WO2019220587A1 - 車載用変圧器および油流継電器 - Google Patents
車載用変圧器および油流継電器 Download PDFInfo
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- WO2019220587A1 WO2019220587A1 PCT/JP2018/019075 JP2018019075W WO2019220587A1 WO 2019220587 A1 WO2019220587 A1 WO 2019220587A1 JP 2018019075 W JP2018019075 W JP 2018019075W WO 2019220587 A1 WO2019220587 A1 WO 2019220587A1
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- oil
- insulating oil
- movable contact
- central axis
- blade member
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/40—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by devices allowing continual flow of fluid, e.g. vane
Definitions
- the present invention relates to an on-vehicle transformer and an oil flow relay.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2004-363253 is a prior document disclosing the configuration of an on-vehicle transformer.
- the on-vehicle transformer described in Patent Document 1 includes piping, a transformer body, and a plurality of coolers.
- the pipe forms a refrigerant circulation path.
- the transformer main body is disposed in the middle of the pipe and accommodates the refrigerant together with the windings.
- the plurality of coolers are dispersed and arranged in the middle of the pipe line to cool the refrigerant by heat exchange with air.
- the plurality of coolers are distributed and arranged below the vehicle floor, which serves as a path for traveling wind.
- an oil flow relay is installed in a connection pipe through which the insulating oil flows.
- the oil flow relay operates when the flow rate of the insulating oil becomes equal to or less than a threshold value in order to prevent the transformer body from being insufficiently cooled.
- in-vehicle transformers may use insulating oil that has a low environmental impact and high viscosity temperature dependency.
- Insulating oil having a high temperature dependency of viscosity increases in viscosity and decreases in fluidity as the temperature decreases. Therefore, when the above insulating oil is used, the oil flow relay may erroneously detect an abnormality in the on-vehicle transformer at low temperatures.
- thermometer In conventional on-vehicle transformers, a thermometer is installed and control using the measured value of the thermometer is performed in order to suppress erroneous detection of the oil flow relay.
- the present invention has been made in view of the above problems, and provides an in-vehicle transformer and an oil flow relay that can suppress erroneous detection of an oil flow relay at a low temperature without providing a thermometer. Objective.
- the on-vehicle transformer includes a transformer main body, a tank, insulating oil, a cooler, a connection pipe, a pump, and an oil flow relay.
- the tank houses the transformer body. Insulating oil fills the tank and cools the transformer body.
- the cooler cools the insulating oil.
- the connection pipe connects the tank and the cooler to each other.
- the pump is installed in the connecting pipe and circulates insulating oil between the tank and the cooler.
- the oil flow relay is installed on the discharge part side of the pump in the connection pipe.
- the oil flow relay includes a blade member, a movable contact, and a fixed contact.
- the blade member is disposed in the connection pipe and is supported so as to be rotatable about a central axis orthogonal to the connection pipe.
- the movable contact has a movable contact and rotates around the central axis as the blade member rotates.
- the fixed contact is located on the rotation path of the movable contact.
- the oil flow relay is configured such that the operating flow rate of the oil flow relay, which is the flow rate of the insulating oil flowing through the connection pipe when the movable contact and the fixed contact are in contact, decreases as the temperature of the insulating oil decreases. Yes.
- the oil flow relay is configured such that the operating flow rate of the oil flow relay decreases as the temperature of the insulating oil passing through the oil flow relay decreases, so that a thermometer is not provided. In addition, erroneous detection of the oil flow relay at low temperatures can be suppressed.
- the oil flow relay which concerns on Embodiment 3 of this invention WHEREIN: When the flow volume of the insulating oil which flows through connection piping is the operating flow volume at the time of the high temperature shown in FIG. 10, the movable contactor and fixed contact at the time of low temperature are shown.
- FIG. In the oil flow relay which concerns on Embodiment 3 of this invention it is a perspective view which shows the state in which the flow volume of the insulating oil which flows through connection piping is the operating flow volume at the time of low temperature.
- FIG. 1 is a system diagram showing the configuration of the on-vehicle transformer according to Embodiment 1 of the present invention.
- FIG. 2 is a perspective view showing a state of the oil flow relay installed in the in-vehicle transformer according to Embodiment 1 of the present invention at a high temperature and when the pump is stopped.
- FIG. 3 is a perspective view showing a state of the oil flow relay installed in the in-vehicle transformer according to Embodiment 1 of the present invention at a high temperature and during a pump operation.
- FIG. 4 is a schematic diagram when the internal structure of the oil flow relay according to the first embodiment of the present invention is viewed from the central axis direction.
- FIG. 1 is a system diagram showing the configuration of the on-vehicle transformer according to Embodiment 1 of the present invention.
- FIG. 2 is a perspective view showing a state of the oil flow relay installed in the in-vehicle transformer according to Embodiment 1 of the present invention at a high temperature
- FIG. 5 is a perspective view showing the shape of the blade member at a high temperature of the oil flow relay according to the first embodiment of the present invention.
- FIG. 6 is a perspective view showing a state of the oil flow relay installed in the in-vehicle transformer according to Embodiment 1 of the present invention at a low temperature and when the pump is stopped.
- the high temperature is when the temperature of the insulating oil passing through the oil flow relay is relatively high
- the low temperature is when the temperature of the insulating oil passing through the oil flow relay is It is a relatively low time.
- the on-vehicle transformer 100 includes a transformer body 1, a tank 110, an insulating oil 120, a cooler 130, a connection pipe 140, and a pump 150. And an oil flow relay 160.
- the in-vehicle transformer 100 in the present embodiment is mounted on, for example, a railway vehicle.
- the on-vehicle transformer 100 mounted on the railway vehicle has a higher frequency of operation stoppage than the power transformer. Therefore, in the in-vehicle transformer 100, it is important to suppress erroneous detection of the oil flow relay at the start of operation, that is, at a low temperature.
- the transformer body 1 converts the high-voltage current supplied from the overhead line into a low-voltage current, and supplies the current to a motor or an air conditioner used for the railway vehicle. .
- the transformer body 1 is accommodated in the tank 110.
- the insulating oil 120 is filled in the tank 110 to cool the transformer body 1. Since the in-vehicle transformer 100 can be mounted on a railway vehicle, the insulating oil 120 is preferably an insulating oil that does not easily burn from the viewpoint of safety.
- insulating oil 120 ester oil which is vegetable oil, or silicone oil is mentioned, for example. An increasing number of users specify ester oil as the insulating oil 120. Note that ester oil has a higher temperature dependency of viscosity than silicone oil.
- the insulating oil 120 having a high temperature dependency of viscosity, such as ester oil has a remarkable tendency that the viscosity decreases as the temperature increases and increases as the temperature decreases. For this reason, the insulating oil 120 having a high temperature dependency of viscosity such as ester oil has a lower viscosity and higher fluidity as the temperature increases in the connection pipe 140, and the viscosity increases as the temperature decreases. Higher and less fluid.
- the cooler 130 is cooling the insulating oil 120.
- Examples of the cooler 130 include an air-cooled cooler, but are not particularly limited.
- connection pipe 140 connects the tank 110 and the cooler 130 to each other.
- the connection pipe 140 includes a first connection pipe for sending the insulating oil 120 from the cooler 130 to the tank 110 and a second connection pipe for sending the insulating oil 120 from the tank 110 to the cooler 130.
- the pump 150 is installed in the connection pipe 140 and circulates the insulating oil 120 between the tank 110 and the cooler 130.
- the pump 150 is installed in the second connection pipe.
- the insulating oil 120 whose temperature has been increased by cooling the transformer main body 1 accommodated in the tank 110 is sent from the tank 110 to the cooler 130 via the second connection pipe among the connection pipes 140 and cooled. .
- the cooled insulating oil 120 is sent from the cooler 130 to the tank 110 via the first connection pipe among the connection pipes 140 to cool the transformer body 1 again.
- the oil flow relay 160 is installed on the discharge part side of the pump 150 in the connection pipe 140.
- the oil flow relay 160 is installed in the second connection pipe among the connection pipes 140.
- the oil flow relay 160 is provided between the pump 150 and the cooler 130.
- the oil flow relay 160 includes a blade member 162, a movable contact 164, and a fixed contact 166.
- the blade member 162 is disposed inside a pipe through which the insulating oil 120 flows, and is supported so as to be rotatable about a central axis C orthogonal to the pipe.
- the blade member 162 is disposed in the connection pipe 140 and is supported so as to be rotatable about a central axis C orthogonal to the connection pipe 140.
- the flowing direction of the insulating oil 120 is indicated by an arrow, but in the state of FIG. 2, the insulating oil 120 does not flow.
- the blade member 162 includes a plate-like portion extending in the radial direction from the central axis C, and the outer shape of the main surface of the plate-like portion is a substantially rectangular shape.
- the radially outer side portion of the plate-like portion is curved in an arc shape radially outward.
- the plate-like portion of the blade member 162 during the pump operation is such that the blade member 162 rotates about the central axis C when the flow rate of the insulating oil 120 becomes a certain amount or more. It becomes substantially horizontal so that the piping in which the relay relay 160 is installed, that is, the extending direction of the connection piping 140 is along.
- the movable contact 164 has a movable contact 164 c inside the oil flow relay 160 and rotates around the central axis C as the blade member 162 rotates.
- a hollow portion 168 is formed inside the oil flow relay 160 so that the movable contact 164 can rotate.
- the fixed contact 166 is located on the rotation path of the movable contact 164c.
- the position of the movable contact 164 when the pump 150 is in operation at a high temperature is indicated by a solid line, and the movable contact 164 when the movable contact 164 c and the fixed contact 166 are in contact, and
- the position of each of the movable contacts 164 when the pump 150 is not operating is indicated by dotted lines.
- the blade member 162 includes a first plate-like portion 162a and a second plate-like portion 162b as plate-like portions.
- the first plate-like portion 162a and the second plate-like portion 162b have substantially the same shape at high temperatures, but they may have different shapes.
- the first plate-like portion 162a extends in the radial direction of the central axis C from the central axis C.
- the outer shape of the main surface of the first plate-like portion 162a is a substantially rectangular shape.
- the radially outer side portion of the first plate-like portion 162a is curved radially outward.
- the second plate-like portion 162b extends in the radial direction from above the central axis C, and is joined to the downstream side in the flow direction of the insulating oil 120 of the first plate-like portion 162a. That is, the second plate-like portion 162b extends in the radial direction from above the central axis C, and is joined to the opposite side of the first plate-like portion 162a from the pump 150 side.
- the outer shape of the main surface of the second plate-like portion 162b is a substantially rectangular shape.
- the side portion on the radially outer side in the second plate-like portion 162b is curved outward in the radial direction.
- the blade member 162 further has a shaft portion 162c extending on the central axis C.
- the blade member 162 may be configured by joining the shaft portion 162c and each of the first plate-like portion 162a and the second plate-like portion 162b. Further, the shaft portion 162c and any one of the first plate-like portion 162a and the second plate-like portion 162b may be configured as an integral member.
- the blade member 162 is supported by a bearing portion 163 that is in sliding contact with the shaft portion 162c.
- the bearing portion 163 has a cylindrical shape, but is not particularly limited as long as it has a shape in sliding contact with the shaft portion 162c. As shown in FIG. 2, the bearing portion 163 is exposed to the outside of the oil flow relay 160, but may be accommodated inside the oil flow relay 160.
- the first plate-like portion 162a is made of a material having a higher coefficient of thermal expansion than the second plate-like portion 162b.
- Each of the first plate-like portion 162a and the second plate-like portion 162b is made of a metal material or a resin material, but is not limited thereto.
- a so-called bimetal is formed.
- the first plate-like portion 162a is made of a material having a higher coefficient of thermal expansion than the second plate-like portion 162b, the first plate-like portion 162a becomes the second plate at a low temperature as shown in FIG.
- the blade member 162 is curved so as to protrude toward the second plate-shaped portion 162b because it contracts from the shape-shaped portion 162b. For this reason, as the temperature decreases, the blade member 162 becomes more susceptible to rotational power from the flowing insulating oil 120, and when the flow rate decreases due to the increase in viscosity of the insulating oil 120 at low temperatures, The rotational power can be compensated.
- the oil flow relay 160 has an operation flow rate of the oil flow relay 160 that is the flow rate of the insulating oil 120 flowing through the pipe when the movable contact 164c and the fixed contact 166 are in contact with each other. It is comprised so that it may become small as the temperature of the insulating oil 120 becomes low. That is, the oil flow relay 160 in the on-vehicle transformer 100 according to the present embodiment is the oil flow relay 160 that is the flow rate of the insulating oil 120 flowing through the connection pipe 140 when the movable contact 164c and the fixed contact 166 are in contact with each other.
- the operating flow rate is configured to decrease as the temperature of the insulating oil 120 decreases.
- the blade member 162 is curved as the temperature is lowered, and the blade member 162 is obtained from the insulating oil 120 whose flow rate is decreased due to an increase in viscosity because the blade member 162 is easily subjected to rotational power from the flowing insulating oil 120.
- the flow rate of the insulating oil 120 flowing through the connection pipe 140 when the movable contact 164c and the fixed contact 166 come into contact with each other can be reduced. That is, the operating flow rate of the oil flow relay 160 can be reduced as the temperature of the insulating oil 120 decreases.
- FIG. 7 is a graph showing transitions of the flow rate of the insulating oil in the connecting pipe and the operating flow rate of the oil flow relay with respect to the temperature of the insulating oil flowing in the connecting pipe in this experimental example.
- the horizontal axis represents the temperature (° C.) of the insulating oil
- the vertical axis represents each flow rate (L / min).
- the operating flow rate of the oil flow relay 160 was decreased as the temperature of the insulating oil 120 was decreased. From the results of this experiment, in the in-vehicle transformer 100 according to the present embodiment, if the pump 150 operates normally and the temperature of the insulating oil 120 is ⁇ 20 ° C. or higher, the insulating oil in the connection pipe 140 is Since the flow rate of 120 does not fall below the operating flow rate of the oil flow relay 160, it was confirmed that the oil flow relay 160 can be prevented from erroneously detecting an abnormality in the in-vehicle transformer 100.
- in-vehicle transformer 100 and oil flow relay 160 are configured such that the operating flow rate of oil flow relay 160 decreases as the temperature of insulating oil 120 decreases.
- the operating flow rate of oil flow relay 160 decreases as the temperature of insulating oil 120 decreases.
- the railway vehicle equipped with the on-vehicle transformer 100 according to the present embodiment which has been reduced in size and reduced in mass, can travel faster and travel with more cargo or people. be able to.
- the first plate-like portion 162a is made of a material having a higher coefficient of thermal expansion than the second plate-like portion 162b, when the temperature of the insulating oil 120 is lowered, the blade member 162 is insulated. It can deform
- FIG. 1 a vehicle-mounted transformer and an oil flow relay according to Embodiment 2 of the present invention will be described.
- the on-vehicle transformer and the oil flow relay according to the second embodiment of the present invention are different from the on-vehicle transformer 100 and the oil flow relay 160 according to the first embodiment of the present invention in terms of the operating flow rate and the insulating oil temperature. Since the configuration for making the size smaller as it becomes lower is mainly different, the description of the same configuration as in-vehicle transformer 100 and oil flow relay 160 according to Embodiment 1 of the present invention will not be repeated.
- FIG. 8 is a schematic diagram showing the compressive stress generated between the shaft portion and the bearing portion at a high temperature when viewed from the center axis direction in the oil flow relay according to the second embodiment of the present invention.
- FIG. 9 is a schematic view showing the compressive stress generated between the shaft portion and the bearing portion at a low temperature when viewed from the center axis direction in the oil flow relay according to the second embodiment of the present invention.
- the plate-like portion of the blade member 162 is constituted by an integral member.
- the shaft portion 162c is made of a material having a higher thermal expansion coefficient than the bearing portion 163.
- Each of the shaft portion 162c and the bearing portion 163 is made of a metal material or a resin material, but each material of the shaft portion 162c and the bearing portion 163 is not limited thereto.
- the shaft portion 162c is made of a material having a higher thermal expansion coefficient than the bearing portion 163, the shaft portion 162c contracts more than the bearing portion 163 at a low temperature.
- the compressive stress generated between the shaft portion 162c and the bearing portion 163 at a low temperature shown in FIG. 9 is the compressive stress generated between the shaft portion 162c and the bearing portion 163 at a high temperature shown in FIG. It becomes small compared. For this reason, the rotational force required for rotation of the blade member 162 decreases as the temperature decreases.
- the rotational power necessary for the rotation of the blade member 162 can be reduced as the temperature is lowered, so that the rotational power of the blade member 162 obtained from the insulating oil 120 whose flow rate has decreased due to increased viscosity is reduced. Also, the blade member 162 can be rotated. As a result, the flow rate of the insulating oil 120 flowing through the connection pipe 140 when the movable contact 164c and the fixed contact 166 come into contact with each other can be reduced. That is, the operating flow rate of the oil flow relay can be reduced as the temperature of the insulating oil 120 decreases.
- the shaft portion 162c is made of a material having a higher coefficient of thermal expansion than the bearing portion 163. Therefore, when the temperature of the insulating oil 120 is lowered, the rotational force necessary for the rotation of the blade member 162 is increased. Can be reduced. For this reason, the operating flow rate of the oil flow relay can be reduced as the temperature of the insulating oil 120 decreases.
- Embodiment 3 a vehicle-mounted transformer and an oil flow relay according to Embodiment 3 of the present invention will be described.
- the in-vehicle transformer and the oil flow relay according to the third embodiment of the present invention are different from the in-vehicle transformer 100 and the oil flow relay 160 according to the first embodiment of the present invention in terms of the operating flow rate and the insulating oil temperature. Since the configuration for making the size smaller as it becomes lower is mainly different, the description of the same configuration as in-vehicle transformer 100 and oil flow relay 160 according to Embodiment 1 of the present invention will not be repeated.
- FIG. 10 is a diagram showing a movable contact and a fixed contact at a high temperature when the flow rate of the insulating oil flowing through the connection pipe is the operating flow rate in the oil flow relay according to the third embodiment of the present invention.
- FIG. 11 shows a movable contact at a low temperature when the flow rate of the insulating oil flowing through the connection pipe is the operating flow rate at a high temperature shown in FIG. 10 in the oil flow relay according to the third embodiment of the present invention. It is a figure which shows a fixed contact.
- FIG. 12 is a perspective view showing a state in which the flow rate of the insulating oil flowing through the connection pipe is the operating flow rate at a low temperature in the oil flow relay according to the third embodiment of the present invention.
- the plate-like portion of the blade member 162 is formed of an integral member.
- movable contact 164 includes a first piece 164a and a second piece 164b. Yes.
- the first piece 164a extends in the radial direction of the central axis C.
- One end of the first piece portion 164a is directly or indirectly connected to the shaft portion 162c of the blade member 162.
- the other end of the first piece 164a is connected to the movable contact 164c.
- the second piece 164b extends in the radial direction and is joined to the first piece 164a on the rear side in the rotational direction of the movable contact 164 when the flow rate of the insulating oil 120 is increased.
- One end of the second piece 164b is directly or indirectly connected to the shaft portion 162c of the blade member 162.
- the other end of the second piece 164b is connected to the movable contact 164c.
- the second piece 164b is joined to the first piece 164a over the entire radial direction of the first piece 164a.
- the first piece 164a is made of a material having a higher thermal expansion coefficient than the second piece 164b.
- Each of the first piece 164a and the second piece 164b is made of a metal material or a resin material, but each material of the first piece 164a and the second piece 164b is not limited thereto.
- the first piece 164a since the first piece 164a is made of a material having a higher coefficient of thermal expansion than the second piece 164b, the first piece 164a contracts more than the second piece 164b at a low temperature. To do.
- the movable contact 164 is curved so as to protrude toward the second piece 164b. For this reason, the movable contact 164c is moving forward in the rotational direction of the movable contact 164 when the flow rate of the insulating oil 120 is increased. Thereby, as the temperature decreases, the flow rate of the insulating oil 120 flowing through the connection pipe 140 when the movable contact 164c and the fixed contact 166 come into contact with each other can be reduced. That is, the operating flow rate of the oil flow relay can be reduced as the temperature of the insulating oil 120 decreases.
- the rotation angle of the blade member 162 in a state where the flow rate of the insulating oil 120 flowing through the connection pipe 140 is the operating flow rate at a low temperature can be reduced.
- the movable contact 164c and the fixed contact 166 are in contact with each other because the first piece 164a of the movable contact 164 is made of a material having a higher thermal expansion coefficient than the second piece 164b.
- the flow rate of the insulating oil 120 flowing through the connection pipe 140 can be reduced. That is, the operating flow rate of the oil flow relay can be reduced as the temperature of the insulating oil 120 decreases.
- transformer body 100 on-vehicle transformer, 110 tank, 120 insulating oil, 130 cooler, 140 connecting pipe, 150 pump, 160 oil flow relay, 162 blade member, 162a first plate, 162b second plate Part, 162c shaft part, 163 bearing part, 164 movable contact, 164a first piece part, 164b second piece part, 164c movable contact, 166 fixed contact, 168 hollow part, C central axis.
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Abstract
Description
図1は、本発明の実施の形態1に係る車載用変圧器の構成を示す系統図である。図2は、本発明の実施の形態1に係る車載用変圧器に設置された油流継電器の、高温時かつポンプ停止時の状態を示した斜視図である。図3は、本発明の実施の形態1に係る車載用変圧器に設置された油流継電器の、高温時かつポンプ運転時の状態を示した斜視図である。図4は、本発明の実施の形態1に係る油流継電器の内部の構造を、中心軸方向から見たときの模式図である。図5は、本発明の実施の形態1に係る油流継電器の、高温時の羽根部材の形状を示す斜視図である。図6は、本発明の実施の形態1に係る車載用変圧器に設置された油流継電器の、低温時かつポンプ停止時の状態を示す斜視図である。
以下、本発明の実施の形態2に係る車載用変圧器および油流継電器について説明する。本発明の実施の形態2に係る車載用変圧器および油流継電器は、本発明の実施の形態1に係る車載用変圧器100および油流継電器160とは、作動流量を、絶縁油の温度が低くなるにしたがって小さくするための構成が主に異なるため、本発明の実施の形態1に係る車載用変圧器100および油流継電器160と同様である構成については説明を繰り返さない。
以下、本発明の実施の形態3に係る車載用変圧器および油流継電器について説明する。本発明の実施の形態3に係る車載用変圧器および油流継電器は、本発明の実施の形態1に係る車載用変圧器100および油流継電器160とは、作動流量を、絶縁油の温度が低くなるにしたがって小さくするための構成が主に異なるため、本発明の実施の形態1に係る車載用変圧器100および油流継電器160と同様である構成については説明を繰り返さない。
Claims (8)
- 変圧器本体と、
前記変圧器本体が収容されたタンクと、
前記タンクに充填され、前記変圧器本体を冷却する絶縁油と、
前記絶縁油を冷却する冷却器と、
前記タンクと前記冷却器とを互いに接続する接続配管と、
前記接続配管に設置され、前記タンクと前記冷却器との間で前記絶縁油を循環させるポンプと、
前記接続配管における前記ポンプの吐き出し部側に設置された油流継電器とを備え、
前記油流継電器は、
前記接続配管内に配置され、前記接続配管と直交する中心軸を中心に回動可能に支持された羽根部材と、
可動接点を有し、前記羽根部材の回動とともに前記中心軸を中心に回動する可動接触子と、
前記可動接点の回動経路上に位置する固定接点とを含み、
前記油流継電器は、前記可動接点と前記固定接点とが接触するときの前記接続配管を流れる前記絶縁油の流量である前記油流継電器の作動流量が、前記絶縁油の温度が低くなるにしたがって小さくなるように構成されている、車載用変圧器。 - 前記羽根部材は、
前記中心軸上から前記中心軸の径方向に延出する第1板状部と、
前記中心軸上から前記径方向に延出し、前記第1板状部におけるポンプ側とは反対側に接合された第2板状部とを含み、
前記第1板状部は、前記第2板状部より熱膨張率の高い材料で構成されている、請求項1に記載の車載用変圧器。 - 前記羽根部材は、前記中心軸上に延在する軸部を有し、かつ、該軸部と摺接する軸受部に支持されており、
前記軸部は、前記軸受部より熱膨張率の高い材料で構成されている、請求項1に記載の車載用変圧器。 - 前記羽根部材は、前記中心軸上に延在する軸部を有し、
前記可動接触子は、
前記中心軸の径方向に延在する第1片部と、
前記径方向に延在し、前記第1片部における、前記絶縁油の流量が増加した際の前記可動接触子の回動方向の後方側に、接合された第2片部とを含み、
前記第1片部は、前記第2片部より熱膨張率の高い材料で構成されている、請求項1に記載の車載用変圧器。 - 内部を絶縁油が流動する配管内に配置され、前記配管と直交する中心軸を中心に回動可能に支持された羽根部材と、
可動接点を有し、前記羽根部材の回動とともに前記中心軸を中心に回動する可動接触子と、
前記可動接点の回動経路上に位置する固定接点とを備え、
前記可動接点と前記固定接点とが接触するときの前記配管を流れる前記絶縁油の流量である作動流量が、前記絶縁油の温度が低くなるにしたがって小さくなるように構成されている、油流継電器。 - 前記羽根部材は、
前記中心軸上から前記中心軸の径方向に延出する第1板状部と、
前記中心軸上から前記径方向に延出し、前記第1板状部の前記絶縁油の流動方向下流側に接合された第2板状部とを含み、
前記第1板状部は、前記第2板状部より熱膨張率の高い材料で構成されている、請求項5に記載の油流継電器。 - 前記羽根部材は、前記中心軸上に延在する軸部を有し、かつ、該軸部と摺接する軸受部に支持されており、
前記軸部は、前記軸受部より熱膨張率の高い材料で構成されている、請求項5に記載の油流継電器。 - 前記羽根部材は、前記中心軸上に延在する軸部を有し、
前記可動接触子は、
前記中心軸の径方向に延在する第1片部と、
前記径方向に延在し、前記第1片部における、前記絶縁油の流量が増加した際の前記可動接触子の回動方向の後方側に、接合された第2片部とを含み、
前記第1片部は、前記第2片部より熱膨張率の高い材料で構成されている、請求項5に記載の油流継電器。
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EP18919004.4A EP3796343A4 (en) | 2018-05-17 | 2018-05-17 | TRANSFORMER ON BOARD A VEHICLE AND OIL FLOW RELAY |
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Citations (5)
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JPS58215511A (ja) * | 1982-06-09 | 1983-12-15 | Hitachi Ltd | 変圧器用油流指示装置 |
JPS5990758A (ja) * | 1982-11-16 | 1984-05-25 | Nissan Motor Co Ltd | 内燃機関の排気還流装置 |
JPS61204340U (ja) * | 1985-06-12 | 1986-12-23 | ||
JP2004363253A (ja) | 2003-06-03 | 2004-12-24 | Japan Ae Power Systems Corp | 車両用変圧器 |
WO2015025392A1 (ja) * | 2013-08-22 | 2015-02-26 | 三菱電機株式会社 | 変圧器 |
-
2018
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- 2018-05-17 EP EP18919004.4A patent/EP3796343A4/en active Pending
- 2018-05-17 WO PCT/JP2018/019075 patent/WO2019220587A1/ja active Application Filing
Patent Citations (5)
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JPS58215511A (ja) * | 1982-06-09 | 1983-12-15 | Hitachi Ltd | 変圧器用油流指示装置 |
JPS5990758A (ja) * | 1982-11-16 | 1984-05-25 | Nissan Motor Co Ltd | 内燃機関の排気還流装置 |
JPS61204340U (ja) * | 1985-06-12 | 1986-12-23 | ||
JP2004363253A (ja) | 2003-06-03 | 2004-12-24 | Japan Ae Power Systems Corp | 車両用変圧器 |
WO2015025392A1 (ja) * | 2013-08-22 | 2015-02-26 | 三菱電機株式会社 | 変圧器 |
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EP4092370A4 (en) * | 2020-01-14 | 2023-02-08 | Mitsubishi Electric Corporation | VEHICLE MOUNTED TRANSFORMER |
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JP6448883B1 (ja) | 2019-01-09 |
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