CN102751944B - Method and system for controlling middle/high voltage frequency converter - Google Patents
Method and system for controlling middle/high voltage frequency converter Download PDFInfo
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- CN102751944B CN102751944B CN201210222715.2A CN201210222715A CN102751944B CN 102751944 B CN102751944 B CN 102751944B CN 201210222715 A CN201210222715 A CN 201210222715A CN 102751944 B CN102751944 B CN 102751944B
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Abstract
The invention provides a method and a system for controlling a middle/high voltage frequency converter. The method comprises following steps of: transmitting an inversion modulation wave instruction controlled by voltage/frequency (V/F) or a vector to a control unit by a first main control chip; respectively connecting the control unit with the first main control chip, a second main control chip and each power unit so as to generate pulse width modulation (PWM) waves of each power unit through comparing a modulation wave with a stated carrier wave according to the inversion modulation wave instruction which is controlled by V/F or the vector, and transmit the PWM waves to the corresponding power units to realize V/F control or vector control over a motor; transmitting a logic control instruction on the motor to the control unit by the second main control chip; and transmitting the logic control instruction to the power units by the control unit so as to realize the logic control over the motor.
Description
Technical field
The present invention relates to electronic technology, relate in particular to a kind of control method and system of medium-high voltage frequency converter.
Background technology
At present, a main stream approach in medium-high voltage frequency converter scheme is utilized power unit cascade scheme exactly, and multistage low pressure and low power units in series is got up to realize High voltage output.Wherein, this scheme possess harmonic wave of output voltage little, improve electrical machinery life and reduce electromagnetic interference etc. limited.In addition, in the high voltage converter of cascade of power units formula, controller is its most crucial topmost component part, and it has been mainly the tasks such as input and output processing of motor control strategy, many level pulse widths (PWM) algorithm, fiber optic serial communication, host computer communication, digital quantity/analog quantity.The real-time of controller and disposal ability have determined the control performance of system to motor greatly.
Controller of the prior art mainly comprises: main control chip and a plurality of outer net control unit.Wherein, peripheral control unit is generally the chip that possesses certain logical process ability, such as MCU or CPLD etc.Each peripheral control unit is responsible for the control of a power cell, all peripheral control units directly carry out communicating by letter of data with control chip, main control chip is being brought into play commander in chief's effect, be that main control chip sends control command to each peripheral control unit, peripheral control unit receives after the instruction of master control by optical fiber communication sending controling instruction to power cell.Peripheral control unit transmitting element control command is given each power cell, and the running state information that processing power unit feedback is come simultaneously feeds back to main control chip again.
But, due to controller can only serial execution instruction, power cell is sent out to the poor synchronization that PWM ripple is controlled, therefore, caused the time error of each power cell action large, and control performance is undesirable, cost is high and reliability is low.
Summary of the invention
The invention provides a kind of control method and system of medium-high voltage frequency converter, for having solved the execution instruction that prior art middle controller can only serial, power cell is sent out to the poor synchronization that PWM ripple is controlled, therefore, caused the time error of each power cell action large, and the problem that control performance is undesirable, cost is high and reliability is low.
First aspect of the present invention is to provide a kind of control system of medium-high voltage frequency converter, comprising: the first main control chip, control unit, the second main control chip and power cell;
Described the first main control chip, is connected with described control unit, for the inversion modulating wave instruction of V/F or vector control is sent to described control unit;
Described control unit, respectively with described the first main control chip, the second main control chip and described in each power cell be connected, be used for according to the inversion modulating wave instruction of described V/F or vector control, carrier wave by modulating wave and after setting compares, generate the pulse width modulation (PWM) ripple of power cell described in each, and described PWM ripple is sent to corresponding described each power cell, to realize the V/F of motor, control or vector control;
Described the second main control chip, is connected with described control unit, for sending logic control order to described control unit;
Described control unit is also for sending to described power cell by described logic control order, to realize the logic control to described motor.
Another aspect of the present invention is to provide a kind of control method of medium-high voltage frequency converter, comprising:
The first main control chip sends to control unit by the inversion modulating wave instruction of described V/F or vector control;
Described control unit is according to the inversion modulating wave instruction of described V/F or vector control, the carrier wave of modulating wave and setting is compared, generate the pulse width modulation (PWM) ripple of power cell described in each, and described PWM ripple is sent to corresponding described each power cell, to realize the V/F of motor, control or vector control;
Described the second main control chip sends logic control order to described control unit;
Described control unit sends to described power cell by described logic control order, to realize the logic control to described motor.
Technique effect of the present invention is: by the first main control chip and the second main control chip concurrent working, and independent algorithm or the logic task be responsible for of difference, thereby effectively improved the reliability of control performance, made the asynchronous serial communication of the execution instruction that real-time of the present invention can only serial than prior art middle controller high; In addition, because FPGA can send PWM ripple and logic control order to each power cell simultaneously, thereby guaranteed the synchronism that each power cell is controlled, the performance of system is provided.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of the control system of medium-high voltage frequency converter of the present invention;
Fig. 2 is the structural representation of another embodiment of the control system of medium-high voltage frequency converter of the present invention;
Fig. 3 is the flow chart of an embodiment of the control method of medium-high voltage frequency converter of the present invention.
Embodiment
Fig. 1 is the structural representation of an embodiment of the control system of medium-high voltage frequency converter of the present invention, as shown in Figure 1, the system of the present embodiment comprises: the first main control chip 11, control unit 12, the second main control chip 13 and power cell 14, wherein, the first main control chip 11 is connected with control unit 12, for the inversion modulating wave instruction of this V/F or vector control is sent to control unit 12; Control unit 12 is connected with the first main control chip 11, the second main control chip 12 and each power cell 14 respectively, be used for according to the inversion modulating wave instruction of this V/F or vector control, carrier wave by modulating wave and after setting compares, and generates pulse width modulation (the Pulse Width Modulation of each power cell 14; Be called for short: PWM) ripple, and PWM ripple is sent to each corresponding power cell 14, to realize the V/F of motor, control or vector control; The second main control chip 13, is connected with control unit 12, for sending the logic control order of motor to this control unit 12.This control unit 12 is also for sending to this power cell 14 by this logic control order, to realize the logic control to motor.
Wherein, carrier wave refers to the frequency of switching tube.
Preferably, this control unit 12 can be specially field programmable gate array (Field-Programmable Gate Array; Be called for short: FPGA).Control unit 12 specifically can be connected with each power cell by optical fiber interface; And the logic control of motor comprises the logic controls such as rotating to motor, acceleration and deceleration.
In addition, in the present embodiment, this first main control chip 11 can comprise at least one microprocessor, for example: Digital Signal Processing (Digital Signal Processing; Be called for short: DSP), single-chip microcomputer or ARM etc.The second main control chip also can specifically comprise at least one microprocessor, such as: DSP, single-chip microcomputer or ARM etc.It should be noted that, the first main control chip 11 and the second main control chip 13 can identical can be not identical yet.
Also it should be noted that, V/F controls and vector control is two kinds of control methods of motor, wherein, V/F is fairly simple, just output voltage V and output frequency F are carried out to constant ratio calculating, vector control is more complicated, is by the Current Decomposition of motor, to be 2 current phasor sums by vector method, be a kind of flux regulator method of motor, this control method is more superior than V/F control method.
In the present embodiment, by the first main control chip and the second main control chip concurrent working, and independent algorithm or the logic task be responsible for of difference, thereby effectively improved the reliability of control performance, made the asynchronous serial communication of the execution instruction that real-time of the present invention can only serial than prior art middle controller high; In addition, because FPGA can send PWM ripple and logic control order to each power cell simultaneously, thereby guaranteed the synchronism that each power cell is controlled, the performance of system is provided.
Fig. 2 is the structural representation of another embodiment of the control system of medium-high voltage frequency converter of the present invention, on above-mentioned basis embodiment illustrated in fig. 1, as shown in Figure 2, this control unit 12 comprises: dual port RAM module 121, unit information processing module 122, PWM ripple generation module 123 and Communications Processor Module 124.Concrete, dual port RAM module 121 is connected with this second main control chip 13 with the first main control chip 11, for realizing the data high-speed communication between this first main control chip 11 and this second main control chip 13; Unit information processing module 122 is connected with this second main control chip 13 respectively, for receiving the operating state signal of each power cell, and this operating state signal is sent to this second main control chip 13; And reception is from the control logic order to motor of this second main control chip transmission; PWM ripple generation module 123, be connected with this first main control chip 11, for receiving this V/F of these first main control chip, 11 transmissions or the inversion modulating wave instruction of vector control, and according to the inversion modulating wave instruction of this V/F or vector control, the carrier wave of modulating wave and setting is compared, generate the PWM ripple of each power cell, and by the PWM ripple output of this each power cell; Communications Processor Module 124 is connected with each power cell with this unit information processing module 122, this PWM ripple generation module 123 respectively, for the operating state signal of each power cell receiving is transmitted to unit information processing module 122, and the PWM ripple of this each power cell and logic control instruction are sent to each power cell by optical fiber communication.
In addition, owing to being provided with dual port RAM module in control unit 12, thereby make the first main control chip 11 and the second main control chip 13 the same address location in dual port RAM module to be carried out read-write operation and not clashed simultaneously, and access time only needed for tens nanoseconds.For instance, in the present embodiment, dual port RAM module comprises port A and port B, and wherein, port A is connected with the first main control chip 11, and port B is connected with the second main control chip 13.FPGA 12 is also equivalent to a control chip, and possesses certain information processing capability, thereby can share the burden of two main control chips, meets high-end Frequency Converter Control demand.
Further, the second main control chip 13 is also for the treatment of user's control inputs output (Input Output; Be called for short: IO) signal, system are controlled IO signal and analog input output signal; Receive input voltage and the input current of frequency converter; User's man-machine interface (Human Machine Interface is provided; Be called for short: HMI) and with host computer carry out data communication.
Wherein, this input voltage and input current can be shown to user by HMI, and when abnormal, send information warning, with reminding user at input voltage and/or input current.
The first main control chip 11 is also for gathering output voltage, output current and the motor rotate speed feedback signal of this frequency converter.
Wherein, the first main control chip 11 can obtain vector operation specifically for according to output voltage and output current, and according to vector operation, obtains the inversion modulating wave instruction of vector control;
In addition, the first main control chip 11 also, for according to this motor rotate speed feedback signal, generates motor speed instruction, and this motor speed instruction is sent to this control unit 12;
Control unit 12 sends to each corresponding power cell by this motor speed instruction, to realize the rotating speed of motor, controls.
Preferably, the operating state signal of each power cell that this second control chip 13 also feeds back for reception control unit 12, and show that by HMI this operating state signal is to user.
More preferably, this second control chip 13 can also be realized the input/output interface function with user.
In the present embodiment, by the first main control chip and the second main control chip concurrent working, and independent algorithm or the logic task be responsible for of difference, thereby effectively improved the reliability of control performance, and by the dual port RAM module of FPGA inside, realize the high-speed communication of the data between the first main control chip and the second main control chip, can to the same address location in dual port RAM, carry out read-write operation simultaneously, make the asynchronous serial communication of the execution instruction that real-time of the present invention can only serial than prior art middle controller high; In addition, because FPGA can send PWM ripple and logic control order to each power cell simultaneously, thereby guaranteed the synchronism that each power cell is controlled, the performance of system is provided.
Also it should be noted that, main control chip in the control system of medium-high voltage frequency converter of the present invention is not limited to two main control chips described above, can also comprise four main control chips, its realize principle and above-mentioned two main control chips to realize principle similar, repeat no more herein.
Fig. 3 is the flow chart of an embodiment of the control method of medium-high voltage frequency converter of the present invention, and as shown in Figure 3, the method for the present embodiment comprises:
Step 101, the first main control chip send to unit processed by the inversion modulating wave instruction of this V/F or vector control.
Step 102, control unit are according to the inversion modulating wave instruction of this V/F or vector control, the carrier wave of modulating wave and setting is compared, generate the PWM ripple of each power cell, and this PWM ripple is sent to each corresponding power cell, to realize the V/F of motor, control or vector control.
Step 103, the second main control chip send logic control order to this control unit.
Step 104, control unit send to power cell by this logic control order, to realize the logic control to this motor.
Wherein, control unit can be FPGA, and specifically can be connected with each power cell by optical fiber interface; And the logic control of motor comprises the logic controls such as rotating to motor, acceleration and deceleration.
In addition, this first main control chip can comprise at least one microprocessor, such as: DSP, single-chip microcomputer or ARM etc.The second main control chip also can specifically comprise at least one microprocessor, such as: DSP, single-chip microcomputer or ARM etc.It should be noted that, the first main control chip and the second main control chip can identical can be not identical yet.
In the present embodiment, by the first main control chip and the second main control chip concurrent working, and independent algorithm or the logic task be responsible for of difference, thereby effectively improved the reliability of control performance, made the asynchronous serial communication of the execution instruction that real-time of the present invention can only serial than prior art middle controller high; In addition, because FPGA can send PWM ripple and logic control order to each power cell simultaneously, thereby guaranteed the synchronism that each power cell is controlled, the performance of system is provided.
Further, in another embodiment of the present invention, on the basis of embodiment of the method shown in above-mentioned Fig. 3, between this first main control chip and this second main control chip, by the dual port RAM module in this FPGA, carry out data high-speed communication.
In the present embodiment, owing to being provided with dual port RAM module in FPGA, thereby make the first main control chip and the second main control chip the same address location in dual port RAM module to be carried out read-write operation and not clashed simultaneously, and access time only needed for tens nanoseconds.
In addition, the method can further include:
The second main control chip is processed user and is controlled IO signal, system control IO signal and analog input output signal; Receive input voltage and the input current of this frequency converter; And user's man-machine interface is provided and carries out data communication with host computer.
And/or,
The first main control chip gathers output voltage, output current and the motor rotate speed feedback signal of this frequency converter.
The acquisition process of the inversion modulating wave instruction of vector control is:
According to output voltage and output current, obtain vector operation, and according to vector operation, obtain the inversion modulating wave instruction of vector control;
And the method can further include:
The first main control chip, according to motor rotate speed feedback signal, generates motor speed instruction, and motor speed instruction is sent to control unit;
Control unit sends to each corresponding power cell by motor speed instruction, to realize the rotating speed of motor, controls.
In the present embodiment, by the first main control chip and the second main control chip concurrent working, and be independently responsible for respectively algorithm or logic task, thereby effectively improved the reliability of control performance; And by the dual port RAM module of FPGA inside, realize the high-speed communication of the data between the first main control chip and the second main control chip, can to the same address location in dual port RAM, carry out read-write operation simultaneously, make the asynchronous serial communication of the execution instruction that real-time of the present invention can only serial than prior art middle controller high; In addition, because FPGA can send PWM ripple and logic control order to each power cell simultaneously, thereby guaranteed the synchronism that each power cell is controlled, the performance of system is provided.
Finally it should be noted that: each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit above; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (6)
1. a control system for medium-high voltage frequency converter, is characterized in that, comprising: the first main control chip, control unit, the second main control chip and power cell;
Described the first main control chip, is connected with described control unit, for the inversion modulating wave instruction of V/F or vector control is sent to described control unit;
Described control unit, respectively with described the first main control chip, the second main control chip and described in each power cell be connected, be used for according to the inversion modulating wave instruction of described V/F or vector control, carrier wave by modulating wave and after setting compares, generate the pulse width modulation (PWM) ripple of power cell described in each, and described PWM ripple is sent to corresponding described each power cell, to realize the V/F of motor, control or vector control;
Described the second main control chip, is connected with described control unit, for sending logic control order to described control unit;
Described control unit is also for sending to described power cell by described logic control order, to realize the logic control to described motor;
Described the first main control chip is also for gathering output voltage, output current and the motor rotate speed feedback signal of described frequency converter;
Described the first main control chip, also for according to described output voltage and output current, obtains vector operation, and according to described vector operation, obtains the inversion modulating wave instruction of described vector control; According to described motor rotate speed feedback signal, generate motor speed instruction, and described motor speed instruction is sent to described control unit;
Described control unit, also for described motor speed instruction being sent to corresponding described each power cell, is controlled to realize the rotating speed of motor.
2. the control system of medium-high voltage frequency converter according to claim 1, is characterized in that, described control unit comprises:
Dual port RAM module, is connected with described the second main control chip with described the first main control chip, for realizing the data high-speed communication between described the first main control chip and described the second main control chip;
Unit information processing module, is connected with described the second main control chip respectively, for receiving the operating state signal of described each power cell, and described operating state signal is sent to described the second main control chip; And reception is from the control logic order to motor of described the second main control chip transmission;
PWM ripple generation module, be connected with described the first main control chip, for receiving the described V/F of described the first main control chip transmission or the inversion modulating wave instruction of vector control, and according to the inversion modulating wave instruction of described V/F or vector control, the carrier wave of described modulating wave and described setting is compared, generate the described PWM ripple of power cell described in each, and by the described PWM ripple output of power cell described in each;
Communications Processor Module, be connected with described each power cell with described unit information processing module, described PWM ripple generation module respectively, for the operating state signal of described each power cell receiving is transmitted to described unit information processing module, and by described described in each PWM ripple and described logic control instruction of power cell send to described each power cell.
3. the control system of medium-high voltage frequency converter according to claim 1 and 2, is characterized in that, described the second main control chip is also controlled IO signal, system control IO signal and analog input output signal for the treatment of user; Receive input voltage and the input current of described frequency converter; User's man-machine interface is provided and carries out data communication with host computer.
4. a control method for medium-high voltage frequency converter, is characterized in that, comprising:
The first main control chip sends to control unit by the inversion modulating wave instruction of V/F or vector control;
Described control unit is according to the inversion modulating wave instruction of described V/F or vector control, the carrier wave of modulating wave and setting is compared, generate the pulse width modulation (PWM) ripple of each power cell, and described PWM ripple is sent to corresponding described each power cell, to realize the V/F of motor, control or vector control;
The second main control chip sends logic control order to described control unit;
Described control unit sends to described power cell by described logic control order, to realize the logic control to described motor;
Described the first main control chip gathers output voltage, output current and the motor rotate speed feedback signal of described frequency converter;
The acquisition process of the inversion modulating wave instruction of described vector control is:
According to described output voltage and output current, obtain vector operation, and according to described vector operation, obtain the inversion modulating wave instruction of described vector control;
And described method also comprises:
Described the first main control chip, according to described motor rotate speed feedback signal, generates motor speed instruction, and described motor speed instruction is sent to described control unit;
Described control unit sends to corresponding described each power cell by described motor speed instruction, to realize the rotating speed of motor, controls.
5. the control method of medium-high voltage frequency converter according to claim 4, is characterized in that, between described the first main control chip and described the second main control chip, by the dual port RAM module in described control unit, carries out data high-speed communication.
6. according to the control method of the medium-high voltage frequency converter described in claim 4 or 5, it is characterized in that, also comprise:
Described the second main control chip is processed user and is controlled IO signal, system control IO signal and analog input output signal; Receive input voltage and the input current of described frequency converter; User's man-machine interface is provided and carries out data communication with host computer.
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| CN201210222715.2A CN102751944B (en) | 2012-06-29 | 2012-06-29 | Method and system for controlling middle/high voltage frequency converter |
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| CN201210222715.2A CN102751944B (en) | 2012-06-29 | 2012-06-29 | Method and system for controlling middle/high voltage frequency converter |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102981438A (en) * | 2012-12-10 | 2013-03-20 | 哈尔滨九洲电气股份有限公司 | Multi-power-unit tandem FPGA control device and control method for chain type SVG |
| CN103078563B (en) * | 2013-01-07 | 2016-04-13 | 安徽颐和新能源科技股份有限公司 | The software implementation method that high voltage converter driving starts surely frequently |
| CN105743336B (en) * | 2014-12-10 | 2019-08-02 | 沈阳远大电力电子科技有限公司 | A kind of cascaded high-voltage frequency converter and its master control system |
| CN105356820A (en) * | 2015-12-08 | 2016-02-24 | 武汉大禹电气有限公司 | Middle and high voltage frequency conversion speed regulation double CPU control system and control method thereof |
| CN106505832A (en) * | 2016-11-11 | 2017-03-15 | 大禹电气科技股份有限公司 | A kind of high voltage transducer power unit control system and method based on CPLD |
| WO2018209637A1 (en) * | 2017-05-18 | 2018-11-22 | 深圳市海浦蒙特科技有限公司 | Positioning control method and system for machine tool spindle |
| CN113676069B (en) * | 2021-09-08 | 2023-06-16 | 新风光电子科技股份有限公司 | Parallel circulation suppression method for cascaded high-voltage frequency converter |
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| US4788485A (en) * | 1986-03-24 | 1988-11-29 | Mitsubishi Denki Kabushiki Kaisha | Apparatus for controlling electric motor |
| CN101359881A (en) * | 2008-09-26 | 2009-02-04 | 清华大学 | Pulse width modulation method based on minimum common mode transient voltage superimposed |
| CN101478282A (en) * | 2009-01-20 | 2009-07-08 | 深圳市英威腾电气股份有限公司 | Method for realizing high voltage frequency transformer main control system by built-in dual-port RAM of FPGA |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5749391A (en) * | 1980-09-08 | 1982-03-23 | Toshiba Corp | Inverter controlling circuit for driving motor |
| ZA883913B (en) * | 1987-06-03 | 1989-02-22 | Hitachi Ltd | Inverter control apparatus |
| JPH04178195A (en) * | 1990-11-09 | 1992-06-25 | Hakutou Kk | Pwm controller for single-phase motor |
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|---|---|---|---|---|
| US4788485A (en) * | 1986-03-24 | 1988-11-29 | Mitsubishi Denki Kabushiki Kaisha | Apparatus for controlling electric motor |
| CN101359881A (en) * | 2008-09-26 | 2009-02-04 | 清华大学 | Pulse width modulation method based on minimum common mode transient voltage superimposed |
| CN101478282A (en) * | 2009-01-20 | 2009-07-08 | 深圳市英威腾电气股份有限公司 | Method for realizing high voltage frequency transformer main control system by built-in dual-port RAM of FPGA |
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| JP昭57-49391A 1982.03.23 * |
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