CN101951217A - Diesel locomotive auxiliary engine control device - Google Patents
Diesel locomotive auxiliary engine control device Download PDFInfo
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- CN101951217A CN101951217A CN 201010252267 CN201010252267A CN101951217A CN 101951217 A CN101951217 A CN 101951217A CN 201010252267 CN201010252267 CN 201010252267 CN 201010252267 A CN201010252267 A CN 201010252267A CN 101951217 A CN101951217 A CN 101951217A
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Abstract
The invention discloses a diesel locomotive auxiliary engine control device, which comprises a CPU, a power circuit, a crystal oscillator circuit, a differential filter circuit, a communication circuit, an overvoltage protection circuit and a drive circuit, wherein the power circuit provides power for the auxiliary engine control device; the crystal oscillator circuit is connected with the CPU and provides clock pulses for the CPU; the communication circuit is connected with the CPU, performs network communication with a control and display device on the locomotive through a serial port, and downloads a control program; the auxiliary engine outputs voltage feedback, the input DC voltage is converted into small-signal DC voltage through the differential filter circuit, and the feedback voltage is transmitted to an inner analog-digital converter of the CPU; the overvoltage protection circuit is connected with the CPU, and the auxiliary engine is made to output stable voltage by adjusting exciting current; and the drive circuit is connected with the CPU and drives the exciting current. The invention solves the technical problems of larger volume, installation space occupancy, larger deviation of parameters of analog devices, and susceptibility to multiple kinds of interference in the prior art.
Description
Technical field
The present invention relates to a kind of digital computer control device, especially relate to a kind of device that is applied to the control of diesel locomotive DC auxiliary generator output voltage.
Background technology
The output voltage of the DC auxiliary generator on the diesel locomotive adopts the control method of analog circuit always for a long time, and the circuit that promptly adopts separation devices such as operational amplifier, resistance, electric capacity to constitute is finished the control of auxiliary generator output voltage.This analog control method has a lot of defectives: analogue devices such as resistance, electric capacity, operational amplifier can be along with the increase of variation of temperature, time, and its parameter can produce drift, thereby reduces the performance of controller.And existing analog control circuit has adopted, and the relay equal-volume is big, the device of life-span than weak point causes the volume of product bigger, and maintenance workload is big.Along with the development of railway locomotive control technology, the railway locomotive product develops towards miniaturization, intensification, intelligentized direction.Therefore the user has also proposed more strict requirement to performance, volume and the price of product.And the very difficult upgrading of existing analog control circuit, in case the user proposes new demand, often be accompanied by the replacing of hardware significantly, cause cost to increase sharply like this, competitiveness of product descends a lot.
There is following shortcoming in existing analog control mode:
Volume is bigger, has taken installing space valuable on the more diesel locomotive.Because it is the parameter that relies on analogue devices such as resistance, electric capacity that simulation control adopts PID (proportion integration differentiation) to regulate, because resistance, especially the capacitance parameter deviation is bigger for electric capacity, cause the production consistency not so good, be subject to simultaneously that the components and parts temperature is floated, worn out, the influence of electromagnetic interference, thereby reduced the performance of controller.The simulation controlling Design cycle is long, debugs the comparison difficulty.The product up-gradation difficulty after the user proposes new demand, generally all is accompanied by the replacing of hardware significantly, causes product cost to increase like this, the upgrading difficulty.Be difficult to realize advanced control algolithm and various protection (as accumulator protecting).There is not soft start function; some important sensitive loads to the user are impacted bigger; analog control method is not done battery temp and is detected, and can't detect real-time regulated auxiliary generator motor excitation electric current to protect storage battery by battery temp, prolongs the life-span of storage battery.
Summary of the invention
The invention provides a kind of diesel locomotive subsidiary engine control device, the subsidiary engine control device volume that this invention can solve the prior art existence well is bigger, taken installing space valuable on the more diesel locomotive, analogue device such as resistance, electric capacity parameter error is bigger, cause the production consistency not so good, be subject to simultaneously that the components and parts temperature is floated, worn out, the influence of electromagnetic interference, thereby reduced the technical problem of the performance of controller.
The invention provides a kind of embodiment of diesel locomotive subsidiary engine control device, a kind of diesel locomotive subsidiary engine control device, comprise CPU, power circuit, crystal oscillating circuit, differential filtering circuit, communicating circuit, overvoltage crowbar and drive circuit, power circuit provides power supply for the subsidiary engine control device; Crystal oscillating circuit links to each other with CPU, for CPU provides clock pulse; Communicating circuit links to each other with CPU, and the subsidiary engine control device carries out network communication by control on serial ports and the locomotive and display unit, simultaneously by the serial ports download control program; Auxiliary generator output voltage feedback becomes the direct voltage of small-signal by the differential filtering circuit with the dc voltage conversion of input, then feedback voltage is given the internal mode number converter of CPU; Overvoltage crowbar links to each other with CPU, makes the stable voltage of auxiliary generator output by the exciting current of regulating auxiliary generator; Drive circuit links to each other with CPU, drives the exciting current of auxiliary generator.
As the further execution mode of the present invention; described diesel locomotive subsidiary engine control device comprises the battery environment temperature sensing circuit; accumulator plant detects the ambient temperature of storage battery by mounting temperature sensor; carry out communication by I2C bus and CPU; exciting current if temperature is too high to auxiliary generator limits, and realizes the protection of storage battery.
As the further execution mode of the present invention, storage battery provides 110V direct voltage for described power circuit, be transformed to direct current 5V by a Switching Power Supply P1 by DC/DC, P3 becomes direct current 12V to direct current 5V through the DC/DC Switching Power Supply, drive circuit is given in power supply, Switching Power Supply P2 is transformed into direct current ± 15V to direct current 5V and powers to the operational amplifier on the subsidiary engine control device circuit board, the ground of direct current 5V and the ground of direct current ± 15V link together by two magnetic beads, realize that by switching power source chip P4 direct current 5V isolation becomes direct current 5V, provides the insulating power supply of communicating circuit.
As the further execution mode of the present invention, when the auxiliary generator output voltage signal changes in the 20V-137.5V scope, carry out signals collecting by the differential filtering circuit, 20V-137.5V carrying out the high-barrier deviation behind the differential filtering circuit, the differential DC voltages input signal divides filtering, amplify by amplifying circuit, enter low-pass filter circuit, filtering high order frequency harmonics, export voltage follower to, finally export galvanic current and press.
As the further execution mode of the present invention, when the auxiliary generator output voltage is in the 0-123V scope, the subsidiary engine control device is operated in normal pwm pulse width modulation mode, carrying out photoelectricity by optical coupling isolation circuit isolates, and carry out signal condition through signal conditioning circuit, enter the metal-oxide-semiconductor drive circuit then, drive the size of auxiliary generator exciting current in the PWM mode; When auxiliary generator output voltage during greater than 123V, auxiliary generator overvoltage feedback drive signal is by light-coupled isolation and carry out signal condition, enters the metal-oxide-semiconductor drive circuit then, excises the auxiliary generator exciting current in the mode of turn-offing metal-oxide-semiconductor.
As the further execution mode of the present invention, described diesel locomotive subsidiary engine control device comprises one road current signal input circuit, when the 0-20mA of transducer current signal is imported, handle by the A/D converter input port that sample resistance and signal conditioning circuit make the voltage signal that produces in the 0-5V scope give CPU.
As the further execution mode of the present invention, described diesel locomotive subsidiary engine control device comprises No. one shunt detectable voltage signals input circuit, input signal from shunt, wave shaping circuit after filtration, and carry out acquisition process by electric energy computation chip, give CPU by the I2C bus communication again.
As the further execution mode of the present invention; described overvoltage crowbar comprises the software overvoltage protective module; when CPU detects the auxiliary generator output voltage greater than direct current 125V; CPU produces external interrupt; external interrupt is blocked the pwm signal of CPU output; in the auxiliary generator output voltage is reduced to direct current 0-125V scope; CPU begins the value of feedback by detected auxiliary generator output voltage immediately, the size of passing ratio integral differential dynamic adjustments auxiliary generator output voltage until output voltage stabilization in direct current 110V ± 2V normal range (NR).
As the further execution mode of the present invention, described overvoltage crowbar comprises the hardware over-voltage protection module, auxiliary generator output voltage feedback is by sending into voltage comparator circuit behind the signal conditioning circuit filter shape, when the auxiliary generator output voltage feeds back the protection value of setting greater than the user, high level of voltage comparator circuit output, this high level is divided into two paths of signals: the one tunnel gives CPU behind the wave shaping circuit after filtration, CPU produces an external interrupt, output of restriction exciting current or the output of shutoff excitation, after in auxiliary generator is got back to normal scope, CPU begins the size of dynamic adjustments auxiliary generator output voltage; Another road signal is given outside 110V direct current overvoltage indicator light through behind the isolating amplifier circuit.
As the further execution mode of the present invention, described diesel locomotive subsidiary engine control device comprises state indicating device, and state indicating device comprises that indicator of the power supply status, running state of programs indicator light, program download state indicator light, fault show indicator light and alarm condition indicator light.
By using the described a kind of diesel locomotive subsidiary engine control device of embodiment of the present invention, can increase substantially performances such as reliability of products, flexibility.Primary Component of the present invention does not all have life-span responsive type device, has reduced the workload of product maintenance like this, has prolonged the useful life of product.After device was pasted on a large amount of employings surface on the circuit board, the volume of product was compared original subsidiary engine control device and is significantly reduced, and saves installing space.Pulse-width modulation (PWM) control method that the present invention adopts can realize soft start function easily, can avoid like this user's important sensitive loads is brought impact, for the user has increased benefit.Increased the surface temperature of gathering storage battery with respect to traditional subsidiary engine control device; the accumulator cell charging and discharging electric current is monitored in real time; the subsidiary engine soft start function; can realize the charge in batteries Current Control by software algorithm like this; the detection of discharging current and warning; the protection of realization battery temp, the useful life of improving storage battery is for the user has been with objective economic benefit.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the system architecture diagram of a kind of diesel locomotive subsidiary engine of the present invention control device;
Fig. 2 is the PID control system theory diagram of a kind of diesel locomotive subsidiary engine of the present invention control device;
Fig. 3 is the circuit construction of electric power block diagram of a kind of diesel locomotive subsidiary engine of the present invention control device;
Fig. 4 is the differential filtering schematic block circuit diagram of a kind of diesel locomotive subsidiary engine of the present invention control device;
Fig. 5 is the communicating circuit theory diagram of a kind of diesel locomotive subsidiary engine of the present invention control device;
Fig. 6 is the overvoltage crowbar theory diagram of a kind of diesel locomotive subsidiary engine of the present invention control device;
Fig. 7 drives the buffer circuit theory diagram for the optocoupler of a kind of diesel locomotive subsidiary engine of the present invention control device;
Fig. 8 is the temperature sensing circuit theory diagram of a kind of diesel locomotive subsidiary engine of the present invention control device;
Fig. 9 is one road standby current signal deteching circuit theory diagram of a kind of diesel locomotive subsidiary engine of the present invention control device;
Figure 10 is the current signal detection circuit theory diagram of a kind of diesel locomotive subsidiary engine of the present invention control device;
Wherein: 1-CPU, 2-power circuit, 3-crystal oscillating circuit, 4-differential filtering circuit, 5-communicating circuit, 6-overvoltage crowbar, 7-drive circuit.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Embodiment as a kind of diesel locomotive subsidiary engine of the present invention control device, as shown in Figure 1, a kind of diesel locomotive subsidiary engine control device, comprise CPU 1, power circuit 2, crystal oscillating circuit 3, differential filtering circuit 4, communicating circuit 5, overvoltage crowbar 6 and drive circuit 7, power circuit 2 provides power supply for the subsidiary engine control device; Crystal oscillating circuit 3 links to each other with CPU 1, for CPU 1 provides clock pulse; Communicating circuit 5 links to each other with CPU, and the subsidiary engine control device carries out network communication by control on serial ports and the locomotive and display unit, simultaneously the serial ports download control program; Auxiliary generator output voltage feedback becomes the direct voltage of small-signal by differential filtering circuit 4 with the dc voltage conversion of input, then feedback voltage is given the internal mode number converter of CPU; Overvoltage crowbar 6 links to each other with CPU, makes the stable voltage of auxiliary generator output by the exciting current of regulating auxiliary generator; Drive circuit 7 links to each other with CPU, drives the exciting current of auxiliary generator.
It is the circuit of control core that the CPU of hardware circuit of the present invention adopts with the ATEMEGA128 singlechip microprocessor, single-chip microcomputer is by detecting auxiliary voltage generator and charge in batteries electric current and battery temp by pid control mode driven MOS pipe, size by PWM pulse-width regulated auxiliary generator exciting current, thereby control auxiliary generator output voltage stabilization is in desired value, to realize the constant voltage control to auxiliary voltage generator.Simultaneously the charge in batteries electric current is carried out overcurrent protection and battery temp protection.Whole system hardware circuit principle block diagram is seen accompanying drawing 1, and PID control block diagram is seen accompanying drawing 2.
Power circuit mainly is to provide power supply to subsidiary engine control device each several part circuit.Power supply provides direct current 110V voltage by storage battery, is transformed to direct current 5V (representative value) by a Switching Power Supply P1 by DC/DC, and input and output ground isolates.This power supply uses for whole device analog circuit and part digital circuit.P3 becomes direct current 12V (representative value) to direct current 5V through the DC/DC Switching Power Supply, and optical couple isolation drive circuit is given in power supply.Switching Power Supply P2 is transformed into direct current ± 15V to direct current 5V and powers to operational amplifier on the circuit board, and the ground of direct current 5V and the ground of direct current ± 15V link together by two magnetic beads.Realize that by switching power source chip P4 direct current 5V isolation becomes direct current 5V, provides the serial communication insulating power supply.Crystal oscillating circuit adopts outside 16M crystal oscillator.The power circuit block diagram as shown in Figure 3.
The differential filtering signal acquisition circuit: auxiliary generator auxiliary generator output voltage feedback becomes the dc voltage conversion of input by the differential filtering circuit direct voltage of small-signal, then feedback voltage is given the internal mode number converter of ATEMEGA128, when voltage signal changes in the 20V-137.5V scope, the differential filtering circuit that constitutes by amplifier carries out signals collecting, and capacitance-resistance low-pass filtering and voltage follower that single-ended output is formed through amplifier are sent into post processing electric circuit.Difference between two input end signals of this circuit is the effective input signal of circuit, and the output of circuit is the amplification to the difference of these two input signals.If there is identical interference in two input signals, poor by the two, interference signal effectively be input as zero, this has just reached the purpose of anti-common mode disturbances.Differential signal enters low-pass filter circuit behind the differential filtering circuit, filtering high order frequency harmonics makes the output result stable.
The subsidiary engine control device carries out network communication by other controls on RS422/485 serial ports and the locomotive, display unit, and control program also can be downloaded by the RS422/485 serial ports simultaneously, and the communicating circuit schematic diagram is seen accompanying drawing 5.The design's purpose is making the output voltage stabilization of auxiliary generator at direct current 110V ± 2V by the exciting current of regulating auxiliary generator; but, be 0 to realize the overvoltage protection of auxiliary generator output voltage until exciting current by reducing exciting current when auxiliary generator output voltage during greater than 125V.
Software overvoltage protection: when single-chip microcomputer detects the auxiliary generator output voltage greater than direct current 125V; single-chip microcomputer can produce an external interrupt immediately; external interrupt can be blocked the pwm signal of single-chip microcomputer output immediately; the duty ratio blockade that is pwm signal is 0, plays the effect of software overvoltage protection.After the auxiliary generator output voltage is reduced in the scope of direct current (0-125V), single-chip microcomputer begins the value of feedback by detected auxiliary generator output voltage immediately, the size by PID (proportion integration differentiation) dynamic adjustments output voltage until output voltage stabilization in direct current 110V ± 2V normal range (NR).
Hardware over-voltage protection: as shown in Figure 6; the auxiliary voltage generator feedback is by sending into voltage comparator circuit behind the signal conditioning circuit filter shape; when auxiliary voltage generator feeds back the protection value of setting greater than the user, high level of voltage comparator circuit output, this high level is divided into two paths of signals:
One the tunnel gives CPU behind the wave shaping circuit after filtration, and CPU can produce external interrupt restriction exciting current output or locking pulse immediately immediately, turn-offs excitation output.After in auxiliary power generation electromechanics is got back to normal scope, CPU begins dynamic adjustments auxiliary voltage generator size.
Another road signal is given outside 110V direct current overvoltage indicator light through behind the isolating amplifier circuit, and the user can recognize the working condition of subsidiary engine control device very intuitively like this.
When auxiliary voltage generator is in the 0-123V scope, the subsidiary engine control device is operated in normal pwm pulse width modulation mode, by light-coupled isolation and carry out signal condition, enter the metal-oxide-semiconductor drive circuit then, drive auxiliary generator exciting current size in the PWM mode.When auxiliary voltage generator during greater than 123V, auxiliary generator overvoltage feedback drive signal is by light-coupled isolation and carry out signal condition, enters the metal-oxide-semiconductor drive circuit then, excises the auxiliary generator exciting current in the mode of turn-offing metal-oxide-semiconductor.
On panel, make 8 indicator lights, be used to refer to various status signals respectively.Power supply status, running state of programs, program download state, fault show and alarm condition.Can define the state of indicator light by software programming flexibly, the very first time is understood the working condition of device and fault location information etc. fast at the scene to make things convenient for user and technical support personnel.
Accumulator plant detects the ambient temperature of storage battery by mounting temperature sensor TMP175, carries out communication by I2C and single-chip microcomputer, limits the auxiliary generator exciting current if temperature is too high, realizes the protection of storage battery.
1 road current signal input circuit.When transducer 0-20mA current signal is imported, make the voltage signal that produces in the 0-5V scope give Chip Microcomputer A/D input port by sample resistance and signal conditioning circuit and handle.
No. 1 shunt detectable voltage signals (direct current 0-75mV) input circuit.0-75mV level input is carried out acquisition process by electric energy computation chip ADE7753 on the shunt, gives Chip Microcomputer A tmega128 by the I2C communication again.
It is the digital control technology of core that the present invention adopts with single chip computer AT EMEGA128, and the employing software control algorithm is realized the accurate control to auxiliary generator motor output voltage.Devices are pasted on a large amount of surfaces of adopting, and have reduced the volume of product, improve product reliability simultaneously, for the user has saved installing space on the valuable locomotive.Realized the closed-loop control to auxiliary voltage generator, control mode is flexible, and control rate is fast.Can be easy to realize the overvoltage protection of auxiliary voltage generator, the monitoring of storage battery charge and discharge electric current, the monitoring of accumulator meter surface temperature etc.Can tackle the different new demand that the user proposes, flexibility height by the mode of software upgrading.Can download by serial ports by the connector on the panel, upgrade or operation such as replacing program.Simultaneously also can easily carry out operations such as field failure inline diagnosis, debugging by serial ports and dataphone.Reserved the input of 2 road voltages, the input of 1 road electric current, 1 tunnel temperature input interface simultaneously, the flexible expansion when user proposed new demand after this design can make things convenient for, this expansion does not need to change any hardware circuit and only needs upgrade software to get final product.The RS422/485 serial communication circuit as shown in Figure 5, can easily be downloaded and program on-line fault diagnosis function by serial ports of computers communication realization program, does not need relieving attachment just can finish on-line fault diagnosis and program download and upgrade function.Solved the defective of analog circuit accent parameter difficulty.Adopt the hardware circuit of 8 ATMEGA128 single-chip microcomputers for the control core, by the closed-loop control of software algorithm realization to auxiliary voltage generator, control mode is flexible, and control rate is fast.The simulation controlling Design cycle is long, debugs the comparison difficulty.The product up-gradation difficulty after the user proposes new demand, generally all is accompanied by the replacing of hardware significantly, causes product cost to increase like this, the upgrading difficulty.
This device adopts digital control method, only needs to change the upgrading that software just can be realized product.In case the user has proposed new demand, the interface circuit that this device is reserved can provide abundant expansion to the user, and these expansions only need to change software and get final product, and do not need to change any hardware circuit.So, all brought great benefit for user and product vendor because the Primary Component of this device does not all adopt the maintenance workload of relay equivalent life Sensitive Apparatus product very little.Adopt the dual overvoltage protection of hardware and software of auxiliary voltage generator, reliability of products is higher.Microprocessor limits the auxiliary generator exciting voltage by temperature and the charge in batteries electric current of gathering storage battery, thereby can limit the charging current of storage battery, prolongs the useful life of storage battery.Solved analog circuit and transferred the defective of parameter difficulty, debug simple and conveniently, be easy to upgrade.
Can adopt the single-chip microcomputer or the microprocessor of other model to design hardware circuit as CPU, ADC (analog to digital converter), the design adopts inner ADC reference voltage, inner ADC realizes the digital-to-analogue conversion function of subsidiary engine feedback voltage, other scheme can adopt outside 12 or the ADC chip of seniority top digit more, and reference voltage can adopt outside accurate reference voltage chip as a reference.The objective of the invention is to adopt with the single-chip microcomputer is that the microprocessor of core reaches traditional analog control circuit of generation.The purpose of this device invention is demand with user, brings volume more small and exquisite to the user under the prerequisite of not obvious increase cost, and flexibility is higher, and reliability is higher, the product that the life-span is longer.Specifically the present invention be exactly the single chip computer AT EMEGA128 with stable performance be the control core, the digital PID of realizing with software algorithm (proportion integration differentiation) reaches traditional analog pid (proportion integration differentiation) control of generation.Demonstrated fully Design of Digital Circuit flexibly, favorable expandability, upgrading easily, the product maintenance workload is little, the demand that can at utmost fully satisfy the user under the prerequisite of not changing hardware circuit.In a single day and there are new algorithm appearance and ripe, the present invention can also pass through the performance of the upgrading raising product of software at any time through the market checking.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. diesel locomotive subsidiary engine control device, it is characterized in that: comprise CPU (1), power circuit (2), crystal oscillating circuit (3), differential filtering circuit (4), communicating circuit (5), overvoltage crowbar (6) and drive circuit (7), power circuit (2) provides power supply for the subsidiary engine control device; Crystal oscillating circuit (3) links to each other with CPU (1), for CPU (1) provides clock pulse; Communicating circuit (5) links to each other with CPU (1), and the subsidiary engine control device carries out network communication by control on serial ports and the locomotive and display unit, simultaneously by the serial ports download control program; Auxiliary generator output voltage feedback becomes the direct voltage of small-signal by differential filtering circuit (4) with the dc voltage conversion of importing, and then feedback voltage is given the internal mode number converter of CPU (1); Overvoltage crowbar (6) links to each other with CPU (1), makes the stable voltage of auxiliary generator output by the exciting current of regulating auxiliary generator; Drive circuit (7) links to each other with CPU (1), drives the exciting current of auxiliary generator.
2. a kind of diesel locomotive subsidiary engine control device according to claim 1; it is characterized in that: described diesel locomotive subsidiary engine control device comprises the battery environment temperature sensing circuit; accumulator plant detects the ambient temperature of storage battery by mounting temperature sensor; carry out communication by I2C bus and CPU; exciting current if temperature is too high to auxiliary generator limits, and realizes the protection of storage battery.
3. a kind of diesel locomotive subsidiary engine control device according to claim 1 and 2, it is characterized in that: storage battery is that described power circuit (2) provides 110V direct voltage, be transformed to direct current 5V by a Switching Power Supply P1 by DC/DC, P3 becomes direct current 12V to direct current 5V through the DC/DC Switching Power Supply, drive circuit is given in power supply, Switching Power Supply P2 is transformed into direct current ± 15V to direct current 5V and powers to the operational amplifier on the subsidiary engine control device circuit board, the ground of direct current 5V and the ground of direct current ± 15V link together by two magnetic beads, realize that by switching power source chip P4 direct current 5V isolation becomes direct current 5V, provides the insulating power supply of communicating circuit.
4. a kind of diesel locomotive subsidiary engine control device according to claim 3, it is characterized in that: when the auxiliary generator output voltage signal changes in the 20V-137.5V scope, carry out signals collecting by differential filtering circuit (4), 20V-137.5V carrying out the high-barrier deviation behind differential filtering circuit (4), the differential DC voltages input signal divides filtering, amplify by amplifying circuit, enter low-pass filter circuit, filtering high order frequency harmonics, export voltage follower to, finally export galvanic current and press.
5. according to claim 1 or 2 or 4 described a kind of diesel locomotive subsidiary engine control device, it is characterized in that: when the auxiliary generator output voltage is in the 0-123V scope, the subsidiary engine control device is operated in normal pwm pulse width modulation mode, carrying out photoelectricity by optical coupling isolation circuit isolates, and carry out signal condition through signal conditioning circuit, enter the metal-oxide-semiconductor drive circuit then, drive the size of auxiliary generator exciting current in the PWM mode; When auxiliary generator output voltage during greater than 123V, auxiliary generator overvoltage feedback drive signal is by light-coupled isolation and carry out signal condition, enters the metal-oxide-semiconductor drive circuit then, excises the auxiliary generator exciting current in the mode of turn-offing metal-oxide-semiconductor.
6. a kind of diesel locomotive subsidiary engine control device according to claim 5, it is characterized in that: described diesel locomotive subsidiary engine control device comprises one road current signal input circuit, when the 0-20mA of transducer current signal is imported, handle by the A/D converter input port that sample resistance and signal conditioning circuit make the voltage signal that produces in the 0-5V scope give CPU (1).
7. a kind of diesel locomotive subsidiary engine control device according to claim 6, it is characterized in that: described diesel locomotive subsidiary engine control device comprises No. one shunt detectable voltage signals input circuit, input signal from shunt, wave shaping circuit after filtration, and carry out acquisition process by electric energy computation chip, give CPU (1) by the I2C bus communication again.
8. a kind of diesel locomotive subsidiary engine control device according to claim 7; it is characterized in that: described overvoltage crowbar (6) comprises the software overvoltage protective module; when CPU (1) detects the auxiliary generator output voltage greater than direct current 125V; CPU (1) produces external interrupt; external interrupt is blocked the pwm signal of CPU (1) output; in the auxiliary generator output voltage is reduced to direct current 0-125V scope; CPU (1) begins the value of feedback by detected auxiliary generator output voltage immediately, the size of passing ratio integral differential dynamic adjustments auxiliary generator output voltage until output voltage stabilization in direct current 110V ± 2V normal range (NR).
9. a kind of diesel locomotive subsidiary engine control device according to claim 8; it is characterized in that: described overvoltage crowbar (6) comprises the hardware over-voltage protection module; auxiliary generator output voltage feedback is by sending into voltage comparator circuit behind the signal conditioning circuit filter shape; when the auxiliary generator output voltage feeds back the protection value of setting greater than the user; high level of voltage comparator circuit output, this high level is divided into two paths of signals:
One the tunnel gives CPU (1) behind the wave shaping circuit after filtration, CPU (1) produces an external interrupt, restriction exciting current output or turn-off excitation output, in auxiliary generator is got back to normal scope after, the size of CPU (1) beginning dynamic adjustments auxiliary generator output voltage; Another road signal is given outside 110V direct current overvoltage indicator light through behind the isolating amplifier circuit.
10. a kind of diesel locomotive subsidiary engine control device according to claim 9, it is characterized in that: described diesel locomotive subsidiary engine control device comprises state indicating device, and state indicating device comprises that indicator of the power supply status, running state of programs indicator light, program download state indicator light, fault show indicator light and alarm condition indicator light.
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| CN103227499A (en) * | 2013-04-07 | 2013-07-31 | 南车戚墅堰机车有限公司 | Intelligent controller of auxiliary generator of railway locomotive |
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| CN104272582B (en) * | 2012-05-11 | 2016-11-30 | 本田技研工业株式会社 | The power control of electric rotating machine |
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| CN106325129A (en) * | 2016-08-31 | 2017-01-11 | 株洲中车时代电气股份有限公司 | Locomotive auxiliary control system and diesel locomotive auxiliary system |
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| CN110053520A (en) * | 2019-05-27 | 2019-07-26 | 上海楞次新能源汽车科技有限公司 | The fuel cell control device of hydrogen fuel cell dynamical system |
| CN112783031A (en) * | 2020-12-30 | 2021-05-11 | 中国科学院长春光学精密机械与物理研究所 | Soft instruction starting control and level signal isolation circuit system |
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