CN106059444A - Synchronous feeding energy-saving circuit - Google Patents
Synchronous feeding energy-saving circuit Download PDFInfo
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- CN106059444A CN106059444A CN201610621626.3A CN201610621626A CN106059444A CN 106059444 A CN106059444 A CN 106059444A CN 201610621626 A CN201610621626 A CN 201610621626A CN 106059444 A CN106059444 A CN 106059444A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/047—V/F converter, wherein the voltage is controlled proportionally with the frequency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention provides a synchronous feeding energy-saving circuit which comprises a frequency converter, a working motor, an energy-saving controller and an external switch terminal XT. The energy-saving controller is connected to the external switch terminal XT and the frequency converter. A load switching value A is set, power is supplied to a system power supply bus, a circuit is connected, and the soft switch-on of the frequency converter is carried out, and the frequency converter outputs current to drive the working motor. The energy-saving controller detects a real-time load state. A load detection system detects the load signal value B outputted by the controller. The load switching value A and a load signal value B are compared. If the load switching value A is larger than the load signal value B, the frequency converter driving is maintained. If the load switching value A is smaller than the load signal value B, the external switch terminal XT is started, and a three-phase power supply supplies power to the working motor directly through synchronous feed. According to the synchronous feeding energy-saving circuit, the energy-saving efficiency is improved while the energy-saving cost is reduced, the operation characteristic of industrial equipment is supported, and the synchronous feeding energy-saving circuit has good adaptability.
Description
Technical field
The present invention relates to a kind of synchronization and feed energy-saving circuit.
Background technology
Along with the development of the most progressive of society with science and technology, people become more concerned with the ground that we depend on for existence
Ball, most countries has also been fully recognized that the environment importance to our human development in the world.Each state is all taking actively
Effective measures improve environment, reduce and pollute.The most mostly important be also the most urgent problem be exactly energy problem, be from
Fundamentally solve energy problem, except finding the new energy, energy-conservation be crucial be also the most effective important measures,
By effort, people achieve huge achievement in the research and product development of power-saving technology.
Energy-conservation referring to that reinforcement can manage, use technically feasible, reasonable in economy and environment and society can bear
Measure, reduce the loss from production of energy to consumption links and waste, more efficient, utilize the energy reasonablely.Its
In, technically feasible referring to can realize on the basis of prior art；Reasonable in economy has sought to suitable an input and has produced
Go out ratio；Environment can accept to refer to energy-conservation also to reduce the pollution to environment, and its index wants meet the requirement of environmental protection；Society can connect
Referred to not affect normal production and growth in the living standard；Effectively seek to reduce loss and the waste of the energy.
On industrial energy saving, mainly there are energy-saving and frequency-variable, compensation energy-saving and soft open the several ways such as energy-conservation.
Energy-saving and frequency-variable has certain advantage, and converter can adjust the means of electric current with soft start motor by frequency modulation and voltage modulation,
Electric current can be reduced while maintaining rotating speed when empty underloading, play energy-conservation effect, totally be used in and start frequently on motor,
Energy-saving effect is obvious.Converter mainly includes the input and output of control circuit, computing circuit, testing circuit, control signal
Circuit and drive circuit.A kind of main control mode is opened loop control, is directly proportional to frequency by U/f control that is voltage
Control mode, changes the voltage of motor power while changing motor power frequency, makes motor magnetic flux keep certain, wider
Speed adjustable range in, frequency and the power factor (PF) of motor do not decline.
Converter is energy-conservation to be mainly manifested in the application such as blower fan, water pump, and gradually expands to most industrial equipment very
To household electrical appliance.In order to ensure the reliability produced, various manufacturing machines, when designing adapted power drive, all leave certain
Surplus capacity.When motor can not run under full capacity, in addition to reaching power drive request, unnecessary moment adds wattful power
The consumption of rate, causes the waste of electric energy.The traditional speed regulating method of the equipment such as blower fan, pump class is by regulation entrance or the gear of outlet
Plate, valve opening regulate to air quantity and confluent, and its input power is big, and substantial amounts of energy resource consumption is baffle plate, the cutting of valve
During stream.When using frequency control, if traffic requirement reduces, can be met by the rotating speed of reduction pump or fan and want
Ask.Cube being directly proportional of general blower fan water pump class load consumption energy and rotating speed, specifically can pass through VarSuv energy saving calculator
Draw.The energy-conservation ratio of universal experience numerical value can reach about 30 50%.
In commercial Application, reactive power not only increases the heating of line loss and equipment, the more importantly fall of power factor
The low reduction causing network re-active power, substantial amounts of reactive energy consumption is in the middle of circuit, and equipment service efficiency is low, and waste is tight
Weight, after using RHVC, due to the effect of the internal filter capacitor of converter, thus decreases reactive loss, adds
The active power of electrical network.
Electrical network is caused serious impact by motor hard reboot, but also can require too high to net capacity, produces during startup
Big electric current and very big to the infringement of baffle plate and valve during vibrations, totally unfavorable to the service life of equipment, pipeline.And use change
Frequently after energy saver, utilizing the soft start function of converter that starting current will be made to start from scratch, maximum is also less than specified electricity
Stream, alleviates the impact to electrical network and the requirement to power supply capacity, extends the service life of equipment and valve.Save equipment
Maintenance cost.Theoretically, converter can be used in all plant equipment with motor, and motor is starting
Time, electric current can be higher 56 times than specified, not only can affect the service life of motor but also consume more electricity. and system is setting
Timing can leave certain surplus on choice of electrical machine, and the speed of motor is to immobilize, but in actual use, sometimes
To run with relatively low or higher speed, therefore to carry out Frequency Conversion Modification and be necessary.It is soft that converter can realize motor
Start, compensate power factor (PF), reach the purpose of energy-saving speed regulating by changing equipment input voltage frequency, and can provide to equipment
Cross the defencive functions such as stream, overvoltage, overload.
But, current existing power-saving technology and equipment, or there is the space improved further, its system or equipment
, all there is different journey in complexity, energy-saving efficiency, energy-conservation cost and to the operating characteristics support of industrial equipment and adaptability
The deficiency of degree, requires further improvement and promotes.
Summary of the invention
In view of situation above, in order to solve the problem that above-mentioned technology exists, the present invention proposes a kind of synchronization and feeds electricity-saving
Road, described circuit includes converter and work drive motor, also includes energy-saving controller and outside switched terminal XT, described Energy Saving Control
Device is connected with outside switched terminal XT and converter respectively；First connection end of described outside switched terminal XT is arranged on converter
With between system power supply bus, the second connection end of described outside switched terminal XT is arranged on switching switch KM1 and work drive motor
Between.Setting load switching value A, to system power supply bussed supply, connect circuit, converter is carried out soft start, converter is defeated
Go out electric current and drive work drive motor；Energy-saving controller detection real time load state, bearing of load-detecting system detection controller output
Carry signal value B；Relatively load switching value A and load signal value B；If load switching value A is more than load signal value B, keep frequency conversion
Device drives；If load signal value B is more than load switching value A, start outside switched terminal XT, by synchronizing feed directly by three-phase
Power supply is powered to work drive motor.
Preferably, described load-detecting system is arranged in energy-saving controller, and as the comprising modules of energy-saving controller
Connected by the connection end of energy-saving controller and load switched system.
Further, when described outside switched terminal XT starts, the electric current switching described converter is zero.
Further, described by synchronizing feed and directly being powered to work drive motor by three phase mains time current phase with
Current phase during transducer drive is identical.
The synchronization feed energy-saving circuit proposed according to the present invention, described motor rated power is more than the specified merit of described converter
Rate.
Alternatively, the synchronization feed energy-saving circuit proposed according to the present invention, described transducer control circuit includes computing electricity
Road and testing circuit, described computing circuit arranges two V/f algorithm models, and the first algorithm model includes variable V 1 and f1, and second
Algorithm model includes variable V 2 and f2.Described transducer control circuit is calculated by the first algorithm model or the second algorithm model
Motor excitation optimal during motor load change；If load switching value A is more than load signal value B, transducer control circuit is used
Second algorithm model calculates motor excitation optimal during motor load change, and is compensated for load, the required frequency of output
Inverter with voltage；If load signal value B is more than load switching value A, transducer control circuit is used the first algorithm model
Calculate motor excitation optimal during motor load change, and load is compensated for, the required frequency of output and the inversion of voltage
Power supply.
After the technology taking the present invention to propose, synchronization feed energy-saving circuit according to embodiments of the present invention, by arranging
Outside switched terminal XT, the electric current needed for work drive motor can be provided by converter, it is also possible to by synchronizing feed directly by three
Phase power supply provides, and the rated power of work drive motor, more than the rated power of converter, reduces in prior art converter
Apolegamy requirement, can use less converter to support bigger motor, is particularly suited for the equipment of intermittence work, gently
Can run with energy saver mode when carrying (unloaded), work drive motor capacity operation can be made when heavy duty (work), meet equipment
Power demand.Energy-saving efficiency is improve, it is possible to the running of supporting industry equipment is special well while reducing energy-conservation cost
Property, there is good adaptability.
Accompanying drawing explanation
Fig. 1 shows the schematic diagram of the embodiment of the present invention one energy-saving control circuit
Fig. 2 shows the control method step of the embodiment of the present invention one energy-saving control circuit
Fig. 3 shows the connection diagram of the embodiment of the present invention two energy-saving control method
Fig. 4 shows the control method step of the embodiment of the present invention two energy-saving control method
Fig. 5 shows the algorithm model schematic diagram of the embodiment of the present invention two energy-saving control method
Fig. 6 shows that the embodiment of the present invention three synchronizes the schematic diagram of feed energy-saving circuit
Fig. 7 shows that the embodiment of the present invention three synchronizes the control method step of feed energy-saving circuit
Fig. 8 shows the schematic diagram of the embodiment of the present invention four contactor energy-saving circuit
Fig. 9 shows the control method step of the embodiment of the present invention four contactor energy-saving circuit
Figure 10 shows the schematic diagram of the embodiment of the present invention five controllable silicon energy-saving circuit
Figure 11 shows the control method step of the embodiment of the present invention five controllable silicon energy-saving circuit
Detailed description of the invention
Below with reference to accompanying drawings each of the present invention is preferred embodiment described.There is provided referring to the drawings
Describe, to help the understanding of the example embodiment to the present invention limited by appended claims and their equivalents.It includes side
The various details that assistant solves, but they can only be counted as exemplary.Therefore, it would be recognized by those skilled in the art that
Embodiment described herein can be made various changes and modifications, without deviating from scope and spirit of the present invention.And, in order to
Make description more clear succinct, will omit the detailed description that it is well known that function and structure.
As it is shown in figure 1, as embodiments of the invention one, a kind of energy-saving control circuit, there is light running loop 1 and weight
Carrying operating loop 2, described light running loop 1 includes converter VVVF and energy-saving controller 11, described heavy service loop 2 with
Described light running loop 1 parallel join, and be jointly serially connected with between system power supply bus L1/L2/L3 and work drive motor M, institute
State energy-saving controller 11 to be connected with converter VVVF, at described light running loop 1 and heavy service loop 2 and circuit busbar
Arranging load switched system 3 between L1/L2/L3, described energy-saving controller 11 is connected with load switched system 3.At system power supply
It is provided with air switch QS and main switch KM, at converter VVVF and work electricity between bus L1/L2/L3 and load switched system 3
Control switch KM1 it is provided with between machine M.
In the energy-saving control circuit of according to embodiments of the present invention, also include load-detecting system 4, described load detecting
System 4 is connected with energy-saving controller 11 and load switched system 3 respectively.
It is of particular importance that the rated power that the rated power of described work drive motor M is more than described converter VVVF, reduce
Apolegamy requirement to converter, can use less converter to support bigger motor, meet equipment operation demand
Meanwhile, equipment cost is saved.
As in figure 2 it is shown, according to embodiments of the present invention one energy-saving control circuit, step S1 in energy-saving controller 11 in advance
Setting load switching value A, system power supply bus L1/L2/L3 is powered by step S2 again, connects light running loop 1, then in step
Rapid S3 carries out soft start to converter VVVF, and in step S4, converter VVVF output electric current drives work drive motor M.Run at equipment
During, according to requirement and the real time load situation of equipment different working modes, load switched system 3 is according to energy-saving controller 11
Instruction switch between light running loop 1 and heavy service loop 2, returned by light running loop 1 or heavy service respectively
Road 2 drives work drive motor M.
According to embodiments of the present invention in the energy-saving control circuit of, described load switched system 3 is according to energy-saving controller
The method that the instruction of 11 switches between light running loop 1 and heavy service loop 2 includes: the most energy-conservation control
Device 11 processed detects real time load state, and step S6 load-detecting system 4 detects load signal value B of energy-saving controller 11 output,
Then load switching value A and load signal value B are compared in step S7, according to the comparative structure of step S7, if load signal value B is big
In load switching value A, the most in step s 8 starting load switched system 3, now system performs step S9, disconnects light running and returns
Road 1, and connect heavy service loop 2.
After the technology taking the present invention to propose, the energy-saving control circuit of according to embodiments of the present invention, have employed two kinds
Operating loop in the case of different loads, the rated power of work drive motor, more than the rated power of converter, reduces existing skill
Apolegamy requirement to converter in art, can use less converter to support bigger motor, be particularly suited for intermittence
The equipment of work, can run with energy saver mode when underloading (unloaded), can make the full merit of work drive motor when heavy duty (work)
Rate is run, and meets the power demand of equipment.Energy-saving efficiency is improve, it is possible to support work well while reducing energy-conservation cost
The operating characteristics of industry equipment, has good adaptability.
Fig. 3 show the connection diagram of a kind of energy-saving control method of the embodiment of the present invention two, as it can be seen, system supplies
Goddess of lightning line L1/L2/L3 is connected with converter VVVF through air switch QS and main switch KM, and converter VVVF is through switching switch
KM1 is connected with work drive motor M, arranges energy-saving controller 11 and load-detecting system 4, energy-saving controller 11 and load detecting simultaneously
System 4 is connected with each other and is connected with converter VVVF respectively.
As shown in Figure 4, as a kind of energy-saving control method of the embodiment of the present invention two, comprise the steps: step S1,
Energy-saving controller 11 sets load switching value A, switches with reality for carrying out system in the case of power termination set in advance
Existing energy-conservation；System power supply bus L1/L2/L3 is powered by step S2, and step S3 carries out soft start to converter VVVF, and step S4 becomes
Frequently device VVVF output electric current drives work drive motor M.In step s 5, energy-saving controller 11 detects real time load state, then enters
Row step S6, load-detecting system 4 detects load signal value B of energy-saving controller 11 output, energy-saving controller 11 in step S7
Relatively load switching value A and load signal value B, load-detecting system 4 according to comparative result to the control circuit of converter VVVF
Sending control signal, the control circuit of described converter VVVF calculates motor by the first algorithm model or the second algorithm model
Motor excitation optimal during load change；If load switching value A is more than load signal value B, in step S8 ' in, converter VVVF
Control circuit in optimal motor excitation when calculating motor load change with the second algorithm model, load is compensated for,
And perform step S9 ', the inverter of the required low voltage of output and frequency is to drive work drive motor M；If load signal value B is big
In load switching value A, then perform step S8, the control circuit of converter VVVF calculates motor load with the first algorithm model
Motor excitation optimal during change, and be compensated for load, then performs step S9, the required high voltage of output and frequency
Inverter is to drive work drive motor M.
The circuit of described Frequency Converter Control VVVF includes computing circuit and testing circuit, as it is shown in figure 5, described computing circuit
Being provided with two V/f algorithm models, the first algorithm model includes variable V 1 and f1, and the second algorithm model includes variable V 2 and f2.
The value of described variable V 1 is more than the value of variable V 2, the described work drive motor M rated power specified merit more than described converter VVVF
Rate.
As the energy-saving control method of the embodiment of the present invention two, the value of described variable V 1 is 380V, the value of described variable V 2
For 200V.
As the energy-saving control method of the embodiment of the present invention two, the value of described variable f1 and f2 is 50HZ.
After the technology taking the present invention to propose, the energy-saving control method of two according to embodiments of the present invention, for converter
Algorithm have employed the algorithm model in the case of two kinds of different loads, the rated power of work drive motor is more than the specified merit of converter
Rate, reduces the apolegamy requirement to converter in prior art, and less converter can be used to support bigger motor, especially
It is applicable to the equipment of intermittence work, can run with energy saver mode when underloading (unloaded), permissible when heavy duty (work)
Make work drive motor capacity operation, meet the power demand of equipment.Energy-saving efficiency, energy is improve while reducing energy-conservation cost
The operating characteristics of enough supporting industry equipment well, has good adaptability.
As shown in Figure 6, a kind of as the embodiment of the present invention three synchronizes feed energy-saving circuit, and described circuit includes converter
VVVF and work drive motor M, system power supply bus L1/L2/L3 are connected with converter VVVF through air switch QS and main switch KM,
Converter VVVF is connected with work drive motor M through switching switch KM1, arranges energy-saving controller 11 and outside switched terminal simultaneously
XT, described energy-saving controller 11 is connected with outside switched terminal XT and converter VVVF respectively.Described outside switched terminal XT
First connects end is arranged between converter VVVF and system power supply bus L1/L2/L3, the second of described outside switched terminal XT
Connect end to be arranged between switching switch KM1 and work drive motor M.
During as it is shown in fig. 7, this synchronization feed energy-saving circuit runs, step S1 is first carried out and sets in energy-saving controller 11
Load switching value A, system power supply bus L1/L2/L3 is powered by later step S2, connects circuit, and step S3 is to converter VVVF
Carrying out soft start, and perform step S4, converter VVVF output electric current drives work drive motor M；In running, perform step
S5, energy-saving controller 11 detects real time load state, and step S6, is arranged on the load-detecting system in energy-saving controller 11
Load signal value B of detection energy-saving controller 11 output；In the step s 7, energy-saving controller 11 compares load switching value A with negative
Carry signal value B；If step S8 ' find that load switching value A more than load signal value B, then performs step S9 ', keep converter
VVVF drives；If step S8 finds that load signal value B more than load switching value A, then starts outside switched terminal XT, performs step
S9, is directly powered to work drive motor M by three phase mains by synchronizing feed.
Further, when described outside switched terminal XT starts, the electric current switching described converter is zero.
Further, described by synchronizing current phase when feed is direct is powered to work drive motor M by three phase mains
Current phase when driving with converter VVVF is identical.
The synchronization feed energy-saving circuit proposed according to the present invention, described work drive motor M rated power is more than described converter
VVVF rated power.
After the technology taking the present invention to propose, the synchronization feed energy-saving circuit of three according to embodiments of the present invention, by setting
Electric current needed for putting outside switched terminal XT, work drive motor can be provided by converter, it is also possible to by synchronize feed directly by
Three phase mains provides, and the rated power of work drive motor, more than the rated power of converter, reduces in prior art converter
Apolegamy requirement, less converter can be used to support bigger motor, be particularly suited for intermittence work equipment,
Can run with energy saver mode during underloading (unloaded), work drive motor capacity operation can be made when heavy duty (work), meet and set
Standby power demand.Energy-saving efficiency is improve, it is possible to the running of supporting industry equipment well while reducing energy-conservation cost
Characteristic, has good adaptability.
Fig. 8 show a kind of contactor energy-saving circuit of the embodiment four according to present invention, and described circuit includes becoming
Frequently device VVVF and work drive motor M, system power supply bus L1/L2/L3 are through air switch QS and main switch KM and converter VVVF
Connecting, converter VVVF is connected with work drive motor M.Also include the catalyst being arranged between converter VVVF and work drive motor M
KM1, and the catalyst KM2 in parallel with converter VVVF, the first connection end of described KM2 is arranged on converter VVVF and system
Between power supply buses L1/L2/L3, the second connection end of described KM2 is arranged between catalyst KM1 and work drive motor M；Also include
Energy-saving controller 11, described energy-saving controller 11 is connected with converter VVVF, catalyst KM1 and KM2 respectively.
As it is shown in figure 9, according to embodiments of the present invention four contactor energy-saving circuit, be first carried out during operation step S1 joint
Can set load switching value A in controller 11, then system power supply bus L1/L2/L3 is powered by step S2, connects circuit, step
Rapid S3 carries out soft start to converter VVVF, and converter VVVF output electric current drives work drive motor M the most in step s 4；With
Time, energy-saving controller 11 detects real time load state in step s 5, and performs step S6, is arranged in energy-saving controller 11
Load signal value B of load-detecting system detection energy-saving controller 11 output；In the step s 7, energy-saving controller 11 compares load
Switching value A and load signal value B；If load switching value A is more than load signal value B, perform step S8 ', keep catalyst KM1 to close
Close, step S9 ' in by converter VVVF drive work drive motor M；If load signal value B is more than load switching value A, perform step
S8, catalyst KM1 disconnect, and catalyst KM2 closes, and in step S9, three phase mains and work drive motor M are directly connected to and drive work
Motor M.
Contactor energy-saving circuit according to the present invention, described work drive motor M rated power is more than described converter VVVF's
Rated power.
After the technology taking the present invention to propose, the contactor energy-saving circuit of four according to embodiments of the present invention, by arranging
Needed for catalyst KM1 between converter and work drive motor, and the catalyst KM2 in parallel with converter, work drive motor
Electric current can be provided by converter, it is also possible to is provided by the catalyst KM2 in parallel with converter, the rated power of work drive motor
More than the rated power of converter, reduce the apolegamy requirement to converter in prior art, less converter can be used
Support bigger motor, be particularly suited for the equipment of intermittence work, can run with energy saver mode when underloading (unloaded),
Work drive motor capacity operation can be made when heavy duty (work), meet the power demand of equipment.Reducing the same of energy-conservation cost
Time improve energy-saving efficiency, it is possible to the operating characteristics of supporting industry equipment well, there is good adaptability.
Figure 10 show embodiments of the invention five, and a kind of controllable silicon energy-saving circuit, described circuit includes converter VVVF
It is connected with converter VVVF through air switch QS and main switch KM with work drive motor M, system power supply bus L, converter VVVF
It is connected with work drive motor M.Also include the catalyst KM1 being arranged between converter VVVF and work drive motor M, and and converter
The first connection end of the silicon controlled rectifier KS, described silicon controlled rectifier KS that VVVF is in parallel be arranged on converter VVVF and
Between system power supply bus L, the second connection end of described silicon controlled rectifier KS is arranged on catalyst KM1 and work drive motor M
Between；Also including energy-saving controller 11, the control end G of described silicon controlled rectifier KS is connected with energy-saving controller 11, described
Energy-saving controller 11 is connected with catalyst KM1 and converter VVVF the most respectively.
As shown in figure 11, according to the controllable silicon energy-saving circuit of the present invention, step S1 is first carried out during operation, at Energy Saving Control
Setting load switching value A in device 11, then system power supply bus L is powered by step S2, connects circuit, and step S3 is to converter
VVVF carries out soft start, and step S4 converter VVVF output electric current drives work drive motor M；The most in step s 5, Energy Saving Control
Device 11 detects real time load state, the load-detecting system detection energy-saving controller being arranged on during step S6 in energy-saving controller 11
Load signal value B of 11 outputs；Then performing step S7, energy-saving controller 11 compares load switching value A and load signal value B；
If load switching value A is more than load signal value B, perform step S8 ', keep catalyst KM1 Guan Bi, then perform step S9 ', become
Frequently device VVVF drives work drive motor M；If load signal value B is more than load switching value A, performing step S8, catalyst KM1 disconnects,
Silicon controlled rectifier KS turns on, and then performs step S9, and three phase mains and work drive motor M are directly connected to and drive work drive motor
M。
Controllable silicon energy-saving circuit according to the present invention, it is preferable that described silicon controlled rectifier KS is bidirectional triode thyristor
Rectifier cell.
Controllable silicon energy-saving circuit according to the present invention, described work drive motor M rated power is more than described converter VVVF's
Rated power.
After the technology taking the present invention to propose, the controllable silicon energy-saving circuit of five according to embodiments of the present invention, by arranging
The silicon controlled rectifier in parallel with converter, the electric current needed for work drive motor can be provided by converter, it is also possible to by with
The silicon controlled rectifier offer that converter is in parallel, the rated power of work drive motor, more than the rated power of converter, reduces
Apolegamy requirement to converter in prior art, can use less converter to support bigger motor, be particularly suited for
The equipment of intermittence work, can run with energy saver mode when underloading (unloaded), can make work electricity when heavy duty (work)
Machine capacity operation, meets the power demand of equipment.Energy-saving efficiency is improve, it is possible to well while reducing energy-conservation cost
The operating characteristics of supporting industry equipment, has good adaptability.
Being described in detail the present invention above, specific case used herein is to the principle of the present invention and embodiment party
Formula is set forth, and the explanation of above example is only intended to help to understand method and the core concept thereof of the present invention；Meanwhile, right
In one of ordinary skill in the art, according to the thought of the present invention, the most all can change
Part, in sum, this specification content should not be construed as limitation of the present invention.
Through the above description of the embodiments, those skilled in the art it can be understood that to the present invention can be real
Execute.Certainly, above listed situation is merely illustrative, and the present invention is not limited to this.It should be appreciated by those skilled in the art, root
According to other deformation or the simplification of technical solution of the present invention, the present invention can be suitably applied to, and should be included in this
In bright scope.
Claims (8)
1. synchronizing a feed energy-saving circuit, described circuit includes converter and work drive motor, it is characterised in that also include energy-conservation
Controller and outside switched terminal XT, described energy-saving controller is connected with outside switched terminal XT and converter respectively；Set negative
Carrying switching value A, to system power supply bussed supply, connect circuit, converter carries out soft start, output current of frequency converter drives work
Make motor；Energy-saving controller detection real time load state, load signal value B of load-detecting system detection controller output；Ratio
Relatively load switching value A and load signal value B；If load switching value A is more than load signal value B, keep transducer drive；If load
Signal value B is more than load switching value A, outside switched terminal XT of startup, directly electric to work by three phase mains by synchronizing to feed
Machine is powered.
A kind of synchronization the most according to claim 1 feeds energy-saving circuit, it is characterised in that described load-detecting system is arranged
In energy-saving controller, and the comprising modules as energy-saving controller passes through the connection end of energy-saving controller and loads switched system
Connect.
A kind of synchronization the most according to claim 1 feeds energy-saving circuit, it is characterised in that described outside switched terminal XT
First connects end is arranged between converter and system power supply bus, and the second connection end of described outside switched terminal XT is arranged on
Between switching switch KM1 and work drive motor.
A kind of synchronization the most according to claim 1 feeds energy-saving circuit, it is characterised in that described outside switched terminal XT opens
Time dynamic, the electric current switching described converter is zero.
A kind of synchronization the most according to claim 1 feeds energy-saving circuit, it is characterised in that described by synchronizing feed directly
Current phase when being powered to work drive motor by three phase mains is identical with current phase during transducer drive.
6. feed energy-saving circuit according to a kind of synchronization the described in any one of claim 1 to 5, it is characterised in that described motor volume
Determine power more than described converter rated power.
A kind of synchronization the most according to claim 1 feeds energy-saving circuit, it is characterised in that described transducer control circuit bag
Including computing circuit and testing circuit, described computing circuit arranges two V/f algorithm models, and the first algorithm model includes variable V 1 He
F1, the second algorithm model includes variable V 2 and f2.
A kind of synchronization the most according to claim 7 feeds energy-saving circuit, it is characterised in that described transducer control circuit is led to
Cross the first algorithm model or the second algorithm model to calculate motor excitation optimal when motor load changes；If load switching value A
More than load signal value B, transducer control circuit calculates motor optimal when motor load changes with the second algorithm model
Excitation, and load is compensated for, the required frequency of output and the inverter of voltage；If load signal value B is more than load switching
Value A, calculates motor excitation optimal when motor load changes with the first algorithm model in transducer control circuit, and to load
It is compensated for, the required frequency of output and the inverter of voltage.
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| CN201610621626.3A CN106059444A (en) | 2016-07-29 | 2016-07-29 | Synchronous feeding energy-saving circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610621626.3A CN106059444A (en) | 2016-07-29 | 2016-07-29 | Synchronous feeding energy-saving circuit |
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| CN106059444A true CN106059444A (en) | 2016-10-26 |
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| CN201610621626.3A Pending CN106059444A (en) | 2016-07-29 | 2016-07-29 | Synchronous feeding energy-saving circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110868056A (en) * | 2019-12-25 | 2020-03-06 | 核工业理化工程研究院 | Dynamic switching device for remote control frequency converter |
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| CN101383590A (en) * | 2008-10-24 | 2009-03-11 | 哈尔滨理工大学 | Dragging device with high starting performance induction motor and frequency transformer cooperatively running |
| CN204179985U (en) * | 2014-10-31 | 2015-02-25 | 大力电工襄阳股份有限公司 | A kind of control device freely switched for drive motors frequency conversion and power frequency |
| CN205864319U (en) * | 2016-07-29 | 2017-01-04 | 浙江陀曼智造科技有限公司 | A kind of synchronization feeds energy-saving circuit |
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| JPH07174366A (en) * | 1993-12-17 | 1995-07-14 | Yanmar Diesel Engine Co Ltd | Outdoor machine power supplying mechanism for engine heat pump |
| CN101054148A (en) * | 2006-04-12 | 2007-10-17 | 苏州江南嘉捷电梯有限公司 | Escalator integrative frequency conversion controller based on bypass frequency conversion technology |
| CN101383590A (en) * | 2008-10-24 | 2009-03-11 | 哈尔滨理工大学 | Dragging device with high starting performance induction motor and frequency transformer cooperatively running |
| CN204179985U (en) * | 2014-10-31 | 2015-02-25 | 大力电工襄阳股份有限公司 | A kind of control device freely switched for drive motors frequency conversion and power frequency |
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| CN110868056A (en) * | 2019-12-25 | 2020-03-06 | 核工业理化工程研究院 | Dynamic switching device for remote control frequency converter |
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Application publication date: 20161026 |