CN209299141U - A kind of adjustable voltage converter - Google Patents
A kind of adjustable voltage converter Download PDFInfo
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- CN209299141U CN209299141U CN201920084073.1U CN201920084073U CN209299141U CN 209299141 U CN209299141 U CN 209299141U CN 201920084073 U CN201920084073 U CN 201920084073U CN 209299141 U CN209299141 U CN 209299141U
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Abstract
The utility model relates to a kind of adjustable voltage converters, including filter circuit, delay circuit, reduction voltage circuit, accumulator and adjustable circuit of output voltage, the input terminal of the filter circuit is connect with positive input terminal, its output end respectively with delay circuit, the input terminal of reduction voltage circuit connects, the output end of the delay circuit and the control terminal of reduction voltage circuit connect, the output end of the reduction voltage circuit and the input terminal of accumulator connect, the output end of the accumulator and adjustable circuit of output voltage one end are connect with negative output terminal, the output end of the adjustable circuit of output voltage and the feedback end of reduction voltage circuit connect, the ground terminal of the reduction voltage circuit is connect with negative output terminal.The utility model adjustable voltage converter only needs few component that can realize and is pressed onto adjustable negative voltage transformation by positive electricity, effectively reduces system bulk, greatly improve the practicability and multifunctionality of system.
Description
Technical field
The utility model relates to drive and control of electric machine technical fields, and in particular to a kind of adjustable voltage converter.
Background technique
In motor-drive circuit, needs positive voltage and negative voltage while powering, meet the electric current in motor-drive circuit
The normal work requirement of the units such as sampling unit, velocity feedback unit, gate-drive unit.And positive voltage turns negative voltage converter
The positive voltage of input is mainly converted into negative voltage, is widely used in the army and the people such as Aeronautics and Astronautics, weapons, ship, electronics Department of Electronics
In system.With the rapid development of drive and control of electric machine technology and the promotion of system compact, the power supply of motor-drive circuit is become
The functionalization of parallel operation and integrated more stringent requirements are proposed.Currently, to turn negative voltage converter volume inclined for some general positive voltages
Greatly, output voltage is single, is unable to satisfy certain miniaturized system occasions for needing adjustable voltage.
Utility model content
The purpose of this utility model is to provide a kind of adjustable voltage converters, and the electrical appliance kit is versatile, can will input
Positive voltage be converted into adjustable negative voltage, meet the miniaturized electronics system such as Aeronautics and Astronautics, weapons, ship use.
To achieve the above object, the utility model uses following technical scheme:
A kind of adjustable voltage converter, including filter circuit, delay circuit, reduction voltage circuit, accumulator and output voltage
The input terminal of conditioned circuit, the filter circuit connect with positive input terminal, output end respectively with delay circuit, reduction voltage circuit
The control terminal of input terminal connection, the output end of the delay circuit and reduction voltage circuit connects, the output end of the reduction voltage circuit with
The input terminal of accumulator connects, and the output end of the accumulator and adjustable circuit of output voltage one end connect with negative output terminal
It connects, the feedback end of the output end of the adjustable circuit of output voltage and reduction voltage circuit connects, the ground terminal of the reduction voltage circuit and negative
Output end connection.
As a further improvement of the above technical scheme:
The filter circuit is connect using inductance L1 and filter capacitor C1, one end of the inductance L1 with positive input terminal, electricity
The sense L1 other end is connect with one end of filter capacitor C1, reduction voltage circuit input terminal, and the filter capacitor C1 other end is connected to ground.
The delay circuit includes one end and the positive input voltage of capacitor C2, resistance R3 and diode V1, the capacitor C2
The control terminal of connection, the other end and reduction voltage circuit connects, and the anode of the diode V1 is connect with negative output terminal, diode V1's
The connection of the control terminal of cathode and reduction voltage circuit, the resistance R3 are connected in parallel on the both ends of diode V1.
The accumulator includes diode V2, inductance L2, capacitor C3 and capacitor C4, the cathode and electricity of the diode V2
One end of sense L2 is connected with reduction voltage circuit output end, and the anode of the diode V2 is connected with negative output terminal, the inductance L2
The other end, one end of capacitor C3 and one end of capacitor C4 be connected to the ground, the capacitor C3 other end and the capacitor C4 other end
It is connected with negative output terminal.
The adjustable circuit of output voltage includes sampling resistor R1 and sampling resistor R2, one end the sampling resistor R1 and negative
Output end is connected, and the sampling resistor R1 other end and the one end sampling resistor R2 are connected with reduction voltage circuit feedback end, sampling resistor R2
The other end is connected to the ground, and reduction voltage circuit ground terminal is connected with negative output terminal.
As shown from the above technical solution, the utility model adjustable voltage converter only needs few component that can realize
Adjustable negative voltage transformation is pressed by positive electricity, system bulk is effectively reduced, greatly improves the practicability and more function of system
It can property.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the circuit equivalent functional block diagram of the utility model.
Specific embodiment
The utility model is described further with reference to the accompanying drawing:
As shown in Figure 1, the adjustable voltage converter of the present embodiment, including filter circuit 1, delay circuit 2, reduction voltage circuit 3,
Accumulator 4 and adjustable circuit of output voltage 5, the input terminal of filter circuit 1 are connected with positive input terminal, output end respectively with delay
Circuit 2, the input terminal of reduction voltage circuit 3 are connected, and the output end of delay circuit 2 is connected with the control terminal of reduction voltage circuit 3, reduction voltage circuit
3 output end is connected with the input terminal of accumulator 4, the output end of accumulator 4 and the input terminal of adjustable circuit of output voltage 5
It is connected with negative output terminal, the output end of adjustable circuit of output voltage 5 is connected with the feedback end of reduction voltage circuit 3, reduction voltage circuit 3
Ground terminal is connected with negative output terminal.
In the present embodiment, filter circuit 1 uses inductance L1 and capacitor C1, and delay circuit 2 is using capacitor C2 and in parallel two
Pole pipe V1 and resistance R3, reduction voltage circuit 3 use step-down voltage voltage-stablizer N1, accumulator 4 using inductance L2, diode V2 and with
The capacitor C3 and capacitor C4 of diode V2 parallel connection, adjustable circuit of output voltage 5 use resistance R1 and resistance R2；One end of inductance L1
Be connected with positive input, the inductance L1 other end, the positive terminal of capacitor C1, capacitor C2 positive terminal with step-down voltage voltage-stablizer N1's
Input terminal is connected, capacitor C1 negative pole end ground connection；The control terminal of step-down voltage voltage-stablizer N1 is connected to capacitor C2 cathode and resistance R3
Between the node of diode V1 cathode terminal, the feedback end of step-down voltage voltage-stablizer N1 is connected between resistance R1 and resistance R2,
The output end of step-down voltage voltage-stablizer N1 is connected between the cathode terminal of diode V2 and inductance L2, the inductance L2 other end and capacitor
C3 and capacitor C4 positive terminal ground connection；Ground terminal, diode V1 anode, diode V2 anode and the capacitor C3 of step-down voltage voltage-stablizer N1
It is connected with negative output with C4 negative pole end.
Positive input voltage is mainly filtered by filter circuit 1 by this example, and treated voltage signal is again
Reduced output voltage is carried out by reduction voltage circuit 3, to make final output negative value, the output capacitor in accumulator 4 is using anode
End ground connection, and negative pole end is negative output voltage value, while so that reduction voltage circuit is reached one in positive input voltage using delay circuit 2
Just start to start work after constant voltage value, by adjusting two sampling resistor values in adjustable circuit of output voltage 5, makes sampling electricity
Pressure value passes through 3 feedback end feedback regulation of reduction voltage circuit, reaches the output adjustable purpose of negative voltage.
As shown in Fig. 2, positive input voltage after LC filter circuit is filtered, makes to be input to the defeated of reduction voltage circuit
Enter to hold voltage stabilization, using the reduction voltage circuit for being internally integrated MOS switch pipe, when internal MOS switch pipe is opened, diode
V2 shutdown, reduction voltage circuit and inductance L2 are formed into a loop, and the upper end inductance L2 is positive at this time, and lower end is negative；When internal MOS switch pipe is closed
When disconnected, due to inductance L2 afterflow, polarity of voltage reversion on inductance, upper end is negative, and lower end is positive, at this time with capacitor C3, C4 and
Diode V2 forming circuit, while charging to capacitor C3 and capacitor C4, two capacitor lower ends in parallel are positive, and upper end is negative, from
And form negative voltage output；It is right by changing the resistance value of sampling resistor R1 and sampling resistor R2 in adjustable circuit of output voltage
Negative output terminal voltage is divided, and the feedback end of the value feedback after partial pressure to reduction voltage circuit is compared with internal reference voltage, error
The drive signal duty cycle for changing MOS switch pipe after amplification by internal control chip, to adjust output voltage values；Due to
It is non-isolated converter that this positive voltage, which turns negative voltage transition device, has the characteristics that dynamic response is fast, generates on startup biggish
Starting current is easy to burn out device, therefore starting current is excessive in order to prevent, uses in reduction voltage circuit input terminal and is made of RC
Delay circuit, reduction voltage circuit just normally starts after positive input voltage reaches certain voltage value, it is ensured that the adjustable negative electricity of final output
Pressure.
Embodiment described above is only that preferred embodiments of the present invention are described, not practical to this
Novel range is defined, and under the premise of not departing from the spirit of the design of the utility model, those of ordinary skill in the art are to this
The various changes and improvements that the technical solution of utility model is made should all fall into the protection that the utility model claims book determines
In range.
Claims (5)
1. a kind of adjustable voltage converter, it is characterised in that: including filter circuit, delay circuit, reduction voltage circuit, accumulator and
The input terminal of adjustable circuit of output voltage, the filter circuit is connect with positive input terminal, output end respectively with delay circuit, drop
The input terminal of volt circuit connects, and the output end of the delay circuit and the control terminal of reduction voltage circuit connect, the reduction voltage circuit
The connection of the input terminal of output end and accumulator, the output end of the accumulator and adjustable circuit of output voltage one end with it is negative
Output end connection, the output end of the adjustable circuit of output voltage and the feedback end of reduction voltage circuit connect, the reduction voltage circuit
Ground terminal is connect with negative output terminal.
2. adjustable voltage converter according to claim 1, it is characterised in that: the filter circuit uses inductance L1 and filter
Wave capacitor C1, one end of the inductance L1 are connect with positive input terminal, one end of the inductance L1 other end and filter capacitor C1, decompression electricity
The connection of road input terminal, the filter capacitor C1 other end are connected to ground.
3. adjustable voltage converter according to claim 1, it is characterised in that: the delay circuit includes capacitor C2, electricity
Resistance R3 and diode V1, one end of the capacitor C2 are connect with positive input voltage, the control terminal connection of the other end and reduction voltage circuit,
The anode of the diode V1 is connect with negative output terminal, and the cathode of diode V1 and the control terminal of reduction voltage circuit connect, the electricity
Resistance R3 is connected in parallel on the both ends of diode V1.
4. adjustable voltage converter according to claim 1, it is characterised in that: the accumulator include diode V2,
Inductance L2, capacitor C3 and capacitor C4, the cathode of the diode V2 and one end of inductance L2 are connected with reduction voltage circuit output end,
The anode of the diode V2 is connected with negative output terminal, and the one of the other end of the inductance L2, one end of capacitor C3 and capacitor C4
End is connected to the ground, and the capacitor C3 other end and the capacitor C4 other end are connected with negative output terminal.
5. adjustable voltage converter according to claim 1, it is characterised in that: the adjustable circuit of output voltage includes adopting
Sample resistance R1 and the one end sampling resistor R2, the sampling resistor R1 are connected with negative output terminal, the sampling resistor R1 other end and sampling
The one end resistance R2 is connected with reduction voltage circuit feedback end, and the sampling resistor R2 other end is connected to the ground, reduction voltage circuit ground terminal with bear it is defeated
Outlet is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920084073.1U CN209299141U (en) | 2019-01-17 | 2019-01-17 | A kind of adjustable voltage converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920084073.1U CN209299141U (en) | 2019-01-17 | 2019-01-17 | A kind of adjustable voltage converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209299141U true CN209299141U (en) | 2019-08-23 |
Family
ID=67642459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920084073.1U Active CN209299141U (en) | 2019-01-17 | 2019-01-17 | A kind of adjustable voltage converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209299141U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112701906A (en) * | 2020-12-11 | 2021-04-23 | Tcl华星光电技术有限公司 | Direct current voltage transformation circuit |
-
2019
- 2019-01-17 CN CN201920084073.1U patent/CN209299141U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112701906A (en) * | 2020-12-11 | 2021-04-23 | Tcl华星光电技术有限公司 | Direct current voltage transformation circuit |
| WO2022121023A1 (en) * | 2020-12-11 | 2022-06-16 | Tcl华星光电技术有限公司 | Direct current transformer circuit |
| US11996775B2 (en) | 2020-12-11 | 2024-05-28 | Tcl China Star Optoelectronics Technology Co., Ltd. | DC transformer circuit |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Shi Dong Inventor after: Li Caixia Inventor after: Huang Liping Inventor after: Wu Hao Inventor after: Li Yikun Inventor before: Shi Dong Inventor before: Li Caixia Inventor before: Huang Liping Inventor before: Wu Hao Inventor before: Li Yikun |
|
| CB03 | Change of inventor or designer information |