CN116760320A - Belt motor system, power balance adjusting method and device and frequency converter - Google Patents
Belt motor system, power balance adjusting method and device and frequency converter Download PDFInfo
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- CN116760320A CN116760320A CN202310757059.4A CN202310757059A CN116760320A CN 116760320 A CN116760320 A CN 116760320A CN 202310757059 A CN202310757059 A CN 202310757059A CN 116760320 A CN116760320 A CN 116760320A
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Classifications
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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
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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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Abstract
The invention discloses a belt motor system, a power balance adjusting method, a device and a frequency converter, wherein the power balance adjusting method comprises the following steps: acquiring a first torque of a first motor and a second torque of a second motor; determining a torque difference between the second motor and the first motor according to the first torque and the second torque; calculating the frequency adjustment quantity of the second motor according to the torque difference; and adjusting the frequency of the second motor according to the frequency adjustment amount. By adopting the technical scheme, the motor power balance control method is applicable to the first motor and the second motor which are different in types, different in control methods and the like and has larger difference, improves compatibility and applicability, can meet the use of different working conditions, simultaneously improves the accuracy and robustness of motor power balance control, can effectively balance the power of the first motor and the power of the second motor, and realizes automatic and reasonable distribution of motor power.
Description
Technical Field
The invention relates to the technical field of motor control, in particular to a belt motor system, a power balance adjusting method, a power balance adjusting device and a frequency converter.
Background
When the objects conveyed by the belt conveyor are heavy or the conveying distance is long, two or more motors are often required to drive the conveying equipment simultaneously. The power balance of two motors is illustrated as an example: when two motors are operated simultaneously, the condition that the motors are not synchronous in operation is easy to occur, at the moment, one motor is in an electric state, the other motor is in a power generation state, the motor in the power generation state consumes energy and is easy to heat, the load of the motor in the electric state is increased, and automatic distribution of power cannot be realized.
Therefore, a control method is needed to reasonably distribute power and realize power balance among motors.
Disclosure of Invention
The invention provides a belt motor system, a power balance adjusting method, a power balance adjusting device and a frequency converter, which are used for reasonably distributing power of motors for driving transmission equipment at the same time.
According to an aspect of the present invention, there is provided a power balance adjustment method including:
acquiring a first torque of a first motor and a second torque of a second motor;
determining a torque difference between the second motor and the first motor according to the first torque and the second torque;
calculating the frequency adjustment amount of the second motor according to the torque difference;
and adjusting the frequency of the second motor according to the frequency adjustment amount.
Optionally, acquiring the first torque of the first motor and the second torque of the second motor includes:
acquiring a first parameter and a first torque current of the first motor, and a second parameter and a second torque current of the second motor;
determining the first torque of the first motor based on the first parameter and the first torque current, and determining the second torque of the second motor based on the second parameter and the second torque current.
Optionally, calculating the frequency adjustment amount of the second motor according to the torque difference includes:
and calculating the frequency adjustment quantity of the second motor according to the torque difference by adopting a PID algorithm.
Optionally, adjusting the frequency of the second motor according to the frequency adjustment amount includes:
calculating a target frequency of the second motor according to the frequency adjustment amount adjustment; the target frequency of the second motor is the sum of the frequency of the first motor and the frequency adjustment amount;
and adjusting the frequency of the second motor to the target frequency.
Optionally, adjusting the frequency of the second motor according to the frequency adjustment amount includes:
calculating a target frequency of the second motor according to the frequency adjustment amount adjustment; the target frequency of the second motor is the sum of the frequency of the first motor and the frequency adjustment amount;
and dynamically adjusting the frequency of the second motor and the second torque current according to the target frequency until the power of the second motor is equal to the power of the first motor.
Optionally, dynamically adjusting the frequency of the second motor and the second torque current according to the target frequency until the power of the second motor is equal to the power of the first motor, including:
changing the frequency of the second motor by a preset frequency increment to reduce the difference between the target frequency and the frequency of the second motor;
and returning to the step of acquiring the first torque of the first motor and the second torque of the second motor until the power of the second motor is equal to the power of the first motor.
According to another aspect of the present invention, there is provided a power balance adjustment apparatus including:
the acquisition module is used for acquiring the first torque of the first motor and the second torque of the second motor;
a torque difference determining module configured to determine a torque difference between the second motor and the first motor according to the first torque and the second torque;
a frequency adjustment amount calculation module for calculating a frequency adjustment amount of the second motor according to the torque difference;
and the adjusting module is used for adjusting the frequency of the second motor according to the frequency adjusting quantity.
Optionally, the adjusting module includes:
the target frequency calculation module is used for calculating the target frequency of the second motor according to the frequency adjustment quantity adjustment; the target frequency of the second motor is the sum of the frequency of the first motor and the frequency adjustment amount;
and the dynamic adjustment module is used for dynamically adjusting the frequency of the second motor and the second torque current according to the target frequency until the power of the second motor is equal to the power of the first motor.
According to another aspect of the present invention, there is provided a frequency converter including the power balance adjustment device described above; the frequency converter can execute the power balance adjustment method.
According to another aspect of the present invention, there is provided a belt motor system comprising a belt, a first motor, a second motor, and the above-described frequency converter.
According to the technical scheme, the first torque of the first motor and the second torque of the second motor are obtained, and the torque difference is determined according to the first torque and the second torque, so that the power balance adjusting method is not limited to similar motors with the same model, the same control method and the like, is applicable to the first motor and the second motor with larger difference in different models, different control methods and the like, compatibility and applicability are improved, the use of different working conditions can be met, meanwhile, the accuracy and the robustness of power balance control of the motors are improved, the power of the first motor and the power of the second motor can be effectively balanced, and automatic and reasonable distribution of the power of the motors is realized.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a power balance adjustment method according to a first embodiment of the present invention;
fig. 2 is a flowchart of a power balance adjustment method according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a power balance adjustment device according to a third embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
Fig. 1 is a flowchart of a power balance adjustment method according to an embodiment of the present invention, where the method may be performed by a power balance adjustment device, and the power balance adjustment device may be implemented in hardware and/or software, and the power balance adjustment device may be configured in a frequency converter. As shown in fig. 1, the method includes:
s110, acquiring a first torque of the first motor and a second torque of the second motor.
The first torque is the magnitude of the rotational force of the first motor, and the second torque is the magnitude of the rotational force of the second motor. The first torque of the first motor and the second torque of the second motor can be directly obtained through the torque sensor, or the first torque and the second torque can be indirectly obtained through information such as parameters, current, voltage and the like of the first motor and the second motor.
The first motor is a host, the second motor is a slave, the host and the slave CAN drive the same belt to transmit articles at the same time, the frequency converter of the host CAN send information of the host to the frequency converter of the slave through CAN communication, for example, the first torque of the host, reference information of the host or the like, the frequency converter of the slave CAN receive the first torque of the host, or information of parameters, current, voltage and the like of the host, calculate the first torque of the host and calculate the second torque of the slave.
It should be noted that, in the embodiment of the present invention, the master machine includes the first motor, the slave machine includes the second motor, the belt motor system is not limited to two motors, and the slave machine of the belt motor system may include a plurality of motors, for example, may include a plurality of second motors, which is not limited in the embodiment of the present invention.
S120, determining a torque difference between the second motor and the first motor according to the first torque and the second torque.
Specifically, the first torque and the second torque are differenced, and the second torque is subtracted from the first torque to obtain a torque difference.
S130, calculating the frequency adjustment quantity of the second motor according to the torque difference.
In the initial state, the frequency of the master and the frequency of the slave are equal, and when the torques of the master and the slave are equal, the frequencies of the master and the slave are also equal. When the torque of the host machine or the slave machine changes, the frequency converter of the slave machine can obtain the torque difference between the slave machine and the host machine, and according to the torque difference, the power difference between the slave machine and the host machine can be obtained, and then the corresponding frequency adjustment quantity can be obtained through calculation, and the frequency and the speed of the slave machine are adjusted through the frequency adjustment quantity, so that the power of the slave machine is equal to the power of the host machine, and the power balance between the host machine and the slave machine is realized. The frequency of the motor is the voltage frequency of the alternating current power supply to the motor, the frequency of the motor is in direct proportion to the speed of the motor, and the larger the frequency is, the larger the speed of the motor is.
Optionally, calculating the frequency adjustment amount of the second motor according to the torque difference includes: and calculating the frequency adjustment quantity of the second motor according to the torque difference by adopting a PID algorithm.
The frequency converter of the slave machine can be used for calculating the PID algorithm to obtain the corresponding frequency adjustment quantity of the slave machine, or the master machine and the slave machine can be connected with the synchronous controller through the frequency converter in a communication manner, or the master machine and the slave machine can be used for calculating the PID algorithm through the synchronous controller or an upper computer of the synchronous controller, and the corresponding frequency adjustment quantity of the slave machine can be obtained through torque difference.
And S140, adjusting the frequency of the second motor according to the frequency adjustment quantity.
Specifically, according to the frequency adjustment amount and the frequency of the slave, the change amount of the frequency of the slave can be determined, so that the frequency of the slave reaches a corresponding level, and the power of the slave is equal to that of the master. The motor power formula is: p=t e ×ω＝T e X (2. Pi.F), where T e The torque of the motor, ω is the angular velocity of the motor, F is the frequency of the motor, the frequency of the slave needs to be larger than the frequency of the master when the torque of the slave is smaller than the torque of the master, so that the power balance of the master and the slave can be realized, and the frequency of the slave needs to be smaller than the frequency of the master when the torque of the slave is larger than the torque of the masterSo that the power of the master and the slave are balanced.
Optionally, adjusting the frequency of the second motor according to the frequency adjustment amount includes: calculating a target frequency of the second motor according to the frequency adjustment amount adjustment; the frequency of the second motor is adjusted to the target frequency.
Wherein the target frequency of the second motor is the sum of the frequency of the first motor and the frequency adjustment amount.
For example, in an ideal situation, the rotational speeds of the master and slave are identical, the torque is the same, and the power is the same. When abnormal states occur, the torque between the master machine and the slave machine is different, the frequency adjustment quantity can be obtained through the torque difference between the master machine and the slave machine, namely the auxiliary quantity which needs to be adjusted by the slave machine is obtained, after the auxiliary quantity is adjusted by the slave machine, even if the torque between the master machine and the slave machine is unequal, the power of the master machine is equal to the power of the slave machine, and the power of the master machine and the power of the slave machine are reasonably distributed. The target frequency is the sum of the frequency of the first motor and the frequency adjustment quantity, namely the sum of the initial frequency of the slave machine and the frequency adjustment quantity.
According to the first embodiment of the invention, the first torque of the first motor and the second torque of the second motor are obtained, and the torque difference is determined according to the first torque and the second torque, so that the power balance adjusting method is not limited to similar motors with the same model, the same control method and the like, is applicable to the first motor and the second motor with larger difference in different models, different control methods and the like, compatibility and applicability are improved, the use of different working conditions can be met, meanwhile, the accuracy and the robustness of power balance control of the motors are improved, the power of the first motor and the power of the second motor can be effectively balanced, and automatic and reasonable distribution of the power of the motors is realized.
In an alternative embodiment, acquiring the first torque of the first motor and the second torque of the second motor includes: acquiring a first parameter and a first torque current of a first motor, and a second parameter and a second torque current of a second motor; a first torque of the first motor is determined based on the first parameter and the first torque current, and a second torque of the second motor is determined based on the second parameter and the second torque current.
The first parameter includes, but is not limited to, parameter information such as pole pair number, flux linkage, etc. of the first motor, and the second parameter includes, but is not limited to, parameter information such as pole pair number, flux linkage, etc. of the second motor. The first parameter information and the second parameter information may be the rated information, the factory information, and the like of the first motor and the second motor stored in advance, or may also be the first parameter of the first motor and the second parameter of the second motor through self-learning Xi Huoqu, which is not limited in this embodiment.
For example, after the parameter information and the torque current of the first motor and the second motor are obtained, the first torque of the first motor and the second torque of the second motor are calculated through a motor torque formula. The motor torque formula is:wherein T is e For motor torque, P is the pole pair number of the motor, < >>Is the flux linkage of the motor, L d Is the d-axis inductance of the motor, L q I is the q-axis inductance of the motor d And i q Is the component of the current vector in the d-axis and q-axis. Wherein the pole pair number P is a fixed parameter of the motor, and can be pre-stored in a frequency converter of a master machine and/or a slave machine, and the magnetic chain is +.>d-axis inductance L d Inductance L of q axis q The parameters can be obtained through self-learning of controllers such as a frequency converter or a same-frequency controller. Thus, the torque current through the motor, flux linkage +.>d-axis inductance L d Inductance L of q axis q Equal information is adopted, the torque of the motor is calculated, the torque is determined only through single information of torque current, the first motor and the second motor are not limited by the same model and control mode, and the problem that the traditional method only can use the first motor with the same model and control mode is brokenThe limitations of one motor and a second motor enhance the ease of use of the power balance adjustment method.
Example two
Fig. 2 is a flowchart of a power balance adjustment method according to a second embodiment of the present invention, and compared with the above embodiment, the present embodiment refines the step of adjusting the frequency of the second motor according to the frequency adjustment amount. As shown in fig. 2, the method includes:
s210, acquiring a first torque of a first motor and a second torque of a second motor.
S220, determining a torque difference between the second motor and the first motor according to the first torque and the second torque.
S230, calculating the frequency adjustment quantity of the second motor according to the torque difference.
S240, calculating the target frequency of the second motor according to the frequency adjustment amount.
Wherein the target frequency of the second motor is the sum of the frequency of the first motor and the frequency adjustment amount;
s250, dynamically adjusting the frequency of the second motor and the second torque current according to the target frequency until the power of the second motor is equal to the power of the first motor.
For example, the target frequency of the second motor and the initial frequency of the second motor may be different greatly, or the target frequency of the second motor and the initial frequency of the second motor may be different less, so that the frequency of the second motor may not be adjusted to the target frequency at a time, and the frequency of the second motor may be finally reached to the target frequency through dynamic adjustment. For example, when the initial frequency of the second motor is much smaller than the target frequency, the frequency of the second motor can be increased by gradually increasing the torque current of the second motor, and after the torque current of the second motor is increased each time, the torque of the second motor is increased according to the motor torque formula, so that the frequency of the second motor is driven to be increased, and at the moment, the difference between the torque of the second motor and the torque of the first motor and the difference between the power of the second motor and the power of the second motor are reduced; then, the torque difference, the frequency adjustment amount, and the target frequency are recalculated, and the torque current and the frequency of the second motor are continuously increased according to the frequency adjustment amount and the target frequency until the power of the second motor is equal to the power of the first motor, that is, the product of the torque and the frequency of the second motor is equal to the product of the torque and the frequency of the first motor.
When the initial frequency of the second motor is smaller than the target frequency and the phase difference is smaller, the torque current of the second motor can be increased, the torque and the frequency of the second motor can be increased, if the frequency of the second motor is larger than the target frequency after one-time adjustment, the product of the torque and the frequency of the second motor is larger than the product of the torque and the frequency of the first motor, the torque difference, the frequency adjustment quantity and the target frequency can be recalculated, the torque current and the frequency of the first motor can be reduced, and the power of the second motor is equal to the power of the first motor.
Therefore, the torque difference between the second motor and the first motor and the difference between the frequency of the second motor and the target frequency can be reduced by changing the torque current and the frequency, so that the difference between the power of the second motor and the power of the second motor is reduced, the first torque of the first motor and the second torque of the second motor, the power of the first motor and the power of the second motor are conveniently adjusted to a dynamic balance state, and the power balance of the motors is realized.
In an alternative embodiment, dynamically adjusting the frequency of the second motor and the second torque current according to the target frequency until the power of the second motor is equal to the power of the first motor includes: changing the frequency of the second motor in preset frequency increments to reduce the difference between the target frequency and the frequency of the second motor; and returning to the step of acquiring the first torque of the first motor and the second torque of the second motor until the power of the second motor is equal to the power of the first motor.
The preset frequency increment refers to a change amount of the frequency of the second motor every time the frequency of the second motor is changed, and the preset frequency increment may be a fixed value determined empirically, or may be a change value, for example, the preset frequency increment may be determined according to a range in which the frequency of the second motor is located, or may be determined according to a magnitude of a torque difference.
For example, when the target frequency of the second motor and the initial frequency of the second motor are greatly different, the frequency of the second motor cannot be adjusted to the target frequency at a time, the frequency of the second motor is changed only by a preset frequency increment at a time, and the preset frequency increment can be increased or decreased by increasing or decreasing the torque current; meanwhile, the second torque of the second motor is increased or reduced according to the torque current, and the torque difference and the power difference of the first motor and the second motor are reduced; and re-acquiring the first torque, the second torque and the torque difference, wherein the torque difference is reduced compared with the previous torque difference, the frequency adjustment quantity is correspondingly reduced, the frequency of the second motor is easier to adjust to the target frequency, the frequency of the second motor and the second torque current are adjusted again, the torque difference and the power difference are reduced, and the power of the second motor can quickly reach a state equal to the power of the first motor.
According to the second embodiment of the invention, the second torque current of the second motor is regulated while the frequency of the second motor is regulated, so that the power of the first motor and the power of the second motor can reach an equilibrium state quickly, the time for regulating the power equilibrium is shortened, the energy loss is reduced, and the first motor and the second motor are protected from being damaged easily; and the phenomenon that the frequency of the second motor is difficult to adjust to the target frequency due to overlarge torque difference can be avoided, the application range of power balance adjustment is improved, and the reliability is improved.
Example III
Fig. 3 is a schematic structural diagram of a power balance adjustment device according to a third embodiment of the present invention.
As shown in fig. 3, the apparatus includes:
an acquisition module 310 for acquiring a first torque of the first motor and a second torque of the second motor;
a torque difference determination module 320 configured to determine a torque difference between the second motor and the first motor based on the first torque and the second torque;
a frequency adjustment amount calculation module 330 for calculating a frequency adjustment amount of the second motor according to the torque difference;
the adjusting module 340 adjusts the frequency of the second motor according to the frequency adjustment amount.
Optionally, the adjusting module 340 includes:
the target frequency calculation module is used for calculating the target frequency of the second motor according to the frequency adjustment quantity; the target frequency of the second motor is the sum of the frequency of the first motor and the frequency adjustment quantity;
and the dynamic adjustment module is used for dynamically adjusting the frequency of the second motor and the second torque current according to the target frequency until the power of the second motor is equal to the power of the first motor.
The power balance adjusting device provided by the third embodiment of the invention can execute the power balance adjusting method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the executing method.
Example IV
The fourth embodiment of the present invention also provides a frequency converter, which includes the power balance adjustment device provided by any embodiment of the present invention, and can execute the power balance adjustment method provided by any embodiment of the present invention.
The frequency converter provided by the embodiment of the invention can regulate the rotating speed and the frequency of the second motor, control the acceleration and the deceleration of the second motor, monitor the load and the working state of the second motor, protect the second motor from overload, high temperature or other faults and the like. The frequency converter CAN calculate the torque of the second motor through the current of the second motor and the feedback signal, and CAN also receive the information of the first motor through CAN communication, so that the torque of the first motor is obtained.
In an alternative embodiment, the frequency converter provided by the embodiment of the invention can also adjust the rotation speed and frequency of the first motor, control the acceleration and deceleration of the first motor, monitor the load and working state of the first motor, protect the first motor from overload, high temperature or other faults, and the like.
According to the fourth embodiment of the invention, the power of the first motor and the power of the second motor can be balanced, so that the power balance is realized, and the power of the first motor and the power of the second motor are reasonably distributed.
Example five
The fifth embodiment of the invention also provides a belt motor system, which comprises a belt, a first motor, a second motor and the frequency converter provided by any embodiment of the invention.
Illustratively, the frequency converter may control the operating states of the first motor and the second motor, which may cooperate via a belt to transport the article.
According to the fifth embodiment of the invention, the power balance of the first motor and the second motor can be realized, the energy consumption is reduced, the articles are transported stably, and the failure rate is reduced.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method of power balance adjustment, comprising:
acquiring a first torque of a first motor and a second torque of a second motor;
determining a torque difference between the second motor and the first motor according to the first torque and the second torque;
calculating the frequency adjustment amount of the second motor according to the torque difference;
and adjusting the frequency of the second motor according to the frequency adjustment amount.
2. The power balance adjustment method of claim 1, wherein obtaining the first torque of the first motor and the second torque of the second motor comprises:
acquiring a first parameter and a first torque current of the first motor, and a second parameter and a second torque current of the second motor;
determining the first torque of the first motor based on the first parameter and the first torque current, and determining the second torque of the second motor based on the second parameter and the second torque current.
3. The power balance adjustment method according to claim 1, characterized in that calculating the frequency adjustment amount of the second motor from the torque difference includes:
and calculating the frequency adjustment quantity of the second motor according to the torque difference by adopting a PID algorithm.
4. The power balance adjustment method according to claim 1, characterized in that adjusting the frequency of the second motor according to the frequency adjustment amount includes:
calculating a target frequency of the second motor according to the frequency adjustment amount adjustment; the target frequency of the second motor is the sum of the frequency of the first motor and the frequency adjustment amount;
and adjusting the frequency of the second motor to the target frequency.
5. The power balance adjustment method according to claim 1, characterized in that adjusting the frequency of the second motor according to the frequency adjustment amount includes:
calculating a target frequency of the second motor according to the frequency adjustment amount adjustment; the target frequency of the second motor is the sum of the frequency of the first motor and the frequency adjustment amount;
and dynamically adjusting the frequency of the second motor and the second torque current according to the target frequency until the power of the second motor is equal to the power of the first motor.
6. The power balance adjustment method of claim 5, wherein dynamically adjusting the frequency of the second motor and the second torque current until the power of the second motor is equal to the power of the first motor according to the target frequency comprises:
changing the frequency of the second motor by a preset frequency increment to reduce the difference between the target frequency and the frequency of the second motor;
and returning to the step of acquiring the first torque of the first motor and the second torque of the second motor until the power of the second motor is equal to the power of the first motor.
7. A power balance adjustment device, comprising:
the acquisition module is used for acquiring the first torque of the first motor and the second torque of the second motor;
a torque difference determining module configured to determine a torque difference between the second motor and the first motor according to the first torque and the second torque;
a frequency adjustment amount calculation module for calculating a frequency adjustment amount of the second motor according to the torque difference;
and the adjusting module is used for adjusting the frequency of the second motor according to the frequency adjusting quantity.
8. The power balance adjustment device of claim 7, wherein the adjustment module comprises:
the target frequency calculation module is used for calculating the target frequency of the second motor according to the frequency adjustment quantity adjustment; the target frequency of the second motor is the sum of the frequency of the first motor and the frequency adjustment amount;
and the dynamic adjusting module is used for adjusting the frequency of the second motor and the second torque current according to the target frequency until the power of the second motor is equal to the power of the first motor.
9. A frequency converter comprising a power balance adjustment device according to any one of claims 7-8; the frequency converter being capable of performing the power balance adjustment method of any one of claims 1-6.
10. A belt motor system comprising a belt, a first motor, a second motor, and the frequency converter of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310757059.4A CN116760320A (en) | 2023-06-26 | 2023-06-26 | Belt motor system, power balance adjusting method and device and frequency converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310757059.4A CN116760320A (en) | 2023-06-26 | 2023-06-26 | Belt motor system, power balance adjusting method and device and frequency converter |
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| CN116760320A true CN116760320A (en) | 2023-09-15 |
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| CN202310757059.4A Pending CN116760320A (en) | 2023-06-26 | 2023-06-26 | Belt motor system, power balance adjusting method and device and frequency converter |
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| Country | Link |
|---|---|
| CN (1) | CN116760320A (en) |
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2023
- 2023-06-26 CN CN202310757059.4A patent/CN116760320A/en active Pending
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