CN103802841A - Electric locomotive traction control unit and control method - Google Patents
Electric locomotive traction control unit and control method Download PDFInfo
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- CN103802841A CN103802841A CN201210436252.XA CN201210436252A CN103802841A CN 103802841 A CN103802841 A CN 103802841A CN 201210436252 A CN201210436252 A CN 201210436252A CN 103802841 A CN103802841 A CN 103802841A
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Abstract
The invention provides an electric locomotive traction control unit and a control method. A peripheral processing chip processes input and output signals of an electric locomotive to acquire a drive control signal. The drive control signal is sent to an FPGA chip. The FPGA chip simultaneously receives a control command sent by a DSP chip used as a main processing chip. The FPGA chip carries out fault judgment on the drive control signal. If a judgment result is that the drive control signal does not have a fault, drive pulse is output to an IGBT in the electric locomotive according to the control command. According to the invention, the FPGA chip judges the drive control signal sent by the control drive pulse; if the FPGA chip judges that the drive control signal does not have a fault, the FPGA chip sends the drive pulse to the IGBT to drive the IGBT to work; if the FPGA chip judges that the drive control signal has a fault, the FPGA stops sending the drive pulse, so as to prevent the IGBT from damage under the condition of a burst fault of the electric locomotive; and the burning rate of the IGBT can be reduced.
Description
Technical field
The present invention relates to vehicle control technology, relate in particular to a kind of electric locomotive traction control unit and control method.
Background technology
Along with developing rapidly of traffic transport industry, the needs of electric locomotive also constantly increase, still, relatively less about the research of the central process unit (Central Processing Unit, referred to as CPU) of electric locomotive traction control unit.At present, the master mode of electric locomotive traction control unit CPU is mainly divided three classes: based on digital signal processing (Digital Signal Processing, referred to as DSP) chip is as main process chip, and micro controller system is as the master mode of associated treatment chip; Chip based on auspicious Sa (RENESAS) series is as the main process chip of CPU, micro controller system as associated treatment chip and based on dsp chip the main process chip as CPU, field programmable gate array (Field-Programmable GateArray, referred to as FPGA) chip is as associated treatment chip.
In actual application, in prior art based on dsp chip the main process chip as CPU, there is insulated gate bipolar transistor (Insulated GateBipolar Transistor, referred to as the IGBT) problem that burn-out rate is high as the master mode of associated treatment chip in FPGA.
Summary of the invention
The invention provides a kind of electric locomotive traction control unit and control method, in order to solve in prior art the main process chip as CPU based on DSP, there is as the master mode of associated treatment chip the problem that IGBT burn-out rate is high in FPGA.
To achieve these goals, the invention provides a kind of electric locomotive traction control unit, comprising:
As the digital signal processing dsp chip of main process chip, process as the on-site programmable gate array FPGA chip of associated treatment chip and input and output signal to described electric locomotive, obtain drive control signal, send the peripheral processes chip of described drive control signal to described fpga chip;
Described fpga chip comprises: for the Microprocessor Interface communicating with described dsp chip, be used for receiving described drive control signal, described drive control signal is carried out to fault judgement, judged result is sent to the fault judge module of pulse width modulation (PWM) signaling module and for being that described drive control signal is not while existing fault in the judged result of described fault judge module, the control command sending by described Microprocessor Interface according to described dsp chip, to the described pwm signal module of the insulated gate bipolar transistor IGBT output drive pulse in described electric locomotive, wherein, described drive control signal is to instigate described pwm signal module to export the signal of described drive pulse to described IGBT according to described control command,
Wherein, described fault judge module is connected with described peripheral processes chip and described pwm signal module; Described pwm signal module is also connected with described IGBT.
Electric locomotive traction control unit as above, it is characterized in that, described peripheral processes chip comprises analogue to digital conversion AD module, and described drive control signal comprises: the digital signal that described AD module is carried out analogue to digital conversion output to the analog signals of described electric locomotive input and output;
Described fpga chip also comprises: obtain first signal for the digital signal of described AD module output is carried out to filtering, and described first signal is sent to the digital filtering module of described fault judge module;
Described digital filtering module is connected with described AD module and described fault judge module.
Electric locomotive traction control unit as above, it is characterized in that, described peripheral processes chip comprises: level switch module, and described drive control signal comprises: described level switch module carries out to the digital quantity signal of described electric locomotive input and output the change over signal that level conversion obtains;
Described level switch module is connected with described fault judge module.
Electric locomotive traction control unit as above, it is characterized in that, described peripheral processes chip comprises IGBT feedback of status module, and described drive control signal comprises: described IGBT feedback of status module detects the status signal obtaining to the mode of operation of described IGBT;
Described FPGA also comprises: for the status signal to described IGBT feedback of status module output, carry out logical process, obtain secondary signal, described secondary signal is sent to the logic processing module of described fault judge module;
Described logic processing module is connected with described IGBT feedback of status module and described fault judge module.
Electric locomotive traction control unit as above, is characterized in that, described peripheral processes chip comprises power module, and described drive control signal comprises: the power supply signal of described power module output; Described fault judge module is also connected with described power module.
Electric locomotive traction control unit as above, is characterized in that, described peripheral processes chip comprises signal configures module, and described drive control signal comprises: the configuration signal of described signal configures module output; Described fault judge module is also connected with described signal configures module.
To achieve these goals, the invention provides a kind of control method of electric locomotive traction control unit, comprising:
Input and the output signal of peripheral processes chip to described electric locomotive processed, and obtains drive control signal, sends described drive control signal to on-site programmable gate array FPGA chip;
Digital signal processing dsp chip is to described fpga chip sending controling instruction, and realizes the core algorithm processing of described traction control unit;
Described fpga chip carries out fault judgement to described drive control signal, when judged result is described drive control signal while there is not fault, according to described control command to the insulated gate bipolar transistor IGBT output drive pulse in described electric locomotive; Wherein, described drive control signal is to instigate described fpga chip to export the signal of described drive pulse according to described control command.
The control method of electric locomotive traction control unit as above, it is characterized in that, described peripheral processes chip comprises analogue to digital conversion AD module, and described drive control signal comprises: the digital signal that described AD module is carried out analogue to digital conversion output to the analog signals of described electric locomotive input and output;
Input and the output signal of described peripheral processes chip to described electric locomotive processed, and obtains drive control signal, sends described drive control signal and comprises to on-site programmable gate array FPGA chip:
Described AD module is carried out analogue to digital conversion to the analog signals of described electric locomotive input and output and is exported described digital signal, and described digital signal is sent to described fpga chip;
Described fpga chip carries out fault judgement to described drive control signal and comprises:
Described fpga chip carries out filtering to described digital signal and obtains first signal, judges whether described first signal exists fault.
The control method of electric locomotive traction control unit as above, it is characterized in that, described peripheral processes chip comprises level switch module, and described drive control signal comprises: described level switch module carries out to the digital quantity signal of described electric locomotive input and output the change over signal that level conversion obtains;
Input and the output signal of described peripheral processes chip to described electric locomotive processed, and obtains drive control signal, sends described drive control signal and comprises to on-site programmable gate array FPGA chip:
The digital quantity signal of described electric locomotive input and output is carried out level conversion by described level switch module, obtains described change over signal, and described change over signal is sent to described fpga chip;
Described fpga chip carries out fault judgement to described drive control signal and comprises:
Described fpga chip judges whether described institute change over signal exists fault.
The control method of electric locomotive traction control unit as above, it is characterized in that, described peripheral processes chip comprises IGBT feedback of status module, and described drive control signal comprises: described IGBT feedback of status module detects the status signal obtaining to the mode of operation of described IGBT;
Input and the output signal of described peripheral processes chip to described electric locomotive processed, and obtains drive control signal, sends described drive control signal and comprises to on-site programmable gate array FPGA chip:
Described IGBT feedback of status module detects the mode of operation of described IGBT, obtains described status signal, and described status information is sent to described fpga chip;
Described fpga chip carries out logical process to described status signal, obtains secondary signal, judges whether described secondary signal exists fault.
The control method of electric locomotive traction control unit as above, is characterized in that, described peripheral processes chip comprises power module, and described drive control signal comprises: the power supply signal of described power module output;
Input and the output signal of described peripheral processes chip to described electric locomotive processed, and obtains drive control signal, sends described drive control signal and comprises to on-site programmable gate array FPGA chip:
Described power module sends described power supply signal to described fpga chip;
Described fpga chip judges whether described power supply signal exists fault.
The control method of electric locomotive traction control unit as above, is characterized in that, described peripheral processes chip comprises signal configures module, and described drive control signal comprises: the configuration signal of described signal configures module output;
Input and the output signal of described peripheral processes chip to described electric locomotive processed, and obtains drive control signal, sends described drive control signal and comprises to on-site programmable gate array FPGA chip:
Described configuration module sends described configuration signal to described fpga chip;
Described fpga chip judges whether described configuration signal exists fault.
Electric locomotive traction control unit provided by the invention and control method, input and output signal by peripheral processes chip to electric locomotive are processed, obtain drive control signal, drive control signal is sent to fpga chip, this fpga chip receives the control command sending as the dsp chip of main process chip simultaneously, and this drive control signal is used for making this FPGA to export drive pulse according to control command; This fpga chip carries out fault judgement to drive control signal, when judged result is drive control signal while there is not fault, according to control command to the IGBT output drive pulse in electric locomotive.The present invention judges the drive control signal of controlling drive pulse transmission by fpga chip, in the time that fpga chip is judged drive control signal and is not had fault, fpga chip sends drive pulse to IGBT, to drive IGBT to carry out work, and in the time that fpga chip is judged drive control signal and is had fault, fpga chip is the transmission of drives interrupts pulse, avoid occurring that in electric locomotive overvoltage, overcurrent or program error move the breaking-up to IGBT under the emergency case such as the IGBT upper and lower bridge arm causing leads directly to, thereby can reduce the burn-out rate of IGBT.
Accompanying drawing explanation
A kind of electric locomotive traction control unit structural representation that Fig. 1 provides for the embodiment of the present invention;
The another kind of electric traction control unit structural representation that Fig. 2 provides for the embodiment of the present invention;
The control method schematic diagram of a kind of electric locomotive traction control unit that Fig. 3 provides for the embodiment of the present invention.
The specific embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
A kind of electric locomotive traction control unit structural representation that Fig. 1 provides for the embodiment of the present invention.As shown in Figure 1, this traction control unit comprises: as the dsp chip 10 of main process chip, process as the fpga chip 20 of associated treatment chip and input and output signal to electric locomotive, obtain drive control signal, send the peripheral processes chip 30 of drive control signal to fpga chip 20.Wherein, fpga chip 20 comprises: for the Microprocessor Interface 21 communicating with dsp chip 10, be used for receiving drive control signal, drive control signal is carried out to fault judgement, judged result is sent to pulse width modulation (Pulse Width Modulation, referred to as PWM) the fault judge module 22 of signaling module 23 and for being that drive control signal is not while existing fault in the judged result of fault judge module 22, the control command sending by Microprocessor Interface 21 according to dsp chip 10, to the pwm signal module 23 of the IGBT output drive pulse in electric locomotive, wherein, drive control signal is to instigate pwm signal module 23 to export the signal of drive pulse to IGBT according to control command.
Particularly, dsp chip 10 is connected with electric locomotive, as the main process chip of traction control unit, realizes the computing of traction control unit core algorithm, for example, can realize vector controlled and the Direct Torque Control of traction control unit.Dsp chip 10 is also connected with fpga chip 20 by Microprocessor Interface 21, by this Microprocessor Interface 21 to pwm signal module 23 sending controling instructions in fpga chip 20, so that this pwm signal module 23 is processed accordingly according to control command.The related content that completes core algorithm computing about dsp chip 10 can, referring to relevant record of the prior art, repeat no more herein.
Wherein, peripheral processes chip 30 is connected with electric locomotive, gather input and the output signal of electric locomotive, and the data that collect are processed accordingly, obtain drive control signal, for example, peripheral processes chip 30 can be to analog signals such as electric current, voltages in electric locomotive traction control unit before entering fpga chip 20, carry out high-frequency filtering processing, can also carry out the processing such as voltage transitions to the digital quantity signal of the input of electric locomotive traction control unit and output.This peripheral processes chip 30 is also connected with fpga chip 20, and drive control signal is input to the fault judge module 22 in fpga chip 20.Fault judge module 22 carries out fault judgement to drive control signal, and judged result is sent to pwm signal module 23, for example, fault judge module 22 can detect analog signalses such as inner power fail, reset mode detection, IGBT driving condition signal, excess temperature, overvoltage, overcurrent, under-voltage or undercurrents.The judged result of exporting when fault judge module 22 is that drive control signal is not while existing fault, the control command that pwm signal module 23 sends by Microprocessor Interface 21 according to dsp chip 10, IGBT device in electric locomotive is exported drive pulse, to drive the normal operation of IGBT device; And the judged result of exporting when fault judge module 22 is while being drive control signal et out of order, pwm signal module 23 stops sending drive pulse to IGBT device, thereby can guarantee the safety in the course of the work of IGBT device, avoid causing IGBT device destroyed in the situation that catastrophic failure appears in electric locomotive, reach the object of the burn-out rate that reduces IGBT.Preferably, in the present embodiment, fault judge module 22 can compare drive control signal and the protection setting in advance threshold value, and wherein, this protection threshold value can arrange according to the performance perameter of electric locomotive.When drive control signal is higher than protection threshold value, drive control signal et out of order is described, there is fault in some parts in electric locomotive, and pwm signal module 23 stops sending drive pulse, thereby effectively protects IGBT and other high tension apparatus; And when drive control signal is less than or equal to protection threshold value, illustrating that drive control signal does not exist fault, the normal drive pulse that sends of pwm signal module 23, to drive IGBT, can normally work IGBT.
The electric locomotive traction control unit that the present embodiment provides, input and output signal by peripheral processes chip to electric locomotive are processed, obtain drive control signal, drive control signal is sent to fpga chip, fpga chip receives the control command sending as the dsp chip of main process chip simultaneously, and this drive control signal is used for making this fpga chip to export drive pulse according to control command; This fpga chip carries out fault judgement to drive control signal, when judged result is drive control signal while there is not fault, according to control command to the IGBT output drive pulse in electric locomotive.The present embodiment carries out fault judgement by fpga chip to the drive control signal of controlling drive pulse transmission, in the time that fpga chip is judged drive control signal and is not had fault, fpga chip sends drive pulse to IGBT, to drive IGBT to carry out work, and in the time that fpga chip is judged drive control signal and is had fault, fpga chip is the transmission of drives interrupts pulse, avoid occurring in electric locomotive that overvoltage, overcurrent or program error move under the emergency case such as the IGBT upper and lower bridge arm that causes is straight-through and cause the breaking-up to IGBT, thereby can reduce the burn-out rate of IGBT.
The another kind of electric locomotive traction control unit structural representation that Fig. 2 provides for the embodiment of the present invention.As shown in Figure 2, this traction control unit comprises: as the dsp chip 10 of main process chip, process as the fpga chip 20 of associated treatment chip and input and output signal to electric locomotive, obtain drive control signal, send the peripheral processes chip 30 of drive control signal to fpga chip 20.
Particularly, dsp chip 10 is connected with electric locomotive, as the main process chip of traction control unit, realizes the computing of traction control unit core algorithm, for example, can realize vector controlled and the Direct Torque Control of traction control unit.Dsp chip 10 is also connected with fpga chip 20, to fpga chip 20 sending controling instructions, so that this pwm signal module 23 is processed accordingly according to control command.The related content that completes core algorithm computing about dsp chip 10 can, referring to relevant record of the prior art, repeat no more herein.
Wherein, a kind of implementation structure of fpga chip 20 is except comprising: Microprocessor Interface 21, fault judge module 22 and pwm signal module 23, can also comprise with any or its combination in lower module: several signals that peripheral process chip 30 is exported carry out filtering processing, obtain first signal, the status signal of the IGBT that first signal is sent to the digital filtering module 24 of fault judge module 23 and peripheral process chip 30 is exported, carry out logical process, obtain secondary signal, secondary signal is sent to the logic processing module 25 of fault judge module 22.Accordingly, peripheral processes chip 30 can comprise: to the analog signals of electric locomotive input and output, carry out analog-to-digital conversion process, the analogue to digital conversion AD module 31 of output digit signals and/or the digital quantity signal that electric locomotive is inputted and exported carry out the change over signal that level conversion obtains, and change over signal are sent to the level switch module 32 of fault judge module 22.In addition, external treatment chip 30 is except comprising AD module 31 and level switch module 32, can also comprise any or its combination with lower module: the mode of operation to IGBT detects, obtain IGBT feedback of status module 33, power module 34 and the configuration module 35 of status signal.
Based on above-mentioned, in the present embodiment, be input to drive control signal in fault judge module 22 and include but not limited to following any or its combination: the digital signal that AD module 31 is carried out analogue to digital conversion output to the analog signals of electric locomotive input and output, level switch module 32 carries out to the digital quantity signal of electric locomotive input and output the change over signal that level conversion obtains, IGBT feedback of status module 33 detects the status signal obtaining to the mode of operation of IGBT, the configuration signal that the power supply signal that power module 34 is exported and signal configures module 35 are exported.
Wherein, in peripheral processes chip 30, AD module 31 is connected with digital filtering module 24, this AD module 31 and the analog signals to electric locomotive input and output, carry out analogue to digital conversion, obtain digital signal, this digital signal is sent to digital filtering module 24, this digital filtering module 24 can be realized the digital signal of input is carried out to digital filter, remove the high-frequency signal part in digital signal, obtain first signal.This digital filtering module 24 is also connected with fault judge module 22, sends to fault judge module 22 using first signal as drive control signal, and fault judge module 22 carries out fault judgement to first signal.In the time of first signal et out of order, pwm signal module 23 stops sending drive pulse, thereby effectively protects IGBT and other high tension apparatus.
In peripheral processes chip 30, level switch module 32 carries out level conversion to the digital quantity signal of electric locomotive input and output, obtain change over signal, for example, because the voltage of fpga chip is low voltage, and the voltage of electric locomotive input and output is high potential, so just need level switch module 32 that the high voltage signal of electric locomotive input and output is converted to low voltage signal.Level switch module 32 is connected with fault judge module 22, and level switch module 32 is input to change over signal as drive control signal in fault judge module 22, and fault judge module 22 carries out fault judgement to change over signal.In the time of change over signal et out of order, pwm signal module 23 stops sending drive pulse, thereby effectively protects IGBT and other high tension apparatus.
Further, IGBT feedback of status module 33 in peripheral processes chip 30 is connected with IGBT, mode of operation to IGBT detects, obtain the status signal of IGBT, IGBT feedback of status module 33 is also connected with the logic processing module 25 in fpga chip 20, and the status signal of IGBT is sent to logic processing module 25.Logic processing module 25 is connected with fault judge module 22, logic processing module 25 is carried out logical process to status signal, obtain secondary signal, particularly, logic processing module 25 can be processed into high and low level by rule in this status signal or fitfull impulse singla.This logic processing module 25 also sends to fault judge module 22 using secondary signal as drive control signal, fault judge module 22 carries out fault judgement to status signal.In the time of secondary signal et out of order, pwm signal module 23 stops sending drive pulse, thereby effectively protects IGBT and other high tension apparatus.Alternatively, logic processing module 25 can also latch secondary signal.
Further, power module 34 in peripheral processes chip 30 is connected with electric locomotive, obtain the power supply signal of electric locomotive output, power module 34 is also connected with fault judge module 22, send to fault judge module 22 using the power supply signal obtaining as drive control signal, fault judge module 22 carries out fault judgement to power supply signal.For example, in the time of power module 34 normal work, the power supply signal of output is a high level, and in the time of power module 34 et out of order, low level signal of power supply signal of output, fault judge module 22 compares with default level value by the level value of this power supply signal is carried out, when the level value of this power supply signal is during higher than default level value, illustrate that this power supply signal is a high level signal, fault judge module 22 judges that this power supply signal does not exist fault, and when the level value of this power supply signal is during lower than default level value, illustrate that this power supply signal is a low level signal, fault judge module 22 judges that this power supply signal exists fault, pwm signal module stops sending drive pulse, can play to IGBT device the effect of protection.Signal configures module 35 in peripheral processes chip 30 is connected with fault judge module 22, and signal configures module 35 sends to fault judge module 22 using configuration signal as drive control signal, and fault judge module 22 carries out fault judgement to configuration signal.This configuration signal is to set according to the real work situation of electric locomotive, as, the configuration signal such as input voltage, electric current, output voltage, electric current, motor temperature, main transformer temperature, water temperature or the hydraulic pressure of the electric locomotive of setting.Particularly; fault judge module 22 can compare configuration signal and default protection value, in the time that configuration signal is greater than default protection value, while being judged as this configuration signal et out of order; pwm signal module 23 stops sending drive pulse, thereby effectively protects IGBT and other high tension apparatus.
In this enforcement, after fault judge module 22 judges five drive control signal, if there is fault at least one drive control signal of judging in five drive control signal, illustrate that electric locomotive breaks down, pwm signal module 23 stops sending drive pulse to IGBT, avoid IGBT damaged in the situation that catastrophic failure appears in electric locomotive, can reduce the burn-out rate of IGBT.In the present embodiment, only having the judged result of exporting when fault judge module 22 is that five drive control signal are not while all existing fault, the control command that pwm signal module 23 just can be sent according to dsp chip 10, sends drive pulse to IGBT, to drive IGBT normally to work.In the present embodiment, before drive pulse arrives IGBT, can be according to the correlation parameter of IGBT; such as minimum is led shut, frequency etc.; drive pulse is processed, made the drive pulse that is input to IGBT reach best, thereby can better protect IGBT device.Further, in the time that fault judge module 22 is judged one of them drive control signal and is not had fault, the drive control signal that does not have fault can also be sent and sends to dsp chip 10 by Microprocessor Interface 21, so that dsp chip 10 carries out related operation processing.
Alternatively, a register module can also be set in fpga chip 20, for storing driver control signal, so that subsequent query or call.Further, fpga chip 20 can also comprise a digital quantity output module, this digital quantity goes out module can receive the Control instruction that dsp chip 10 sent, this digital output module is decoded this Control instruction, output logic level is to control adhesive and the disconnection of electric locomotive repeat circuit, for example, low level disconnects, high level adhesive.
The electric locomotive traction control unit that the present embodiment provides, input and output signal by peripheral processes chip to electric locomotive are processed, obtain drive control signal, drive control signal is sent to fpga chip, fpga chip receives the control command sending as the dsp chip of main process chip simultaneously, and this drive control signal is used for making this fpga chip to export drive pulse according to control command; This fpga chip carries out fault judgement to drive control signal, when judged result is drive control signal while there is not fault, according to control command to the IGBT output drive pulse in electric locomotive.The present embodiment carries out fault judgement by fpga chip to the drive control signal of controlling drive pulse transmission, in the time that fpga chip is judged drive control signal and is not had fault, fpga chip sends drive pulse to IGBT, to drive IGBT to carry out work, and in the time that fpga chip is judged drive control signal and is had fault, fpga chip is the transmission of drives interrupts pulse, avoid occurring in electric locomotive that overvoltage, overcurrent or program error move under the emergency case such as the IGBT upper and lower bridge arm that causes is straight-through and cause the breaking-up to IGBT, thereby can reduce the burn-out rate of IGBT.
Further, have the features such as two-forty, extendability are strong, good confidentiality due to FPGA, therefore, FPGA can replace traditional analogous circuit.In the present embodiment, also by utilizing the data-handling capacity that FPGA is powerful, can complete the functions such as external logic control, drive pulse triggering and dead band control, thereby greatly save the resource of DSP, and DSP can only be used for realizing the core algorithm processing of traction control unit as main process chip, thereby can improve the integrated level of pull-in control system system control cpu, strengthen the stability of cpu system.
The control method schematic diagram of a kind of electric locomotive traction control unit that Fig. 3 provides for the embodiment of the present invention.As shown in Figure 3, the control method of this electric locomotive traction control unit comprises the steps:
301, input and the output signal of peripheral processes chip to described electric locomotive processed, and obtains drive control signal, sends described drive control signal to on-site programmable gate array FPGA chip.
Peripheral processes chip is connected with electric locomotive, gather input and the output signal of electric locomotive, and the data that collect are processed accordingly, obtain drive control signal, for example, peripheral processes chip can, to analog signals such as electric current, voltages in electric locomotive traction control unit before entering fpga chip, carry out high-frequency filtering processing, can also carry out the processing such as voltage transitions to the digital quantity signal of the input of electric locomotive traction control unit and output.This peripheral processes chip is also connected with fpga chip, and drive control signal is input to the fault judge module in fpga chip.
302, digital signal processing dsp chip is to described fpga chip sending controling instruction, and realizes the core algorithm processing of described traction control unit.
Dsp chip is connected with electric locomotive, as the main process chip of traction control unit, realizes the computing of traction control unit core algorithm, for example, can realize vector controlled and the Direct Torque Control of traction control unit.Dsp chip is also connected with this fpga chip by the Microprocessor Interface in fpga chip, by this Microprocessor Interface to the pwm signal module sending controling instruction in fpga chip, so that this pwm signal module is processed accordingly according to control command.The related content that completes core algorithm computing about dsp chip can, referring to relevant record of the prior art, repeat no more herein.
303, described fpga chip carries out fault judgement to described drive control signal, when judged result is described drive control signal while there is not fault, according to described control command to the insulated gate bipolar transistor IGBT output drive pulse in described electric locomotive; Wherein, described drive control signal is to instigate described fpga chip to export the signal of described drive pulse according to described control command.
There is the drive control signal of coming in the fault judge module receiving step 301 in fpga chip, fault judge module carries out fault judgement to drive control signal, and judged result is sent to the pwm signal module in this fpga chip, for example, fault judge module can detect analog signalses such as inner power fail, reset mode detection, IGBT driving condition signal, excess temperature, overvoltage, overcurrent, under-voltage or undercurrents.When the judged result of fault judge module output is that drive control signal is not while existing fault, the control command that pwm signal module sends by Microprocessor Interface according to dsp chip, IGBT device in electric locomotive is exported drive pulse, to drive the normal operation of IGBT device; And in the time that the judged result of fault judge module output is drive control signal et out of order, pwm signal module stops sending drive pulse to IGBT device, thereby can guarantee the safety in the course of the work of IGBT device, avoid causing IGBT device destroyed in the situation that catastrophic failure appears in electric locomotive, reach the object of the burn-out rate that reduces IGBT.
Preferably, in the present embodiment, fault judge module can compare drive control signal and the protection setting in advance threshold value, and wherein, this protection threshold value can arrange according to the performance perameter of electric locomotive.When drive control signal is higher than protection threshold value, drive control signal et out of order is described, there is fault in some parts in electric locomotive, and pwm signal module stops sending drive pulse, thereby effectively protects IGBT and other high tension apparatus; And when drive control signal is lower than protection threshold value, illustrating that drive control signal does not exist fault, pwm signal module normally sends drive pulse, to drive the normal work of IGBT.
The electric locomotive traction control unit that the present embodiment provides, input and output signal by peripheral processes chip to electric locomotive are processed, obtain drive control signal, drive control signal is sent to fpga chip, fpga chip receives the control command sending as the dsp chip of main process chip simultaneously, and this drive control signal is used for making this fpga chip to export drive pulse according to control command; This fpga chip carries out fault judgement to drive control signal, when judged result is drive control signal while there is not fault, according to control command to the IGBT output drive pulse in electric locomotive.The present embodiment carries out fault judgement by fpga chip to the drive control signal of controlling drive pulse transmission, in the time that fpga chip is judged drive control signal and is not had fault, fpga chip sends drive pulse to IGBT, to drive IGBT to carry out work, and in the time that fpga chip is judged drive control signal and is had fault, fpga chip is the transmission of drives interrupts pulse, avoid occurring in electric locomotive that overvoltage, overcurrent or program error move under the emergency case such as the IGBT upper and lower bridge arm that causes is straight-through and cause the breaking-up to IGBT, thereby can reduce the burn-out rate of IGBT.
Particularly, in the present embodiment, the drive control signal that is input to the fault judge module in fpga chip includes but not limited to following any or its combination: the digital signal that the AD module in peripheral processes chip is carried out analogue to digital conversion output to the analog signals of electric locomotive input and output, level switch module in peripheral processes chip carries out to the digital quantity signal of electric locomotive input and output the change over signal that level conversion obtains, IGBT feedback of status module in peripheral processes chip detects the status signal obtaining to the mode of operation of IGBT, the configuration signal of the signal configures module output in power supply signal and the peripheral processes chip of the power module output in peripheral processes chip.
Wherein, if peripheral processes chip comprises analogue to digital conversion AD module, drive control signal comprises: the digital signal that AD module is carried out analogue to digital conversion output to the analog signals of electric locomotive input and output.Based on this, input and the output signal of peripheral processes chip to electric locomotive processed, obtain drive control signal, sending drive control signal comprises to the process of the fpga chip as associated treatment chip: AD module is carried out analogue to digital conversion output digit signals to the analog signals of electric locomotive input and output, and this digital signal is sent to fpga chip.Correspondingly, fpga chip carries out fault judgement to drive control signal and comprises: fpga chip carries out filtering to this digital signal and obtains first signal, judges whether this first signal exists fault.Concrete, AD module is connected with the digital filtering module in fpga chip, this AD module and the analog signals to electric locomotive input and output, carry out analogue to digital conversion, obtain digital signal, this digital signal is sent to digital filtering module, this digital filtering module can be realized the digital signal of input is carried out to digital filter, remove the high-frequency signal part in digital signal, obtain first signal.This digital filtering module is also connected with fault judge module, sends to fault judge module using first signal as drive control signal, and fault judge module carries out fault judgement to first signal.In the time of first signal et out of order, pwm signal module stops sending drive pulse, thereby effectively protects IGBT and other high tension apparatus.
If peripheral processes chip comprises level switch module, drive control signal comprises: the digital signal that level switch module carries out analogue to digital conversion output to the analog signals of electric locomotive input and output.Based on this, input and the output signal of peripheral processes chip to electric locomotive processed, obtain drive control signal, sending drive control signal comprises to the process of the fpga chip as associated treatment chip: the digital quantity signal of electric locomotive input and output is carried out level conversion by level switch module, obtain change over signal, this change over signal is sent to fpga chip; Correspondingly, fpga chip carries out fault judgement to drive control signal and comprises: fpga chip judges whether this change over signal exists fault.Concrete, level switch module carries out level conversion to the digital quantity signal of electric locomotive input and output, obtain change over signal, for example, because the voltage of fpga chip is low voltage, and the voltage of electric locomotive input and output is high potential, so just need level switch module that the high voltage signal of electric locomotive input and output is converted to low voltage signal.Level switch module is connected with fault judge module, and level switch module is input to change over signal as drive control signal in fault judge module, and fault judge module carries out fault judgement to change over signal.In the time of change over signal et out of order, pwm signal module stops sending drive pulse, thereby effectively protects IGBT and other high tension apparatus.
Further, if peripheral processes chip comprises IGBT feedback of status module, drive control signal comprises: IGBT feedback of status module detects the status signal obtaining to the mode of operation of IGBT.Based on this, input and the output signal of peripheral processes chip to electric locomotive processed, obtain drive control signal, sending drive control signal comprises to the process of the fpga chip as associated treatment chip: IGBT feedback of status module detects the mode of operation of IGBT, obtain status signal, this status signal is sent to fpga chip; Correspondingly, fpga chip carries out fault judgement to drive control signal and comprises: fpga chip carries out logical process to this status signal, obtains secondary signal, judges whether this secondary signal exists fault.Particularly, IGBT feedback of status module is connected with IGBT, and the mode of operation of IGBT is detected, and obtains the status signal of IGBT.IGBT feedback of status module is also connected with the logic processing module in fpga chip, and the status signal of IGBT is sent to logic processing module.Logic processing module is connected with fault judge module, and logic processing module is carried out logical process to status signal, obtains secondary signal, and particularly, logic processing module can be processed into high and low level by rule in this status signal or fitfull impulse singla.Logic processing module also sends to fault judge module using secondary signal as drive control signal, fault judge module carries out fault judgement to status signal.In the time of secondary signal et out of order, pwm signal module stops sending drive pulse, thereby effectively protects IGBT and other high tension apparatus.Alternatively, logic processing module can also latch secondary signal.
Further, if peripheral processes chip comprises power module, drive control signal comprises: the power supply signal of power module output.Based on this, input and the output signal of peripheral processes chip to electric locomotive processed, obtain drive control signal, send drive control signal and comprise to the process of the fpga chip as associated treatment chip: power supply signal is sent to fpga chip by power module; Correspondingly, fpga chip carries out fault judgement to drive control signal and comprises: fpga chip judges whether this power supply signal exists fault.Particularly, power module is connected with electric locomotive, obtains the power supply signal of electric locomotive output, and power module is also connected with fault judge module, send to fault judge module using the power supply signal obtaining as drive control signal, fault judge module carries out fault judgement to power supply signal.For example, in the time that power module is normally worked, the power supply signal of output is a high level, and in the time of power module et out of order, low level signal of power supply signal of output, fault judge module compares with default level value by the level value of this power supply signal is carried out, when the level value of this power supply signal is during higher than default level value, illustrate that this power supply signal is a high level signal, fault judge module judges that this power supply signal does not exist fault, and when the level value of this power supply signal is during lower than default level value, illustrate that this power supply signal is a low level signal, fault judge module judges that this power supply signal exists fault, pwm signal module stops sending drive pulse, can play to IGBT device the effect of protection.
If peripheral processes chip comprises signal configures module, drive control signal comprises: the configuration signal of signal configures module output.Based on this, input and the output signal of peripheral processes chip to electric locomotive processed, obtain drive control signal, send drive control signal and comprise to the process of the fpga chip as associated treatment chip: configuration signal is sent to fpga chip by signal configures module; Correspondingly, fpga chip carries out fault judgement to drive control signal and comprises: fpga chip judges whether this configuration signal exists fault.Signal configures module is connected with fault judge module, sends to fault judge module using configuration signal as drive control signal, and fault judge module carries out fault judgement to configuration signal.This configuration signal is to set according to the real work situation of electric locomotive, as, the configuration signal such as input voltage, electric current, output voltage, electric current, motor temperature, main transformer temperature, water temperature or the hydraulic pressure of the electric locomotive of setting.Particularly; fault judge module 22 can compare configuration signal and default protection value, in the time that configuration signal is greater than default protection value, while being judged as this configuration signal et out of order; pwm signal module 23 stops sending drive pulse, thereby effectively protects IGBT and other high tension apparatus.
Alternatively, fpga chip can also storing driver control signal, so that subsequent query or call.Further, fpga chip can also receive the Control instruction that dsp chip sent, and this digital output module is decoded this Control instruction, output logic level is to control adhesive and the disconnection of electric locomotive repeat circuit, for example, low level disconnects, high level adhesive.
In this enforcement, after fault judge module judges five drive control signal, if there is fault at least one drive control signal of judging in five drive control signal, illustrate that electric locomotive breaks down, pwm signal module stops sending drive pulse to IGBT, avoid IGBT damaged in the situation that catastrophic failure appears in electric locomotive, can reduce the burn-out rate of IGBT.In the present embodiment, only have when the judged result of fault judge module output be that five drive control signal are not while all existing fault, the control command that pwm signal module just can be sent according to dsp chip, sends drive pulse to IGBT, to drive IGBT normally to work.In the present embodiment, before drive pulse arrives IGBT, can be according to the correlation parameter of IGBT; such as minimum is led shut, frequency etc.; drive pulse is processed, made the drive pulse that is input to IGBT reach best, thereby can better protect IGBT device.Further, in the time that fault judge module is judged one of them drive control signal and do not had fault, the drive control signal that does not have fault can also be sent and send to dsp chip by Microprocessor Interface, so that dsp chip carries out related operation processing.
Further, have the features such as two-forty, extendability are strong, good confidentiality due to FPGA, therefore, FPGA can replace traditional analogous circuit.In the present embodiment, also by utilizing the data-handling capacity that FPGA is powerful, can complete the functions such as external logic control, drive pulse triggering and dead band control, thereby greatly save the resource of DSP, and DSP can only be used for realizing the core algorithm processing of traction control unit as main process chip, thereby can improve the integrated level of pull-in control system system control cpu, strengthen the stability of cpu system.
Finally it should be noted that: above each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit; 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 (12)
1. an electric locomotive traction control unit, it is characterized in that, comprise: as the digital signal processing dsp chip of main process chip, process as the on-site programmable gate array FPGA chip of associated treatment chip and input and output signal to described electric locomotive, obtain drive control signal, and send the peripheral processes chip of described drive control signal to described fpga chip;
Described fpga chip comprises: for the Microprocessor Interface communicating with described dsp chip, be used for receiving described drive control signal, described drive control signal is carried out to fault judgement, judged result is sent to the fault judge module of pulse width modulation (PWM) signaling module and for being that described drive control signal is not while existing fault in the judged result of described fault judge module, the control command sending by described Microprocessor Interface according to described dsp chip, to the described pwm signal module of the insulated gate bipolar transistor IGBT output drive pulse in described electric locomotive, wherein, described drive control signal is to instigate described pwm signal module to export the signal of described drive pulse to described IGBT according to described control command,
Wherein, described fault judge module is connected with described peripheral processes chip and described pwm signal module; Described pwm signal module is also connected with described IGBT.
2. electric locomotive traction control unit according to claim 1, it is characterized in that, described peripheral processes chip comprises analogue to digital conversion AD module, and described drive control signal comprises: the digital signal that described AD module is carried out analogue to digital conversion output to the analog signals of described electric locomotive input and output;
Described fpga chip also comprises: obtain first signal for the digital signal of described AD module output is carried out to filtering, and described first signal is sent to the digital filtering module of described fault judge module;
Described digital filtering module is connected with described AD module and described fault judge module.
3. electric locomotive traction control unit according to claim 1, it is characterized in that, described peripheral processes chip comprises: for the digital quantity signal of described electric locomotive input and output is carried out to the change over signal that level conversion obtains, and described change over signal being sent to the level switch module of described fault judge module, described drive control signal comprises: described level switch module carries out to the digital quantity signal of described electric locomotive input and output the change over signal that level conversion obtains;
Described level switch module is connected with described fault judge module.
4. according to the electric locomotive traction control unit described in claim 1 or 2 or 3, it is characterized in that, described peripheral processes chip comprises IGBT feedback of status module, and described drive control signal comprises: described IGBT feedback of status module detects the status signal obtaining to the mode of operation of described IGBT;
Described FPGA also comprises: for the status signal to described IGBT feedback of status module output, carry out logical process, obtain secondary signal, described secondary signal is sent to the logic processing module of described fault judge module;
Described logic processing module is connected with described IGBT feedback of status module and described fault judge module.
5. according to the electric locomotive traction control unit described in right 1 or 2 or 3, it is characterized in that, described peripheral processes chip comprises power module, and described drive control signal comprises: the power supply signal of described power module output; Described fault judge module is connected with described power module.
6. according to the electric locomotive traction control unit described in right 1 or 2 or 3, it is characterized in that, described peripheral processes chip comprises signal configures module, and described drive control signal comprises: the configuration signal of described signal configures module output; Described fault judge module is connected with described signal configures module.
7. a control method for electric locomotive traction control unit, is characterized in that, comprising:
Input and the output signal of peripheral processes chip to described electric locomotive processed, and obtains drive control signal, sends described drive control signal to the on-site programmable gate array FPGA chip as associated treatment chip;
To described fpga chip sending controling instruction, and realize the core algorithm processing of described traction control unit as the digital signal processing dsp chip of main process chip;
Described fpga chip carries out fault judgement to described drive control signal, when judged result is described drive control signal while there is not fault, according to described control command to the insulated gate bipolar transistor IGBT output drive pulse in described electric locomotive; Wherein, described drive control signal is to instigate described fpga chip to export the signal of described drive pulse according to described control command.
8. the control method of electric locomotive traction control unit according to claim 7, it is characterized in that, described peripheral processes chip comprises analogue to digital conversion AD module, and described drive control signal comprises: the digital signal that described AD module is carried out analogue to digital conversion output to the analog signals of described electric locomotive input and output;
Input and the output signal of described peripheral processes chip to described electric locomotive processed, and obtains drive control signal, sends described drive control signal and comprises to the on-site programmable gate array FPGA chip as associated treatment chip:
Described AD module is carried out analogue to digital conversion to the analog signals of described electric locomotive input and output and is exported described digital signal, and described digital signal is sent to described fpga chip;
Described fpga chip carries out fault judgement to described drive control signal and comprises:
Described fpga chip carries out filtering to described digital signal and obtains first signal, judges whether described first signal exists fault.
9. the control method of electric locomotive traction control unit according to claim 8, it is characterized in that, described peripheral processes chip comprises level switch module, and described drive control signal comprises: described level switch module carries out to the digital quantity signal of described electric locomotive input and output the change over signal that level conversion obtains;
Input and the output signal of described peripheral processes chip to described electric locomotive processed, and obtains drive control signal, sends described drive control signal and comprises to the on-site programmable gate array FPGA chip as associated treatment chip:
The digital quantity signal of described electric locomotive input and output is carried out level conversion by described level switch module, obtains described change over signal, and described change over signal is sent to described fpga chip;
Described fpga chip carries out fault judgement to described drive control signal and comprises:
Described fpga chip judges whether described institute change over signal exists fault.
10. according to the control method of the electric locomotive traction control unit described in claim 7 or 8 or 9, it is characterized in that, described peripheral processes chip comprises IGBT feedback of status module, and described drive control signal comprises: described IGBT feedback of status module detects the status signal obtaining to the mode of operation of described IGBT;
Input and the output signal of described peripheral processes chip to described electric locomotive processed, and obtains drive control signal, sends described drive control signal and comprises to the on-site programmable gate array FPGA chip as associated treatment chip:
Described IGBT feedback of status module detects the mode of operation of described IGBT, obtains described status signal, and described status information is sent to described fpga chip;
Described fpga chip carries out fault judgement to described drive control signal and comprises:
Described fpga chip carries out logical process to described status signal, obtains secondary signal, judges whether described secondary signal exists fault.
11. according to the control method of the electric locomotive traction control unit described in right 7 or 8 or 9, it is characterized in that, described peripheral processes chip comprises power module, and described drive control signal comprises: the power supply signal of described power module output;
Input and the output signal of described peripheral processes chip to described electric locomotive processed, and obtains drive control signal, sends described drive control signal and comprises to the on-site programmable gate array FPGA chip as associated treatment chip:
Described power module sends described power supply signal to described fpga chip;
Described fpga chip carries out fault judgement to described drive control signal and comprises:
Described fpga chip judges whether described power supply signal exists fault.
12. according to the control method of the electric locomotive traction control unit described in right 7 or 8 or 9, it is characterized in that, described peripheral processes chip comprises signal configures module, and described drive control signal comprises: the configuration signal of described signal configures module output;
Input and the output signal of described peripheral processes chip to described electric locomotive processed, and obtains drive control signal, sends described drive control signal and comprises to the on-site programmable gate array FPGA chip as associated treatment chip:
Described configuration module sends described configuration signal to described fpga chip;
Described fpga chip carries out fault judgement to described drive control signal and comprises:
Described fpga chip judges whether described configuration signal exists fault.
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