CN102694438A - Temperature estimation apparatus of motor, electrical power generating system with the temperature estimation appratus and temperature estimation method of motor - Google Patents
Temperature estimation apparatus of motor, electrical power generating system with the temperature estimation appratus and temperature estimation method of motor Download PDFInfo
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- CN102694438A CN102694438A CN2012100796017A CN201210079601A CN102694438A CN 102694438 A CN102694438 A CN 102694438A CN 2012100796017 A CN2012100796017 A CN 2012100796017A CN 201210079601 A CN201210079601 A CN 201210079601A CN 102694438 A CN102694438 A CN 102694438A
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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
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/14—Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
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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
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/60—Controlling or determining the temperature of the motor or of the drive
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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
- H02P2207/00—Indexing scheme relating to controlling arrangements characterised by the type of motor
- H02P2207/05—Synchronous machines, e.g. with permanent magnets or DC excitation
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- Power Engineering (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Temperature estimation apparatus of motor, electrical power generating system with the temperature estimation appratus and temperature estimation method of motor. The temperature estimation apparatus of motor provided in the invention possesses the components as following: magnetic flux density specified mechanism for specifying the magnetic flux density of a permanent magnet; a storage portion for storing the reference magnetic flux density specified by the magnetic flux density specified mechanism under the known temperature of the permanent magnet; and a temperature estimation portion for determining the temperature of the permanent magnet at a specific time based on the magnetic flux density specified by the magnetic flux density specified mechanism, the known temperature and the reference magnetic flux density. Thereby the information required for estimating the temperature of the permanent magnet is minimized.
Description
Technical field
The present invention relates to a kind of technology of temperature of the rotor that is used for inferring motor.
Background technology
In the past, known have have stator and can and be provided with the motor of the rotor of permanent magnet with respect to the rotation of this stator.In this motor,, then irreversibly produce the what is called demagnetization phenomenon of the magnetic flux density reduction of permanent magnet if the temperature of above-mentioned rotor surpasses set temperature.And if produce the demagnetization of permanent magnet, then the performance of motor reduces.Thereby, in order under the prerequisite of the performance that keeps motor, to use motor, need the temperature treatment of rotor.
For example in TOHKEMY 2004-222387 number, disclose a kind of motor, it has the Hall element that the mode of joining with the upper surface with permanent magnet is arranged at the magnetization element of rotor and is arranged at stator.Above-mentioned magnetization element has according to its temperature and characteristic that saturation flux density and permeability change.Above-mentioned Hall element detects the intensity in the magnetic field of above-mentioned magnetization element.And in this motor, the temperature of magnetization element is followed the temperature of permanent magnet and is changed, and utilizes Hall element to detect the intensity in the magnetic field of this magnetization element.The temperature of magnetization element based on the characteristic of the magnetization element of the relation of expression magnetization component temperature and saturation flux density, reach detected magnetic field intensity and by specific, be estimated to be the temperature of permanent magnet by the temperature of specific magnetization element.
But, in the motor that above-mentioned patent gazette is put down in writing, have for the temperature of inferring permanent magnet the problem that in advance needs the amount of information of a large amount of necessity.
Particularly; In this motor; Adopted the magnetization element of the characteristic that intensity with magnetic field under both fixed temperatures changes significantly; Thereby the temperature that can infer permanent magnet is the temperature near above-mentioned both fixed temperatures, on the other hand, and for temperature range from above-mentioned set temperature departure; In order to infer the temperature of permanent magnet, must in the gamut of the temperature range that needs are inferred, prepare and keep magnetizing the information (the for example chart of Fig. 4 of TOHKEMY 2004-222387 number) of intensity in temperature and the magnetic field of element.
Summary of the invention
The object of the present invention is to provide and a kind ofly can reduce the temperature estimation device of the motor of prior needed amount of information and the temperature estimation method of motor for the temperature of inferring permanent magnet.
In order to solve above-mentioned problem; The proportional this point of ratio of the magnetic flux density after the magnetic flux density before the temperature that present inventor etc. are conceived to the permanent magnet after the variations in temperature and the variations in temperature and the variations in temperature, the invention below having expected: the magnetic flux density through utilizing the permanent magnet separately before and after the variations in temperature with change before temperature infer the temperature after the variation.
That is, the temperature before order changes is T0, and making the magnetic flux density of the permanent magnet of this moment is B0, and the temperature after order changes is T1, and the magnetic flux density of order permanent magnet at this moment is B1, and at this moment, the relation of following formula (1) is set up.
T1=T0-1/m×（1-B1/B0） （1）
At this, m is the coefficient of stipulating according to the raw material of permanent magnet.Thereby, through using T0, B0 and B1, can calculate the temperature that T1 also is estimated as this T1 permanent magnet.
Particularly; The present invention is a kind of temperature estimation device; Be used for having stator and can inferring the temperature of above-mentioned permanent magnet with respect to the rotation of this stator and the motor that is provided with the rotor of permanent magnet; Have: the magnetic flux density particular organization is used for the magnetic flux density of specific above-mentioned permanent magnet; Storage part, be stored under the known condition of the temperature of above-mentioned permanent magnet by above-mentioned magnetic flux density particular organization specific the benchmark magnetic flux density; Temperature estimation portion, based on utilizing above-mentioned magnetic flux density particular organization by specific specific magnetic flux density, above-mentioned known temperature, said reference magnetic flux density and infer the temperature of the above-mentioned permanent magnet of above-mentioned specific magnetic flux density when specific.
According to the present invention, as stated, can be based on known temperature, benchmark magnetic flux density, specific magnetic flux density and infer the temperature of permanent magnet.Therefore, infer the prior art of the relevant information of the magnetic field intensity of magnetization element of required temperature range universe with needs and compare, can reduce needed in advance amount of information (known temperature and benchmark magnetic flux density).
Particularly, the said temperature portion of the inferring temperature that to infer above-mentioned permanent magnet based on said reference magnetic flux density and the ratio and the above-mentioned known temperature of above-mentioned specific magnetic flux density.
In the said temperature estimating device, preferred above-mentioned magnetic flux density particular organization has: detect and to use coil, be arranged at said stator and can produce the electromotive force with the big or small corresponding size of the magnetic flux density of above-mentioned permanent magnet; Voltage detection department can detect the voltage that above-mentioned detection is applied with coil; Operational part calculates the magnetic flux density of above-mentioned permanent magnet based on the detected voltage of above-mentioned voltage detection department.
In this mode, the magnetic flux density particular organization has detection with coil and voltage detection department and operational part.Therefore, can calculate the magnetic flux density of permanent magnet based on the voltage that detection is applied with coil.
At this; In aforesaid way; Can detect the electromotive force (voltage) that the size with the magnetic flux density of permanent magnet changes accordingly; So compare with prior art (TOHKEMY 2004-222387 number), can improve and infer the response (speed of following) of variation of temperature with respect to the variations in temperature of permanent magnet.Particularly, in above-mentioned prior art, detect the intensity in magnetic field of taking away the magnetization element of heat from permanent magnet, become the essential factor that above-mentioned response reduces so transmit the needed time to the heat of magnetization element from permanent magnet.Relative with it, under aforesaid way, do not infer temperature based on the electromotive force that the magnetic flux density with permanent magnet produces accordingly, so can improve above-mentioned response via the heat transmission.And then in above-mentioned prior art, the temperature of magnetization element is not according to permanent magnet but according to the temperature change around it, might permanent magnet to infer temperature incorrect.Relative with it, in aforesaid way, infer the temperature of permanent magnet based on the electromotive force corresponding with the magnetic flux density of permanent magnet, so owing to around the influence that receives of temperature little, can more correctly infer the temperature of permanent magnet.
In the said temperature estimating device, preferred above-mentioned voltage detection department detects and puts on above-mentioned detection with peak value in the voltage waveform of coil and frequency, and above-mentioned operational part is based on the magnetic flux density of above-mentioned peak value and the above-mentioned permanent magnet of frequency computation part.
In this mode, can calculate the magnetic flux density of permanent magnet based on peak value in the voltage waveform and frequency.At this, " peak value " may instead be effective value, and " frequency " may instead be the cycle.
In the said temperature estimating device; Preferred above-mentioned peak value of above-mentioned voltage detection department repeated detection and said frequencies; Above-mentioned operational part is calculated the mean value of above-mentioned peak value or the mean value or the maximum of maximum and frequency respectively, and uses these mean values or maximum to calculate the magnetic flux density of permanent magnet.
In this mode, can use the magnetic flux density of the mean value or the maximum value calculation permanent magnet of peak value and frequency.Therefore, for example detecting when being electrically connected, can relax peak value and the error of frequency of the variation of the impedance that is accompanied by converter with coil and converter.
In the said temperature estimating device; Preferred so have can with above-mentioned detection with coil between handing-over electric power the handing-over parts, can the connection status that above-mentioned handing-over parts and above-mentioned detection are connected with coil electric and with above-mentioned handing-over parts from carrying out the switching part of change action between the dissengaged positions of above-mentioned detection with the coil disconnection, above-mentioned voltage detection department is switched at above-mentioned switching part that detection puts on the voltage of above-mentioned detection with coil under the state of above-mentioned dissengaged positions.
In this mode, can detect down and put on the voltage of detection from detecting the state that breaks off with coil utilizing switching part will join parts with coil.Therefore, irrelevant with the variation of the impedance of handing-over parts, can more correctly detect with the voltage that produces in the coil.
In the said temperature estimating device; Preferred said stator has the stator coil that can produce with the electromotive force of the big or small corresponding size of the magnetic flux density of above-mentioned permanent magnet; And then have can and the said stator coil between the handing-over electric power the handing-over parts, above-mentioned detection is not electrically connected with above-mentioned handing-over parts with coil.
In this mode, can be provided with independently to detect with the stator coil that is connected in the handing-over parts and use coil.Therefore, irrelevant with the variation of the impedance of handing-over parts, can more correctly detect with the voltage that produces in the coil.
In the said temperature estimating device, preferred above-mentioned detection only is electrically connected with above-mentioned voltage detection department with coil.
In this mode, be not connected in addition with voltage detection department owing to detect with coil, put on the voltage that detects with coil so can more correctly detect.
In the said temperature estimating device; Preferred above-mentioned permanent magnet has protuberance also more outstanding than said stator on the axis direction of the rotating shaft of above-mentioned rotor; Above-mentioned detection is used for above-mentioned detection with the shield member that magnetically interdicts between coil and the said stator coil to separate from the said stator coil along above-mentioned axis direction and to dispose with the opposed mode of the protuberance of above-mentioned permanent magnet, between above-mentioned detection is with coil and said stator coil, to be provided with coil.
In this mode, can utilize shield member will detect and magnetically interdict with coil and stator coil.Therefore, the magnetic field that can reduce to produce in the stator coil thus, can more correctly be detected with the voltage that produces in the coil detecting the influence that brings with coil.
In the said temperature estimating device, preferred so that have the said stator of being arranged at and be used to detect said stator around the environment temperature test section of temperature, above-mentioned storage portion stores is by the detected temperature of above-mentioned environment temperature test section.
In this mode, can detect stator temperature on every side.Therefore; The roughly the same condition of the temperature around and the temperature of permanent magnet (when for example just having begun to make motor starting, or make motor stop for a long time after when starting once more) down through the temperature around detecting, can be with this temperature as above-mentioned known temperature.
In the said temperature estimating device, preferred above-mentioned magnetic flux density particular organization contains at least one physical quantity test section of intensity, the magnetic flux density in the magnetic flux, the magnetic field that are arranged at said stator and can detect above-mentioned permanent magnet.
In this mode, can detect the magnetic flux of permanent magnet, the intensity in magnetic field, at least one of magnetic flux density.Therefore, can infer the temperature of permanent magnet based on this magnetic flux density based on testing result specific magnetic flux density.
In addition, the electricity generation system that the present invention generates electricity for a kind of expansion that utilizes working fluid has the liquid feed pump of discharging above-mentioned working fluid; The evaporator that the working fluid of supplying with from above-mentioned liquid feed pump is heated; The expansion of the working fluid that utilization is derived from above-mentioned evaporator and the rotary body that rotates; The output shaft that rotates integratedly with above-mentioned rotary body; Link with above-mentioned output shaft and drive corresponding and generator that generate electricity with the rotation of above-mentioned rotary body; Carry out condenser condensing to driving above-mentioned rotary body rotation working fluid afterwards; Take in the accommodating container of above-mentioned rotary body, above-mentioned output shaft and above-mentioned generator; Said temperature estimating device with the temperature of inferring above-mentioned generator; Above-mentioned generator has stator and can rotate and be provided with the rotor of permanent magnet with respect to this stator; In above-mentioned accommodating container, be provided with the importing portion that is used to import above-mentioned working fluid and be arranged on the leading-out portion that is used to derive working fluid of the opposition side of above-mentioned importing portion across above-mentioned generator; The said temperature estimating device has instruction department, and this instruction department is inferred the temperature of above-mentioned permanent magnet and at least one of above-mentioned liquid feed pump, above-mentioned evaporator, above-mentioned condenser sent instruction made that above-mentioned permanent magnet is predefined target temperature based on the temperature of inferring of above-mentioned permanent magnet.
According to the present invention, as stated, can infer the temperature of permanent magnet based on known temperature, benchmark magnetic flux density, specific magnetic flux density.Therefore, with need be to the intensity in the magnetic field of the magnetization element of the universe of the temperature range of permanent magnet imagination the prior art of relevant information compare, can reduce needed in advance amount of information (known temperature and benchmark magnetic flux density).
In addition, in the present invention, utilize accommodating container to take in rotary body, output shaft and generator, and importing portion and leading-out portion are set in the both sides across generator of accommodating container.Therefore, import to after working fluid in the accommodating container makes the rotary body rotation, around generator, flow and outside accommodating container, derive from leading-out portion via importing portion.That is,, not only working fluid is used for the rotation of rotary body, can also be used for the cooling of generator according to the present invention.
And in the present invention, the temperature estimation device is inferred the temperature of permanent magnet, and based on inferring the temperature output order so that permanent magnet is maintained target temperature.Therefore, the situation that is cooled to can not to produce the abundant low temperature of demagnetization with permanent magnet being carried out necessary above cooling is compared, and can improve the generating capacity of generator.
In addition; The present invention is a kind of temperature estimation method; Be used for having stator and the temperature that can infer above-mentioned permanent magnet with respect to the rotation of this stator and the motor that is provided with the rotor of permanent magnet; Has following operation: under temperature around and the temperature of the above-mentioned permanent magnet condition about equally, measure the also preparatory process of the magnetic flux density of specific above-mentioned permanent magnet of above-mentioned temperature on every side; The certain working procedure of the magnetic flux density of specific above-mentioned permanent magnet behind above-mentioned preparatory process; Be based in the above-mentioned certain working procedure by specific magnetic flux density, in above-mentioned preparatory process, measured around temperature and in above-mentioned preparatory process by specific magnetic flux density infer above-mentioned permanent magnet temperature infer operation.
According to the present invention, as stated, can infer the temperature of permanent magnet based on known temperature, benchmark magnetic flux density and specific magnetic flux density.Therefore; With need permanent magnet in the prior art of the relevant information of the intensity in magnetic field of magnetization element of the temperature range universe imagined compare, can reduce needed in advance amount of information (known temperature of preparing in the preparatory process and benchmark magnetic flux density).
Description of drawings
Fig. 1 is the synoptic diagram that the integral body of the electricity generation system of expression execution mode of the present invention constitutes.
Fig. 2 is the cutaway view of concrete formation of the closed type generator of presentation graphs 1.
Fig. 3 is the cutaway view that the generator of Fig. 2 is amplified expression.
Fig. 4 is the IV-IV line cutaway view of Fig. 3.
Fig. 5 is the block diagram of electric formation of the electricity generation system of presentation graphs 1.
Fig. 6 is the flow chart of expression by the processing of the control part execution of Fig. 5.
Fig. 7 is the flow chart that the initial setting of presentation graphs 6 is handled.
Fig. 8 is the voltage oscillogram that is used to explain the physical quantity that the voltage detection department by Fig. 5 detects.
Fig. 9 is the figure suitable with Fig. 5 of the other execution mode of expression.
Figure 10 is the flow chart of expression by the processing of the control part execution of Fig. 9.
Figure 11 is the figure suitable with Fig. 3 of the other execution mode of expression.
Embodiment
Following with reference to description of drawings preferred implementation of the present invention.
Fig. 1 is the synoptic diagram that the integral body of the electricity generation system of expression execution mode of the present invention constitutes.
With reference to Fig. 1, the evaporator 3 that electricity generation system 1 has the liquid feed pump 2 of discharging working fluid, heat the working fluid of supplying with from this liquid feed pump 2, utilize the expansion of the working fluid that is directed from this evaporator 3 and working fluid that the closed type generator 4 that generates electricity, cooling are derived from this closed type generator 4 and make its condenser condensing 5, to the subcooler 6 that cools off by these condenser 5 condensed working fluids, be used for from this subcooler 6 not via above-mentioned liquid feed pump 2 ground to the by-pass valve 7 of evaporator 3 guiding working fluids, the electric power that will be generated electricity by above-mentioned closed type generator 4 control part 23 (with reference to Fig. 5) to the above-mentioned liquid feed pump of its converter of supplying with 21 (with reference to Fig. 5), control 2, evaporator 3, condenser 5 and subcooler 6.
Particularly, electricity generation system 1 has the first supplying tubing L1 that connects liquid feed pump 2 and closed type generator 4, the first derivation pipe arrangement L2 that is connected closed type generator 4 and liquid feed pump 2, makes working fluid cycles via these pipe arrangements L1, L2.Middle part at the first supplying tubing L1 is provided with above-mentioned evaporator 3, first derive pipe arrangement L2 middle part be provided with above-mentioned condenser 5 and subcooler 6.
3 pairs of working fluids that import via the first supplying tubing L1 of evaporator heat and make its evaporation.Particularly, the evaporator 3 of this execution mode have the stream that makes heat medium circulation, can make evaporation that the heat medium that in this stream, flows heats up with heating device 3a (with reference to Fig. 5) and the evaporation of flow velocity that can be adjusted in heat medium mobile in the above-mentioned stream with adjuster 3b (with reference to Fig. 5).And, through carrying out and flowing in heat exchange and the heated working fluid between the heat medium of the ratio lower temperature (90 ℃ ~ 100 ℃) in the above-mentioned stream.For example can utilize the warm water of discharging from manufacturing equipment etc., steam, heated air, discharge gas etc. as above-mentioned heat medium.
Closed type generator 4 makes screw impeller machine (rotary body) 10a, 10a rotation corresponding to the expansion of the working fluid after being heated by above-mentioned evaporator 3, thereby the generator that the output shaft 10b of order and screw impeller machine 10a links 11 moves and generates electricity.In addition, screw impeller machine 10a, 10a are the columned parts that on outer peripheral face separately, are formed with spiral helicine prominent bar.And, mesh each other through the prominent bar that makes screw impeller machine 10a, 10a, can form stream between the outer peripheral face of each screw impeller machine 10a, 10a and between each prominent bar.In addition, the sectional area that is formed on the stream between each screw impeller machine 10a, the 10a be set at from each screw impeller machine 10a, 10a one distolateral (from the left side of Fig. 2 to the right) broadens towards another is distolateral.Below, the concrete formation of closed type generator 4 is described.
Fig. 2 is the cutaway view of concrete formation of the closed type generator of presentation graphs 1.
With reference to Fig. 1 and Fig. 2, closed type generator 4 has: the rotating parts 10 that rotates by the expansion of working fluid, and the generator 11, the accommodating container 12 of taking in these rotating partss 10 and generator 11 that generate electricity corresponding with the rotation of this rotating parts 10, be arranged in this accommodating container 12 and can detect above-mentioned generator 11 around the environment temperature test sections 22 (with reference to Fig. 5) of temperature (temperature of the stator 11a of the generator of stating for example 11).
The output shaft 10b that rotating parts 10 has above-mentioned screw impeller machine 10a, 10a and is fixed in the side of these screw impeller machines 10a, 10a.The sectional area that is formed on the stream between each screw impeller machine 10a, the 10a with from the left of Fig. 2 towards right-hand and mode that broaden is gradually set.An output shaft 10b and a side's screw impeller machine 10a rotates integratedly.
With reference to Fig. 2, accommodating container 12 gather take in the rotating parts 10 that disposes in order from the left side of Fig. 2, after J1 of bearing portion and the generator 11 stated.Working fluid imports in the accommodating container 12 via the ingress pipe 19a of the left end that is arranged at accommodating container 12 among Fig. 2, and exports to the outside of accommodating container 12 via the export mouth 17c on the right side that is arranged at Fig. 2.And generator 11 is arranged between ingress pipe 19a and the export mouth 17c, so the working fluid cooling that generator 11 is imported via ingress pipe 19a.
Particularly, accommodating container 12 has the holding member 16 that keeps above-mentioned each screw impeller machine 10a, 10a, the cartridge 14 that extends to the left from this holding member 16, the cover 15 that is arranged at the left end of this cartridge 14, from what above-mentioned holding member 16 extended to the right bottom parts 17 is arranged.
Holding member 16 has body 16a, is installed on the parts of bearings 16b in the left side of this body 16a, establishes the 16c of portion from the edge that body 16a extends to the right, is formed at the flange part 16h that the right-hand member of the 16c of portion is established on this edge.Body 16a is provided with the reception hole 16d that is used to take in each screw impeller machine 10a, 10a, be used in being accommodated in this reception hole 16d each screw impeller machine 10a, introducing port 16e that 10a imports working fluid, be used for export mouth (first export mouth) 16f that the working fluid that is incorporated in each screw impeller machine 10a in the reception hole 16d, 10a guiding is derived and the J1 of bearing portion that is used for the output shaft 10b of supporting screw turbine 10a.Reception hole 16d is the hole that connects body 16a on the left and right directions.Introducing port 16e is arranged at the left end of body 16a, is communicated with reception hole 16d and opening to the left.Export mouth 16f is arranged at the right-hand member of body 16a, is communicated with reception hole 16d and opening to the right.The J1 of bearing portion is arranged at the inner side of reception hole 16d on the right side of each screw impeller machine 10a, with the output shaft 10b supporting of screw impeller machine 10a for rotating.In this such execution mode, the J1 of bearing portion is accommodated in the accommodating container 12, so also can working fluid be enclosed in the accommodating container 12 even if do not make the J1 of this bearing portion have air-tightness.In addition, in this execution mode, the part of taking in each screw impeller machine 10a, 10a among the body 16a constitutes the incorporating section, and the part of surrounding the incorporating section among the body 16a constitutes the part of accommodating container.
Parts of bearings 16b be surround screw impeller machine 10a output shaft 10b left end around parts.In the inboard of this parts of bearings 16b, be provided with the bearing portion J2 of left end supporting for rotating with the output shaft 10b of screw impeller machine 10a.Along establish the 16c of portion form the encirclement output shaft 10b that extends to the right from body 16a around tubular.
Cartridge 14 has the tubular body 14a that also extends to the left than above-mentioned parts of bearings 16b and is arranged at the installation portion 14b of the right-hand member of this tubular body 14a.Installation portion 14b is the parts that are used for the mode of the circulation that do not hinder gas tubular body 14a being installed on the body 16a of above-mentioned holding member 16.
Thereby the peristome in the left side of the tubular body 14a of the above-mentioned cartridge 14 of cover 15 sealings moves with these cartridge 14 associations and forms impeller unit room S1 in the left side of holding member 16.That is, impeller unit room S1 is arranged between holding member 16 and cartridge 14 and the cover 15, is the chamber that is used to take in each screw impeller machine 10a, 10a.Particularly, cover 15 have the openend that is installed on above-mentioned tubular body 14a shut 18, form stream and form parts 19, be arranged at by this stream and form the filter 20 the stream that parts 19 form from the outside of this shut 18 to the stream of the introducing port of above-mentioned each screw impeller machine 10a, 10a.Shut 18 is the discoideus parts that are installed on this tubular body 14a with the mode of the opening that stops up tubular body 14a.In the substantial middle position of this shut 18, form the hole that connects in the table.The guiding tube 19d that stream forms side plate 19c that parts 19 have the ingress pipe 19a that extends to the right from above-mentioned shut 18, the 19b of plectane portion that gives prominence to towards the circumferential outside from the right part of this ingress pipe 19a, extend to the left from the circumference of the 19b of this plectane portion, extends to the right from the above-mentioned plectane 19b of portion.Ingress pipe 19a constitutes from the stream of the working fluid on the right side of the 19b of left side (outside) to plectane portion of above-mentioned shut 18.Particularly, the inner cavity of ingress pipe 19a connects shut 18 and the 19b of plectane portion.The 19b of plectane portion has the little diameter dimension of internal diameter than this tubular body 14a, make and the medial surface of tubular body 14a between be formed with the gap.Thereby, between the medial surface of the lateral surface of the 19b of plectane portion and tubular body 14a, be formed with the stream of the working fluid of the left and right directions (direction in the table) that strides across the 19b of plectane portion.Guiding tube 19d constitutes from the left side of the 19b of plectane portion up to the stream to the working fluid of the introducing port 16e of each screw impeller machine 10a, 10a.Particularly, the inner cavity of guiding tube 19d connects the plectane 19b of portion, and the right part of guiding tube 19d be installed on above-mentioned holding member 16 body 16a the left side and make it possible to working fluid is imported in introducing port 16e.Thereby, utilize this stream to form parts 19, shown in the arrow Y1 of Fig. 2, form from the right side of the 19b of left side (outside) to plectane portion of shut 18 and from the right side of the 19b of plectane portion to the left side, and then from the left side of the 19b of plectane portion to the stream of introducing port 16e.Filter 20 is arranged at position and the position between 19b of plectane portion (side plate 19c) and the tubular body 14a in the left side of the 19b of plectane portion with the mode of intersecting with the stream shown in the above-mentioned arrow Y1.
In this execution mode, the first supplying tubing L1, cartridge 14 and cover 15 constitute the expansion that connects liquid feed pump 2 and body (incorporating section) 16a via evaporator 3 and use pipe arrangement.
There is bottom parts 17 to have bottom parts body 17a being arranged and be arranged at the filter 17d that this has the bottom of bottom parts body 17a of right side that the 16c of portion is established on the edge of being fixed in above-mentioned holding member 16.Bottom parts body 17a sealing is arranged along establishing the peristome on the right side of the 16c of portion, thereby to establish the 16c of portion association moving and at the right side of body 16a formation power compartment S2 with this edge.That is, power compartment S2 is arranged at body 16a and along establishing the 16c of portion and having between the bottom parts body 17a, is the chamber that is used to take in generator 11.Particularly, there is bottom parts body 17a to be provided with and is fixed in the groove 17e that the edge is established the export mouth 17c of the flange part 17b of the 16c of portion, perforation bottom, is formed at the inboard.Flange part 17b establishes the 16c of portion to stop the circulation of gas to connect airtight in be installed on this edge along the state of establishing the right side of the 16c of portion.Export mouth 17c is used to derive working fluid, and this export mouth 17c is provided with filter 17d.Groove 17e is used at the stator 11a of generator 11 and has between the medial surface of bottom parts body 17a forming the gap.Particularly, groove 17e order has the medial surface of bottom parts body 17a to cave in along circumferential intermittent ground and is arranged at a plurality of positions, and the stator 11a of generator 11 is held with the state with the medial surface butt that bottom parts body 17a is arranged that does not form each groove 17e.Thereby the such stream as working fluid shown in arrow Y3 of the gap between each groove 17e and the stator 11a plays a role.In addition, the stator 11a of generator 11 and the clearance G between the rotor 11b also play a role as the stream of working fluid shown in arrow Y2 suchly.Through making working fluid such flows and cooled electric generator 11 shown in these arrows Y2 and arrow Y3.And, such shown in arrow Y4 in the working oil that flows in the stream shown in these arrows Y2 and the Y3, derived from export mouth 17c via filter 17d.
Below, the action of above-mentioned electricity generation system 1 is described with reference to Fig. 1 and Fig. 2.
The working fluid of discharging from liquid feed pump 2 is heated evaporator 3, is guided to closed type generator 4 via the first supplying tubing L1.This working fluid is directed in the closed type generator 4 through ingress pipe 19a, and such shown in arrow Y1, the introducing port 16e to each screw impeller machine 10a, 10a is directed via filter 20.The working fluid that is directed to the stream between each screw impeller machine 10a, the 10a has the trend of expansion owing to the heating in above-mentioned evaporator 3; So make each screw impeller machine 10a, 10a rotation to above-mentioned stream being expanded the direction of opening, simultaneously right-hand to Fig. 2 to advancing.The working fluid of deriving from the stream between each screw impeller machine 10a, the 10a is such shown in arrow Y2, Y3 contact mobile on one side on one side and is derived from export mouth 17c with generator 11.The working fluid of such flows contacts the cooling that is used as this generator 11 on one side on one side with generator 11 shown in these arrows Y2 and Y3.In addition, the flow and the temperature that import to the working fluid of closed type generator 4 can be regulated by liquid feed pump 2, evaporator 3, condenser 5 and subcooler 6.Particularly, the control part stated after 23 convection cell supply pumps 2, evaporator 3, condenser 5 and subcooler 6 carries out FEEDBACK CONTROL and make generator 11 be set target temperature.
Shown in arrow Y4, the working fluid of deriving from closed type generator 4 guides to condenser 5 and subcooler 6 via the first derivation pipe arrangement L2 and quilt.The condensation that this condenser 5 has the stream that makes cooling water circulation, can cool off the cooling water that in this stream, flows with cooler 5a (with reference to Fig. 5), can be adjusted in cooling water mobile in the above-mentioned stream the condensation of flow velocity with adjuster 5b (with reference to Fig. 5).And, in this condenser 5, the cooling work fluid through the heat exchange between for example about 0 ~ 40 ℃ cooling water that carries out and in above-mentioned stream, flow.In addition, subcooler 6 have the stream that makes cooling water circulation, the supercooling that can cool off the cooling water that in this stream, flows with cooler 6a (with reference to Fig. 5) and the supercooling of flow velocity that can be adjusted in cooling water mobile in the above-mentioned stream with adjuster 6b (with reference to Fig. 5).In above-mentioned subcooler 6, the cooling work fluid through the heat exchange between for example about 0 ~ 40 ℃ cooling water that carries out and in above-mentioned stream, flow.And be condensed device 5 and subcooler 6 cooled working fluids are guided to above-mentioned liquid feed pump 2, are used to generating once more as described above.
Then, describe for the temperature controlling portion 23 that is used to control above-mentioned generator 11 with reference to Fig. 5.
B=k×Vm+f （2）
At this, B is the magnetic flux density of permanent magnet 11g, and k is the intrinsic constant of generator 1.
The magnetic flux density that storage part 26 storage is calculated by above-mentioned operational part 25 and by above-mentioned environment temperature test section 22 detected environment temperatures.Particularly, storage part 26 around about equally the condition of temperature of temperature and permanent magnet 11g (when for example making generator start at the beginning, or stop for a long time after when starting once more) storage is based on by environment temperature test section 22 detected environment temperatures and the magnetic flux density under this ambient temperature, calculated by above-mentioned voltage detection department 24 detected peak value Vm and frequency f down.
The temperature that permanent magnet 11g infers based on the environment temperature that is stored in above-mentioned storage part 26 and magnetic flux density, based on the magnetic flux density of being calculated by above-mentioned voltage detection department 24 detected peak value Vm and frequency f in temperature estimation portion 27.The temperature of particularly, inferring permanent magnet 11g based on following formula (1).
T1=T0-1/m×（1-B1/B0） （1）
At this, T0 is the environment temperature that is stored in storage part 26, and the magnetic flux density of under this ambient temperature, calculating is B0.In addition, B1 is based on by voltage detection department 24 detected peak value Vm and frequency f and the magnetic flux density of calculating.In addition, m is the coefficient of stipulating according to the raw material of permanent magnet 11g.Utilize this formula (1) to calculate and infer temperature T 1.
Instruction department 28 based on infer temperature that portion 27 infers by said temperature and at least one output flow control command of liquid feed pump 2, evaporator 3, condenser 5 and subcooler 6 so that permanent magnet 11g is predefined temperature.Promptly; Inferring temperature when being higher than predefined temperature, the instruction of the direction of the flow that instruction department 28 can convection cell supply pump 2 outputs increasing working fluids, perhaps/and the instruction of exporting the direction of the temperature decline that makes working fluid to evaporation with heating device 3a, evaporation with adjuster 3b, condensation with cooler 5a, condensation with adjuster 5b, supercooling with cooler 6a and supercooling with adjuster 6b.On the other hand; Inferring temperature when being lower than predefined temperature, the instruction of the direction of the flow that instruction department 28 can convection cell supply pump 2 outputs minimizing working fluids, perhaps/and the instruction of exporting the direction of the temperature rising that makes working fluid to evaporation with heating device 3a, evaporation with adjuster 3b, condensation with cooler 5a, condensation with adjuster 5b, supercooling with cooler 6a and supercooling with adjuster 6b.In addition; Instruction department 28 is being inferred temperature when being positioned at predefined temperature (temperature range), is used to keep the instruction (perhaps not exporting the instruction of the flow that is used to change working fluid) of the flow of working fluid at least one output of liquid feed pump 2, evaporator 3, condenser 5 and subcooler 6.
Below, with reference to Fig. 6 and Fig. 7 the processing of being carried out by control part 23 is described.
If, then carrying out initial setting based on the processing of control part 23, beginning handles T (preparatory process).Handle among the T at initial setting, at first under the temperature condition about equally of temperature around the generator 11 and permanent magnet, detect environment temperature T0 (step T1).Then, detect the voltage (peak value Vm and frequency f) (step T2), the judgement that put on stator coil 11d and whether voltage has been carried out the detection (step T3) of predefined number of times.
If judge discontented times N in this step T3, then carry out above-mentioned steps T2 repeatedly.On the other hand, if in step T3, be judged to be times N, then calculate the mean value (step T4) of testing result (peak value Vm and frequency f).Through calculating the mean value of testing result in this wise,, also can reduce the error of detected value even if when the impedance change of converter 21 (with reference to Fig. 5).In addition, in step T4, also can calculate the maximum of testing result.
Then, through the mean value of the calculating above-mentioned formula of (peak value Vm and frequency f) substitution (2) is calculated magnetic flux density B0.That is, this magnetic flux density B0 is that the temperature of permanent magnet 11g is the magnetic flux density under the condition of detected environment temperature T0 in step T1.And, in storage part 26, store these environment temperatures T0 and magnetic flux density B0 (step T6), return the main program of Fig. 6.
In main program, detect the current voltage (peak value Vm and frequency f) (step S1) that puts on stator coil 11d, judge whether voltage has been carried out the detection (step S2) of predefined number of times (number of times identical with above-mentioned steps T3) N.
If in this step S2, judge discontented times N, then carry out above-mentioned steps S1 repeatedly.On the other hand, if in step S2, be judged to be times N, then calculate the mean value (step S3) of testing result (peak value Vm and frequency f).Through calculating the mean value of testing result in this wise, even if when the impedance change of converter 21 (with reference to Fig. 5), also can reduce the error of detected value.In addition, in step S3, also can calculate the maximum of testing result.
Then, through with the mean value of the calculating above-mentioned formula of (peak value Vm and frequency f) substitution (2), calculate magnetic flux density B1 (step S4: certain working procedure).That is, this magnetic flux density B1 is the magnetic flux density under the not clear condition of the temperature of permanent magnet 11g.And, through with this magnetic flux density B1 and above-mentioned magnetic flux density B0 and the above-mentioned formula of environment temperature T0 substitution (1), calculate and infer temperature T 1 (step S5: infer operation).
Then, based on inferring temperature T 1 output temperature control command (step S6).Particularly; Inferring temperature T 1 when being higher than predefined temperature, the instruction of the direction of the flow of convection cell supply pump 2 outputs increasing working fluids, perhaps/and instruction from the direction that the temperature of working fluid descends at least one output of evaporator 3, condenser 5, subcooler 6 that make.On the other hand; Inferring temperature T 1 when being lower than predefined temperature, the instruction of the direction of the flow of convection cell supply pump 2 outputs minimizing working fluids, perhaps/and instruction from the direction that the temperature of working fluid rises at least one output of evaporator 3, condenser 5, subcooler 6 that make.In addition, inferring temperature T 1 when being positioned at predefined temperature (perhaps temperature range), output is used to keep the instruction (perhaps not exporting the instruction of the flow that is used to change working fluid) of the flow of working fluid.
Through the temperature of FEEDBACK CONTROL permanent magnet 11g in this wise, can access the result more excellent more than the electricity generation system of following comparative example.Particularly; In the electricity generation system of comparative example; Do not infer the temperature of permanent magnet, for the generation that prevents to demagnetize to the temperature of working fluid and pressure is managed and permanent magnet is cooled to fully low temperature (permanent magnet is carried out necessary above cooling).Particularly, in the electricity generation system of comparative example, the temperature of the working fluid between evaporator 3 and the closed type generator 4 is 80 ℃, and pressure is 0.8 MPaA.On the other hand, in the electricity generation system 1 of this execution mode, based on above-mentioned FEEDBACK CONTROL, the result can make that the temperature of the working fluid between evaporator 3 and the closed type generator 4 is 100 ℃, can make pressure rise to 1.2MPaA.In addition, in the both sides of comparative example and this execution mode, the temperature of the working fluid between closed type generator 4 and the condenser 5 all is 50 ℃, and pressure is 0.2MPaA.Can know from this result, in the electricity generation system 1 of this execution mode, can make the temperature and the pressure of the working fluid that imports closed type generator 4 compare rising, so can improve generating capacity with comparative example.
And, the processing of above-mentioned steps S1 ~ S6 via not shown operating portion the input electricity generation system 1 halt instruction before (before in step S7, being judged to be NO) carry out repeatedly.If import above-mentioned halt instruction (in step S7, being YES), then this processing finishes.
In above-mentioned electricity generation system 1, each screw impeller machine 10a, 10a, output shaft 10b and the J1 of bearing portion are accommodated in public accommodating container 12.Therefore, even if do not guarantee the air-tightness between body 16a and the output shaft 10b, also can the working fluid of the rotation that is used for each screw impeller machine 10a, 10a be enclosed in the accommodating container 12 by the J1 of bearing portion.Thereby, according to above-mentioned electricity generation system 1, compare the simplification that can realize constructing and the raising of durability with in the past bearing portion.
In addition, in the above-described embodiment, as and rotor rotated corresponding with the expansion of working fluid, illustration screw impeller machine 10a, 10a, but be not limited thereto, for example also can adopt the radial flow impeller machine.
In addition; In the above-described embodiment; Explained and gathered the accommodating container 12 of taking in each screw impeller machine 10a, 10a, the body 16a that takes in these screw impeller machines, output shaft 10b, the J1 of bearing portion and generator 11; The formation that has the accommodating container of taking in output shaft 10b, the J1 of bearing portion and generator 11 at least through employing; Even if do not guarantee the air-tightness between body 16a and the output shaft 10b, also can make the working fluid of each screw impeller machine 10a, 10a rotation be enclosed in the accommodating container with being used to by the J1 of bearing portion.
That kind as described above, in the above-described embodiment, at least one with convection cell supply pump 2, evaporator 3, condenser 5 and subcooler 6 controlled and made that permanent magnet 11g is a predefined temperature controlling portion 23.Therefore, the demagnetization of the permanent magnet 11g that temperature rises can be prevented to follow, thereby the reduction of generating capacity can be suppressed.
Particularly, in generator 11, if the temperature of rotor 11b surpasses both fixed temperatures, the phenomenon that is called as demagnetization of the magnetic flux density reduction of permanent magnet 11g takes place irreversibly then.And, if taking place, demagnetization then the generating capacity of permanent magnet 11g reduce.Relative with it, in the above-described embodiment, can be predefined temperature with the temperature maintenance of permanent magnet 11g, so can prevent the demagnetization of permanent magnet 11g.
In the above-described embodiment, the temperature T 1 that can infer permanent magnet 11g based on known temperature T0, benchmark magnetic flux density B0, specific magnetic flux density B1.Therefore, compare, can reduce preprepared amount of information (T0, B0 and B1) with the situation of the information of the chart that keeps expression temperature and the relation of magnetic flux density etc.
In the above-described embodiment, have stator coil 11d, voltage detection department 24, operational part 25.Therefore, can calculate the magnetic flux density of permanent magnet 11g based on the voltage that puts on stator coil 11d.
In the above-described embodiment, can be based on the peak value Vm in the voltage waveform and frequency f and calculate the magnetic flux density of permanent magnet.
At this; In the above-described embodiment; The electromotive force (voltage) that the size of the magnetic flux density of detection and permanent magnet 11g changes accordingly; So compare with prior art (TOHKEMY 2004-222387 communique), can improve and infer the response (speed of following) of variation of temperature with respect to the variations in temperature of permanent magnet.Particularly, in above-mentioned prior art, detect the intensity in magnetic field of taking away the magnetization element of heat from permanent magnet, become the main cause that makes above-mentioned response reduce so transmit the needed time to the heat of magnetization element from permanent magnet.Relative with it, in the above-described embodiment, do not infer temperature based on the electromotive force that produces corresponding to the magnetic flux density of permanent magnet 11g, so can improve above-mentioned response via the heat transmission.And then in above-mentioned prior art, the temperature of magnetization element is not according to the temperature of permanent magnet but according to the temperature change around it, might permanent magnet to infer temperature incorrect.Relative with it, in the above-described embodiment, infer the temperature of permanent magnet 11g based on electromotive force corresponding to the magnetic flux density of permanent magnet 11g, so receive the influence of environment temperature little, can more correctly infer the temperature of permanent magnet 11g.
In the above-described embodiment, use mean value or the maximum of peak value Vm and frequency f and calculate the magnetic flux density of permanent magnet 11g.Therefore, even if the impedance of the converter 21 that electrically is connected with stator coil 11d changes, also can relax the error of peak value Vm and frequency f.
In addition; In the above-described embodiment; Under the state that electrically connects stator coil 11d and converter 21; Detection puts on the voltage of stator coil 11d, but is not limited to this, also can for example under the state with stator coil 11d and converter 21 cut-outs, detect the voltage that puts on stator coil 11d.
Fig. 9 is the figure suitable with Fig. 5 that representes other execution mode.In following explanation, mark identical symbol and omit its explanation for the formation identical with Fig. 5.
The electricity generation system of this execution mode has: be arranged on connector 29 between stator coil 11d and the converter 21, be arranged at control part 23 and control the driving of above-mentioned connector 29 connector control part 31, detect the position of rotation test section 30 of position of rotation of the rotor 11b of above-mentioned generator 11.
The driving of connector control part 31 control connection device 29 between above-mentioned connection status and dissengaged positions.Particularly, connector control part 31 switched to dissengaged positions with connector 29 before utilizing voltage detection department 24 detection voltages.In addition, connector control part 31 is to switch to connection status based on arriving the mode that moment as the position of rotation of target connects stator coil 11d and converter 21 by the position of rotation of position of rotation test section 30 detected rotor 11b at rotor 11b with connector 29.Thus, in the front and back of the switching of connector 29, can make the phase place of the voltage that puts on converter 21 and the position of rotation (phase place) of rotor 11b integrate.
Below, the processing that the control part of being put down in writing with reference to Figure 10 key diagram 9 23 is carried out.
If the processing based on control part 23 begins, then after carrying out above-mentioned initial setting processing T, connector 29 is switched to dissengaged positions (step S01).Then carry out above-mentioned steps S1 and S2 and detect voltage, utilize the position of rotation (step S21) of position of rotation test section 30 detection rotor 11b afterwards.Then, based on this position of rotation, switch to connection status (step S22) with connector 29 opportunity of integrating in the position of rotation and the phase place of the voltage that puts on converter 21 of rotor 11b, and S3 divides a word with a hyphen at the end of a line to above-mentioned steps.
In this execution mode, can under the state that utilizes connector 29 cut-out converters 21 and stator coil 11d, detect voltage.Therefore, irrelevant with the variation of the impedance of converter 21, can correctly detect the voltage that puts on stator coil 11d.
In addition, in this execution mode, can utilize connector 29 to avoid the influence of the impedance of converter 21 as described above, so can omit the step S2 and the S3 of the mean value that is used to calculate voltage.
In addition, in this execution mode, between initial setting processed steps T1 and step T2 shown in Figure 7, insert above-mentioned steps S01, and can be between step T3 and step S5 inserting step S21 and step S22.Thus, irrelevant even if in initial setting is handled with the variation of the impedance of converter 21, also can correctly detect the voltage that puts on stator coil 11d.In this initial setting is handled, also can omit the step T3 and the step T4 of the mean value that is used to calculate voltage.
In addition, in the above-described embodiment, use coil, use the stator coil 11d of generator 11, but be not limited to this as the detection that is used to detect the electromotive force (voltage) that puts on permanent magnet 11g.For example also can outside the stator coil 11d of generator 11, the coil that other voltage detecting is used be set.Below, with reference to Figure 11 this execution mode is described.
In the generator 11 of this execution mode, rotor 11b is longer than stator 11a on the axis direction of rotating shaft 11e.Particularly, permanent magnet 11g (rotor 11b) has the protuberance 11h also more outstanding than stator 11a on the axis direction of rotating shaft 11e.
And, the generator 11 of this execution mode have be configured to and the opposed detection of protuberance 11h of permanent magnet 11g with coil 33, be arranged on this detection with the shield member 32 between the terminal stator coil 11d of the axis direction that is disposed at rotating shaft 11e among coil 33 and each the stator coil 11d.Detect with coil 33 from stator coil 11d configuration dividually on the axis direction of rotating shaft 11e.In addition, detection is not connected with converter 21 (with reference to Fig. 5 and Fig. 9) with coil 33, electrically connects with respect to above-mentioned voltage detection department 24 (with reference to Fig. 5 and Fig. 9).On the other hand, each stator coil 11d is not connected with voltage detection department 24, electrically is connected with above-mentioned converter 21.Shield member 32 will detect with magnetically blocking between coil 33 and each the stator coil 11d.
In the above-described embodiment, detection is set independently with coil 33 with respect to the stator coil 11d that is connected in converter 21.Therefore, irrelevant with the variation of the impedance of converter 21, can more correctly detect and put on the voltage that detects with coil 33.In addition, only be connected with coil 33, then can more correctly detect the voltage that puts on magnetic test coil with voltage detection department 24 if order detects.
In addition, in the above-described embodiment, utilize shield member 32 and magnetically blocking detect with coil 33 and stator coil 11d.Therefore, can reduce to result from of the influence of the magnetic field of stator coil 11d to stator coil 11d generation.Thus, can more correctly detect and put on the voltage that detects with coil 33.
In addition, in the above-described embodiment, through detection put on coil 11d, 33 voltage is calculated the magnetic flux density of permanent magnet 11g, but be not limited to this.At least one physical quantity testing agency of intensity, the magnetic flux density in the magnetic flux that can detect permanent magnet 11g, magnetic field for example can be set.Thus, can come specific magnetic flux density, can infer the temperature of permanent magnet 11g based on this magnetic flux density based on the testing result of physical quantity testing agency.In this case, preferred setting can specificly put on the mechanism of frequency of the voltage of stator coil 11d.
In addition, in the above-described embodiment, the point of inferring the temperature of permanent magnet 11g for the generator 11 that generates electricity corresponding to the rotation of screw impeller machine 10a, 10a has been described, but the object of inferring temperature is not limited to generator 11.Particularly, for the motor of rotor rotation, also can likewise infer the temperature of permanent magnet with above-mentioned execution mode corresponding to the electric power of supplying with from power supply.
Claims (13)
1. temperature estimation device is used for wherein, having having stator and can inferring the temperature of above-mentioned permanent magnet with respect to this stator rotation and the motor that is provided with the rotor of permanent magnet:
The magnetic flux density particular organization is used for the magnetic flux density of specific above-mentioned permanent magnet;
Storage part, be stored under the known condition of the temperature of above-mentioned permanent magnet by above-mentioned magnetic flux density particular organization specific the benchmark magnetic flux density;
Temperature estimation portion, based on by above-mentioned magnetic flux density particular organization specific specific magnetic flux density, above-mentioned known temperature, said reference magnetic flux density and infer the temperature of the above-mentioned permanent magnet of above-mentioned specific magnetic flux density when specific.
2. temperature estimation device as claimed in claim 1 is characterized in that,
Said temperature is inferred the temperature that above-mentioned permanent magnet is inferred based on said reference magnetic flux density and the ratio and the above-mentioned known temperature of above-mentioned specific magnetic flux density by portion.
3. according to claim 1 or claim 2 temperature estimation device is characterized in that,
Above-mentioned magnetic flux density particular organization has:
Detect and to use coil, be arranged at said stator and can produce the electromotive force with the big or small corresponding size of the magnetic flux density of above-mentioned permanent magnet;
Voltage detection department can detect and put on the voltage of above-mentioned detection with coil;
Operational part is based on calculating the magnetic flux density of above-mentioned permanent magnet by the detected voltage of above-mentioned voltage detection department.
4. temperature estimation device as claimed in claim 3 is characterized in that,
Above-mentioned voltage detection department detects and puts on above-mentioned detection with peak value in the voltage waveform of coil and frequency,
Above-mentioned operational part is based on the magnetic flux density of above-mentioned peak value and the above-mentioned permanent magnet of frequency computation part.
5. temperature estimation device as claimed in claim 4 is characterized in that,
Above-mentioned peak value of above-mentioned voltage detection department repeated detection and said frequencies,
Above-mentioned operational part is calculated the mean value of above-mentioned peak value or the mean value or the maximum of maximum and frequency respectively, and uses these mean values or maximum to calculate the magnetic flux density of permanent magnet.
6. temperature estimation device as claimed in claim 3 is characterized in that,
And then have:
The handing-over parts, can and above-mentioned detection join electric power between with coil;
Switching part can carry out change action between connection status that above-mentioned handing-over parts and above-mentioned detection are connected with coil electric ground and the dissengaged positions that above-mentioned handing-over parts are broken off with coil from above-mentioned detection,
Above-mentioned voltage detection department is switched at above-mentioned switching part to detect under the state of above-mentioned dissengaged positions and puts on the voltage of above-mentioned detection with coil.
7. temperature estimation device as claimed in claim 3 is characterized in that,
Said stator has the stator coil that can produce with the electromotive force of the big or small corresponding size of the magnetic flux density of above-mentioned permanent magnet,
And then have can and the said stator coil between the handing-over electric power the handing-over parts,
Above-mentioned detection is not electrically connected with above-mentioned handing-over parts with coil.
8. temperature estimation device as claimed in claim 7 is characterized in that,
Above-mentioned detection only is electrically connected with above-mentioned voltage detection department with coil.
9. temperature estimation device as claimed in claim 7 is characterized in that,
Above-mentioned permanent magnet has protuberance also more outstanding than said stator on the axis direction of the rotating shaft of above-mentioned rotor,
Above-mentioned detection with coil separating from the said stator coil along above-mentioned axis direction and to dispose with the opposed mode of the protuberance of above-mentioned permanent magnet,
Between above-mentioned detection is with coil and said stator coil, be provided with and be used for above-mentioned detection with the shield member that magnetically interdicts between coil and the said stator coil.
10. according to claim 1 or claim 2 temperature estimation device is characterized in that,
And then have the said stator of being arranged at and be used to detect said stator around the environment temperature test section of temperature,
Above-mentioned storage portion stores is by the detected temperature of above-mentioned environment temperature test section.
11. temperature estimation device according to claim 1 or claim 2 is characterized in that,
Above-mentioned magnetic flux density particular organization contains at least one physical quantity test section of intensity, the magnetic flux density in the magnetic flux, the magnetic field that are arranged at said stator and can detect above-mentioned permanent magnet.
12. the electricity generation system that the expansion that utilizes working fluid is generated electricity,
Have:
Discharge the liquid feed pump of above-mentioned working fluid;
The evaporator that the working fluid of supplying with from above-mentioned liquid feed pump is heated;
The expansion of the working fluid that utilization is derived from above-mentioned evaporator and the rotary body that rotates;
The output shaft that rotates integratedly with above-mentioned rotary body;
Link with above-mentioned output shaft and drive corresponding and generator that generate electricity with the rotation of above-mentioned rotary body;
Carry out condenser condensing to driving above-mentioned rotary body rotation working fluid afterwards;
Take in the accommodating container of above-mentioned rotary body, above-mentioned output shaft and above-mentioned generator;
With the claim 1 or the 2 described temperature estimation devices of the temperature of inferring above-mentioned generator,
Above-mentioned generator has stator and can rotate and be provided with the rotor of permanent magnet with respect to this stator,
In above-mentioned accommodating container, be provided with the importing portion that is used to import above-mentioned working fluid and be arranged on the leading-out portion that is used to derive working fluid of the opposition side of above-mentioned importing portion across above-mentioned generator,
The said temperature estimating device has instruction department, and this instruction department is inferred the temperature of above-mentioned permanent magnet and at least one of above-mentioned liquid feed pump, above-mentioned evaporator, above-mentioned condenser sent instruction made that above-mentioned permanent magnet is predefined target temperature based on the temperature of inferring of above-mentioned permanent magnet.
13. a temperature estimation method is used for having stator and the temperature that can infer above-mentioned permanent magnet with respect to the rotation of this stator and the motor that is provided with the rotor of permanent magnet,
Have following operation:
Under temperature around and the temperature of the above-mentioned permanent magnet condition about equally, measure the also preparatory process of the magnetic flux density of specific above-mentioned permanent magnet of above-mentioned temperature on every side;
The certain working procedure of the magnetic flux density of specific above-mentioned permanent magnet behind above-mentioned preparatory process;
Be based in the above-mentioned certain working procedure by specific magnetic flux density, in above-mentioned preparatory process, measure around temperature and in above-mentioned preparatory process by specific magnetic flux density infer above-mentioned permanent magnet temperature infer operation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-065644 | 2011-03-24 | ||
| JP2011065644A JP5707195B2 (en) | 2011-03-24 | 2011-03-24 | MOTOR TEMPERATURE ESTIMATION DEVICE, POWER GENERATION SYSTEM HAVING THE SAME, AND MOTOR TEMPERATURE ESTIMATION METHOD |
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| Publication Number | Publication Date |
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| CN102694438A true CN102694438A (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100796017A Pending CN102694438A (en) | 2011-03-24 | 2012-03-23 | Temperature estimation apparatus of motor, electrical power generating system with the temperature estimation appratus and temperature estimation method of motor |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5707195B2 (en) |
| KR (1) | KR101279307B1 (en) |
| CN (1) | CN102694438A (en) |
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| CN105144574A (en) * | 2013-04-26 | 2015-12-09 | 三菱电机株式会社 | Magnet temperature estimation device for permanent magnet motor and magnet temperature estimation method for permanent magnet motor |
| CN105424215A (en) * | 2014-09-12 | 2016-03-23 | 罗伯特·博世有限公司 | Measuring the temperature of the rotor of an electrical machine |
| CN106168512A (en) * | 2015-05-19 | 2016-11-30 | 本田技研工业株式会社 | The temperature estimating device of electric rotating machine |
| CN110611473A (en) * | 2018-06-05 | 2019-12-24 | 庞巴迪运输有限公司 | Method and device for determining the temperature of a rotor |
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| KR102030188B1 (en) | 2013-07-04 | 2019-10-08 | 현대모비스 주식회사 | Apparatus and Method for estimating rotor temperature of motor |
| CN106452194A (en) * | 2016-11-04 | 2017-02-22 | 深圳市道通智能航空技术有限公司 | Method, device and system for heating motors |
| EP3599715B1 (en) * | 2018-07-26 | 2022-08-24 | Siemens Gamesa Renewable Energy A/S | Assessing wind turbine generator rotor temperature |
| CN113824371B (en) * | 2020-06-03 | 2024-04-09 | 湖南中车时代电驱科技有限公司 | Rotor temperature detection method, system and device of permanent magnet synchronous motor |
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- 2012-02-24 KR KR1020120018837A patent/KR101279307B1/en active IP Right Grant
- 2012-03-23 CN CN2012100796017A patent/CN102694438A/en active Pending
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105144574A (en) * | 2013-04-26 | 2015-12-09 | 三菱电机株式会社 | Magnet temperature estimation device for permanent magnet motor and magnet temperature estimation method for permanent magnet motor |
| CN105144574B (en) * | 2013-04-26 | 2018-01-30 | 三菱电机株式会社 | The magnet temperature estimating device of motor with permanent magnet and the magnet temperature presumption method of motor with permanent magnet |
| US9893598B2 (en) | 2013-04-26 | 2018-02-13 | Mitsubishi Electric Corporation | Magnet temperature estimation device for permanent magnet motor and magnet temperature estimation method for permanent magnet motor |
| CN105424215A (en) * | 2014-09-12 | 2016-03-23 | 罗伯特·博世有限公司 | Measuring the temperature of the rotor of an electrical machine |
| CN106168512A (en) * | 2015-05-19 | 2016-11-30 | 本田技研工业株式会社 | The temperature estimating device of electric rotating machine |
| CN110611473A (en) * | 2018-06-05 | 2019-12-24 | 庞巴迪运输有限公司 | Method and device for determining the temperature of a rotor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012205341A (en) | 2012-10-22 |
| JP5707195B2 (en) | 2015-04-22 |
| KR20120109294A (en) | 2012-10-08 |
| KR101279307B1 (en) | 2013-07-15 |
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