CN110707968A - Control method and system of single-spindle control system and computer storage medium - Google Patents
Control method and system of single-spindle control system and computer storage medium Download PDFInfo
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- CN110707968A CN110707968A CN201910855119.XA CN201910855119A CN110707968A CN 110707968 A CN110707968 A CN 110707968A CN 201910855119 A CN201910855119 A CN 201910855119A CN 110707968 A CN110707968 A CN 110707968A
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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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/06—Arrangements for speed regulation of a single motor wherein the motor speed is measured and compared with a given physical value so as to adjust the motor speed
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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
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/13—Observer control, e.g. using Luenberger observers or Kalman filters
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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
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/22—Current control, e.g. using a current control loop
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Abstract
The application discloses a control method and a system of a single-spindle control system and a computer storage medium, wherein the single-spindle control system comprises a processor and a synchronous motor connected with the processor, the processor comprises a frequency conversion module and a sampling processing module which are connected with each other, and the method comprises the steps of receiving a power supply signal output by the frequency conversion module by using the synchronous motor; sampling a current signal output by a synchronous motor to obtain a first current sampling signal, and processing the first current sampling signal to obtain an exciting current feedback signal and a torque current feedback signal; processing the exciting current feedback signal and the torque current feedback signal by using a sampling processing module to obtain a driving signal; and receiving the driving signal by using the frequency conversion module, and outputting a power supply signal to the synchronous motor so as to enable the speed of the synchronous motor to reach a target speed. Through the mode, the efficiency of the single-spindle control system can be improved by controlling the synchronous motor, and the energy consumption is reduced.
Description
Technical Field
The present application relates to the field of control technologies, and in particular, to a control method and system for a single-spindle control system, and a computer storage medium.
Background
The winding motor is a key device for winding, is widely applied in the industries of metallurgical process production, plastic weaving, cable and wire and the like, and can be divided into a single-spindle asynchronous motor and a torque winding motor according to the types of the motors, and the motors have the common defects that: the efficiency is low, the single-spindle asynchronous motor is a common three-phase asynchronous motor, the standard efficiency is higher than 68.5%, the rated point efficiency of the single-spindle asynchronous motor is about 70%, and the control performance is poor, the control scheme adopted by the single-spindle asynchronous motor is constant Voltage Frequency ratio (VF) control, and the load disturbance resistance and the load carrying capacity are poor.
Disclosure of Invention
The application mainly solves the problem of providing a control method and system of a single-spindle control system and a computer storage medium, which can improve the efficiency of the single-spindle control system and reduce energy consumption by controlling a synchronous motor.
In order to solve the technical problem, the technical scheme adopted by the application is as follows: provided is a control method of a single-spindle control system, the single-spindle control system including: the processor comprises a frequency conversion module and a sampling processing module which are connected with each other, and the method comprises the following steps: receiving a power supply signal output by the frequency conversion module by using the synchronous motor; sampling a current signal output by a synchronous motor to obtain a first current sampling signal, and processing the first current sampling signal to obtain an exciting current feedback signal and a torque current feedback signal; processing the exciting current feedback signal and the torque current feedback signal by using a sampling processing module to obtain a driving signal; and receiving the driving signal by using the frequency conversion module, and outputting a power supply signal to the synchronous motor so as to enable the speed of the synchronous motor to reach a target speed.
In order to solve the above technical problem, another technical solution adopted by the present application is: there is provided a single-spindle control system, comprising: the processor comprises a frequency conversion module and a sampling processing module which are connected with each other, and the synchronous motor is used for receiving a power supply signal output by the frequency conversion module; the processor is used for sampling a current signal output by the synchronous motor to obtain a first current sampling signal, and processing the first current sampling signal to obtain an exciting current feedback signal and a torque current feedback signal; the sampling processing module is used for processing the exciting current feedback signal and the torque current feedback signal to obtain a driving signal; the frequency conversion module is used for receiving the driving signal and outputting a power supply signal to the synchronous motor so that the speed of the synchronous motor reaches a target speed.
Through the scheme, the beneficial effects of the application are that: the single-spindle control system in the embodiment adopts the synchronous motor, the frequency conversion module can output a power signal to the synchronous motor under the action of a driving signal output by the sampling processing module, the processor can sample the output of the synchronous motor, the synchronous motor is controlled according to a signal fed back by the synchronous motor, closed-loop control is realized, and because the efficiency of the synchronous motor is higher, the production efficiency of the single-spindle control system can be improved by controlling the synchronous motor, the energy consumption is reduced, and the load carrying and load disturbance resisting capacity of the single-spindle control system can be improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:
FIG. 1 is a schematic block diagram of an embodiment of a single-spindle control system provided herein;
FIG. 2 is a schematic flow chart diagram illustrating an embodiment of a control method for a single-spindle control system provided herein;
FIG. 3 is a schematic flow chart diagram illustrating another embodiment of a control method for a single-spindle control system provided herein;
FIG. 4 is a schematic structural diagram of another embodiment of a single-spindle control system provided herein;
FIG. 5 is a schematic structural diagram of an embodiment of a computer storage medium provided in the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. 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 application.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a single-spindle control system provided in the present application, the single-spindle control system includes a processor 10 and a synchronous motor 20 connected to each other, and the processor 10 includes a sampling processing module 11 and a frequency conversion module 12 connected to each other.
The synchronous motor 20 is configured to receive a power signal output by the frequency conversion module 12, and the synchronous motor 20 may be a single-spindle permanent magnet synchronous motor, which is a surface-mounted motor and has rated point efficiency of about 81%.
The processor 10 is configured to sample a current signal output by the synchronous motor 20 to obtain a first current sampling signal, and process the first current sampling signal to obtain an excitation current feedback signal and a torque current feedback signal.
The sampling processing module 11 is configured to process the excitation current feedback signal and the torque current feedback signal to obtain a driving signal, where the driving signal may be a Pulse Width Modulation (PWM) switching signal; the frequency conversion module 12 is configured to process the driving signal and output a power signal to the synchronous motor 20 so that the speed of the synchronous motor 20 reaches a target speed, where the power signal may be a three-phase ac voltage signal.
The single-spindle control system in the embodiment adopts the synchronous motor 20, a closed loop is formed between the synchronous motor 20 and the processor 10, the processor 10 can sample the output of the synchronous motor 20, the synchronous motor 20 is controlled according to a signal fed back by the synchronous motor 20, closed loop control is realized, the speed of the synchronous motor 20 is enabled to be gradually close to a target speed, and due to the fact that the efficiency of the synchronous motor 20 is high, the production efficiency of the single-spindle control system can be improved by controlling the synchronous motor 20, and energy consumption is reduced.
Referring to fig. 1 and fig. 2, fig. 2 is a schematic flowchart illustrating a control method of a single-spindle control system according to an embodiment of the present application, the single-spindle control system includes a processor 10 and a synchronous motor 20 connected to the processor 10, the processor 10 includes a sampling processing module 11 and a frequency conversion module 12 connected to each other, and the method includes:
step 21: and receiving the power supply signal output by the frequency conversion module by using the synchronous motor.
The power signal may be a three-phase ac voltage signal, and the synchronous motor 20 may receive the three-phase ac voltage signal output by the frequency conversion module 12 and operate under the action of the three-phase ac voltage signal.
Step 22: sampling a current signal output by the synchronous motor to obtain a first current sampling signal, and processing the first current sampling signal to obtain an exciting current feedback signal and a torque current feedback signal.
The processor 10 may sample a signal output by the synchronous motor 20, process a first current sampling signal obtained by the sampling to obtain an excitation current feedback signal and a torque current feedback signal, and input the excitation current feedback signal and the torque current feedback signal to the sampling processing module 11.
Step 23: and processing the exciting current feedback signal and the torque current feedback signal by using a sampling processing module to obtain a driving signal.
Step 24: and receiving the driving signal by using the frequency conversion module, and outputting a power supply signal to the synchronous motor so as to enable the speed of the synchronous motor to reach a target speed.
The frequency conversion module 12 can output a power signal to the synchronous motor 20 under the action of the driving signal output by the sampling processing module 11, the processor 10 can sample the output of the synchronous motor 20, and control the synchronous motor 20 according to the signal fed back by the synchronous motor 20, so as to realize closed-loop control, so that the speed of the synchronous motor 20 is gradually close to the target speed, and because the efficiency of the synchronous motor 20 is higher, the production efficiency of a single-spindle control system can be improved by controlling the synchronous motor 20, and the energy consumption is reduced.
Referring to fig. 1, fig. 3 and fig. 4, fig. 3 is a schematic flowchart of a control method of a single-ingot control system according to another embodiment of the present application, and fig. 4 is a schematic structural diagram of the single-ingot control system according to another embodiment of the present application, where the method includes:
step 301: and receiving the oscillating bar position instruction and the oscillating bar feedback signal by using an oscillating bar control module, and processing to obtain the auxiliary speed.
As shown in fig. 4, the sampling processing module 11 includes a swing link control module 1101, where the swing link control module 1101 may receive a swing link position instruction and a swing link feedback signal, where the swing link position instruction includes a preset position of a swing link, and the swing link feedback signal includes a current position of the swing link.
Due to the fact that the winding diameter is changed or the speed of the host machine is changed in the winding process, the speed is asynchronous, the position of the swing rod is changed, and the position of the swing rod can be controlled through the swing rod control module 1101; specifically, the position of the swing rod can be sampled to obtain the current position of the swing rod; then, the position of the swing rod is adjusted by using the swing rod control module 1101 according to the current position of the swing rod and the preset position of the swing rod, so that the position of the swing rod is the same as the preset position.
Further, when the position of the current swing link is lower than the preset position, the auxiliary speed output by the swing link control module 1101 is adjusted, so that the position of the swing link is raised; when the current position of the swing link is higher than the preset position, the auxiliary speed output by the swing link control module 1101 is adjusted so that the position of the swing link is lowered.
In a specific embodiment, the preset position may be set as a midpoint position, and when the current position of the swing link is lower than the midpoint position, the auxiliary speed output by the swing link control module 1101 is increased, and the speed of the synchronous motor 20 is increased, so that the position of the swing link is raised to the midpoint position; when the current position of the swing link is higher than the midpoint position, the assist speed output by the swing link control module 1101 is reduced, and the speed of the synchronous motor 20 is reduced, so that the position of the swing link is lowered to the midpoint position.
Step 302: and superposing the auxiliary speed and the host speed to obtain a reference speed.
During normal operation, the speed of the synchronous motor 20 is synchronous with the speed of the host, the speed of the host can be given by a Programmable Logic Controller (PLC), and the host speed is sent to the processor 10 by the upper-stage device through the PLC; the auxiliary speed output by the swing link control module 1101 is superimposed with the host speed output by the PLC to obtain a reference speed, which can be used as an input signal of the speed control module 1102, and the synchronous motor 20 can operate according to the reference speed, so that the swing link is always kept at the midpoint position.
Step 303: and the reference speed and the feedback speed are superposed and then input into the speed control module.
The reference speed is added to the feedback speed ω output by the speed observation module 1110 and then input to the speed control module 1102.
Step 304: and processing the feedback speed and the reference speed by using a speed control module to obtain a current reference signal.
The sampling processing module 11 further includes a speed control module 1102, an excitation adjusting module 1103, a field weakening control module 1104, and a current control module 1105, where the speed control module 1102 can adjust a current reference signal according to a difference between the feedback speed ω and the reference speed, and output the current reference signal to the current control module 1105.
After the current reference signal is obtained, the current control module 1105 is used for receiving the current reference signal and processing the current reference signal to obtain a torque current pre-reference signal and an excitation current pre-reference signal, and the current control module 1105 can decompose the current reference signal; then, the excitation adjusting module 1103 is used for processing the feedback speed ω to obtain an excitation current adjusting signal, and the excitation adjusting module 1103 can enhance the magnetic flux when the synchronous motor 20 runs at a low speed, so that the low-speed carrying capacity and the precision of the speed observing module 1110 are improved; the field weakening control module 1104 is used for processing the feedback speed omega and the voltage amplitude Um of the synchronous motor 20 to obtain a field weakening current control signal, and the field weakening control module 1104 can control the voltage amplitude Um of the synchronous motor 20 to perform field weakening, weaken magnetic flux when the synchronous motor 20 runs at a high speed, and improve the running speed of the synchronous motor 20.
Step 305: and receiving the torque current reference signal, the feedback speed and the coordinate transformation angle by using a torque control module, and processing to obtain a torque voltage pre-reference signal.
The synchronous motor 20 may be utilized to receive the power signal output by the frequency conversion module 12, and then the current signal output by the synchronous motor 20 is sampled to obtain a first current sampling signal Iabc.
The sampling processing module 11 further includes a coordinate conversion module 1109 and a speed observation module 1110, and coordinate conversion can be performed by using the coordinate conversion module 1109 according to the first current sampling signal Iabc and the initial coordinate conversion angle, so as to obtain a second current sampling signal Idq; the speed observation module 1110 receives the second current sampling signal Idq and the voltage feedback signal Udq, and processes the second current sampling signal Idq and the voltage feedback signal Udq to obtain a coordinate transformation angle θ and a feedback speed ω; and then, coordinate transformation is performed by using a coordinate transformation module 1109 according to the first current sampling signal Iabc and the coordinate transformation angle θ, so as to obtain an excitation current feedback signal Id and a torque current feedback signal Iq.
Further, the coordinate conversion module 1109 may convert abc coordinates into dq coordinates, the first current sampling signal Iabc is a three-phase signal, the second current sampling signal Idq is a two-phase signal, and the second current sampling signal Idq includes an excitation current feedback signal Id and a torque current feedback signal Iq.
Since the virtual speed observation module 1110 is used to measure the speed, a physical encoder is not needed to measure the speed of the synchronous motor 20, and the hardware cost is saved.
The sampling processing module 11 further includes a torque control module 1108, which can perform optimization processing on the torque current pre-reference signal, generate a torque current reference signal, and input the torque current reference signal into the torque control module 1108, and specifically, perform engineering processing on the torque current pre-reference signal.
Step 306: and receiving the excitation current reference signal by using the magnetic flux control module, and processing to obtain an excitation voltage pre-reference signal.
The sampling processing module 11 further includes a magnetic flux control module 1107, which can superimpose the excitation current adjusting signal, the field weakening current control signal, and the excitation current pre-reference signal to generate an excitation current reference signal, and input the excitation current reference signal to the magnetic flux control module 1107, that is, the excitation current reference signal is synthesized by the excitation current adjusting signal output by the excitation adjusting module 1103, the field weakening current control signal output by the field weakening control module 1104, and the excitation current pre-reference signal output by the current control module 1105.
Step 307: and receiving the feedback speed, the excitation current feedback signal, the torque current feedback signal and the permanent magnet magnetic flux by using the decoupling control module, and processing to obtain an excitation decoupling compensation voltage signal and a torque decoupling compensation voltage signal.
The sampling processing module 11 further includes a decoupling control module 1106, and the decoupling control module 1106 may receive the feedback speed ω output by the speed observation module 1110, the excitation current feedback signal Id and the torque current feedback signal Iq output by the coordinate conversion module 1109, and the permanent magnet magnetic flux ψ, and process them, thereby obtaining an excitation decoupling compensation voltage signal and a torque decoupling compensation voltage signal; the decoupling control module 1106 may reduce the coupling of torque current and excitation current, improving current feedback following capability.
Step 308: and superposing the excitation decoupling compensation voltage signal and the excitation voltage pre-reference signal to generate an excitation voltage reference signal, and inputting the excitation voltage reference signal into the modulation module.
The excitation voltage pre-reference signal Ud can be calculated by the magnetic flux control module 1107, and is synthesized with the excitation decoupling compensation voltage signal output by the decoupling control module 1106 to obtain the excitation voltage reference signal.
Step 309: and superposing the torque decoupling compensation voltage signal and the torque voltage pre-reference signal to generate a torque voltage reference signal to be input into the modulation module.
The speed observation module 1110 feeds back the feedback speed ω and the coordinate transformation angle θ to the torque control module 1108, and the torque control module 1108 calculates a torque voltage pre-reference signal Uq, and synthesizes the torque voltage pre-reference signal Uq and a torque decoupling compensation voltage signal output by the decoupling control module 1106 to obtain a torque voltage reference signal.
Step 310: and carrying out coordinate transformation according to the excitation voltage reference signal, the torque voltage reference signal and the coordinate transformation angle to obtain a modulation voltage signal.
The sampling processing module 11 further includes a modulation module 1111, the excitation voltage reference signal, the torque voltage reference signal and the coordinate transformation angle θ are used as inputs of the modulation module 1111, the modulation module 1111 may calculate a modulation voltage signal by using the coordinate transformation module 1109, the modulation voltage signal may be a three-phase ac voltage signal, and specifically, the modulation module 1111 converts the two-phase torque voltage reference signal and the excitation voltage reference signal into a three-phase modulation voltage signal.
Step 311: and comparing the modulation voltage signal with the carrier signal to obtain a driving signal.
The three-phase modulated voltage signal and the carrier signal can be compared by a carrier comparator (not shown), and the level of the two signals is compared to modulate a driving signal, which can control the switching action of a power tube (not shown) in the frequency conversion module 12.
Step 312: and receiving the driving signal by using the frequency conversion module, and outputting a power supply signal to the synchronous motor so as to enable the speed of the synchronous motor to reach a target speed.
The driving signal is a three-phase ac voltage signal, and the power tube can output the three-phase ac voltage signal to drive the synchronous motor 20 to operate.
In a specific embodiment, the parameters of the asynchronous machine and the synchronous machine 20 are as shown in table one.
Parameters of asynchronous and synchronous machines 20
| Kind of electric motor | Rated power | Rated voltage | Rated current | Rated frequency | Rated speed of rotation |
| Asynchronous motor | 120W | 220V | 0.7A | 100Hz | |
| Synchronous machine | |||||
| 20 | 120W | 220V | 0.7A | 186.6Hz | 2800rpm |
The asynchronous motor can be tested to obtain test data shown in the table II, when the test data are set according to parameters of 100Hz and 220V, the flux separation saturation area of the asynchronous motor has large margin, the output of each ampere of the asynchronous motor is small, so that the copper loss is large, and the efficiency of the asynchronous motor is not fully utilized; after 50Hz, the asynchronous motor enters a constant power area, the flux of the asynchronous motor is not saturated in the constant torque area, and the efficiency of the asynchronous motor is improved to a certain extent.
Test data of Meter-two asynchronous machine
According to the same working condition and test condition, the data of the synchronous motor 20 are tested, and the test data shown in table three can be obtained.
Test data of the synchronous machine 20
The above test data are all performed under the same test platform and working condition, the test data of the asynchronous motor and the synchronous motor 20 are analyzed, and the efficiency under the same working condition is compared to obtain the test data shown in table four.
Comparison of test data of TABLE IV asynchronous motor and synchronous motor 20
As can be seen from the comparative data in table four, the efficiency of the synchronous motor 20 is about 10% to 15% higher than that of the asynchronous motor at different speeds and under different loads.
Compared with the traditional VF control scheme of the asynchronous motor, the single-spindle control system in the embodiment adopts a high-performance vector control scheme without a speed sensor, the speed observation module 1110 is used for measuring the speed of the synchronous motor 20, speed feedback can be realized by using an algorithm, encoder sampling is not needed, cost is saved, fault points are reduced, the problem of inaccurate low speed can be solved, the efficiency of the winding motor is obviously improved after the synchronous motor 20 is used, vector control has stronger loading capacity and speed control characteristics, the speed control precision is high, the running speed and load disturbance resistance of the synchronous motor 20 can be improved, and the improvement of production efficiency and energy conservation are facilitated.
Referring to fig. 5, fig. 5 is a schematic structural diagram of an embodiment of a computer storage medium provided in the present application, the computer storage medium 50 is used for storing a computer program 51, and the computer program 51 is used for implementing the control method of the single-spindle control system when being executed by a processor.
The storage medium 50 may be a server, a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and various media capable of storing program codes.
In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of modules or units is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The above embodiments are merely examples, and not intended to limit the scope of the present application, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present application, or those directly or indirectly applied to other related arts, are included in the scope of the present application.
Claims (10)
1. A control method of a single-spindle control system, wherein the single-spindle control system comprises a processor and a synchronous motor connected with the processor, the processor comprises a frequency conversion module and a sampling processing module which are connected with each other, and the method comprises the following steps:
receiving a power supply signal output by the frequency conversion module by using the synchronous motor;
sampling a current signal output by the synchronous motor to obtain a first current sampling signal, and processing the first current sampling signal to obtain an exciting current feedback signal and a torque current feedback signal;
processing the exciting current feedback signal and the torque current feedback signal by using the sampling processing module to obtain a driving signal;
and receiving the driving signal by using the frequency conversion module, and outputting the power supply signal to the synchronous motor so as to enable the speed of the synchronous motor to reach a target speed.
2. The method of claim 1, wherein the sampling module further comprises a speed observation module and a coordinate transformation module, and the step of processing the first current sampling signal to obtain an excitation current feedback signal and a torque current feedback signal comprises:
performing coordinate transformation by using the coordinate transformation module according to the first current sampling signal and an initial coordinate transformation angle to obtain a second current sampling signal;
receiving the second current sampling signal and the voltage feedback signal by using the speed observation module, and processing the second current sampling signal and the voltage feedback signal to obtain a coordinate transformation angle and a feedback speed;
performing coordinate transformation by using the coordinate transformation module according to the first current sampling signal and the coordinate transformation angle to obtain the exciting current feedback signal and the torque current feedback signal;
the first current sampling signal is a three-phase signal, and the second current sampling signal is a two-phase signal.
3. The method of controlling a single-ingot control system of claim 2, wherein the sampling processing module further comprises a torque control module, a flux control module, a decoupling control module, and a modulation module, the method further comprising:
receiving a torque current reference signal, the feedback speed and the coordinate transformation angle by using the torque control module, and processing to obtain a torque voltage pre-reference signal;
receiving an excitation current reference signal by using the magnetic flux control module, and processing the excitation current reference signal to obtain an excitation voltage pre-reference signal;
receiving the feedback speed, the excitation current feedback signal, the torque current feedback signal and the permanent magnet magnetic flux by using the decoupling control module, and processing the signals to obtain an excitation decoupling compensation voltage signal and a torque decoupling compensation voltage signal;
superposing the excitation decoupling compensation voltage signal and the excitation voltage pre-reference signal to generate an excitation voltage reference signal which is input into the modulation module;
and superposing the torque decoupling compensation voltage signal and the torque voltage pre-reference signal to generate a torque voltage reference signal to be input into the modulation module.
4. The control method of a single-spindle control system according to claim 3, wherein the sampling processing module further comprises an excitation adjusting module, a field weakening control module and a current control module, and the method further comprises:
processing the feedback speed by using the excitation adjusting module to obtain an excitation current adjusting signal;
processing the feedback speed and the voltage amplitude of the synchronous motor by using the flux weakening adjusting module to obtain a flux weakening current control signal;
receiving a current reference signal by using the current control module, and processing the current reference signal to obtain a torque current pre-reference signal and an exciting current pre-reference signal;
superposing the excitation current adjusting signal, the weak magnetic current control signal and the excitation current pre-reference signal to generate an excitation current reference signal which is input into the magnetic flux control module;
and optimizing the torque current pre-reference signal, generating the torque current reference signal and inputting the torque current reference signal into the torque control module.
5. The method of controlling a single-ingot control system of claim 4, wherein the sample processing module further comprises a speed control module, the method further comprising:
and processing the feedback speed and the reference speed by using the speed control module to obtain the current reference signal.
6. The method of controlling a single-ingot control system of claim 5, wherein the sampling processing module further comprises a swing-bar control module, the method further comprising:
receiving a swing rod position instruction and a swing rod feedback signal by using the swing rod control module, and processing the swing rod position instruction and the swing rod feedback signal to obtain an auxiliary speed, wherein the swing rod position instruction comprises a preset position of a swing rod;
superposing the auxiliary speed and the host speed to obtain the reference speed;
and superposing the reference speed and the feedback speed and inputting the superposed speed and the superposed speed into the speed control module.
7. The method of controlling a single-ingot control system of claim 6, further comprising:
sampling the position of the oscillating bar to obtain the current position of the oscillating bar;
and adjusting the position of the oscillating bar by using the oscillating bar control module according to the current position of the oscillating bar and the preset position so as to enable the position of the oscillating bar to be the same as the preset position.
8. The method of claim 7, wherein the step of adjusting the position of the swing link according to the current position of the swing link and the preset position by using the swing link control module comprises:
when the position of the current swing rod is lower than the preset position, adjusting the auxiliary speed output by the swing rod control module to enable the position of the swing rod to rise;
and when the position of the current swing rod is higher than the preset position, adjusting the auxiliary speed output by the swing rod control module so as to enable the position of the swing rod to descend.
9. The method of claim 3, wherein the step of processing the excitation current feedback signal and the torque current feedback signal by the sampling module to obtain the driving signal comprises:
performing coordinate transformation according to the excitation voltage reference signal, the torque voltage reference signal and the coordinate transformation angle to obtain a modulation voltage signal;
and comparing the modulation voltage signal with a carrier signal to obtain the driving signal.
10. A single-spindle control system is characterized by comprising a processor and a synchronous motor which are connected with each other, wherein the processor comprises a frequency conversion module and a sampling processing module which are connected with each other, and the synchronous motor is used for receiving a power supply signal output by the frequency conversion module; the processor is used for sampling a current signal output by the synchronous motor to obtain a first current sampling signal, and processing the first current sampling signal to obtain an exciting current feedback signal and a torque current feedback signal; the sampling processing module is used for processing the exciting current feedback signal and the torque current feedback signal to obtain a driving signal; the frequency conversion module is used for receiving the driving signal and outputting the power supply signal to the synchronous motor so as to enable the speed of the synchronous motor to reach a target speed.
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Citations (4)
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