CN201383794Y

CN201383794Y - Inverting control device of power supply trolley locomotive

Info

Publication number: CN201383794Y
Application number: CN200920096329U
Authority: CN
Inventors: 张德宽
Original assignee: Tianjin Fangyuan Electric Co Ltd
Current assignee: Tianjin Fangyuan Electric Co Ltd
Priority date: 2009-04-16
Filing date: 2009-04-16
Publication date: 2010-01-13
Anticipated expiration: 2019-04-16

Abstract

The utility model relates to an inverting control device of a power supply trolley locomotive, which comprises a pantograph, a bow detachment hardware detecting circuit, a DSP controlling module, an inverter driving circuit, an inverting bridge and an asynchronous motor, wherein one end of the pantograph is connected with a trolley network while the other end of the pantograph is connected with an input end of the bow detachment hardware detesting circuit, an output end of the bow detachment hardware detecting circuit is connected with an input end of the DSP controlling module, an output end of the DSP controlling module is connected with the inverter driving circuit and the inverting bridge, and the inverter driving circuit and the inverting bridge are connected with the asynchronous motor. The inverting controlling device adopts the combination of the bow detachment hardware detecting circuit and the DSP controlling module, achieves stable transition of a non-electricity leap-over mode of a traction system, improves traction efficiency, avoids current shock caused by the restoration of the electric network, has the advantages of short leaping time, reliable performance and wide applicable range, and is extremely adaptable to work conditions of domestic power supply trolley traction engines.

Description

The inversion control device of trolley locomotive

Technical field

The utility model belongs to the trolley locomotive field, especially a kind of inversion control device of trolley locomotive.

Background technology

In the trolley locomotive field, owing to be subjected to the mains supply condition and the switched-mode power supply mode confinement of the circuit of growing up, pantograph (front end power taking device) faces inevitably takes off bow in short-term or forms dead electricity phenomenon in short-term through no electric subregion, cause the bus direct voltage to exhaust and cause inverter direct current under voltage through regular meeting, make trailer system enter the under voltage protection state; After electrical network restored electricity through the short time power down process again, trailer system certainly will restart, and not only formed bigger dynamic current, and must carry out necessary initialization of variable because of restarting trailer system, caused propulsive efficiency to reduce significantly.In order to overcome the problems referred to above, usually can adopt inverter detection of dynamic DC bus-bar voltage to realize having the transfer process of electricity and no electrician's operation mode, change original speed closed loop into the direct voltage closed loop when promptly entering non-Electric region, reaching with the direct voltage is the override mode on control order ground; After direct voltage enters normal range of operation once more, system withdraws from override mode naturally and transfers conventional traction mode (speed control mode) to, this technical scheme enters and withdraws from the direct voltage threshold values for no electric override mode and has closely restriction relation mutually, has big limitation for the bigger supply network of fluctuation range.In fact, the actual fluctuation range of China industrial and mining enterprises stringing supply network is often very big, particularly the supply line of some old mines is long, degree of aging is serious, track refluxes not smooth, cause power supply tip voltage lower, terminal pressure drop surpasses 50% of nominal supply voltages when serious, make that the nothing electricity is crossed over the value of entering and the value of keeping will be very low, trailer system control power requirement is quite harsh like this, and after power system restoration power supply because of the existence of the intrinsic dc capacitor of inverter, certainly will cause bigger rush of current, thereby influence system's smooth transition non-Electric region.

Summary of the invention

Be to overcome the deficiencies in the prior art order of the present utility model, a kind of inversion control device of novel trolley locomotive is proposed, this inverse control system adopts and takes off the control mode that the bow hardware detecting circuit combines with the control of DSP control module, broken away from and do not had the mutual restriction relation that electric override mode entered and withdrawed from the direct voltage threshold values that is relied on, realized the smooth transition of the nothing electricity override mode of trailer system, avoid the rush of current that power system restoration brought, improved propulsive efficiency.

The utility model solves its technical problem and takes following technical scheme to realize:

A kind of inversion control device of trolley locomotive, comprise pantograph, inverter driving circuit and inverter bridge, asynchronous machine, pantograph is connected with the stringing electrical network, inverter driving circuit and inverter bridge are connected with asynchronous machine, pantograph is connected with the input that takes off the bow hardware detecting circuit, the output that takes off the bow hardware detecting circuit is connected with the input of DSP control module, and the output of DSP control module is connected with inverter driving circuit and inverter bridge.

And, the described bow hardware detecting circuit structure of taking off is: sampling high-tension resistive one end is connected with pantograph, the other end and the light-emitting diodes tube anode that is linked into photoelectrical coupler inside after voltage stabilizing circuit is connected, the light-emitting diodes tube cathode is connected to the negative pole of inverse control system, while reverse parallel connection one voltage-stabiliser tube on light-emitting diode, the output of photoelectrical coupler connects and composes and is connected on the input port of DSP control module by pull-up resistor, current-limiting resistance, catching diode and filter capacitor.

And described voltage stabilizing circuit is made of the voltage-stabiliser tube series connection of three grades of 110V, and the voltage-stabiliser tube of reverse parallel connection is the voltage-stabiliser tube of 16V on light-emitting diode.

And described photoelectrical coupler adopts the TLP521 chip.

And described DSP control module adopts the TMS320LF2407A chip.

And described inverter driving circuit and inverter bridge are divided into drive circuit and inverter bridge two-stage, and this drive circuit adopts M57962 or 2SD315AI driver module, and this inverter bridge is made up of the IGBT module.

Advantage of the present utility model and good effect are:

1. this inverse control system adopts and takes off the control mode that bow detection hardware circuit combines with the control of DSP control module, directly taking off the bow hardware detection in the front end employing does not enter and exit criteria as there being the electricity leap, the DSP control module is analyzed according to the output signal of taking off the bow hardware detecting circuit, can enter synchronously or withdraw from and not have electricity leap mode of operation, broken away from and do not had the mutual restriction relation that electric override mode entered and withdrawed from the direct voltage threshold values that is relied on, the start-up time of not having the electricity leap on the one hand is shorter, the leap of nothing electricity can be kept voltage on the other hand and adjust to arbitrary value, even surpass rated voltage, thereby avoided the rush of current that power system restoration brought.

2. this inverse control system is provided with adjustable retention time as detecting anti-shake holding time in DSP control module inside, carry out anti-shake processing by the DSP control module to taking off bow hardware detection signal, avoid power network line contact shake to cause friendship to take off bow more effectively.

3. this inverse control system is adopted this inverse control system and can not crossed over and keep voltage and adjust to arbitrary value there being electricity, implementing not have electricity according to nominal supply voltages crosses over, can adapt to job sites such as Coal Mine of Different Conditions, iron ore, subway, tunnel, have the extensive characteristics of accommodation.

4. the utility model adopts and to take off the bow hardware detecting circuit and control with the DSP control module and combine, and utilize load inertia and the anti-electricity generating principle of motor, make inversion system enter hot standby mode, broken away from and do not had the mutual restriction relation that electric override mode entered and withdrawed from the direct voltage threshold values that is relied on, realized the smooth transition of the nothing electricity override mode of trailer system, improved propulsive efficiency, avoided the rush of current that power system restoration brought, has leap time weak point, dependable performance, the characteristics that the scope of application is extensive are very suitable for domestic stringing formula power supply traction locomotive working condition.

Description of drawings

Fig. 1 is a system of the present utility model connection diagram;

Fig. 2 takes off bow hardware detecting circuit and DSP control module connection diagram;

Fig. 3 takes off bow hardware detecting circuit detection signal sequential chart;

Fig. 4 is that bow detection procedure schematic diagram is taken off in DSP control module inside.

Embodiment

Below in conjunction with accompanying drawing the utility model embodiment is further described.

A kind of inversion control device of trolley locomotive, as shown in Figure 1, by pantograph, take off bow hardware detecting circuit, DSP control module, inverter driving circuit and inverter bridge and asynchronous machine connects and composes successively, pantograph is connected with the stringing electrical network and obtains line voltage from the stringing electrical network, take off the bow hardware detecting circuit and be used for the line voltage of detection of grid and detection signal is exported to the DSP control module, the control program that preset DSP control module inside is handled the work of output control signal in back to inverter driving circuit and inverter bridge control asynchronous machine.In the present embodiment, the DSP control module adopts the TMS320LF2407A chip.

Take off the bow hardware detecting circuit concrete structure as shown in Figure 2; the input side that takes off the bow hardware detecting circuit obtains line voltage by sampling high-tension resistive R1 from the stringing electrical network; voltage-stabiliser tube D1 through three grades of 110V; D2; behind the voltage stabilizing circuit that the D3 series connection constitutes; be linked into the anode of photoelectrical coupler OP1 interior light emitting diodes; the light-emitting diodes tube cathode is received the negative pole of inverse control system; the voltage-stabiliser tube D4 of while 16V of reverse parallel connection on this light-emitting diode; to protect light-emitting diode not by over-voltage breakdown; the testing circuit outlet side is by pull-up resistor R2; current-limiting resistance R3; catching diode D5 and filter capacitor C1 form and are connected on the input port of DSP control module; the output control signal was to inverter driving circuit and inverter bridge after the control program that the DSP control module presets through inside was handled; inverter driving circuit and inverter bridge are divided into drive circuit and inverter bridge two-stage; this drive circuit adopts M57962 or 2SD315AI driver module, and this inverter bridge is made up of the IGBT module.The control procedure of DSP control module is: when the stringing electrical network just often, DSP control module output control signal adopts speed closed loop control; Take off bow during signal when detecting, DSP control module output control signal switches to the DC bus-bar voltage closed-loop control; When system bent again, DSP control module output control signal was switched and is got back to speed closed loop control, and this control mode guarantees speed smooth transition and the good dynamic response thereof in the control model handoff procedure.

The operation principle of taking off the bow hardware detecting circuit is: when powered on by system, and the lumination of light emitting diode of photoelectrical coupler inside, the triode C of photoelectrical coupler inside, the conducting of the E utmost point, the current collection machine is a low level through the signal that current-limiting resistance R3 outputs to the DSP control module; When bow took off in system, the light-emitting diode of photoelectrical coupler inside stopped luminous, and triode C, the E of photoelectrical coupler inside disconnects extremely synchronously, and the current collection machine is a high level through the signal that current-limiting resistance R3 outputs to the DSP control module; When system bent again, the collector electrode of the triode of photoelectrical coupler inside was a high level through the signal that current-limiting resistance R3 outputs to the DSP control module.This hardware detection signal sequence is shown in Fig. 3 waveform; as can be seen from the figure; not having electric override mode is to start synchronously; and keep voltage and can be set in the above arbitrary value of under-voltage protection value; especially can surpass normal net pressure scope (the nothing electricity that the representative of P95 parameter and dash area can be set arbitrarily among Fig. 3 is crossed over the target DC bus-bar voltage); the system that makes is avoiding causing the excessive situation of moment DC charging electric current because of big pressure reduction under the bow situation again; when system after the t2 time point bends again; this programme finishes not have electricity and crosses at t3 (t4) time point place; the shake of delay during this period of time when effectively filtration system is bent again, its anti-shake control are to realize by the control program that preset DSP control module inside.

The control program flow process that presets in the DSP control module as shown in Figure 4, this control program is an interrupt routine, in this interrupt routine, detection is taken off the bow signal and is had or not, if any taking off the bow signal, put and take off the bow flag bit, enter VDC (DC bus-bar voltage) PI and regulate, and cooperate moment amplitude limit function that working state of system is seamlessly transitted; If do not take off the bow signal, judge whether to enter the anti-shake process of multiple bow, if keep not having electricity and cross over mode of operation; If not, remove and take off the bow sign, switch to conventional traction mode of operation.

Because the bow hardware detecting circuit of taking off of the present utility model makes the mode of operation of inverse control system and electric network state synchronous, compare with conventional art, improved the response speed of system, avoided DC bus-bar voltage to fall, reduced when system bends again rush of current main circuit.

It is emphasized that; embodiment described in the utility model is illustrative; rather than it is determinate; therefore the utility model is not limited to the embodiment described in the embodiment; every by those skilled in the art according to other execution modes that the technical solution of the utility model draws, belong to the scope of the utility model protection equally.

Claims

1. the inversion control device of a trolley locomotive, comprise pantograph, inverter driving circuit and inverter bridge, asynchronous machine, pantograph is connected with the stringing electrical network, inverter driving circuit and inverter bridge are connected with asynchronous machine, it is characterized in that: pantograph is connected with the input that takes off the bow hardware detecting circuit, the output that takes off the bow hardware detecting circuit is connected with the input of DSP control module, and the output of DSP control module is connected with inverter driving circuit and inverter bridge.

2. the inversion control device of trolley locomotive according to claim 1, it is characterized in that: the described bow hardware detecting circuit structure of taking off is: sampling high-tension resistive one end is connected with pantograph, the other end and the light-emitting diodes tube anode that is linked into photoelectrical coupler inside after voltage stabilizing circuit is connected, the light-emitting diodes tube cathode is connected to the negative pole of inverse control system, while reverse parallel connection one voltage-stabiliser tube on light-emitting diode, the output of photoelectrical coupler is by pull-up resistor, current-limiting resistance, catching diode and filter capacitor connect and compose and are connected on the input port of DSP control module.

3. the inversion control device of trolley locomotive according to claim 2 is characterized in that: described voltage stabilizing circuit is made of the voltage-stabiliser tube series connection of three grades of 110V, and the voltage-stabiliser tube of reverse parallel connection is the voltage-stabiliser tube of 16V on light-emitting diode.

4. the inversion control device of trolley locomotive according to claim 2 is characterized in that: described photoelectrical coupler employing TLP521 chip.

5. the inversion control device of trolley locomotive according to claim 1 is characterized in that: described DSP control module employing TMS320LF2407A chip.

6. the inversion control device of trolley locomotive according to claim 1, it is characterized in that: described inverter driving circuit and inverter bridge are divided into drive circuit and inverter bridge two-stage, this drive circuit adopts M57962 or 2SD315AI driver module, and this inverter bridge is made up of the IGBT module.