CN106253267A - Supply self adaptation adjusting apparatus and method - Google Patents
Supply self adaptation adjusting apparatus and method Download PDFInfo
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- CN106253267A CN106253267A CN201610629520.8A CN201610629520A CN106253267A CN 106253267 A CN106253267 A CN 106253267A CN 201610629520 A CN201610629520 A CN 201610629520A CN 106253267 A CN106253267 A CN 106253267A
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- 238000001514 detection method Methods 0.000 claims abstract description 18
- 239000000853 adhesive Substances 0.000 claims description 34
- 230000001070 adhesive effect Effects 0.000 claims description 34
- 230000005611 electricity Effects 0.000 claims description 23
- 238000005485 electric heating Methods 0.000 abstract description 4
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 230000006870 function Effects 0.000 description 5
- 238000007689 inspection Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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Abstract
The invention provides a kind of supply self adaptation adjusting apparatus, including power supply switch circuit, power self test circuit and control circuit；Power self test circuit is currently accessed voltage between phases and the phase angle of power supply for detection, and is currently accessed the type of power supply according to voltage between phases and phase angle judgement；Power self test circuit and power supply switch circuit are connected to control circuit, control circuit switches to the default connected mode corresponding with the type being currently accessed power supply for the connected mode controlling described power supply switch circuit, and controls power supply switch circuit and be connected to be currently accessed power supply.Additionally, present invention also offers a kind of supply self adaptation method of adjustment.The supply self adaptation adjusting apparatus of the present invention and method so that the auxiliary equipments such as electric heating device can be applicable to different power supplys, improve the versatility of auxiliary equipment.Further, when power supply occurs abnormal, it is possible to automatic cutting equipment and the connection accessing power supply, thus ensure that the reliability of equipment.
Description
Technical field
The present invention relates to technical field of auxiliary equipment, particularly relate to a kind of supply self adaptation adjusting apparatus and method.
Background technology
Due to the rated voltage the most difference in each area (national), the world, such as, the rated voltage of European Union is 380V
～415V (three-phase electricity), 220V～240V (single-phase electricity)；North America: 220V (three-phase is without center line), 208V or 230V (single-phase electricity)；In
State: 380V (three-phase is without center line), 220V (single-phase electricity).Owing to the rated voltage of different regions is different, cause the auxiliary electricity of correspondence
The standard of the additional devices such as heating is different, and electric heating device wiring in the case of three-phase electricity or single-phase electricity is the most otherwise varied, because of
And cause product category various and poor universality.
Summary of the invention
In view of the problem of the auxiliary equipment poor universality that above-mentioned power supply difference causes, it is an object of the invention to provide one
Supply self adaptation adjusting apparatus and method, enable the auxiliary equipment being connected with power supply to be applicable to various types of power supply, improves
The versatility of auxiliary equipment.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of supply self adaptation adjusting apparatus, including:
Power supply switch circuit；
Power self test circuit, is currently accessed voltage between phases and the phase angle of power supply for detection, and according to described alternate electricity
The type of power supply it is currently accessed described in pressure and the judgement of described phase angle；Wherein, the type being currently accessed power supply described in includes single-phase
Power supply and three phase mains；
Control circuit, described power self test circuit and described power supply switch circuit are connected to described control circuit, described
Control circuit switches to corresponding with the described type being currently accessed power supply for the connected mode controlling described power supply switch circuit
Default connected mode, and control described power supply switch circuit be connected to described in be currently accessed power supply.
Wherein in an embodiment, described power supply switch circuit includes the first relay, the second relay, the 3rd relay
Device, the 4th relay, the first load R1, the second load R2 and the 3rd load R3；
The coil of described first relay, the coil of described second relay, the coil of described 3rd relay and institute
The coil stating the 4th relay is connected to described control circuit；The contact KA1 series connection of described first relay is described first negative
Carrying R1 and form the first branch road, the described second load R2 of the contact KA2 of described second relay series connection forms the second branch road, and described the
The described 3rd load R3 of contact KA3 series connection of three relays forms the 3rd branch road；The contact KA4 of described 4th relay forms the
Four branch roads；
First end of described first branch road, the first end of described second branch road, the first end of described 3rd branch road and institute
State the first end of the 4th branch road be respectively connecting to described in be currently accessed power supply；Second end of described first branch road, described second
Second end on road and the second end of described 3rd branch road link together, and form common port, and the second end of described 4th branch road is even
It is connected to described common port.
Wherein in an embodiment, when the described type being currently accessed power supply is three-phase three-wire system power supply, described control
Circuit processed controls the first end of the first end of described first branch road, the first end of described second branch road and described 3rd branch road respectively
Be currently accessed the first phase of power supply, the second phase and third phase described in being connected to, and control described first relay contact KA1,
The contact KA2 of described second relay and the contact KA3 adhesive of described 3rd relay, the contact KA4 of described 4th relay
It is off.
Wherein in an embodiment, when the described type being currently accessed power supply is three-phase four-wire system power supply, described control
Circuit processed controls the first end of the first end of described first branch road, the first end of described second branch road and described 3rd branch road respectively
The first phase of power supply, the second phase and third phase it is currently accessed described in being connected to；First end of described 4th branch road is connected to described
It is currently accessed the zero line of power supply, and controls the contact KA1 of described first relay, the contact KA2 of described second relay, described
The contact KA3 of the 3rd relay and the equal adhesive of contact KA4 of described 4th relay.
Wherein in an embodiment, when the described type being currently accessed power supply is single phase poaer supply, described control circuit
The first end controlling the first end of described first branch road, the first end of described second branch road and described 3rd branch road is connected to institute
State the live wire being currently accessed power supply, the first end of described 4th branch road be connected to described in be currently accessed the zero line of power supply, and control
The contact KA1 of described first relay, the contact KA2 of described second relay, the contact KA3 of described 3rd relay and described
The equal adhesive of contact KA4 of the 4th relay.
Wherein in an embodiment, described first relay, described second relay and described 3rd relay are
The time relay；
When described control circuit for determining the time delay of described first relay according to the output valve of the random function preset
Between, the delay time of described second relay and the delay time of described 3rd relay, and control described first chronologically and continue
The contact KA1 of electrical equipment, the contact KA2 of described second relay and the contact KA3 adhesive successively of described 3rd relay.
Wherein in an embodiment, described power supply switch circuit also includes current detection circuit, described current detecting electricity
Road includes the first current measuring element FA1, the second current measuring element FA2 and the inspection of the 3rd electric current being connected with described control circuit
Survey element FA3；
Described first current measuring element FA1 is arranged in series on described first branch road, is used for detecting described first branch road
Operating current；Described second current measuring element FA2 is arranged in series on the second branch road, for detecting described second branch road
Operating current；Described 3rd current measuring element FA3 is arranged in series on the 3rd branch road, for detecting the work of described 3rd branch road
Make electric current.
Wherein in an embodiment, when the described type being currently accessed power supply is three phase mains, described control circuit
The first end controlling the first end of described first branch road, the first end of described second branch road and described 3rd branch road is respectively connecting to
Described the first phase of power supply, the second phase and the third phase of being currently accessed, the first end of described 4th branch road is connected to described currently connect
Enter the zero line of power supply；
The most described control circuit control the contact KA1 of described first relay, the contact KA2 of described second relay and
The contact KA3 adhesive of described 3rd relay, and when the current deviation rate of described power supply switch circuit is more than or equal to presetting partially
Rate, controls the contact KA4 adhesive of described 4th relay or disconnects described power supply switch circuit and described be currently accessed power supply
Connection.
Additionally, present invention also offers a kind of supply self adaptation method of adjustment, comprise the steps:
Detection is currently accessed voltage between phases and the phase angle of power supply；
The type of power supply it is currently accessed according to described voltage between phases and the judgement of described phase angle；
Control the connected mode of described power supply switch circuit and switch to corresponding with the described type being currently accessed power supply pre-
If connected mode, and control described power supply switch circuit be connected to described in be currently accessed power supply.
Wherein in an embodiment, when the described type being currently accessed power supply is three phase mains, described method is also wrapped
Include:
The first end controlling the first end of the first branch road, the first end of the second branch road and the 3rd branch road is respectively connecting to described
Be currently accessed the first phase of power supply, the second phase and third phase, the first end of described 4th branch road be connected to described in be currently accessed electricity
The zero line in source；
Control the contact KA1 of the first relay, the contact KA2 of the second relay and the contact KA3 adhesive of the 3rd relay；
Obtain the operating current of the first branch road, the operating current of the second branch road and the operating current of the 3rd branch road respectively；
Operating current, the operating current of described second branch road and the work of described 3rd branch road according to described first branch road
The current deviation rate of Current calculation power supply switch circuit；
Judge that the current deviation rate of described power supply switch circuit whether more than or equal to predetermined deviation rate, the most then controls
The contact KA4 adhesive of described 4th relay or disconnect described power supply switch circuit and the described connection being currently accessed power supply；If
No, then continue to obtain the operating current of each branch road.
Wherein in an embodiment, described method also includes:
Operating current, the operating current of described second branch road and the work of described 3rd branch road according to described first branch road
Electric current calculates max line electric current, minimum line electric current and average line electric current respectively；
According to described max line electric current and described minimum line Current calculation line current extreme difference；
Current deviation rate according to power supply switch circuit described in described line current extreme difference and described average line Current calculation.
Wherein in an embodiment, when the described type being currently accessed power supply is three phase mains, described method includes:
The first end controlling the first end of described first branch road, the first end of described second branch road and described 3rd branch road divides
Be currently accessed the first phase of power supply, the second phase and third phase described in not being connected to, and control the contact KA1 of the first relay,
The contact KA2 of two relays and the contact KA3 adhesive of the 3rd relay, and the contact KA4 of the 4th relay is off；
Or, control the of the first end of described first branch road, the first end of described second branch road and described 3rd branch road
One end is currently accessed the first phase of power supply, the second phase and third phase described in being respectively connecting to, and the first end of described 4th branch road is even
It is currently accessed the zero line of power supply described in being connected to, and controls the contact KA1 of described first relay, the contact of described second relay
KA2, the contact KA3 of described 3rd relay and the equal adhesive of contact KA4 of described 4th relay.
Wherein in an embodiment, when the described type being currently accessed power supply is single phase poaer supply, described method is also wrapped
Include:
The first end controlling the first end of the first branch road, the first end of the second branch road and the 3rd branch road is connected to described working as
The live wire of front access power supply, the first end of the 4th branch road be connected to described in be currently accessed the zero line of power supply；
Control the contact KA1 of described first relay, the contact KA2 of described second relay, described 3rd relay
Contact KA3 and the equal adhesive of contact KA4 of described 4th relay.
Wherein in an embodiment, described method also includes:
Output valve according to default random function determines the delay time of the first relay, the prolonging of the second relay respectively
Time time and the delay time of the 3rd relay；Wherein, the delay time of the first relay, the delay time of the second relay
Different with the delay time of the 3rd relay；
Continue according to delay time, the delay time of described second relay and the described 3rd of described first relay respectively
The delay time of electrical equipment, controls the contact of described first relay, the contact of described second relay and the described 3rd chronologically
The contact KA3 adhesive successively of relay.
The invention has the beneficial effects as follows:
The supply self adaptation adjusting apparatus of the present invention and method, be currently accessed electricity by power self test electric circuit inspection judgement
The type in source, control circuit controls the connected mode of described power supply switch circuit and switches to and the described type being currently accessed power supply
Corresponding default connected mode, so that the auxiliary equipments such as electric heating device can be applicable to different power supplys, it is not necessary to carry out
Adjust the work such as wiring or lectotype selection, improve the versatility of auxiliary equipment, it is ensured that auxiliary equipment can normally work.And
And, when power supply occurs abnormal, it is possible to automatic cutting equipment and the connection accessing power supply, thus ensure that the reliability of equipment.
Accompanying drawing explanation
Fig. 1 is the theory diagram of supply self adaptation adjusting apparatus one embodiment of the present invention；
Circuit theory diagrams when Fig. 2 is that in Fig. 1, power supply switch circuit accesses three phase mains；
Fig. 3 is circuit theory diagrams during power supply switch circuit access single phase poaer supply in Fig. 1；
Fig. 4 is the flow chart of supply self adaptation method of adjustment one embodiment of the present invention；
The control flow chart of one embodiment when Fig. 5 is to access three phase mains；
The control flow chart of one embodiment when Fig. 6 is to access single phase poaer supply.
Detailed description of the invention
In order to make technical scheme clearer, below in conjunction with accompanying drawing, the supply self adaptation of the present invention is adjusted
Device and method is described in further detail.Should be appreciated that specific embodiment described herein is only in order to explain the present invention
It is not intended to limit the present invention.It should be noted that in the case of not conflicting, in embodiment in the application and embodiment
Feature can be mutually combined.
As it is shown in figure 1, the invention provides a kind of supply self adaptation adjusting apparatus 10, including power supply switch circuit 300, electricity
Source self-checking circuit 100 and control circuit 200, wherein, power self test circuit 100 and power supply switch circuit 300 are connected to control
Circuit 200 processed, control circuit 200 can use the microcontroller such as single-chip microcomputer, DSP or FPGA, and certainly, control circuit 200 also may be used
The control circuit 200 of function is controlled to use other to have.
After the auxiliary equipments such as electric heater power on, power self test circuit 100 is currently accessed the alternate of power supply for detection
Voltage and phase angle, and the type of power supply is judged to be currently accessed according to the voltage between phases and phase angle being currently accessed power supply, wherein,
The type being currently accessed power supply can include single phase poaer supply and three phase mains, and wherein, three phase mains can also include phase three-wire three
Power supply processed and three-phase four-wire system power supply.I.e. it is obtained in that according to the voltage between phases being currently accessed power supply detected and phase angle and works as
The rated voltage of front access power supply, and determine that it is the power supply in which area, and judge to be currently accessed the standard of power supply, i.e. determine
It is single phase poaer supply or three phase mains, can be normal with the auxiliary equipment ensureing electric heater etc. be currently accessed power supply and be connected
Work.
Such as, if being currently accessed the voltage between phases of power supply and phase angle is 0, then explanation is currently accessed power supply is single-phase electricity
Source, may thereby determine that the type of this current access unit.If the voltage between phases and the phase angle that are currently accessed power supply are not the most 0
Time, then explanation is currently accessed power supply is three phase mains, may thereby determine that the type of this current access unit.Further, power supply
Self-checking circuit 100 can also be currently accessed each phase voltage of power supply by detection and know that this is currently accessed the specified electricity of power supply
Pressure, to determine that this is currently accessed the power supply which area power supply is.
In one embodiment, this supply self adaptation adjusting apparatus 10 also includes the type being currently accessed power supply for storage
The memory module (not shown) of information, memory module can be to set depositor or control circuit 200 in power self test circuit 100
Inside setting depositor etc., certainly, memory module can also is that and is connected between power self test circuit 100 and control circuit 200
Peripheral hardware depositor, such that it is able to avoid loss of data.Specifically, power self test circuit 100 is connected to control by memory module
Circuit 200.
Control circuit 200 switches to for the connected mode controlling described power supply switch circuit and is currently accessed power supply with described
Default connected mode corresponding to type and control power supply switch circuit 300 and be connected to be currently accessed power supply.In the present embodiment, single
In sheet machine, storage has the multiple default connected mode of power supply switch circuit 300, multiple default connected mode and the class accessing power supply
Type one_to_one corresponding is arranged, and default connected mode can include that single-phase single loop three circulates connected mode and three-phase Y type connection side
Formula, specifically, three-phase Y type connected mode can also is that three-phase three-wire system connected mode or three-phase four-wire system connected mode.Specifically
, single-chip microcomputer reads the type being currently accessed power supply from memory module, and according to being currently accessed the type Switching power of power supply
The connected mode of switching circuit 300, so that the auxiliary equipments such as electric heater can match with the standard being currently accessed power supply,
And be connected to be currently accessed power supply by power supply switch circuit 300, it is ensured that the normal work of the auxiliary equipments such as electric heater.
In one embodiment, as shown in Figures 2 and 3, power supply switch circuit 300 includes the first relay, the second relay
Device, the 3rd relay, the 4th relay, the first load R1, the second load R2, the 3rd load R3 and current detection circuit；Its
In, the coil of the coil of the first relay, the coil of the second relay, the coil of the 3rd relay and the 4th relay all connects
It is connected to control circuit 200；The described first load R1 of contact KA1 series connection of the first relay forms the first branch road, the second relay
Contact KA2 series connection the second load R2 form the second branch road, the contact KA3 of the 3rd relay series connection the 3rd load R3 forms the 3rd
Branch road；The contact KA4 of the 4th relay forms the 4th branch road.
First end of the first branch road, the first end of the second branch road, the first end of the 3rd branch road and described 4th branch road
First end is respectively connecting to be currently accessed power supply；Specifically, the first end of the first branch road, the first end of the second branch road, the 3rd
First end on road is connected to be currently accessed the live wire of power supply, and the first end of the 4th branch road is connected to be currently accessed the zero line of power supply.
Second end of the second end of the first branch road, the second end of the second branch road and the 3rd branch road links together, and forms common port；4th
Second end of branch road is connected to common port.Wherein, the first relay, the second relay, the 3rd relay and the 4th relay divide
Yong Yu not control being turned on or off of respective branch, by arranging relay on each branch road, can realize each respectively
The independent control of branch road.
In the present embodiment, current detection circuit includes the first current measuring element FA1 being arranged in series on the first leg,
The the second current measuring element FA2 being arranged in series on the second branch road, and it is arranged in series in the 3rd electric current on the 3rd branch road
Detecting element FA3.First current measuring element FA1, the second current measuring element FA2 and the 3rd current measuring element FA3 all connect
Being connected to control circuit 200, the first current measuring element FA1 is for the operating current of detection the first branch road in real time, the second electric current inspection
Surveying the element FA2 operating current for detection the second branch road in real time, the 3rd current measuring element FA3 is for detection the 3rd in real time
The operating current on road, thus realize the detection protection of each branch road, it is ensured that it is currently accessed the reliability of power work.Wherein,
One current measuring element FA1, the second current measuring element FA2 and the 3rd current measuring element FA3 can be that choke coil, electric current are mutual
Sensor or sampling resistor etc..
In one embodiment, in single-chip microcomputer, the default connected mode of the power supply switch circuit 300 of storage includes three-phase Y type
Three-wire system connected mode, three-phase Y type four-wire system connected mode and single-phase single loop three circulate connected mode.Thus control circuit
200 can be according to the connected mode of the type Switching power switching circuit 300 being currently accessed power supply, so that power supply switching is electric
The connected mode on road 300 and the standard being currently accessed power supply match.
As in figure 2 it is shown, when the described type being currently accessed power supply be three phase mains and for three-phase three-wire system power supply time, control
Circuit 200 according to default connected mode corresponding to three-phase three-wire system power supply, control the first end of the first branch road, the of the second branch road
First end of one end and the 3rd branch road is respectively connecting to be currently accessed the first phase L1 of power supply, the second phase L2 and third phase L3, the
Second end of the second end of one branch road, the second end of the second branch road and the 3rd branch road links together, and forms common port；Meanwhile,
Control circuit 200 controls the first relay, the second relay and the 3rd relay and powers on so that the contact of the first relay
KA1, the contact KA2 of the second relay and the contact KA3 adhesive of the 3rd relay, and control the 4th relay power-off, make the 4th
The contact KA4 of relay is off.I.e. first branch road, the second branch road and the 3rd branch road form three-phase Y type three-wire system even
Connect mode.
In another embodiment, it is three phase mains and for three-phase four-wire system power supply when the described type being currently accessed power supply
Time, control circuit 200, according to the default connected mode of three-phase four-wire system power supply, controls the first end of the first branch road, the second branch road
The first end and the first end of the 3rd branch road be respectively connecting to be currently accessed the first phase L1 of power supply, the second phase L2 and third phase
L3；First end of the 4th branch road is connected to be currently accessed the zero line N of power supply；Simultaneously control circuit 200 control the first relay,
Two relays, the 3rd relay and the 4th relay are both powered up so that the contact KA1 of the first relay, the second relay touch
Point KA2, the contact KA3 of the 3rd relay and the equal adhesive of contact KA4 of the 4th relay.Now, the first branch road, the second branch road,
3rd branch road and the 4th branch road are both turned on, and the first branch road, the second branch road, the 3rd branch road and the 4th branch road form three-phase Y type four line
Connected mode processed.By introducing center line (the i.e. the 4th branch road), so that the first branch road, the second branch road and the work of the 3rd branch road
Current balance type, thus it is further ensured that reliability and the safety of the auxiliary equipments such as electric heater.
In one embodiment, as it is shown on figure 3, when the described type being currently accessed power supply is single phase poaer supply, control electricity
Road 200, according to the default connected mode of single phase poaer supply, controls the first end of the first branch road, the first end of the second branch road and the 3rd
First end on road is connected to be currently accessed the live wire L of power supply, and the first end of the 4th branch road is connected to be currently accessed the zero of power supply
Line N；Control circuit 200 controls the first relay, the second relay, the 3rd relay and the 4th relay and is both powered up simultaneously, from
And make the contact KA1 of the first relay, the contact KA2 of the second relay, the contact KA3 of the 3rd relay and the 4th relay
The equal adhesive of contact KA4.Now, the first branch road, the second branch road, the 3rd branch road and the 4th branch road form the circulation of single-phase single loop three
Connected mode is symmetrical to ensure three three phase powers loaded.
Further, the first relay, the second relay and the 3rd relay are the time relay；Control circuit 200
For determine according to the output valve of random function preset the delay time of the first relay, the delay time of the second relay and
The delay time of the 3rd relay, wherein, the delay time of the first relay, the delay time of the second relay and the 3rd relay
The delay time of device is different, and such as, the delay time of the first relay can be that (the i.e. first relay can not set in 0 second
Put delay time), the delay time of the second relay could be arranged to 10 seconds, and the 3rd relay could be arranged to 20 seconds.Afterwards,
Control circuit 200 according to the delay time of each relay above-mentioned according to its delay time sequencing contro the first relay,
Two relays and the 3rd relay power on respectively, it is achieved the off-peak electrification of three branch roads, during to reduce three branch road moments startups,
The impact that electrical network is caused.
In another embodiment, in single-chip microcomputer, the default connected mode of the power supply switch circuit 300 of storage only includes three
Phase Y type connected mode and single-phase single loop three circulate connected mode.In actual application, control circuit 200 can basis
The operating current of the operating current of the first branch road, the operating current of the second branch road and the 3rd branch road automatically controls the 4th branch road and leads
Lead to or close.
As in figure 2 it is shown, when the described type being currently accessed power supply is three phase mains, the first end of the first branch road, second
First end of branch road and the first end of the 3rd branch road are respectively connecting to be currently accessed the first phase L1 of power supply, the second phase L2 and the 3rd
Phase L3, the first end of the 4th branch road is connected to be currently accessed the zero line N of power supply.Control circuit 200 first control the first relay,
Second relay and the 3rd relay power on so that the contact KA1 of the first relay, the contact KA2 and the 3rd of the second relay
The contact KA3 adhesive of relay so that the first branch road, the second branch road and the 3rd branch road be currently accessed power supply and connect, now,
First branch road, the second branch road and the 3rd branch road form three-phase Y type three-wire system connected mode.
Secondly, the first current measuring element FA1 detects the operating current of the first branch road, the second current measuring element in real time
FA2 detects the operating current of the second branch road in real time, and the 3rd current measuring element FA3 detects the operating current of the 3rd branch road in real time.
The operating current of the operating current of the first branch road, the operating current of the second branch road and the 3rd branch road is arranged by control circuit 200
Sequence obtains max line electric current and minimum line electric current, and calculates acquisition line current extreme difference and average line electric current.Wherein, average line electric current
Can be geometrical mean or the arithmetic mean of instantaneous value of the operating current of three branch roads, line current extreme difference=max line electric current-minimum
Line current.Afterwards, according to line current extreme difference and the current deviation rate of average line Current calculation power supply switch circuit 300.This enforcement
In example, the current deviation rate of power supply switch circuit 300=(max line electric current-minimum line electric current)/average line electric current × 100%.
Again, control circuit 200 judges three according to the current deviation rate of power supply switch circuit 300 with predetermined deviation rate
Whether the operating current on road balances, and when the current deviation rate of power supply switch circuit 300 is more than or equal to predetermined deviation rate, illustrates three
Operating current between individual branch road is uneven, now controls the 4th relay and powers on, makes the contact KA4 adhesive of the 4th relay,
4th branch road connects with the zero line N being currently accessed power supply, i.e. opens center line, so that this power supply switch circuit 300 forms three
The connected mode of phase four-wire system.When the current deviation rate of power supply switch circuit 300 is less than predetermined deviation rate, three branch roads are described
Between operating current balance, now, continue through current detection circuit and detect the operating current of each branch road.The present embodiment
In, predetermined deviation rate can be 10%.
Further, when the current deviation rate of power supply switch circuit 300 is more than predetermined deviation rate, and wherein one or two
When the operating current of branch road electricity is close to 0, illustrates that this three phase mains is likely to occur the situation of phase shortage, now control the first relay
Device, the second relay, the 3rd relay and the 4th equal power-off of relay, thus the contact KA1 of the first relay, the second relay
The contact KA4 of contact KA2, the contact KA3 of the 3rd relay and the 4th relay be in off-state, thus disconnect electricity
Source switching circuit 300 and the connection being currently accessed power supply, to avoid burning the auxiliary equipments such as electric heater, it is ensured that auxiliary equipment
Reliability.
Additionally, as shown in Figure 4, present invention also offers a kind of supply self adaptation method of adjustment, comprise the steps:
S100, detection are currently accessed voltage between phases and the phase angle of power supply；In the present embodiment, by being currently accessed power supply
Detect, it is possible to obtain this is currently accessed the phase sequence information (comprising voltage between phases) of power supply, phase information (comprising phase angle)
And rated voltage information etc..
S200, according to being currently accessed the voltage between phases of power supply and phase angle judges to be currently accessed the type of power supply；Wherein, when
The type of front access power supply can include single phase poaer supply and three phase mains；Further, the type being currently accessed power supply can be wrapped
Include single phase poaer supply, three-phase three-wire system power supply and three-phase four-wire system power supply.
S300, the connected mode controlling described power supply switch circuit 300 switch to and the described type being currently accessed power supply
Corresponding default connected mode, and control power supply switch circuit 300 and be connected to be currently accessed power supply.Wherein, power supply switch circuit
The default connected mode of 300 can be stored in the control circuits such as single-chip microcomputer 200, the default connection side of power supply switch circuit 300
Formula can be multiple, and its type one_to_one corresponding with power supply is arranged.In the present embodiment, the default company of power supply switch circuit 300
The mode of connecing can be three-phase Y shape connected mode (including three-phase three-wire system and three-phase four-wire system) and unidirectional single loop three circulation even
Connect mode.So can automatically adjust the connected mode in loop according to the type being currently accessed power supply, it is not necessary to adjust wiring or more
Change the model of auxiliary equipment, so that the auxiliary equipments such as electric heater can be applicable to various types of power supply, improve general
Property.
Wherein in an embodiment, as it is shown in figure 5, when the described type being currently accessed power supply is three phase mains, on
Method of stating also includes:
S310, the first end controlling the first end of the first branch road, the first end of the second branch road and the 3rd branch road connect respectively
Being currently accessed the first phase L1 of power supply, the second phase L2 and third phase L3 described in Zhi, the first end of described 4th branch road is connected to institute
State the zero line N being currently accessed power supply；Power on by controlling the first relay, the second relay and the 3rd relay, control first
The contact KA1 of relay, the contact KA2 of the second relay and the contact KA3 adhesive of the 3rd relay；So that first
Road, the second branch road and the 3rd branch road form the connected mode of three-phase three-wire system.
S320, obtain respectively the operating current of the first branch road, the operating current of the second branch road and the 3rd branch road work electricity
Stream；Wherein, each branch road is arranged in series the current measuring element for detecting its operating current, the electric current on each branch road
Detecting element can be choke coil or current transformer etc..
S330, operating current, the operating current of the second branch road and the operating current meter of the 3rd branch road according to the first branch road
Calculate the current deviation rate of power supply switch circuit 300；Specifically include following steps:
The operating current of operating current, the operating current of the second branch road and the 3rd branch road according to the first branch road calculates respectively
Max line electric current, minimum line electric current and average line electric current；Wherein average line electric current can be geometrical mean or arithmetic average
Value.
According to max line electric current and minimum line Current calculation line current extreme difference；In the present embodiment, line current extreme difference=maximum
Line current-minimum line electric current.
According to line current extreme difference and the current deviation rate of average line Current calculation power supply switch circuit 300, wherein, power supply is cut
Change current deviation rate=line current extreme difference/average line electric current × 100% of circuit 300.
S340, judge the current deviation rate of power supply switch circuit 300 whether more than or equal to predetermined deviation rate, wherein, in advance
If deviation ratio can be 10%；The most then perform step S350, power on by controlling the 4th relay, control the 4th relay
Contact KA4 adhesive.Further, when judging open phases of three-phase power source, control the first relay, the second relay, the 3rd continue
Electrical equipment and the 4th equal power-off of relay, thus the contact KA2 of the contact KA1 of the first relay, the second relay, the 3rd relay
Contact KA3 and the contact KA4 of the 4th relay be in off-state, thus deenergization switching circuit 300 is with current
Access the connection of power supply, to avoid burning the auxiliary equipments such as electric heater, it is ensured that the reliability of auxiliary equipment.If it is not, then return
Step S320, continues to obtain the operating current of each branch road.
In another embodiment, when the described type being currently accessed power supply is three phase mains, said method includes:
The first end controlling the first end of the first branch road, the first end of the second branch road and the 3rd branch road is respectively connecting to currently
Access the first phase L1 of power supply, the second phase L2 and third phase L3, and control the contact KA1 of the first relay, the second relay
The contact KA3 adhesive of contact KA2 and the 3rd relay, and the contact KA4 of the 4th relay is off；
Or, the first end controlling the first end of the first branch road, the first end of the second branch road and the 3rd branch road connects respectively
To being currently accessed the first phase L1 of power supply, the second phase L2 and third phase L3, the first end of the 4th branch road is connected to be currently accessed electricity
The zero line N in source；And control the contact KA1 of the first relay, the contact KA2 of the second relay, the contact KA3 of the 3rd relay and
The equal adhesive of contact KA4 of the 4th relay.
In another embodiment, as shown in Figure 6, when the described type being currently accessed power supply is single phase poaer supply, described
Method also includes:
S360, the first end controlling the first end of the first branch road, the first end of the second branch road and the 3rd branch road are connected to
The described live wire L being currently accessed power supply, the first end of the 4th branch road be connected to described in be currently accessed the zero line N of power supply；And pass through
Control the 4th relay to power on, control the contact KA4 adhesive of the 4th relay；
The output valve of the random function that S370, basis are preset determines the delay time of the first relay, the second relay respectively
The delay time of device and the delay time of the 3rd relay；Wherein, the delay time of the first relay, the prolonging of the second relay
Time the time and the delay time of the 3rd relay different；
S380, respectively according to the delay time of described first relay, the delay time of described second relay and described
The delay time of the 3rd relay, controls described first relay, described second relay and the described 3rd continues the most successively
Electrical equipment powers on respectively, now, and the contact KA1 of the first relay, the contact KA2 of the second relay and the contact of the 3rd relay
KA3 is according to sequential successively adhesive, and the i.e. first branch road, the second branch road and the 3rd branch road sequentially turn on according to sequential, to avoid three
When branch road simultaneously turns on, electrical network is impacted.Further, the first branch road, the second branch road and the 3rd branch road formation single loop three circulate
Connected mode, now the first branch road, the second branch road and the 3rd branch circuit parallel connection are arranged, to ensure the power-balance in loop.
The execution step of the supply self adaptation method of adjustment of the present invention and above-mentioned power supply are from using the worked of adjusting apparatus
Journey is similar, specifically can be found in described above.
The supply self adaptation adjusting apparatus of the present invention and method, be currently accessed electricity by power self test electric circuit inspection judgement
The type in source, control circuit controls the connected mode of described power supply switch circuit and switches to and the described type being currently accessed power supply
Corresponding default connected mode, so that the auxiliary equipments such as electric heating device can be applicable to different power supplys, it is not necessary to carry out
Adjust the work such as wiring or lectotype selection, improve the versatility of auxiliary equipment, it is ensured that auxiliary equipment can normally work.And
And, when power supply occurs abnormal, it is possible to automatic cutting equipment and the connection accessing power supply, thus ensure that the reliability of equipment.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but also
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that, for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these broadly fall into the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (14)
1. a supply self adaptation adjusting apparatus, it is characterised in that including:
Power supply switch circuit (300)；
Power self test circuit (100), is currently accessed voltage between phases and the phase angle of power supply for detection, and according to described alternate electricity
The type of power supply it is currently accessed described in pressure and the judgement of described phase angle；Wherein, the type being currently accessed power supply described in includes single-phase
Power supply and three phase mains；
Control circuit (200), described power self test circuit (100) and described power supply switch circuit (300) are connected to described control
Circuit processed (200), described control circuit (200) switches to for the connected mode controlling described power supply switch circuit to be worked as with described
The default connected mode that the type of front access power supply is corresponding, and control described power supply switch circuit be connected to described in be currently accessed electricity
Source.
Supply self adaptation adjusting apparatus the most according to claim 1, it is characterised in that described power supply switch circuit includes
One relay, the second relay, the 3rd relay, the 4th relay, the first load R1, the second load R2 and the 3rd load
R3；
The coil of described first relay, the coil of described second relay, the coil of described 3rd relay and described
The coil of four relays is connected to described control circuit；The described first load R1 of contact KA1 series connection of described first relay
Forming the first branch road, the described second load R2 of contact KA2 series connection of described second relay forms the second branch road, and the described 3rd continues
The described 3rd load R3 of contact KA3 series connection of electrical equipment forms the 3rd branch road；The contact KA4 of described 4th relay forms the 4th
Road；
First end of described first branch road, the first end of described second branch road, the first end of described 3rd branch road and described
First end of four branch roads is currently accessed power supply described in being respectively connecting to；Second end of described first branch road, described second branch road
Second end of the second end and described 3rd branch road links together, and forms common port, and the second end of described 4th branch road is connected to
Described common port.
Supply self adaptation adjusting apparatus the most according to claim 2, it is characterised in that when the described class being currently accessed power supply
When type is three-phase three-wire system power supply, described control circuit control the first end of described first branch road, the first of described second branch road
First end of end and described 3rd branch road is currently accessed the first phase of power supply, the second phase and third phase described in being respectively connecting to, and
Control the contact KA1 of described first relay, the contact KA2 of described second relay and the contact KA3 of described 3rd relay
Adhesive, the contact KA4 of described 4th relay is off.
Supply self adaptation adjusting apparatus the most according to claim 2, it is characterised in that when the described class being currently accessed power supply
When type is three-phase four-wire system power supply, described control circuit control the first end of described first branch road, the first of described second branch road
First end of end and described 3rd branch road is currently accessed the first phase of power supply, the second phase and third phase described in being respectively connecting to；Institute
State the first end of the 4th branch road be connected to described in be currently accessed the zero line of power supply, and control described first relay contact KA1,
The contact KA4 of the contact KA2 of described second relay, the contact KA3 of described 3rd relay and described 4th relay all inhales
Close.
Supply self adaptation adjusting apparatus the most according to claim 2, it is characterised in that when the described class being currently accessed power supply
When type is single phase poaer supply, described control circuit controls the first end of described first branch road, the first end of described second branch road and institute
State the first end of the 3rd branch road be connected to described in be currently accessed the live wire of power supply, the first end of described 4th branch road is connected to institute
State the zero line being currently accessed power supply, and control the contact KA1 of described first relay, the contact KA2 of described second relay, institute
State contact KA3 and the equal adhesive of contact KA4 of described 4th relay of the 3rd relay.
Supply self adaptation adjusting apparatus the most according to claim 5, it is characterised in that described first relay, described
Two relays and described 3rd relay are the time relay；
Described control circuit is for determining the delay time of described first relay, institute according to the output valve of the random function preset
State delay time and the delay time of described 3rd relay of the second relay, and control described first relay chronologically
Contact KA1, the contact KA2 of described second relay and the contact KA3 adhesive successively of described 3rd relay.
Supply self adaptation adjusting apparatus the most according to claim 2, it is characterised in that described power supply switch circuit also includes
Current detection circuit, the first current measuring element FA1 that described current detection circuit includes being connected with described control circuit, second
Current measuring element FA2 and the 3rd current measuring element FA3；
Described first current measuring element FA1 is arranged in series on described first branch road, for detecting the work of described first branch road
Make electric current；Described second current measuring element FA2 is arranged in series on the second branch road, for detecting the work of described second branch road
Electric current；Described 3rd current measuring element FA3 is arranged in series on the 3rd branch road, for detecting the work electricity of described 3rd branch road
Stream.
Supply self adaptation adjusting apparatus the most according to claim 7, it is characterised in that when the described class being currently accessed power supply
When type is three phase mains, described control circuit controls the first end of described first branch road, the first end of described second branch road and institute
State the first end of the 3rd branch road be respectively connecting to described in be currently accessed the first phase of power supply, the second phase and third phase, the described 4th
First end of branch road is currently accessed the zero line of power supply described in being connected to；
The most described control circuit controls the contact KA1 of described first relay, the contact KA2 of described second relay and described
The contact KA3 adhesive of the 3rd relay, and when the current deviation rate of described power supply switch circuit is more than or equal to predetermined deviation rate,
Control the contact KA4 adhesive of described 4th relay or disconnect described power supply switch circuit and the described company being currently accessed power supply
Connect.
9. a supply self adaptation method of adjustment, it is characterised in that comprise the steps:
Detection is currently accessed voltage between phases and the phase angle of power supply；
The type of power supply it is currently accessed according to described voltage between phases and the judgement of described phase angle；
Control the connected mode of described power supply switch circuit and switch to the default company corresponding with the described type being currently accessed power supply
Connect mode, and control described power supply switch circuit be connected to described in be currently accessed power supply.
Supply self adaptation method of adjustment the most according to claim 9, it is characterised in that when the described power supply that is currently accessed
When type is three phase mains, described method also includes:
Control the first end of the first end of the first branch road, the first end of the second branch road and the 3rd branch road be respectively connecting to described currently
Access the first phase of power supply, the second phase and third phase, the first end of described 4th branch road be connected to described in be currently accessed power supply
Zero line；
Control the contact KA1 of the first relay, the contact KA2 of the second relay and the contact KA3 adhesive of the 3rd relay；
Obtain the operating current of the first branch road, the operating current of the second branch road and the operating current of the 3rd branch road respectively；
Operating current, the operating current of described second branch road and the operating current of described 3rd branch road according to described first branch road
Calculate the current deviation rate of power supply switch circuit；
Judge that the current deviation rate of described power supply switch circuit whether more than or equal to predetermined deviation rate, the most then controls described
The contact KA4 adhesive of the 4th relay or disconnect described power supply switch circuit and the described connection being currently accessed power supply；If it is not, then
Continue to obtain the operating current of each branch road.
11. supply self adaptation methods of adjustment according to claim 10, it is characterised in that described method also includes:
Operating current, the operating current of described second branch road and the operating current of described 3rd branch road according to described first branch road
Calculate max line electric current, minimum line electric current and average line electric current respectively；
According to described max line electric current and described minimum line Current calculation line current extreme difference；
Current deviation rate according to power supply switch circuit described in described line current extreme difference and described average line Current calculation.
12. supply self adaptation methods of adjustment according to claim 9, it is characterised in that when the described power supply that is currently accessed
When type is three phase mains, described method includes:
The first end controlling the first end of described first branch road, the first end of described second branch road and described 3rd branch road connects respectively
It is currently accessed the first phase of power supply, the second phase and third phase described in being connected to, and controls the contact KA1 of the first relay, second continue
The contact KA2 of electrical equipment and the contact KA3 adhesive of the 3rd relay, and the contact KA4 of the 4th relay is off；
Or, control the first end of described first branch road, the first end of described second branch road and the first end of described 3rd branch road
Being currently accessed the first phase of power supply, the second phase and third phase described in being respectively connecting to, the first end of described 4th branch road is connected to
The described zero line being currently accessed power supply, and control the contact KA1 of described first relay, the contact KA2 of described second relay,
The contact KA3 of described 3rd relay and the equal adhesive of contact KA4 of described 4th relay.
13. supply self adaptation methods of adjustment according to claim 9, it is characterised in that when the described power supply that is currently accessed
When type is single phase poaer supply, described method also includes:
Control the first end of the first end of the first branch road, the first end of the second branch road and the 3rd branch road to be connected to described currently connect
Enter the live wire of power supply, the first end of the 4th branch road be connected to described in be currently accessed the zero line of power supply；
Control the contact KA1 of described first relay, the contact KA2 of described second relay, the contact of described 3rd relay
KA3 and the equal adhesive of contact KA4 of described 4th relay.
14. supply self adaptation methods of adjustment according to claim 13, it is characterised in that described method also includes:
When output valve according to default random function determines the time delay of the delay time of the first relay, the second relay respectively
Between and the delay time of the 3rd relay；Wherein, the delay time of the first relay, the delay time of the second relay and
The delay time of three relays is different；
Respectively according to delay time, the delay time of described second relay and described 3rd relay of described first relay
Delay time, control the contact of described first relay, the contact of described second relay and described 3rd relay chronologically
The contact KA3 adhesive successively of device.
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| CN106253267B (en) | 2018-12-04 |
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