CN115800770A - Water cooling system and method of traction converter, controller and traction system - Google Patents
Water cooling system and method of traction converter, controller and traction system Download PDFInfo
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- CN115800770A CN115800770A CN202211401310.5A CN202211401310A CN115800770A CN 115800770 A CN115800770 A CN 115800770A CN 202211401310 A CN202211401310 A CN 202211401310A CN 115800770 A CN115800770 A CN 115800770A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 99
- 238000001816 cooling Methods 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims description 27
- 239000000110 cooling liquid Substances 0.000 claims abstract description 40
- 230000001105 regulatory effect Effects 0.000 claims description 51
- 230000005540 biological transmission Effects 0.000 claims description 9
- 239000004519 grease Substances 0.000 claims description 6
- 229920001296 polysiloxane Polymers 0.000 claims description 6
- 230000017525 heat dissipation Effects 0.000 description 13
- 239000002826 coolant Substances 0.000 description 11
- 239000007788 liquid Substances 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000013528 artificial neural network Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002068 genetic effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
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Abstract
The invention provides a water cooling system, a water cooling method, a controller and a traction system of a traction converter, wherein the system comprises: the water pump is used for providing cooling liquid for the water cooling system; the first water-cooling radiator is arranged on the rectifying module of the traction converter, is connected with the water pump and is used for cooling the rectifying module of the traction converter by using cooling liquid provided by the water pump; the second water-cooling radiator is arranged on the inversion module of the traction converter, is connected with the water pump and is used for cooling the inversion module of the traction converter by using cooling liquid provided by the water pump; and the heat exchanger is connected with the first water-cooling radiator and the second water-cooling radiator and is used for carrying out heat exchange on cooling liquid flowing out of the first water-cooling radiator and the second water-cooling radiator. The temperature fluctuation range of the rectification module and the inversion module of the train traction converter can be effectively controlled, and the influence on the service life of the modules due to the large temperature fluctuation range is avoided.
Description
Technical Field
The invention relates to the technical field of rail trains, in particular to a water cooling system, a water cooling method, a controller and a traction system of a traction converter.
Background
Operating temperature fluctuation and temperature mean have become one of the key factors affecting the lifetime of an IGBT (Insulated Gate Bipolar Transistor) device. The IGBT devices (e.g., rectifier modules and inverter modules) have complex operating conditions and often have large power variations. The traditional water cooling mode has strong cooling capacity, and can control the running temperature of the IGBT device in a reasonable interval under a high-power working condition (such as acceleration of a train). However, when the IGBT device operates in a low-power working condition (for example, when a train decelerates), the cooling mode of the water cooling device is still strong, so that the temperature of the IGBT device drops rapidly under the working condition, and the temperature fluctuation is large when the IGBT device operates, thereby affecting the service life of the IGBT device.
Disclosure of Invention
The invention provides a water cooling system, a water cooling method, a controller and a traction system of a traction converter, which can effectively control the temperature fluctuation range of a rectification module and an inversion module of the train traction converter and avoid the influence on the service life of the modules due to a large temperature fluctuation range.
In a first aspect, an embodiment of the present invention provides a water cooling system for a traction converter, including:
the water pump is used for providing cooling liquid for the water cooling system;
the first water-cooling radiator is arranged on the rectifying module of the traction converter, is connected with the water pump and is used for cooling the rectifying module of the traction converter by using cooling liquid provided by the water pump;
the second water-cooling radiator is arranged on the inversion module of the traction converter, is connected with the water pump and is used for cooling the inversion module of the traction converter by using cooling liquid provided by the water pump;
and the heat exchanger is connected with the first water-cooled radiator and the second water-cooled radiator and is used for carrying out heat exchange on cooling liquid flowing out of the first water-cooled radiator and the second water-cooled radiator.
A fan for cooling the cooling liquid in the heat exchanger with an air flow;
at least one flow adjusting device is arranged between the output end of the water pump and the input end of the heat exchanger, and/or between the input end of the water pump and the input end of the heat exchanger, and/or between the output end of the water pump and the input end of the first water-cooling radiator or the input end of the second water-cooling radiator, and is used for adjusting the flow of cooling liquid so as to adjust the temperature of the rectifying module and the temperature of the inverter module, and the temperature is within a target fluctuation range.
In some implementations, the rectifier module includes at least one IGBT rectifier device and the inverter module includes at least one IGBT inverter device.
In some implementations, the at least one flow regulating device includes:
the first flow regulating device is arranged between the output end of the water pump and the input end of the heat exchanger and is used for regulating the total flow of the cooling liquid flowing into the first water-cooling radiator and the second water-cooling radiator;
the second flow regulating device is arranged between the input end of the water pump and the input end of the heat exchanger and is used for regulating the flow of the cooling liquid flowing into the heat exchanger;
and the third flow regulating device is arranged between the output end of the water pump and the input end of the first water-cooled radiator or the second water-cooled radiator and is used for regulating the flow of cooling liquid flowing into the first water-cooled radiator and the second water-cooled radiator.
In some implementations, the flow regulating device includes an electrically actuated valve.
In some implementations, the first water-cooled heat sink is attached to the rectifier module of the traction converter by a heat-conducting silicone grease; and the second water-cooling radiator is attached to the inversion module of the traction converter through heat-conducting silicone grease.
In some implementations, the at least one flow regulating device further includes:
and the fourth flow regulating device is arranged between the output end of the water pump and the third flow regulating device and is used for regulating the flow of the cooling liquid flowing into the first water-cooled radiator and the second water-cooled radiator.
In a second aspect, an embodiment of the present invention provides a water cooling method for a traction converter, which is implemented based on the water cooling system for the traction converter in the first aspect, and the method includes:
in the working process of the traction converter, the temperatures of a rectification module and an inversion module of the traction converter are obtained;
and adjusting at least one flow regulating device based on the acquired temperature by using a preset control mode so as to enable the temperature fluctuation of the rectifying module and/or the inverting module to be in a target range.
In some implementations, the preset control mode includes a hysteresis control mode, and the flow regulating device includes an electrically operated valve;
the adjusting at least one flow regulating device based on the acquired temperature by using a preset control mode so as to enable the temperature fluctuation of the rectifying module and/or the inverting module to be within a target range comprises:
comparing the acquired temperature with the set upper temperature limit and the lower temperature limit of hysteresis control;
when the obtained temperature is higher than the set upper limit, adjusting each electric valve to a corresponding first target opening degree so as to reduce the temperature of the rectification module and/or the inversion module; and when the acquired temperature is lower than a set lower limit, adjusting each electric valve to a corresponding second target opening degree so as to maintain the temperature of the rectifier module and/or the inverter module, so that the fluctuation of the temperature of the rectifier module and/or the inverter module is in a target range between the upper temperature limit and the lower temperature limit.
In some implementations, the first target opening and the second target opening are combinations of valve openings that minimize temperature fluctuations of the rectifier module and/or the inverter module when the temperature is above a set upper limit and the temperature is below a set lower limit, respectively.
In a third aspect, an embodiment of the present invention provides a controller, configured to implement the method according to the first aspect.
In a fourth aspect, an embodiment of the present invention provides a transmission control unit integrated with the controller according to the third aspect.
In a fifth aspect, an embodiment of the present invention provides a traction system, including:
a traction converter equipped with the water cooling system of the first aspect;
the transmission control unit of the fourth aspect.
Compared with the prior art, one or more embodiments of the invention can bring about at least the following beneficial effects:
the water cooling system can adjust the opening degree of each flow adjusting device according to different working conditions (such as high-power working conditions and low-power working conditions), the flow adjusting devices are matched, the heat dissipation capacity of the first water cooling radiator and the second water cooling radiator can be adjusted, so that the temperature of the rectifying module and the temperature of the inversion module of the traction converter can be adjusted, the temperature fluctuation of the rectifying module and the temperature fluctuation of the inversion module are kept within a target range, the optimal state is achieved, and the service life of IGBT devices of the rectifying module and the inversion module is prolonged.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope.
Fig. 1 is a schematic diagram of a water cooling system of a traction converter according to an embodiment of the present invention;
FIG. 2 is an outflow diagram of a water cooling method of a traction converter provided by the embodiment of the invention;
fig. 3 is a schematic diagram illustrating a hysteresis control method.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The present embodiment provides a water cooling system of a traction converter, as shown in fig. 1, including:
the water pump 1 is used for providing cooling liquid for the water cooling system; can be a fixed-frequency water pump or a variable-frequency water pump;
the first water-cooling radiator 2 is arranged on the rectifying module 6 of the traction converter, is connected with the water pump 1 and is used for cooling the rectifying module 6 of the traction converter by using cooling liquid provided by the water pump 1;
the second water-cooling radiator 3 is arranged on the inversion module 7 of the traction converter, is connected with the water pump 1 and is used for cooling the inversion module 7 of the traction converter by using cooling liquid provided by the water pump 1;
and the heat exchanger 4 is connected with the first water-cooled radiator 2 and the second water-cooled radiator 3 and is used for exchanging heat of cooling liquid flowing out of the first water-cooled radiator 2 and the second water-cooled radiator 3.
A fan 5 for cooling the cooling liquid in the heat exchanger 4 by an air flow;
and the at least one flow regulating device is arranged between the output end of the water pump 1 and the input end of the heat exchanger 4, and/or between the input end of the water pump 1 and the input end of the heat exchanger 4, and/or between the output end of the water pump 1 and the input end of the first water-cooling radiator 2 or the second water-cooling radiator 3, and is used for regulating the flow of cooling liquid so as to regulate the temperature of the rectifying module 6 and the temperature of the inverter module 7 to be within a target fluctuation range.
The working principle of the water cooling system is as follows: the water pump provides power for the whole water cooling system, the cooled coolant in the heat exchanger 4 and/or the water tank 8 is pumped out to the first water-cooled radiator 2 and the second water-cooled radiator 3 to take away the heat of the rectifier module 6 and the inverter module 7, so that the temperature of the rectifier module 6 and the inverter module 7 is controlled in a reasonable working interval, the temperature of the coolant can be increased accordingly, the coolant flows into the heat exchanger 4 under the driving of pressure, meanwhile, the air flow generated by the fan 5 is utilized to take away the heat, the temperature of the coolant is reduced, the temperature of the coolant at the outlet of the heat exchanger 4 is reduced, and/or the coolant with higher temperature enters the water tank 8 to be cooled, the coolant at the outlet of the heat exchanger 4 and/or the coolant in the water tank 8 are pumped by the water pump 1 to be sent to the first water-cooled radiator 2 and the second water-cooled radiator 3 to cool the rectifier module 6 and the inverter module 7, and the circulation is carried out. In the process, the flow of the cooling liquid is adjusted through at least one flow adjusting device arranged in a pipeline of the water cooling system so as to adjust the temperature of the rectifying module 6 and the inversion module 7 to be within a target fluctuation range.
In practical applications, there may be one or more of the rectifier module 6 and the inverter module 7 of the traction converter, where the rectifier module 6 includes at least one IGBT rectifier device, and the inverter module 7 includes at least one IGBT inverter device. All rectifier modules 6 are configured with a first water-cooled radiator 2 as a whole (rectifier module set), and all inverter modules 7 are configured with a second water-cooled radiator 3 as a whole (inverter module set), so that the rectifier modules 6 and the inverter modules 7 of the traction converter are cooled.
In some implementation manners, the first water-cooled radiator 2 and the second water-cooled radiator 3 may adopt water-cooled plates, and the first water-cooled radiator 2 is attached to the rectifier module 6 of the traction converter through heat-conducting silicone grease; the second water-cooling radiator 3 is attached to an inversion module 7 of the traction converter through heat-conducting silicone grease. The cooling liquid flows into the two water cooling plates to cool the rectifier module 6 and the inverter module 7 (IGBT device of the traction converter) of the traction converter, and the liquid flowing out of the water cooling plates carries the heat of the IGBT device and is sent into the heat exchanger 4 for heat exchange.
In some implementations, the flow regulating device includes an electrically operated valve, the opening of which is adjustable. In practical applications, the electric valve may be an electric valve with a control function, or may be a controllable electric valve, and the electric valve is controlled by an inverter.
In some implementations, the at least one flow regulating device may include:
the first flow adjusting device 9 is arranged between the output end of the water pump 1 and the input end of the heat exchanger 4 and used for adjusting the total flow of the cooling liquid flowing into the first water-cooled radiator 2 and the second water-cooled radiator 3;
a second flow rate adjusting device 10, provided between the input end of the water pump 1 and the input end of the heat exchanger 4, for adjusting the flow rate of the cooling liquid flowing into the heat exchanger 4;
and the third flow regulating device 11 is arranged between the output end of the water pump 1 and the input end of the first water-cooled radiator 2 or the second water-cooled radiator 3 and is used for regulating the flow of the cooling liquid flowing into the first water-cooled radiator 2 and the second water-cooled radiator 3.
By adjusting the flow rate adjusting device in this embodiment, the flow rate entering the first water-cooled radiator 2 and the second water-cooled radiator 3 can be controlled, and the heat dissipation capability of the first water-cooled radiator 2 and the second water-cooled radiator 3 and the water temperature in the water path of the cooling system can be controlled.
Specifically, the functions of the flow rate adjusting devices may be as follows:
first flow rate adjusting device 9: the total flow of the cooling liquid entering the set of the rectifier module 6 and the inverter module 7 is controlled, when the flow regulating device valve 1 is fully opened (the opening degree of the electric valve is regulated to be maximum), at the moment, the cooling liquid flowing into the set of the rectifier module 6 and the inverter module 7 is divided, the flow resistance of a loop where the first flow regulating device 9 is located is reduced, the total flow of the cooling liquid flowing into the set of the rectifier module 6 and the inverter module 7 is minimum, the heat dissipation capacity of the first water-cooled radiator 2 and the second water-cooled radiator 3 is low, when the flow regulating device valve 1 is fully closed (the opening degree of the electric valve is regulated to be minimum), the cooling liquid completely flows into the loop of the set of the rectifier module 6 and the inverter module 7, and at the moment, the heat dissipation capacity of the first water-cooled radiator 2 and the second water-cooled radiator 3 is strong.
Second flow rate adjustment device 10: through the flow that control coolant liquid got into heat exchanger 4, control whole cooling system's return circuit temperature, when rectifier module 6 and contravariant module 7 all are in low-power, when low exothermic operating mode, through reducing the heat dissipation of coolant liquid, promote rectifier module 6 and contravariant module 7's operating temperature under this operating mode, play the effect that reduces the temperature fluctuation, and when rectifier module 6 and contravariant module 7 all are in high power, high-yielding operating mode, through increasing the heat dissipation of coolant liquid, reduce rectifier module 6 and contravariant module 7's operating temperature under this operating mode, play the effect that reduces the temperature fluctuation.
Third flow rate adjusting device 11: because the working conditions of the rectifying module and the inverting module are inconsistent, the flow of the first water-cooled radiator 2 and the flow of the second water-cooled radiator 3 can be further controlled by adjusting the opening degree of the third flow adjusting device 11, when the third flow adjusting device 11 is fully communicated (the opening degree of the electric valve is adjusted to be maximum), the flow entering the inverting module 7 is maximum, the heat dissipation capacity of the second water-cooled radiator 3 is strongest, the flow entering the rectifying module 6 is minimum, the heat dissipation capacity of the first water-cooled radiator 2 is weakest, and therefore the temperature fluctuation of the rectifying module 6 and the temperature fluctuation of the inverting module 7 are reduced simultaneously according to the actual working conditions.
In some implementations, the at least one flow regulating device further includes:
and a fourth flow rate adjusting device 12, which is arranged between the output end of the water pump 1 and the third flow rate adjusting device, and is used for adjusting the flow rate of the cooling liquid flowing into the first water-cooled radiator 2 and the second water-cooled radiator 3. Fine flow control can be realized by matching with the first flow regulating device 9.
The water cooling system of the embodiment can adjust the opening size of each flow adjusting device according to different working conditions (such as high-power working conditions and low-power working conditions), how the flow adjusting devices are adjusted in a matching manner, and the heat dissipation capacity of the first water-cooled radiator and the second water-cooled radiator can be adjusted, so that the temperature adjustment of the rectifying module and the inversion module of the traction converter is realized, the temperature fluctuation of the rectifying module and the inversion module is kept in a target range, the optimal state is reached, and the service life of IGBT devices of the rectifying module and the inversion module is prolonged. The water cooling system can not only realize that the temperature fluctuation of each IGBT device in the traction converter is small under each complex working condition so as to prolong the service life, but also can be matched with the overall design service life of the traction converter, properly reduce redundant design and reduce cost.
Example two
The embodiment provides a water cooling method for a traction converter, which is implemented based on the water cooling system of the traction converter in the foregoing embodiment, and as shown in fig. 2, the method in the embodiment includes:
step S201, in the working process of the traction converter, the temperatures of a rectification module and an inversion module of the traction converter are obtained.
And S202, adjusting at least one flow regulating device based on the acquired temperature by using a preset control mode so as to enable the temperature fluctuation of the rectifying module and/or the inverting module to be in a target range.
In some implementations, the flow regulating device includes an electrically operated valve; in order to reduce the number of actuation of the electric valve and prolong the service life of the electric valve, the preset control mode may include a hysteresis control mode, as shown in fig. 3, wherein the actuator includes each flow rate adjusting device (electric valve) in the above embodiments. The temperature hysteresis compares the temperature of the rectifier module and/or the inverter module with an upper limit (upper temperature limit) T1 of the set temperature hysteresis and a lower limit (lower temperature limit) T2 of the set temperature hysteresis, and then generates a signal corresponding to a case higher than the upper limit T1 or lower than the lower limit T2, and the controller adjusts the opening degree of each electric valve according to the signal.
Adjusting at least one flow regulating device based on the obtained temperature by using a preset control mode so as to enable the temperature fluctuation of the rectifying module and/or the inverting module to be in a target range, and the method comprises the following steps:
comparing the acquired temperature with the set upper temperature limit and the lower temperature limit of hysteresis control;
when the obtained temperature is higher than the set upper limit, adjusting each electric valve to a corresponding first target opening degree so as to improve the heat dissipation capacity of the first water-cooling radiator and the second water-cooling radiator and reduce the temperature of the rectification module and/or the inversion module; when the obtained temperature is lower than the set lower limit, each electric valve is adjusted to the corresponding second target opening degree so as to reduce the heat dissipation capacity of the first water-cooling radiator and the second water-cooling radiator, and maintain the temperature of the rectifier module and/or the inverter module, so that the fluctuation of the temperature of the rectifier module and/or the inverter module is in the target range between the upper temperature limit and the lower temperature limit, and the service life of the rectifier module and the inverter module is prolonged.
In some implementations, the first target opening and the second target opening are combinations of valve openings that minimize temperature fluctuations of the rectifier module and/or the inverter module when the temperature is above a set upper limit and the temperature is below a set lower limit, respectively.
In one example, when the temperature hysteresis comparison result shows that the temperature of the rectifier module and/or the inverter module is higher than T1, a signal is transmitted to the controller, and the controller adjusts the opening degrees of the first flow regulating device 9, the second flow regulating device 10, the third flow regulating device 11, and the fourth flow regulating device 12 to V1, V2, V3, and V4, respectively, at this time, the heat dissipation capacity of the water cooling system is strong, and the temperatures of the rectifier module and the inverter module can be effectively reduced. And when the temperature hysteresis comparison result shows that the temperature of the rectifying module and/or the inverting module is lower than T2, transmitting a signal to the controller, and respectively adjusting the opening degrees of the first flow regulating device 9, the second flow regulating device 10, the third flow regulating device 11 and the fourth flow regulating device 12 to the opening degrees v1, v2, v3 and v4 by the controller, wherein the heat dissipation capacity of the water cooling system is weak, and the water cooling system maintains the temperature of the rectifying module and the temperature of the inverting module.
In practical application, in order to realize that the temperatures of the rectifier module and the inverter module are relatively constant (within a target range with small fluctuation), working condition data of the actual rectifier module and the actual inverter module can be collected, a simulation model is built, the opening of each electric valve and the thermal resistances of the first water-cooling radiator and the second water-cooling radiator are obtained according to measurement, the temperature T when the rectifier module and the inverter module work can be obtained by being brought into the simulation model, and the temperature T can be defined as follows:
T＝f(V,v,T1,T2)
wherein, the first target opening V = [ V1, V2, V3, V4], the second target opening V = [ V1, V2, V3, V4], and f is a simulation model. This makes it possible to obtain:
ΔT＝g(V,v,T1,T2)
where Δ T is the weighted average of the temperature differences. The temperature of the rectifying module and the temperature of the inverting module are relatively constant when the rectifying module and the inverting module work, the temperature fluctuation is small, and delta T is minimum. The optimization problem is thus defined:
min g(V,v,T1,T2)
the electric valve opening and the temperature hysteresis T1 and T2 which enable the Delta T to be minimum can be obtained through an optimization algorithm, such as a genetic algorithm in a heuristic algorithm, an ant colony algorithm and the like.
In some cases, when the service life of the electric valve is long enough, the preset control mode can also adopt any one of PI control, synovial control and neural network control.
In the method of the embodiment, in the working process of the traction converter, the temperatures of the rectification module and the inversion module of the traction converter are obtained, and at least one flow regulating device is adjusted based on the obtained temperatures by using a preset control mode, so that the temperature fluctuation of the rectification module and/or the inversion module is within a target range, the purpose of small temperature fluctuation is achieved, and the service life of an IGBT device of the traction converter is prolonged.
EXAMPLE III
The present embodiment provides a controller for implementing the method of the foregoing embodiment.
The controller may be an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a controller, a Microcontroller (MCU), a microprocessor, or other electronic components, and is configured to perform the methods of the above embodiments.
Example four
The present embodiment provides a Transmission Control Unit (TCU) integrated with the controller of the foregoing embodiment.
In this embodiment, the controller is integrated into the transmission control unit, so that the control function of the transmission control unit can be expanded, and the transmission control unit can control the operation of the specific water cooling system in the foregoing embodiment while controlling the whole train to operate.
EXAMPLE five
The present embodiments provide a traction system, comprising:
a traction converter equipped with the water cooling system of the foregoing embodiment;
the transmission control unit of the foregoing embodiment.
The traction system in this embodiment, the aforementioned water cooling system is installed to the traction converter, can be directed against different operating modes (for example high power operating mode, low power operating mode), adjust each flow regulator's aperture size, how to cooperate the adjustment between each flow regulator, the heat-sinking capability of adjustable first water-cooling radiator and second water-cooling radiator, in order to realize the temperature adjustment to the rectifier module of traction converter and contravariant module, make the temperature fluctuation of rectifier module and contravariant module reach optimum state, thereby promote the IGBT device life-span of rectifier module and contravariant module, and then prolong train traction system's life-span, reduce maintenance number of times and update cost.
In the embodiments provided in the present invention, it should be understood that the disclosed system and method can be implemented in other ways. The system and method embodiments described above are merely illustrative.
It should be noted that, in this document, the terms "first", "second", and the like in the description and claims of the present application and in the drawings described above are used for distinguishing similar objects, and are not necessarily used for describing a particular order or sequence. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
Although the embodiments of the present invention have been described above, the above descriptions are only for the convenience of understanding the present invention, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (12)
1. A water cooling system of a traction converter, comprising:
the water pump is used for providing cooling liquid for the water cooling system;
the first water-cooling radiator is arranged on the rectifying module of the traction converter, is connected with the water pump and is used for cooling the rectifying module of the traction converter by using cooling liquid provided by the water pump;
the second water-cooling radiator is arranged on the inversion module of the traction converter, is connected with the water pump and is used for cooling the inversion module of the traction converter by using cooling liquid provided by the water pump;
the heat exchanger is connected with the first water-cooled radiator and the second water-cooled radiator and is used for carrying out heat exchange on cooling liquid flowing out of the first water-cooled radiator and the second water-cooled radiator;
a fan for cooling the cooling liquid in the heat exchanger by means of an air flow;
at least one flow adjusting device is arranged between the output end of the water pump and the input end of the heat exchanger, and/or between the input end of the water pump and the input end of the heat exchanger, and/or between the output end of the water pump and the input end of the first water-cooling radiator or the input end of the second water-cooling radiator, and is used for adjusting the flow of cooling liquid so as to adjust the temperature of the rectifying module and the temperature of the inverter module, and the temperature is within a target fluctuation range.
2. The water cooling system of the traction converter as claimed in claim 1, wherein the rectifier module comprises at least one IGBT rectifier device and the inverter module comprises at least one IGBT inverter device.
3. The water cooling system of a traction converter as claimed in claim 1, wherein said at least one flow regulation device comprises:
the first flow regulating device is arranged between the output end of the water pump and the input end of the heat exchanger and is used for regulating the total flow of the cooling liquid flowing into the first water-cooled radiator and the second water-cooled radiator;
the second flow regulating device is arranged between the input end of the water pump and the input end of the heat exchanger and is used for regulating the flow of the cooling liquid flowing into the heat exchanger;
and the third flow regulating device is arranged between the output end of the water pump and the input end of the first water-cooled radiator or the second water-cooled radiator and is used for regulating the flow of cooling liquid flowing into the first water-cooled radiator and the second water-cooled radiator.
4. The water cooling system of a traction converter as claimed in claim 1, wherein said flow regulation means comprises an electric valve.
5. The water cooling system of the traction converter as claimed in claim 1, wherein the first water-cooled radiator is attached to the rectifier module of the traction converter by heat-conducting silicone grease; and the second water-cooling radiator is attached to the inversion module of the traction converter through heat-conducting silicone grease.
6. The water cooling system of a traction converter as claimed in claim 4, wherein said at least one flow regulation device further comprises:
and the fourth flow regulating device is arranged between the output end of the water pump and the third flow regulating device and is used for regulating the flow of the cooling liquid flowing into the first water-cooled radiator and the second water-cooled radiator.
7. A water cooling method for a traction converter is realized based on the water cooling system of the traction converter of any one of claims 1 to 6, and the method comprises the following steps:
in the working process of the traction converter, the temperatures of a rectification module and an inversion module of the traction converter are obtained;
and adjusting at least one flow regulating device based on the acquired temperature by using a preset control mode so as to enable the temperature fluctuation of the rectifying module and/or the inverting module to be in a target range.
8. The method as claimed in claim 7, wherein the predetermined control mode comprises a hysteresis control mode, and the flow control device comprises an electric valve;
the adjusting at least one flow regulating device based on the acquired temperature by using a preset control mode so as to enable the temperature fluctuation of the rectifying module and/or the inverting module to be within a target range comprises:
comparing the acquired temperature with the set upper temperature limit and the lower temperature limit of hysteresis control;
when the acquired temperature is higher than a set upper limit, adjusting each electric valve to a corresponding first target opening degree so as to reduce the temperature of the rectifier module and/or the inverter module; and when the acquired temperature is lower than a set lower limit, adjusting each electric valve to a corresponding second target opening degree so as to maintain the temperature of the rectifier module and/or the inverter module, so that the fluctuation of the temperature of the rectifier module and/or the inverter module is in a target range between the upper temperature limit and the lower temperature limit.
9. The method for water cooling of a traction converter according to claim 8, wherein the first target opening and the second target opening are combinations of valve openings that minimize temperature fluctuation of the rectifier module and/or the inverter module when the temperature is higher than a set upper limit and the temperature is lower than a set lower limit, respectively.
10. A controller for implementing the method of any one of claims 7 to 9.
11. A transmission control unit incorporating a controller as claimed in claim 10.
12. A traction system, comprising:
a traction converter equipped with the water cooling system according to any one of claims 1 to 6;
the transmission control unit of claim 11.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211401310.5A CN115800770A (en) | 2022-11-09 | 2022-11-09 | Water cooling system and method of traction converter, controller and traction system |
| PCT/CN2022/134836 WO2024098476A1 (en) | 2022-11-09 | 2022-11-29 | Water-cooling system and method for traction converter, and controller and traction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211401310.5A CN115800770A (en) | 2022-11-09 | 2022-11-09 | Water cooling system and method of traction converter, controller and traction system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115800770A true CN115800770A (en) | 2023-03-14 |
Family
ID=85436463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211401310.5A Pending CN115800770A (en) | 2022-11-09 | 2022-11-09 | Water cooling system and method of traction converter, controller and traction system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115800770A (en) |
| WO (1) | WO2024098476A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4479305B2 (en) * | 2004-03-30 | 2010-06-09 | 三菱電機株式会社 | Power converter |
| CN102158058A (en) * | 2011-05-03 | 2011-08-17 | 哈尔滨工程大学 | Cooling system of high-power power conversion device used for ship |
| JP6370470B2 (en) * | 2015-03-13 | 2018-08-08 | 三菱電機株式会社 | Refrigeration equipment |
| CN108775721B (en) * | 2018-07-27 | 2019-10-29 | 珠海格力电器股份有限公司 | cooling system and control method thereof |
| CN110891397B (en) * | 2018-09-07 | 2021-07-13 | 中车株洲电力机车研究所有限公司 | Water cooling system of converter and control method thereof |
| CN109228836A (en) * | 2018-11-01 | 2019-01-18 | 珠海格力电器股份有限公司 | Integrated cooling system and automobile electric drive system |
-
2022
- 2022-11-09 CN CN202211401310.5A patent/CN115800770A/en active Pending
- 2022-11-29 WO PCT/CN2022/134836 patent/WO2024098476A1/en unknown
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|---|---|
| WO2024098476A1 (en) | 2024-05-16 |
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