CN203691320U - Electric locomotive variable-frequency speed-regulating system based on DSP and FPGA - Google Patents
Electric locomotive variable-frequency speed-regulating system based on DSP and FPGA Download PDFInfo
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- CN203691320U CN203691320U CN201420007834.0U CN201420007834U CN203691320U CN 203691320 U CN203691320 U CN 203691320U CN 201420007834 U CN201420007834 U CN 201420007834U CN 203691320 U CN203691320 U CN 203691320U
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Abstract
The utility model discloses an electric locomotive variable-frequency speed-regulating system based on a DSP and an FPGA. The system comprises a micro processor, the FPGA, a driver control console, a current detection module, a speed detection module, and an inversion module. The FPGA is connected with the micro processor. The micro processor is connected with the inversion module and the driver control console. The inversion module is connected with a variable frequency motor. The input terminal of the current detection module is connected with the variable frequency motor while the output terminal of the current detection module is connected with the input terminal of an A/D converter. The output terminal of the A/D converter is connected with the FPGA. The input terminal of the speed detection module is connected with the variable frequency motor while the output terminal of the speed detection module is connected with the micro processor. According to the utility model, the one inverter is used to control two motors so that the cost and installation space are saved. The system stability is improved so that the requirement of the electric locomotive control field on the high stability of the system is satisfied.
Description
Technical field
The utility model relates to a kind of electric locomotive frequency conversion speed-adjusting system, particularly a kind of electric locomotive frequency conversion speed-adjusting system based on DSP and FPGA.
Background technology
Being applied at present narrow gauge electric locomotive and the drive system above light rail car is main mainly with DC Transmission greatly.In DC drive system, DC MOTOR CONTROL is simple, but efficiency is lower, maintaining difficulty; A kind of motor for vehicle traction early and adopt the cage type induction motor of vector control, it is simple in structure, sturdy and durable, with low cost, reliable, torque pulsation is low, noise is low, without position transducer, rev limit is high, because induction machine speed regulating control technology reaches its maturity, this makes its relative direct current machine drive system have obvious advantage simultaneously.Adopt now frequency control to replace original DC chopped-wave and resistance trimming motor, not only reduced locomotive maintenance and spillage of material expense, and improved production efficiency, greatly reduced energy consumption.And in the technology of frequency control, the anti-vibration ability of common inverter, impact resistance a little less than, simultaneously also exist the factor that temperature and humidity excursion is large, had a strong impact on the reliability of system.
Summary of the invention
In order to solve the problems of the technologies described above, the utility model provides a kind of simple in structure, good stability, the electric locomotive frequency conversion speed-adjusting system based on DSP and FPGA that cost is low.
The technical scheme that the utility model addresses the above problem is: a kind of electric locomotive frequency conversion speed-adjusting system based on DSP and FPGA, comprise microprocessor, FPGA, driver's control desk, current detection module, speed detection module and inversion module, described FPGA is connected with microprocessor, microprocessor and inversion module, driver's control desk is connected, described inversion module is connected with variable-frequency motor, the input of described current detection module is connected with variable-frequency motor, output is connected with the input of A/D converter, the output of A/D converter is connected with FPGA, the input of described speed detection module is connected with variable-frequency motor, output is connected with microprocessor.
Described inversion module comprises isolation drive module and IGBT module, and the input of isolation drive module is connected with microprocessor, and output is connected with IGBT module, and IGBT module is connected with variable-frequency motor.
The described electric locomotive frequency conversion speed-adjusting system based on DSP and FPGA also comprises level shifting circuit and PC interface circuit, and the input of described level shifting circuit is connected with microprocessor, and output is connected with PC interface circuit.
The described electric locomotive frequency conversion speed-adjusting system based on DSP and FPGA also comprises display module, and described display module is connected with the output of level shifting circuit.
The described electric locomotive frequency conversion speed-adjusting system based on DSP and FPGA also comprises power module, and described power module is connected with microprocessor, FPGA respectively.
Described current detection module is current sensor.
Described speed detection module is velocity transducer.
Described level shifting circuit adopts MAXC232 chip.
The beneficial effects of the utility model are:
(1) DSP and FPGA coordinate to control, and can bring into play advantage separately, realize the high-performance speed regulating control of electric locomotive;
(2) utilize this control system, can shorten product development cycle, reduce development cost, improve development efficiency, and can complete at short notice electric locomotive control system product development and application;
(3) in this control system, control circuit with the output signal of switching value form all by light-coupled isolation and system main circuit interface, guarantee the isolation of strong and weak electricity, improved the stability of a system, can meet the requirement of electric locomotive control field to system high reliability;
(4) with two motors of an inverter control, cost and installing space have been saved.The high efficient area operation in electronic/different operating modes such as generating/regenerative braking feedback and the large range of speeds of Driven by inverter induction machine, power factor is high, and loss is little.Under rated condition, traction electric machine efficiency reaches 85%, and inverter efficiency is greater than 95%, system effectiveness 82%;
(5) in the application of subway building site, starting is steady, staring torque is large, and noise is low; Electric drive, charging, regenerative braking conversion are level and smooth, and motor, inverter temperature rise are normal, and car load power performance is better than similar direct current chopping regulating speed car, and working effect promotes more than 20%.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model.
Fig. 2 is speed detection module circuit diagram of the present utility model.
Fig. 3 is current detection module circuit diagram of the present utility model.
Fig. 4 is control principle structured flowchart of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
As shown in Figure 1, the utility model comprises microprocessor, FPGA, driver's control desk, current detection module, speed detection module, inversion module, level shifting circuit, PC interface circuit, display module and power module, described FPGA is connected with microprocessor, and microprocessor is connected with driver's control desk, includes locomotive control power and mains lighting supply display in driver's control desk, storage battery, divider resistance and voltmeter, handwheel speed regulator, storage battery is to digital control Power supply, this has just guaranteed the convenience of operation and maintenance, described inversion module comprises isolation drive module and IGBT module, the input of isolation drive module is connected with microprocessor, output is connected with IGBT module, IGBT module is connected with variable-frequency motor, described current detection module is current sensor, its input is connected with variable-frequency motor, and output is connected with the input of A/D converter, and the output of A/D converter is connected with FPGA, described speed detection module is velocity transducer, its input is connected with variable-frequency motor, and output is connected with microprocessor, and described level shifting circuit adopts MAXC232 chip, the input of level shifting circuit is connected with microprocessor, output respectively with PC interface circuit, display module be connected, described power module respectively with microprocessor, FPGA is connected.
General inverter just does speed and torque control for a load motor.Drive respectively because locomotive belongs to front and back, for the speed of motor before and after guaranteeing is consistent with moment, two motors need to be exported identical speed and torque.The utility model adopts 4 current sensors to detect respectively the U of two motors in main circuit design, V biphase current, W phase current can according to formula W=-(U+V) calculate.On two motors, load onto respectively velocity transducer, detect the speed of two motors, use as controlling simultaneously.
As shown in Figure 3, A1B, A2B, B1B, B2B is that front motor velocity transducer transmits Si road pulse tach signal, four road signals differ respectively 90 degree, rate signal interface circuit Dui Si road signal carries out shaping to be eliminated after interference signal, obtain the tach signal VCAP1 that two-way differs from mutually 180 degree, VCAP2 is sent to level translator 74LVC164245, gives dsp controller computing after voltage transitions.The effect of this circuit design first through shaping and eliminated interference signal, guarantees the tach signal of input at VCAP1, VCAP2, and VCAP1B, the tach signal of VCAP2B end output is stable, has improved precision and the reliability of control.
As shown in Figure 4, four current signals of the utility model collection are respectively IAIN1, IBIN1, and IAIN2, IBIN2, wherein IAIN1, IBIN1, is the U of front motor, V phase current signal, IAIN2, IBIN2, is the U of rear motor, V phase current signal.IAIN1, IBIN1, IAIN2, IBIN2, Zhe Si road signal, through voltage transformation and the signal processing circuit of MAX430, is transformed into the 5V voltage signal IA1 that can receive to dsp controller, IA2, IB1, IB2.The current signal that Zhe Si road signal is motor, sends into dsp controller, whole system controlled, and owing to detecting four road signals, as long as this four signal deletions or asymmetric information, the system prompting of breaking down, inverter will can not be worked; IAIN1 simultaneously, IBIN1, IAIN2, IBIN2 tetra-road signals are sent into U5A, U5B, these three discharge circuits of U5C, under normal circumstances, amplifier output IA12, IB12, IC12 is the voltage of about four volts, if transducer has fault, output signal, by unbalanced, just can judge that current signal is enough normal as long as detect these three current signals.IA12 simultaneously, IB12, IC12 is the three-phase current signal of frequency converter output, this signal is also input to protective circuit as current actual value.The current signal of input is first passed through shaping and voltage transformation by the effect of this circuit design; owing to gathering the electric current of two motors; can carry out size of current control to two motors simultaneously; thereby guarantee the stable of motor torque and accurately control; in the time that electric current is excessive, can play a protective role, guarantee the fail safe of system.In circuit design, adopt 4 current sensors and two velocity transducers, detect speed and the three-phase current of two motors.In the time that two motor speeds are uneven, the electric current of controlling motor guarantees that both speed keep balance.Realize front and back wheel speed basically identical, reach and control effect simultaneously.
Operation principle of the present utility model is as follows: as shown in Figure 4, current sensor gathers the current signal of motor, and the current signal collecting is input in FPGA, after fpga logic is processed, be passed in DSP by dual port RAM, velocity transducer gathers the rate signal of motor, and the rate signal collecting is delivered in the CAP that is used for specially processing pulse signal in DSP, the electric current gathering by accompanying drawing 4 is input in FPGA, after logical process, be passed in DSP by dual port RAM, DSP exports pwm control signal, control signal is through isolation drive module, control the break-make of the IGBT module in main circuit, realize the AC vector AC speed regulating to motor, in the time of normal operation, by the voltage of the SCI output motor in DSP, electric current, the signals such as speed, and arriving of can observing in display module.The logic fault of system can be detected by FPGA simultaneously; by communicating by letter between Data interrupt and XINT1; can block the output of PWM; reach the object of protective device; these fault-signals are exported to MAXC232 through SCI; on liquid crystal display circuit, fault is shown, have the maintaining of being convenient to.
Claims (8)
1. the electric locomotive frequency conversion speed-adjusting system based on DSP and FPGA, it is characterized in that: comprise microprocessor, FPGA, driver's control desk, current detection module, speed detection module and inversion module, described FPGA is connected with microprocessor, microprocessor and inversion module, driver's control desk is connected, described inversion module is connected with variable-frequency motor, the input of described current detection module is connected with variable-frequency motor, output is connected with the input of A/D converter, the output of A/D converter is connected with FPGA, the input of described speed detection module is connected with variable-frequency motor, output is connected with microprocessor.
2. the electric locomotive frequency conversion speed-adjusting system based on DSP and FPGA according to claim 1, it is characterized in that: described inversion module comprises isolation drive module and IGBT module, the input of isolation drive module is connected with microprocessor, output is connected with IGBT module, and IGBT module is connected with variable-frequency motor.
3. the electric locomotive frequency conversion speed-adjusting system based on DSP and FPGA according to claim 2, it is characterized in that: also comprise level shifting circuit and PC interface circuit, the input of described level shifting circuit is connected with microprocessor, and output is connected with PC interface circuit.
4. the electric locomotive frequency conversion speed-adjusting system based on DSP and FPGA according to claim 3, is characterized in that: also comprise display module, described display module is connected with the output of level shifting circuit.
5. the electric locomotive frequency conversion speed-adjusting system based on DSP and FPGA according to claim 3, is characterized in that: also comprise power module, described power module is connected with microprocessor, FPGA respectively.
6. the electric locomotive frequency conversion speed-adjusting system based on DSP and FPGA according to claim 3, is characterized in that: described current detection module is current sensor.
7. the electric locomotive frequency conversion speed-adjusting system based on DSP and FPGA according to claim 3, is characterized in that: described speed detection module is velocity transducer.
8. the electric locomotive frequency conversion speed-adjusting system based on DSP and FPGA according to claim 3, is characterized in that: described level shifting circuit adopts MAXC232 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420007834.0U CN203691320U (en) | 2014-01-07 | 2014-01-07 | Electric locomotive variable-frequency speed-regulating system based on DSP and FPGA |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420007834.0U CN203691320U (en) | 2014-01-07 | 2014-01-07 | Electric locomotive variable-frequency speed-regulating system based on DSP and FPGA |
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| CN203691320U true CN203691320U (en) | 2014-07-02 |
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| CN201420007834.0U Expired - Fee Related CN203691320U (en) | 2014-01-07 | 2014-01-07 | Electric locomotive variable-frequency speed-regulating system based on DSP and FPGA |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109856751A (en) * | 2018-12-27 | 2019-06-07 | 上海津信变频器有限公司 | Deep-sea cable laying drum type cable laying machine and its laying method |
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2014
- 2014-01-07 CN CN201420007834.0U patent/CN203691320U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109856751A (en) * | 2018-12-27 | 2019-06-07 | 上海津信变频器有限公司 | Deep-sea cable laying drum type cable laying machine and its laying method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20160107 |