CN111746592A - Safe driving method and safe driving module for node-free three-phase alternating current point switch - Google Patents
Safe driving method and safe driving module for node-free three-phase alternating current point switch Download PDFInfo
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- CN111746592A CN111746592A CN202010641185.XA CN202010641185A CN111746592A CN 111746592 A CN111746592 A CN 111746592A CN 202010641185 A CN202010641185 A CN 202010641185A CN 111746592 A CN111746592 A CN 111746592A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
- B61L5/06—Electric devices for operating points or scotch-blocks, e.g. using electromotive driving means
- B61L5/065—Construction of driving mechanism
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/09—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against over-voltage; against reduction of voltage; against phase interruption
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/26—Power factor control [PFC]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention discloses a safe driving method and a safe driving module of a node-free three-phase alternating current point switch, wherein the driving method comprises the steps of obtaining 220V alternating current beside a rail, and outputting 600V direct current after filtering rectification and direct current boost conversion are carried out on the 220V alternating current beside the rail; the first drive control module detects input information and output information of the direct current boost conversion to control the output of the direct current boost conversion; the three-phase inverter circuit converts the 600V direct current into 380V three-phase alternating current to supply power for the three-phase alternating current switch machine; the acquisition detection circuit acquires and detects the voltage value and the three-phase current value output by the three-phase inverter circuit; and the safety logic control module detects whether the voltage value and the three-phase current value are normal or not so as to determine whether to drive the three-phase alternating current switch machine to act or not. The safe driving method is adopted to realize the non-node, low-cost, safe and reliable trackside control of the three-phase alternating current point switch, effectively ensure the safety of operators and reduce the damage of power devices.
Description
Technical Field
The invention belongs to the field of rail transit, and particularly relates to a safe driving method and a safe driving module for a node-free three-phase alternating current point switch.
Background
At present, the existing railway signal control system is usually installed indoors, and the indoor control system and the outdoor controlled equipment communicate through a signal cable, but the indoor centralized control mode has the defects of difficult maintenance, high cost and the like. In addition, the railway signal control system also comprises a trackside control mode, and along with the increasing requirements on the safety and reliability of the railway transportation system, the research and development of trackside equipment with high safe and reliable operation capability becomes increasingly important. The point switch is used as a core device for switching and locking the turnout of the railway vehicle, and plays an important role in ensuring the running safety of the railway and improving the transportation efficiency. In practical application, the three-phase alternating current switch has the advantages of sufficient power, low motor failure rate, small maintenance workload and the like, and is widely applied to railway transportation systems. However, most of the existing three-phase ac switch machine safety driving modules adopt a centralized control mode and need 380V ac power supply, a special power supply circuit needs to be laid to supply power to the driving modules, and a relay is used for controlling output, so that the cost of the driving modules is increased and the volume of a system hardware circuit is increased due to the use of the relay control. Therefore, the development of a safe driving module of a non-node three-phase ac switch machine with a trackside control function is becoming an urgent technical problem to be solved.
Disclosure of Invention
In view of the above problems, the present invention provides a safe driving method and a safe driving module for a three-phase ac switch machine without nodes.
The invention aims to provide a safe driving method of a non-node three-phase alternating current switch machine, which comprises the following steps,
acquiring trackside 220V alternating current, and outputting 311V direct current after filtering and rectifying the trackside 220V alternating current;
the 311V direct current is output after being subjected to direct current boost conversion, and 600V direct current is provided for the input of a three-phase inverter circuit;
the first drive control module detects input information and output information of the direct current boost conversion to control the output of the direct current boost conversion;
the three-phase inverter circuit converts the 600V direct current into 380V three-phase alternating current based on the safe driving signal output by the second driving control module to supply power to the three-phase alternating current switch machine;
the acquisition detection circuit acquires and detects the voltage value and the three-phase current value output by the three-phase inverter circuit and feeds the voltage value and the three-phase current value back to the safety logic control module;
the safety logic control module detects whether the voltage value and the three-phase current value are normal or not, wherein,
if the voltage value and the three-phase current value are normal, the safety logic control module outputs a safety and IO control signal to the safety and control circuit, the safety and control circuit provides a driving voltage for the first driving control module so that the first driving control module can control the output of direct current boost conversion, and the safety logic control module outputs a pulse width modulation IO driving signal to the second driving control module so that the second driving control module controls the output of the three-phase inverter circuit by outputting the first safety driving signal and finally drives the three-phase alternating current switch machine to act;
if the voltage value and/or the three-phase current value are abnormal, the safety logic control module stops outputting safety and IO control signals and pulse width modulation IO driving signals, the safety and control circuit stops providing driving voltage for the first driving control module, the first driving control module stops working, the second driving control module stops outputting the first safety driving signals, the direct current boost conversion and three-phase inverter circuit does not output, and the three-phase alternating current switch machine does not act.
Further, the method may further comprise,
and the 220V alternating current beside the rail is converted and output by the power conversion circuit, so that a safety and IO control signal is output to the safety and control circuit through the safety logic control module, and a driving voltage is provided for the first driving control module.
Further, the input information of the dc boost conversion includes an input current of the dc boost conversion;
the output information of the dc boost conversion includes an output voltage of the dc boost conversion.
Further, the first driving control module detects input information and output information of the dc boost conversion to control the output of the dc boost conversion includes,
the first drive control module judges whether the phases of the input current and the output voltage of the direct current boost conversion are consistent or not; wherein the content of the first and second substances,
when the phase of the input current of the direct current boost conversion is consistent with that of the output voltage, the first driving control module drives the direct current boost conversion to output 600V direct current;
when the phases of the input current and the output voltage of the direct current boost conversion are not consistent, the first drive control module outputs a second safe drive signal to the direct current boost conversion based on the detection signals of the input current and the output voltage, and the direct current boost conversion adjusts the input current and the output voltage so as to keep the phases of the input current and the output voltage consistent.
Furthermore, the driving of the three-phase AC switch machine also comprises,
the acquisition detection circuit acquires and detects the current working state of the three-phase alternating current point switch and feeds the current working state back to the safety logic control module;
the safety logic control module determines whether the three-phase alternating current switch machine is in place or not according to the current working state;
if the three-phase alternating current switch machine is in place, the safety logic control module controls the direct current boost conversion and the three-phase inverter circuit to have no output, and the three-phase alternating current switch machine has no action;
if the three-phase alternating current point machine is not in place, the safety logic control module controls the direct current boost conversion and the three-phase inverter circuit to output, and the three-phase alternating current point machine is continuously driven to act.
Another object of the present invention is to provide a safe driving module of a nodeless three-phase alternating current switch machine, which comprises,
the trackside 220V alternating current power supply is used for providing trackside 220V alternating current for the rectifying and filtering circuit and the power conversion circuit;
the rectification filter circuit is used for filtering and rectifying the trackside alternating current and then outputting 311V direct current;
the direct current boost conversion circuit is used for outputting 311V direct current after direct current boost conversion and providing 600V direct current for the input of the three-phase inverter circuit module;
the first drive control module is used for detecting input information and output information of the direct current boost conversion so as to control the output of the direct current boost conversion circuit;
the second drive control module is used for outputting a first safe drive signal so as to control the output of the three-phase inverter circuit;
the three-phase inverter circuit is used for converting the 600V direct current into 380V three-phase alternating current according to the first safety driving signal and supplying power to the three-phase alternating current point switch;
the acquisition detection circuit is used for acquiring and detecting the voltage value and the three-phase current value of the three-phase inverter circuit and the current working state of the three-phase alternating current point switch and feeding the current working state back to the safety logic control module;
a safety logic control module for detecting whether the voltage value and the three-phase current value are normal or not, wherein,
if the voltage value and the three-phase current value are normal, the safety logic control module is used for outputting a safety and IO control signal to the safety and control circuit, the safety and control circuit provides a driving voltage for the first driving control module so that the first driving control module can control the output of the direct current boost conversion circuit, and the safety logic control module outputs a pulse width modulation IO driving signal to the second driving control module so that the second driving control module controls the output of the three-phase inverter circuit by outputting the first safety driving signal and finally drives the three-phase alternating current point switch to act;
if the voltage value and/or the three-phase current value are abnormal, the safety logic control module stops outputting safety and IO control signals and pulse width modulation IO driving signals, the safety and control circuit stops providing driving voltage for the first driving control module, the first driving control module stops working, the second driving control module stops outputting the first safety driving signals, the direct current boost conversion circuit and the three-phase inverter circuit do not output, and the three-phase alternating current switch machine does not act.
Further, the input information of the dc boost conversion circuit includes an input current of the dc boost conversion module;
the output information of the direct current boost conversion circuit comprises the output voltage of the direct current boost conversion module.
Further, the first driving control module is further configured to perform the following steps:
the first drive control module judges whether the phases of the input current and the output voltage of the direct current boost conversion circuit are consistent or not; wherein the content of the first and second substances,
when the phase of the input current of the direct current boost conversion circuit is consistent with that of the output voltage, the first drive control module drives the direct current boost conversion circuit to output 600V direct current;
when the phases of the input current and the output voltage of the direct current boost conversion circuit are inconsistent, the first drive control module outputs a second safe drive signal to the direct current boost conversion circuit based on the detection signals of the input current and the output voltage, and the direct current boost conversion circuit adjusts the input current and the output voltage so as to keep the phases of the input current and the output voltage consistent.
Further, the safety logic control module is further configured to perform the following steps:
the safety logic control module determines whether the three-phase alternating current switch machine is in place or not according to the current working state of the three-phase alternating current switch machine;
if the three-phase alternating current switch machine is in place, the safety logic control module controls the direct current boost conversion circuit and the three-phase inverter circuit to have no output, and the three-phase alternating current switch machine has no action;
if the three-phase alternating current point machine is not in place, the safety logic control module controls the output of the direct current boost conversion circuit and the three-phase inverter circuit to continuously drive the three-phase alternating current point machine to act.
Further, the safety driving module further comprises a power conversion circuit, wherein,
the power supply conversion circuit is used for converting and outputting the rail-side 220V alternating current through the power supply conversion circuit, so that a safety and IO control signal is output to the safety and control circuit through the safety logic control module, and a driving voltage is provided for the first driving control module.
The invention has the following beneficial effects:
1. the first drive control module is matched with the direct current boost conversion, and the three-phase inverter circuit is matched with the second drive control module, so that the direct current boost conversion and the double closed-loop control output of the voltage and the current of the three-phase inverter circuit are realized. In addition, when the acquisition detection circuit detects that signals such as voltage and current related to the direct current boost conversion and/or the three-phase inverter circuit are abnormal, the safety logic control module stops outputting safety and IO control signals and pulse width modulation IO driving signals, the first driving control module and the second driving control module stop driving, the direct current boost conversion cannot realize the boost function, the direct current boost conversion and the three-phase inverter circuit have no output, namely, the strong current circuit has no output, the three-phase alternating current switch machine cannot act, the safety of operators can be guaranteed, and the damage of power devices is reduced.
2. The DC boost conversion and the three-phase inverter circuit are adopted to realize voltage conversion, a relay and a transformer are not needed, the size is small, and the cost is low.
3. The 220V alternating current power supply beside the rail is used as strong current input, so that the single-phase 220V alternating current is converted into 380V three-phase alternating current without additionally providing 380V alternating current, and the reliability and the safety of the safety driving module are improved.
4. The high power density and miniaturization of the switch machine driving module are realized by adopting the direct current conversion and three-phase inverter circuit, the side-rail control of the three-phase alternating current switch machine which is free of nodes, low in cost, safe and reliable is realized, and the wide application prospect is realized.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram illustrating a safe driving method of a nodeless three-phase alternating current switch machine according to an embodiment of the invention;
fig. 2 shows a schematic diagram of a safe driving module of a nodeless three-phase alternating current switch machine according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a safe driving method of a node-free three-phase alternating current switch machine, which comprises the steps of firstly, obtaining 220V alternating current beside a rail, filtering and rectifying the 220V alternating current beside the rail, and then outputting 311V direct current; secondly, the 311V direct current is output after being subjected to direct current boost conversion, and 600V direct current is provided for the input of a three-phase inverter circuit; then, the first drive control module detects input information and output information of the direct current boost conversion to control output of the direct current boost conversion; then, the three-phase inverter circuit converts the 600V direct current into 380V three-phase alternating current based on the safe driving signal output by the second driving control module to supply power for the three-phase alternating current switch machine; then, the acquisition detection circuit acquires and detects the voltage value and the three-phase current value output by the three-phase inverter circuit; finally, the safety logic control module detects whether the voltage value and the three-phase current value are normal or not, wherein if the voltage value and the three-phase current value are both normal, the safety logic control module outputs a safety and IO control signal to the safety and control circuit, the safety and control circuit provides a driving voltage for the first driving control module so that the first driving control module can control the output of the direct current boost conversion, and the safety logic control module outputs a pulse width modulation IO driving signal to the second driving control module so that the second driving control module controls the output of the three-phase inverter circuit by outputting the first safety driving signal, and finally drives the three-phase alternating current switch machine to act; if the voltage value and/or the three-phase current value are abnormal, the safety logic control module stops outputting safety and IO control signals and pulse width modulation IO driving signals, the safety and control circuit stops providing driving voltage for the first driving control module, the first driving control module stops working, the second driving control module stops outputting the first safety driving signals, the direct current boost conversion and three-phase inverter circuit does not output, and the three-phase alternating current switch machine does not act.
The direct-current boost conversion and three-phase inversion circuit formed based on the power electronic devices provides electric energy for the three-phase alternating-current switch machine, a transformer and a relay are not needed, high power density and miniaturization of a safe driving module of the three-phase alternating-current switch machine are achieved, and node-free, low-cost, safe and reliable trackside control over the three-phase alternating-current switch machine is also achieved. In addition, the safety logic control module controls the first drive control module and the second drive control module to realize safe drive output, and can ensure that a strong current circuit has no output and a three-phase alternating current switch has no action when any drive control module is abnormal.
In this embodiment, the safety driving module shown in fig. 2 is taken as an exemplary description, and the safety driving method is exemplarily described.
The 220V alternating current beside the rail is used as a power supply, wherein one path of the alternating current is filtered and rectified to be used as a strong current circuit, namely, the input voltage of direct current boost conversion, and further, the input voltage is about 311V direct current output by a filter rectification circuit. Another way is through power conversion circuit conversion weak current voltage to provide the power supply to weak current circuits such as first drive control module through safe logic control module, further, power conversion circuit is including keeping apart power module and isolation DC-DC power conversion circuit, and wherein, can be with the other 220V alternating current of rail conversion into safe 24V direct current through keeping apart power module, again through keeping apart DC-DC power conversion circuit output weak current voltage such as 3.3V, 5V.
In this embodiment, the input information of the dc boost conversion includes an input current of the dc boost conversion; the output information of the dc boost conversion includes an output voltage of the dc boost conversion. The direct current boost is converted into a PFC (power factor Correction) boost circuit, the first drive control module is a PFC control drive circuit, the direct current of about 311V output by the filter rectification circuit is used as the input voltage of the PFC boost circuit, and the PFC control drive circuit can carry out double closed-loop control on the input current and the output voltage of the PFC boost circuit. The PFC control driving circuit can judge whether the phases of the input current and the output voltage of the PFC boost circuit are consistent in real time, if the phases of the input current and the output voltage of the PFC boost circuit are not consistent, the PFC control driving circuit can control and output a second safety driving signal to the PFC boost circuit through detection signals of the input current and the output voltage, the PFC boost circuit is driven to eliminate current waveform distortion and phase change caused by capacitor charging in the circuit, generation of alternating current harmonics is restrained, and the phases of the voltage and the input current output by the PFC boost circuit are consistent. If the input current of the PFC boost circuit is consistent with the phase of the output voltage, the PFC boost circuit can output a stable 600V direct-current voltage. The PFC-based booster circuit and the PFC-based control driving circuit are adopted, so that the current waveform distortion and the phase change caused by capacitor charging can be eliminated, the power factor correction is realized, the input direct-current bus voltage of the three-phase inverter circuit can be stabilized at about 600V, a transformer and a relay are not needed, and the power supply boosting function is realized. Further, if the PFC control driving circuit and/or the PFC boost circuit are/is abnormal, which results in that 600V dc voltage cannot be output, the safety logic control module stops outputting the pulse width modulation IO driving signal, the safety and control circuit stops providing driving voltage for the PFC control driving circuit, the PFC control driving circuit stops working, and the boost function cannot be realized at this time, so that the three-phase inverter circuit cannot receive the input voltage, the three-phase inverter circuit stops working, and the three-phase inverter circuit also has no output, so that the three-phase switch machine does not perform any action, thereby increasing safety and reliability of safety driving of the three-phase ac switch machine, ensuring safety of operators, and reducing damage to power devices.
In this embodiment, the acquisition and detection circuit acquires and detects the output information of the three-phase inverter circuit, and sends the output information to the safety logic control module through the optical coupling isolation circuit, and the output information of the three-phase inverter circuit includes the voltage value and the three-phase current value output by the three-phase inverter circuit.
Specifically, still taking fig. 2 as an exemplary illustration, the second driving control module is a safety control driving circuit, the three-phase inverter circuit takes the outputs of the PFC boost circuit and the safety control driving circuit as inputs, that is, the input voltage of the three-phase inverter circuit is 600V direct current output by the PFC boost circuit, and the signal for driving the three-phase inverter circuit to work is the first safety driving signal output by the safety control driving circuit. Under the driving control of the first safety driving signal, the three-phase inverter circuit converts the input 600V direct current into 380V three-phase alternating current, and the 380V three-phase alternating current is used for driving a three-phase alternating current switch machine. Further specifically, the three-phase inverter circuit realizes a soft start function by controlling the on and off of the power device, and the soft start can limit the starting current within the working current range so as to ensure that the circuit is not influenced by instant impact current, improve the reliability of the circuit and prolong the service life of the three-phase alternating current switch machine and the whole drive circuit.
Further, the safety logic control module can obtain the control state of the safety driving module shown in fig. 2 in real time by obtaining the voltage and the three-phase current output by the three-phase inverter circuit collected by the collecting and detecting circuit, when the output is abnormal, the safety control driving circuit stops driving, the three-phase alternating current point switch stops working, and the safety of operators can be ensured. Specifically, the safety logic control module performs real-time inspection on the acquired voltage value and the acquired three-phase current value, if the voltage value and the three-phase current value are in accordance with each other, the safety logic control module outputs a pulse width modulation io (input output) driving signal through the optical coupling isolation circuit as a driving signal required by the safety control driving circuit, and after receiving the driving signal, the safety control driving circuit outputs a first safety driving signal to the three-phase inverter circuit for controlling the on and off of a power device in the three-phase inverter circuit, so as to realize the safety output of 380V alternating current. And if and only if the safety logic control module works normally and the safety and control circuit outputs normally, the safety control driving circuit can work normally, otherwise, the whole safety driving module has no output and the three-phase point switch has no action.
If the voltage value and the three-phase current value are not consistent, the voltage value and/or the three-phase current value are/is abnormal, the three-phase inverter circuit is abnormal, the safety logic control module stops outputting a safety and IO control signal and a pulse width modulation IO driving signal, at the moment, the safety and control circuit and the safety control driving circuit stop working, the safety and control circuit does not provide electric energy for the PFC control driving circuit, the PFC booster circuit also stops working, the three-phase inverter circuit does not have input voltage and a safety driving signal, and therefore the three-phase inverter circuit also stops working, namely the whole safety driving module does not output, and the three-phase alternating current switcher does not act. Further, any one of the voltage value and the three-phase current value is abnormal, and it is determined that there is an abnormality in the safety driving module, and the abnormality of the voltage value and the three-phase current value includes, for example, that the voltage exceeds an allowable maximum value, or the voltage is lower than an allowable minimum value, that the current exceeds an allowable maximum value, or the current is lower than an allowable minimum value, and the like.
In this embodiment, the safety logic control module further acquires the current working state of the three-phase alternating current point switch in real time through the acquisition detection circuit. The acquisition detection circuit acquires dynamic signals output by the three-phase alternating current point switch in real time by dynamic acquisition so as to judge the in-place state of the three-phase alternating current point switch, wherein the current working state of the three-phase alternating current point switch comprises a positioning state, a reverse state or a tearing state.
The safety logic control module determines whether the three-phase alternating current switch machine is in place or not according to the current working state of the three-phase alternating current switch machine; if the three-phase alternating current switch machine is in place, the safety logic control module controls the PFC booster circuit and the three-phase inverter circuit to have no output, and the three-phase alternating current switch machine has no action; namely, the safety logic control module stops outputting the safety and IO control signal and the pulse width modulation IO driving signal, the safety and control circuit stops providing the driving voltage for the PFC control driving circuit, the PFC control driving circuit stops working, the safety control driving circuit stops outputting the first safety driving signal, the direct current boost conversion and three-phase inverter circuit does not output, and the three-phase alternating current switch machine does not act. If the three-phase alternating current point machine is not located, the safety logic control module controls the output of the PFC booster circuit and the three-phase inverter circuit and continues to drive the three-phase alternating current point machine to act; the safety logic control module outputs a safety and IO control signal to the safety and control circuit, the safety and control circuit provides a driving voltage for the PFC control driving circuit to enable the PFC control driving circuit to control the output of direct current boost conversion, and the safety logic control module outputs a pulse width modulation IO driving signal to the safety control driving circuit to enable the safety control driving circuit to control the output of the three-phase inverter circuit by outputting a first safety driving signal, and finally drives the three-phase alternating current switch machine to act.
The safety logic control module adopts double microprocessors to generate a safety and IO control signal and a pulse width modulation IO driving signal, and respectively outputs the signals to the control safety and control circuit and the safety control driving circuit so as to realize the control of the whole safety driving module, and can ensure that when any one of the PFC booster circuit, the three-phase inverter circuit and the three-phase AC switch machine works abnormally, a strong current circuit, namely the PFC booster circuit and the three-phase inverter circuit, has no output, and the three-phase AC switch machine has no action so as to ensure the reliability and the safety of the three-phase AC switch machine module.
As shown in fig. 2, a safe driving module of a nodeless three-phase ac switch machine, which can apply the safe driving method, is also introduced in the embodiment of the present invention, and includes a power supply, a rectifying and filtering circuit, a power conversion circuit, a PFC boost circuit, a PFC control driving circuit, a safety and control circuit, a safety control driving circuit, a three-phase inverter circuit, an acquisition and detection circuit, and a safety logic control module, where the power supply adopts a 220V ac power supply at the side of a rail, and is configured to provide 220V ac power at the side of the rail for the rectifying and filtering circuit and the power conversion circuit; the rectification filter circuit is used for filtering and rectifying the trackside alternating current and then outputting 311V direct current; the PFC boost circuit is used for outputting 311V direct current after direct current boost conversion, and providing 600V direct current for the input of the three-phase inverter circuit; the PFC control driving circuit is used for detecting input information and output information of the PFC boost circuit so as to control the output of the PFC boost circuit; the safety control driving circuit is used for outputting a first safety driving signal so as to control the output of the three-phase inverter circuit module; the three-phase inverter circuit is used for converting the 600V direct current into 380V three-phase alternating current according to the first safety driving signal and supplying power to the three-phase alternating current switch machine; the acquisition detection circuit is used for acquiring and detecting the voltage value and the three-phase current value of the three-phase inverter circuit and the current working state of the three-phase alternating current point switch and feeding the current working state back to the safety logic control module; and the safety logic control module is used for outputting a safety and IO control signal to the safety and control circuit if the voltage value and the three-phase current value are normal, the safety and control circuit provides a driving voltage for the PFC control driving circuit so that the PFC control driving circuit can control the output of the PFC booster circuit, and the safety logic control module outputs a pulse width modulation IO driving signal to the safety control driving circuit so that the safety control driving circuit controls the output of the three-phase inverter circuit by outputting a first safety driving signal and finally drives the three-phase alternating current switch machine to act. If the voltage value and/or the three-phase current value are abnormal, the safety logic control module stops outputting the safety and IO control signal and the pulse width modulation IO driving signal, the safety and control circuit stops providing driving voltage for the PFC control driving circuit, the PFC control driving circuit stops working, the safety control driving circuit stops outputting the first safety driving signal, the PFC booster circuit and the three-phase inverter circuit do not output, and the three-phase alternating current switch machine does not act.
In this embodiment, the safety logic control module includes two microprocessors, the safety logic control module is connected to the PFC control driving circuit through the safety and control circuit, and an optical coupling isolation circuit is disposed between the safety logic control module and the safety and control circuit. Similarly, optical coupling isolation circuits are arranged between the safety logic control module and the acquisition detection circuit and between the safety logic control module and the safety control driving circuit. Furthermore, each microprocessor in the safety logic control module independently forms closed-loop control, control information sent by a remote control center on a redundant communication line is obtained in real time, whether the received control information is consistent or not is judged through synchronous communication check of the double microprocessors, the working state of the three-phase alternating current switch machine is judged, and when the synchronous communication check of the double microprocessors passes, a positioning or reverse driving control command of the three-phase alternating current switch machine is continuously executed.
In this embodiment, the power conversion circuit is configured to convert a rail-side 220V alternating current into a weak current voltage, so as to supply power to a weak current circuit such as a PFC control driving circuit through the safety logic control module, and further, the power conversion circuit includes an isolation power module and an isolation DC-DC power conversion circuit, where the rail-side 220V alternating current can be converted into a safe 24V direct current through the isolation power module, and the isolated DC-DC power conversion circuit outputs the weak current voltage such as 3.3V and 5V.
The PFC control driving circuit detects the input current and the output voltage of the PFC boost circuit in real time, judges whether the phases of the input current and the output voltage of the PFC boost circuit are consistent or not, and controls and outputs a second safety driving signal to the PFC boost circuit through detection signals of the input current and the output voltage if the phases of the input current and the output voltage of the PFC boost circuit are inconsistent, so that the PFC boost circuit eliminates current waveform distortion and phase change caused by capacitor charging in a circuit of the PFC boost circuit, inhibits generation of alternating current harmonics, and enables the phases of the output voltage and the input current in the PFC boost circuit to be consistent. And if the phase of the input current of the PFC booster circuit is consistent with that of the output voltage, the PFC control driving circuit outputs and drives the PFC booster circuit to output a stable 600V direct-current voltage. Preferably, the PFC control driving circuit outputs a third safety driving signal to drive the PFC boost circuit to output a 600V dc voltage.
The acquisition detection circuit acquires and detects a voltage value and a three-phase current value output by the three-phase inverter circuit, the voltage value and the three-phase current value are transmitted to the safety logic control module through the optical coupling isolation circuit, the acquired voltage value and the three-phase current value are detected in real time, if the voltage value and the three-phase current value are detected to be consistent, the safety logic control module outputs a pulse width modulation (IO) drive signal through the optical coupling isolation circuit to serve as a drive signal required by the safety control drive circuit, the safety control drive circuit outputs a first safety drive signal according to the required drive signal to control the on and off of a power device in the three-phase inverter circuit, and the safety output of 380V alternating current is realized. Similarly, the safety logic control module outputs a safety and IO driving signal through the optical coupling isolation circuit to drive the safety and control circuit to supply power for the PFC control driving circuit.
If the voltage value and the three-phase current value are not consistent, the voltage value and/or the three-phase current value are abnormal, the driving states of the safety and control circuit and the safety control driving circuit are abnormal, the safety logic control module stops outputting safety and IO control signals and pulse width modulation IO driving signals, the safety and control circuit and the safety control driving circuit stop working, the PFC control driving circuit cannot obtain electric energy and stops working, the PFC booster circuit and the three-phase inverter circuit do not output, namely the whole safety driving module does not output, and the three-phase alternating current switch machine does not act.
The PFC control driving circuit is matched with the PFC boosting circuit, and the three-phase inverter circuit is matched with the safety control driving circuit, so that double closed-loop control output of voltage and current of the PFC control driving circuit and the three-phase inverter circuit is realized. In addition, when the detection/acquisition circuit detects that the signals such as the output voltage and the output current of the driving module are abnormal, the safety logic operation circuit stops outputting the safety and IO control signal and the pulse width modulation IO drive signal, the PFC control drive circuit and the safety control drive circuit stop driving, the PFC booster circuit cannot realize the boosting function at the moment, the PFC booster circuit and the three-phase inverter circuit do not output, namely, the strong current circuit does not output, the three-phase alternating current switch machine cannot act, the safety of operators can be guaranteed, and the damage of power devices is reduced.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A safe driving method of a nodeless three-phase alternating current switch machine is characterized by comprising the following steps,
acquiring trackside 220V alternating current, and outputting 311V direct current after filtering and rectifying the trackside 220V alternating current;
the 311V direct current is output after being subjected to direct current boost conversion, and 600V direct current is provided for the input of a three-phase inverter circuit;
the first drive control module detects input information and output information of the direct current boost conversion to control the output of the direct current boost conversion;
the three-phase inverter circuit converts the 600V direct current into 380V three-phase alternating current based on the safe driving signal output by the second driving control module to supply power to the three-phase alternating current switch machine;
the acquisition detection circuit acquires and detects the voltage value and the three-phase current value output by the three-phase inverter circuit and feeds the voltage value and the three-phase current value back to the safety logic control module;
the safety logic control module detects whether the voltage value and the three-phase current value are normal or not, wherein,
if the voltage value and the three-phase current value are normal, the safety logic control module outputs a safety and IO control signal to the safety and control circuit, the safety and control circuit provides a driving voltage for the first driving control module so that the first driving control module can control the output of direct current boost conversion, and the safety logic control module outputs a pulse width modulation IO driving signal to the second driving control module so that the second driving control module controls the output of the three-phase inverter circuit by outputting the first safety driving signal and finally drives the three-phase alternating current switch machine to act;
if the voltage value and/or the three-phase current value are abnormal, the safety logic control module stops outputting safety and IO control signals and pulse width modulation IO driving signals, the safety and control circuit stops providing driving voltage for the first driving control module, the first driving control module stops working, the second driving control module stops outputting the first safety driving signals, the direct current boost conversion and three-phase inverter circuit does not output, and the three-phase alternating current switch machine does not act.
2. The safe driving method of the nodeless three-phase alternating current switch machine according to claim 1, further comprising,
and the 220V alternating current beside the rail is converted and output by the power conversion circuit, so that a safety and IO control signal is output to the safety and control circuit through the safety logic control module, and a driving voltage is provided for the first driving control module.
3. The safe driving method of the nodeless three-phase alternating current switch machine according to claim 1, wherein the input information of the direct current boost conversion includes an input current of the direct current boost conversion;
the output information of the dc boost conversion includes an output voltage of the dc boost conversion.
4. The safe driving method of a nodeless three-phase alternating current switch machine according to claim 3, wherein the first driving control module detects input information and output information of the direct current boost conversion to control the output of the direct current boost conversion includes,
the first drive control module judges whether the phases of the input current and the output voltage of the direct current boost conversion are consistent or not; wherein the content of the first and second substances,
when the phase of the input current of the direct current boost conversion is consistent with that of the output voltage, the first driving control module drives the direct current boost conversion to output 600V direct current;
when the phases of the input current and the output voltage of the direct current boost conversion are not consistent, the first drive control module outputs a second safe drive signal to the direct current boost conversion based on the detection signals of the input current and the output voltage, and the direct current boost conversion adjusts the input current and the output voltage so as to keep the phases of the input current and the output voltage consistent.
5. The safe driving method of a nodeless three-phase AC switch machine according to claim 1, further comprising driving the three-phase AC switch machine after the action,
the acquisition detection circuit acquires and detects the current working state of the three-phase alternating current point switch and feeds the current working state back to the safety logic control module;
the safety logic control module determines whether the three-phase alternating current switch machine is in place or not according to the current working state;
if the three-phase alternating current switch machine is in place, the safety logic control module controls the direct current boost conversion and the three-phase inverter circuit to have no output, and the three-phase alternating current switch machine has no action;
if the three-phase alternating current point machine is not in place, the safety logic control module controls the direct current boost conversion and the three-phase inverter circuit to output, and the three-phase alternating current point machine is continuously driven to act.
6. A safe driving module of a non-node three-phase alternating current switch machine is characterized by comprising a safe driving module,
the trackside 220V alternating current power supply is used for providing trackside 220V alternating current for the rectifying and filtering circuit and the power conversion circuit;
the rectification filter circuit is used for filtering and rectifying the trackside alternating current and then outputting 311V direct current;
the direct current boost conversion circuit is used for outputting 311V direct current after direct current boost conversion and providing 600V direct current for the input of the three-phase inverter circuit module;
the first drive control module is used for detecting input information and output information of the direct current boost conversion so as to control the output of the direct current boost conversion circuit;
the second drive control module is used for outputting a first safe drive signal so as to control the output of the three-phase inverter circuit;
the three-phase inverter circuit is used for converting the 600V direct current into 380V three-phase alternating current according to the first safety driving signal and supplying power to the three-phase alternating current point switch;
the acquisition detection circuit is used for acquiring and detecting the voltage value and the three-phase current value of the three-phase inverter circuit and the current working state of the three-phase alternating current point switch and feeding the current working state back to the safety logic control module;
a safety logic control module for detecting whether the voltage value and the three-phase current value are normal or not, wherein,
if the voltage value and the three-phase current value are normal, the safety logic control module is used for outputting a safety and IO control signal to the safety and control circuit, the safety and control circuit provides a driving voltage for the first driving control module so that the first driving control module can control the output of the direct current boost conversion circuit, and the safety logic control module outputs a pulse width modulation IO driving signal to the second driving control module so that the second driving control module controls the output of the three-phase inverter circuit by outputting the first safety driving signal and finally drives the three-phase alternating current point switch to act;
if the voltage value and/or the three-phase current value are abnormal, the safety logic control module stops outputting safety and IO control signals and pulse width modulation IO driving signals, the safety and control circuit stops providing driving voltage for the first driving control module, the first driving control module stops working, the second driving control module stops outputting the first safety driving signals, the direct current boost conversion circuit and the three-phase inverter circuit do not output, and the three-phase alternating current switch machine does not act.
7. The safe driving module of the nodeless three-phase alternating current switch machine according to claim 6, wherein the input information of the direct current boost conversion circuit includes an input current of the direct current boost conversion module;
the output information of the direct current boost conversion circuit comprises the output voltage of the direct current boost conversion module.
8. The safe driving module of the nodeless three-phase alternating current switch machine according to claim 7, wherein the first driving control module is further configured to perform the steps of:
the first drive control module judges whether the phases of the input current and the output voltage of the direct current boost conversion circuit are consistent or not; wherein the content of the first and second substances,
when the phase of the input current of the direct current boost conversion circuit is consistent with that of the output voltage, the first drive control module drives the direct current boost conversion circuit to output 600V direct current;
when the phases of the input current and the output voltage of the direct current boost conversion circuit are inconsistent, the first drive control module outputs a second safe drive signal to the direct current boost conversion circuit based on the detection signals of the input current and the output voltage, and the direct current boost conversion circuit adjusts the input current and the output voltage so as to keep the phases of the input current and the output voltage consistent.
9. The safe driving module of the nodeless three-phase alternating current switch machine according to claim 6, wherein the safe logic control module is further configured to perform the following steps:
the safety logic control module determines whether the three-phase alternating current switch machine is in place or not according to the current working state of the three-phase alternating current switch machine;
if the three-phase alternating current switch machine is in place, the safety logic control module controls the direct current boost conversion circuit and the three-phase inverter circuit to have no output, and the three-phase alternating current switch machine has no action;
if the three-phase alternating current point machine is not in place, the safety logic control module controls the output of the direct current boost conversion circuit and the three-phase inverter circuit to continuously drive the three-phase alternating current point machine to act.
10. The nodeless three-phase AC switch machine safety drive module of claim 6, further comprising a power conversion circuit, wherein,
the power supply conversion circuit is used for converting and outputting the rail-side 220V alternating current through the power supply conversion circuit, so that a safety and IO control signal is output to the safety and control circuit through the safety logic control module, and a driving voltage is provided for the first driving control module.
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