CN107390733A - A kind of single-phase linear formula Stirling motor temperature control method - Google Patents

A kind of single-phase linear formula Stirling motor temperature control method Download PDF

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Publication number
CN107390733A
CN107390733A CN201710565047.6A CN201710565047A CN107390733A CN 107390733 A CN107390733 A CN 107390733A CN 201710565047 A CN201710565047 A CN 201710565047A CN 107390733 A CN107390733 A CN 107390733A
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temperature
voltage
value
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motor
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CN107390733B (en
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林明耀
谭广颖
杨公德
台流臣
谢程洲
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Southeast University
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Southeast University
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1927—Control of temperature characterised by the use of electric means using a plurality of sensors
    • G05D23/193—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces
    • G05D23/1931—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces to control the temperature of one space

Abstract

The invention discloses a kind of single-phase linear formula Stirling motor temperature control method, to the subregion temperature adjustment of multikilowatt powerful single-phase linear Stirling motor progress wide scope.This method under the requirement of wide temperature regulating range, manually adjust conveniently, can obtain preferable temperature modulation effect in different temperature provinces, environmental robustness is good by parameter.Impacted compared with traditional PID control, during regulation to caused by single-phase linear formula Stirling motor smaller, algorithm for power modulation process is smoother, is advantageous to extend electrical machinery life, strengthens reliability.

Description

A kind of single-phase linear formula Stirling motor temperature control method
Technical field
The present invention relates to Stirling drive and control of electric machine field, more particularly to a kind of single-phase linear formula Stirling motor temperature Spend control method.
Background technology
In recent years, cryogenic technique develops rapidly to adapt to the development of sophisticated technology.Stirling refrigeration is as cryogenic technique Important branch, be widely used in the fields such as military affairs, meteorology, Aero-Space, low-temperature electronics, cryogenic medicine, such as infrared distant Sense, tank armor and submarine dry, and much aspect has important application for cooling, extraordinary electronic equipment refrigeration, medical refrigerator etc., this The development prospect of special woods refrigeration machine is very wide.Simultaneously with its application popularization, the raising of refrigerating capacity, high-power High cooling power Sterlin refrigerator also will possess great development potentiality in for example civilian refrigeration of general cold industry.But due to sterlin refrigerator Technical costs is too high, and sterlin refrigerator mainly applies to military and space field at present, and its research in general cold field is still located In the starting stage, the drive control research to Stirling-electric hybrid is yet mainly for small-power, the small-sized Stirling motor of small cold. During temperature control is carried out to Stirling motor, because single-phase linear stirling refrigeration process is non-linear and has hysteresis Property, the actual refrigeration work consumption of motor with phase voltage there is also non-linear relation, traditional pid control parameter manually adjust it is cumbersome, Workload is big, and larger to mathematics model accuracy dependence, is difficult to obtain preferable control in the case of variation of ambient temperature Effect；The refrigeration precision being also difficult to ensure that simultaneously in wide temperature range.
The content of the invention
Goal of the invention：The purpose of the present invention is to be directed to multikilowatt high-power single-phase straight line Stirling motor, there is provided Yi Zhonggong Parameter tuning is convenient in industry application, while can meet wide scope temperature adjustment characteristic, the robustness in the case of variation of ambient temperature Strong single-phase linear formula Stirling motor temperature control method.
Technical scheme：To reach this purpose, the present invention uses following technical scheme：
Single-phase linear formula Stirling motor temperature control method of the present invention, comprises the following steps：
S1：According to the range of temperature T of institute's application environmentrangeTake its median point Tmid, in TmidAt a temperature of to SLSM electricity The actual cold end equilibrium temperature T of machinestdWith corresponding input side phase voltage UoSampled, and opening relationships model table Tstd= Table1(Uo)；
S2：To SLSM motors cold end in different temperatures TsampPower P is actually entered corresponding to loweractReach motor maximum work Rate PmaxWhen corresponding maximum voltage UomaxSampled, and opening relationships model Uomax=Table2 (Tsamp)；
S3：For SLSM motor total temperature scopes Twhole, choose T1、T2……Tk-1、Tk、Tk+1(k+1) individual temperature value altogether, And T (j+1) ＞ T (j), j=1~k, by total temperature scope TwholeIt is divided into k region；K values are selected to be sampled in step S1 Value number for reference, and no more than the points in Table1；
S4：The sampled value point in Table1 is correspondingly divided into k region, is respectively [Tl1, Tl2]、[Tl2, Tl3]…… [Tlk-2, Tlk-1]、[Tlk-1, Tlk]、[Tlk,Tlk+1], and each region is with temperature value TstdFor corresponding list in index covering step S3 Individual region；
S5：A series of right boundary value T obtained in query steps S4l2、Tl3……Tlk、Tlk+1Corresponding in Table1 Magnitude of voltageUpper voltage limit as the k temperature field divided in step S3；Query steps A series of left boundary value T obtained in S4l1、Tl2……Tlk-1、TlkThe corresponding magnitude of voltage U in Table1j=Table1-1 (Tlj), (j=1~k) is as the lower voltage limit that k temperature field is divided in step S3；Under the upper voltage limit and voltage of temperature field It is the voltage regime of the temperature field practical adjustments between limit；
S6：The motor input side phase voltage U obtained to real-time samplingo, electric current IoCalculate input power Pact, work as PactExceed Motor full value PmaxWhen, the electromechanical testing point temperature value T that is obtained using real-time samplingnowThe corresponding U in Table2omaxParameter The upper voltage limit value obtained in alternative steps S5, Voltage loop output is limited；
S7：The electromechanical testing point temperature value T obtained to real-time samplingnowWith temperature given value TrefSeek error amount Δ T= Tnow-Tref, T in step s 4refTemperature modulation is carried out in corresponding temperature field：As Δ T>Tthre, directly to total temperature domain most Big output Umax；As Δ T<Tthre, in step s 5 to voltage set-point U between the voltage bound of the temperature field of gainedref It is adjusted, works as T-obj<ΔT<0, by making UrefIt is incremental to adjust temperature, conversely, when 0<ΔT<T+obj, then U is maderefSuccessively decrease；It is logical Overregulate UrefChange step eUrefTo adjust steady temperature error；Wherein, T+objBe target refrigeration accuracy value on the occasion of T-objFor The negative value of target refrigeration accuracy value, TthreFor the temperature error threshold value into temperature adjustment of setting, UrefMutually electricity is inputted for motor The set-point of pressure；
S8：U is exported in step S7refOn the basis of actual output voltage is modulated, according to the input side phase voltage of return Sampled value UsampVoltage error Δ U is calculated, judges Δ U to adjust the dutycycle D of pwm signal change step eD, adjustment output The steady-state error of voltage, make output voltage UoEffectively tracking Uref。
Further, in addition to step S9：Correction adjustment to abovementioned steps：In the case where ambient temperature conditions change, To regional edge dividing value in step S5It is adjusted, that is, adjusts each voltage regime width：If Environment temperature uprises, then relaxes the width of voltage regime；Conversely, then reduce the width of voltage regime；Meanwhile pass through regulating step Δ U and eD parameter adjustment accuracy of temperature control and response speed in S8.
Beneficial effect：Compared with prior art, the invention has the advantages that：
1) under the requirement of wide temperature regulating range, parameter is manually adjusted conveniently, can be obtained in different temperature provinces Preferable temperature modulation effect, environmental robustness are good；
2) compared with traditional PID control, smaller, power is impacted to caused by single-phase linear Stirling motor during regulation Modulated process is smoother, is advantageous to extend electrical machinery life, strengthens reliability.
Brief description of the drawings
Fig. 1 is the control block diagram of SLSM motor temperature control methods in the specific embodiment of the invention；
Fig. 2 is the control flow chart of temperature modulation in the specific embodiment of the invention；
Fig. 3 is the region division schematic diagram of step S2 and S3 in the specific embodiment of the invention；
Fig. 4 is the temperature-responsive waveform of 1kW SLSM model machines in the specific embodiment of the invention.
Embodiment
Technical scheme is further introduced with reference to embodiment and accompanying drawing.
Present embodiment discloses a kind of single-phase linear formula Stirling motor temperature control method, as shown in figure 1, bag Include following steps：
S1：According to the range of temperature T of institute's application environmentrangeTake its median point Tmid, in TmidAt a temperature of to SLSM electricity The actual cold end equilibrium temperature T of machinestdWith corresponding input side phase voltage UoSampled, and opening relationships model table Tstd= Table1(Uo)；U in table Table1oValue is distributed the gamut that should cover motor operating mode, and suitably takes more points, uniformly Distribution.It is larger in view of the temperature lag and inertia of high-power SLSM motors, a sampled point can be set at interval of 5V or so.
S2：To SLSM motors cold end in different temperatures TsampPower P is actually entered corresponding to loweractReach motor maximum work Rate PmaxWhen corresponding maximum voltage UomaxSampled, and opening relationships model Uomax=Table2 (Tsamp)；In table Table2 TsampThe whole temperature range that motor refrigeration can reach should be covered, takes sampled point as far as possible intensive, is easy in S6 Carry out degree of accuracy when power monitoring and voltage modulated.A sampled point can be set at interval of 1 DEG C.
S3：For SLSM motor total temperature scopes Twhole, choose T1、T2……Tk-1、Tk、Tk+1(k+1) individual temperature value altogether, And T (j) ＞ T (j-1), 1≤j≤k, by total temperature scope TwholeIt is divided into k region；K values are selected to be sampled in step S1 Value number for reference, no more than the points in Table1.
S4：The sampled value point in Table1 is correspondingly divided into k region, is respectively [Tl1, Tl2]、[Tl2, Tl3]…… [Tlk-2, Tlk-1]、[Tlk-1, Tlk]、[Tlk, Tlk+1], but from S3 unlike, the region division in this step, each region should When with temperature value TstdCorresponding single region in S3 is covered for index, is had between two adjacent areas overlapping.Simultaneously according to environment temperature Change should suitably adjust boundary value.As environment temperature it is higher when, the width in each region should be widened；Conversely, it should then subtract Zonule width.It is specific as shown in Figure 3.
S5：A series of right boundary value T obtained in query steps S4l2、Tl3……Tlk、Tlk+1Corresponding in Table1 Magnitude of voltageUpper voltage limit as the k temperature field divided in step S3；Query steps A series of left boundary value T obtained in S4l1、Tl2……Tlk-1、TlkThe corresponding magnitude of voltage U in Table1j=Table1-1 (Tlj), (j=1~k) is as the lower voltage limit that k temperature field is divided in step S3；Under the upper voltage limit and voltage of temperature field It is the voltage regime of the temperature field practical adjustments between limit.
S6：The motor input side phase voltage U obtained to real-time samplingo, electric current IoCalculate input power Pact, work as PactExceed Motor full value PmaxWhen, the electromechanical testing point temperature value T that is obtained using real-time samplingnowThe corresponding U in Table2omaxParameter The upper voltage limit value obtained in alternative steps S5, Voltage loop output is limited.
S7：The electromechanical testing point temperature value T obtained to real-time samplingnowWith temperature given value TrefSeek error amount Δ T= Tnow-Tref, T in step s 4refTemperature modulation is carried out in corresponding temperature field：As Δ T>Tthre, directly to total temperature domain most Big output Umax；As Δ T<Tthre, in step s 5 to voltage set-point U between the voltage bound of the temperature field of gainedref It is adjusted, works as T-obj<ΔT<0, by making UrefIt is incremental to adjust temperature, conversely, when 0<ΔT<T+obj, then U is maderefSuccessively decrease；It is logical Overregulate UrefChange step eUrefTo adjust steady temperature error；Wherein, T+objBe target refrigeration accuracy value on the occasion of T-objFor The negative value of target refrigeration accuracy value, TthreFor the temperature error threshold value into temperature adjustment of setting, UrefMutually electricity is inputted for motor The set-point of pressure.It is as shown in Figure 2 to implement flow.
S8：U is exported in step S7refOn the basis of actual output voltage is modulated, according to the input side phase voltage of return Sampled value UsampVoltage error Δ U is calculated, judges Δ U to adjust the dutycycle D of pwm signal change step eD, adjustment output The steady-state error of voltage, make output voltage UoEffectively tracking Uref。
S9：Correction adjustment to abovementioned steps：In the case where ambient temperature conditions change, to zone boundary in step S5 ValueIt is adjusted, that is, adjusts each voltage regime width：If environment temperature uprises, put The width in Width funtion region；Conversely, then reduce the width of voltage regime.Meanwhile pass through Δ U and the eD parameter in regulating step S8 Adjust accuracy of temperature control and response speed.
Present embodiment has built experiment porch also directed to 1kW SLSM motors, and Fig. 4 gives the reality of model machine Waveform is tested, temperature after electricity is given on model machine in figure and gives Tref- 50 DEG C are changed to by -70 DEG C change to -105 DEG C change to -90 DEG C again Temperature-responsive waveform.From fig. 4, it can be seen that when SLSM motors use the control method, the test point temperature of motor can well with Track gives, and runs smoothly, and non-overshoot is small to electromechanical shock.

Claims (2)

  1. A kind of 1. single-phase linear formula Stirling motor temperature control method, it is characterised in that：Comprise the following steps：
    S1：According to the range of temperature T of institute's application environmentrangeTake its median point Tmid, in TmidAt a temperature of to SLSM motors Actual cold end equilibrium temperature TstdWith corresponding input side phase voltage UoSampled, and opening relationships model table Tstd=Table1 (Uo)；
    S2：To SLSM motors cold end in different temperatures TsampPower P is actually entered corresponding to loweractReach motor peak power Pmax When corresponding maximum voltage UomaxSampled, and opening relationships model Uomax=Table2 (Tsamp)；
    S3：For SLSM motor total temperature scopes Twhole, choose T1、T2……Tk-1、Tk、Tk+1(k+1) individual temperature value altogether, and T (j + 1) ＞ T (j), j=1~k, by total temperature scope TwholeIt is divided into k region；K values it is selected with step S1 sampled value it is more Few is reference, and no more than the points in Table1；
    S4：The sampled value point in Table1 is correspondingly divided into k region, is respectively [Tl1,Tl2]、[Tl2,Tl3]…… [Tlk-2,Tlk-1]、[Tlk-1,Tlk]、[Tlk,Tlk+1], and each region is with temperature value TstdFor corresponding list in index covering step S3 Individual region；
    S5：A series of right boundary value T obtained in query steps S4l2、Tl3……Tlk、Tlk+1The corresponding magnitude of voltage in Table1Upper voltage limit as the k temperature field divided in step S3；In query steps S4 A series of left boundary value T arrivedl1、Tl2……Tlk-1、TlkThe corresponding magnitude of voltage U in Table1j=Table1-1(Tlj), (j= 1~k) as the lower voltage limit that k temperature field is divided in step S3；It is between the upper voltage limit and lower voltage limit of temperature field The voltage regime of the temperature field practical adjustments；
    S6：The motor input side phase voltage U obtained to real-time samplingo, electric current IoCalculate input power Pact, work as PactMore than motor Full value PmaxWhen, the electromechanical testing point temperature value T that is obtained using real-time samplingnowThe corresponding U in Table2omaxParameter substitutes The upper voltage limit value obtained in step S5, Voltage loop output is limited；
    S7：The electromechanical testing point temperature value T obtained to real-time samplingnowWith temperature given value TrefSeek error amount Δ T=Tnow- Tref, T in step s 4refTemperature modulation is carried out in corresponding temperature field：As Δ T>Tthre, it is defeated directly to total temperature domain maximum Go out Umax；As Δ T<Tthre, in step s 5 to voltage set-point U between the voltage bound of the temperature field of gainedrefCarry out Regulation, works as T-obj<ΔT<0, by making UrefIt is incremental to adjust temperature, conversely, when 0<ΔT<T+obj, then U is maderefSuccessively decrease；Pass through tune Save UrefChange step eUrefTo adjust steady temperature error；Wherein, T+objBe target refrigeration accuracy value on the occasion of T-objFor target The negative value for accuracy value of freezing, TthreFor the temperature error threshold value into temperature adjustment of setting, UrefPhase voltage is inputted for motor Set-point；
    S8：U is exported in step S7refOn the basis of actual output voltage is modulated, according to the input side phase voltage of return sample Value UsampVoltage error Δ U is calculated, Δ U is judged to adjust the dutycycle D of pwm signal change step eD, adjusts output voltage Steady-state error, make output voltage UoEffectively tracking Uref。
  2. 2. single-phase linear formula Stirling motor temperature control method according to claim 1, it is characterised in that：Also include step Rapid S9：Correction adjustment to abovementioned steps：In the case where ambient temperature conditions change, to regional edge dividing value in step S5It is adjusted, that is, adjusts each voltage regime width：If environment temperature uprises, relax The width of voltage regime；Conversely, then reduce the width of voltage regime；Meanwhile adjusted by Δ U and the eD parameter in regulating step S8 Whole accuracy of temperature control and response speed.
CN201710565047.6A 2017-07-12 2017-07-12 Temperature control method for single-phase linear Stirling motor Active CN107390733B (en)

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Publication number Priority date Publication date Assignee Title
JP2007218438A (en) * 2006-02-14 2007-08-30 Sharp Corp Stirling engine
CN203068893U (en) * 2012-12-28 2013-07-17 中国电子科技集团公司第十六研究所 Free piston type Stirling cryocooler temperature controller
CN105571224A (en) * 2015-12-21 2016-05-11 中国电子科技集团公司第十一研究所 Universal type rotary Stirling cryocooler drive controller
CN106288479A (en) * 2016-07-28 2017-01-04 武汉高芯科技有限公司 Rotate the driving of separated type pneumatic stirling refrigerator and temperature control system and method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007218438A (en) * 2006-02-14 2007-08-30 Sharp Corp Stirling engine
CN203068893U (en) * 2012-12-28 2013-07-17 中国电子科技集团公司第十六研究所 Free piston type Stirling cryocooler temperature controller
CN105571224A (en) * 2015-12-21 2016-05-11 中国电子科技集团公司第十一研究所 Universal type rotary Stirling cryocooler drive controller
CN106288479A (en) * 2016-07-28 2017-01-04 武汉高芯科技有限公司 Rotate the driving of separated type pneumatic stirling refrigerator and temperature control system and method

Non-Patent Citations (2)

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Title
唐天敏 等: "一款基于DSP 的线性斯特林制冷机驱动控制电路设计", 《红外技术》 *
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