CN209299147U - A kind of circuit and electrical equipment controlling service voltage according to current sample - Google Patents
A kind of circuit and electrical equipment controlling service voltage according to current sample Download PDFInfo
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- CN209299147U CN209299147U CN201821917752.4U CN201821917752U CN209299147U CN 209299147 U CN209299147 U CN 209299147U CN 201821917752 U CN201821917752 U CN 201821917752U CN 209299147 U CN209299147 U CN 209299147U
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- transformer
- controller
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Abstract
The utility model discloses a kind of circuits and electrical equipment that service voltage is controlled according to current sample, are related to industrial automation, wherein a kind of circuit that service voltage is controlled according to current sample, comprising: controller；The input terminal of the controller is connect with current sampling circuit, and the current sampling circuit is connect with current sample control circuit, and the current sample control circuit is also connected with load；The output end of the controller is connect with transformer (B), and the transformer (B) and the load connect；The current sample control circuit, for controlling the current sampling circuit to load progress current sample or not sampling；The controller, for controlling the output voltage of the transformer (B) according to the current sample.The problem of it is excessive to can solve commercial power fluctuation, be easy to cause electrical equipment overvoltage or under-voltage work, provides a stable operating voltage for electrical equipment.
Description
Technical field
The utility model relates to industrial automation, specifically a kind of electricity that service voltage is controlled according to current sample
Road and electrical equipment.
Background technique
In industrial electric automation field, due to commercial power fluctuate it is excessive, be easy to cause electrical equipment overvoltage or
Under-voltage work, if the electronic component that the work of electrical equipment long-time overvoltage is be easy to cause in electrical equipment damages, such as
The work of fruit electrical equipment under-voltage be easy to cause electrical equipment to shut down, and shutdown then needs artificially to be switched on, if breaking built in electrical equipment
Electricity powers on playback clearing routine, then goods in process can then become discard, as milling machine or lathe are being processed
Product, if milling machine or lathe are shut down, goods in process can then become discard, cause economic loss.
Utility model content
In view of this, the present invention provides it is a kind of according to current sample control service voltage circuit and electrical equipment,
It is easy to cause electrical equipment overvoltage or under-voltage to work to solve the problem of that commercial power fluctuation is excessive, is electrical equipment
One stable operating voltage is provided.
In a first aspect, the utility model provides a kind of circuit for controlling service voltage according to current sample, comprising:
Controller；
The input terminal of the controller is connect with current sampling circuit, the current sampling circuit and current sample control electricity
Road connection, the current sample control circuit are also connected with load；
The output end of the controller is connect with transformer, and the transformer and the load connect；
The current sample control circuit, for control the current sampling circuit to the load carry out current sample or
It does not sample；
The controller, for controlling the output voltage of the transformer according to the current sample.
Preferably, the current sample control circuit, comprising: sampling switch and field-effect tube；
One end of the sampling switch is connect with ground or power supply, the other end of the sampling switch and the door of field-effect tube
Pole connection；
One end of the field-effect tube is connect with the current sampling circuit, and the other end of the field-effect tube is born with described
Carry connection；
The sampling switch, for controlling the field-effect tube conducting or being not turned on.
Preferably, the load has connecting terminal；
The connecting terminal is connect with the transformer.
Preferably, a kind of circuit controlling service voltage according to current sample, further includes:
General supply；
The general supply is connect with the transformer and the controller respectively；
The general supply, for powering for the transformer and the controller.
Preferably, the output end of the controller is connect with the coil of several relays；
The both ends of the normal opened contact of several relays respectively with primary coil of the transformer and the general supply
Connection；
Whether the controller, the coil for controlling several relays charge；
Whether the coil of several relays, the normal opened contact for controlling several relays are attracted.
Preferably, the controller is single-chip microcontroller；
The input I/O port of the single-chip microcontroller is connect with the current sampling circuit；
The output I/O port of the single-chip microcontroller is connect by several relays with primary coil of the transformer；
The single-chip microcontroller, the number of turns by controlling described primary coil control the output voltage of the transformer.
Second aspect, the utility model provide a kind of electrical equipment characterized by comprising
Such as a kind of above-mentioned circuit for controlling service voltage according to current sample；
The load is electrical equipment.
The utility model at least has the following beneficial effects:
The utility model provides a kind of circuit and electrical equipment that service voltage is controlled according to current sample, to solve industry
It is excessive with electro-mechanical wave, the problem of be easy to causeing electrical equipment overvoltage or under-voltage to work, one is provided for electrical equipment and is put down
Steady operating voltage.
Detailed description of the invention
By the description below with reference to attached drawing to the utility model embodiment, the above-mentioned and other mesh of the utility model
, feature and advantage it is apparent, in the accompanying drawings:
A kind of voltage-operated device and the transformer circuit functional block diagram using it that Fig. 1 is the utility model embodiment；
Fig. 2 is a kind of circuit and electrical equipment electricity that service voltage is controlled according to current sample of the utility model embodiment
Road functional block diagram.
Specific embodiment
The utility model is described below based on embodiment, but it is worth noting that, the utility model is simultaneously unlimited
In these embodiments.It is detailed to describe some specific detail sections below in the datail description of the utility model.So
And for the part of no detailed description, the utility model can also be understood completely in those skilled in the art.
In addition, it should be understood by one skilled in the art that provided attached drawing is simply to illustrate that the utility model
Objects, features and advantages, attached drawing are not to be actually drawn to scale.
Meanwhile unless the context clearly requires otherwise, "include", "comprise" etc. otherwise throughout the specification and claims
Similar word should be construed as the meaning for including rather than exclusive or exhaustive meaning；That is, being " including but not limited to "
Meaning.
A kind of voltage-operated device and the transformer circuit functional block diagram using it that Fig. 1 is the utility model embodiment.
As shown in Figure 1, a kind of voltage-operated device, comprising: controller；Controller, it is electric with voltage setting circuit and voltage selection respectively
Road connection；Voltage setting circuit is connect with primary coil of transformer B；Voltage setting circuit needs voltage (specified for setting
Voltage)；Controller controls primary coil the number of turns of transformer B for voltage as needed by voltage selecting circuit.Pass through voltage
Initialization circuit directly sets the voltage rating of load, and voltage rating has mark on the nameplate of load.It can solve different electrical
Equipment needs the problem of different transformers, and the utility model can be according to electrical equipment to voltage rating difference, and automatic adjustment supplies
The voltage rating of electricity.
In Fig. 1, a kind of voltage-operated device, further includes: general supply E；General supply E, respectively with transformer B and controller
Connection；General supply E, for powering for transformer B and controller.
In Fig. 1, voltage selecting circuit is several relays；The output end of controller and the coil of several relays
Connection；The both ends of the normal opened contact of several relays are connect with primary coil of transformer B and general supply E respectively；Controller is used
Whether charged in the coil for controlling several relays；The coil of several relays, for controlling the normal of several relays
Open whether contact is attracted.Specific control mode can be detailed in following description.
In Fig. 1, voltage setting circuit is that perhaps touch screen G key or touch screen G are used to set the volume loaded key
Constant voltage.
In Fig. 1, controller is single-chip microcontroller C；The input I/O port of single-chip microcontroller C is connect with voltage setting circuit；Single-chip microcontroller C's
Output I/O port is connect by voltage selecting circuit with primary coil of transformer B；Single-chip microcontroller C, by the number of turns control for controlling primary coil
The output voltage of transformer B processed.
In Fig. 1, a kind of a kind of transformer, comprising: voltage-operated device as above.
Fig. 2 is a kind of circuit and electrical equipment electricity that service voltage is controlled according to current sample of the utility model embodiment
Road functional block diagram.As shown in Fig. 2, a kind of circuit for controlling service voltage according to current sample, comprising: controller；Controller
Input terminal is connect with current sampling circuit, and current sampling circuit is connect with current sample control circuit, current sample control circuit
Also connected with load；The output end of controller is connect with transformer B, and transformer B and load connect；Current sample control circuit,
For controlling current sampling circuit to load progress current sample or not sampling；Controller becomes for being controlled according to current sample
The output voltage of depressor B.It is excessive to solve commercial power fluctuation, it be easy to cause electrical equipment overvoltage or under-voltage to work
Problem provides a stable operating voltage for electrical equipment.
In Fig. 2, specifically, the rated current of load needs to be determined according to load, it is on the books on the nameplate of load
Rated current.When current sampling circuit is greater than rated current, then the output voltage of controller control transformer B becomes smaller；Work as electric current
Sample circuit is less than rated current, then the output voltage change of controller control transformer B is beaten big, to complete to load supplying electricity
The control of pressure.
In Fig. 2, current sample control circuit, comprising: sampling switch SPST1 and field-effect tube Q1；Sampling switch SPST1
One end with ground GND or power supply connect, the other end of sampling switch SPST1 is connect with the gate pole of field-effect tube Q1；Field-effect
One end of pipe Q1 is connect with current sampling circuit, and the other end of field-effect tube Q1 and load connect；Sampling switch SPST1, is used for
Control field-effect tube Q1 conducting is not turned on.In Fig. 2, field-effect tube Q1 uses P-channel enhancement type FET, P-channel
Enhanced field-effect tube gate pole is connect by first resistor R2 and sampling switch SPST1 with ground GND, when switch SPST1 closure,
The input I/O port of field-effect tube Q1 conducting, single-chip microcontroller C is connected to by sampling resistor R2 with load, and single-chip microcontroller C can measure load
Size of current；When single-chip microcontroller C is greater than rated current by sampling resistor R2, then single-chip microcontroller C controls the output voltage of transformer B
Become smaller；When single-chip microcontroller C is less than rated current by sampling resistor R2, then the output voltage change that single-chip microcontroller C controls transformer B is beaten
Greatly, to complete the control to load supplying voltage.
In Fig. 2, load has connecting terminal A1；Connecting terminal A1 is connect with transformer B.
In Fig. 2, a kind of circuit controlling service voltage according to current sample, further includes: general supply E；General supply E, point
It is not connect with transformer B and controller；General supply E, for powering for transformer B and controller.
In fig. 1 and 2, the line of the output end of controller and several relays (that is, voltage-operated device in Fig. 1)
Circle connection；The both ends of the normal opened contact of several relays are connect with primary coil of transformer B and general supply E respectively；Controller,
Whether the coil for controlling several relays charges；The coil of several relays, for controlling several relays
Whether normal opened contact is attracted.
In fig. 1 and 2, controller can be the controllers such as single-chip microcontroller or PLC, but the controller of the utility model
Preferably single-chip microcontroller C；Because the controllers such as PLC are generally more expensive, price is generally arrived between tens of thousands of thousands of, but single
The price of piece machine is between several maos to several yuan, therefore the controller of the utility model is preferably single-chip microcontroller C.Such as: single-chip microcontroller
The power end Vcc1 of C8051F121, single-chip microcontroller C8051F121 connect power supply, the end the GND ground connection of single-chip microcontroller C8051F121.Monolithic
Machine C8051F121 is a fully-integrated microcontroller of monolithic composite signal system that Silicon Labs company releases.
Single-chip microcontroller C8051F121 has the single-chip microcontroller of the 64 foot TQFP encapsulation of 32 number I/O pins, and combines high-precision
Analog digital converter and a high-throughput 8051CPU, this makes ideal of the single-chip microcontroller C8051F121 as the utility model
Selection.In fig. 1 and 2, the input I/O port of single-chip microcontroller C is connect with current sampling circuit；If the output I/O port of single-chip microcontroller C passes through
A dry relay is connect with primary coil of transformer B；Single-chip microcontroller C, the number of turns by controlling primary coil control the output of transformer B
Voltage.
In fig. 1 and 2, controller is by taking single-chip microcontroller C as an example, if key or touch screen G have been set the specified of load
Voltage or single-chip microcontroller C need to adjust the output voltage of transformer B, such as: the normal opened contact connection of the first relay K1 and n-th
The number of turns is the voltage rating or monolithic that key or touch screen G have been set load between the normal opened contact of relay Kn
Machine C needs to adjust the output voltage of transformer B, then the output I/O port 5 of single-chip microcontroller is connect with the coil of the first relay K1, and first
The both ends of the normal opened contact of relay K1 are connect with primary coil of transformer B and general supply E respectively；When the output I/O port of single-chip microcontroller
5 output high level, then the coil electrification of the first relay K1, the normal opened contact of the first relay K1 are attracted, the original of transformer B
Coil is connected to general supply E；Meanwhile the output I/O port 7 of single-chip microcontroller is connect with the coil of the n-th relay Kn, the n-th relay Kn's
The both ends of normal opened contact are connect with primary coil of transformer B and general supply E respectively；When the output I/O port 7 of single-chip microcontroller exports high electricity
Flat, then the coil electrification of the n-th relay Kn, the normal opened contact of the n-th relay Kn are attracted, primary coil and general supply of transformer B
E connection；The number of turns of primary coil of transformer B at this time is to connect with the normal opened contact of the first relay K1 and the n-th relay Kn
Normal opened contact between the number of turns.Specifically, the number of several relays can be according to of the remaining output IO of single-chip microcontroller
Number determines.
As the preferred scheme of the utility model, one end of primary coil of transformer B is directly connect with general supply E, in this way
Only need to control the control that primary coil the number of turns of transformer B can be completed in a relay in several relays every time.
Specifically, in fig. 1 and 2, controller is selected as single-chip microcontroller C；General supply E passes through power-switching circuit F and list
The C connection of piece machine, the supply voltage of general single-chip microcontroller C is 5V or 3.3V, therefore power-switching circuit F is reduction voltage circuit, drop
Volt circuit is the common circuit of this field, herein without being described in detail.Meanwhile single-chip microcontroller C also needs to connect with crystal oscillating circuit D
It connects, crystal oscillating circuit D can correspond to singlechip chip handbook according to single-chip microcontroller model and be selected.
In fig. 1 and 2, the utility model provides a kind of electrical equipment, comprising: as above a kind of to be controlled according to current sample
The circuit of service voltage；Load is electrical equipment A.
Embodiment described above is only to express the embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Therefore it cannot be interpreted as that a limitation on the scope of the patent of the present invention.It should be pointed out that the ordinary skill people of this field
For member, without departing from the concept of the premise utility, several deformations, same replacement can also be made, improved etc., these
Belong to the protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (6)
1. a kind of circuit for controlling service voltage according to current sample characterized by comprising
Controller；
The input terminal of the controller is connect with current sampling circuit, and the current sampling circuit and current sample control circuit connect
It connects, the current sample control circuit is also connected with load；
The output end of the controller is connect with transformer (B), and the transformer (B) and the load connect；
The current sample control circuit, for controlling the current sampling circuit to load progress current sample or not adopting
Sample；
The controller, for controlling the output voltage of the transformer (B) according to the current sample；
Wherein, the controller is single-chip microcontroller (C)；The input I/O port of the single-chip microcontroller (C) is connect with the current sampling circuit；
The output I/O port of the single-chip microcontroller (C) is connect by several relays with primary coil of the transformer (B)；The single-chip microcontroller
(C), the output voltage of the transformer (B) is controlled by controlling the number of turns of described primary coil.
2. a kind of circuit for controlling service voltage according to current sample according to claim 1, it is characterised in that:
The current sample control circuit, comprising: sampling switch (SPST1) and field-effect tube (Q1)；
One end of the sampling switch (SPST1) with ground (GND) or power supply connect, the sampling switch (SPST1) it is another
End is connect with the gate pole of field-effect tube (Q1)；
One end of the field-effect tube (Q1) is connect with the current sampling circuit, the other end of the field-effect tube (Q1) and institute
State load connection；
The sampling switch (SPST1), for controlling the field-effect tube (Q1) conducting or being not turned on.
3. a kind of circuit for controlling service voltage according to current sample according to claim 1, it is characterised in that:
The load has connecting terminal (A1)；
The connecting terminal (A1) connect with the transformer (B).
4. a kind of circuit for controlling service voltage according to current sample according to claim 1, which is characterized in that further include:
General supply (E)；
The general supply (E), connect with the transformer (B) and the controller respectively；
The general supply (E), for powering for the transformer (B) and the controller.
5. a kind of circuit for controlling service voltage according to current sample according to claim 4, it is characterised in that:
The output end of the controller is connect with the coil of several relays；
The both ends of the normal opened contact of several relays respectively with primary coil of the transformer (B) and the general supply
(E) it connects；
Whether the controller, the coil for controlling several relays charge；
Whether the coil of several relays, the normal opened contact for controlling several relays are attracted.
6. a kind of electrical equipment characterized by comprising
A kind of circuit that service voltage is controlled according to current sample as described in claim any one of 1-5；
The load is electrical equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821917752.4U CN209299147U (en) | 2018-11-20 | 2018-11-20 | A kind of circuit and electrical equipment controlling service voltage according to current sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821917752.4U CN209299147U (en) | 2018-11-20 | 2018-11-20 | A kind of circuit and electrical equipment controlling service voltage according to current sample |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209299147U true CN209299147U (en) | 2019-08-23 |
Family
ID=67645678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821917752.4U Expired - Fee Related CN209299147U (en) | 2018-11-20 | 2018-11-20 | A kind of circuit and electrical equipment controlling service voltage according to current sample |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209299147U (en) |
-
2018
- 2018-11-20 CN CN201821917752.4U patent/CN209299147U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190823 Termination date: 20201120 |
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| CF01 | Termination of patent right due to non-payment of annual fee |