CN101451892B - Temperature monitoring system and method for traction converter plant - Google Patents
Temperature monitoring system and method for traction converter plant Download PDFInfo
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- CN101451892B CN101451892B CN2009100766109A CN200910076610A CN101451892B CN 101451892 B CN101451892 B CN 101451892B CN 2009100766109 A CN2009100766109 A CN 2009100766109A CN 200910076610 A CN200910076610 A CN 200910076610A CN 101451892 B CN101451892 B CN 101451892B
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Abstract
The invention provides a temperature monitoring system and method for a pulling deflector. The pulling deflector comprises a pulse rectifier and inverter; the temperature monitoring system comprises the following steps: setting in the above pulse rectifier power module on the first temperature monitoring device, set in the above power inverter module of the second temperature monitoring device; temperature monitoring device described in the first and second temperature monitoring devices were described pulse rectifier according to the power module and the inverter power module heat different, have different pre-set temperature of the security value. The converter described in the use of traction devices and methods of temperature monitoring system can effectively change the flow of the traction of various electrical devices for temperature monitoring equipment to improve the operation of traction converter device reliability.
Description
Technical Field
The invention relates to the technical field of vehicle traction converter devices, in particular to a temperature monitoring system and method of a traction converter device.
Background
Currently, with the rapid development of rail transit, various electric locomotives or diesel locomotives and the like generally adopt high-power traction converter devices, such as Insulated Gate Bipolar Transistor (IGBT) traction converters.
The traction converter generally comprises main circuit equipment such as a pulse rectifier, a direct current filter circuit, an inverter, a vacuum alternating current contactor and the like, and control circuit equipment such as a contactless control device, a control power supply and the like, wherein the equipment is assembled in a box body so as to reduce the space occupied by the equipment after the equipment is assembled. Although such a device configuration can meet the requirements of light weight and compact structure, when the device is operated, the heat flow in a unit volume is increased, so that the heat dissipation problem of the device is more prominent, and therefore, the traction converter device generally needs a cooling system for cooling and a temperature monitoring system for temperature monitoring.
Generally, a temperature monitoring system of a traction converter is to arrange a temperature detection and control device on a main heating part of the traction converter, for example, a power module of a pulse rectifier, a power module of an inverter or a heat sink thereof and set a uniform temperature safety value, and when an actual temperature of equipment during operation exceeds the set safety value, automatically disconnect a main circuit of the traction converter to play a role of over-temperature protection so as to ensure the safety of the equipment during operation.
However, for the current traction converter, the temperature monitoring system cannot completely and effectively monitor each electrical device in the traction converter, and sometimes the power module of the inverter is normal after the power module of the pulse rectifier is overheated and damaged; secondly, even if the power module of the pulse rectifier and the power module of the inverter are protected by over-temperature, other electrical equipment is damaged due to over-high temperature, and therefore the reliability of the traction converter device is affected.
Disclosure of Invention
The invention aims to provide a temperature monitoring system and a temperature monitoring method for a traction converter device, which can effectively monitor the temperature of each electrical equipment in the traction converter device and improve the operation reliability of the traction converter device.
In order to solve the above problems, the present invention provides a temperature monitoring system for a traction converter device, wherein the traction converter device includes a pulse rectifier and an inverter, and the temperature monitoring system includes:
a first temperature monitoring device disposed on a power module of the pulse rectifier,
a second temperature monitoring device disposed on a power module of the inverter;
the first temperature monitoring device and the second temperature monitoring device have different preset temperature safety values respectively according to different heating values of the power module of the pulse rectifier and the power module of the inverter.
The first temperature monitoring device includes: the temperature control device comprises a first temperature relay and a mounting component for fixing the first temperature relay on the heating surface of the power module of the pulse rectifier.
The second temperature monitoring device includes: a second temperature relay and a mounting member fixing the second temperature relay to a heat generating surface of a power module of the inverter.
The mounting member includes: the silicon rubber gasket is positioned between the insulating plate and the first temperature relay or the second temperature relay, and the fixing screws are connected to the heating surface of the power module of the pulse rectifier or the heating surface of the power module of the inverter and fix the insulating plate, the gasket and the first temperature relay or the second temperature relay.
The traction converter device further comprises a resistor, a sensor and a control box which are positioned in an equipment room on the installation side of the power module, and the temperature monitoring system further comprises a third temperature monitoring device which is positioned in the equipment room.
The third temperature monitoring device is connected in parallel with the first temperature monitoring device and/or the second temperature monitoring device.
The power module of the pulse rectifier and the power module of the inverter are provided with radiators, the first temperature relay or the second temperature relay is fixedly connected with the radiators, and the heating surface is a radiating surface of the radiators.
Correspondingly, the invention also provides a temperature monitoring method of the traction converter device, which comprises the following steps:
respectively obtaining the highest temperature borne by each electrical equipment in the traction converter device under the normal working condition;
setting the maximum temperatures as temperature safety values corresponding to the electrical equipment respectively;
respectively monitoring the actual temperature of each electrical equipment;
respectively judging whether the actual temperature of each electrical equipment reaches the corresponding temperature safety value;
if yes, the main circuit of the traction converter device is disconnected.
Each of the electric devices includes: pulse rectifier, inverter and resistance, sensor, the control box in the equipment room.
Compared with the prior art, the technical scheme has the following advantages:
the temperature monitoring system and the method set different temperature safety values aiming at the power module of the pulse rectifier and the power module of the inverter, the temperature monitoring system in the prior art only has one uniform temperature safety value, the technical scheme respectively monitors the actual temperatures of the power module of the pulse rectifier and the power module of the inverter, the actual temperatures are compared and judged according to the actual temperatures and the corresponding temperature safety values, when the actual temperatures are higher than the corresponding temperature safety values, the main circuit of the traction converter device is disconnected for overheat protection, and therefore overheat protection can be carried out according to different heating values of different power modules, and the running reliability of equipment is improved.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings. Like reference numerals refer to like parts throughout the drawings. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.
FIG. 1 is a schematic view of an internal cooling system of a traction deflector according to an embodiment;
FIG. 2 is a schematic view of a temperature monitoring system and an external cooling system of a traction deflector according to an embodiment of the invention;
FIG. 3 is a schematic exploded view of the first temperature monitoring device according to the first embodiment;
fig. 4 is a schematic view of an internal cooling system and a temperature monitoring system of the traction deflector according to the second embodiment.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments disclosed below.
Next, the present invention will be described in detail with reference to the drawings, wherein the cross-sectional views illustrating the structure of the device are not enlarged partially in general scale for convenience of illustration, and the drawings are only exemplary and should not be construed as limiting the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
In order to highlight the features of the present invention, the parts which are necessarily directly related to the inventive points of the present invention are not shown in the drawings, for example, a box body where the traction converter device is located, a locomotive body, an intelligent power module or an IGBT module, a diode, a snubber capacitor, a snubber resistor, a gate interface circuit board, a laminate bus bar or a low-inductance bus bar, a balance resistor, a filter capacitor, and the like.
At present, a traction converter device generally comprises main circuit equipment such as a pulse rectifier, a direct current filter circuit, an inverter and a vacuum alternating current contactor, and control circuit equipment such as a contactless control device and a control power supply, and the equipment is assembled in a box body so as to reduce the space occupied by the equipment after being assembled. Although such a device configuration can meet the requirements of light weight and compact structure, when the device is operated, the heat flow in a unit volume is increased, so that the heat dissipation problem of the device is more prominent, and therefore, the traction converter device generally needs a cooling system for cooling and a temperature monitoring system for temperature monitoring.
Generally, a temperature monitoring system of a traction converter is to arrange a temperature detection and control device on a main heating part of the traction converter, for example, a power module of a pulse rectifier, a power module of an inverter or a heat sink thereof and set a uniform temperature safety value, and when an actual temperature of equipment during operation exceeds the set safety value, automatically disconnect a main circuit of the traction converter to play a role of over-temperature protection so as to ensure the safety of the equipment during operation.
However, for the current traction converter, the temperature monitoring system cannot completely and effectively monitor each electrical device in the traction converter, and sometimes the power module of the inverter is still normal after the power module of the pulse rectifier is overheated and damaged; secondly, even if the power module of the pulse rectifier and the power module of the inverter are protected by over-temperature, other electrical equipment is damaged due to over-high temperature, and therefore the reliability of the traction converter device is affected.
The inventor researches and discovers that sometimes, after a power module of a pulse rectifier is damaged due to overheating, the power module of an inverter is still normal because each electrical device of a traction converter device generates different heat and bears different temperatures during normal operation, but a traditional temperature monitoring system only sets the same temperature safety value for all the electrical devices, so that some electrical devices are burnt out, and some electrical devices do not reach the temperature safety value, and the reliability of the traction converter device is influenced.
Based on this, embodiments of the present invention provide a temperature monitoring system and method for a traction converter device, which respectively set respective temperature safety values for a power module of a pulse rectifier and a power module of an inverter, so as to effectively monitor the temperature of each electrical device in the traction converter device, and improve the reliability of the operation of the traction converter device.
An embodiment of the temperature monitoring system according to the present invention is described in detail below with reference to the accompanying drawings.
Example one
FIG. 1 is a schematic view of the internal cooling system of the traction deflector of this embodiment; fig. 2 is a schematic diagram of a temperature monitoring system and an external cooling system of the traction converter device in the embodiment.
The traction converter device is arranged in a closed box body and comprises:
the power unit is positioned in the center of the box body, the inner cooling unit is positioned on the side face of the box body, the cooling system comprises an external cooling system and an internal cooling system, and the temperature monitoring system is used for monitoring the temperature of the traction converter device.
Referring to fig. 1 and 2, the external cooling system is disposed near the power unit, and dissipates heat from the power unit through heat exchange with the outside of the case; the internal cooling system is arranged near the internal cooling unit and dissipates heat of the internal cooling unit through heat exchange with the external cooling system.
The power unit includes: the pulse rectifier power module and the inverter power module are also the main heating parts of the traction converter device.
Wherein the pulse rectifier power module and the inverter power module include: an Intelligent Power Module (IPM) or IGBT Module, a diode, a snubber capacitor, a snubber resistor, a gate interface circuit board, a laminate bus bar or low-inductance bus bar, a balancing resistor, and a filter capacitor.
The inner cooling unit includes: resistance, sensor, control box. The inner cooling unit is an electrical device in the traction converter and cooled by an internal cooling system.
The electrical equipment configurations of the power unit and the internal cooling unit are as follows: the method comprises the following steps that a single-phase voltage three-point PWM pulse rectifier and a three-phase voltage three-point PWM inverter are adopted, and a box body comprises a U-phase pulse rectifier power module, a V-phase pulse rectifier power module and a U-phase inverter power module, a V-phase inverter power module and a W-phase inverter power module; the pulse rectifier power module and the inverter power module are arranged in the center of the box body, so that power supply equipment can be configured in a centralized manner; resistors, sensors, control boxes, and the like in the internal cooling unit are dispersed at specific positions in the case. The vacuum contactor, the relay unit, the contactless control device, and the like are disposed at the front side of the cabinet to facilitate centralized inspection.
As shown in fig. 2, in this embodiment, the temperature monitoring system of the traction converter device includes:
a first temperature monitoring device disposed on a power module of the pulse rectifier,
a second temperature monitoring device disposed on a power module of the inverter;
the first temperature monitoring device and the second temperature monitoring device have different preset temperature safety values respectively according to different heating values of the power module of the pulse rectifier and the power module of the inverter.
Just because the power modules of the pulse rectifier and the power modules of the inverter of the traction converter device generate different heat quantities and bear different maximum temperatures during normal operation, the maximum temperatures can be respectively used as respective temperature safety values.
The first temperature monitoring device includes: the temperature control device comprises a first temperature relay and a mounting component for fixing the temperature relay on the heating surface of the power module of the pulse rectifier.
The second temperature monitoring device includes: a second temperature relay and a mounting member fixing the temperature relay to a heat-generating surface of a power module of the inverter.
The heating surface is the outer surface of a semiconductor component of the power module. Preferably, the power module is provided with a heat sink, and the heat generating surface is a heat dissipating surface of the heat sink.
Fig. 3 is a schematic view of the first temperature monitoring device, and as shown in fig. 3, the first temperature monitoring device includes: a first temperature relay and a mounting part for fixing the temperature relay to a heat generating surface of a power module of a pulse rectifier, the heat generating surface reaching a heat radiating surface of a heat sink (not shown in the figure), that is, an outer surface of an evaporation part in the figure.
As shown in fig. 3, the mounting part includes: a gasket (e.g., a silicone rubber gasket) between the insulating plate and the first temperature relay, an insulating plate, and a fixing screw connected to a heat emitting surface (i.e., an outer surface of an evaporation portion in the drawing) of a power module (not shown in the drawing) of the pulse rectifier, fixing the insulating plate, the gasket, and the first temperature relay.
The first temperature monitoring device is of a sealed construction and does not require internal maintenance and inspection. When the first temperature relay needs to be taken down for confirming the temperature safety value and the like, the washer and the insulating plate can be detached by loosening the screw, so that the installation and the operation are greatly facilitated.
The second temperature monitoring device is similar to the first temperature monitoring device in composition and structure, and is different in the action temperature of the two temperature relays, namely the temperature safety value of the overheat protection is different.
In this embodiment, the temperature monitoring method of the traction converter adopts the temperature monitoring system to monitor the temperature, and the method includes:
respectively obtaining the highest temperature born by a power module of a pulse rectifier and a power module of an inverter in the traction converter under the normal working condition;
setting the maximum temperatures as temperature safety values corresponding to a power module of the pulse rectifier and a power module of the inverter respectively;
respectively monitoring the actual temperature of the power module of the pulse rectifier and the actual temperature of the power module of the inverter;
respectively judging whether the actual temperatures of the power module of the pulse rectifier and the power module of the inverter reach corresponding temperature safety values;
if yes, the temperature relay disconnects the main circuit of the traction converter device.
The temperature monitoring system and the temperature monitoring method set different temperature safety values aiming at the power module of the pulse rectifier and the power module of the inverter, respectively monitor the actual temperatures of the power module of the pulse rectifier and the power module of the inverter, compare and judge the actual temperatures with the corresponding temperature safety values according to the actual temperatures, and disconnect the main circuit of the traction converter device for overheat protection when the actual temperatures are higher than the corresponding temperature safety values, thereby improving the reliability of the operation of equipment.
The cooling system in the embodiment essentially adopts the air cooling principle. The outer wall of the box body is provided with an air inlet and an air outlet, as shown in figure 1,the internal cooling systemThe method comprises the following steps: auxiliary blowers, air channels and heat pipe exchangers. Wherein,
the auxiliary blower is positioned at the upstream of the inner cooling unit and used for conveying airflow to the inner cooling unit, the airflow brings the heat of the inner cooling unit to the heated end of the heat pipe heat exchanger, and a main blower is arranged on the vehicle side of the power module, for example, a double-impeller electric blower, and supplies air to the power module.
And the air duct is communicated with the heated end of the heat pipe radiator and the auxiliary blower and is used for conveying the airflow flowing through the heated end of the heat pipe heat exchanger back to the auxiliary blower.
And the heating end of the heat pipe heat exchanger is positioned at the downstream of the inner cooling unit, and the radiating end of the heat pipe heat exchanger is positioned in the external cooling system.
As shown in figure 2 of the drawings, in which,the external cooling systemThe method comprises the following steps: a flow divider, a main blower and an exhaust channel. Wherein,
the flow dividing device is positioned at the downstream of the air inlet and is used for dividing the airflow entering from the air inlet to the heat dissipation end of the heat pipe heat exchanger and the main blower,
the main blower is positioned at the upstream of the power unit and used for inputting airflow to the power unit,
and the air exhaust channel is positioned at the downstream of the power unit and used for conveying the airflow flowing through the power unit to the air exhaust outlet.
The upstream and downstream are in accordance with the flow direction of the supply air flow when the cooling system is operating.
The operation of the cooling system in the traction converter is described below.
The cooling system is divided into an internal cooling system and an external cooling system, wherein the former mainly comprises a resistor, a sensor, a control box and other so-called internal cooling units for cooling and temperature reduction, and the latter mainly comprises a power unit for cooling and temperature reduction. The external cooling system directly exchanges heat with the outside of the box body, and the internal cooling system and the external cooling system exchange heat through the heat pipe heat exchanger. Fig. 1 and 2 show the internal cooling system and the external cooling system, respectively.
In the internal cooling system, an auxiliary blower blows air to so-called internal cooling units such as resistors, sensors and a control box which are dispersed in a closed chamber, and the heat is transferred to a heating end of a heat pipe exchanger by airflow, then is transferred to a radiating end from the heating end and is taken away by an external cooling system; and then the independent air duct conveys the airflow flowing through the heated end of the heat pipe heat exchanger back to the auxiliary blower, and the airflow is circularly blown to the internal cooling unit by the auxiliary blower. The air in the internal cooling system is recycled, and no air flow outside the box body enters, so that the dust deposition in the box body is greatly reduced, and the heat can be effectively taken away.
In the external cooling system, air entering the box body from the air inlet is divided into two parts by a downstream flow dividing device, one part of the air flows to the heat dissipation end of the heat pipe heat exchanger to take away heat in the internal cooling system, and then the air enters the main blower; the other part of air directly enters the main blower, and is blown to main heating part power units, such as a pulse rectifier power module and an inverter power module, by the main blower, so that the heat of the power units is taken out of the box body through the air outlet.
It can be seen that, the traction converter device respectively radiates the internal cooling unit and the power unit by the internal cooling system and the external cooling system through integrally configuring the positions of the power unit and the internal cooling unit in the box body, and the internal cooling system does not have air flowing outside the box body, and only exchanges heat with the external cooling system to radiate the internal cooling unit, and the external cooling system directly radiates the power unit, so that no matter the power unit is relatively centralized, or the so-called internal cooling units such as a relatively dispersed resistor, a sensor, a control box and the like are arranged, the heat can be radiated integrally, the temperature rise of the electrical equipment can be controlled, and no external air enters the internal cooling system, the problem of dust accumulation can be avoided, and the operation reliability of the traction converter device can be improved.
Preferably, the air inlet is further provided with an air filter, outside air firstly passes through the air filter and then enters the flow dividing device, and the air filter leaves dust and impurities in the air on the filter to purify the air, so that the dust in the box body is further prevented from accumulating.
Preferably, the external cooling system further includes a heat sink connected to the heat generating portion of the power unit for releasing heat to the heat generating portion of the power unit. The heating part of the power unit is divided into a pulse rectifier power module and an inverter power module, such as an intelligent power module or an IGBT module, a diode, a buffer capacitor, a buffer resistor, a gate interface circuit board, a laminated board bus or a low-inductance bus, a balance resistor, a filter capacitor, and the like. The radiator can fully release the heat of the heating part so as to be taken away by airflow, and the heat dissipation efficiency is improved.
The heat sink may be a heat pipe cooling device, and preferably, the heat sink is a boiling cooler (or a temperature equalizing plate). The boiling cooler adopts an enhanced heat dissipation mode of an element in direct contact with the outer wall of the internal storage refrigeration container, can effectively improve the IPM (or IGBT) disconnection performance (reduce the wiring inductance of a main circuit), enhances the cooling performance of the device, reduces the volume and reduces the weight. The outer wall surface of the evaporation part directly contacts with the element, the heat of the element absorbed by the outer wall surface is transferred to the inner wall surface and then used for boiling the internal refrigerant, and the steam generated by boiling is directly guided to the condensation part consisting of a plurality of radiating fins. The vapor releases latent heat of vaporization and liquefies, and flows back to the evaporation part under the action of gravity. The above-mentioned circulation can realize the cooling performance several times higher than the heat pipe cooling device, thus reduce the quality effectively. In the boiling cooler, the refrigerant is selected to replace Freon, belongs to non-Freon refrigerant, is high in efficiency and can avoid damage to the environment.
In the above embodiments, the vacuum contactor, the relay unit, the contactless control device, and the like are located on the inspection surface side of the housing, and they may be actually used as an internal cooling unit that is cooled by an internal cooling system, that is, the internal cooling unit further includes: vacuum contactor, relay unit and contactless control device. Although the electrical equipment is dispersed at different positions on the side surface of the box body, the heat can be dissipated by an internal cooling system consisting of the auxiliary air blower, the independent air duct and the heat pipe exchanger, and the heat dissipation principle is the same as that of the first embodiment and is not described herein again.
Connecting the temperature monitoring device in the equipment room in parallel with the temperature monitoring device of the pulse rectifier and the inverter can further improve the reliability, as will be explained in the following embodiments.
Example two
Fig. 4 is a schematic diagram of the internal cooling system and the temperature monitoring system of the traction deflector in this embodiment.
As shown in fig. 4, the conventional traction inverter has a heat generating portion including not only the power module of the pulse rectifier and the power module of the inverter but also other electrical devices such as a resistor, a sensor, a control box, a vacuum contactor, a relay unit, a contactless control device (not shown), and the like, which generate a large amount of heat, and an auxiliary blower cools the resistor, the sensor, the control box, and the like.
In order to prevent the malfunction of the electric appliance due to the temperature rise in the sealed chamber (equipment chamber) on the semiconductor element mounting side of the power module caused by the failure of the auxiliary blower, a third temperature monitoring device may be provided, thereby further improving the reliability of the traction converter.
As shown in fig. 4, the difference between this embodiment and the first embodiment is that the traction converter further includes a resistor, a sensor, and a control box located in an equipment room on the installation side of the power module (i.e., on the installation side of the semiconductor element), and then the temperature monitoring system in this embodiment further includes a third temperature monitoring device located in the equipment room.
The third temperature monitoring device has the same composition and structure as the first and second temperature monitoring devices in the first embodiment, and the difference between the third temperature monitoring device and the first and second temperature monitoring devices includes a second temperature relay and a mounting component for fixing the second temperature relay is that the operating temperatures of the temperature relays are different, that is, the temperature safety values at which the overheat protection occurs are different.
The temperature safety value of the third temperature monitoring device is related to the heat productivity of the electrical equipment in the equipment room.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments, using the methods and techniques disclosed above, without departing from the scope of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (10)
1. A temperature monitoring system for a traction converter, the traction converter comprising a pulse rectifier and an inverter, the temperature monitoring system comprising:
a first temperature monitoring device disposed on a power module of the pulse rectifier,
a second temperature monitoring device disposed on a power module of the inverter;
the first temperature monitoring device and the second temperature monitoring device have different preset temperature safety values respectively according to different heating values of the power module of the pulse rectifier and the power module of the inverter.
2. The traction deflector temperature monitoring system of claim 1, wherein the first temperature monitoring device comprises: the temperature control device comprises a first temperature relay and a mounting component for fixing the first temperature relay on the heating surface of the power module of the pulse rectifier.
3. The traction deflector temperature monitoring system of claim 1, wherein the second temperature monitoring device comprises: a second temperature relay and a mounting member fixing the second temperature relay to a heat generating surface of a power module of the inverter.
4. The traction deflector temperature monitoring system of claim 2, wherein the mounting member comprises: the gasket is located between the insulating plate and the first temperature relay, and the fixing screws are connected to the heating surface of the power module of the pulse rectifier and fix the insulating plate, the gasket and the first temperature relay.
5. The traction deflector temperature monitoring system of claim 3, wherein the mounting member comprises: the gasket is located between the insulating plate and the second temperature relay, and the fixing screws are connected to the heating surface of the power module of the inverter and fix the insulating plate, the gasket and the second temperature relay.
6. The temperature monitoring system of a traction converter as recited in claim 1, further comprising a resistor, a sensor, and a control box located in an equipment room on the installation side of the power module, wherein the temperature monitoring system further comprises a third temperature monitoring device, and wherein the third temperature detecting device is located in the equipment room.
7. The traction deflector temperature monitoring system of claim 6, wherein the third temperature monitoring device is connected in parallel with the first temperature monitoring device and/or the second temperature monitoring device.
8. The system of claim 2, wherein the power module of the pulse rectifier includes a heat sink, the first temperature relay is fixedly connected to the heat sink, and the heat-generating surface is a heat-dissipating surface of the heat sink.
9. The system as recited in claim 3, wherein a heat sink is disposed in the power module of the inverter, the second temperature relay is fixedly connected to the heat sink, and the heat-generating surface is a heat-dissipating surface of the heat sink.
10. A temperature monitoring method for a traction converter device is characterized by comprising the following steps:
respectively obtaining the highest temperature born by a power module of a pulse rectifier and a power module of an inverter in the traction converter under the normal working condition;
setting the maximum temperatures as temperature safety values corresponding to a power module of the pulse rectifier and a power module of the inverter respectively;
respectively monitoring the actual temperature of the power module of the pulse rectifier and the actual temperature of the power module of the inverter;
respectively judging whether the actual temperatures of the power module of the pulse rectifier and the power module of the inverter reach corresponding temperature safety values;
if yes, the main circuit of the traction converter device is disconnected.
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| CN110768512B (en) * | 2019-10-28 | 2022-09-30 | 常州工学院 | Temperature online monitoring system of modular multilevel converter |
| CN114132349B (en) * | 2021-11-26 | 2023-04-14 | 株洲中车时代电气股份有限公司 | Converter cooling system, maintenance method, maintenance device and converter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2597971Y (en) * | 2003-01-30 | 2004-01-07 | 费万民 | On line detector for high-voltage switch bus temp. |
| US7312593B1 (en) * | 2006-08-21 | 2007-12-25 | Rockwell Automation Technologies, Inc. | Thermal regulation of AC drive |
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2009
- 2009-01-09 CN CN2009100766109A patent/CN101451892B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2597971Y (en) * | 2003-01-30 | 2004-01-07 | 费万民 | On line detector for high-voltage switch bus temp. |
| US7312593B1 (en) * | 2006-08-21 | 2007-12-25 | Rockwell Automation Technologies, Inc. | Thermal regulation of AC drive |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平7-245965A 1995.09.19 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101451892A (en) | 2009-06-10 |
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