CN209233734U - The power module of frequency converter - Google Patents
The power module of frequency converter Download PDFInfo
- Publication number
- CN209233734U CN209233734U CN201820758971.6U CN201820758971U CN209233734U CN 209233734 U CN209233734 U CN 209233734U CN 201820758971 U CN201820758971 U CN 201820758971U CN 209233734 U CN209233734 U CN 209233734U
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
Abstract
A kind of power module of frequency converter, including shell and it is arranged in the intracorporal CPU board of shell and power module, power module includes the capacitor board and power panel of split settings, the power panel includes EMC circuit, rectification circuit, inverter circuit, output circuit and current sampling circuit, EMC circuit is connected with the rectifying circuit, capacitor board includes RC circuit and switching power circuit, rectification circuit and RC circuit connection, RC circuit is connect with inverter circuit and switching power circuit, switching power circuit is connect with inverter circuit and CPU board, inverter circuit is connect with output circuit, output circuit is connect with current sampling circuit, current sampling circuit is connect with CPU board, switching power circuit is inverter circuit, current sampling circuit and CPU board power supply, by the way that the bigger power module of horizontal area is split into two panels fission The power panel and capacitor board of setting can not only reduce power module the space occupied, and circuit distribution is reasonable.
Description
Technical field
The invention is related to Low Voltage Electrical Apparatus, more particularly to a kind of power module of frequency converter.
Background technique
Frequency converter is a kind of novel energy-conserving product that have developed rapidly in recent years, in today of energy growing tension, frequency converter
It is got in the industrial production as a kind of main means of AC speed regulating with its very strong reliability and anti-interference ability
It is more widely applied, has a vast market potentiality.In Small-power Inverter, volume miniaturization is that its main development becomes
Gesture, overall structure and its layout are increasingly exquisiter.But rectification, filtering, inversion, the drive of the power module of many frequency converters now
The functional blocks such as dynamic and Switching Power Supply are all integrated on one piece of pcb board, although having reached higher integrated level, such layout
Directly make route plate bulk big, influence package size indirectly, is unable to satisfy the demand that market tends to miniaturization.
Summary of the invention
The defect for aiming to overcome that the prior art of the invention, provides that a kind of structure is simple, small in size, the service life is long
Frequency converter power module.
To achieve the above object, the invention adopts the technical scheme that
A kind of power module of frequency converter, including shell and setting are in the intracorporal CPU board 210 of shell and power module, electricity
Source module includes the capacitor board 230 and power panel 240 of split settings, the power panel 240 include EMC circuit, rectification circuit,
Inverter circuit, output circuit and current sampling circuit, EMC circuit are connected with the rectifying circuit, and capacitor board 230 includes RC circuit and opens
Powered-down source circuit, rectification circuit and RC circuit connection, RC circuit are connect with inverter circuit and switching power circuit, Switching Power Supply
Circuit is connect with inverter circuit and CPU board 210, and inverter circuit is connect with output circuit, and output circuit and current sampling circuit connect
It connects, current sampling circuit is connect with CPU board 210, and switching power circuit is inverter circuit, current sampling circuit and CPU board 210
Power supply.
Optionally, the capacitor board 230 and power panel 240 are stacked, and capacitor board 230 tips upside down on the upper of power panel 240
Side, the RC circuit includes electrolytic capacitor assembly E0, and the bottom side of 230 one end of capacitor board, power supply is arranged in electrolytic capacitor assembly E0
The lower section of 230 other end of capacitor board is arranged in plate 240, is connected between capacitor board 230 and power panel 240 by connector.
Optionally, the RC circuit includes electrolytic capacitor assembly E0 and sequentially connected resistance R41, resistance R43, electricity
R46 and resistance R47 is hindered, electrolytic capacitor assembly E0 includes electrolytic capacitor E13, electrolytic capacitor E9, electrolytic capacitor E7 and electrolytic capacitor
The cathode of E8, electrolytic capacitor E13 are connected with the anode of electrolytic capacitor E9, the cathode of electrolytic capacitor E7 and the anode of electrolytic capacitor E8
Connection, node between the node between electrolytic capacitor E13 and electrolytic capacitor E9 and electrolytic capacitor E7 and electrolytic capacitor E8 and
Node connection between resistance R43 and resistance R46, the anode of electrolytic capacitor E13, the anode of electrolytic capacitor E7 and resistance R41 connect
Be connected with the rectifying circuit after connecing, after the cathode of electrolytic capacitor E9, the cathode of electrolytic capacitor E8 and resistance R47 connection with Switching Power Supply
Circuit is connected with inverter circuit.
Optionally, the top side of the power panel 240 is equipped with the long contact pin for being parallel to the setting of electrolytic capacitor assembly E0 axis
243, the socket 2430 mating with long contact pin 243 is equipped in the bottom side of capacitor board 230.
Optionally, the top side of the capacitor board 230 is equipped with the connection copper post 244 cooperated with the bottom side of power panel 240, electricity
Hold the pillar screw 2440 that plate 230 is equipped with connect the connection of copper post 244.
It optionally, further include DC bus current-limiting circuit, the connection copper post 244 is three comprising is connected to rectification
The pole P+ copper post 244a between circuit and DC bus current-limiting circuit, and be connected between RC filter circuit and inverter circuit
The pole the P pole copper post 244b and N copper post 244c, the electric current that rectifier circuit rectifies come out pass through the pole P+ copper post 244a to DC bus current limliting
Using RC circuit filtering after circuit, electric current a part after RC circuit filtering is arrived by the pole the P pole copper post 244b and N copper post 244c
Inverter circuit, another part are directly switching power circuit power supply.
Optionally, the lower section of the power panel 240 is equipped with radiator 260, sets between radiator 260 and power panel 240
There is partition 111, radiator 260 is fixedly connected with the bottom side of partition 111, and partition 111 is equipped with to be cooperated with electrolytic capacitor assembly E0
Partition escape port 115, and with radiator 260 cooperate bulkhead apertures 113, the lower section of electrolytic capacitor assembly E0 be equipped with
The fan assembly 270 that radiator 260 cooperates.
Optionally, the top side of the partition 111 is equipped with locating shaft 112, is equipped on power panel 240 and matches with locating shaft 112
The location hole 1120 of conjunction, capacitor board 230 are equipped with the positioning screw 1121 being fixedly connected with locating shaft 112, and locating shaft 112 passes through
Location hole 1120 is fixedly connected by positioning screw 1121 with capacitor board 230.
It optionally, further include DC bus current-limiting circuit and control circuit, the rectification circuit includes three groups and goes here and there two-by-two
The rectifier bridge M1B of the diode composition of connection, is parallel with electrolytic capacitor E2 and noninductive Absorption Capacitance C4 at the both ends of rectifier bridge M1B,
DC bus current-limiting circuit includes relay K1 and the first current-limiting resistance, the output end of rectification circuit by the first current-limiting resistance with
RC circuit connection, the normally opened contact of relay K1 are connected in parallel on the both ends of the first current-limiting resistance, and one end of the coil of relay K1 is logical
It crosses control circuit to connect with CPU board 210, the other end is connect with switching power circuit.
Optionally, the control circuit includes optocoupler H300 and triode Q300, and optocoupler H300 includes shining of matching
The anode of diode and phototriode, light emitting diode is connect with switching power circuit, and cathode passes through resistance R316 and CPU board
210 connections, the collector of phototriode connect with switching power circuit, the emitter of phototriode pass through resistance R317 and
The base stage of triode Q300 connects, and the collector of triode Q300 is connect with the coil of relay K1, the current collection of triode Q300
Pole is connect with COM terminal, is connected between the emitter and base stage of triode Q300 by resistance R323.
The power module of the frequency converter of the invention, by the way that the bigger power module of horizontal area is split into two panels
EMC circuit, rectification circuit, inverter circuit, defeated is arranged in the power panel 240 and capacitor board 230 of split settings on power panel 240
Circuit and current sampling circuit out DC bus current-limiting circuit, RC circuit and switching power circuit are arranged on capacitor board 230, no
Power module the space occupied can be only effectively reduced, and the circuit distribution on power panel 240 and capacitor board 230 is rationally, no
It will affect the electric property of frequency converter.In addition, tipping upside down on the top of power panel 240 by capacitor board 230 to reserve and accommodate electrolysis
The space of capacitance component E0, while the capacitor board 230 for tipping upside down on top is connected and supported by connector, efficiently utilize change
Vertical space inside frequency device complete machine not only has the characteristics that compact integral structure, small in size, but also reliability is higher, not by
The limitation of safety distance between horizontal space and line is installed also very convenient.
Detailed description of the invention
Fig. 1 is the circuit diagram of the invention power module；
Fig. 2 is the schematic diagram of the invention switching power circuit；
Fig. 3 is the circuit diagram of the invention switching mode power supply transformer；
Fig. 4 is the circuit diagram of the invention DC-DC conversion circuit；
Fig. 5 is the circuit diagram of the invention rectification circuit and DC bus current-limiting circuit；
Fig. 6 is a kind of embodiment of the invention DC bus current-limiting circuit；
Fig. 7 is the circuit diagram of the invention control circuit；
Fig. 8 is the circuit diagram of the invention RC circuit；
Fig. 9 is the invention direct-to-ground capacitance component and the circuit diagram of pressure sensitive component over the ground；
Figure 10 is the layout of the invention varistor component and direct-to-ground capacitance component over the ground；
Figure 11 is the exploded view of the invention frequency converter；
Figure 12 is the structural schematic diagram of the invention power module；
Figure 13 is the cooperation schematic diagram of the invention power module and shell；
Figure 14 is the structural schematic diagram of the long contact pin of the invention and connection copper post；
Figure 15 is the exploded view of the invention Figure 14；
Figure 16 is the structural schematic diagram of the invention partition.
Specific embodiment
Below in conjunction with the embodiment that attached drawing 1 to 16 provides, the power module of the frequency converter of the invention is further illustrated
Specific embodiment.The power module of the frequency converter of the invention is not limited to the following description.
As shown in figure 11, frequency converter includes shell and setting in the intracorporal CPU board 210 of shell, power module, PLC control
Device (not shown), relay and radiating module, radiating module include radiator 260 and fan assembly 270, and power module is
CPU board 210 is powered, and power module includes the capacitor board 230 and power panel 240 of split settings, CPU board 210, capacitor board 230,
Power panel 240 and radiator 260 are from top to bottom set gradually.
A kind of embodiment of power module as shown in figure 1, the power panel 240 includes EMC circuit, rectification circuit, inverse
Power transformation road, output circuit and current sampling circuit, EMC circuit are connected with the rectifying circuit, and rectification circuit is the power supply of capacitor board 230,
Inverter circuit is connect with output circuit, and output circuit is connect with current sampling circuit, and current sampling circuit is connect with CPU board 210,
Capacitor board 230 includes DC bus current-limiting circuit, RC circuit and switching power circuit, and the output end of rectification circuit passes through first
Current-limiting resistance and RC circuit connection, DC bus current-limiting circuit include relay K1, and the normally opened contact of relay K1 is connected in parallel on the
The one end at the both ends of one current-limiting resistance, the coil of relay K1 connects to the control circuit, the other end by with switching power circuit
Connection, RC circuit are connect with inverter circuit, switching power circuit and RC circuit connection, and switching power circuit is the drive of inverter circuit
Dynamic circuit, sample circuit and CPU board 210 are powered.It is set by the way that the bigger power module of horizontal area is split into two panels fission
EMC circuit, rectification circuit, inverter circuit, output circuit is arranged in the power panel 240 and capacitor board 230 set on power panel 240
And current sampling circuit, DC bus current-limiting circuit, RC circuit and switching power circuit are set on capacitor board 230, it can not only
Power module the space occupied is effectively reduced, and the circuit distribution on power panel 240 and capacitor board 230 is rationally, will not influence
The electric property of frequency converter.
As shown in Fig. 2, the switching power circuit includes connected switching power source control circuit and switching mode power supply transformer,
The primary current on-off of switching power source control circuit control switch power transformer, switching mode power supply transformer feedback voltage is to switch
Power control circuit, switching power source control circuit and RC circuit connection, switching mode power supply transformer are connect with DC-DC conversion circuit,
Switching mode power supply transformer is that DC-DC conversion circuit, inverter circuit, fan assembly 270 and CPU board 210 are powered, the core of frequency converter
The chip of piece, the chip of relay and PLC controller is arranged on CPU board 210, and DC-DC conversion circuit becomes Switching Power Supply
First DC voltage of depressor output is depressured again to be that CPU board 210 supplies together with switching mode power supply transformer after the second DC voltage
First DC voltage and the second DC voltage, by DC-DC conversion circuit to after Switching Power Supply transformer pressure-reducing again for chip supply
Electricity, can not only be by the type of reduction switching mode power supply transformer output voltage, to reduce winding on switching mode power supply transformer
Quantity reduces the volume of frequency converter, and replaces switching mode power supply transformer and LDO voltage stabilizer to be depressured with DC-DC conversion circuit,
Have the characteristics that small in size, temperature rise is low, PCB layout is simple.
If Fig. 3 shows a kind of embodiment of switching mode power supply transformer, switching mode power supply transformer includes and Switching Power Supply control
Circuit connection power drives processed and feedback unit, and connect with power drives and feedback unit the first winding L1, second around
Group L2, tertiary winding L3, and for inverter circuit driving power supply the 4th winding L4, be fan assembly 270 power the 5th around
Group L5, for the 6th winding L6 of frequency converter and the first DC voltage of DC-DC conversion circuit confession+15V, be frequency converter confession -15V
8th winding L8 of the 4th DC voltage and for relay chip and PLC controller chip confession+24V third direct current
7th winding L7 of pressure；
One end of first winding L1 is connect with power drives and feedback unit, and the other end is connected with one end of the second winding L2
It is connect afterwards with power drives and feedback unit, the other end of the second winding L2 is also connect with power drives and feedback unit, third
One end of winding L3 is connect with power drives and feedback unit, and the other end is connect with the 4th winding L4, one end of the 6th winding L6
Be grounded after being connect with one end of the 8th winding L8, one end of the 7th winding L7 is connect with one end of the 6th winding L6, the other end with
It is grounded after one end connection of 8th winding L8.
Specifically, one end of the 4th winding L4 is connected by one end of diode D12 and the driving circuit of inverter circuit, separately
One end is connect after connecting with tertiary winding L3 with the other end of the driving circuit of inverter circuit, and the both ends of the 4th winding L4 it
Between connect with capacitor C42 by capacitor E10, one end of the 6th winding L6 passes through the chip and DC-DC of diode D16 and frequency converter
Conversion circuit is connected to provide the first DC voltage of+15V, and the other end of the 6th winding L6 is connect with one end of the 8th winding L8
After be grounded；The chip of fan component 270, the chip of relay and PLC provides after one end of 7th winding L7 is rectified by D13
24V power supply, the other end are grounded after connecting with one end of the 8th winding L8, and the other end of the 8th winding L8 passes through diode D20
It is connect with the chip of frequency converter to provide the 4th DC voltage of -15V, the cathode of diode D16 passes sequentially through capacitor E21 and electricity
Hold C31 ground connection, the cathode of diode D13 passes sequentially through capacitor C77, capacitor E12 and capacitor C43 ground connection, the anode of diode D20
It is grounded by capacitor E14, cathode is connect with the anode of diode D21, and the cathode of diode D21 is connect with resistance R64, resistance
R64 is connect with resistance R115, and resistance R115 is connect with VPN terminal, and the node between resistance R64 and resistance R115 passes through capacitor
C5 ground connection, the node between resistance R115 and terminal VPN are grounded by resistance R40, and one end of the 5th winding L5 passes through diode
D2 is connect with fan assembly 270, and the other end is connect with COM terminal, and passes through capacitor E1 between the both ends of the 5th winding L5
It is connected with capacitor C25, is parallel with resistance R15 at the both ends of capacitor C25.It is external since PLC and frequency converter are connect with external equipment
The voltage of device will affect the stability of voltage on the 7th winding L7, therefore defeated to the 7th winding L7 using DC-DC conversion circuit
It will lead to spread of voltage after voltage step-down out for the chip power supply of frequency converter, and+15V the voltage of the 6th winding L6 output is only
It is depressured for the chip power supply inside frequency converter, therefore using+15V output voltage of the DC-DC conversion circuit to the 6th winding L6
Afterwards can be relatively stable for the chip power supply of frequency converter, it is reliable to have the characteristics that the chip for frequency converter is powered.In addition, pass through by
DC-DC conversion circuit is arranged on capacitor board 230, can further reduce frequency converter the space occupied.
As Fig. 4 shows a kind of preferred embodiment of DC-DC conversion circuit comprising conversion chip, the type of conversion chip
Number preferably AOZ1282CI, conversion chip include for the 4th pin 4 of voltage input and the 5th pin 5, for the of ground connection
Two pins 2, for PWM wave output the 6th pin 6, for feedback third pin 3 and for bootstrap voltage mode input first
Pin 1, the 4th pin 4 and the 5th pin 5 are connect with switching mode power supply transformer, and the 6th pin 6 passes through inductance L1 and CPU board 210
Connection, the second DC voltage of output are inverter supply, and one end of inductance L1 is connect with the cathode of capacitor C1 and diode D1, separately
One end is connect with the anode of electrolytic capacitor E1, and the cathode ground connection of electrolytic capacitor E1, the other end of capacitor C1 and the first pin 1 connect
It connects, the plus earth of diode D1, third pin 3 is connect by resistance R1 with chip, is parallel with capacitor at the both ends of resistance R1
One end of C2, capacitor C2 are grounded by resistance R2, and the other end is connect with the anode of electrolytic capacitor E1, the two of electrolytic capacitor E1
End is parallel with capacitor C3.Input filter effect of the capacitor C1 as starting voltage, capacitor C2 is that the feedback voltage of third pin 3 is defeated
Enter filtering, capacitor C3 and capacitor E1 collectively constitute filter circuit and the PWM wave that the 6th pin 6 exports are rectified into direct current, diode
D1 plays a protective role, and resistance R1 and resistance R2 collectively constitute bleeder circuit, and third pin is fed back to after output voltage is divided
3.Third pin 3 is as feedback foot, and voltage value is always held at 2.5V, so its output voltage First pin 1 is bootstrap voltage mode input, needs to be powered between the first pin 1 and the 6th pin 6 and hold
C1, actual test output voltage values are 4.98V, and in allowable range of error, ripple very little meets requirement, this embodiment party
The DC-DC conversion circuit of formula not only has the characteristics that Width funtion input and High-current output, but also temperature rise is low, output voltage is steady
Fixed, especially AOZ1282CI chip not only has the characteristics that the Width funtion input of 4.5-36V and 1.2A High-current output ability,
Voltage particularly suitable for frequency converter is converted.Certainly, a kind of preferred implementation side of DC-DC conversion circuit is illustrated only here
Formula can also realize decompression using others DC-DC conversion circuit, while be also not necessarily limited to only through model AOZ1282CI's
Chip is handled.
A kind of embodiment as shown in Figure 5, the rectification circuit include the whole of three groups of concatenated diode compositions two-by-two
Bridge M1B is flowed, is connect respectively with the R phase line of three-phase electricity, S phase line and T-phase line between every group of diode, at the both ends of rectifier bridge M1B
It is parallel with electrolytic capacitor E2 and noninductive Absorption Capacitance C4, DC bus current-limiting circuit includes relay K1 and the first current-limiting resistance,
The output end of rectification circuit is connected in parallel on the first current limliting by the normally opened contact of the first current-limiting resistance and RC circuit connection relay K1
The one end at the both ends of resistance, the coil of relay K1 connects to the control circuit, and the other end passes through the second current-limiting resistance R6 and switch
Power transformer output+24V electrical connection, certainly, the first current-limiting resistance be also possible to by any number resistance series connection and
At resistance value, power and the quantity of resistance are selected according to the specific power section of frequency converter.
It is equivalent to short circuit in powered on moment electrolytic capacitor E2, the voltage at both ends is zero, is buffered by resistance R4 and resistance R5
Impact to rectifier bridge M1B, after electrolytic capacitor E2 charging complete, CPU board 210 drives the line of relay K1 by control circuit
Trap closes normally opened contact to be shorted resistance R4 and resistance R5, and the waste of electric energy is reduced by short circuit resistance R4 and resistance R5, this
Bus current is directly flowed through from the coil of relay K1 afterwards, by increasing by between+24V control terminal and the coil of relay K1
Two current-limiting resistance R6, can reduce flow through the coil of relay K1 electric current I (R is the interior of the coil of relay K1
Resistance), and then reduce the calorific value Q (Q=I of the coil of relay K12R), the temperature rise of frequency converter can be effectively reduced.Certainly,
As the other embodiment of frequency converter, DC bus current-limiting circuit and control circuit can also be not provided with.
If Fig. 6 shows a kind of specific embodiment of DC bus current-limiting circuit, first current-limiting resistance includes successively
Concatenated resistance R7, resistance R9 and resistance R8, resistance R7, resistance R9 and resistance R8 are 56 Ω J/6W, and the two of electrolytic capacitor E2
End is in parallel with noninductive Absorption Capacitance C4, and the inverter circuit that noninductive Absorption Capacitance C4 is used to absorb DC bus current-limiting circuit rear end exists
The high frequency spikes voltage and current generated in switching process, resistance R4 and resistance R5 and resistance R7, resistance R8 and resistance R9 are
Metering function is played, only resistance and power used in the frequency converter of different capacity section are variant.
Further, the both ends of the coil of the relay K1 are in parallel with diode D300, the cathode K of diode D300
It being connected between the second current-limiting resistance R6 and the coil of relay K1, positive A is connect with the other end of the coil of relay K1,
Diode D300 can prevent the energy stored in the form of magnetic in coil with backward voltage surge when relay K1 is powered off
Form releases, and high electrical breakdown is caused to damage triode Q300.
If Fig. 7 shows a kind of embodiment of control circuit, the control circuit includes optocoupler H300 and triode Q300,
Optocoupler H300 includes the light emitting diode and phototriode matched, anode and the switching mode power supply transformer of light emitting diode
The connection of+5V output terminal, cathode are connect by resistance R316 with CPU board 210 and monitoring point TP300, the current collection of phototriode
The emitter of the connection of+24V of pole and switching mode power supply transformer output terminal, phototriode passes through resistance R317 and triode
The base stage of Q300 connects, and the collector of triode Q300 is connect by RY terminal with the coil of relay K1, triode Q300's
Collector is connect with COM terminal, is connected between the emitter and base stage of triode Q300 by resistance R323, resistance R323 and electricity
Hindering R316 is preferably 1k Ω F, and resistance R317 is preferably 10k Ω F.The closure of relay K1 is the CPU board 210 by frequency converter
Signal/MC control is controlled, optocoupler H300 will control the coil voltage signal isolation of signal and relay, with protection control electricity
Road, when controlling signal/MC is low level, optocoupler H300 conducting, the 1 of Q300 and 3 feet are conductings at this time, and+24V flows through second
Into 1 foot of Q300 and 3 feet to COM terminal ground after the coil of current-limiting resistance R6 and relay K1.
Preferably, the power of the frequency converter is preferably 7.5kW, and the resistance value of the coil of relay K1 is preferably 660 Ω,
The resistance value of the second current-limiting resistance R6 is preferably 100 Ω, when triode Q300 conducting, ignores the resistance after Q300 is connected,
The voltage U at the coil both ends of relay K1 is aboutThe voltage U at the coil both ends of relay K1
It is the 75% of nominal voltage+24V, relay can be normally attracted.
Preferably, the second current-limiting resistance R6 is the metalfilmresistor of 3W rated power, can satisfy powerful need
It asks.
If Fig. 8 shows a kind of embodiment of RC circuit, RC circuit by electrolytic capacitor assembly E0, resistance R41, resistance R43,
Resistance R46 and resistance R47 composition, resistance R41, resistance R43, resistance R46 and resistance R47 are connected in parallel on electrolysis electricity after being sequentially connected
The both ends for holding component E0, specifically, electrolytic capacitor assembly E0 includes electrolytic capacitor E13, electrolytic capacitor E9, electrolytic capacitor E7 and electricity
Capacitor E8 is solved, the cathode of electrolytic capacitor E13 is connected with the anode of electrolytic capacitor E9, the cathode and electrolytic capacitor E8 of electrolytic capacitor E7
Anode connection, after the anode of electrolytic capacitor E13, the anode of electrolytic capacitor E7 and resistance R41 connection with by terminals P 1 with directly
The connection of bus current-limiting circuit is flowed, the cathode of electrolytic capacitor E9, the cathode of electrolytic capacitor E8 pass through terminal N after connecting with resistance R47
Connect with switching power circuit and inverter circuit, the node between electrolytic capacitor E13 and electrolytic capacitor E9 and electrolytic capacitor E7 with
Node connection between node and resistance R43 and resistance R46 between electrolytic capacitor E8.
The voltage of voltage-withstand test generallys use 50Hz sine voltage (Equivalent DC voltage can be used), three-phase 380VAC
It is tested by DC2550V or AC1800V.Type approval test voltage is 5s from the time that the half of specified value is raised to specified value, keeps rule
The fixed test voltage time is 1min, is allowed when exfactory inspection to apply at least 1s test voltage value and replace.Frequency converter is not answered
Appearance punctures or flashover, and leakage current is less than or equal to 30mA, and the single-phase optional DC2120V voltage of frequency converter is (equivalent
AC1500V it) is tested, it is desirable that leakage current is less than or equal to 30mA.
If Fig. 9 shows a kind of embodiment of the voltage-withstand test earthing module of frequency converter, the EMC circuit includes difference
Access the component of varistor over the ground and direct-to-ground capacitance component of power supply, over the ground varistor component and direct-to-ground capacitance component respectively with
The both ends of socket T1 connect, and radiator 260 is grounded by ground terminal 2600, and ground terminal 2600 is connect with plug, socket T1
Mating with plug, varistor component and direct-to-ground capacitance component are connected by plug and socket T1 and ground terminal 2600 over the ground
It connecing and is grounded, varistor component and direct-to-ground capacitance component are used to inhibit lightning surge to improve the EMC performance of frequency converter over the ground,
It varistor component and direct-to-ground capacitance component will be connect over the ground with ground terminal 2600 by plug mating on socket T1
And be grounded, varistor component over the ground and over the ground electricity can be disconnected by directly pulling up plug from socket T1 in voltage-withstand test
Hold the connection between component and ground terminal 2600, does not need the component of varistor over the ground that will be welded and direct-to-ground capacitance component
It removes, greatly facilitates the operating process of voltage-withstand test, but also can reduce varistor component over the ground and direct-to-ground capacitance group
Part and assembly difficulty.
Specifically, the component of varistor over the ground include connect respectively with R phase line, S phase line and T-phase line it is pressure-sensitive over the ground
Resistance ZNR300, over the ground varistor ZNR301 and over the ground varistor ZNR303, over the ground varistor ZNR300, pressure-sensitive over the ground
Resistance ZNR301 and the over the ground other end of varistor ZNR303 are connect with varistor ZNR304 over the ground；Direct-to-ground capacitance component packet
The direct-to-ground capacitance C302, direct-to-ground capacitance C303 and direct-to-ground capacitance C304 connecting respectively with R phase line, S phase line and T-phase line are included, over the ground
The other end of capacitor C302, direct-to-ground capacitance C303 and direct-to-ground capacitance C304 are connect with direct-to-ground capacitance C307, over the ground varistor
ZNR304 and direct-to-ground capacitance C307 are connect with socket respectively.
Further, ground line is equipped in the plug, one end of ground line is connect with ground terminal 2600, the other end point
It is connect respectively with varistor component over the ground and direct-to-ground capacitance component for two root cuttings into socket T1, earth-return circuit can be shortened
Length improves the reliability of earth-return circuit.
If Figure 10 shows the layout of varistor component and direct-to-ground capacitance component over the ground, the direct-to-ground capacitance C302 and
Direct-to-ground capacitance C303 is arranged side by side, and direct-to-ground capacitance C304 is arranged in the right side of direct-to-ground capacitance C303, direct-to-ground capacitance C307 perpendicular to
At one end, direct-to-ground capacitance C304 is tilted to the right by end close to electric over the ground for direct-to-ground capacitance C302 and direct-to-ground capacitance C303 setting
Hold C307, one end of direct-to-ground capacitance C307 is connect with direct-to-ground capacitance C302, direct-to-ground capacitance C303 and direct-to-ground capacitance C304 respectively, separately
The side that one end reaches direct-to-ground capacitance C302 is connect with socket T1, and socket T1 is arranged in direct-to-ground capacitance C307 and direct-to-ground capacitance
Space between C302 angle, varistor ZNR303 is inclined at the right side of direct-to-ground capacitance C304 over the ground, over the ground pressure-sensitive electricity
It is led by what is passed through from direct-to-ground capacitance C302, direct-to-ground capacitance C303 and the bottom side direct-to-ground capacitance C304 the bottom side of resistance one end ZNR303
Line is connect with the other end of socket T1, over the ground varistor ZNR300, over the ground varistor ZNR301 and varistor over the ground
The other end that ZNR302 is centered around varistor ZNR303 over the ground is connect with the top side of varistor ZNR303 over the ground respectively, not only
It can make varistor component over the ground and direct-to-ground capacitance component compact layout under the premise of meeting performance and surveying, realize the small-sized of product
Change, and product edge is leaned in the position of socket T1, it is easier to scheduling and planning.
The power panel 240 and capacitor board 230 of the invention can be vertically arranged, and be preferably stacked, such as Figure 11-12
The embodiment being stacked is shown, power panel 240 and capacitor board 230 are stacked, and capacitor board 230 tips upside down on power panel 240
The bottom side of 230 one end of capacitor board is arranged in top, electrolytic capacitor assembly E0, and 230 other end of capacitor board is arranged in power panel 240
Lower section is equipped with electronic component and connector in the inside of capacitor board 230 and power panel 240, and power panel 240 passes through connector
It is connect with the bottom side of capacitor board 230, the partition escape port cooperated with electrolytic capacitor assembly E0 is equipped on one end of power panel 240
115, the other end is equipped with the connecting terminal 242 for extending to 230 outside of capacitor board, and electrolytic capacitor is given in structure by power panel 240
Component E0 reserves the space of back-off, while connecting and supporting the capacitor board 230 for tipping upside down on top by connector, effectively utilizes
Vertical space inside frequency converter complete machine not only has the characteristics that compact integral structure, small in size, but also reliability is higher,
Safety distance is not limited between by horizontal space and line, is installed also very convenient.
As shown in figs. 12-14, the connector include 240 top side of power panel is set be parallel to electrolytic capacitor assembly E0
The long contact pin 243 of axis setting and multiple connection copper posts 244, one end of long contact pin 243 is fixedly connected with power panel 240, in electricity
Hold plate 230 and be equipped with the socket 2430 mating with long contact pin 243, the one end and power panel 240 for connecting copper post 244, which are fixed, to be connected
It connects, the other end is equipped with threaded hole and offsets with the bottom side of capacitor board 230, is equipped on capacitor board 230 and connect copper post 244 with branch
The pillar screw 2440 being fixedly connected connects capacitor board 230 and power panel 240 by multiple connection copper posts 244, can be by capacitor
Plate 230 and power panel 240 are assembled into the structure with some strength, can be outside shell first by power panel 240 in assembly
It assembles, is then encased in power panel 240 and capacitor board 230 in shell as an individual structure, energy with capacitor board 230
The difficulty of assembly is enough effectively reduced, improves assembly efficiency.
Specifically, the connection copper post 244 includes the pole P+ being connected between rectification circuit and DC bus current-limiting circuit
Copper post 244a, and the pole the P pole the copper post 244b and N copper post 244c being connected between RC filter circuit and inverter circuit, rectified current
The electric current that road rectifies out from P+ terminal by after the DC bus current-limiting circuit on the copper post 244a to capacitor board 230 of the pole P+ by
RC circuit filtering, filtered electric current a part from P terminal and N-terminal pass through respectively the pole the P pole copper post 244b and N copper post 244c to
Inverter circuit, another part are directly the switching power circuit power supply of capacitor board 230, and switching power circuit passes through two groups of long contact pins
243 power to the driving of inverter circuit, sample circuit and CPU board 210 respectively.
As shown in figs. 12-16, partition 111, radiator are equipped in the shell between radiator 260 and power panel 240
260 are fixedly connected by screw with the bottom side of partition 111, and partition 111 is equipped with and keeps away with the electrolytic capacitor assembly E0 partition cooperated
Mouth 115 is allowed, and the bulkhead apertures 113 cooperated with radiator 260, at the side of radiator 260, electrolytic capacitor assembly E0
Side is equipped with fan assembly 270, is equipped with locating shaft 112 in the top side of partition 111, is equipped on power panel 240 and matches with locating shaft 112
The location hole 1120 of conjunction, capacitor board 230 are equipped with the positioning screw 1121 being fixedly connected with locating shaft 112, and locating shaft 112 is first worn
After crossing location hole 1120, then pass through positioning screw 1121 and be fixedly connected with capacitor board 230 with locating shaft 112, can utilize limited
Space power panel 240 and capacitor board 230 are positioned and are installed, not only better reliability, but also will not occupy again need not
The space wanted, naturally it is also possible to replace partition 111 that power panel 240 and capacitor board 230 are fixedly mounted on shell using other way
In vivo, the protection scope of the invention is belonged to.
Further, insulating paper 250 is equipped between the partition 111 above radiator 260 and power panel 240, by exhausted
Edge paper 250 improves the electrical isolation between radiating module and power panel 240, has the characteristics that occupy little space, low cost.
As shown in Figure 12,16, ground terminal 2600 includes the ground connection fixed part 262 connecting with radiator 260, and is passed through
Bulkhead apertures 113 extend to the ground connection wire connecting portion 261 of 111 top side of partition, are equipped on ground connection fixed part 262 and connect with radiator 260
The ground connection fixing screws 2621 connect are equipped with the ground connection terminal screw 2611 cooperated with partition 111 in ground connection wire connecting portion 261,
Partition 111 is equipped with the lower casing insert nut 2612 connecting with ground connection terminal screw 2611, is equipped with and connects on the side wall of shell
The ground connection wiring hole 2610 that ground wire connecting portion 261 cooperates, the corresponding side in ground connection wiring hole 2610 of the outer wall of shell are equipped with ground connection
Mark 2613, by the way that ground terminal 2600 to be hidden in shell, external earth lead can pass through ground connection wiring hole 2610 and stretch
To 2611 lower section of ground connection terminal screw, realize by the way that ground connection terminal screw 2611 and ground terminal 2600 are fixed by radiator 260
Ground connection, has the characteristics that safe and reliable, easy to operate.
It, cannot the above content is combining specific preferred embodiment to be further described to made by the invention
Assert that the specific implementation of the invention is only limited to these instructions.For the ordinary skill of the invention technical field
For personnel, without departing from the concept of the premise of the invention, a number of simple deductions or replacements can also be made, should all regard
For the protection scope for belonging to the invention.
Claims (8)
1. a kind of power module of frequency converter, including shell and setting be in the intracorporal CPU board of shell (210) and power module,
Be characterized in that: power module includes the capacitor board (230) and power panel (240) of split settings, and the power panel (240) includes
EMC circuit, rectification circuit, inverter circuit, output circuit and current sampling circuit, EMC circuit are connected with the rectifying circuit, capacitor board
It (230) include RC circuit and switching power circuit, rectification circuit and RC circuit connection, RC circuit and inverter circuit and Switching Power Supply
Circuit connection, switching power circuit are connect with inverter circuit and CPU board (210), and inverter circuit is connect with output circuit, output electricity
Road is connect with current sampling circuit, and current sampling circuit is connect with CPU board (210), and switching power circuit is inverter circuit, electric current
Sample circuit and CPU board (210) power supply.
2. the power module of frequency converter according to claim 1, it is characterised in that: the capacitor board (230) and power panel
(240) it is stacked, capacitor board (230) tips upside down on the top of power panel (240), and the RC circuit includes electrolytic capacitor assembly
In the bottom side of capacitor board (230) one end, power panel (240) setting is another in capacitor board (230) for E0, electrolytic capacitor assembly E0 setting
The lower section at end is connect between capacitor board (230) and power panel (240) by connector.
3. the power module of frequency converter according to claim 2, it is characterised in that: the RC circuit includes electrolytic capacitor group
Part E0 and sequentially connected resistance R41, resistance R43, resistance R46 and resistance R47, electrolytic capacitor assembly E0 include electrolytic capacitor
E13, electrolytic capacitor E9, electrolytic capacitor E7 and electrolytic capacitor E8, the positive phase of the cathode and electrolytic capacitor E9 of electrolytic capacitor E13
Even, the cathode of electrolytic capacitor E7 is connect with the anode of electrolytic capacitor E8, the node between electrolytic capacitor E13 and electrolytic capacitor E9 and
Node connection between node and resistance R43 and resistance R46 between electrolytic capacitor E7 and electrolytic capacitor E8, electrolytic capacitor
The anode of E13, the anode of electrolytic capacitor E7 are connected with the rectifying circuit after connecting with resistance R41, the cathode of electrolytic capacitor E9, electrolysis
It is connect after the cathode of capacitor E8 and resistance R47 connection with switching power circuit and inverter circuit.
4. the power module of frequency converter according to claim 3, it is characterised in that: the top side of the power panel (240) is set
It is parallel to the long contact pin (243) of electrolytic capacitor assembly E0 axis setting, is equipped with and long contact pin in the bottom side of capacitor board (230)
(243) mating socket (2430).
5. the power module of frequency converter according to claim 3, it is characterised in that: the top side of the capacitor board (230) is set
There is the connection copper post (244) with the bottom side of power panel (240) cooperation, capacitor board (230) is equipped with and connect copper post (244) connection
Pillar screw (2440).
6. the power module of frequency converter according to claim 5, it is characterised in that: it further include DC bus current-limiting circuit,
The connection copper post (244) is three comprising the pole the P+ copper post being connected between rectification circuit and DC bus current-limiting circuit
(244a), and the pole the P copper post (244b) and the pole N copper post (244c) that are connected between RC filter circuit and inverter circuit, rectification
The electric current that circuit rectifies come out is by the way that, using RC circuit filtering, RC is electric after the pole P+ copper post (244a) to DC bus current-limiting circuit
The filtered electric current a part in road arrives inverter circuit by the pole P copper post (244b) and the pole N copper post (244c), and another part is directly
Switching power circuit power supply.
7. the power module of frequency converter according to claim 2, it is characterised in that: set below the power panel (240)
There are radiator (260), partition (111), radiator (260) and partition are equipped between radiator (260) and power panel (240)
(111) bottom side is fixedly connected, and partition (111) is equipped with the partition escape port (115) cooperated with electrolytic capacitor assembly E0, and
With the bulkhead apertures (113) of radiator (260) cooperation, it is equipped in the lower section of electrolytic capacitor assembly E0 and cooperates with radiator (260)
Fan assembly (270).
8. the power module of frequency converter according to claim 7, it is characterised in that: the top side of the partition (111) is equipped with
Locating shaft (112), is equipped with the location hole (1120) that cooperates with locating shaft (112) on power panel (240), on capacitor board (230)
Equipped with the positioning screw (1121) being fixedly connected with locating shaft (112), locating shaft (112) passes through location hole (1120) and passes through positioning
Screw (1121) is fixedly connected with capacitor board (230).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820758971.6U CN209233734U (en) | 2018-05-21 | 2018-05-21 | The power module of frequency converter |
| PCT/CN2019/087611 WO2019223646A1 (en) | 2018-05-21 | 2019-05-20 | Frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820758971.6U CN209233734U (en) | 2018-05-21 | 2018-05-21 | The power module of frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209233734U true CN209233734U (en) | 2019-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820758971.6U Active CN209233734U (en) | 2018-05-21 | 2018-05-21 | The power module of frequency converter |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN209233734U (en) |
| WO (1) | WO2019223646A1 (en) |
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|---|---|---|---|---|
| CN111682772B (en) * | 2020-04-02 | 2023-06-30 | 上海航天控制技术研究所 | Multi-output switching power supply device of high-voltage servo controller |
| CN112243336B (en) * | 2020-09-24 | 2023-06-09 | 重庆大及电子科技有限公司 | Power converter convenient to heat dissipation |
| CN112994413B (en) * | 2021-03-24 | 2022-12-30 | 深圳市英威腾电气股份有限公司 | Natural heat dissipation frequency converter |
| CN114501797A (en) * | 2022-01-28 | 2022-05-13 | 广东汇芯半导体有限公司 | Frequency conversion controller based on PFC module |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2809026B2 (en) * | 1992-09-30 | 1998-10-08 | 三菱電機株式会社 | INVERTER DEVICE AND METHOD OF USING INVERTER DEVICE |
| CN204216772U (en) * | 2014-11-18 | 2015-03-18 | 深圳市英威腾电气股份有限公司 | A kind of new type inverter |
| CN205725473U (en) * | 2016-04-26 | 2016-11-23 | 浙江正泰电器股份有限公司 | Converter circuit |
| CN207339648U (en) * | 2017-08-21 | 2018-05-08 | 宁波德晶元科技有限公司 | A kind of voltage conversion circuit for Internet of Things single-site data acquisition |
| CN208904870U (en) * | 2018-05-21 | 2019-05-24 | 浙江正泰电器股份有限公司 | The power module of frequency converter |
| CN208239568U (en) * | 2018-05-21 | 2018-12-14 | 浙江正泰电器股份有限公司 | The voltage-withstand test earthing module of frequency converter |
| CN208904893U (en) * | 2018-05-21 | 2019-05-24 | 浙江正泰电器股份有限公司 | The power module of frequency converter |
-
2018
- 2018-05-21 CN CN201820758971.6U patent/CN209233734U/en active Active
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2019
- 2019-05-20 WO PCT/CN2019/087611 patent/WO2019223646A1/en active Application Filing
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| WO2019223646A1 (en) | 2019-11-28 |
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