CN101783641B - Energy-saving control system of travelling gantry crane - Google Patents

Abstract

The invention discloses an energy-saving control system of a travelling gantry crane, comprising a full-variable-speed diesel-driven generator, a controller, a converter and an inverter, wherein AC power supply output by the full-variable-speed diesel-driven generator is rectified into stable DC voltage by the converter and then is output into a DC bus, and the DC voltage is provided for an inversion unit to be inverted for generating AC voltage needed by electricity loads in the travelling gantry crane and supplying power for the electricity loads; the converter is internally provided with a detection control system which is used for detecting the amperage output by the converter and feeding back the amperage into the controller, so that the rotating speed corresponding to the amperage can be generated, and the rotating speed of the full-variable-speed diesel-driven generator can be further controlled; the controller can calculate the rotating speed according to the formula: y=bx+a, wherein x is the amperage output by the converter, y is the rotating speed of the diesel-driven generator, and a and b are parameters. The energy-saving control system has simple structure, needs not to reform the diesel-driven generator, is safe and reliable in use, and leads the energy-saving effect to achieve more than 30%.

Description

The energy-saving control system of gantry traveler

Technical field

The invention belongs to the power control technology field, specifically, relate to a kind of port and pier occasion that is applied to, the control system of electric power is provided for the gantry traveler of lifting container.

Background technology

At present, be widely used in the gantry traveler (claiming tyre crane again) of port and pier, its electric power system adopts diesel generating set that working power is provided mostly.Its operation principle is: after diesel generating set starts normal operation; Output three-phase alternating current 460V power supply; Offer on the one hand tyre crane inside and comprise and be used to the line loads such as frequency converter that promote, walk, turn to, with the operations such as hoisting mechanism, cart walking mechanism, trolley travel mechanism and big vehicle steering mechanism of control tyre crane; On the other hand, will exchange the step-down of 460V power supply through transformer is the alternating current 220V power supply, is the air-conditioning on the tyre crane, the power supply of illumination even load.

In order to reach the purpose of energy-saving and emission-reduction, present tyre crane electric power system is general to adopt two kinds of designs to realize Energy Saving Control: a kind of is to adopt oil to change power technology, promptly directly adopts the energy of electric energy as gantry traveler.Its design principle is around tyre crane or a side is installed the aerial slide wire that is connected with utility grid; The slide wire power supply device is installed on aerial slide wire; The input of slide wire power supply device is contacted with aerial slide wire; Its output is connected with the current supply circuit of tyre crane through current collector, and then utilizes utility grid to supply power for tyre crane.This design has been broken away from the application to diesel generating set; Realized reducing the purpose of design of discharging, improving harbour environment; But but limited the operation area of tyre crane; Make that tyre crane can only be mobile in the fixing zone of aerial slide wire, and tyre crane and trolley may loose contact appear and cause operation troubles.Another kind of design is the full speed changing diesel generator of an employing system, through Frequency Converter Control synchronous generator rotating speed, reaches purpose of energy saving.But this electric power system also has its inherent shortcoming, promptly must transform synchronous generator, installs encoder additional, detects the rotating speed and the stator initial phase angle of synchronous generator through encoder, and then controls generator operation.And must carry out identification to generator parameter before the each enforcement of this scheme, total system is transformed complicated, thereby has influenced its use.

Summary of the invention

The present invention is directed to the tyre crane electric power system that adopts full speed changing diesel generator group design; Proposed a kind of can be according to the actual need for electricity of tyre crane load; Automatically the energy-saving control system of control diesel engine generator rotating speed adopts this control system to need not diesel engine generator is transformed, and control precision is high; Good reliability, and easy to use.

For solving the problems of the technologies described above, the present invention adopts following technical scheme to be achieved:

A kind of energy-saving control system of gantry traveler comprises full speed changing diesel generator, controller, current transformer and inverter; The AC power of said full speed changing diesel generator output is rectified into through current transformer and exports dc bus to after galvanic current is pressed, and offers inversion unit respectively to use the required alternating voltage of electric loading to be the electricity consumption electric in the inversion generation gantry traveler; In said current transformer, be provided with the detection control system, detect the magnitude of current of current transformer output and feed back to controller, and then the rotating speed of full speed changing diesel generator is controlled with the corresponding with it rotating speed amount of generation; Said controller comes the Calculation Speed amount according to formula: y=bx+a; Wherein, x is the magnitude of current of current transformer output; Y is the rotating speed amount of diesel engine generator; A, b are parameter.

Further, the concrete numerical value of said a, b parameter confirms that through the debugging test of limited number of time its deterministic process is following in the system debug stage:

At first, through each running status in the control gantry traveler, determine n magnitude of current x with electric loading _i, i=1,2 ..., n;

Secondly, according to each magnitude of current x _i, determine each magnitude of current x _iPairing desired speed amount y _i, i=1,2 ..., n;

Then, calculate $b=\frac{2[\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i{y}_i-\frac{1}{n}\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{y}_i]}{2[-\frac{1}{n}{\left(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i\right)}^2+\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i^2]}=\frac{n[\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i{y}_i-\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{y}_i]}{n\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i^2-{\left(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i\right)}^2};$

$a=\frac{\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{y}_i-b\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i}{n}.$

In order to obtain ideal curve, a described n testing site should each be chosen from beginning to start to this process of whole full speed runnings with electric loading from gantry traveler, comprises two end points of this process and (n-2) individual intermediateness point.

Further; In said inversion unit, comprise 4 inverters; Hoisting mechanism motor in the inversion output gantry traveler, cart walking mechanism motor, trolley travel mechanism motor and the big required communication power supply of vehicle steering mechanism motor are the power supply of the line load in the gantry traveler respectively.

Further again; Said inverter receives the control signal that controller sends; With the work schedule of definite inverter and the ac power frequency of inversion output; Be the control inverter operation that only when connected line load need move, powers on again, and produce corresponding with it ac power frequency, and then the control line load is according to operating personnel's requirement operation according to operating personnel's preset running speed.

In order to satisfy in the gantry traveler other except that line load with the power reguirements of electric loading; In said inversion unit, also be provided with an inverter; Be connected on the dc bus, it is the power devices such as illuminator or air-conditioning system in the gantry traveler that DC bus-bar voltage is reverse into the 220V alternating voltage.

Preferably, said controller preferably connects described current transformer and inversion unit through fieldbus, receives the magnitude of current of current transformer feedback, and to inversion unit output control signal.

In order to realize the stable output of direct voltage; In said current transformer, be provided with ac input end, reactor and controlled full bridge rectifier; Said ac input end connects full speed changing diesel generator; Receive the AC power of full speed changing diesel generator output, transfer to described controlled full bridge rectifier through the reactor of connecting; Controlled full bridge rectifier is rectified into DC power supply output with AC power, and the feedback direct voltage is to described detection control system; Said detection control system generates drive signal according to the direct voltage that receives, and exports the control end of controlled full bridge rectifier to, to proofread and correct the output voltage amplitude of controlled full bridge rectifier.

Further, the ac input end of said current transformer passes through isolating switch series connection fuse, and then is in series through fuse and described reactor; The DC power supply that said controlled full bridge rectifier generates is through isolating diode output.

Further again, be connected with transformer at the ac input end of said current transformer, through the required power supply of cooling blower in the transformer conversion output gantry traveler, be the cooling blower power supply.

Compared with prior art; Advantage of the present invention and good effect are: power-supply system of the present invention adopts two closed-loop control mechanism; Direct voltage on the one hand can the stable DC bus through detecting the load current size of gantry traveler, regulates adaptively the rotating speed of diesel engine generator on the other hand; Make the electric energy of diesel engine generator output be in all the time under the state that is complementary with the required electric energy of load running, thereby reached the purpose of design of oil-saving discharging-reducing.The trend of this technology coincidence control technical development, the flexibility of control and reliability are improved greatly.

After reading the detailed description of embodiment of the present invention in conjunction with the accompanying drawings, other characteristics of the present invention and advantage will become clearer.

Description of drawings

Fig. 1 is the overall architecture sketch map of the energy-saving control system of gantry traveler proposed by the invention;

Fig. 2 is the schematic block circuit diagram of a kind of embodiment of the internal circuit configuration of current transformer among Fig. 1.

Embodiment

Describe in detail below in conjunction with the accompanying drawing specific embodiments of the invention.

The present invention is in order to realize the purpose of design of oil-saving discharging-reducing; Electric power system to the gantry traveler of the full speed changing diesel generator group of present employing design; Proposed a kind ofly can regulate the rotating speed of diesel generating set adaptively, thereby made the electric energy of its output just can satisfy the need for electricity of load according to the actual need for electricity of load; The energy waste problem of having avoided being in full-speed state all the time after the diesel generating set operation and being caused; And this scheme need not existing generating set is transformed, and control is simple, and reliability is high.

Come to set forth in detail the concrete establishment structure and the operation principle thereof of said energy-saving control system below through a concrete embodiment.

Embodiment one, and referring to shown in Figure 1, the gantry traveler energy-saving control system of present embodiment comprises full speed changing diesel generator, controller, current transformer and inversion unit.Wherein, full speed changing diesel generator can be an existing diesel generating set in the tyre crane, and when generator was in different rotating speeds, the AC power of exporting different amplitudes and frequency was the electric in the tyre crane.After starting operation when diesel engine generator, at first be in idling mode, generally about 200 volts, frequency is about 20Hz for the AC power of output.Because output voltage is too low, thereby causes the internal load of tyre crane all to be in under-voltage condition and can't work.And when the diesel engine generator full speed running, the alternating voltage that sends can reach about 500 volts, and frequency is generally about 60Hz.At this moment, because output voltage is too high, tends to damage the air-conditioning that needs alternating current 220V power supply, illumination etc. and use electric loading, therefore, needing to introduce one overlaps no matter be in which kind of running status at generator, and the electric power system of stabilized power supply all can be provided.

Based on this, present embodiment has proposed a kind ofly can export the current transformer of stablizing the amplitude DC power supply, and is as shown in Figure 1.Said current transformer connects diesel generating set, and the AC power of diesel generating set output is rectified into the DC power supply of stablizing amplitude, outputs on the dc bus, for the internal load of tyre crane provides stable power supply.In order to obtain the required working power of each line load in the tyre crane; Present embodiment is provided with a plurality of inverters in inversion unit; Inverter is connected on the dc bus; Through inverter the DC power supply on the dc bus is reverse into the required AC power of line load work, is the line load power supply.Because in present tyre crane system; Its line load generally includes hoisting mechanism, cart walking mechanism, trolley travel mechanism and big four parts of vehicle steering mechanism; Therefore, present embodiment adopt four inverters respectively with four mechanisms in motor connect one to one, as shown in Figure 1; Inverter 1 connects the hoisting mechanism motor; When operating personnel control the hoisting mechanism operation, DC bus-bar voltage is reverse into the required communication power supply output of hoisting mechanism motor that is used to drive the lift arm up-down, be the hoisting mechanism power supply.Inverter 2 connects the cart walking mechanism motor, inverter 3 connects trolley travel mechanism motor, the big vehicle steering mechanism motor of inverter 4 connections, the required Alternating Current Power Supply of inversion each line load of output respectively.

In order to make each inverter only when connected line load need move; Just start the required AC power of outputting power load; Present embodiment is connected the control end of inverter with controller, controller generates control signal corresponding and transfers to different inverters according to operating personnel's the instruction of controlling; With the work schedule of control inverter, and then realization reduces the designing requirement of system power dissipation.Simultaneously, the speed of travel of cart, dolly also can be controlled by operating personnel, and the frequency of the AC power through control inverter inversion output is come the governor motion rotating speed of motor.

In order to reach the purpose of design of oil-saving discharging-reducing, present embodiment has designed the detection control system in said current transformer, detect through the output current of detection control system current transformer, and feedback current amount to described controller.Said controller generates corresponding with it rotating speed amount according to the magnitude of current that receives, and exports full speed changing diesel generator to controlling its rotating speed, forms outer close-loop feedback control system with this.Illustrate: when the tyre crane load is very light; During such as the equal off-duty of each line load; The load current of current transformer outlet side is very little, and controller learns that according to the magnitude of current that receives load is very little, and then the control command of generation slow-speed of revolution amount sends to diesel engine generator; Control diesel engine generator low cruise is such as being in idling mode.And when the load of tyre crane strengthens; It is big that load current on the dc bus becomes; Controller generates the corresponding rotating speeds amount according to the magnitude of current that detects the control system feedback, exports diesel engine generator to, accelerates to the rotating speed state that is complementary with load with the control generator; Thereby make the electric energy of diesel engine generator output be in the state that is complementary with the required electric energy of load all the time, reach the purpose of fuel-economizing with this.

In order to realize the accurate control of controller to the diesel engine generator rotating speed, present embodiment has proposed the corresponding relation parameter identification method based on the current transformer output current of least square method and diesel engine generator rotating speed amount, comes the control strategy in the CONTROLLER DESIGN.

If x _iBe the magnitude of current (being load capacity) of current transformer output, y _iFor diesel engine generator is x at the magnitude of current _iThe time the desired speed amount, i=1,2 ..., n; (x then _i, y _i) be the one group of data that provides under the right-angle plane coordinate system.If x ₁＜x ₂＜...＜x _n, we can organize data to this and regard a discrete function as.Our problem is to confirm straight line y=bx+a, makes the variation that reflects these group data that it can " best ".

Debugging test in the system debug stage through limited number of time such as n time, is confirmed the concrete numerical value of parameter b, a among the straight line y=bx+a.

Introduce least square method; Be minimum promptly through the derivation of equation

, the value of coming calculating parameter b, a.Order

$Q=\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{[y_i-({\mathrm{bx}}_i+a)]}^2={[y_1-({\mathrm{bx}}_1+a)]}^2+{[y_2-({\mathrm{bx}}_2+a)]}^2+...+{[y_n-({\mathrm{bx}}_n+a)]}^2$

$={\mathrm{na}}^2-2a\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{y}_i-2b\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i{y}_i+2\mathrm{ab}\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i+b^2\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i^2$

$={\mathrm{na}}^2-2(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{y}_i-b\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i)a+(b^2\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i^2-2b\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i{y}_i)---\left(1\right)$

Wherein, n magnitude of current x _i, i=1,2 ..., each confirms with the running status of electric loading n in the gantry traveler through controlling in the system debug stage; Rotating speed amount y _i, i=1,2 ..., n is that the commissioning staff is at magnitude of current x _iThe desirable diesel engine generator rotating speed of rule of thumb confirming out down; I.e. (x _i, y _i) be i testing site.In order to obtain ideal curve, a described n testing site should each be chosen from beginning to start to this process of whole full speed runnings with electric loading from tyre crane, and contains all processes, promptly comprises two end points of this process and (n-2) individual intermediateness point.

In the formula (1), regard b as parameter, Q promptly is the quadratic function of a, when

$a=\frac{\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{y}_i-b\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i}{n}=\stackrel{\‾}{y}-b\stackrel{\‾}{x}$

The time, Q just maybe be minimum; Wherein, y and x represent the arithmetic mean of the centrifugal pump of y and x respectively.A substitution (1) formula is got:

$Q=b^2[-\frac{1}{n}{\left(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i\right)}^2+\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i^2]-2b[\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i{y}_i-\frac{1}{n}\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{y}_i]-\frac{1}{n}{\left(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{y}_i\right)}^2$

The quadratic function that can Q be regarded as b requires the minimum value of function Q, has only

$b=\frac{2[\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i{y}_i-\frac{1}{n}\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{y}_i]}{2[-\frac{1}{n}{\left(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i\right)}^2+\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i^2]}=\frac{n[\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i{y}_i-\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{y}_i]}{n\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i^2-{\left(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i\right)}^2}$

Through the pre-determined n of a substitution testing site (x _i, y _i), i=1,2 ..., n promptly can draw the corresponding curve of load current amount x and diesel engine generator rotating speed amount y.Deposit this curve in controller, controller utilizes the curve that prestores can calculate required rotating speed amount y apace according to the magnitude of current x of current transformer feedback, sends instructions to diesel engine generator, makes on its rotating speed that runs to requirement, to satisfy the electricity consumption requirement of load.

In the present embodiment, described diesel engine generator, current transformer and inverter preferably adopt the PROFIBUS fieldbus to be connected communication with controller, transmission detection limit and control signal.

In the present embodiment; In order to obtain the DC bus-bar voltage of amplitude stability; Present embodiment preferably is designed to the high-frequency current transformer based on IGBT with current transformer; As shown in Figure 2, comprise major parts such as ac input end ABC, isolating switch QF1, fuse F1-F3, reactor L1-L3 and controlled full bridge rectifier BD1.Wherein, isolating switch QF1, fuse F1-F3 and reactor L1-L3 are connected between three-phase alternating current input ABC and the controlled full bridge rectifier BD1 successively.After the three-phase alternating-current supply through diesel engine generator output is linked into this current transformer, at first whether power on through isolating switch QF1 control power-supply system.Behind closed isolating switch QF1; Three-phase alternating-current supply transfers to reactor L1-L3 respectively through the insurance F1-F3 that connects on every phase power line; Through reactor L1-L3 carry out filtering with the processing of boosting after; Get into the controlled full bridge rectifier BD1 of three-phase, three-phase alternating-current supply is rectified into DC power supply, export through isolating diode D1.Said fuse F1-F3 can prevent the damage that rear end chance failure short circuit causes diesel generating set, to play the effect of protection power-supply system.

In the present embodiment; Described controlled full bridge rectifier BD1 preferably adopts the 5th generation IGBT power device to set up and forms; In order to stablize the direct voltage of its output; Between its dc power output end and control end, be connected described detection control system, as shown in Figure 2, close-loop feedback control system in forming.Said detection control system is gathered the direct voltage amplitude of controlled full bridge rectifier BD1 output; And then the generation drive signal exports the control end of controlled full bridge rectifier BD1 to; Through changing the angle of flow of IGBT power device; Realize accurate correction to its output voltage amplitude, thus make DC power supply amplitude through controlled full bridge rectifier BD1 output can all-the-time stable on the amplitude of setting, such as exporting stable 650V direct voltage; Be applied on the dc bus, be each the electricity consumption electric in the tyre crane.

In order to improve control precision, described detection control system and controller preferably adopt digital system processor DSP to carry out concrete circuit design.

In the current transformer of present embodiment; Can also after isolating switch QF1, further connect transformer T1; As shown in Figure 2, the AC power step-down of diesel engine generator being exported through transformer T1 becomes the required power supply of cooling blower in the tyre crane, is transferred in the power-supply system of cooling blower.

For equipment such as the air-conditioning that only needs the alternating current 220V power supply in the tyre crane, illuminations; Can in inversion unit, set up inverter, be connected on the dc bus, as shown in Figure 1; AC power with the stable 220V/50Hz of inversion output is power devices such as air-conditioning, illumination.

In like manner, can obtain from dc bus is stable equally for the required working power of brake unit in the tyre crane.

Tyre crane energy-saving control system of the present invention adopts two closed-loop controls theories, and utilization detects direct voltage and the load current that control system detects current transformer output, and then transfers to the self adaptation adjusting of controller realization to the diesel engine generator rotating speed.This energy-saving control system is simple in structure, need not existing diesel generating set is transformed, and is safe and reliable, and energy-saving effect can reach more than 30%.

Certainly, the above only is a kind of preferred implementation of the present invention, should be understood 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 (9)

1. the energy-saving control system of a gantry traveler is characterized in that: comprise full speed changing diesel generator, controller, current transformer and inversion unit; The AC power of said full speed changing diesel generator output is rectified into through current transformer and exports dc bus to after galvanic current is pressed, and offers inversion unit respectively to use the required alternating voltage of electric loading to be the electricity consumption electric in the inversion generation gantry traveler; In said current transformer, be provided with the detection control system, detect the magnitude of current of current transformer output and feed back to controller, and then the rotating speed of full speed changing diesel generator is controlled with the corresponding with it rotating speed amount of generation; Said controller comes the Calculation Speed amount according to formula: y=bx+a; Wherein, x is the magnitude of current of current transformer output; Y is the rotating speed amount of diesel engine generator; A, b are parameter; The concrete numerical value of said a, b parameter confirms that through the debugging test of limited number of time its deterministic process is following in the system debug stage:

At first, through each running status in the control gantry traveler, determine n magnitude of current x with electric loading _i, i=1,2 ..., n;

Secondly, according to each magnitude of current x _i, determine each magnitude of current x _iPairing desired speed amount y _i, i=1,2 ..., n;

Then, calculate $b=\frac{2[\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i{y}_i-\frac{1}{n}\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{y}_i]}{2[-\frac{1}{n}{\left(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i\right)}^2+\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i^2]}=\frac{n[\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i{y}_i-\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{y}_i]}{n\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i^2-{\left(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i\right)}^2};$

$a=\frac{\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{y}_i-b\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{x}_i}{n}.$

2. the energy-saving control system of gantry traveler according to claim 1; It is characterized in that: each is chosen from beginning to start to this process of whole full speed runnings with electric loading from gantry traveler in n testing site, comprises two end points and n-2 intermediateness point of this process.

3. the energy-saving control system of gantry traveler according to claim 1 and 2; It is characterized in that: in said inversion unit, comprise 4 inverters, respectively the hoisting mechanism motor in the inversion output gantry traveler, cart walking mechanism motor, trolley travel mechanism motor and the big required communication power supply of vehicle steering mechanism motor.

4. the energy-saving control system of gantry traveler according to claim 3 is characterized in that: said inverter receives the control signal that controller sends, with the work schedule of confirming inverter and the ac power frequency of inversion output.

5. the energy-saving control system of gantry traveler according to claim 3; It is characterized in that: in said inversion unit, also comprise an inverter; Be connected on the dc bus, it is illuminator or air-conditioning system power supply in the gantry traveler that DC bus-bar voltage is reverse into the 220V alternating voltage.

6. the energy-saving control system of gantry traveler according to claim 5 is characterized in that: said controller connects current transformer and inversion unit through fieldbus.

7. the energy-saving control system of gantry traveler according to claim 1 and 2; It is characterized in that: in said current transformer, include ac input end, reactor and controlled full bridge rectifier; Said ac input end connects full speed changing diesel generator; Receive the AC power of full speed changing diesel generator output, transfer to described controlled full bridge rectifier through the reactor of connecting; Controlled full bridge rectifier is rectified into DC power supply output with AC power, and the feedback direct voltage is to described detection control system; Said detection control system generates drive signal according to the direct voltage that receives, and exports the control end of controlled full bridge rectifier to, and the output voltage amplitude of controlled full bridge rectifier is proofreaied and correct.

8. the energy-saving control system of gantry traveler according to claim 7 is characterized in that: the ac input end of said current transformer is through isolating switch series connection fuse, and then is in series through fuse and described reactor; The DC power supply that said controlled full bridge rectifier generates is through isolating diode output.

9. the energy-saving control system of gantry traveler according to claim 7; It is characterized in that: the ac input end at said current transformer is connected with transformer; Through the required power supply of cooling blower in the transformer conversion output gantry traveler, be the cooling blower power supply.

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