CN101795085A - Real-time controller of universal frequency converter - Google Patents
Real-time controller of universal frequency converter Download PDFInfo
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- CN101795085A CN101795085A CN 201010151233 CN201010151233A CN101795085A CN 101795085 A CN101795085 A CN 101795085A CN 201010151233 CN201010151233 CN 201010151233 CN 201010151233 A CN201010151233 A CN 201010151233A CN 101795085 A CN101795085 A CN 101795085A
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Abstract
The invention provides a real-time controller of a universal frequency converter, which comprises a first floating-point DSP, a first dual-port RAM and a microprocessor, wherein the microprocessor is used for sending control command information to the first floating-point DSP via the first dual-port RAM; the operation information of the first floating-point DSP is sent to an upper machine via the first dual-port RAM; the first floating-point DSP is used for reading the external voltage signal and current signal and carrying out algorithm operation according to the voltage signal, the current signal and the control command information, and PWM control pulse is generated by the operation result to realize rectifier control. The real-time controller of the universal frequency converter has higher real-time property and low cost.
Description
Technical field
The present invention relates to the Frequency Converter Control technical field, particularly a kind of real-time controller of universal frequency converter.
Background technology
Along with the development of power electronic technology, universal frequency converter is as the product of power electronic technology, is widely used as industries such as metallurgy, oil, electric power in the every field of national economy.
Frequency converter is to utilize the on-off action of power semiconductor device power frequency supply to be transformed to the control device of another frequency electric energy.Real-time controller of universal frequency converter is the most critical parts of Frequency Converter Control, is directly connected to the controlling performance and the reliability of frequency converter.The effect of real-time controller of universal frequency converter is that the voltage and current signal according to system acquisition carries out a series of complex calculations, according to the pwm pulse of operation result generation driving power unit, the control command realization logic control that the while basis receives from the outside, the transmission of Control Parameter and real time communication etc.At present, the framework that a kind of real-time controller of universal frequency converter is arranged is fixed DSP+FPGA, but the shortcoming of this framework is a fixed DSP processing of floating number is had certain restriction, therefore, influences control precision.In order to solve the problem of control precision, also have a kind of structure of real-time controller of universal frequency converter in the prior art, describe in detail below in conjunction with Fig. 1.
Referring to Fig. 1, this figure is the structural representation of real-time controller of universal frequency converter in the prior art.
The structure of real-time controller of universal frequency converter mainly adopts the version of the main DSP101+ floating-point processing DSP 102+PLC103 of association of fixed point at present.
Wherein, the processing of fix a point that main DSP101 finishes mainly that system logic is judged, the control of power cell and fault being interrupted.The main DSP101 that fixes a point carries out exchanges data by dual port RAM 104 and floating-point association processing DSP 102, is specially: the main DSP101 that fixes a point sends to detected voltage and current signal by dual port RAM 104 and is specifically designed to that complicated vector calculates, arithmetic speed floating-point association processing DSP 102 faster; The main DSP101 that fixes a point controls the ON time and the frequency of each power cell according to the operation result output control signal of floating-point association processing DSP 102, changes the output frequency of frequency converter.
PLC103 is mainly used in the logic control of frequency converter switching signal.PLC103 and the main DSP101 of fixed point adopt hardwired signal definition.
Because PLC103 carries out the logic control of switching signal, has increased cost greatly.And, floating-point association processing DSP 102 is carried out after the computing, again operation result is sent back to the main DSP101 of fixed point, the main DSP101 that fixes a point then controls the ON time and the frequency of each power cell according to operation result output pwm control signal, change the output frequency of frequency converter, this has influenced the real-time of system to a certain extent.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of real-time controller of universal frequency converter, and cost simple in structure is low, the real-time height.
The embodiment of the invention provides a kind of real-time controller of universal frequency converter, comprising: first Floating-point DSP, first dual port RAM and microprocessor;
Described microprocessor is used for by described first dual port RAM control command information being sent to described first Floating-point DSP; And the operation information of described first Floating-point DSP is sent to host computer by described first dual port RAM;
Described first Floating-point DSP is used to read outside voltage signal and current signal, carries out the algorithm computing according to described voltage signal, current signal and control command information, produces the PWM control impuls by operation result, realizes rectification control.
Preferably, also comprise second Floating-point DSP and second dual port RAM;
Described microprocessor also is used for by described second dual port RAM described control command information being sent to described second Floating-point DSP; And the operation information of described second Floating-point DSP is sent to described host computer by described second dual port RAM;
Described second Floating-point DSP is used to read outside voltage signal and current signal, carries out the algorithm computing according to described voltage signal, current signal and control command information, produces the PWM control impuls by operation result, realizes inversion control.
Preferably, also comprise data buffer unit, described first Floating-point DSP and second Floating-point DSP send to power cell with the PWM control impuls that produces by described data buffer unit.
Preferably, also comprise the FPGA (Field Programmable Gate Array) control unit, be used for address signal, read-write and the chip selection signal of described microprocessor, first Floating-point DSP and second Floating-point DSP are deciphered, produce logic gating signal, direction control signal and the read-write of peripheral circuit, first dual port RAM, second dual port RAM, data buffer unit and the parallel bus interface of described microprocessor.
Preferably, described microprocessor hangs with Ethernet interface, RS485 interface, USB interface, UART interface, parallel bus interface and PROFIBUS interface.
Preferably, described first Floating-point DSP and second Floating-point DSP all carry FLASH, SDRAM and jtag interface;
Described FLASH is used to store DSP program and service data;
Described SDRAM, the real time data that is used for storing dsp operation;
Described jtag interface is used for the download and the debugging of program.
Preferably, described microprocessor carries NOR FLASH, NAND FLASH, SDRAM and jtag interface;
Described NOR FLASH is used for storage operating system and application program;
Described NAND FLASH is used to store data and failure logging;
Described SDRAM, the internal memory that is used for microprocessor uses, and described operating system and application program are moved in this SDRAM.
Preferably, also comprise power subsystem, be used to provide 5V voltage, 3.3V voltage, 1.8V voltage and 1.2V voltage;
5V voltage provides digital 5V power supply later on through filtering;
3.3V be the peripheral circuit power supply of described microprocessor, first Floating-point DSP, second Floating-point DSP, also be described FPGA (Field Programmable Gate Array) control unit power supply;
1.8V be the kernel power supply of described microprocessor;
1.2V be the kernel power supply of described first Floating-point DSP and second Floating-point DSP;
Preferably, also comprise reset unit, be used to described microprocessor, first Floating-point DSP and second Floating-point DSP that reset signal is provided.
The embodiment of the invention also provides a kind of real-time controller of universal frequency converter, comprises microprocessor, second Floating-point DSP and second dual port RAM;
Described microprocessor is used for by described second dual port RAM control command information being sent to described second Floating-point DSP; And the operation information of described second Floating-point DSP is sent to host computer by described second dual port RAM;
Described second Floating-point DSP is used to read outside voltage signal and current signal, carries out the algorithm computing according to described voltage signal, current signal and control command information, produces the PWM control impuls by operation result, realizes inversion control.
Compared with prior art, the present invention has the following advantages:
This real-time controller of universal frequency converter is realized the real-time control of universal frequency converter by microprocessor, first Floating-point DSP and first dual port RAM.Because first Floating-point DSP can be handled floating number, has precise computation ability, can finish complicated calculating according to voltage signal of gathering and current signal, produce the PWM control impuls by result of calculation, directly the PWM control impuls is exported, and can directly carry out exchanges data between first Floating-point DSP and the microprocessor, can guarantee higher control real-time like this.In addition, controller provided by the invention directly just can be realized the logic control of switching signal with microprocessor, and do not need that expensive PLC carries out the logic control of switching signal in the prior art, therefore, the cost of this real-time controller of universal frequency converter is lower.
Description of drawings
Fig. 1 is the structural representation of real-time controller of universal frequency converter in the prior art;
Fig. 2 is the real-time controller of universal frequency converter structural representation that the embodiment of the invention one provides;
Fig. 3 is the real-time controller of universal frequency converter structural representation that the embodiment of the invention two provides;
Fig. 4 is the real-time controller of universal frequency converter structural representation that the embodiment of the invention three provides;
Fig. 5 is the real-time controller of universal frequency converter structural representation that the embodiment of the invention four provides;
Fig. 6 is the universal frequency converter provided by the invention another example structure schematic diagram of control in real time.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing.
Referring to Fig. 2, this figure is the real-time controller of universal frequency converter structural representation that the embodiment of the invention one provides.
The real-time controller of universal frequency converter that this embodiment provides comprises: first Floating-point DSP 201, first dual port RAM 202 and microprocessor 203.
Described microprocessor 203 is used to realize the management and the Control on Communication of whole system by described first dual port RAM 202 control command information is sent to described first Floating-point DSP 201; And the operation information of described first Floating-point DSP 201 is sent to host computer by described first dual port RAM 202.
Main management and Control on Communication that described microprocessor 203 is finished comprise: the logic control of switching signal, the Control on Communication with first Floating-point DSP, failure logging, program download etc.
Need to prove that microprocessor 203 can adopt the ARM chip, preferably can adopt the ARM9 chip.Certainly, the microprocessor chip with identical function all can adopt, and embodiments of the invention are not done concrete restriction, for example, can adopt the POWER PC microprocessor with identical function.
Described first Floating-point DSP 201, be used to read outside voltage signal and current signal, carry out the algorithm computing, produce the PWM control impuls by operation result according to described voltage signal and current signal, realization rectification control is transformed to controlled direct current with three-phase alternating current.This real-time controller of universal frequency converter is realized the real-time control of universal frequency converter by microprocessor 203, first Floating-point DSP 201 and first dual port RAM 202.Because first Floating-point DSP 201 can be handled floating number, has precise computation ability, can realize finishing complicated calculating by voltage signal, current signal and control command information, produce the PWM control impuls, directly the PWM control impuls is exported, and first Floating-point DSP 201 and microprocessor 203 can directly carry out exchanges data, can guarantee higher control real-time like this.In addition, owing to costing an arm and a leg of PLC, controller provided by the invention directly just can be realized the logic control of switching signal with microprocessor, and does not need PLC to carry out the logic control of switching signal, and therefore, the cost of this real-time controller of universal frequency converter is lower.
Referring to Fig. 3, this figure is the real-time controller of universal frequency converter structural representation that the embodiment of the invention two provides.
Compare with embodiment illustrated in fig. 2, the real-time controller of universal frequency converter that present embodiment provides also comprises second Floating-point DSP 204 and second dual port RAM 205.
Described microprocessor 203 also is used for by described second dual port RAM 205 described control command information being sent to described second Floating-point DSP 204; And the operation information of described second Floating-point DSP 204 is sent to host computer by described second dual port RAM 205.
Described second Floating-point DSP 204, be used to read outside voltage signal and current signal, carry out the algorithm computing according to described voltage signal, current signal and control command information, produce the PWM control impuls by operation result, realize inversion control, direct current is become the adjustable three-phase alternating current of electric voltage frequency.
Need to prove that second Floating-point DSP 204 is identical with the operation principle of first Floating-point DSP 201, difference only is a rectification control that is used for universal frequency converter, an inversion control that is used for universal frequency converter.Be understandable which does not limit wherein be used for rectification control, which is used for inversion control.
Because two Floating-point DSP all can be finished complex calculations, therefore, the real-time controller of universal frequency converter that this embodiment provides can be realized rectification control and inversion control simultaneously.Because the work of two Floating-point DSP is independent mutually, therefore can be disassembled into two independent cover control system, if when only needing to realize rectification control, can select second Floating-point DSP not work; In like manner, if when only needing to realize inversion control, can select first Floating-point DSP not work.
Introduce the framework of real-time controller of universal frequency converter in detail below in conjunction with Fig. 4.
Referring to Fig. 4, this figure is the real-time controller of universal frequency converter structural representation that the embodiment of the invention three provides.
Need to prove that described first Floating-point DSP reads outside voltage signal and current signal, and second Floating-point DSP reads outside voltage signal and current signal and all reads by parallel bus.
Real-time controller of universal frequency converter also comprises data buffer unit 207, and described first Floating-point DSP 201 and second Floating-point DSP 204 send to power cell with the PWM control impuls that produces by described data buffer unit 207.
The real-time controller of universal frequency converter that present embodiment provides also comprises the FPGA (Field Programmable Gate Array) control unit, and present embodiment preferably adopts programmable logic device 206 (CPLD, Complex Programmable LogicDevice).
CPLD206 is used for address signal, read-write and the chip selection signal of described microprocessor 203, first Floating-point DSP 201 and second Floating-point DSP 204 are deciphered, and produces logic gating signal, direction control signal and the read-write of described microprocessor 203 peripheral circuits, first dual port RAM 202, second dual port RAM 205, data buffer unit 207 and parallel bus interface.
Wherein, microprocessor 203 hangs with Ethernet interface, USB interface, RS485 interface, UART interface, external bus expansion interface, parallel bus interface and PROFIBUS interface, and these interfaces can be realized and the communicating by letter of multiple external control system.
Referring to Fig. 5, this figure is the real-time controller of universal frequency converter structural representation that the embodiment of the invention four provides.
The real-time controller of universal frequency converter that present embodiment provides also comprises: power subsystem 208, reset unit 209 and clock generation unit 210.
Need to prove that the 5V voltage of power subsystem 208 outputs is the later digital 5V voltage of 5V voltage process filtering to input.
3.3V be the peripheral circuit power supply of described microprocessor 203, first Floating-point DSP 201, second Floating-point DSP 204, also be the CPLD206 power supply.
1.8V be the kernel power supply of described microprocessor 203.
1.2V be the kernel power supply of described first Floating-point DSP 201 and second Floating-point DSP 204.
Two active crystal circuit of clock generation unit 210 are respectively two Floating-point DSP provides clock signal, two other passive crystal circuit is respectively microprocessor for master clock and auxiliary clock, satisfy the operation needs of microprocessor, for example clock signal clk A among Fig. 5 and CLKB are respectively first Floating-point DSP and second Floating-point DSP provides clock signal.Master clock signal and auxiliary clock signal that clock signal clk C and CLKD provide for microprocessor 203.
Preferably, described first Floating-point DSP 201 and second Floating-point DSP 204 all carry FLASH, SDRAM and jtag interface;
Described FLASH is used to store DSP program and service data;
Described SDRAM, the real time data that is used for storing dsp operation;
Described jtag interface is used for the download and the debugging of program.
Described microprocessor carries NOR FLASH, NAND FLASH, SDRAM and jtag interface;
Described NOR FLASH is used for storage operating system and application program;
Described NAND FLASH is used to store data and failure logging;
Described SDRAM, the internal memory that is used for microprocessor uses, and described operating system and application program are moved in this SDRAM.
Be that arm processor is an example below with the microprocessor, the operation principle of simple declaration real-time controller of universal frequency converter:
After system powered on, the DC/DC converter of power subsystem successively started and provides the various power supplys of controller needs according to pre-set order.Clock generation unit is respectively microprocessor, first Floating-point DSP and second Floating-point DSP clock signal is provided.First Floating-point DSP according to the clock that clock generation unit provides, is finished the initialization of oneself in the back that powers on.Its address wire, sheet choosing and read-write control signal are connected with CPLD respectively, by CPLD its control logic are carried out sequencing control and address decoder, finish the visit to the outside.
The working condition of second Floating-point DSP is the same substantially with first Floating-point DSP.First Floating-point DSP and second Floating-point DSP are under the control of CPLD, read outside voltage signal and current signal by himself outside expansion bus from data buffer unit, read control command, parameter setting of arm processor etc. simultaneously from the dual port RAM unit, then by the algorithm computing, produce the PWM control impuls and export, realize the real-time control of frequency converter by data buffer unit.
Arm processor according to the clock that clock generation unit provides, is finished oneself Vxworks system start-up and initialization in the back that powers on.Its address wire, sheet choosing and read-write control signal are connected with CPLD respectively, by CPLD its control logic are carried out sequencing control and address decoder, finish the visit to the outside.
Arm processor is set up with host computer or man-machine interface by RS485, Ethernet or PROFIBUS interface and is communicated by letter, and obtains control command and parameter, and uploads the various operation informations of universal frequency converter in real time.Arm processor connects by dual port RAM and Floating-point DSP, realizes the real-time exchange of data.Arm processor is under the control of CPLD, read the digital quantity that the outside is sent into by its outside expansion bus from data buffer unit, and the various control informations of comprehensively obtaining, produce the switch control logic signal, send from data buffer unit by its outside expansion bus, realize the switching logic control of universal frequency converter.
The embodiment of the invention also provides a kind of real-time controller of universal frequency converter that is used to realize inversion control, and referring to Fig. 6, this figure is the universal frequency converter provided by the invention another example structure schematic diagram of control in real time.
This real-time controller of universal frequency converter comprises: microprocessor 601, second Floating-point DSP 602 and second dual port RAM 603.
Described microprocessor 601 is used for by described second dual port RAM 603 control command information being sent to described second Floating-point DSP 602; And the operation information of described second Floating-point DSP 602 is sent to host computer by described second dual port RAM 603.
Described second Floating-point DSP 602 is used to read outside voltage signal and current signal, carries out the algorithm computing according to described voltage signal, current signal and control command information, produces the PWM control impuls by operation result, realizes inversion control.
Need to prove, when the high accuracy vector control that will carry out speed sensor or direct torque control, the closed-loop control of speed need be gathered and realize in system in real time to tach signal, at this moment second Floating-point DSP 602 reads outside voltage signal, current signal and rate signal, carry out the algorithm computing according to described voltage signal, current signal and rate signal, produce the PWM control impuls by operation result, realize closed-loop control.
Need to prove that the operation principle of the real-time controller of universal frequency converter that the real-time controller of universal frequency converter that present embodiment provides and Fig. 2 are corresponding is identical, the main distinction is, one is used to realize rectification control, realize inversion control for one, therefore, concrete operation principle does not repeat them here.
This real-time controller of universal frequency converter is realized the real-time control of universal frequency converter by microprocessor, second Floating-point DSP and second dual port RAM.Because second Floating-point DSP can be handled floating number, has precise computation ability, can finish complicated calculating according to voltage signal of gathering and current signal, produce the PWM control impuls by result of calculation, directly the PWM control impuls is exported, and can directly carry out exchanges data between second Floating-point DSP and the microprocessor, can guarantee higher control real-time like this.In addition, controller provided by the invention directly just can be realized the logic control of switching signal with microprocessor, and do not need that expensive PLC carries out the logic control of switching signal in the prior art, therefore, the cost of this real-time controller of universal frequency converter is lower.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention.Any those of ordinary skill in the art, do not breaking away under the technical solution of the present invention scope situation, all can utilize the method and the technology contents of above-mentioned announcement that technical solution of the present invention is made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solution of the present invention, all still belongs in the scope of technical solution of the present invention protection any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present invention.
Claims (10)
1. a real-time controller of universal frequency converter is characterized in that, comprising: first Floating-point DSP, first dual port RAM and microprocessor;
Described microprocessor is used for by described first dual port RAM control command information being sent to described first Floating-point DSP; And the operation information of described first Floating-point DSP is sent to host computer by described first dual port RAM;
Described first Floating-point DSP is used to read outside voltage signal and current signal, carries out the algorithm computing according to described voltage signal, current signal and control command information, produces the PWM control impuls by operation result, realizes rectification control.
2. real-time controller of universal frequency converter according to claim 1 is characterized in that, also comprises second Floating-point DSP and second dual port RAM;
Described microprocessor also is used for by described second dual port RAM described control command information being sent to described second Floating-point DSP; And the operation information of described second Floating-point DSP is sent to described host computer by described second dual port RAM;
Described second Floating-point DSP is used to read outside voltage signal and current signal, carries out the algorithm computing according to described voltage signal, current signal and control command information, produces the PWM control impuls by operation result, realizes inversion control.
3. real-time controller of universal frequency converter according to claim 2 is characterized in that, also comprises data buffer unit, and described first Floating-point DSP and second Floating-point DSP send to power cell with the PWM control impuls that produces by described data buffer unit.
4. real-time controller of universal frequency converter according to claim 3, it is characterized in that, also comprise the FPGA (Field Programmable Gate Array) control unit, be used for address signal, read-write and the chip selection signal of described microprocessor, first Floating-point DSP and second Floating-point DSP are deciphered, produce logic gating signal, direction control signal and the read-write of peripheral circuit, first dual port RAM, second dual port RAM, data buffer unit and the parallel bus interface of described microprocessor.
5. real-time controller of universal frequency converter according to claim 1 is characterized in that, described microprocessor hangs with Ethernet interface, RS485 interface, USB interface, UART interface, parallel bus interface and PROFIBUS interface.
6. real-time controller of universal frequency converter according to claim 1 is characterized in that, described first Floating-point DSP and second Floating-point DSP all carry FLASH, SDRAM and jtag interface;
Described FLASH is used to store DSP program and service data;
Described SDRAM, the real time data that is used for storing dsp operation;
Described jtag interface is used for the download and the debugging of program.
7. real-time controller of universal frequency converter according to claim 1 is characterized in that described microprocessor carries NOR FLASH, NAND FLASH, SDRAM and jtag interface;
Described NOR FLASH is used for storage operating system and application program;
Described NAND FLASH is used to store data and failure logging;
Described SDRAM, the internal memory that is used for microprocessor uses, and described operating system and application program are moved in this SDRAM.
8. real-time controller of universal frequency converter according to claim 4 is characterized in that, also comprises power subsystem, is used to provide 5V voltage, 3.3V voltage, 1.8V voltage and 1.2V voltage;
5V voltage provides digital 5V power supply later on through filtering;
3.3V be the peripheral circuit power supply of described microprocessor, first Floating-point DSP, second Floating-point DSP, also be described FPGA (Field Programmable Gate Array) control unit power supply;
1.8V be the kernel power supply of described microprocessor;
1.2V be the kernel power supply of described first Floating-point DSP and second Floating-point DSP.
9. real-time controller of universal frequency converter according to claim 4 is characterized in that, also comprises reset unit, is used to described microprocessor, first Floating-point DSP and second Floating-point DSP that reset signal is provided.
10. a real-time controller of universal frequency converter is characterized in that, comprises microprocessor, second Floating-point DSP and second dual port RAM;
Described microprocessor is used for by described second dual port RAM control command information being sent to described second Floating-point DSP; And the operation information of described second Floating-point DSP is sent to host computer by described second dual port RAM;
Described second Floating-point DSP is used to read outside voltage signal and current signal, carries out the algorithm computing according to described voltage signal, current signal and control command information, produces the PWM control impuls by operation result, realizes inversion control.
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| CN108803406B (en) * | 2018-04-04 | 2020-10-27 | 山东大学 | Task hierarchical control system and method for power battery testing and simulating instrument |
| CN110568781A (en) * | 2018-06-06 | 2019-12-13 | 中车株洲电力机车研究所有限公司 | Frequency converter controller |
| CN111078190A (en) * | 2019-11-13 | 2020-04-28 | 珠海格力电器股份有限公司 | Single-precision floating-point number arithmetic operation control system and method of small PLC |
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Application publication date: 20100804 |