CN207304400U - A kind of driving power - Google Patents
A kind of driving power Download PDFInfo
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- CN207304400U CN207304400U CN201721383848.2U CN201721383848U CN207304400U CN 207304400 U CN207304400 U CN 207304400U CN 201721383848 U CN201721383848 U CN 201721383848U CN 207304400 U CN207304400 U CN 207304400U
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Abstract
The utility model discloses a kind of driving power, it includes transformer, EMI filter circuit, rectification circuit, BOOST booster circuits, PWM chip, protect detection circuit, start control circuit, DC DC circuits, negative voltage generating circuit and positive pressure generation circuit, protect in detection circuit, the feedback end of PWM chip is connected to the cathode of the first voltage-stabiliser tube, the plus earth of first voltage-stabiliser tube, the luminous tube anode of optocoupler is connected to power end by first resistor, its tube cathode that shines is connected to the cathode of a reference source, second resistance is connected between the anode and cathode of the optocoupler, the plus earth of a reference source, its control pole is connected to the output terminal of driving power by the 4th resistance, the control pole also passes through the 5th resistance eutral grounding.Wherein, PWM chip will not enter protected mode because of the instantaneous high pressure of load, while the utility model will not be chronically at power-up state, reduce the consumption to power, and improve the service life of complete machine.
Description
Technical field
Driving power technical field is the utility model is related to, more particularly to a kind of driving electricity being used for for power electronic equipment
Source.
Background technology
It is circuit power supply often through driving power in existing electronic product, these circuits are connected as load
To driving power.To avoid the excessive caused threat of load current, overload is realized often through PWM chip in driving power
Protection, with being stepped up for load current, the feedback terminal voltage of PWM chip can be also stepped up, when on the voltage of feedback end
When rising to the threshold voltage of PWM chip, PWM chip will enter protected mode, so that driving power is in protection hiccup state
Or without output.But in the larger occasion of load current transient change, such as the product such as amplifier power supply, printer power supply, PWM
Chip can enter protected mode due to the false judgment to instantaneous high pressure, so that electronic product is stopped, such case
Very big technical barrier is caused for design and R＆D work.Meanwhile in the prior art, PWM chip can be prevented by also not disclosed
The method of protection by mistake, therefore, existing driving power is not suitable for the electronic product that load current changes greatly.
In addition, in existing driving power, when switching tube is connected, output transformer serves as inductance, and electric energy is converted into magnetic
Can, output loop no current at this time；On the contrary, when switching tube turns off, output transformer releases energy, and magnetic energy is converted into electric energy,
There is electric current in output loop.Driving power is starting moment, it is necessary to take voltage from input line, powers to pwm chip, when
Startup event is completed, and pwm chip is by ancillary coil winding power.Under normal conditions, driving power, which needs to add, starts electricity
Road, widely used at present to be powered from input terminal by resistance current limliting directly to pwm chip, this circuit structure exists as follows
Shortcoming：Start-up circuit is chronically at power-up state due to not possessing automatic shutoff function, and after power supply has been started up, current-limiting resistance is still
So there is electric current to flow through, consume certain power, influence overall efficiency and service life.
In practical application, in existing electronic product, usually only a kind of input voltage, but modules institute in circuit
Need voltage different, which results in, at the same time there are several voltages, also need to negative pressure sometimes, at this time in whole circuit
Just need to be boosted input voltage, be depressured, the processing such as polarity inversion, it is met voltage needed for circuit modules.And
The characteristics of relatively conventional step-up method is to use DC-DC booster circuit, the DC-DC booster circuit is high conversion efficiency, output
Electric current is big；The method for producing negative pressure is to use DC-DC anti-polarity circuits, its feature is also efficient, and output current is big.
Utility model content
The technical problems to be solved in the utility model is, there is provided a kind of driving power, it is negative to make driving power be suitable for
The larger electronic product of curent change is carried, while improves the overall efficiency of power supply, and is prolonged the service life, positive electricity can be provided in addition
Pressure and negative voltage, and product cost can be reduced, reduce interference.
In order to solve the above technical problems, the utility model adopts the following technical solution.
A kind of driving power, it includes a transformer, its input terminal connection power grid, for by input voltage decompression transformation
Exported afterwards from output terminal；One EMI filter circuit, its input terminal connects the output terminal of the transformer, for filtering out extraneous power grid
High-frequency impulse to the interference of the interference of power supply and the power supply to extraneous power grid；One rectification circuit, its input terminal connection described in
The output terminal of EMI filter circuit, for the AC rectification of input to be exported after Rectified alternating current from output terminal；One BOOST
Booster circuit, its input terminal connects the output terminal of the rectification circuit, for will export direct current after input voltage boosting inverter
Pressure；One PWM chip, its input terminal connect the output terminal of the rectification circuit, boost for output pulse width modulated signal to BOOST
The drive end of circuit, to drive BOOST booster circuits to export lasting DC voltage；One protection detection circuit, it includes one
Voltage-stabiliser tube, an optocoupler and an a reference source, the feedback end of the PWM chip are connected to the cathode of voltage-stabiliser tube, the sun of the voltage-stabiliser tube
Pole is grounded, and the photosensitive pipe collector of the optocoupler is connected to feedback end, its photosensitive tube emitter ground connection, the luminous tube sun of the optocoupler
Pole is connected to power end by first resistor, its tube cathode that shines is connected to the cathode of a reference source, the anode and the moon of the optocoupler
Second resistance, the plus earth of a reference source are connected between pole, its control pole is connected to driving electricity by the 4th resistance
The output terminal in source, the control pole also pass through the 5th resistance eutral grounding；One starts control circuit, and the startup control circuit includes one
Rectifier bridge, the ac input end of the rectifier bridge are parallel to the output terminal of transformer, and the DC output end of the rectifier bridge passes through
The tie point of the 3rd capacitance, the 6th resistance and the 4th capacity earth being sequentially connected in series, the 6th resistance and the 4th capacitance also passes through one
7th resistance is connected to the drain electrode of one first metal-oxide-semiconductor, and the tie point of the 6th resistance and the 4th capacitance is additionally coupled to the first metal-oxide-semiconductor
Grid, the source electrode of the first metal-oxide-semiconductor are connected to the cathode of one second voltage-stabiliser tube, the plus earth of the second voltage-stabiliser tube, the first metal-oxide-semiconductor
Source electrode is additionally coupled to the anode of one first diode, and the cathode of the first diode passes through one the 5th capacity earth, the first diode
Tie point with the 5th capacitance is PWM power ends, and the PWM power ends are used to power for PWM chip, which also connects
The cathode of one second diode is connected to, the anode of second diode is grounded by the secondary main winding of transformer；One DC-DC electricity
Road, its input terminal connect the output terminal of BOOST booster circuits, and the voltage for BOOST booster circuits to be exported carries out direct current and turns
After DC converting, DC voltage is exported through its voltage output end, square-wave signal is exported through its pulse output end；One negative pressure produces electricity
Road, it is connected to the pulse output end of DC-DC circuit, for by the square-wave signal that DC-DC circuit exports by capacitance boot and
Be converted to negative voltage；One positive pressure generation circuit, it is connected to the pulse output end of DC-DC circuit, for DC-DC circuit to be exported
Square-wave signal booted by capacitance and carry out boost conversion.
Preferably, the cathode of a reference source is also connect by sequentially connected second capacitance, 3rd resistor and the 5th resistance
Ground.
Preferably, the feedback end passes through the first capacity earth.
The beneficial effects of the utility model are that PWM chip will not enter protected mode because of the instantaneous high pressure of load, together
When, overcurrent protection and short-circuit protection are also carried out by the current detecting end of its own, improve the bringing onto load energy of driving power
Power, the electronic product larger suitable for such as amplifier power supply, printer power supply even load curent change.Meanwhile the utility model
Power-up state will not be chronically at, reduces the consumption to power, and also improves the service life of complete machine.In addition, this reality
Positive voltage and negative voltage can be provided for circuit with new, and product cost can be reduced, reduce interference.
Brief description of the drawings
Fig. 1 is the circuit block diagram of the utility model.
Fig. 2 is the circuit diagram of protection detection circuit.
Fig. 3 is the schematic diagram for starting control circuit.
Fig. 4 is the schematic diagram of negative voltage generating circuit and positive pressure generation circuit.
Embodiment
The utility model is described in more detail with reference to the accompanying drawings and examples.
The utility model discloses a kind of driving power, and with reference to shown in Fig. 1 to Fig. 4, it includes：
One transformer 1, its input terminal connection power grid, for will be exported after input voltage decompression transformation from output terminal；
One EMI filter circuit 2, its input terminal connects the output terminal of the transformer 1, for filtering out the high frequency of extraneous power grid
Pulse is to the interference of the interference of power supply and the power supply to extraneous power grid；
One rectification circuit 3, its input terminal connects the output terminal of the EMI filter circuit 2, for the alternating current of input is whole
Flow to be exported after Rectified alternating current from output terminal；
One BOOST booster circuits 5, its input terminal connects the output terminal of the rectification circuit 3, for input voltage to be boosted
DC voltage is exported after conversion；
One PWM chip U3, its input terminal connect the output terminal of the rectification circuit 3, for output pulse width modulated signal extremely
The drive end of BOOST booster circuits 5, to drive BOOST booster circuits 5 to export lasting DC voltage；
One protection detection circuit 6, it includes one first voltage-stabiliser tube ZD1, an optocoupler U2 and a reference source a U1, the PWM
The feedback end FB of chip U3 is connected to the cathode of the first voltage-stabiliser tube ZD1, the plus earth of the first voltage-stabiliser tube ZD1, the light
The photosensitive pipe collector of coupling U2 is connected to feedback end FB, its photosensitive tube emitter ground connection, the luminous tube anode of optocoupler U2 passes through
First resistor R1 and be connected to power end VDD, its tube cathode that shines is connected to the cathode of a reference source U1, the anode of optocoupler U2 and
Second resistance R2, the plus earth of a reference source U1 are connected between cathode, its control pole is connected by the 4th resistance R4
To the output end vo ut of driving power, which is also grounded by the 5th resistance R5；
One starts control circuit 8, and the startup control circuit 8 includes a rectifier bridge DB1, the friendship of the rectifier bridge DB1
Stream input terminal is parallel to the output terminal of transformer 1, and the DC output end of the rectifier bridge DB1 passes through the 3rd capacitance that is sequentially connected in series
The tie point of C80, the 6th resistance R80 and the 4th capacitance C81 ground connection, the 6th resistance R80 and the 4th capacitance C81 also pass through one the 7th
Resistance R81 is connected to the drain electrode of one first metal-oxide-semiconductor Q80, and the tie point of the 6th resistance R80 and the 4th capacitance C81 are additionally coupled to
The grid of one metal-oxide-semiconductor Q80, the source electrode of the first metal-oxide-semiconductor Q80 are connected to the cathode of one second voltage-stabiliser tube DZ80, the second voltage-stabiliser tube
The plus earth of DZ80, the source electrode of the first metal-oxide-semiconductor Q80 are additionally coupled to the anode of one first diode D80, the first diode D80
Cathode be grounded by one the 5th capacitance C82, the tie point of the first diode D80 and the 5th capacitance C82 are PWM power end VDD,
The PWM power ends VDD is used to power for PWM chip U3, and PWM power ends VDD is additionally coupled to the moon of one second diode D81
Pole, the anode of second diode D81 are grounded by the secondary main winding T80 of transformer 1；
One DC-DC circuit 10, the output terminal of its input terminal connection BOOST booster circuits 5, for by BOOST booster circuits 5
After the voltage of output carries out DC to DC conversion, DC voltage is exported through its voltage output end AVDD, through its pulse output end
P-OUT exports square-wave signal；
One negative voltage generating circuit 20, it is connected to the pulse output end P-OUT of DC-DC circuit 10, for by DC-DC circuit
The square-wave signal of 10 outputs is booted by capacitance to be converted to negative voltage；
One positive pressure generation circuit 30, it is connected to the pulse output end P-OUT of DC-DC circuit 10, for by DC-DC circuit
The square-wave signal of 10 outputs is booted by capacitance to carry out boost conversion.
In foregoing circuit structure, by the first voltage-stabiliser tube ZD1 connections between the feedback end FB and ground of PWM chip U3, when negative
When carrying electric current increase, the feedback end FB voltages rise of PWM chip, and the pulse width signal exported by PWM chip U3 to it carries out
Modulation, making the output voltage of the output end vo ut of driving power reduces, wherein, reduction and the load electricity of driving power output voltage
The increase of stream keeps linear change, when the voltage of feedback end FB rises to the clamp value of the first voltage-stabiliser tube ZD1, the first voltage-stabiliser tube
ZD1 is turned on because of reverse breakdown, and at this time, even if load current continues to increase, it is steady that the voltage of feedback end FB is still maintained at first
Threshold value of the clamp value of pressure pipe ZD1 without reaching PWM chip U3, PWM chip U3 will not enter protected mode.Meanwhile by
There is overcurrent protection and short-circuit protection in the current detecting end of PWM chip U3 itself, so, the current detecting can be passed through
Hold and realize the overload protection to driving power.The beneficial effects of the utility model are that PWM chip U3 will not be because of the wink of load
When high pressure and enter protected mode, and overcurrent protection and short-circuit protection are carried out by the current detecting end of its own, improved
The carrying load ability of driving power, suitable for the electronic product that such as amplifier power supply, printer power supply even load curent change are larger
In.
In addition, when the ac input end incoming transport of rectifier bridge DB1 is electric, electric current passes through the 3rd capacitance C80, the 6th resistance
R80 and the 4th capacitance C81 circulates to ground, and the 3rd capacitance C80 and the 4th capacitance C81 charges at this time and the voltage of the two is started from scratch
Rise, when the voltage of the 4th capacitance C81 rises to when opening threshold values of the first metal-oxide-semiconductor Q80, the first metal-oxide-semiconductor Q80 is turned on, at this time,
Electric current is grounded by the first rectifying tube DB1, the 3rd capacitance C80, the 6th resistance R80, the first diode D80 and the 5th capacitance C82,
At this time, the 5th capacitance C82 chargings and its charging voltage rises to the clamp voltage of DZ2, make PWM power ends VDD produce voltage and
Power for PWM chip.After the 3rd capacitance C80 and the 4th capacitance C81 fully charged, the electric current for flowing through the 6th resistance R80 is zero, the
The voltage of four capacitance C81 constantly reduces, until the first metal-oxide-semiconductor Q80 is turned off, start-up circuit cut-off.At this time, the 5th capacitance C82, auxiliary
Winding T1 and the second diode D81 is helped to be formed into a loop, the 5th capacitance C82 continues to provide charging current by auxiliary winding T1, with order
What PWM power ends VDD can continue powers for PWM chip, and circuit start is completed.This circuit structure, it has the first MOS of control
The effect of pipe Q80 automatic shutoffs, for existing startup control circuit, the utility model will not be chronically at power-up state,
Reduce the consumption to power, meanwhile, also improve the service life of complete machine.
Further, when the output end voltage Vout of driving power has compared with minor swing, due to the 4th resistance R4 and the 5th
The partial pressure effect of resistance R5, the voltage of a reference source U1 control terminals also changes therewith, and the on-state rate of a reference source U1 changes, from
And the angle of flow of optocoupler U2 is changed, since the photosensitive pipe collector of optocoupler U2 connects feedback end FB, its emitter ground connection, makes anti-
The voltage of feedback end FB changes with the angle of flow of optocoupler U2, to make voltage changes of the PWM chip U3 according to feedback end FB
And the pulse width signal that it is exported is modulated, so as to further adjust the voltage of the output end vo ut of driving power, suppress defeated
Go out the fluctuation of voltage.
As shown in Figure 1, the cathode of a reference source U1 also passes through sequentially connected second capacitance C2,3rd resistor R3 and the 5th electricity
R5 ground connection is hindered, so as to filter out the noise jamming of a reference source U1 cathodes.Feedback end FB is grounded by the first capacitance C1, to filter out feedback
Hold the noise jamming of FB.
In the present embodiment, the first voltage-stabiliser tube ZD1 selects the voltage-stabiliser tube that clamp value is 3V-5V, and still, this is that this practicality is new
One preferred embodiment of type, is not intended to limit the present invention, can be with the other embodiments of the utility model
Select the voltage-stabiliser tube of other clamp values.For example, the voltage-stabiliser tube of a clamp value bigger can be selected, to realize the guarantor to optocoupler U2
Shield, its protection philosophy are：It is especially high as controlled copper platinum short circuit between IC failures or PCB layout when there are abnormal conditions
When the photosensitive tube short circuit of volt circuit and optocoupler U2, high voltage grounding shunt can be protected optocoupler U2 will not be by by the first voltage-stabiliser tube ZD1
High voltage is burnt out, and is protected safety device, is made product safer.
In the present embodiment, negative voltage generating circuit 20 includes the 6th capacitance C20 and the 3rd diode D20, the 6th capacitance
The pulse output end P-OUT of one end connection DC-DC circuit 10 of C20, the other end connect the anode of the 3rd diode D20, this
The minus earth of three diode D20, the anode of the 3rd diode D20 are also connected with the cathode of the 4th diode D21, and the 4th
The anode of diode D21 is also connected to the anode of the second voltage-stabiliser tube DZ20 by the 8th resistance R20, second voltage-stabiliser tube DZ20
Minus earth, the anode of second voltage-stabiliser tube DZ20 is negative pressure output terminal VGL.
In the present embodiment, the square-wave signal of the pulse output end P-OUT of DC-DC circuit 10 output is the square wave of 0V to 11V,
When the square-wave signal is in high level state, pulse output end P-OUT, the 6th capacitance C20 and the 3rd diode D20 and ground group
Into circuit, the 6th capacitance C20 charges to 11V；When the square-wave signal is in low level state, since the 6th capacitance C20 cannot dash forward
Become and keep the voltage difference of 11V, make the tie point of the 6th capacitance C20 and the 3rd diode D20 because the 6th capacitance C20 boots and produces
The voltage of raw -11V, so that the electric current from ground to the second voltage-stabiliser tube DZ20, the 8th resistance R20 and the 4th diode D21 is produced, into
One step, the anode of the second voltage-stabiliser tube DZ20 is produced negative voltage as negative pressure output terminal VGL.
It is preferred that positive pressure generation circuit 30 includes the 7th capacitance C30 and the 5th diode D30, the 7th electricity
Hold the pulse output end P-OUT of one end connection DC-DC circuit 10 of C30, the other end connects the cathode of the 5th diode D30, should
The anode of 5th diode D30 is connected to the voltage output end AVDD of DC-DC circuit 10, the cathode of the 5th diode D30
The anode of the 6th diode D31 is also connected with, the cathode of the 6th diode D31 is also connected to the 3rd by the 9th resistance R30
The cathode of voltage-stabiliser tube DZ30, the plus earth of the 3rd voltage-stabiliser tube DZ30, the cathode of the 3rd voltage-stabiliser tube DZ30 export for positive pressure
Hold VGH.
In the present embodiment, the voltage output end AVDD of DC-DC circuit 10 output DC voltage is 11V, its pulse output end
The square wave that the square-wave signal of P-OUT outputs is 0V to 11V, when the square-wave signal is in low level state, voltage output end AVDD,
5th diode D30, the 7th capacitance C30 and pulse output end P-OUT compositions circuit, the 7th capacitance C30 charge to make the 7th
The tie point of capacitance C30 and the 5th diode D30 produce 11V voltages；When the square-wave signal is in high level state, due to the 7th
Capacitance C30 cannot be mutated and keep the voltage difference of 11V, make the voltage liter of the tie point of the 7th capacitance C30 and the 5th diode D30
To 22V, which is transmitted to the cathode of the 3rd voltage-stabiliser tube DZ30 through the 6th diode D31, the 9th resistance R30, steady through the 3rd
The clamping action of pressure pipe DZ30 and make positive pressure output terminal VGH output higher than pulse output end P-OUT positive voltage, it is achieved thereby that
The boosting output of forward voltage.
In foregoing circuit structure, DC-DC circuit 10 can be appointing in booster circuit, reduction voltage circuit and polarity inversion circuit
Meaning is a kind of, and still, the preferred DC-DC circuit 10 of the present embodiment is booster circuit.In the present embodiment, negative voltage generating circuit 20 utilizes electricity
The square-wave signal for holding the bootstrapping principle that both end voltage cannot be mutated and exporting DC-DC circuit 10 carries out polarity inversion processing, from
And produce negative voltage and be supplied to subsequent conditioning circuit.Meanwhile positive pressure generation circuit 30 is electric by DC-DC also by capacitance bootstrapping principle
The square-wave signal that road 10 exports carries out boost conversion, so as to provide higher voltage for subsequent conditioning circuit.The utility model is compared to existing
For having technology, only needing a DC-DC circuit to coordinate, simple capacitance boostrap circuit can be realized as boost conversion and negative pressure is defeated
Go out, without being further added by DC-DC boost modules and DC-DC antipole modular converters, so it is suitable for for the less electricity of current needs
Road provides positive voltage and negative voltage, while can also reduce product cost, reduce interference.
The above is the utility model preferred embodiment, is not intended to limit the present invention, all in this practicality
Modification, equivalent substitution or improvement made in new technical scope etc., should be included in the model that the utility model is protected
In enclosing.
Claims (3)
1. a kind of driving power, it is characterised in that include：
One transformer, its input terminal connection power grid, for will be exported after input voltage decompression transformation from output terminal；
One EMI filter circuit, its input terminal connects the output terminal of the transformer, for filtering out the high-frequency impulse pair of extraneous power grid
The interference of the interference of power supply and the power supply to extraneous power grid；
One rectification circuit, its input terminal connects the output terminal of the EMI filter circuit, for being arteries and veins by the AC rectification of input
Exported after dynamic direct current from output terminal；
One BOOST booster circuits, its input terminal connects the output terminal of the rectification circuit, for by after input voltage boosting inverter
Export DC voltage；
One PWM chip, its input terminal connects the output terminal of the rectification circuit, for output pulse width modulated signal to BOOST liters
The drive end of volt circuit, to drive BOOST booster circuits to export lasting DC voltage；
One protection detection circuit, it includes one first voltage-stabiliser tube, an optocoupler and an a reference source, the feedback end of the PWM chip
The cathode of the first voltage-stabiliser tube, the plus earth of first voltage-stabiliser tube are connected to, the photosensitive pipe collector of the optocoupler is connected to
Feedback end, its photosensitive tube emitter ground connection, the luminous tube anode of the optocoupler are connected to power end by first resistor, it shines
Tube cathode is connected to the cathode of a reference source, and second resistance, the sun of a reference source are connected between the anode and cathode of the optocoupler
Pole is grounded, its control pole is connected to the output terminal of driving power by the 4th resistance, which is also connect by the 5th resistance
Ground；
One starts control circuit, and the startup control circuit includes a rectifier bridge, and the ac input end of the rectifier bridge is in parallel
In the output terminal of transformer, the DC output end of the rectifier bridge passes through the 3rd capacitance, the 6th resistance and the 4th that are sequentially connected in series
The tie point of capacity earth, the 6th resistance and the 4th capacitance is also connected to the drain electrode of one first metal-oxide-semiconductor by one the 7th resistance, the
The tie point of six resistance and the 4th capacitance is additionally coupled to the grid of the first metal-oxide-semiconductor, and it is steady that the source electrode of the first metal-oxide-semiconductor is connected to one second
The cathode of pressure pipe, the plus earth of the second voltage-stabiliser tube, the source electrode of the first metal-oxide-semiconductor are additionally coupled to the anode of one first diode, the
For the cathode of one diode by one the 5th capacity earth, the tie point of the first diode and the 5th capacitance is PWM power ends, described
PWM power ends are used to power for PWM chip, which is additionally coupled to the cathode of one second diode, second diode
Anode be grounded by the secondary main winding of transformer；
One DC-DC circuit, its input terminal connects the output terminal of BOOST booster circuits, for the electricity for exporting BOOST booster circuits
After pressure carries out DC to DC conversion, DC voltage is exported through its voltage output end, square-wave signal is exported through its pulse output end；
One negative voltage generating circuit, it is connected to the pulse output end of DC-DC circuit, for the square wave letter for exporting DC-DC circuit
Number booted by capacitance and to be converted to negative voltage；
One positive pressure generation circuit, it is connected to the pulse output end of DC-DC circuit, for the square wave letter for exporting DC-DC circuit
Number booted by capacitance and to carry out boost conversion.
2. driving power as claimed in claim 1, it is characterised in that the cathode of a reference source also passes through sequentially connected
Two capacitances, 3rd resistor and the 5th resistance eutral grounding.
3. driving power as claimed in claim 1, it is characterised in that the feedback end passes through the first capacity earth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721383848.2U CN207304400U (en) | 2017-10-25 | 2017-10-25 | A kind of driving power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721383848.2U CN207304400U (en) | 2017-10-25 | 2017-10-25 | A kind of driving power |
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| Publication Number | Publication Date |
|---|---|
| CN207304400U true CN207304400U (en) | 2018-05-01 |
Family
ID=62273752
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721383848.2U Active CN207304400U (en) | 2017-10-25 | 2017-10-25 | A kind of driving power |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108900104A (en) * | 2018-09-10 | 2018-11-27 | 深圳市德利和能源技术有限公司 | IGBT analog device, level analog circuit and three level emulation platforms |
| CN108923774A (en) * | 2018-08-06 | 2018-11-30 | 北京电铁海丰技术发展有限公司 | A kind of switching circuit |
| CN113630001A (en) * | 2021-08-09 | 2021-11-09 | 贵州航天林泉电机有限公司 | Bootstrap-driven double-circuit positive-negative pressure independently adjustable power supply circuit |
-
2017
- 2017-10-25 CN CN201721383848.2U patent/CN207304400U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923774A (en) * | 2018-08-06 | 2018-11-30 | 北京电铁海丰技术发展有限公司 | A kind of switching circuit |
| CN108923774B (en) * | 2018-08-06 | 2023-12-19 | 北京电铁海丰技术发展有限公司 | Switching circuit |
| CN108900104A (en) * | 2018-09-10 | 2018-11-27 | 深圳市德利和能源技术有限公司 | IGBT analog device, level analog circuit and three level emulation platforms |
| CN108900104B (en) * | 2018-09-10 | 2024-04-16 | 深圳市德利和能源技术有限公司 | IGBT analog device, level analog circuit and three-level simulation platform |
| CN113630001A (en) * | 2021-08-09 | 2021-11-09 | 贵州航天林泉电机有限公司 | Bootstrap-driven double-circuit positive-negative pressure independently adjustable power supply circuit |
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