CN206250956U - A kind of powder electrostatic gun drive circuit - Google Patents
A kind of powder electrostatic gun drive circuit Download PDFInfo
- Publication number
- CN206250956U CN206250956U CN201621157723.3U CN201621157723U CN206250956U CN 206250956 U CN206250956 U CN 206250956U CN 201621157723 U CN201621157723 U CN 201621157723U CN 206250956 U CN206250956 U CN 206250956U
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- mosfet
- bridge
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- phase
- gun
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Abstract
The utility model discloses a kind of powder electrostatic gun drive circuit,Including phase-shifting resonance full-bridge controllers,Full-bridge MOSFET output stages,High pressure pack circuit,The MOSFET that full-bridge MOSFET output stages are connected by control pole with phase-shifting resonance full-bridge controllers,2nd MOSFET,3rd MOSFET and the 4th MOSFET is constituted,Wherein,First MOSFET is all connected with the drain of the 3rd MOSFET with power supply+VOUT,The source class of the first MOSFET is connected with the drain of the 2nd MOSFET and the two tie point is connected with a high pressure pack circuit wherein input GUN OUTA,The source class of the 3rd MOSFET is connected with the drain of the 4th MOSFET and the two tie point input GUN OUTB another with high pressure pack circuit is connected.Because selecting highly integrated phase-shifting resonance full-bridge IC, with small volume, power is big, and efficiency high is reliable.
Description
Technical field
The utility model is related to high pressure electrostatic painting, especially a kind of powder electrostatic for high pressure electrostatic painting product
Rifle drive circuit.
Background technology
Electrostatic spraying is electronegative paint particles is oriented fortune along the opposite direction of electric field using high-pressure electrostatic electric field
It is dynamic, and paint particles are adsorbed into a kind of spraying method in workpiece surface.Electrostatic spraying device is by spray gun, spray cup and electrostatic
Apply the composition such as high voltage power supply, wherein electrostatic spraying high voltage power supply be reached by the multiple multiplication of voltage of high-voltage capacitance string by civil power it is up to ten thousand
Volt high pressure, high-voltage capacitance here serially adds the high voltage package that shell and casting glue composition are commonly called as, and is by transformer T1, Duo Zugao
Voltage capacitance, high-voltage diode are formed by connecting according to the schematic diagram shown in Fig. 1,12 grades of 24 multiplication of voltages altogether, wherein, how to design height
The drive circuit of briquetting is the key of product quality quality.
Utility model content
In order to solve the above technical problems, the purpose of this utility model is to provide a kind of raising efficiency and eliminates peak voltage
Powder electrostatic gun drive circuit.
The technical scheme that the utility model is used for：
A kind of powder electrostatic gun drive circuit, including phase-shifting resonance full-bridge controllers, full-bridge MOSFET output stages, high pressure
Bag circuit, a MOSFET, second that full-bridge MOSFET output stages are connected by control pole with phase-shifting resonance full-bridge controllers
MOSFET, the 3rd MOSFET and the 4th MOSFET are constituted, wherein, the drain of a MOSFET and the 3rd MOSFET all with power supply+
VOUT is connected, and the source class of a MOSFET is connected and the two tie point and high pressure pack circuit wherein with the drain of the 2nd MOSFET
Input GUN-OUTA is connected, and the source class of the 3rd MOSFET is connected and the two tie point and high voltage package with the drain of the 4th MOSFET
Another input GUN-OUTB connections of circuit, the source class of the 2nd MOSFET and the 4th MOSFET is grounded GND, the high voltage package respectively
Input GUN-OUTA and input GUN-OUTB be also connected with phase-shifting resonance full-bridge controllers.
Further, a MOSFET, the 2nd MOSFET, control pole and the phase shift of the 3rd MOSFET and the 4th MOSFET
A current-limiting resistance is all provided between resonant full bridge controller.
Compared with prior art, the utility model has the advantages that：Because complete from highly integrated phase-shifting resonance
Bridge IC, with small volume, power is big, and efficiency high is reliable；Compare with routine self-maintained circuit, peak voltage is substantially complete
Totally disappeared except and power increases 1 times, the switching tube of output stage is switched under no-voltage environment；After using appropriate working frequency,
Output stage can be made to work under resonance condition, so that voltage-multiplying circuit of the inversion output high-frequency and high-voltage sine voltage for rear class；
Compare with routine self-maintained circuit, peak voltage is substantially completely eliminated and power increases 1 times, and the switching tube of output stage is zero
Switched under voltage environment.
Brief description of the drawings
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings.
Fig. 1 is the line map of high pressure pack circuit；
Fig. 2 is the circuit diagram of full-bridge MOSFET output stages；
Fig. 3 is the circuit diagram of phase-shifting resonance full-bridge controllers；
Fig. 4 is the output timing diagram of phase-shifting resonance full-bridge controllers.
Specific embodiment
Refering to shown in Fig. 1-Fig. 3, being a kind of powder electrostatic gun drive circuit of the present utility model, including phase-shifting resonance is complete
Bridge controller, full-bridge MOSFET output stages, high pressure pack circuit, full-bridge MOSFET output stages are complete with phase-shifting resonance by control pole
First MOSFET of bridge controller connection, the 2nd MOSFET, the 3rd MOSFET and the 4th MOSFET compositions, respectively Q311 ~
Q314, wherein, a MOSFET is all connected with the drain of the 3rd MOSFET with power supply+VOUT, the source class of a MOSFET and
The drain of two MOSFET is connected and the two tie point is connected with a high pressure pack circuit wherein input GUN-OUTA, the 3rd MOSFET
Source class be connected with the drain of the 4th MOSFET and the two tie point input GUN-OUTB another with high pressure pack circuit is connected,
The source class of two MOSFET and the 4th MOSFET is grounded GND, the input GUN-OUTA and input GUN- of the high voltage package respectively
OUTB is also connected with phase-shifting resonance full-bridge controllers.
Further, a MOSFET, the 2nd MOSFET, control pole and the phase shift of the 3rd MOSFET and the 4th MOSFET
A current-limiting resistance, respectively R311 ~ R314 are all provided between resonant full bridge controller.
As shown in figure 3, phase-shifting resonance full-bridge controllers U601 provides four gate drivers：Two floating-point flash grids
Driver HO1 and HO2, and two low side gate drivers LO1 and LO2 of ground connection benchmark.Each inner drive has
There are 1.5A peak values sink current and 2A peak values to take out current capacity.Low side gate drivers are directly powered by VCC voltage-stablizers.
HO1 and HO2 gate drivers are powered by the bootstrap capacitor being connected between BST1/BST2 and HS1/HS2 respectively.
When corresponding switching node (HS1/HS2 pins) is low level, VCC is connected to
External diode between (negative electrode pin) and BST (negative electrode pin) is electric by the bootstrapping charged from VCC
Hold for high side gate driver is powered.When flash MOSFET is opened, BST1 rises to one and is equal to VCC+VHS1
Crest voltage, VHS1 is node voltage in formula.BST and VCC electric capacity should be placed near the position of LM5046 pins
Put, to reduce due to voltage transient caused by stray inductance as far as possible, because the peak value sink current for now arriving MOSFET grids may
More than 1.5A.The recommendation of BST electric capacity is 0.1 μ F or bigger.Low ESR/ESL electric capacity, such as surface mount pottery should be used
Porcelain electric capacity, with the voltage drop for preventing from occurring during HO state transformations.
As shown in figure 4, the order of the raster data model output of phase-shifting resonance full-bridge controllers U601 is：Initially, passed in power
Defeated cycle, HO1 and LO2 on diagonal are opened together, followed by afterflow (free-wheel) cycle, now
HO1 and HO2 keep it turned on.In follow-up phase, HO2 and LO1 on diagonal are opened, and are followed by an afterflow week
Phase, now LO1 and LO2 keep it turned on.Power delivery pattern is commonly known as aggressive mode, and freewheeling mode is often claimed
It is Passive Mode.Dead Time TPA between Passive Mode and aggressive mode is set by RD1 resistance；Aggressive mode
Dead Time TAP and Passive Mode between is then set by RD2 resistance.
If COMP pin opens, output will be run with maximum duty cycle.Maximum duty cycle per phase is by RD1
Dead Time that resistance is set is limited.If RD1 resistance is set to zero, then due to the Dead Time of inner setting, most
Big space rate is slightly below 50%.The fixed Dead Time in inside is 30 ns, and it will not change with working frequency.
Preferred embodiments of the present utility model are the foregoing is only, the utility model is not limited to above-mentioned embodiment party
Formula, if with essentially identical means realize the technical scheme of the utility model purpose belong to protection domain of the present utility model it
It is interior.
Claims (2)
1. a kind of powder electrostatic gun drive circuit, it is characterised in that：It is defeated including phase-shifting resonance full-bridge controllers, full-bridge MOSFET
Go out level, high pressure pack circuit, full-bridge MOSFET output stages be connected with phase-shifting resonance full-bridge controllers by control pole first
MOSFET, the 2nd MOSFET, the 3rd MOSFET and the 4th MOSFET composition, wherein, the leakage of a MOSFET and the 3rd MOSFET
Level is all connected with power supply+VOUT, and the source class of a MOSFET is connected and the two tie point and high pressure with the drain of the 2nd MOSFET
A bag circuit wherein input GUN-OUTA is connected, and the source class of the 3rd MOSFET is connected with the drain of the 4th MOSFET and the two connects
Contact input GUN-OUTB another with high pressure pack circuit is connected, and the 2nd MOSFET is grounded respectively with the source class of the 4th MOSFET
GND, the input GUN-OUTA and input GUN-OUTB of the high voltage package are also connected with phase-shifting resonance full-bridge controllers.
2. powder electrostatic gun drive circuit according to claim 1, it is characterised in that：First MOSFET, second
Current limliting electricity is all provided between MOSFET, the 3rd MOSFET and the control pole and phase-shifting resonance full-bridge controllers of the 4th MOSFET
Resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621157723.3U CN206250956U (en) | 2016-10-24 | 2016-10-24 | A kind of powder electrostatic gun drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621157723.3U CN206250956U (en) | 2016-10-24 | 2016-10-24 | A kind of powder electrostatic gun drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206250956U true CN206250956U (en) | 2017-06-13 |
Family
ID=58996418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621157723.3U Active CN206250956U (en) | 2016-10-24 | 2016-10-24 | A kind of powder electrostatic gun drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206250956U (en) |
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2016
- 2016-10-24 CN CN201621157723.3U patent/CN206250956U/en active Active
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