CN104124911B - A kind of electric power supply control system and Stirling motor - Google Patents
A kind of electric power supply control system and Stirling motor Download PDFInfo
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- CN104124911B CN104124911B CN201410361210.3A CN201410361210A CN104124911B CN 104124911 B CN104124911 B CN 104124911B CN 201410361210 A CN201410361210 A CN 201410361210A CN 104124911 B CN104124911 B CN 104124911B
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Abstract
The invention discloses a kind of electric power supply control system and Stirling motor, belong to motor power supply technique field, system includes：First converting unit, the power input outside connection, for forming corresponding alternating current and exporting according to the direct current electric rectification of input, is powered with to the Stirling motor；Control unit, connects first converting unit, for according to sinusoidal waveform set in advance, controlling the alternating current of the first converting unit output with the sinusoidal waveform.The beneficial effect of above-mentioned technical proposal is：Any adjustment output lifts the operating frequency range of Stirling motor to the power work frequency of Stirling electric power system.Whole electric power supply control system is integrated in a PCB power supply boards, is easy to carry；Data to single-chip microcomputer can be frequently write into, so as to arbitrarily adjust the voltage and frequency of output；Without adjusting voltage manually, it is to avoid occur during regulation voltage unexpected；Operating environment requirements are relatively low, are not easily susceptible to the interference of outside environmental elements.
Description
Technical field
The present invention relates to motor power supply technique field, more particularly to a kind of electric power supply control system and Stirling motor.
Background technology
Now, free float-type Stirling motor, also referred to as second generation Stirling motor, have abandoned traditional external connection
Electric rotating machine, the substitute is the electromagnetic mechanism for being built in same sealing device.This motor does not have due to being linear electric motors
Having the speed-regulating energy-saving devices such as rotating mechanism, traditional frequency converter cannot apply.In the prior art, generally using contact type voltage regulator
The work of Stirling motor is driven, but contact type voltage regulator has larger limitation：
1) loss of contact type voltage regulator work capacity is big
2) working frequency of contact type voltage regulator between 50Hz/60Hz, can only limit the normal work of Stirling motor
Frequency；
3) existing contact type voltage regulator is heavier, and volume is larger, it has not been convenient to mobile；
4) using contact type voltage regulator brush wear can be made excessive for a long time, so as to cause defect, when changing brush due to
Must be equipped with same model causes to change cumbersome；
5) contact type voltage regulator needs regulation manually to the operating voltage of 200+V, be easier to occur in pressure regulation it is unexpected, and
Pressure regulation operation less easy to get started；
6) contact type voltage regulator can not be operated in high vibration and the environment that jolts.
The content of the invention
According to problems of the prior art, the technical side of a kind of electric power supply control system and Stirling motor is now provided
Case, specifically includes：
A kind of electric power supply control system, it is adaptable in Stirling motor；Wherein, including：
First converting unit, the power input outside connection, for forming corresponding friendship according to the DC inverter of input
Stream electricity is simultaneously exported, and is powered with to the Stirling motor；
Control unit, connects first converting unit, for according to sinusoidal waveform set in advance, control described first
Converting unit alternating current of the output with the sinusoidal waveform.
Preferably, the electric power supply control system, wherein, first converting unit is a H-bridge drive circuit；
The H-bridge drive circuit is further included：
Four switch modules, including
First switch module, input accesses the positive pole of a DC supply input；
Second switch module, input is connected to the output end of the first switch module, the second switch module
Input connects the negative pole of the DC supply input, the output end of the first switch module and the second switch module it is defeated
Enter and be provided with one first access point between holding；
3rd switch module, input connects the positive pole of the DC supply input, and output end is connected by one second access point
Connect first access point；
4th switch module, input connects second access point, and output end connects the negative pole of the DC supply input；
Load resistance, is connected between first access point and second access point；
Second access point as first converting unit output end；
The DC supply input connects the power input；
Described control unit controls four frequencies of the switch module break-make according to the default sinusoidal waveform, so that
Control from second access point alternating current of the output with the sinusoidal waveform.
Preferably, the electric power supply control system, wherein,
The switch module is further included：
Diode, output end connects the input of the switch module, and the input connection of the diode is described
The output end of switch module；
Control pipe, control end accesses described control unit, and the input of the control pipe connects the output of the diode
End, the output end of the control pipe connects the input of the diode；
Described control unit controls the corresponding diode to be opened and closed by controlling the break-make of the control pipe, so as to control
The corresponding switch module of system.
Preferably, the electric power supply control system, wherein, also include in first converting unit：
Filtration module, is connected between the load resistance and second access point, for flowing through the load electricity
The electric current of resistance is filtered, and exports alternating current after filtering by the output end of first converting unit.
Preferably, the electric power supply control system, wherein, also include：
Second converting unit, is connected between first converting unit and the power input, when the power input
During alternating current is converted into direct current and input to first converting unit when being input into for alternating current.
Preferably, the electric power supply control system, wherein, described control unit includes：
Setup module, the sinusoidal waveform is preset for user；
Directive generation module, connects the setup module, for setting corresponding control time according to the sinusoidal waveform
Point, and generate corresponding control instruction on each described control time point；
Control module, connects the directive generation module, for according to generation on each described control time point
Control instruction controls the frequency of the first converting unit switch, so that it is corresponding to control the first converting unit output to have
The alternating current of the sinusoidal waveform.
Preferably, the electric power supply control system, wherein, described control unit is controlled described first turn using SPWM modulation systems
Change unit alternating current of the output with the corresponding sinusoidal waveform.
Preferably, the electric power supply control system, wherein, described control unit is described using the control of bipolar SPWM modulation system
First converting unit alternating current of the output with the corresponding sinusoidal waveform.
Preferably, electric power supply control system, it is characterised in that described control unit is formed in a single-chip microcomputer.
Preferably, electric power supply control system, it is characterised in that be integrated in a PCB power supply boards.
The beneficial effect of above-mentioned technical proposal is：
1) the SPWM control modes being controlled by prior analog sine waveforms, any adjustment output to Stirling is powered
The power work frequency of system, lifts the operating frequency range of Stirling motor.
2) whole electric power supply control system is integrated in a PCB power supply boards, is easy to carry；
3) voltage and frequency for being exported by Single-chip Controlling, can frequently write into data to single-chip microcomputer, so as to arbitrarily adjust
The voltage and frequency of whole output；
4) operation for the electric power supply control system of the present invention is fairly simple, without regulation voltage manually, it is to avoid regulation electricity
Occur during pressure unexpected；
5) electric power supply control system of the present invention is integrated in PCB power supply boards, and operating environment requirements are relatively low, is not easily susceptible to the external world
The interference of environmental factor.
Brief description of the drawings
During Fig. 1 is preferred embodiment of the invention, a kind of structural representation of electric power supply control system；
During Fig. 2 is preferred embodiment of the invention, the circuit diagram of H-bridge drive circuit.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art obtained on the premise of creative work is not made it is all its
His embodiment, belongs to the scope of protection of the invention.
It should be noted that in the case where not conflicting, the embodiment in the present invention and the feature in embodiment can phases
Mutually combination.
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, but not as limiting to the invention.
Existing free float-type Stirling motor, is widely used in refrigerator or heat pump.So-called free float-type
Stirling motor, has one group of plane spring in its underpart, and the piston in Stirling motor is moved reciprocatingly with certain frequency, with band
Dynamic spring movement, so as to drive whole refrigerator or heat pump to be operated.
In the prior art, generally Stirling motor is driven to move back and forth using contact type voltage regulator.Due to different planes
Spring has each intrinsic spring frequency, and when carrying out pressure regulation using contact type voltage regulator, can cause the frequency of Stirling motor
Rate is relatively simple, so that the working frequency of Stirling motor and the unmatched situation of intrinsic frequency of respective planes spring are produced,
The fatigueization of spring is easily caused, the normal work of Stirling motor is influenceed.
And, the pressure regulation result of contact type voltage regulator is not accurate enough, and range of regulation is also smaller, and operating procedure is complex,
These problems can all cause that deviation occur in the operating voltage and working frequency of Stirling motor, influence the normal work of Stirling motor
Make.
In order to solve the above problems, in preferred embodiment of the invention, there is provided a kind of confession for being applied to Stirling motor
Electric control system A, it is specific as shown in figure 1, including：
First converting unit 1, the power input 2 outside connection, for being converted into the direct current of outside input to have
The alternating current of certain output frequency, further, this is had the confession of the alternating current feeding Stirling motor of certain output frequency
As the operating current of Stirling motor in electric system B, to control the reciprocating working frequency of Stirling motor.
Control unit 3, connects above-mentioned first converting unit 1, presets corresponding sine curve in advance for user, and control is single
Unit 3 has the sinusoidal alternating current of correspondence according to the sine curve control output of the first converting unit 1 for setting.
Further, in preferred embodiment of the invention, in the power input 2 of above-mentioned first converting unit 1 and outside
Between also include：
Second converting unit 4.In preferred embodiment of the invention, the second converting unit 4 is used for outside alternating current
During input is converted into corresponding DC supply input and delivers to above-mentioned first converting unit 1.
Further, in preferred embodiment of the invention：
When the outside input of power input 2 is for direct current, it is fed directly in the first converting unit 1 without conversion；
When the outside input of power input 2 is for alternating current, corresponding direct current is converted into by the second converting unit 4
And in delivering to the first converting unit 1.
In preferred embodiment of the invention, above-mentioned second converting unit 1 includes an AC to DC converter circuit.
In preferred embodiment of the invention, the implementation of AC to DC converter circuit can have various, skill of the invention
Art scheme it is of interest alternating current can be converted to galvanic function for the second converting unit 4, and non-interesting its internal tool
The circuit structure of body, therefore do not limit the circuit implementations of AC to DC converter circuit.
In preferred embodiment of the invention, as shown in Fig. 2 above-mentioned first converting unit 1 includes that a H bridges drive electricity
Road.The H-bridge drive circuit is further included：
Four switch modules.In preferred embodiment of the invention, as shown in Fig. 2 each switch module includes：
Diode (D1-D4).In preferred embodiment of the invention, the output end (negative pole) and switching molding of each diode
The input connection of block, the input (positive pole) of each diode is connected with the output end of switch module；
In preferred embodiment of the invention, diode plays a part of one-way conduction in circuit.
Control pipe (S1-S4).In preferred embodiment of the invention, each control pipe is connected to above-mentioned control unit 3.
Further, in preferred embodiment of the invention, the control end (base stage B) of each control pipe connects above-mentioned control
Unit 3, the input (emitter stage C) of each control pipe connects the input of corresponding switch module, the output of each control pipe
End (colelctor electrode E) connects the output end of corresponding switch module.
In preferred embodiment of the invention, above-mentioned control pipe is triode, plays a part of control electric current conducting.
In preferred embodiment of the invention, still as shown in Fig. 2 a first switch module positioned at upper half bridge with
It is provided with one first access point A between corresponding 3rd switch module of lower half-bridge, and positioned at one of upper half bridge
Second switch module and it is provided with one second access point B between corresponding 4th switch module of lower half-bridge；Then
A load resistance R is in series between one access point A and the second access point B.In preferred embodiment of the invention, accessed second
The output end of whole first converting unit 1 (i.e. H-bridge drive circuit) is set on point B.
In preferred embodiment of the invention, a filtering mould is in series between above-mentioned load resistance R and the second access point B
Block.Further, in preferred embodiment of the invention, filtration module is a filter inductance L, for by load resistance R
Electric current be filtered, and by alternating current after filtering by the second access point B export.
In sum, in preferred embodiment of the invention, control unit passes through control instruction in a control time point
Above-mentioned control pipe S1 and S4 is controlled to open, while controlling above-mentioned control pipe S2 and S3 to close；Now electric current is from DC supply input Vdc
Positive pole outflow, the negative pole of Vdc is flowed into via first switch module, load resistance R1 and the 4th switch module, to form one the
Primary Ioops.Now the voltage V0 at load resistance R1 two ends is equal to the positive voltage Vd of Vdc.
And in next control time point, control unit controls above-mentioned control pipe S1 and S4 to close by control instruction, together
When control above-mentioned control pipe S2 and S3 to open；Now electric current flows out from the positive pole of Vdc, via second switch module, load resistance
R1 and the 3rd switch module flow into the negative pole of Vdc, and to form a second servo loop, now the voltage Vo at load resistance R1 two ends is equal to
Negative voltage-the Vd of Vdc.
Control unit alternately switches switch module S1, S4 and S2, S3 with a predetermined frequency fs, so as in load resistance R1
It is upper to obtain an alternating current voltage with alternation square-wave waveform, the alternating cycles Ts=1/fs of the voltage.So, just can originally
The converting direct-current power into alternating-current power of input.
Further, in preferred embodiment of the invention, because the alternating current obtained on load resistance R1 has respectively
Subharmonic, therefore the alternating current is filtered using filter inductance L, to obtain a sine voltage that can be exported.
In preferred embodiment of the invention, electric capacity C1 in parallel, plays the work of separated by direct communication on DC supply input Vdc
With.
In preferred embodiment of the invention, as shown in figure 1, above-mentioned control unit 3 is actual being controlled using PWM mode
The break-make of the first converting unit 1.So-called PWM (Pulse Width Modulation, pulse width modulation) modulation systems according to
The change of respective loads carrys out the biasing of modulation transistor base stage or metal-oxide-semiconductor grid to realize transistor or metal-oxide-semiconductor ON time
Change, so as to realize the change of switching power supply output.This mode can make the output voltage of power supply in operation conditions change
When keep constant, be a kind of very effective technology being controlled to analog circuit using the data signal of microprocessor.
Therefore, above-mentioned control unit 3 is further included：
Setup module 31, in preferred embodiment of the invention, setup module 31 is preset accordingly just in advance for user
String waveform.Further, in preferred embodiment of the invention, the work of the Stirling motor that user is directed to according to power supply is frequently
Rate and operating voltage, the corresponding sinusoidal waveform of simulation setting.
In preferred embodiment of the invention, the process of above-mentioned setting sinusoidal waveform can automatically be given birth to by plug-in
Into user only needs to input service frequency and/or operating voltage.
Directive generation module 32, connects above-mentioned setup module 31.In preferred embodiment of the invention, directive generation module
32 according to the above-mentioned sinusoidal waveform being previously set, the corresponding multiple control time point of setting, and raw on each control time point
Into corresponding control instruction.Further, in preferred embodiment of the invention, can be in the crest of sinusoidal waveform and trough
Position corresponding control time point is set, and set on the control time point for for example corresponding to crest and open S1 and S4 and pass
The control instruction of S2 and S3 is closed, and the control opened S2 and S3 and close S1 and S4 is set on the control time point of correspondence trough
System instruction.Then the time interval in sinusoidal waveform between a crest and next trough is control unit 3 and controls first turn
The time interval of unit 1 is changed, the ac frequency of its reciprocal namely input to Stirling motor, therefore can be with this spy of this determination
The working frequency of woods motor.
Control module 33, connects above-mentioned directive generation module 32, for according to instruction generation abrading block 42 when each is controlled
Between point on generate corresponding control instruction, control the first converting unit 1 in respective switch module opening and closing, so as to control first
The direct current of input is converted into the alternating current with corresponding sinusoidal waveform by converting unit 1.
In preferred embodiment of the invention, above-mentioned control unit 3 uses SPWM (Sinusoidal PWM, sine
Pulsewidth modulation) modulation system, it is that modulation pulse mode is changed on the basis of PWM, pulse width time dutycycle is by sine
Aligned transfer, such output waveform can accomplish sinewave output by appropriate filtering.
Further, in preferred embodiment of the invention, above-mentioned control unit 3 is used and forms SPWM modulation methods with software
The Software Create method of formula is controlled to the first converting unit 1, i.e., the method that SPWM modulation is realized using software.
Further, in preferred embodiment of the invention, above-mentioned control unit 3 uses ambipolar SPWM modulation systems
First converting unit 1 is controlled.
In preferred embodiment of the invention, above-mentioned control unit 3 is formed in a single-chip microcomputer.Therefore, mesh of the invention
Be by default program in single-chip microcomputer, it is corresponding with parameter settings such as the models and working frequency of corresponding Stirling motor
Sinusoidal waveform, and will with the SPWM modulation systems control H-bridge drive circuit realization of Software Create method according to corresponding sinusoidal waveform
Direct current is converted into the alternating current with corresponding sinusoidal waveform and exports into Stirling motor, normal as Stirling motor
The power supply of work.Above-mentioned technical proposal enables to the power supply to Stirling motor controllable, and can in the light of actual conditions export most
The alternating current of suitable Stirling motor work.It is controlled using the SPWM modulation systems of Software Create method, its operation is simpler
Just, without manual voltage regulation, so as to avoid the generation of corresponding accident.
In preferred embodiment of the invention, above-mentioned electric power supply control system is included in one piece of PCB power supply board.It is such to set
Put so that the electric power supply control system is included in PCB power supply boards and can be convenient for carrying, be applied to not beneficial to electric power supply control system
In same Stirling motor.Simultaneously because electric power supply control system is controlled by single-chip microcomputer therein with pre-set programs, therefore only
Need to reprogram pre-set programs therein, you can be applied in the Stirling motor of different model.
In preferred embodiment of the invention, a kind of Stirling motor is also provided, including above-mentioned electric power supply control system.
Preferred embodiments of the present invention are the foregoing is only, embodiments of the present invention and protection model is not thereby limited
Enclose, to those skilled in the art, should can appreciate that done by all utilization description of the invention and diagramatic content
Scheme obtained by equivalent and obvious change, should be included in protection scope of the present invention.
Claims (9)
1. a kind of electric power supply control system, it is adaptable in Stirling motor；It is characterised in that it includes：
First converting unit, the power input outside connection, for forming corresponding alternating current according to the DC inverter of input
And export, it is powered with to the Stirling motor；
Control unit, connects first converting unit, for according to sinusoidal waveform set in advance, controlling first conversion
Unit alternating current of the output with the sinusoidal waveform；
Described control unit includes：
Setup module, the sinusoidal waveform is preset for user；
Directive generation module, connects the setup module, for setting corresponding control time point according to the sinusoidal waveform, and
Corresponding control instruction is generated on each described control time point；
Control module, connects the directive generation module, for according to the control generated on each described control time point
The frequency of instruction control the first converting unit switch, so that it is corresponding described to control the first converting unit output to have
The alternating current of sinusoidal waveform.
2. electric power supply control system as claimed in claim 1, it is characterised in that first converting unit is that a H bridges drive electricity
Road；
The H-bridge drive circuit is further included：
Switch module, including
First switch module, input accesses the positive pole of a DC supply input；
Second switch module, input is connected to the output end of the first switch module, the input of the second switch module
The input of the negative pole of the end connection DC supply input, the output end of the first switch module and the second switch module
Between be provided with one first access point；
3rd switch module, input connects the positive pole of the DC supply input, and output end connects institute by one second access point
State the first access point；
4th switch module, input connects second access point, and output end connects the negative pole of the DC supply input；
Load resistance, is connected between first access point and second access point；
Second access point as first converting unit output end；
The DC supply input connects the power input；
Described control unit controls the frequency of the switch module break-make according to the default sinusoidal waveform, so as to control from institute
State the second access point alternating current of the output with the sinusoidal waveform.
3. electric power supply control system as claimed in claim 2, it is characterised in that
The switch module is further included：
Diode, output end connects the input of the switch module, and the input of the diode connects the switch
The output end of module；
Control pipe, control end accesses described control unit, and the input of the control pipe connects the output end of the diode, institute
The output end for stating control pipe connects the input of the diode；
Described control unit controls the corresponding diode to be opened and closed by controlling the break-make of the control pipe, so as to control phase
The switch module answered.
4. electric power supply control system as claimed in claim 2, it is characterised in that also include in first converting unit：
Filtration module, is connected between the load resistance and second access point, for flowing through the load resistance
Electric current is filtered, and exports alternating current after filtering by the output end of first converting unit.
5. electric power supply control system as claimed in claim 1, it is characterised in that also include：
Second converting unit, is connected between first converting unit and the power input, when the power input is friendship
During alternating current is converted into direct current and input to first converting unit during stream electricity input.
6. electric power supply control system as claimed in claim 1, it is characterised in that described control unit uses SPWM modulation system controls
Make the alternating current of the first converting unit output with the corresponding sinusoidal waveform.
7. electric power supply control system as claimed in claim 6, it is characterised in that described control unit is modulated using bipolar SPWM
Mode controls the alternating current of the first converting unit output with the corresponding sinusoidal waveform.
8. electric power supply control system as claimed in claim 1, it is characterised in that described control unit is formed in a single-chip microcomputer.
9. the electric power supply control system as described in any one in claim 1-8, it is characterised in that be integrated in a PCB power supply boards
In.
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| CN201410361210.3A CN104124911B (en) | 2014-07-25 | 2014-07-25 | A kind of electric power supply control system and Stirling motor |
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| CN201410361210.3A CN104124911B (en) | 2014-07-25 | 2014-07-25 | A kind of electric power supply control system and Stirling motor |
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| CN101432962B (en) * | 2004-07-10 | 2011-09-21 | Lg电子株式会社 | Power variable-type motor driving circuit and driving method |
| EP1923989B1 (en) * | 2006-11-17 | 2010-06-02 | Nissan Motor Co., Ltd. | Power conversion system and power conversion control method |
| CN102255603B (en) * | 2011-07-27 | 2013-10-16 | 广州智光电气股份有限公司 | Comprehensive control system and method based on high voltage motor control and reactive power compensation |
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Effective date of registration: 20200413 Address after: 276800 north of the 334 provincial road east of Baoshan Road, Rizhao North Economic Development Zone, Shandong Patentee after: RIZHAO CHINA STIRLING TECHNOLOGY Co.,Ltd. Address before: 4 building, No. 1958 Jiangnan Road, hi tech Zone, Zhejiang, Ningbo, 315100 Patentee before: CHINA STIRLING ENGINE MANUFACTURING Ltd. |
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