CN101951217B - Diesel locomotive auxiliary engine control device - Google Patents
Diesel locomotive auxiliary engine control device Download PDFInfo
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- CN101951217B CN101951217B CN2010102522671A CN201010252267A CN101951217B CN 101951217 B CN101951217 B CN 101951217B CN 2010102522671 A CN2010102522671 A CN 2010102522671A CN 201010252267 A CN201010252267 A CN 201010252267A CN 101951217 B CN101951217 B CN 101951217B
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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 accomplished 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 of products, volume and price.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 (PID) 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 (like 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 through battery temp, prolongs the life-span of storage battery.
Summary of the invention
The present 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 parameter errors such as resistance, electric capacity are 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 present 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 through control on serial ports and the locomotive and display unit, simultaneously through the serial ports download control program; Auxiliary generator output voltage feedback becomes the direct voltage of small-signal through 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 through 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, and accumulator plant detects the ambient temperature of storage battery through mounting temperature sensor, through I
2C bus and CPU carry out communication, and the exciting current if temperature is too high to auxiliary generator limits, and realize the protection of storage battery.
As the further execution mode of the present invention; Storage battery is that described power circuit provides 110V direct voltage; Be transformed to direct current 5V by a Switching Power Supply P1 through DC/DC, P3 becomes direct current 12V to direct current 5V through the DC/DC Switching Power Supply, and drive circuit is given in power supply; Switching Power Supply P2 is transformed into direct current ± 15V to direct current 5V and supplies power 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 through 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, carry out signals collecting in the 20V-137.5V scope through 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 through amplifying circuit, get into 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, carries out photoelectricity through optical coupling isolation circuit and isolates, and carry out signal condition through signal conditioning circuit; Get into the metal-oxide-semiconductor drive circuit then, drive the size of auxiliary generator exciting current with the PWM mode; When auxiliary generator output voltage during greater than 123V, auxiliary generator overvoltage feedback drive signal is through light-coupled isolation and carry out signal condition, gets into the metal-oxide-semiconductor drive circuit then, excises the auxiliary generator exciting current with 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 through 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, from the input signal of shunt, through filtering shaping circuit; And carry out acquisition process through electric energy computation chip, pass through I again
2The C bus communication is given CPU.
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, and 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 through 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, and auxiliary generator output voltage feedback is through 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: give CPU behind one tunnel process filtering shaping circuit, 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.
Through 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 monitoring of accumulator cell charging and discharging real-time current, the subsidiary engine soft start function can be realized the charge in batteries Current Control through 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; Obviously, the 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
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, 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 are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
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 through 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 through 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 through 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 through detecting auxiliary voltage generator and charge in batteries electric current and battery temp through pid control mode driven MOS pipe; Size through 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 power supply to subsidiary engine control device each several part circuit to be provided.Power supply provides direct current 110V voltage by storage battery, is transformed to direct current 5V (representative value) by a Switching Power Supply P1 through DC/DC, and input and output ground isolates.This power supply supplies whole device analog circuit and part digital circuit to use.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 supplies power to operational amplifier on the circuit board, and the ground of direct current 5V and the ground of direct current ± 15V link together through 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 is as shown in Figure 3.
The differential filtering signal acquisition circuit: auxiliary generator auxiliary generator output voltage feedback becomes the direct voltage of small-signal through the differential filtering circuit with the dc voltage conversion of input, then feedback voltage is given the internal mode number converter of ATEMEGA128.When voltage signal changed in the 20V-137.5V scope, the differential filtering circuit that constitutes through amplifier carried out signals collecting, and capacitance-resistance LPF 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 through the two, interference signal effectively be input as zero, this has just reached the purpose of anti-common mode disturbances.Differential signal gets into 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 through other controls on RS422/485 serial ports and the locomotive, display unit, and control program also can be downloaded through the RS422/485 serial ports simultaneously, and the communicating circuit sketch map is seen accompanying drawing 5.The design's purpose is at direct current 110V ± 2V the output voltage stabilization that makes auxiliary generator through the exciting current of regulating auxiliary generator; But, be 0 to realize the overvoltage protection of auxiliary generator output voltage until exciting current through 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.Be reduced to direct current (after in 0-125V) the scope up to the auxiliary generator output voltage; Single-chip microcomputer begins the value of feedback through detected auxiliary generator output voltage immediately, the size through PID (PID) 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 through 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 through giving CPU behind the filtering shaping circuit, 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; Through light-coupled isolation and carry out signal condition, get into the metal-oxide-semiconductor drive circuit then, drive auxiliary generator exciting current size with the PWM mode.When auxiliary voltage generator during greater than 123V, auxiliary generator overvoltage feedback drive signal is through light-coupled isolation and carry out signal condition, gets into the metal-oxide-semiconductor drive circuit then, excises the auxiliary generator exciting current with the mode of turn-offing metal-oxide-semiconductor.
On panel, make 8 indicator lights, be used for indicating 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 through 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 through mounting temperature sensor TMP175, through I
2C and single-chip microcomputer carry out communication, limit the auxiliary generator exciting current if temperature is too high, realize the protection of storage battery.
1 road current signal input circuit.When transducer 0-20mA current signal, make the voltage signal that produces in the 0-5V scope give Chip Microcomputer A/D input port through 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 through electric energy computation chip ADE7753 on the shunt, passes through I again
2Chip Microcomputer A tmega128 is given in the C communication.
It is the digital control technology of core that the present invention adopts with single chip computer AT EMEGA128, adopts software control algorithm to realize the accurate control to auxiliary generator motor output voltage.Device is pasted on a large amount of surfaces of adopting, and has reduced the volume of product, improves product reliability simultaneously, for the user has saved the 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 through the mode of software upgrading, flexibility is high.Can download by serial ports through 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 through 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 need not changed any hardware circuit and only needed upgrade software to get final product.The RS422/485 serial communication circuit, as shown in Figure 5, can easily download and program on-line fault diagnosis function through serial ports of computers communication realization program, do not need relieving attachment just can accomplish on-line fault diagnosis and program download and upgrade function.Solve analog circuit and transferred the difficult defective of parameter.Adopt the hardware circuit of 8 ATMEGA128 single-chip microcomputers for the control core, realize the closed-loop control to auxiliary voltage generator through software algorithm, 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 software and just can realize the upgrading product replacement.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 need not 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 through 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 come the 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, and 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 for the conventional analogue control circuit.The purpose of this device invention is demand with user, under the prerequisite of not obvious increase cost, brings volume more small and exquisite to the user, and flexibility is higher, and reliability is higher, the product that the life-span is longer.The present invention is exactly that to use the single chip computer AT EMEGA128 of stable performance be the control core specifically, and the digital PID of realizing with software algorithm (PID) reaches for conventional analogue PID (PID) to be controlled.Demonstrated fully Design of Digital Circuit flexibly, favorable expandability, upgrading easily, the product maintenance workload is little, the demand that can at utmost under the prerequisite of not changing hardware circuit, fully satisfy the user.In a single day and there are new algorithm appearance and ripe, the present invention can also pass through the upgrading raising performance of products 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 improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (8)
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 through control on serial ports and the locomotive and display unit, simultaneously through the serial ports download control program; Auxiliary generator output voltage feedback becomes the direct voltage of small-signal through differential filtering circuit (4) with the dc voltage conversion of importing, and then this direct 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 through 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; Storage battery is the each several part circuit supply of diesel locomotive subsidiary engine control device through connecting power circuit; Accumulator plant detects the ambient temperature of storage battery through mounting temperature sensor, and passes through I
2C bus and CPU carry out communication, and the exciting current if temperature is too high to auxiliary generator limits, and realize 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 through DC/DC, P3 becomes direct current 12V to direct current 5V through the DC/DC Switching Power Supply, and drive circuit is given in power supply; Switching Power Supply P2 is transformed into direct current ± 15V to direct current 5V and supplies power 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 through 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 through differential filtering circuit (4), 20V-137.5V differential dc voltages input signal carries out the high-barrier deviation and divides filtering behind differential filtering circuit (4), amplify through amplifying circuit; Get into low-pass filter circuit; Filtering high order frequency harmonics exports voltage follower to, finally exports galvanic current and presses.
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, carries out photoelectricity through optical coupling isolation circuit and isolates, and carry out signal condition through signal conditioning circuit; Get into the metal-oxide-semiconductor drive circuit then, drive the size of auxiliary generator exciting current with the PWM mode; When auxiliary generator output voltage during greater than 123V, auxiliary generator overvoltage feedback drive signal is through light-coupled isolation and carry out signal condition, gets into the metal-oxide-semiconductor drive circuit then, excises the auxiliary generator exciting current with 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 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 was reduced to direct current 0-125V scope, CPU (1) began the value of feedback through 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).
7. a kind of diesel locomotive subsidiary engine control device according to claim 6; It is characterized in that: described overvoltage crowbar (6) comprises the hardware over-voltage protection module; Auxiliary generator output voltage feedback is through 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:
Give CPU (1) behind one tunnel process filtering shaping circuit; 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.
8. a kind of diesel locomotive subsidiary engine control device according to claim 7; 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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| CN2010102522671A CN101951217B (en) | 2010-08-13 | 2010-08-13 | Diesel locomotive auxiliary engine control device |
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| CN2010102522671A CN101951217B (en) | 2010-08-13 | 2010-08-13 | Diesel locomotive auxiliary engine control device |
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| CN201314947Y (en) * | 2008-12-15 | 2009-09-23 | 福建省力禾电子工程有限公司 | Battery-detecting instrument |
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| JPS60237899A (en) * | 1984-05-10 | 1985-11-26 | Kawasaki Heavy Ind Ltd | Engine generator |
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| CN2345706Y (en) * | 1998-12-03 | 1999-10-27 | 铁道部株洲电力机车研究所 | Diesel locomotive auxiliary engine control device |
| CN201314947Y (en) * | 2008-12-15 | 2009-09-23 | 福建省力禾电子工程有限公司 | Battery-detecting instrument |
| CN101510747A (en) * | 2009-03-27 | 2009-08-19 | 华中科技大学 | Excitation control system architecture and control method for marine diesel brushless double fed shaft generator |
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| CN101951217A (en) | 2011-01-19 |
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