WO2023074445A1 - ダンプトラックのドライブシステム - Google Patents
ダンプトラックのドライブシステム Download PDFInfo
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- WO2023074445A1 WO2023074445A1 PCT/JP2022/038621 JP2022038621W WO2023074445A1 WO 2023074445 A1 WO2023074445 A1 WO 2023074445A1 JP 2022038621 W JP2022038621 W JP 2022038621W WO 2023074445 A1 WO2023074445 A1 WO 2023074445A1
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- 238000004804 winding Methods 0.000 claims abstract description 96
- 230000006698 induction Effects 0.000 claims abstract description 46
- 230000005284 excitation Effects 0.000 description 21
- 238000010586 diagram Methods 0.000 description 9
- 230000001172 regenerating effect Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000037396 body weight Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/06—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving electric generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/04—Control effected upon non-electric prime mover and dependent upon electric output value of the generator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
Definitions
- the present invention relates to a drive system with a two-winding induction generator having a primary winding including a main winding and an auxiliary winding.
- a drive system that is efficient and capable of suppressing maintenance costs.
- One such drive system is an electric drive system. While the mechanical drive system transmits the power of the engine to the tires via a torque converter and transmission, the electric drive system uses the engine to drive a generator, which uses the generated power to drive the tire shafts. It drives the connected travel motor.
- Patent Document 1 As a prior art document disclosing such an electric drive system, there is Patent Document 1, for example.
- the electric drive system described in Patent Document 1 includes a main generator and an auxiliary generator driven by the engine, a high voltage rectifier circuit that converts the three-phase AC power generated by the main generator into DC power, and a high voltage rectifier circuit. Equipped with an inverter that converts the output DC power into three-phase AC power and outputs it to the traction motor, and a low-voltage rectifier circuit that converts the three-phase AC power generated by the auxiliary generator into DC power and outputs it to the auxiliary equipment. ing.
- the drive system described in Patent Document 1 includes a main generator that generates electric power used for traveling and an auxiliary generator that generates electric power used for driving auxiliary equipment.
- These generators are not particularly limited in type, but for example, if a field winding type generator in which the field winding is provided in the rotor, it is necessary to convert the generated power to direct current
- the converter can be an inexpensive rectifier.
- brushes are also required to supply the field current to the rotor, which increases the overall size and cost of the generator. It will happen.
- the winding of the main generator and the winding of the auxiliary generator are integrated (two-winding type) to eliminate the need for brushes. It is conceivable to use a two-winding induction generator of the induction type. When using a two-winding induction generator, it is necessary to newly provide a converter for voltage control.
- the dump truck is a large vehicle with a body weight of several hundred tons, and the driving motor for driving the dump truck has a capacity of several thousand kW. Therefore, there is a possibility that the current capacity (converter capacity) of the converter increases and the cost increases.
- the present invention has been made in view of the above problems, and its object is to provide a drive system for a dump truck that is capable of reducing the capacity of a converter that excites a two-winding induction generator and controlling the output according to the capacity of the converter. to provide.
- the present invention provides an induction generator having a primary winding including a main winding and an auxiliary winding, a rectifier for converting an AC voltage generated in the main winding into a DC voltage, a main machine side load connected to the rectifier; and a converter connected to the auxiliary winding to excite the secondary winding of the induction generator and convert AC voltage generated in the auxiliary winding to DC voltage.
- a drive system for a dump truck comprising an auxiliary load connected to the converter, and a control device for controlling the converter, wherein the control device controls the auxiliary load according to the power demand of the auxiliary load.
- the DC voltage of the side load is controlled, and the DC voltage of the main side load is controlled according to the required electric power of the main side load and the converter capacity, which is the current capacity of the converter.
- the capacity of the converter can be reduced by connecting the converter that excites the secondary winding of the induction generator to the auxiliary winding. Further, by controlling the DC voltage of the accessory load based on the required electric power of the accessory load, it is possible to output the required electric power of the accessory load. Furthermore, by controlling the DC voltage of the load on the main side based on the required electric power of the load on the main side and the converter capacity, which is the current capacity of the converter, the DC voltage on the load on the main side is controlled within a range not exceeding the converter capacity. becomes possible.
- the present invention in a dump truck drive system equipped with a two-winding induction generator, it is possible to reduce the capacity of the converter that excites the two-winding induction generator and to control the output according to the converter capacity.
- FIG. 1 is a diagram showing the configuration of a drive system in the prior art
- FIG. 1 is a diagram showing the configuration of a drive system according to a first embodiment of the invention
- FIG. 4 is a diagram showing the relationship between the engine speed and the voltages of the main machine-side DC bus and the auxiliary machine-side DC bus
- FIG. 4 is a block diagram showing a portion of the processing of the control device that is related to the control of the excitation converter
- 4 is a block diagram showing processing of a current command determination unit
- FIG. FIG. 2 is a diagram showing the configuration of a drive system according to a second embodiment of the invention
- Dump trucks for mines repeat a series of work cycles of loading earth and sand at a loading site, traveling from the loading site to a dumping site, discharging soil at the dumping site, and traveling from the dumping site to the loading site.
- Fig. 1 shows the configuration of a dump truck for mining.
- the dump truck for mining includes an engine 1 which is a power source of a generator 20 (shown in FIG. 3), a loading platform 7 mounted on the upper rear side of the vehicle body so as to be rotatable in the vertical direction, and an upper front side. and a driver's seat 6.
- a pair of left and right driven wheels 4L, 4R are arranged on the lower front side of the vehicle body, and a pair of left and right driving wheels 5L, 5R are arranged on the lower rear side of the vehicle body.
- the drive wheels 5L, 5R are driven by the travel motor 3 to which electric power is supplied from the generator 20.
- FIG. 1 shows the configuration of a dump truck for mining.
- the dump truck for mining includes an engine 1 which is a power source of a generator 20 (shown in FIG. 3), a loading platform 7 mounted on the upper rear side of the vehicle body so as to be rotatable in the vertical direction, and an upper front side. and a
- the drive system 100X includes a main generator (MG) 2 and a sub generator (SG) 14 driven by an engine 1, and a travel motor 3 that drives drive wheels 5L and 5R. , an auxiliary machine motor 13, a running inverter 9 which is a main machine side load, an auxiliary machine inverter 12 which is a main machine side load, a rectifier 8, an auxiliary rectifier 11, a discharge resistor 15, and a main generator 2 and a control device 30X that controls the auxiliary generator 14 .
- MG main generator
- SG sub generator
- the main generator 2 and the auxiliary generator 14 convert the rotational energy of the engine 1 into electrical energy (AC power).
- the rectifier 8 rectifies the AC power supplied from the main generator 2 into DC power, and supplies the DC power to the inverter 9 for running.
- the traction inverter 9 converts the DC power supplied from the rectifier 8 into AC power, and supplies the AC power to the traction motor 3 .
- the auxiliary generator 14 is used as a power source for an auxiliary system that drives auxiliary equipment such as cooling equipment.
- the auxiliary rectifier 11 rectifies the AC power supplied from the auxiliary generator 14 into DC power, and supplies the DC power to the inverter for auxiliary equipment 12 .
- the accessory inverter 12 converts the DC power supplied from the auxiliary rectifier 11 into AC power, and supplies the AC power to the accessory motor 13 .
- the accessory motor 13 drives a cooling device (not shown) such as a blower.
- a cooling device not shown
- FIG. 2 only one set of the auxiliary inverter 12 and the auxiliary motor 13 is shown as the auxiliary equipment system. , a plurality of accessory inverters and accessory motors having different capacities are mounted.
- the regenerative power generated when braking the traction motor 3 is collected (charged) in the secondary battery, and is used when a large amount of power is required momentarily, such as during acceleration. discharged to
- a secondary battery such as an electric vehicle
- the discharge resistor 15 regenerative electric power generated from the traction motor 3 generated during braking is consumed, thereby suppressing overvoltage in the DC bus section on the traction motor side (main engine side). It is possible to obtain an electric braking force from the traveling motor 3 while driving.
- the drive system 100X described above is basically a diesel-electric drive system, and unlike a mechanical dump truck, it does not directly drive the tires through a torque converter or transmission using the rotational power of the engine.
- the rotary drive is used for power generation of the generator.
- the drive system 100X includes a main power generator 2 that generates electric power used for traveling and an auxiliary power generator 14 that generates electric power used for driving the auxiliary equipment.
- these generators are not particularly limited in type, for example, if a field winding type generator in which a field winding is provided in the rotor is used, the generated power is converted to direct current as shown in FIG.
- An inexpensive rectifier can be used as the converter required when a field winding type generator is used, the main generator 2 and the auxiliary generator 14 are configured separately, and brushes for supplying field current to the rotor are also required. The size of the entire aircraft is increased, and the cost is also increased.
- the winding of the main generator 2 and the winding of the auxiliary generator 14 are integrated (two-winding type), and the brush It is conceivable to use an induction type two-winding induction generator that does not require a .
- Fig. 3 shows the configuration of the drive system in this embodiment.
- the drive system 100 includes a two-winding induction generator (IG: Induced Generator) 20, a running inverter 9, an auxiliary inverter 12, a rectifier 8, an excitation converter 21, and a discharge resistor 15. , and a control device 30 that controls the excitation converter 21 , the running inverter 9 , and the accessory inverter 12 in an integrated manner.
- IG Induced Generator
- the AC side of the rectifier 8 is connected to the main winding of the two-winding induction generator 20 , and the DC side is connected to the running inverter 9 and the discharge resistor 15 via the main machine side DC bus 16 .
- the rectifier 8 rectifies the AC power generated in the main winding into DC power and supplies the DC power to the main machine side DC bus 16 .
- the drive inverter 9 is connected to the drive motor 3 , converts the DC power of the main machine side DC bus 16 into AC power, and supplies the AC power to the drive motor 3 .
- the discharge resistor 15 is energized when the traveling motor 3 is in regenerative operation (retarding), and consumes electric power (regenerative electric power) generated by the regenerative operation of the traveling motor 3 .
- the excitation converter 21 has an AC side connected to the auxiliary winding of the two-winding induction generator 20 and a DC side connected to the accessory inverter 12 via the accessory side DC bus 17 .
- the excitation converter 21 converts AC power generated in the auxiliary winding into DC power, and supplies the DC power to the auxiliary equipment side DC bus 17 .
- the accessory inverter 12 is connected to the accessory motor 13 , converts the DC power of the accessory side DC bus 17 into AC power, and supplies the AC power to the accessory motor 13 . Since the drive inverter 9 and the auxiliary inverter 12 are both voltage type inverters, the voltage of the DC bus, which is the input side of each inverter, is set to a voltage that can stably supply power to the main and auxiliary equipment sides. control is required. Therefore, it is necessary to stably control the voltages on the main winding side and the auxiliary winding side by the excitation converter 21 .
- the main winding of the two-winding induction generator 20 is connected to the driving inverter 9 only through the rectifier 8 without connecting a battery or a large-capacity capacitor, or is connected to the power system. Since the output of the main winding of the two-winding induction generator 20 is not required to be constant voltage. Also, the voltages of the main and auxiliary windings of the two-winding induction generator 20 are approximately proportional. Therefore, by exciting the auxiliary winding with the excitation converter 21 connected to the auxiliary winding, the voltages of both the auxiliary winding and the main winding can be changed.
- FIG. 4 is a diagram showing the relationship between the engine speed and the voltages of the DC bus 16 on the main machine side and the DC bus 17 on the auxiliary machine side.
- the horizontal axis indicates the engine speed
- the vertical axis indicates the main machine side DC bus voltage and the auxiliary machine side DC bus voltage.
- the accessory-side DC bus voltage is constant at Vmin from the engine speed (Nmin) during idling to the maximum engine speed (Nmax).
- the main engine side DC bus voltage becomes the minimum voltage (>Vmin) during idling, and increases as the electric power required for driving the vehicle increases (increases in the engine speed).
- the main engine side DC bus voltage reaches near the maximum voltage Vmax.
- the main engine side DC bus voltage varies within this voltage range. It should be noted that the voltage characteristics of the main engine side DC bus 16 are not limited to those shown in FIG. It should be noted that the accessory-side DC bus voltage is desirably controlled to be substantially constant, since the accessory device consumes substantially constant power.
- the control device 30 controls the two-winding induction generator 20 through the excitation converter 21 so that the main side output (load) and the auxiliary side output (load) of the two-winding induction generator 20 are balanced in such vehicle operation and voltage range. It controls the current of the wound induction generator 20 .
- FIG. 5 is a block diagram showing a part related to control of the excitation converter 21 in the processing of the control device 30.
- the control device 30 has a voltage deviation calculation section 31 , a voltage control section 32 , a current command determination section 33 and a current control section 34 .
- the control device 30 is composed of a controller having an arithmetic processing function, an input/output interface for inputting/outputting signals with external devices, and the like. come true.
- the voltage deviation calculation unit 31 calculates the difference (voltage deviation) between the accessory-side DC voltage command value preset in the control device 30 and the accessory-side DC voltage, and outputs it to the voltage control unit 32 .
- the voltage control unit 32 calculates an accessory-side current command (q-axis current command value) based on the difference (voltage deviation) between the accessory-side DC voltage command value and the accessory-side DC voltage, and the current command determination unit 33 and output to the current control unit 34 .
- the specific calculation contents of the voltage control unit 32 are not particularly related to the present invention, and for example, a commonly used proportional integral calculation may be performed.
- the auxiliary equipment side current command output from the voltage control unit 32 is the q-axis equivalent current command for the two-winding induction generator 20 because the excitation converter 21 connected to the auxiliary winding directly This is because, since it is connected to the side load, the voltage of the accessory side DC bus 17, which fluctuates depending on the size of the accessory side load, must be compensated for by the effective power of the auxiliary winding.
- the current command determination unit 33 determines a supplementary current command for the two-winding induction generator 20 based on the converter capacity (current capacity), the main machine side DC voltage, the main machine side required electric power, and the auxiliary machine side current command (q-axis current command value).
- a machine-side current command (d-axis current command value) is calculated and output to the current control unit 34 .
- the auxiliary device side current command output from the current command determination unit 33 is set to the current command corresponding to the d-axis because the excitation converter 21 connected to the auxiliary winding can control the voltage of the winding. This is for adjusting the magnetic flux.
- Current control unit 34 calculates the input voltage of excitation converter 21 based on the accessory-side current command (d-axis current command value and q-axis current command value), and sends a control signal corresponding to the input voltage to excitation converter 21. Output.
- the calculation contents of the current control unit 34 are not particularly related to the present invention, and for example, a commonly used proportional integral calculation may be performed.
- FIG. 6 is a block diagram showing the processing of the current command determining section 33.
- the current command determining section 33 has a target DC voltage determining section 33a, a target field current determining section 33b, a generator current computing section 33c, and a current limiting section 33d.
- the target DC voltage determination unit 33a determines a target value (target DC voltage) of the main unit side DC voltage according to the required electric power of the main unit side load 9, and outputs it to the target field current determination unit 33b and the generator current calculation unit 33c. do.
- the target DC voltage is not necessarily equal to the DC voltage corresponding to the required electric power of the main engine side load 9, and is set within a range that the driving inverter 9 can output. If the DC voltage on the main engine side becomes extremely low, the current flowing through the traction inverter 9 will become excessive, and there is a possibility that the loss will increase accordingly. to adjust.
- the characteristics of the two-winding induction generator 20 and the traction motor 3 are taken into consideration in advance, and the target DC voltage corresponding to the required electric power of the traction motor 3 is determined by the target DC voltage determining section 33a.
- the result obtained by calculation in advance may be converted into table data and searched in the table, or the target DC voltage may be obtained by solving an actual characteristic equation.
- the target field current determination unit 33b determines the target field current (Idtgt) according to the target DC voltage, and outputs it to the generator current calculation unit 33c.
- the result obtained by calculation in advance may be converted into table data and searched in the table, or the target field current may be obtained by solving an actual characteristic equation.
- the generator current calculator 33c calculates the current magnitude (I1) of the two-winding induction generator 20 based on the q-axis current command value (Iqref) and the target field current (Idtgt).
- the current magnitude (I1) of the two-winding induction generator 20 is calculated by the following equation (1).
- the generator current calculation unit 33c appropriately increases or decreases the target field current (Idtgt) so that the main machine side DC voltage reaches the target Adjustments are made to approximate the DC voltage value.
- the current limiter 33d limits the current magnitude of the two-winding induction generator 20 according to equation (1).
- the target field current (Idtgt) is limited so that the value (I1) is equal to or less than the converter capacity (current capacity), and the target field current (Idtgt) after limitation is determined as the d-axis current command value (Idref).
- the excitation current connected to the auxiliary winding of the two-winding induction generator 20 is It becomes possible to control the DC voltage of the main side load 9 within a range not exceeding the capacity of the converter 21 .
- an induction generator 20 having a primary winding including a main winding and an auxiliary winding, a rectifier 8 for converting AC voltage generated in the main winding into a DC voltage, and a a main machine side load 9 connected to the auxiliary winding, a converter 21 that excites the secondary winding of the induction generator 20 and converts the AC voltage generated in the auxiliary winding into a DC voltage, and the converter 21
- a dump truck drive system 100 that includes an auxiliary load 12 connected to the auxiliary load 12 and a controller 30 that controls a converter 21
- the controller 30 controls the auxiliary load 12 according to the power demand of the auxiliary load 12 .
- the DC voltage of the load 12 is controlled, and the DC voltage of the main side load 9 is controlled according to the required electric power of the main side load 9 and the converter capacity, which is the current capacity of the converter 21 .
- the capacity of the converter 21 can be reduced. Further, by controlling the DC voltage of the accessory load 12 based on the required power of the accessory load 12, the required power of the accessory load 12 can be output. Furthermore, by controlling the DC voltage of the main machine side load 9 based on the required electric power of the main machine side load 9 and the converter capacity, which is the current capacity of the converter 21, the DC voltage of the main machine side load 9 is controlled within a range not exceeding the converter capacity. can be controlled.
- control device 30 in the present embodiment calculates the q-axis current command value (Iqref) of the induction generator 20 based on the deviation between the DC voltage value of the auxiliary machine side load 12 and the DC voltage command value, A d-axis current command value (Idref) for the induction generator 20 is calculated based on the required power of the load 9, the DC voltage, and the converter capacity, and the d-axis current command value (Idref) and the q-axis current command value (Iqref) are calculated. to the converter 21.
- Idref d-axis current command value
- Iqref q-axis current command value
- the DC voltage of the main side load 9 in this embodiment is higher than the DC voltage of the auxiliary side load 12 .
- the capacity of the converter 21 that excites the two-winding induction generator can be reduced and the capacity of the converter can be reduced.
- Output control becomes possible. By performing output control according to the converter capacity, it is possible to suppress energy loss and heat damage.
- the second embodiment of the present invention will be described with a focus on the differences from the first embodiment.
- power is supplied to the main side load 9 and the auxiliary side load 12 only by the excitation converter 21 connected to the auxiliary winding of the two-winding induction generator 20. . Therefore, if the excitation converter 21 breaks down, it becomes difficult to control the voltage on the main engine side, which may hinder the operation of the vehicle.
- This embodiment enables degenerate operation when the excitation converter fails.
- FIG. 7 shows the configuration of the drive system in this embodiment.
- the difference from the first embodiment is that the excitation converter 21 is composed of two converters 21a and 21b. Note that the number of converters is not limited to two.
- the control device 30 in this embodiment measures the output currents of the plurality of converters 21a and 21b with the sensors 22a and 22b. Then, the converter that no longer outputs current is determined to be faulty, and the gate of the converter is turned off. At this time, the current limiter 33d (shown in FIG. 6) updates the converter capacity with a value obtained by summing only the capacities of normal converters, and recalculates the d-axis current command value (Idref).
- the converter capacity will be 1/2 of that before the failure.
- the upper limit of the current magnitude (I1) of the two-winding induction generator 20 shown in Equation (1) is halved.
- the d-axis current command value (Idref) is also limited accordingly.
- the control device 30 calculates the required electric power of the driving inverter 9 according to the DC bus voltage of the main engine side load 9 realized by the newly limited d-axis current command value (Idref), A control signal is output to inverter 9 for running.
- the DC voltage of the main machine side load 9 realized by the newly limited d-axis current command value (Idref) becomes a correspondingly low voltage, so the power supplied to the main machine side load 9 is lower than that in normal times. become smaller.
- Idref d-axis current command value
- control device 30 in this embodiment controls the d-axis current command value (Idref ).
- the converter 21 in this embodiment includes a plurality of converters 21a and 21b
- the control device 30 has sensors 22a and 22b for detecting DC currents output from the plurality of converters 21a and 21b, respectively.
- the total capacity of the plurality of converters 21a and 21b is calculated as the converter capacity
- the DC current is output from a specific converter included in the plurality of converters 21a and 21b. is no longer output, the converter capacity is calculated as the total capacity of the converters 21a and 21b excluding the specific converter.
- the present invention is not limited to the above-described embodiments, and includes various modifications.
- the above-described embodiments have been described in detail to facilitate understanding of the present invention, and the present invention is not necessarily limited to those having all the described configurations. It is also possible to add part of the configuration of another embodiment to the configuration of one embodiment, or to delete part of the configuration of one embodiment or replace it with part of another embodiment. It is possible.
- Traveling inverter main machine side load
- 11 Auxiliary rectifier
- 12 Auxiliary inverter (auxiliary side load)
- 13 Auxiliary motor
- Auxiliary generator 15 Discharge resistor
- Main side DC bus 17 Auxiliary Machine-side DC bus
- 2-winding induction generator 21 excitation converter 21a, 21b converter 22a, 22b sensor 30, 30X control device
- 31 voltage deviation calculation unit
- 32 voltage control unit
- 33b target field current determination unit 33c generator current calculation unit 34 current control unit 100, 100X drive system.
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- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
Description
本実施例では、主巻線と補助巻線とを含む一次巻線を有する誘導発電機20と、前記主巻線に生じた交流電圧を直流電圧に変換する整流器8と、整流器8に接続された主機側負荷9と、前記補助巻線に接続され、誘導発電機20の二次巻線を励磁するとともに、前記補助巻線に生じた交流電圧を直流電圧に変換するコンバータ21と、コンバータ21に接続された補機側負荷12と、コンバータ21を制御する制御装置30とを備えたダンプトラックのドライブシステム100において、制御装置30は、補機側負荷12の要求電力に応じて補機側負荷12の直流電圧を制御し、主機側負荷9の要求電力とコンバータ21の電流容量であるコンバータ容量とに応じて主機側負荷9の直流電圧を制御する。
本実施例における制御装置30は、コンバータ容量が変更された場合に、主機側負荷9の要求電力と主機側負荷9の直流電圧と変更後のコンバータ容量とに基づいてd軸電流指令値(Idref)を変更する。
Claims (5)
- 主巻線と補助巻線とを含む一次巻線を有する誘導発電機と、
前記主巻線に生じた交流電圧を直流電圧に変換する整流器と、
前記整流器に接続された主機側負荷と、
前記補助巻線に接続され、前記誘導発電機の二次巻線を励磁するとともに、前記補助巻線に生じた交流電圧を直流電圧に変換するコンバータと、
前記コンバータに接続された補機側負荷と、
前記コンバータを制御する制御装置とを備えたダンプトラックのドライブシステムにおいて、
前記制御装置は、前記補機側負荷の要求電力に応じて前記補機側負荷の直流電圧を制御し、前記主機側負荷の要求電力と前記コンバータの電流容量であるコンバータ容量とに応じて前記主機側負荷の直流電圧を制御する
ことを特徴とするダンプトラックのドライブシステム。 - 請求項1に記載のダンプトラックのドライブシステムにおいて、
前記制御装置は、
前記補機側負荷の直流電圧値と直流電圧指令値との偏差に基づいて前記誘導発電機のq軸電流指令値を算出し、
前記主機側負荷の要求電力と直流電圧と前記コンバータ容量とに基づいて前記誘導発電機のd軸電流指令値を算出し、
前記d軸電流指令値と前記q軸電流指令値とに応じた制御信号を前記コンバータへ出力する
ことを特徴とするダンプトラックのドライブシステム。 - 請求項2に記載のダンプトラックのドライブシステムにおいて、
前記制御装置は、前記コンバータ容量が変更された場合に、前記主機側負荷の要求電力と前記主機側負荷の直流電圧と変更後の前記コンバータ容量とに基づいてd軸電流指令値を算出する
ことを特徴とするダンプトラックのドライブシステム。 - 請求項1に記載のダンプトラックのドライブシステムにおいて、
前記コンバータは、複数のコンバータで構成され、
前記制御装置は、
前記複数のコンバータのそれぞれから出力される直流電流を検出するセンサを有し、
前記複数のコンバータのそれぞれから直流電流が出力されている場合は、前記複数のコンバータの合計容量を前記コンバータ容量として算出し、
前記複数のコンバータに含まれる特定のコンバータから直流電流が出力されなくなった場合は、前記複数のコンバータから前記特定のコンバータを除いたコンバータの合計容量を前記コンバータ容量として算出する
ことを特徴とするダンプトラックのドライブシステム。 - 請求項1に記載のダンプトラックのドライブシステムにおいて、
前記主機側負荷の直流電圧は、前記補機側負荷の直流電圧より高い
ことを特徴とするダンプトラックのドライブシステム。
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JP2021048671A (ja) | 2019-09-17 | 2021-03-25 | 日立建機株式会社 | ダンプトラック |
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