CN206948169U - A kind of frequency converter and its power cell - Google Patents

A kind of frequency converter and its power cell Download PDF

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Publication number
CN206948169U
CN206948169U CN201720392884.9U CN201720392884U CN206948169U CN 206948169 U CN206948169 U CN 206948169U CN 201720392884 U CN201720392884 U CN 201720392884U CN 206948169 U CN206948169 U CN 206948169U
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China
Prior art keywords
power
plate
pcc
frequency converter
power cell
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CN201720392884.9U
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Chinese (zh)
Inventor
许佩佩
曹叶楠
刘强
孔浩源
张浏骏
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SHANGHAI SIGRINER CO Ltd
SHANGHAI STEP ELECTRIC Corp
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SHANGHAI SIGRINER CO Ltd
SHANGHAI STEP ELECTRIC Corp
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Priority to CN201720392884.9U priority Critical patent/CN206948169U/en
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Abstract

Electrical engineering field is the utility model is related to, discloses a kind of frequency converter and its power cell.In the utility model, the power cell of frequency converter includes:Capacitance component, (PCC) power, board component and resistor assembly;Capacitance component includes electrochemical capacitor, capacitance bracket and capacitor bus-bar, wherein, electrochemical capacitor is installed on capacitance bracket, and the electrochemical capacitor is connected with the capacitor bus-bar;The (PCC) power includes liquid cooling plate, power model and input copper bar, and power model electrically connects with input copper bar, and power model is parallel with the liquid cooling plate and is fitted on the first surface of the liquid cooling plate;Board component includes driving plate, and the driving plate is used for the conducting of driving power module, wherein, the driving electric energy of the board component obtains from the capacitor bus-bar cabling power taking.Present embodiment, the radiating to power cell is enhanced, simultaneously so that the function distinguishing of power cell is obvious, beneficial to installation and safeguards.

Description

A kind of frequency converter and its power cell
Technical field
Electrical engineering field is the utility model is related to, more particularly to a kind of frequency converter and its power cell.
Background technology
With the continuous development of Power Electronic Technique, the use to frequency converter is also more next extensive, the power in frequency converter Unit is the core component for realizing rectification or inversion function, and the performance of power cell directly affects the performance of frequency converter.And radiate It is a key factor for influenceing power cell performance, power device caused heat at work, the temperature of device will be caused The maximum temperature of device permission is increased to over, so as to cause device performance to reduce or even damage.Therefore, power in frequency converter is lifted The heat dispersion of unit is very necessary.
Inventor has found during the present invention is realized, at present usually using the side of forced air cooling radiating in frequency converter Formula is radiated to power cell, but the radiating mode of forced air cooling is used ring by radiator area, environment temperature, frequency converter Border, fan and many limitations of noise, for example, wind-cooling heat dissipating use needs amount of dust very little, clean environment;It is and air-cooled scattered Heat can not meet the cooling requirements of the power cell of big-power transducer, for solve the influence radiated to frequency converter of environment and The heat dissipation problem of the power cell of big-power transducer, occur the mode of water-cooling at present, still, this water-filled radiator Water cooling tube assembly be installed in power cell, be wrapped in high pressure Support Capacitor surrounding, exist because of pipeline aging and caused by reveal The risk of device is damaged, meanwhile, water-cooling needs to install heat-rejecting exchanger in power cell bottom, and overall frequency converter needs Supporting cooling recirculation system so that radiator volume is big, processed complex, and cost is high.Current power cell generally use stacking The mode of installation, stacking number are more so that function distinguishing unobvious, are unfavorable for installing and safeguard.
Utility model content
The purpose of this utility model is to provide a kind of frequency converter and its power cell so that enhances to power cell Radiating, simultaneously so that the function distinguishing of power cell is obvious, beneficial to installation and safeguards.
In order to solve the above technical problems, embodiment of the present utility model provides a kind of power cell of frequency converter, bag Include:Capacitance component, (PCC) power, board component and resistor assembly;The capacitance component includes electrochemical capacitor, capacitance bracket and electric capacity Busbar, wherein, the electrochemical capacitor is installed on the capacitance bracket, and the electrochemical capacitor is connected with the capacitor bus-bar;The power packages Part includes liquid cooling plate, power model and input copper bar, and the power model electrically connects with the input copper bar, and the power model and The liquid cooling plate is parallel and is fitted on the first surface of the liquid cooling plate;The board component includes driving plate, and the driving plate is used to drive The conducting of the power model is moved, wherein, the driving electric energy of the board component obtains from the capacitor bus-bar cabling power taking;The resistance group Part is installed on the second surface of the liquid cooling plate, and the second surface is parallel with the first surface relative, wherein, resistor assembly difference Electrically connected with the capacitance component and the board component.
It is of the present utility model that embodiment further provides a kind of frequency converter, including above power cell.
The utility model embodiment in terms of existing technologies, by the way that transducer power unit is divided into capacitance group Part, (PCC) power, board component and resistor assembly so that the function distinguishing of transducer power unit is obvious, beneficial to installation and dimension Shield.Because function distinguishing is obvious, the more conducively extension of power;Because electrochemical capacitor is installed on capacitance bracket in capacitance component, And electrochemical capacitor is connected with capacitor bus-bar, therefore, can be achieved to the power cell of different capacity by changing capacitance bracket The flexible configuration of electrochemical capacitor device count amount, enhance flexibly matching somebody with somebody for the electrochemical capacitor in the power cell to different capacity demand Put.Power model is parallel with liquid cooling plate in (PCC) power and is fitted on the first surface of liquid cooling plate, and resistor assembly is installed on this On the second surface of liquid cooling plate, because resistance and power model produce heat height in working condition, pass through the patch with liquid cooling plate Closing so that device contacts with liquid cooling plate, the radiating of faster devices, meanwhile, the installation power module on two surfaces of liquid cooling plate And resistor assembly, the thermolysis of liquid cooling plate is taken full advantage of, has saved space, reduces the volume of power cell.
In addition, also including division board, for isolating the capacitance component and the (PCC) power, make the capacitance component and the power Component is each in two independent air channels.By using division board so that capacitance component and (PCC) power are each in two In individual independent air channel, avoid capacitance component and produce thermal coupling in working condition with (PCC) power, meanwhile, capacitance component and work( Rate component is respectively at independent air channel, strengthens the radiating of capacitance component and (PCC) power.
In addition, division board is epoxy plate.Epoxy plate has preferable heat resistance and dielectric properties, can be effectively isolated heating Capacitance component and (PCC) power.
In addition, liquid cooling plate includes:Heat sink and the cold pipe of liquid;The cold pipe of the liquid is arranged on the front of heat sink with multiple tracks U-shaped, The front of the heat sink is flat surface.The cold pipe of liquid is installed with multiple tracks U-shaped on heat sink so that heat sink and the cold pipe of liquid it Between contact area it is maximum, strengthen the heat-sinking capability of heat sink, while the front of heat sink is flat surface, strengthens other devices Contact area between heat sink, further enhance the heat-sinking capability of liquid cooling plate.
In addition, (PCC) power also includes (PCC) power shell;The (PCC) power shell include backboard, side panel, top and Bottom;The backboard is connected with the liquid cooling plate reverse side, for installing the board component;Side panel phase parallel with the capacitance bracket It is right, and combine to form cavity with the capacitance bracket;The (PCC) power also includes:First axial flow blower, first axial flow blower peace It is corresponding with the (PCC) power mounted in the top of the (PCC) power shell, the radiating for the (PCC) power;In the capacitance component also Including:Second axial flow blower, the bottom that second axial flow blower is arranged on the (PCC) power shell is corresponding with the capacitance component, uses In the radiating of the capacitance component.By (PCC) power shell, board component is separated with other assemblies so that functional areas are clearly demarcated It is aobvious, while axial flow blower is installed in the top and bottom of (PCC) power shell, it further enhancing (PCC) power and capacitance component Heat-sinking capability.
In addition, also include:Cabinet;The cabinet includes first side plate and second side plate, the first side plate and the electricity It is parallel relative to hold component, the (PCC) power, the second side plate is relative with the resistor assembly, board member parallel;First side Panel, capacitance bracket, the (PCC) power shell, second side plate combine successively.By cabinet, by each component bag in power cell It is contained in cabinet, reduces influence of the dust to power cell.
In addition, liquid cooling plate also includes:Copper outside nut swivel joint;It is cold that the copper outside nut swivel joint is welded in the liquid Pipe imports and exports position, and the copper outside nut swivel joint is extended to outside the cabinet, and the heat sink and the cold pipe of the liquid are located at cabinet It is interior.By increasing copper outside nut swivel joint to liquid cooling plate so that the cold pipe of liquid is kept completely separate with electrical part, is prevented in the cold pipe of liquid Cool down working medium and reveal influence to electrical part, meanwhile, by copper outside nut swivel joint quickly can be connected with client and It need not be welded so that connection is simpler.
In addition, board component also includes:Power panel, for providing the driving electric energy needed for the axial flow blower.
In addition, input copper bar is parallel with the power model and placement direction is consistent.It is parallel with the power model to input copper bar And placement direction is consistent, current-carrying capacity height and the more conducively radiating of copper bar ensure that.
In addition, input copper bar uses three-phase input, including at least 3 copper bars.Inputted using more copper bars, enhancing input copper The current capacity of row.
In addition, also include bottom bracket;At least sky is in two surfaces to the bottom bracket, the inlet wire for the (PCC) power And radiating.The surface of bottom bracket at least two is sky so that (PCC) power inlet wire is convenient, while strengthens the heat radiation energy of power cell Power.
In addition, the first side plate of cabinet is corresponding with the electrochemical capacitor, and the first side plate is provided with the first air vent;Should The second side plate of cabinet position staggeredly parallel with the first air vent in first side plate is provided with the second air vent.By The first side plate and second side plate of cabinet set air vent, strengthen the heat-sinking capability of power cell, while the first air vent It is parallel with the position of the second air vent to interlock so that in expanded capacitor component, it is ensured that electrochemical capacitor has corresponding enough area Air vent, it is ensured that power cell extension when can also have stronger heat-sinking capability.
In addition, the second side plate disposed at air vent of cabinet sets air channel barrier.Isolate electrochemical capacitor and board component, prevent Influence of the heat caused by electrochemical capacitor to board.
In addition, the refrigerant in the cold pipe of liquid is HFA 134a.The coefficient of heat transfer of the refrigerant is high, radiating effect It is good.
In addition, capacitor bus-bar uses two-layer laminate structure.Capacitor bus-bar uses two-layer laminate structure, improves capacitor bus-bar Current capacity.
In addition, setting looping pit on backboard, the looping pit includes first annular hole and the second looping pit;Use in first annular hole In from the capacitor bus-bar cabling power taking;Second looping pit is connected cabling for the driving plate with the power model.Pass through ring Shape hole, beneficial to the connection between each component.
Brief description of the drawings
Fig. 1 is the structure of capacitance component in the power cell according to a kind of frequency converter of the utility model first embodiment Schematic diagram;
Fig. 2 is the structure of capacitor bus-bar in the power cell according to a kind of frequency converter of the utility model first embodiment Schematic diagram;
Fig. 3 is the structure according to a kind of (PCC) power of the power cell of frequency converter of the utility model first embodiment Schematic diagram;
Fig. 4 is (PCC) power and electric capacity in the power cell according to a kind of frequency converter of the utility model first embodiment The structural representation of component;
Fig. 5 is board component and resistance in the power cell according to a kind of frequency converter of the utility model first embodiment The structural representation of component;
Fig. 6 is the structure of board component in the power cell according to a kind of frequency converter of the utility model first embodiment Schematic diagram;
Fig. 7 is the structural representation according to a kind of cabinet of the power cell of frequency converter of the utility model first embodiment Figure;
Fig. 8 is illustrated according to a kind of detonation configuration of the power cell of frequency converter of the utility model first embodiment Figure;
Fig. 9 is rotated according to a kind of copper outside nut of the power cell of frequency converter of the utility model second embodiment The structural representation of joint;
Figure 10 is the structural representation according to a kind of power cell of frequency converter of the utility model second embodiment;
Figure 11 is illustrated according to a kind of detonation configuration of the power cell of frequency converter of the utility model second embodiment Figure.
Embodiment
It is new to this practicality below in conjunction with accompanying drawing to make the purpose of this utility model, technical scheme and advantage clearer Each embodiment of type is explained in detail.It is however, it will be understood by those skilled in the art that each in the utility model In embodiment, in order that reader more fully understands the application and proposes many ins and outs.But even if without these skills Art details and many variations based on following embodiment and modification, it can also realize that each claim of the application is required and protect The technical scheme of shield.
First embodiment of the present utility model is related to a kind of power cell of frequency converter.As shown in Figures 1 to 8, this reality Included but is not limited to the power cell of new frequency converter:Capacitance component 101, (PCC) power 102, board component 103 and electricity Hinder component 104.
It is the structural representation of capacitance component 101 as shown in Figure 1, includes but is not limited to:Electrochemical capacitor 1011, capacitance bracket 1012 and capacitor bus-bar (electric capacity exports positive copper bar 10131, the negative copper bar 10132 of electric capacity output and middle copper bar 10133, such as Fig. 2 institutes Show), electrochemical capacitor 1011 is installed on capacitance bracket 1012, and electrochemical capacitor 1011 is connected with capacitor bus-bar.
Specifically, the quantity of electrochemical capacitor 1011 can determine according to the actual requirements, such as 710kW power frequency conversion Device, using 16 electrochemical capacitors, 630kW power inverter uses 14 electrochemical capacitors.The concrete structure of capacitance component 101 is such as Shown in Fig. 1, electrochemical capacitor 1011 is arranged on capacitance bracket 1012 in a manner of two groups of longitudinal arrangements;During installation, by electrolysis electricity Appearance 1011 and electric capacity bottom insulation paper are arranged on capacitance bracket 1012, and pass through locating cover pretension.The structure of capacitor bus-bar is such as Shown in Fig. 2, capacitor bus-bar includes electric capacity and exports positive copper bar 10131, the negative copper bar 10132 of electric capacity output and middle copper bar 10133. As shown in Fig. 2 it is that electric capacity exports positive copper bar 10131, the negative copper bar 10132 of electric capacity output and middle copper bar successively from top to bottom 10133, wherein, electric capacity exports the positive negative copper bar 10132 of copper bar 10131 and electric capacity output and is placed on electrochemical capacitor 1011, middle Copper bar contacts with the electrochemical capacitor 1011 of two groups of longitudinal arrangements, is isolated between three copper bars by insulating paper.Pass through middle copper bar 10133 are serially connected both positive and negative polarity corresponding to two groups of electrochemical capacitors in parallel.
It is noted that capacitor bus-bar uses the structure of two-layer laminate, increase the current-carrying capacity of capacitor bus-bar, for example, electric Hold and export the positive negative copper bar of copper bar and electric capacity output each using 2 layers of 2mm copper bar laminated construction.
The structure of (PCC) power 102 is as shown in figure 3, (PCC) power 102 includes but is not limited to:Liquid cooling plate 1021, power mould Block 1022 and input copper bar 1023, power model 1022 electrically connects with input copper bar 1023, and the power model 1022 and liquid Cold drawing 1021 is parallel and is fitted on the first surface of the liquid cooling plate 1021.
Specifically, liquid cooling plate 1021 includes:Heat sink 10211 and the cold pipe 10212 of liquid, as shown in figure 3, heat sink 10211 be the good metal of heat conduction, for example, heat sink is aluminum plate, it is smooth that heat sink 10211, which divides for tow sides, front, Surface.The cold pipe 10212 of liquid is arranged on the front of heat sink with multiple tracks U-shaped, and the cold pipe 10212 of liquid is similarly the good gold of heat conduction Category, for example, being made of copper material.Cooling working medium in the cold pipe of liquid can be that refrigerant is HFA 134a (letter Claiming " R134a ") R134a has the advantages that nonflammable, nontoxic, non-stimulated, non-corrosiveness, meanwhile, its coefficient of heat transfer is high, radiating Effect is good.Cool down working medium in present embodiment to illustrate by taking R134a as an example, but the utility model does not limit working medium to cold System.
The quantity of power model 1022 is 6,6 power model longitudinal arrangements, and fitting parallel with liquid cooling plate 1021 On the first surface of liquid cooling plate 1021, as shown in Figure 3.Wherein, first surface is surface, power model 1022 where the cold pipe of liquid For power of controlled silicon module.Meanwhile power model 1022 electrically connects with input copper bar 1023, input copper bar 1023 is defeated using three-phase Enter, including at least 3 copper bars, in order to increase the current-carrying capacity of input copper bar 1023,6 copper bars are used in present embodiment as defeated Enter copper bar, input copper bar 1023 is parallel with power model 1022 and placement direction is consistent, placed longitudinally, as shown in Figure 4.
(PCC) power 102 also includes (PCC) power shell, and (PCC) power shell includes but is not limited to:Backboard 10241, side Plate 10242, top 10243 and bottom 10244;Wherein, backboard 10241, side panel 10242 and top 10243 are by a metal plate What gold was converted into, backboard 10241 (referring to Fig. 5) is connected with the reverse side of liquid cooling plate 1021, and side panel 10242 is parallel with capacitance bracket 1012 Relatively, and with capacitance bracket 1012 combine to form cavity, concrete structure is as shown in Fig. 4 to Fig. 5.
Specifically, liquid cooling plate 1021 is arranged on backboard 10241 so that the reverse side of liquid cooling plate 1021 and backboard 10241 Connect (as shown in Figure 5);(PCC) power shell 1024 combines to form cavity with capacitance bracket 1012, protects the device in cavity.
(PCC) power 102 also includes:First axial flow blower 1025, the first axial flow blower 1025 are installed on (PCC) power shell On 1024 top 10243 and corresponding with (PCC) power 102, for the radiating of the (PCC) power 102, Fig. 4 is capacitance component 101 With the scheme of installation of (PCC) power 102.Now, (PCC) power 102 completes installation.
It is noted that capacitance component 101 also includes:Second axial flow blower 1014, the second axial flow blower 1014 are installed It is corresponding with capacitance component 101 in the bottom 10244 of (PCC) power shell 1024, for the radiating of capacitance component 101, such as Fig. 4 institutes Show.Also include division board 105 among capacitance component 101 and (PCC) power 102, as shown in figure 4, being used for isolation capacitance component 101 with (PCC) power 102, make capacitance component 101 and power packages 102 each in two independent air channels.Wherein, isolate Plate has preferable heat resistance, for example, division board is epoxy plate.
Fig. 6 is the structural representation of board component 103, and board component 103 includes but is not limited to:Driving plate 1031, driving Plate 1031 is used for the conducting of driving power module 1022, wherein, the driving electric energy of board component 103 is from the cabling of capacitor bus-bar 1013 Power taking obtains;Board component 103 also includes:Power panel 1032, power panel 1032 are used to provide the driving electricity needed for axial flow blower Energy.
Specifically, the quantity of driving plate 1031 is illustrated exemplified by 2 pieces in present embodiment, two pieces of driving plates 1031 It is parallel with liquid cooling plate 1021 in a manner of longitudinal arrangement on the backboard 10241 of (PCC) power shell 1024, such as Fig. 5 institutes Show.Power panel 1032 is arranged on the backboard 10241 of (PCC) power shell 1024, and installation site is located at the first axial flow blower 1025 Under, the position on liquid cooling plate 1021.
In addition, as shown in figure 5, the electric energy of power panel 1032 is female from electric capacity by the first annular hole on backboard 10241 Drain line power taking acquisition, the position in first annular hole is located at the side of power panel 1032, so as to inserting for the power taking wire harness of power panel 1032 Connect conveniently.Driving plate 1031 separates, therefore, driving plate 1031 and power with power model 1022 (referring to Fig. 8) by backboard 10241 Module 1022 is attached cabling by the second looping pit, and the quantity of the second looping pit is consistent with the quantity of driving plate 1031, this In embodiment, the second looping pit is 2, positioned at two pieces of sides of driving plate 1031.
Resistor assembly 104, as shown in figure 5, the second surface of liquid cooling plate 10241 is installed on, wherein, liquid cooling plate 10241 Second surface is parallel with first surface relative, and resistor assembly 104 electrically connects with capacitance component 101 and board component 102 respectively.
Specifically, resistor assembly 104 includes equalizing resistance 1041 and charging resistor 1042, wherein, equalizing resistance 1041 Quantity be not limited, it is, for example, possible to use 2 equalizing resistances, can also use 4 equalizing resistances.With 4 in present embodiment Illustrated exemplified by individual equalizing resistance, the quantity of equalizing resistance 1041 is 4, is effectively avoided because of indivedual equalizing resistances 1041 Internal resistance difference cause the situation of circuit unbalanced-voltage-division.The quantity of charging resistor 1042 is 6, equalizing resistance 1041 and charging electricity Resistance 1042 is arranged on the second surface of liquid cooling plate 10241 in a manner of longitudinal arrangement, as shown in figure 5, equalizing resistance 1041 and electricity Solution electric capacity 1011 is connected, at the same time it can also carry out the connection of equalizing resistance 1041 and electrochemical capacitor 1011 by the second looping pit Cabling.Charging resistor 1042 concatenates with power model 1022.
In addition, the power cell of frequency converter also includes cabinet.Cabinet is as shown in fig. 7, comprises first side 1061 and second Side panel 1062.Fig. 8 is the Structure explosion diagram of transducer power unit, first side plate 1061 and capacitance component 101, power packages Part 102 is parallel relative, and second side plate 1062 is parallel with resistor assembly 104 and board component 103 relative, first side plate 1061st, capacitance bracket 1012, (PCC) power shell 1024, second side plate 1062 combine successively, and transducer power unit is last Combination is as shown in Figure 7.
In terms of existing technologies, the power cell for the frequency converter that present embodiment provides, due to electricity in capacitance component Solution electric capacity is installed on capacitance bracket, and electrochemical capacitor is connected with capacitor bus-bar, therefore, can be achieved by changing capacitance bracket To the flexible configuration of the electrochemical capacitor device count amount of the power cell of different capacity, the power list to different capacity demand is enhanced The flexible configuration of electrochemical capacitor in member.Power model is parallel with liquid cooling plate in (PCC) power and is fitted in the first table of liquid cooling plate On face, resistor assembly is installed on the second surface of the liquid cooling plate, because resistance and power model produce heat in working condition Amount is high, by being bonded with liquid cooling plate so that and device contacts with liquid cooling plate, the radiating of faster devices, meanwhile, the radiating of liquid cooling plate Plate front is flat surface, enhances power model and the direct contact area of heat sink, accelerates the radiating of power model;In liquid Installation power module and resistor assembly on two surfaces of cold drawing, take full advantage of the thermolysis of liquid cooling plate, have saved space, Reduce the volume of power cell.Division board is used between capacitance component and (PCC) power so that capacitance component and power packages Part is respectively in independent air channel, is avoided capacitance component and is produced thermal coupling with (PCC) power, influences the work of power cell Efficiency, meanwhile, single air channel is more favorable for the radiating of capacitance component and (PCC) power.The use of (PCC) power shell, separation Capacitance component, (PCC) power and board component, by the way that transducer power unit is divided into capacitance component, (PCC) power, board Components apart so that the function distinguishing of transducer power unit is obvious, beneficial to installation and safeguards, while on (PCC) power shell Axial flow blower is installed, further enhances the radiating of capacitance component and (PCC) power.
Second embodiment of the present utility model is related to a kind of power cell of frequency converter.Second embodiment is first real The further improvement of mode is applied, is mainly theed improvement is that:In the utility model second embodiment, liquid cooling plate also includes copper Outside nut swivel joint 10213 processed, the copper outside nut swivel joint 10213 are welded in the cold pipe 10212 of liquid and import and export position, and Extend to outside cabinet;Power cell also includes bottom bracket, inlet wire and radiating for (PCC) power.Concrete structure such as Fig. 9 institutes Show
Specifically, the cold pipe 10212 of liquid has a cooling working medium import, a cooling sender property outlet, the rotation of copper outside nut Adapter is two, and the cooling working medium entrance location in the cold pipe 10212 of liquid and cooling working medium outlet port, and copper is respectively welded Outside nut swivel joint 10213 processed is extended to outside cabinet, can scene and client by copper outside nut swivel joint 10213 It is attached, without Site Welding.As shown in figure 9, cooling working medium in the cold pipe of liquid by the way of bottom in and top out, prevent cold But bubble accumulation impacts to liquid cooling plate radiating in working medium.
Bottom bracket 107, at least two surfaces of bottom bracket 107 are sky, for (PCC) power 102 inlet wire and dissipate Heat, transducer power unit are as shown in Figure 10.
Specifically, bottom bracket 107 is located at the lower section of cabinet 106, parallel with the first axial flow blower relative, cabinet 106 It is placed on bottom bracket 107, present embodiment does not limit the pattern of bottom bracket, using bottom bracket as length in present embodiment Illustrated exemplified by cube.The surface of bottom bracket 107 at least two is sky, wherein, two surfaces are the surface contacted with cabinet Relative surface parallel with the surface.In present embodiment, six surfaces of bottom bracket 107 are all sky, are further facilitated (PCC) power inlet wire and radiating, bottom bracket 107 is by base screw by capacitance component, (PCC) power, board component and resistance Component is fixed in cabinet.
In addition, in order to further strengthen the heat-sinking capability of power cell, it is provided with the first side plate 1061 of cabinet 106 First air vent 10611, the first air vent 10611 is parallel and relative with electrochemical capacitor 1011, and second side plate 1062 is provided with the Two air vents 10621, the second ventilating opening 10621 be located at it is parallel with the first air vent 10611 in first side plate 1061 staggeredly Position, as shown in Figure 10.Meanwhile exist respectively in the top and bottom of second side plate relative position parallel with electrochemical capacitor Exhaust vent is set, further strengthens the heat-sinking capability of power cell.In the position of the second air vent 10621 of second side plate 1062 Air channel deep bead 10622 is set, prevents the hot-air of the second air vent 10621 from causing heat radiation to board component 103, causes plate Card temperature is too high.Figure 11 is the explosive view of the power cell structure of frequency converter.
The power cell for the frequency converter that present embodiment provides, outside the entrance end welding copper of the cold pipe of liquid of liquid cooling plate Screw swivel joint, and the copper outside nut swivel joint is extended to outside cabinet, the mode without welding is connected with client, So that it is simpler with the connection of client, simultaneously as copper outside nut swivel joint is located at outside cabinet so that cooling working medium It is kept completely separate with electrical part, is not susceptible to leak, influence the performance of the electrical part of power cell, improves the safety of power cell Property.Increase bottom bracket, facilitate inlet wire and the radiating of (PCC) power, meanwhile, it is the placement of power cell of being more convenient in dismounting.
The embodiment of the utility model the 3rd is related to a kind of power inverter, including first embodiment or the second embodiment party Power cell in formula, the quantity of power cell can be extended according to being actually needed, you can there was only a power cell, Or multiple power cells are in parallel.
The power inverter that present embodiment provides, improve the heat-sinking capability of frequency converter so that frequency converter is at work It is more stable.
It will be understood by those skilled in the art that the respective embodiments described above are to realize specific implementation of the present utility model Example, and in actual applications, can to it, various changes can be made in the form and details, without departing from spirit of the present utility model And scope.

Claims (17)

  1. A kind of 1. power cell of frequency converter, it is characterised in that including:Capacitance component, (PCC) power, board component and resistance group Part;
    The capacitance component includes electrochemical capacitor, capacitance bracket and capacitor bus-bar, wherein, the electrochemical capacitor is installed on the electricity Hold on support, and the electrochemical capacitor is connected with the capacitor bus-bar;
    The (PCC) power includes liquid cooling plate, power model and input copper bar, and the power model is electrically connected with the input copper bar Connect, and the power model is parallel with the liquid cooling plate and is fitted on the first surface of the liquid cooling plate;
    The board component includes driving plate, and the driving plate is used for the conducting for driving the power model, wherein, the board The driving electric energy of component obtains from the capacitor bus-bar cabling power taking;
    The resistor assembly is installed on the second surface of the liquid cooling plate, second surface phase parallel with the first surface It is right, wherein, the resistor assembly electrically connects with the capacitance component and the board component respectively.
  2. 2. according to the power cell of the frequency converter described in claim 1, it is characterised in that also including division board, for isolating The capacitance component and the (PCC) power, make the capacitance component and the (PCC) power each in two independent air channels In.
  3. 3. according to the power cell of the frequency converter described in claim 2, it is characterised in that the division board is epoxy plate.
  4. 4. according to the power cell of the frequency converter described in claim 1 or 2, it is characterised in that the liquid cooling plate includes:Radiating Plate and the cold pipe of liquid;
    The cold pipe of liquid is arranged on the front of heat sink with multiple tracks U-shaped, and the front of the heat sink is flat surface.
  5. 5. according to the power cell of the frequency converter described in claim 4, it is characterised in that the (PCC) power also includes power Package shell;
    The (PCC) power shell includes backboard, side panel, top and bottom;
    The backboard is connected with the liquid cooling plate reverse side, for installing the board component;
    The side panel is parallel with the capacitance bracket relative, and combines to form cavity with the capacitance bracket;
    The (PCC) power also includes:First axial flow blower, first axial flow blower are arranged on the (PCC) power shell Top is corresponding with the (PCC) power, the radiating for the (PCC) power;
    Also include in the capacitance component:Second axial flow blower, second axial flow blower are arranged on the (PCC) power shell Bottom it is corresponding with the capacitance component, the radiating for the capacitance component.
  6. 6. according to the power cell of the frequency converter described in claim 5, it is characterised in that also include:Cabinet;
    The cabinet includes first side plate and second side plate, the first side plate and the capacitance component, the power Member parallel is relative, and the second side plate is relative with the resistor assembly, board member parallel;
    The first side plate, the capacitance bracket, the (PCC) power shell, the second side plate combine successively.
  7. 7. according to the power cell of the frequency converter described in claim 6, it is characterised in that the liquid cooling plate also includes:Copper Outside nut swivel joint;
    The copper outside nut swivel joint is welded in the cold pipe inlet and outlet position of the liquid, and the copper outside nut swivel joint Extend to outside the cabinet, the heat sink and the cold pipe of the liquid are located in the cabinet.
  8. 8. the power cell of frequency converter according to claim 5, it is characterised in that the board component also includes:Power supply Plate, for providing the driving electric energy needed for the axial flow blower.
  9. 9. according to the power cell of the frequency converter described in claim 1, it is characterised in that the input copper bar and the power Module parallel and placement direction is consistent.
  10. 10. according to the power cell of the frequency converter described in claim 9, it is characterised in that the input copper bar uses three-phase Input, including at least 3 copper bars.
  11. 11. according to the power cell of the frequency converter described in claim 1, it is characterised in that also including bottom bracket;
    At least sky is in two surfaces to the bottom bracket, inlet wire and radiating for the (PCC) power.
  12. 12. according to the power cell of the frequency converter described in claim 6, it is characterised in that the first side plate of the cabinet It is corresponding with the electrochemical capacitor, and the first side plate is provided with the first air vent;
    The second side plate of cabinet position staggeredly parallel with the first air vent in first side plate is provided with the second ventilation Hole.
  13. 13. according to the power cell of the frequency converter described in claim 6, it is characterised in that the second side plate of the cabinet Disposed at air vent sets air channel barrier.
  14. 14. according to the power cell of the frequency converter described in claim 4, it is characterised in that the refrigerant in the cold pipe of liquid For HFA 134a.
  15. 15. according to the power cell of the frequency converter described in claim 1, it is characterised in that the capacitor bus-bar uses two layers Stepped construction.
  16. 16. according to the power cell of the frequency converter described in claim 8, it is characterised in that looping pit is set on the backboard, The looping pit includes first annular hole and the second looping pit;
    The first annular hole is used for from the capacitor bus-bar cabling power taking;
    Second looping pit is connected cabling for the driving plate with the power model.
  17. 17. a kind of power inverter, it is characterised in that including the power cell described in any one of claim 1 to 16.
CN201720392884.9U 2017-04-14 2017-04-14 A kind of frequency converter and its power cell Active CN206948169U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110112890A (en) * 2018-01-31 2019-08-09 株洲中车时代电气股份有限公司 A kind of excessive phase current transformer of train
CN110336452A (en) * 2018-03-30 2019-10-15 株洲中车时代电气股份有限公司 A kind of current transformer power modules
CN111049361A (en) * 2020-01-02 2020-04-21 中车青岛四方车辆研究所有限公司 Three-level power module system device and charging system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110112890A (en) * 2018-01-31 2019-08-09 株洲中车时代电气股份有限公司 A kind of excessive phase current transformer of train
CN110336452A (en) * 2018-03-30 2019-10-15 株洲中车时代电气股份有限公司 A kind of current transformer power modules
CN111049361A (en) * 2020-01-02 2020-04-21 中车青岛四方车辆研究所有限公司 Three-level power module system device and charging system

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