulate for a period. According to the scheme, the master-slave torque transmission speed is 125us, so that 800 torque values can be transmitted within 100ms, and the torque of the slave machine of the first frequency converter can be guaranteed to be well tracked with the torque of the master machine of the frequency converter all the time.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention. The principle and the implementation of the present invention are explained in the present application by using specific examples, and the above description of the embodiments is only used to help understanding the technical solution and the core idea of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A master-slave control system for a frequency converter, comprising:
the frequency converter host is used for determining a pulse frequency corresponding to a torque value to be transmitted according to a preset first corresponding relation and outputting the determined pulse frequency to the first frequency converter slave through a high-speed pulse port;
and the first frequency converter slave is used for determining a torque value corresponding to the received pulse frequency according to the first corresponding relation and carrying out motor control based on the determined torque value.
2. A master-slave control system of a frequency converter according to claim 1, characterized in that the range of pulse frequencies in said first correspondence is [ a, B ]; wherein A is a lower limit value of the pulse frequency, B is an upper limit value of the pulse frequency, and the pulse period of the lower limit value A of the pulse frequency is lower than the upper limit of the preset current loop control period.
3. A master-slave control system of a frequency converter according to claim 2, characterized in that the current loop control period upper limit is 125us, a is 10KHz and B is 50 KHz.
4. A master-slave control system of frequency converters according to any of the claims 1 to 3, wherein the first frequency converter slave is further adapted to:
when the received pulse frequency is less than or equal to a preset disconnection alarm frequency threshold value, performing fault alarm of master-slave disconnection;
the preset disconnection warning frequency threshold value is a numerical value which is greater than or equal to 0 and smaller than the pulse frequency lower limit value in the first corresponding relation.
5. The master-slave control system of frequency converters according to claim 1, wherein the first frequency converter slave is further configured to implement start-stop control and fault interlocking through a standard IO port.
6. Master-slave control system of frequency converters according to claim 1, further comprising a second frequency converter slave;
the frequency converter master machine is also used for outputting the determined pulse frequency to the second frequency converter slave machine through a high-speed pulse port;
and the second frequency converter slave machine is used for determining a second corresponding torque value corresponding to the received pulse frequency according to a preset second corresponding relation and carrying out motor control based on the determined second corresponding torque value.
7. A master-slave control system of a frequency converter according to claim 1, characterized in that the high-speed pulse port is a high-speed pulse port with high interference immunity.
8. A master-slave control method of a frequency converter is characterized by comprising the following steps:
the frequency converter host determines a pulse frequency corresponding to a torque value to be transmitted according to a preset first corresponding relation, and outputs the determined pulse frequency to the first frequency converter slave through a high-speed pulse port;
and the first frequency converter slave machine determines a torque value corresponding to the received pulse frequency according to the first corresponding relation, and performs motor control based on the determined torque value.
9. The master-slave control method of the frequency converter according to claim 8, further comprising:
when the pulse frequency received by the first frequency converter slave machine is less than or equal to a preset disconnection alarm frequency threshold value, performing fault alarm of master-slave disconnection;
the preset disconnection warning frequency threshold value is a numerical value which is greater than or equal to 0 and smaller than the pulse frequency lower limit value in the first corresponding relation.
10. A multi-converter device comprising a master-slave control system of a frequency converter according to any of claims 1 to 7.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19626554A1 (en) * | 1996-07-02 | 1998-01-08 | Wagner Andreas | Synchronous independent drive for use in multi-shaft screw extruders |
| CN1477052A (en) * | 2003-01-15 | 2004-02-25 | 上海三菱电梯有限公司 | Permanent magnetic synchronous motor driven automatic escalator and overspeed protection device for automatic pavement |
| CN101126789A (en) * | 2007-09-09 | 2008-02-20 | 山东信通电器有限公司 | Cable break alarm front end device |
| CN101340166A (en) * | 2007-07-06 | 2009-01-07 | 中山大洋电机股份有限公司 | Communication method for electronic commutation motor controller |
| CN201594808U (en) * | 2010-01-11 | 2010-09-29 | 苏州巨联科技有限公司 | Control device for adjusting motor speed |
| CN102111103A (en) * | 2010-04-22 | 2011-06-29 | 广东工业大学 | Alternating-current asynchronous motor frequency converter without speed sensor |
| US20140021279A1 (en) * | 2011-04-04 | 2014-01-23 | Flsmidth A/S | Heavy duty mill |
| CN105356509A (en) * | 2015-12-07 | 2016-02-24 | 杭州江河机电装备工程有限公司 | Lifting machinery matrix type energy feedback transmission system |
| CN106523340A (en) * | 2016-12-26 | 2017-03-22 | 广东艾高装备科技有限公司 | Broken line fault treatment system and method for pressure sensor of variable frequency air compressor |
| CN110120771A (en) * | 2018-02-06 | 2019-08-13 | 中车株洲电力机车研究所有限公司 | A kind of electric machine control system, method and its application |
| CN110190668A (en) * | 2019-05-29 | 2019-08-30 | 北京动力源科技股份有限公司 | A kind of hot standby speed regulation power supply system |
-
2020
- 2020-01-17 CN CN202010054036.3A patent/CN111181471A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19626554A1 (en) * | 1996-07-02 | 1998-01-08 | Wagner Andreas | Synchronous independent drive for use in multi-shaft screw extruders |
| CN1477052A (en) * | 2003-01-15 | 2004-02-25 | 上海三菱电梯有限公司 | Permanent magnetic synchronous motor driven automatic escalator and overspeed protection device for automatic pavement |
| CN101340166A (en) * | 2007-07-06 | 2009-01-07 | 中山大洋电机股份有限公司 | Communication method for electronic commutation motor controller |
| CN101126789A (en) * | 2007-09-09 | 2008-02-20 | 山东信通电器有限公司 | Cable break alarm front end device |
| CN201594808U (en) * | 2010-01-11 | 2010-09-29 | 苏州巨联科技有限公司 | Control device for adjusting motor speed |
| CN102111103A (en) * | 2010-04-22 | 2011-06-29 | 广东工业大学 | Alternating-current asynchronous motor frequency converter without speed sensor |
| US20140021279A1 (en) * | 2011-04-04 | 2014-01-23 | Flsmidth A/S | Heavy duty mill |
| CN105356509A (en) * | 2015-12-07 | 2016-02-24 | 杭州江河机电装备工程有限公司 | Lifting machinery matrix type energy feedback transmission system |
| CN106523340A (en) * | 2016-12-26 | 2017-03-22 | 广东艾高装备科技有限公司 | Broken line fault treatment system and method for pressure sensor of variable frequency air compressor |
| CN110120771A (en) * | 2018-02-06 | 2019-08-13 | 中车株洲电力机车研究所有限公司 | A kind of electric machine control system, method and its application |
| CN110190668A (en) * | 2019-05-29 | 2019-08-30 | 北京动力源科技股份有限公司 | A kind of hot standby speed regulation power supply system |
Non-Patent Citations (3)
| Title |
|---|
| 李方圆: "《变频器行业应用实践》", 31 May 2006 * |
| 第234期: "变频调速主从控制系统在160 t 起重机中的应用", 《应用技术》 * |
| 门洪等: "基于ARM 和FPGA 的全自动拉丝机控制系统设计", 《电子技术应用》 * |
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