CN206067538U - Locomotive engine speed governing analog based on MSP430 - Google Patents

Abstract

The utility model discloses a kind of locomotive engine speed governing analog based on MSP430, including MSP430 single-chip microcomputers etc..This utility model is the change for being acquired locomotive handle level in real time with single-chip microcomputer, further according to the difference of handle level, single-chip microcomputer exports 3 road PWM pwm voltages, control silicon rectifier, and then control the angle of flow@of IGCT, cut-offfing for control three sections of bridges of locomotive, realizes the voltage of control locomotive engine, realizes the speed governing of locomotive.

Description

Locomotive engine speed governing analog based on MSP430

Technical field

This utility model belongs to locomotive engine technical field, and in particular to a kind of locomotive engine speed governing mould based on MSP430 Intend device.

Background technology

Fig. 1 is that the rectifying and pressure-regulating for holding bogie unit simplifies circuit.Tractive winding a1-b1-x1, a2-x2 voltage effective value 686.8V is, and wherein a1-b1, b1-x1 is 343.4V, three sections of not decile rectifier bridges is constituted with corresponding commutator.First open IGCT T5, the T6 for the rectifier bridge powered by tractive winding a2-x2, order phase shift, commutating voltage are gradually increased to 1/2Ud by zero. Rectified current is by diode D1, D2 and D5, D6 afterflows.In the positive half period of power supply, electric current is by tractive winding a2 → T5 → D2 71 → smoothing reactor of → wire → traction motor armature → Main-pole windings → 72 → D5 of wire → D4 → x2 → a2, works as power supply During negative half-cycle, electric current by tractive winding x2 → D3 → D2 → D1 → 71 → smoothing reactor of wire → traction motor armature → Main-pole windings → 72 → D6 of wire → T6 → a2 → x2.At this moment the element alternating conductive of second segment bridge, the rectifier tube of first paragraph bridge D1, D2 play afterflow effect.When full gate is put by IGCT T5, T6, but during also less than opening, put into the rectification of winding a1-b1 sections Bridge, triggers T1, T3, and T5, T6 continues to full gate and put.When power supply is positive half period, if triggering T3 in phased angle α, Electric current is by a1 → D1 → 71 → smoothing reactor of wire → traction motor armature Main-pole windings → 72 → D5 of wire → D4 → x2 →a2→T5→T3→b1→a1.When power supply negative half-cycle, then electric current is by b1 → T1 → 71 → smoothing reactor of wire → lead Draw motor armature → Main-pole windings → 72 → D2 of wire → T6 → a2 → x2 → D3 → D2 → a1 → b1.From it is above different It is T1, D2 conducting, T3, D1 end.T1, T3 order phase shift.Commutating voltage is adjusted between 1/2Ud to 3/4Ud.When winding a1- When full gate is put by b1 section rectifier bridges, the rectifier bridge of winding b1-x1 sections is put into, and its process is similar with front.T2, T4 order phase shift, it is whole Stream voltage is adjusted between 3/4Ud to Ud.In the outfan of commutator in parallel resistance 75R and 76R, the effect of its resistance has two It is individual：One be locomotive high-voltage zero load do pressure limiting test when, make the load of commutator, play afterflow act on；Two when being up, can Absorb part overvoltage.

In Fig. 2, single phase half wave controlled rectifier output voltage average value is U=0.45U2 (1+cos@)/2.U2 is transformation The Secondary Winding of device, is pilot angle, changes pilot angle and can just change output voltage U.@is less, and U is bigger, when@=0, brilliant Brake tube is turned on entirely, and output is maximum, as@=∏, is output as 0.And the control of angle is controlled by silicon rectifier controller. Control is 10K given sides, so as to control@angles, so as to controlling the conducting of the IGCT of main circuit and then controlling the electricity of main circuit Pressure output.

Utility model content

The purpose of this utility model is to overcome a kind of locomotive engine speed governing mould based on MSP430 of above-mentioned not enough offer Intend device.

Locomotive engine speed governing analog of this utility model based on MSP430, including MSP430 single-chip microcomputers, also including handss Handle level acquisition module ADC0, first paragraph bridge voltage output module ADC1, second segment bridge voltage output module ADC2, the 3rd section of bridge Voltage output module ADC3, first paragraph bridge PWM outputs and LED, second segment bridge PWM outputs and LED, the 3rd section of bridge PWM are defeated Go out and LED and for showing liquid crystal display that collection voltages and three sections of bridges are opened, the handle level acquisition module ADC0 Signal output part be connected with the signal input part of MSP430 single-chip microcomputers, the signal of the first paragraph bridge voltage output module ADC1 Outfan is connected with the signal input part of MSP430 single-chip microcomputers, the signal output part of the second segment bridge voltage output module ADC2 Be connected with the signal input part of MSP430 single-chip microcomputers, the signal output part of the 3rd section of bridge voltage output module ADC3 with The signal input part of MSP430 single-chip microcomputers is connected, the signal output part of the MSP430 single-chip microcomputers export with first paragraph bridge PWM and The signal input part of LED is connected, and the signal output part of the MSP430 single-chip microcomputers is exported with second segment bridge PWM and LED Signal input part is connected, the signal input of the signal output part of the MSP430 single-chip microcomputers and the 3rd section of bridge PWM outputs and LED End is connected, and the signal output part of MSP430 single-chip microcomputers is connected with the signal input part of liquid crystal display.

Further, also including fault interrupting and processing module, in the signal output part and failure of the MSP430 single-chip microcomputers Disconnected and processing module input is connected.

Further, the handle level acquisition module ADC0 includes the 19th resistance R19 and the 20th resistance R20, described 1 foot of the 19th resistance R19 connects 3.3V power supplys, and 2 feet of the 19th resistance R19 connect 1 foot of the 20th resistance R20, and second The 2 feet ground connection of ten resistance R20,3 feet of the 20th resistance R20 access the P6.0 mouths of MSP430 single-chip microcomputers.

A kind of handle level acquisition module, including the 19th resistance R19 and the 20th resistance R20, the 19th resistance 1 foot of R19 connects 3.3V power supplys, and 2 feet of the 19th resistance R19 connect 1 foot of the 20th resistance R20, the 20th resistance R20's 2 feet are grounded, and 3 feet of the 20th resistance R20 access the P6.0 mouths of MSP430 single-chip microcomputers.

This utility model is the change for being acquired locomotive handle level in real time with single-chip microcomputer, further according to handle level not Together, single-chip microcomputer exports 3 road PWM pwm voltages, controls silicon rectifier, and then the angle of flow of control IGCT, controls locomotive Cut-offfing for three sections of bridges, realizes the voltage of control locomotive engine, realizes the speed governing of locomotive.

Description of the drawings

Fig. 1 is main circuit of electric locomotive schematic diagram；

Fig. 2 is silicon rectifier controller circuitry schematic diagram；

Fig. 3 is this utility model schematic diagram of device；

Fig. 4 is the power circuit diagram used by this utility model；

Fig. 5 is that AMS1117 produces 3.3v potential circuit figures；

Fig. 6 is handle level acquisition module ADC0 circuit diagrams；

Fig. 7 is utility model works method flow diagram.

Specific embodiment

This utility model is further described below in conjunction with specific embodiment：

Locomotive engine speed governing analog of this utility model based on MSP430, including MSP430 single-chip microcomputers, also including handss Handle level acquisition module ADC0, first paragraph bridge voltage output module ADC1, second segment bridge voltage output module ADC2, the 3rd section of bridge Voltage output module ADC3, first paragraph bridge PWM outputs and LED, second segment bridge PWM outputs and LED, the 3rd section of bridge PWM are defeated Go out and LED and for showing liquid crystal display that collection voltages and three sections of bridges are opened, the handle level acquisition module ADC0 Signal output part be connected with the signal input part of MSP430 single-chip microcomputers, the signal of the first paragraph bridge voltage output module ADC1 Outfan is connected with the signal input part of MSP430 single-chip microcomputers, the signal output part of the second segment bridge voltage output module ADC2 Be connected with the signal input part of MSP430 single-chip microcomputers, the signal output part of the 3rd section of bridge voltage output module ADC3 with The signal input part of MSP430 single-chip microcomputers is connected, the signal output part of the MSP430 single-chip microcomputers export with first paragraph bridge PWM and The signal input part of LED is connected, and the signal output part of the MSP430 single-chip microcomputers is exported with second segment bridge PWM and LED Signal input part is connected, the signal input of the signal output part of the MSP430 single-chip microcomputers and the 3rd section of bridge PWM outputs and LED End is connected, and the signal output part of MSP430 single-chip microcomputers is connected with the signal input part of liquid crystal display.This device also includes Fault interrupting and processing module, signal output part and fault interrupting and the processing module input phase of the MSP430 single-chip microcomputers Even.

The handle level acquisition module ADC0 includes the 19th resistance R19 and the 20th resistance R20, and the described 19th is electric 1 foot of resistance R19 connects 3.3V power supplys, and 2 feet of the 19th resistance R19 meet 1 foot of the 20th resistance R20, the 20th resistance R20 2 feet ground connection, 3 feet of the 20th resistance R20 access the P6.0 mouths of MSP430 single-chip microcomputers.

The described locomotive engine speed governing analog based on MSP430, its method of work are comprised the following steps：

Step 1:Carry out Single Chip Microcomputer (SCM) program initialization：Timer parameter setting, liquid crystal display screen initial state setting, timer interruption end Mouth parameter setting and the definition of display lamp output port；

Step 2：Input signal analog-to-digital conversion initiation parameter is arranged；

Step 3：Whether inquiry meets system start-up condition, looks into into corresponding interrupt routine condition if condition is met Ask, otherwise program is continued waiting for；

Step 4：Interrupt condition is inquired about, and is met interrupt condition then execution step 5, is carried out interrupt condition first into the program Inquiry, and perform and meet the interrupt routine of condition；Otherwise execution step 6 carries out the signals collecting of handle level parameter value Program；The interrupt condition is included whether faulty and whether has button operation.

Step 5：Interruption subroutine；

Step 6：Remove liquid crystal display screen to show；

Step 7：Parameter acquisition is performed in using subprogram, the sampling number for inquiring setting of being in order then is performed and adopted Sample display subroutine, otherwise returns to step 4.Continue the program operation that step 4 starts.

It is control system core that this utility model is the MSP430 single-chip microcomputers based on TI companies, using the AD inside single-chip microcomputer Real-time Collection is carried out to locomotive handle level, further according to handle level, using SCM PWM pulsewidth output voltage control locomotive main The voltage output of circuit rectifies bridge, so as to the speed of controlled motor.The major design core of the design is to replace 10K with single-chip microcomputer Given side, so as to realize Real-time Collection handle level, realizes the intelligence control to motor speed according to the output of level control voltage System and regulation.

According to the predetermined basic demand of system, the system will complete the Real-time Collection to handle level, further according to handle level Position exports corresponding voltage motor, again Real-time Collection main circuit actual output voltage, then judges to compare, while will be to event Barrier is processed accordingly, and the requirement to system is very high.And the realization of whole system, need to use single-chip microcomputer and whole circuit Power supply.

MSP430F169 is multiple functional, small power consumption.First, the supply voltage of MSP430 series monolithics uses 1.8 ～3.6V voltages.MSP430 series monolithics are the mixed type single-chip microcomputers of super low-power consumption, are 280uA under activity pattern, standby mould Formula is 1.1uA, thus which is when running under the Clock of 8MHz, and the electric current of chip can be in 200～400uA or so, and clock is closed The lowest power consumption of disconnected pattern only has 0.1uA.It has external equipment and convenient, flexible exploitation handss in extremely low power consumption, abundant piece Section.Secondly, MSP430 single-chip microcomputers are the single-chip microcomputers of 16, employ reduced instruction set computer (RISC) structure, 125 instruction cycles.It is many In many depositors and piece, data storage can all participate in various computings.Additionally, 430 have numerous modules and interrupt mode, And, carry 12,8 tunnel ADC and 12,2 tunnels DAC module inside it, two intervalometers of also timerA and timerB, TimerA has 3 tunnels, and timerB has 7 tunnels.It can realize timing, counting, non-inverting input voltage, also capture lamp feature richness Function.It also has the supply voltage manager/monitor of the flat detection of programmable point.And for MSP430 is serial, not only There is these internal module, also introduced Flash types program storage and JIAG technologies, it is possible to achieve online programming.And its valency Also than less expensive, just because of MSP430 single-chip microcomputers have these functions, MSP430 series of products disclosure satisfy that the system to lattice.Comprehensively examine Us are considered from (MSP430F169 single-chip microcomputers) as system MCU.

1.8v～the 3.6v of the running voltage of MSP430 single-chip microcomputers, it is desirable to provide the running voltage of 3.3v, liquid crystal display drive Galvanic electricity pressure is also required to the voltage of 3.3v, and level voltage is 3.3v.From the Switching Power Supply of LM2576.Switching Power Supply 1 is to utilize Modern power electronics technology, the time ratio that controlling switch pipe is turned on and off maintain a kind of power supply of regulated output voltage, open Powered-down source is typically made up of pulse width modulation (PWM) control IC and MOSFET.The effective course of work of PWM Switching Power Supplies is logical Cross " copped wave ", i.e., the DC voltage of input is cut into pulse voltage of the amplitude equal to input voltage amplitude realizing.Pulse Dutycycle is adjusted by the controller of Switching Power Supply.Once input voltage is cut into ac square wave, its amplitude just can be by becoming Depressor is being raised and lowered.The voltage group number of output can just be increased by increasing the Secondary Winding number of transformator.It is last these AC wave shape just obtains VD after rectifying and wave-filtering.

The voltage feedback circuit of linear power supply is to be operated in linear condition, and Switching Power Supply refers to the pipe for Voltage Cortrol It is operated in the i.e. on off state in saturation, cut-off region.From from its main feature：Linear power supply technology is very ripe, cost of manufacture compared with It is low, can reach very high degree of stability, ripple also very little, and there is no interference and noise that Switching Power Supply has, but its volume For Switching Power Supply, comparison is huge, and input voltage range has high demands；And Switching Power Supply is in contrast.Switching Power Supply is The new technology of comparison, it has many advantages, its small power consumption.Much higher than popular three terminal regulator of efficiency, are preferable Substitute.For, in the system, Jing considers, the power supply in the system adopts Switching Power Supply, chip with LM2576 and AMS1117.LM2576 is monolithic integrated optical circuit, can provide the various functions of step-down switching regulator, the input voltage of LM2576 Maximum can be 40v, can drive the load of 3A.Ensure in the case where input voltage and output load condition is specified output voltage ± 4 ﹪ errors, and the error of ± 10 ﹪ of oscillator frequency.Its work efficiency is up to shaking containing fixed frequency inside 70 ﹪～90 ﹪ Swing device (52KHz) and benchmark manostat (1.23v), and with perfect protection circuit, including current limit and Thermal shutdown circuit Deng only needing to few peripheral components using the device and just may make up efficient mu balanced circuit.

The system is to be acquired the change of locomotive handle level in real time with single-chip microcomputer, further according to the difference of handle level, Single-chip microcomputer exports 3 road PWM pwm voltages, controls silicon rectifier, and then the angle of flow of control IGCT, controls locomotive three Bridge cut-off cut-offs, and realizes the voltage of control locomotive engine, and realize locomotive can only speed governing.

This utility model is started by power module, one-chip computer module, reset key module, Liquid Crystal Module, Electrical key and event The compositions such as barrier analogue-key module, handle level module, ADC collection output voltage modules, output and display module.

Power supply produces 5v voltages using LM2576, then Jing AMS1117 produce 3.3v.The DC source obtained after rectification LM2576 is accessed by 1 foot of U2,1 foot connects 1 foot (C6 is non-electrolytic capacitor) of the positive pole (1 foot) of C5, C6 respectively.2 feet of U2 Position 5V power output ends, connect D5 (6V Zener diodes) 2 feet (negative pole), and 4 feet of U2 are power supply feedback input end, wherein 2 feet, 4 Foot accesses inductance L1.2 feet of L1 are 5V power output ends, connect 1 foot (C7 is non-electrolytic capacitor), the positive pole (1 foot) of C8 of C7.D7 For power work display lamp, R3 is current-limiting resistance.Wherein D7 positive poles (1 foot) connect 5V power supplys, and 2 feet (negative pole) meet current-limiting resistance R3 1 foot.The negative pole (2 foot) of C5,2 feet of C6,3,5 feet of U2, the positive pole (1 foot) of D5, the negative pole (2 foot) of C8,2 feet of C7, R3 2 feet be grounded.

Premenstrual two stage filter is input into chip, then 2 feet of Jing output 5v voltages, and D5 is stabilivolt.The selection of inductance L1 will basis The parameters such as the output voltage of LM2576, maximum input power, maximum load current are selected.Calculate according to formula：BT=(Vin- Vout) × Vout/Vin × 1000/f. is accordingly selecting inductance, the design inductance value to adopt 100uH.The filtering of electric capacity also according to The magnitude of voltage of output input is calculating.

5v voltages out again Jing AMS1117 produce 3.3v voltage,

AMS1117 regulator designs are used to provide 1A output currents and operting differential pressure can as little as 1V.In maximum output current When, the pressure reduction of AMS1117 devices ensures maximum less than 1.3V, and is gradually lowered with the reduction of load current.

Handle level is powered with 3.3v, 33 Europe partial pressures of Jing, change voltage of the potentiometer from 0 to 2.5v is adopted to single-chip microcomputer Collection, because the ADC collection voltages scopes of single-chip microcomputer are 2.5v.With light emitting diode representing when handle level is gathered.Root According to handle level, PWM voltage outputs to be exported to single-chip microcomputer, carry out Real-time Collection.According to handle level, single-chip microcomputer be exported PWM voltage outputs, carry out Real-time Collection.By the voltage of output Jing after electric capacity and resistance are filtered, another the two of single-chip microcomputer are tapped into Individual ADC digital-to-analogue conversions are acquired.Voltage in controlled output is compared according to the data for collecting and handle level, is realized The closed loop control of output voltage.So it is that system is more improved and stablized.

Single-chip microcomputer carries out data processing Jing after AD conversion to the data that the collection of handle level is come in and obtains accurate magnitude of voltage. Again the output valve of the actual control voltage for collecting is compared with handle level, standard value, the rectifier bridge opened and event Barrier is shown in LCDs, while also with lamp showing, when a certain section of bridge voltage rises, LED is dodged Bright, three sections of bridges export full voltages, just light yellow always.Glitch and major break down are simulated with two buttons.When handle level rises When, single-chip microcomputer output control voltage also rises；When handle level declines, single-chip microcomputer output voltage also declines；Buzzing during glitch Device is reported to the police, and second and third section of bridge disconnects；When major break down, buzzer warning, three sections of bridges break entirely.

Claims (3)

1. a kind of locomotive engine speed governing analog based on MSP430, including MSP430 single-chip microcomputers, it is characterised in that：Also include Handle level acquisition module ADC0, first paragraph bridge voltage output module ADC1, second segment bridge voltage output module ADC2, the 3rd section Bridge voltage output module ADC3, first paragraph bridge PWM are exported and LED, second segment bridge PWM outputs and LED, the 3rd section of bridge PWM Output and LED and for showing liquid crystal display that collection voltages and three bridge cut-off are opened, the handle level acquisition module The signal output part of ADC0 is connected with the signal input part of MSP430 single-chip microcomputers, the first paragraph bridge voltage output module ADC1's Signal output part is connected with the signal input part of MSP430 single-chip microcomputers, and the signal of the second segment bridge voltage output module ADC2 is defeated Go out end be connected with the signal input part of MSP430 single-chip microcomputers, the signal output part of the 3rd section of bridge voltage output module ADC3 and The signal input part of MSP430 single-chip microcomputers is connected, the signal output part of the MSP430 single-chip microcomputers export with first paragraph bridge PWM and The signal input part of LED is connected, and the signal output part of the MSP430 single-chip microcomputers is exported with second segment bridge PWM and LED Signal input part is connected, the signal input of the signal output part of the MSP430 single-chip microcomputers and the 3rd section of bridge PWM outputs and LED End is connected, and the signal output part of MSP430 single-chip microcomputers is connected with the signal input part of liquid crystal display.

2. the locomotive engine speed governing analog based on MSP430 according to claim 1, it is characterised in that：Also include event Barrier interrupts and processing module, and the signal output part of the MSP430 single-chip microcomputers is connected with fault interrupting and processing module input.

3. the locomotive engine speed governing analog based on MSP430 according to claim 2, it is characterised in that：The handle Level acquisition module ADC0 includes the 19th resistance R19 and the 20th resistance R20, and 1 foot of the 19th resistance R19 meets 3.3V Power supply, 2 feet of the 19th resistance R19 connect 1 foot of the 20th resistance R20, and 2 feet of the 20th resistance R20 are grounded, and the 20th 3 feet of resistance R20 access the P6.0 mouths of MSP430 single-chip microcomputers.