CN207743846U - Frequency converter - Google Patents
Frequency converter Download PDFInfo
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- CN207743846U CN207743846U CN201721097452.1U CN201721097452U CN207743846U CN 207743846 U CN207743846 U CN 207743846U CN 201721097452 U CN201721097452 U CN 201721097452U CN 207743846 U CN207743846 U CN 207743846U
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- frequency converter
- bipolar transistor
- insulated gate
- gate bipolar
- heat
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Abstract
The utility model provides a kind of frequency converter, the frequency converter includes frequency converter controller and converter module, the converter module includes the electrical equipment of substrate and setting on the substrate, the electrical equipment includes at least insulated gate bipolar transistor module, and the input terminal of the insulated gate bipolar transistor module, which is connected with reversal connection, prevents circuit.In the above-mentioned technical solutions, circuit is prevented by the upper reversal connection of input terminal connection in insulated gate bipolar transistor module, when the input terminal of insulated gate bipolar transistor module is reversed with power supply, reversal connection prevents circuit from preventing circuit turn-on, to avoid the input terminal Miswire due to insulated gate bipolar transistor module, lead to the impaired situation of frequency converter, improves safety when frequency converter uses.
Description
Technical field
The utility model is related to arrive technical field of electrical equipment more particularly to a kind of frequency converter.
Background technology
Frequency converter (Variable-frequency Drive, VFD) is to apply converter technique and microelectric technique, by changing
Become the mode of motor working power frequency to control the electric control appliance of ac motor.Frequency converter is mainly by rectification (exchange
Inversion of direct current), filtering, inversion (direct current become exchange), brake unit, driving unit, the compositions such as detection unit microprocessing unit.Frequency conversion
IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) module is cut-off device close to the inner portion
The voltage and frequency of out-put supply are adjusted, according to the actual needs of motor provides its required supply voltage, Jin Erda
To energy saving, speed governing purpose, in addition, frequency converter also has many defencive functions, such as overcurrent, overvoltage, overload protection.With
The continuous improvement of industrial automatization, frequency converter have obtained very extensive application.
Therefore, the operational safety for how ensureing frequency converter is a major issue needed to be considered.
Utility model content
The utility model provides a kind of frequency converter, to improve the safety of frequency converter when in use.
The utility model provides a kind of frequency converter, which includes frequency converter controller and converter module, described
Converter module includes the electrical equipment of substrate and setting on the substrate, and it is double that the electrical equipment includes at least insulated gate
Bipolar transistor module, the input terminal of the insulated gate bipolar transistor module, which is connected with reversal connection, prevents circuit.
In the above-mentioned technical solutions, electricity is prevented by the upper reversal connection of input terminal connection in insulated gate bipolar transistor module
Road, when the input terminal of insulated gate bipolar transistor module is reversed with power supply, reversal connection prevents circuit from preventing circuit turn-on, to
The input terminal Miswire due to insulated gate bipolar transistor module is avoided, leads to the impaired situation of frequency converter, improves
Safety when frequency converter uses.
In a specific embodiment, it is diode that the reversal connection, which prevents circuit,.Pass through the current lead-through of diode
Directionality realize the effect for preventing reversal connection.
In a specific embodiment, the anode of the anode connection direct current input of the diode, cathode connects institute
State the electrode input end of insulated gate bipolar transistor module；Or
The cathode of the cathode connection direct current input of the diode, anode connect the insulated gate bipolar transistor module
Negative input.I.e. diode can be arranged in different positions, you can be arranged in insulated gate bipolar transistor module
Electrode input end, can also be arranged in negative input.
Further include the first capacitance in a specific embodiment, first capacitance connection is double in the insulated gate
Between the electrode input end of bipolar transistor module and the negative input of the insulated gate bipolar transistor module.By setting
The first capacitance set protects power supply, avoids rush of current power supply.
Further include switching circuit and voltage detecting circuit in a specific embodiment, the switching circuit and institute
Stating reversal connection prevents circuit in parallel, the voltage detecting circuit from detecting the direct current input electricity of the insulated gate bipolar transistor module
Pressure, the frequency converter controller control the switching circuit when the DC input voitage reaches setting value and are closed.By setting
Switching circuit, voltage detecting circuit and the frequency converter controller set realize the short circuit that circuit is prevented to reversal connection, so that
When frequency converter connects decelerating through motor, reverse current can give power source charges.
In a specific embodiment, the switching circuit includes relay, controllable diode, triode or field effect
Ying Guan.It is used as switching circuit by different devices, realizes the short circuit to diode.
Further include heat sink in a specific embodiment, there are at least two installation regions on the heat sink,
One of installation region is provided with the insulated gate bipolar transistor module, other installation regions are that other electric appliances are arranged
The installation region of module.
In the above-described embodiment, using at least two installation regions are arranged on the heat sink of frequency converter, so that
When assembling forming apparatus with other electrical appliance modules, other electrical appliance modules may be mounted on the heat sink of frequency converter frequency converter,
To reduce the heat sink number that assembling equipment uses, assembling device structure is simplified, and the occupancy for reducing assembling equipment is empty
Between.
Further include multiple second capacitances, the insulated gate bipolar transistor module in a specific embodiment
It is arranged in the substrate towards the one side of the heat sink and is contacted with the heat sink；The multiple second capacitance is arranged in institute
State the one side that substrate deviates from the insulated gate bipolar transistor.By the way that insulated gate bipolar transistor module and heat sink is straight
Contact, to effectively improve the effect of heat dissipation.
In a specific embodiment, the converter module further includes heat-conducting plate, and the heat-conducting plate is dissipated with described
Hot plate is fixedly connected, and the substrate is fixedly connected with the heat-conducting plate, and insulated gate bipolar transistor module setting exists
The substrate towards the heat-conducting plate one side and contacted with the heat-conducting plate.Heat dissipation effect is improved by the heat-conducting plate of setting.
In a specific embodiment, the heat sink is the shell of motor；Alternatively, the heat sink dissipates for liquid cooling
Hot plate.By regarding the shell of motor as heat sink, electrical appliance module is further incorporated, the occupancy for reducing assembling equipment is empty
Between.Or radiated by liquid-cooling heat radiation plate, it can effectively improve heat dissipation effect.
In a specific embodiment, radiating fin is provided on the heat sink.It is further to improve heat dissipation
Effect.
In a specific embodiment, other described electrical appliance modules include DC to DC converter.
In a specific embodiment, the input terminal of the insulated gate bipolar transistor module passes through the reversal connection
It prevents circuit and is connected with DC power supply.
Description of the drawings
Fig. 1 is the electrical schematic diagram of frequency converter in the prior art；
Fig. 2 is the electrical schematic diagram for the frequency converter that the utility model embodiment provides；
Fig. 3 is the electrical schematic diagram for another frequency converter that the utility model embodiment provides；
Pair when the frequency converter reversal connection that Fig. 4 and Fig. 5 provides for frequency converter in the prior art with the utility model embodiment
Than figure；
Fig. 6 is the electrical schematic diagram for another frequency converter that the utility model embodiment provides；
Fig. 7 is the structure diagram for the frequency converter that another embodiment of the utility model provides；
Fig. 8 is the side view for the converter module that one embodiment of the utility model provides；
Fig. 9 is the side view for the converter module that another embodiment of the utility model provides；
Figure 10 is the vertical view for the converter module that another embodiment of the utility model provides；
Figure 11 is the structural schematic diagram for the frequency converter that another embodiment of the utility model provides；
Figure 12 is the structural schematic diagram for the heat sink that the utility model embodiment provides；
Figure 13 is the structural schematic diagram for another heat sink that the utility model embodiment provides.
Reference numeral：
The first installation regions 10- heat sinks 11- the second installation regions 12-
13- thirds installation region 14- platy structure 15- heat-dissipating pipes
16- radiating fin 20- converter module 21- substrates
22- heat-conducting plate 221- removal hole 222- through-hole 23- capacitances
24- igbt module the first capacitances of 25-
26- reversal connections prevent circuit 27- voltage detecting circuits
28- relay 281- normal open switch 30- frequency converter controllers
40- motor 50- accumulator 60- DC to DC converters
Specific implementation mode
In order to facilitate the structure and operation principle of the frequency converter for understanding the utility model embodiment offer, it is situated between first below
Continue frequency converter in the prior art, as shown in Figure 1, frequency converter in the prior art is in connection, insulated gate bipolar is brilliant
The input terminal of body pipe die group 1 is connect with power supply, and output end is connect with motor.In the input of insulated gate bipolar transistor module 1
End is often directly attached by conducting wire or binding post when being connect with power supply, in connection, once there are the feelings of reversal connection
Condition, the i.e. cathode of the electrode input end of insulated gate bipolar transistor module 1 and power supply connect, and negative input and power supply
Anode connection, may result in power input to the current direction and insulated gate bipolar in insulated gate bipolar transistor module 1
Current direction when transistor module 1 works normally on the contrary, cause the damage of entire frequency converter, meanwhile, can also damage frequency converter
With the equipment of other electrical appliance modules composition.
In order to solve the above-mentioned technical problem, this application provides a kind of frequency converters, in insulated gate bipolar transistor module
Terminals increase reversal connection prevent circuit, to avoid reversed situation.The utility model reality is shown with specific reference to Fig. 1, Fig. 1
The structural schematic diagram of the frequency converter of example offer is provided.As seen from Figure 1, frequency converter provided by the embodiments of the present application includes frequency converter
Controller 30 and converter module 20, converter module 20 therein include the electrical member of substrate and setting on the substrate
Part, wherein the electrical equipment can be the element with different function, and still, in the present embodiment, which at least wraps
Insulated gate bipolar transistor module 24 is included, which can be referred to as IGBT (Insulated
Gate Bipolar Transistor, insulated gate bipolar transistor) module 24, in specific setting, the IGBT modules 24
Input terminal, which is connected with reversal connection, prevents circuit 26.The reversal connection prevents circuit 26 for avoiding the input terminal of IGBT modules 24 and power supply from existing
Occurs the case where reversal connection when connection.
In specific setting, it is the circuit of an one-way conduction which, which prevents circuit 26, i.e. the reversal connection prevents circuit 26
The direction that flows to that electric current prevents circuit 26 from setting along the reversal connection is only allowed to flow, in a specific embodiment, the reversal connection
It is a diode to prevent circuit 26, i.e., realizes the effect for preventing reversal connection by the directionality of the current lead-through of diode.And
And the diode can be arranged in different positions, can both connect with the electrode input end of IGBT modules 24 in specific setting
It connects, can also be connect with the negative input of IGBT modules 24, certainly, diode is specific to connect in installation position difference
Mode is also different.
With continued reference to Fig. 2, when diode is connect with the electrode input end of IGBT modules 24, the anode connection of diode is straight
The anode of input is flowed, cathode connects the electrode input end of IGBT modules 24；By the conducting direction of diode it is found that diode is led
Logical direction is the cathode that diode is directed toward from the anode of diode.Therefore, when the electrode input end of IGBT modules 24 is connected to directly
When flowing the anode of input, the circulating direction of electric current is identical as the conducting direction of diode, and therefore, direct current input can be with IGBT moulds
Group 24 normallies, when the electrode input end of IGBT modules 24 be connected to direct current input cathode when, due to sense of current with
The conducting direction of diode is different, at this point, diode is equivalent to circuitry cuts, complete circuit can not be formed, at this point, direct current
Input can not give IGBT modules 24 to power.To realize the protection to IGBT modules 24.As shown in figure 3, Fig. 3 shows that reversal connection is anti-
Only another mounting means of circuit 26, when diode is connect with the negative input of IGBT modules 24, the moon of diode
Pole connects the cathode of direct current input, and anode connects the negative input of IGBT modules 24.When using such set-up mode, equally
The protection to IGBT modules 24 can be played.
In addition, in specific connection, direct current input can be realized by different devices, both can be DC power supply,
Or the direct current transducer of AC to DC, it can apply in the present embodiment, in a specific embodiment,
The input terminal of IGBT modules 24 prevents circuit 26 by reversal connection by is connected with DC power supply.So as to provide stable DC
Stream.
It can be seen from the above description that different modes, which may be used, is arranged diode, reversal connection, which may be implemented, to be prevented
Effect, to provide protection to IGBT modules 24.In order to facilitate frequency converter provided in this embodiment is understood, below by existing skill
Frequency converter in art carries out comparison with the frequency converter that the utility model embodiment provides and illustrates.Comparison diagram 4 and Fig. 5, wherein
Fig. 4 is the case where frequency converter shown in FIG. 1 is when reversed in the prior art, as seen from Figure 4, frequency converter in the prior art
When reversed with power supply, due to being connected merely by conducting wire between power supply and IGBT modules 1 and power supply, in power supply and IGBT moulds
There is no any safeguard measure between group 1, when power supply is reversed, remain to be formed into a loop between power supply and IGBT modules 1, electric current can be with
Circulation, electric current is along the direction flowing such as the arrow meaning in Fig. 4, to damage IGBT modules 1.But implement in the utility model
In the frequency converter that example provides, as shown in figure 5, in DC power supply and IGBT 24 reversal connections of module, due to the direction of diode current flow
Property, when DC power supply is reversed, diode is equivalent to and disconnects the circuit between DC power supply and IGBT modules 24, i.e. the two
Between be therefore the state of an open circuit not will produce electric current, to being protected to IGBT modules 24.Avoid IGBT modules
24 input terminal is in Miswire, the case where being damaged to frequency converter, improves safety when frequency converter uses.
Further include the first capacitance 25 in frequency converter provided in this embodiment in addition, in order to preferably protect circuit, first
Capacitance 25 is connected between the electrode input end of IGBT modules 24 and the negative input of IGBT modules 24.In specific setting,
As shown in Fig. 2, first capacitance 25 is in parallel with IGBT modules 24, so as to can be to IGBT moulds by the filter action of capacitance
Group 24 is protected.
In a specific embodiment, when the output end of IGBT modules 24 connects motor, when motor speed is die-offed
When, will produce reverse current, in order to reduce the waste of the energy, can by reverse current to direct current transducer or DC power supply into
Row charging, so as to avoid the waste of electric energy.But since diode provided in this embodiment has the function of reversely preventing, because
This, when reverse current charges to direct current transducer or DC power supply, diode needs are short-circuited, in order to be able to be turned to direct current
Parallel operation or DC power supply charge, and therefore, one and diodes in parallel are provided in frequency converter provided in this embodiment
Switching circuit.Scheme when switching circuit is set is described in detail below.
In order to realize when IGBT modules 24 are connect with direct current transducer or DC power supply, it is anti-that diode can play reversal connection
Effect only, and when reverse current is powered to direct current transducer or DC power supply, the purpose that diode is short-circuited, such as Fig. 6
Shown, the frequency converter that the utility model embodiment provides further includes switching circuit and voltage detecting circuit 27, switching circuit with it is anti-
It takes over control only 26 parallel connection of circuit, voltage detecting circuit 27 and detects the DC input voitage of IGBT modules 24, frequency converter controller 30 exists
Control switching circuit is closed when DC input voitage reaches setting value.
Circuit is prevented to reversal connection by the realization of the switching circuit of setting, voltage detecting circuit 27 and frequency converter controller 30
26 short circuit, so that in the decelerating through motor of frequency converter connection, the reverse current of generation can charge to DC power supply.
When specifically used, as shown in fig. 6, the voltage detecting circuit 27 is used to detect the voltage of IGBT modules 24, and the electricity that will be detected
Pressure is transferred in frequency converter controller 30, and frequency converter controller 30 compares the voltage of the voltage of acquisition and setting, is obtaining
When the voltage value taken reaches setting value, frequency converter controller 30 controls switching circuit and is closed, and prevents circuit 26 short-circuit reversal connection.
Setting value therein can be the rated value of frequency converter input voltage, can also be slightly less than rated value.To ensure frequency converter control
When device 30 processed controls switching circuit closure, reversal connection prevents circuit 26 from having played the protection to IGBT modules 24.
When specifically used, when DC power supply is connect with IGBT modules 24, when being powered, diode pair IGBT modules 24 into
Row protection, when DC power supply connection is correct, 24 module 24 of IGBT modules just understands normal power-up, and is examined after powered up by voltage
Slowdown monitoring circuit 27 detects the voltage on IGBT modules 24, and when voltage reaches setting value, frequency converter controller 30 controls switching circuit
It is closed, control switching circuit is by shorted diode, and when decelerating through motor, generation reverses current through control switching circuit direction
It is flowed into DC power supply, and is charged to DC power supply.
In specific setting, which can be that different electrical parts forms, as switching circuit may include after
The different electrical part such as electric appliance 28, controllable diode, triode or field-effect tube, below by taking relay 28 as an example, such as Fig. 6 institutes
Show, the normal open switch 281 and diodes in parallel of relay 28, control terminal and the frequency converter controller 30 of relay 28 connect
It connects, when the voltage that voltage detecting circuit 27 detects reaches setting value, frequency converter controller 30 controls relay 28 and obtains electric, relay
Electromagnet in device 28 obtains electric, the plug-in strip of absorption normal open switch 281, the closure of normal open switch 281, switching circuit conducting, thus will
Shorted diode.It is circuit in the prior art for the different electrical part such as controllable diode, triode and field-effect tube
The middle device as control switch, connection relation and operation principle are connection type common in the art, herein
No longer it is described in detail.
For frequency converter provided in this embodiment, due to containing multiple electrical parts, a large amount of heat will produce at work,
In order to improve the environment of frequency converter work, and frequency converter the space occupied area is reduced, in frequency converter provided in this embodiment
Further include a heat sink, there are at least two installation regions on the heat sink, one of installation region is provided with IGBT
Module 24, other installation regions are the installation region that other electrical appliance modules are arranged.
By taking structure shown in Fig. 7 as an example, as shown in fig. 7, three installation regions being arranged on heat sink 10 are respectively first
Installation region 11, the second installation region 12 and third installation region 13.Wherein, the converter module 20 in frequency converter
(inverter, abbreviation INV) is mounted on the first installation region 11, and other regions can be used for installing other electrical appliance modules,
So that when frequency converter is with other electrical appliance modules assembling forming apparatus, other electrical appliance modules can be integrated on frequency converter, and
A heat sink 10 is shared with converter module 20, to the number that heat sink uses when reducing assembling forming apparatus, and then is reduced
The space of hold facility.
With continued reference to Fig. 7, in a specific scheme, the second installation region 12 can be setting frequency converter and/or its
The installation region of DC to DC (DC/DC) converter 60 of his direct current electrical appliance power supply, i.e., need to make in assembling equipment
When with DC/DC converters, which can be directly installed on the second installation region 12, and and converter module
20 share a heat sink 10.
When specifically used, as shown in fig. 7,20 one end of converter module is connect with accumulator 50, another connection exchange is negative
It carries, 60 one end of DC/DC converters is connect with accumulator 50, and the other end is connect with DC load, and when specifically used, frequency conversion
The direct current that accumulator 50 exports is converted to voltage and frequency needed for AC load by device module 20 according to the requirement of AC load
Alternating current, similarly, DC/DC converters 60 are converted to the direct current that accumulator 50 exports directly according to the requirement of DC load
DC current needed for current load.
With continued reference to Fig. 7, the third installation region 13 being arranged on heat sink 10 is 30 installation region of frequency converter controller, should
Frequency converter controller 30 is fixedly mounted on third installation region 13, and in specific setting, list may be used in frequency converter controller 30
The common control device such as piece machine, PLC or industrial PC.
It should be understood that in the above-described embodiments, although listing the frequency converter embodiment of Fig. 7, in the application reality
It applies the installation region in the heat sink 10 in example and is not limited only to above-mentioned three installation regions shown in Fig. 7, it can also be according to reality
The case where the installation regions of other numbers, such as the installation region of five, six different numbers are set.And installation region
Arrangement is also not limited to above-mentioned arrangement mode shown in Fig. 7, can according to the actual needs and the size reasonable of electrical appliance module
Installation region is set on heat sink 10.
When converter module 20 is connect with heat sink 10, specifically, together with reference to figure 7 and Fig. 8, converter module 20 is only
Including a substrate 21 and the multiple electrical equipments being arranged on the substrate 21, in specific setting, substrate 21 directly with dissipate
Hot plate 10 is fixedly connected, and in specific connection, is connected by connecting pole between substrate 21 and heat sink 10, so that substrate 21
The space for installing electrical equipment is formed between heat sink 10.In addition, capacitance 23 and IGBT modules 24 be in specific setting,
As shown in figure 8, capacitance 23 is arranged on the both sides of substrate 21 with IGBT modules 24, wherein IGBT modules 24 are arranged in 21 court of substrate
To heat sink 10 one side and contacted with heat sink 10, multiple capacitances 23 be arranged substrate 21 deviate from IGBT modules 24 one side.
When using which, IGBT modules 24 are in direct contact with heat sink 10, and the heat that IGBT modules 24 generate directly passes through heat dissipation
Plate 10 distributes, and improves the effect of heat dissipation.And in specific setting, the setting of multiple capacitances 23 deviates from IGBT in substrate 21
The one side of module 24, i.e., the higher-height setting of capacitance 23 deviates from the one side of heat sink 10 on the base plate (21, to reduce base
Spacing between plate 21 and heat sink 10 so that it is compact-sized between component, meanwhile, substrate 21 deviates from the one side of heat sink 10
There is no limit also allow for the setting of higher-height capacitance 23 to height space.And in specific setting, above-mentioned multiple capacitances
In, further include multiple second capacitances other than the first capacitance having been described.
In the present invention, should be as shown in Fig. 7 and Fig. 9, Fig. 7 and Fig. 9 show one of the utility model embodiment
The structure of converter module 20.In this embodiment, the converter module 20 is in addition to IGBT modules 24 among the above and more
Outside a capacitance 23, it is also provided with heat-conducting plate 22, specifically, substrate 21 is fixedly connected with heat-conducting plate 22, heat-conducting plate 22 and heat sink
10 are fixedly connected.And in specific setting, IGBT modules 24 are arranged in substrate 21 towards the one side of heat-conducting plate 22 and and heat conduction
Plate 22 contacts, and the one side for deviating from IGBT modules 24 in substrate 21 is arranged in multiple capacitances.I.e. in the present embodiment, converter module 20
Structure compared with structure shown in Fig. 2, increase a heat-conducting plate 22, which contacts with IGBT modules 24, is used in combination
In in the heat transfer to heat sink 10 that IGBT modules 24 generate.
In specific setting, in order to ensure the good of the stability connected between heat-conducting plate 22 and heat sink 10 and heat conduction
Property, it is fixedly connected with threaded connector by heat-conducting glue between heat-conducting plate 22 and heat sink 10, more specifically, first in heat-conducting plate
The 22 one side paintings opposite with heat sink 10 are covered with heat-conducting glue, and heat-conducting plate 22 and heat sink 10 are bonded in one by heat-conducting glue later
It rises, also, in order to avoid in heat dissipation, heat-conducting glue is connected through a screw thread by thermal failure between heat-conducting plate 22 and heat sink 10
Part tightens together, and when using the structure, is respectively provided on heat-conducting plate 22 and heat sink 10 and coordinates with the threaded connector
Through-hole 222 and threaded hole.In specific setting, which can be the common threaded connections such as bolt or screw
Part.
More specifically, as shown in Figure 10, when overlooking converter module 20, heat-conducting plate 22 is extended to the outside of substrate 21,
The through-hole 222 is arranged is extended to the part outside substrate 21 in heat-conducting plate 22.When using the structure, substrate 21 will not keep off spiral shell
Line connector, to have enough operating spaces, staff that can be convenient to use tool by heat-conducting plate 22 and heat sink 10
It is secured together to.More specifically, four four edges in heat-conducting plate 22 are arranged by 222.
Further, since being connect with threaded connector using heat-conducting glue between heat-conducting plate 22 and heat sink 10, therefore, dismantling
When, it first has to disassemble threaded connector, and then the bonding force of heat-conducting glue is overcome to divide heat-conducting plate 22 and heat sink 10
It opens, since heat-conducting glue covers the one side of entire heat-conducting plate 22, in dismounting, it is limited to operating space and the point of application
It limits, it is time-consuming and laborious when heat-conducting plate 22 is separated with substrate 21.In order to split converter module 20 and heat sink 10, in this reality
In the specific embodiment that example offer is provided, at least one removal hole 221 is additionally provided, which sets
It sets on the heat-conducting plate 22, specifically, as shown in Figure 10, which is arranged is extended to base in heat-conducting plate 22
The part in 21 outside of plate.And the removal hole 221 has threaded hole, for screw in by heat-conducting plate 22 with heat sink 10 is open-top tears open
Unload screw.And the position corresponding with the removal hole 221 of heat sink 10 is entity structure, and in specific dismounting, knockout screw is revolved
Enter into the threaded hole of removal hole 221, be continuously increased with the screw-in depth of knockout screw, knockout screw is pressed on heat sink 10
It is upper and strut heat-conducting plate 22 and heat sink 10, i.e., overcome the bonding force of heat-conducting glue by heat conduction by the power that screws of knockout screw
Plate 22 is strutted with heat sink 10.In specific setting, in order to facilitate uniform force, meanwhile, also for heat-conducting plate 22 easy to disassemble
Number with heat sink 10, the removal hole 221 is multiple, and multiple removal holes 221 are arranged around substrate 21, more in dismounting
A knockout screw gradually rotates, to split heat-conducting plate 22 and heat sink 10.
0 is continued to refer to figure 1, the removal hole 221 is in specific setting, by the way of stepped hole, specifically, the stepped hole
Including the smaller hole in the larger hole in an aperture and an aperture, also, the smaller hole in the aperture forms above-mentioned removal hole
221 threaded hole.When using which so that when using the shorter knockout screw of length, knockout screw still is able to screw in enough
Depth, guarantee heat-conducting plate 22 and heat sink 10 are strutted.It should be noted that in the present embodiment, the smaller hole of the diameter
Depth should be ensured that enough depth, when ensureing that knockout screw screws in, the screw thread on the inner wall of hole is capable of providing enough power
To overcome the bonding force of heat-conducting glue.
As a preferred scheme, in the present embodiment, the threaded hole and the connection heat-conducting plate of removal hole 221 and institute
The corresponding screw thread bore dia of threaded connector stated between heat sink is identical.When using the structure so that threaded connector
Diameter is identical as the diameter of knockout screw, i.e., threaded connector can be screwed into the threaded hole of removal hole 221 and with the screw thread
Hole coordinates, and then threaded connector can be used as knockout screw.Specifically, in operation, first by threaded connector
It disassembles, later, threaded connector is screwed into the threaded hole of removal hole 221 and is used as knockout screw by heat-conducting plate 22 and dissipates
Hot plate 10 struts.It can be seen from the above description that in dismounting, without using additional knockout screw, to reduce
The tool used when dismounting improves the convenience in dismounting.Also, the guarantor that the threaded connector disassembled can be stablized
It stays in removal hole 221, avoids the threaded connector disassembled and lose.
The heat sink that different radiating principles may be used for the heat sink 10 in the present embodiment, in a specific embodiment party
In case, as shown in figure 11, when assembling equipment is used to control motor 40, since motor housing generally use heat conductivility is good
Material is made, therefore the heat sink 10 can be formed on the shell of motor 40, i.e., is formed using a part of shell of motor 40
The heat sink of frequency converter and other electrical appliance modules, that is to say, that it is real that the utility model is formed on a part of shell of motor 40
Apply multiple installation regions described in example.To further incorporate each electrical appliance module of assembling equipment, assembling is reduced
The space of hold facility.Figure 11 show in the top shell of motor 40 and forms installation region, for installing converter module 20
And other electrical appliance modules.As shown in figure 11, in order to ensure to radiate, it is provided with radiator structure on the shell of motor 40, such as schemes
The radiating fin of the head and the tail both ends setting of motor 40 in 11.In this way, when assembling equipment is used to control motor 40, frequency converter
Heat sink 10 can directly use the radiator structure on motor 40, i.e. other component in frequency converter that can be directly installed on motor
On 40 shell, such as the converter module 20 and frequency converter controller 30 in above-described embodiment, it is arranged at the outer of motor 40
On shell.Similarly, other electrical appliance modules shown in above-described embodiment are entirely when on the heat sink of frequency converter 10, the electric appliance mould
Block is also secured on the shell of motor 40.
In addition, as shown in figure 12, heat sink 10 is liquid-cooling heat radiation plate；The liquid-cooling heat radiation plate includes a platy structure 14,
And the heat-dissipating pipe 15 being arranged in the platy structure 14,2 are continued to refer to figure 1, heat-dissipating pipe 15 provided in this embodiment, which spirals, to be set
It sets in platy structure 14, to increase the area of heat-dissipating pipe 15, and then increases its heat dissipation effect.The heat-dissipating pipe 15 has
One water inlet and a water outlet, and water inlet and water outlet form a circulation canal with water pump and refrigerating plant, from
And constantly the heat that frequency conversion device and other electrical appliance modules generate is distributed.Or the heat sink 10 is using such as Figure 13 institutes
The structure shown：It is provided with radiating fin 16 on the heat sink 10 of plate.I.e. the heat sink 10 is the solid metal plate of a plate,
And multiple radiating fins 16 are provided on the heat sink 10.To increase the contact area with air by radiating fin 16,
And then improve heat dissipation effect.The heat sink 10 is can be seen that by above-mentioned specific embodiment, and different modes progress may be used
Heat dissipation, but heat sink provided in this embodiment 10 is not limited only to Fig. 7 and specific structure shown in Fig. 8, what other can radiate
Heat sink 10 can also be applied in the present embodiment.
By can be seen that in the present embodiment described in above-described embodiment, set by using the heat sink 10 of frequency converter
Different installation regions is set so as to integrate other electrical appliance modules, equipment is assembled to simplify, convenient for the miniaturization of assembling equipment
Development.
Obviously, those skilled in the art can carry out the utility model various modification and variations without departing from this practicality
Novel spirit and scope.If in this way, these modifications and variations of the present invention belong to the utility model claims and
Within the scope of its equivalent technologies, then the utility model is also intended to include these modifications and variations.
Claims (12)
1. a kind of frequency converter, including frequency converter controller and converter module, the converter module includes substrate and setting
Electrical equipment on the substrate, the electrical equipment include at least insulated gate bipolar transistor module, which is characterized in that
The input terminal of the insulated gate bipolar transistor module, which is connected with reversal connection, prevents circuit；
Further include switching circuit and voltage detecting circuit, the switching circuit prevents circuit in parallel, the voltage with the reversal connection
Detection circuit detects the DC input voitage of the insulated gate bipolar transistor module, and the frequency converter controller is described straight
Stream input voltage controls the switching circuit when reaching setting value and is closed.
2. frequency converter as described in claim 1, which is characterized in that it is diode that the reversal connection, which prevents circuit,.
3. frequency converter as claimed in claim 2, which is characterized in that the anode of the anode connection direct current input of the diode,
Cathode connects the electrode input end of the insulated gate bipolar transistor module；Or
The cathode of the cathode connection direct current input of the diode, anode connect the negative of the insulated gate bipolar transistor module
Pole input terminal.
4. frequency converter as claimed in claim 3, which is characterized in that further include the first capacitance, first capacitance connection is in institute
State the negative input of the electrode input end and the insulated gate bipolar transistor module of insulated gate bipolar transistor module
Between.
5. frequency converter as described in claim 1, which is characterized in that the switching circuit includes relay, controllable diode, three
Pole pipe or field-effect tube.
6. frequency converter as described in claim 1, which is characterized in that further include heat sink, have at least two on the heat sink
A installation region, one of installation region are provided with the insulated gate bipolar transistor module, other installation regions are
The installation region of other electrical appliance modules is set.
7. frequency converter as claimed in claim 6, which is characterized in that further include multiple second capacitances, the insulated gate bipolar
Transistor module is arranged in the substrate towards the one side of the heat sink and is contacted with the heat sink；The multiple second electricity
It is installed with the one side set and deviate from the insulated gate bipolar transistor in the substrate.
8. frequency converter as claimed in claim 7, which is characterized in that the converter module further includes heat-conducting plate, the heat conduction
Plate is fixedly connected with the heat sink, and the substrate is fixedly connected with the heat-conducting plate, and the insulated gate bipolar transistor
Module is arranged in the substrate towards the one side of the heat-conducting plate and is contacted with the heat-conducting plate.
9. frequency converter as claimed in claim 6, which is characterized in that the heat sink is the shell of motor；Alternatively, the heat dissipation
Plate is liquid-cooling heat radiation plate.
10. frequency converter as claimed in claim 6, which is characterized in that be provided with radiating fin on the heat sink.
11. frequency converter as claimed in claim 6, which is characterized in that other described electrical appliance modules include DC to DC conversion
Device.
12. frequency converter as described in claim 1, which is characterized in that the input terminal of the insulated gate bipolar transistor module
Circuit is prevented by the reversal connection by be connected with DC power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721097452.1U CN207743846U (en) | 2017-08-30 | 2017-08-30 | Frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721097452.1U CN207743846U (en) | 2017-08-30 | 2017-08-30 | Frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207743846U true CN207743846U (en) | 2018-08-17 |
Family
ID=63114878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721097452.1U Active CN207743846U (en) | 2017-08-30 | 2017-08-30 | Frequency converter |
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| Country | Link |
|---|---|
| CN (1) | CN207743846U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110488071A (en) * | 2019-08-22 | 2019-11-22 | 广州京海科技有限公司 | A kind of shock-absorbing type voltage sensor with heat sinking function |
-
2017
- 2017-08-30 CN CN201721097452.1U patent/CN207743846U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110488071A (en) * | 2019-08-22 | 2019-11-22 | 广州京海科技有限公司 | A kind of shock-absorbing type voltage sensor with heat sinking function |
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