JP6501427B2 - Ironless core rotary electric machine for operating with load exceeding rating, method of driving the same, and driving system including the same - Google Patents

Description

  The present invention relates to an iron-free core rotary electric machine for operating at loads exceeding the rating, a method of driving the same, and a drive system including the same.

  More specifically, the present invention relates to a stator comprising a lid type mount for fixing the end face of a cylindrical coil of iron-free core which can be energized, and a cylindrical or cup type rotatably opposed to the lid type mount. In a non-iron core rotary electric machine which forms an air gap including an air gap with a rotor (rotor) on the inner circumferential surface of which mounts are provided with a plurality of magnets, the air gap is included when operating with a load exceeding rating. The refrigerant liquid is supplied to the gap, and the heat generating cylindrical coil vaporizes the refrigerant liquid, and the latent heat of evaporation of the refrigerant liquid cools the cylindrical coil, so that the cylinder coil does not exceed the allowable upper limit temperature during rated operation. TECHNICAL FIELD The present invention relates to an iron-free core rotary electric machine adapted to operate with a load exceeding the rating by adjusting the amount, a method of driving the same, and a drive system including the same.

  The electric motor and the generator are rotary electric machines having the same structure. A rotating electrical machine will be described using an electric motor that converts electrical energy into mechanical energy. The electric motor outputs an electromagnetic force generated by the interaction between the magnetic field and the current. Classification methods vary, but are roughly divided into DC motors with brushes and brushless motors. The former uses magnets as a stator and the coils as a rotor, and the latter uses coils as stators. In the stator, magnets are used as a rotor (rotor), and both output an electromagnetic force to the outside from the rotor. On the other hand, according to the difference of the magnetic field generation method, it is divided into the winding field type and the permanent magnet type, and is classified into the one with and without the iron core in the coil. According to the above classification, a permanent magnet field type ironless core brushless electric motor is the subject of the present invention.

  The present invention relates to a coreless brushless motor comprising a permanent magnet field type and a cylindrical coil of a coreless core. The cylindrical iron core of the stator core is either constructed from a laminate of conductive metal sheets having a linear portion covered with an insulating layer, or from a linear conductor covered with an insulating layer It is.

  Although the electric motor may instantaneously exceed the rated current at startup, it is not normally assumed that the electric motor is continuously operated in the state of exceeding the rating. When the electric motor is operated in an overload state, that is, continuously operated at the rating or higher, the cylindrical coil of the electric motor generates heat more than expected due to the current.

  Depending on the structure and function of the electric motor, the coreless motor (CP50) manufactured as a test motor according to the present invention may not be used to operate the control section of the refrigerant liquid supply and operate under each condition exceeding the rating. When the load test is conducted, as described later, the allowable upper limit temperature of the cylindrical coil exceeds 130 ° C. in only several tens of seconds. The worst that can easily be deduced from this is that the cylindrical coil is burned and destroyed. Even if the failure does not occur, it is impossible to expect long-term normal operation of the coreless motor from the viewpoint of performance. It is needless to say that adding a cooling function to the electric motor in order to prevent the heat generation of the cylindrical coil and the performance deterioration of the electric motor due to the heating of the magnet is, of course, well known and is merely a conventional means.

  Regardless of the presence or absence of such a cooling function, the manufacturer's usage limit guaranteed against temperature rise of the coil or magnet during normal operation of the electric motor is displayed as a rating from the manufacturer (page 41 of Non-Patent Document 1). Ratings are proprietary standards guaranteed by the manufacturer, but are listed in the catalog and specifications. For example, the maximum output generated while the motor exhibits good characteristics at a predetermined voltage is the rated output, and the rotational speed when operating at the rated output is the rated rotational speed, and the torque T at that time is It is a rated torque, and the current at that time is a rated current. If the use is not specified, it is rated as a continuous rating that can be operated indefinitely. Other ratings include a short-term rating with a limited operating period, and a repetitive rating with cyclical operation and shutdown.

  The present invention relates to a coreless motor for operating at a load exceeding a rating developed based on the concept of always operating with overload. "Rating" as used herein refers to, for example, a case where a coreless motor is operated at a predetermined voltage or at a rated torque or rated output.

Incidentally, the coreless motor (CP 50) manufactured as a test motor is a so-called electric motor. Although the details will be described later, the rating here means that the supply amount of the refrigerant liquid is zero, the continuous operation is performed without operating the control part of the refrigerant liquid supply, and the temperature of the cylindrical coil is the allowable upper limit temperature 130 The rated torque T ₀ = 0.28 Nm, the rated current I ₀ = 9.7 Arms, the rated rotational speed n ₀ = 6537 rpm, and the rated output P ₀ = 191.67 W (FIG. 11). ).

  Next, it is well known to add a cooling function to the electric motor to prevent the performance deterioration of the electric motor due to the heat generation of the cylindrical coil and the heating of the magnet. This is recognized from the following prior art.

  JP 2012-523817 A (patent document 1) absorbs the refrigerant liquid having a boiling point lower than the operating temperature of the coil around the coil, and distributes the diffusion material that wets the coil to evaporate the heat of vaporization of the refrigerant liquid It is described that the coil is cooled.

  Japanese Patent Application Laid-Open No. 10-336968 (Patent Document 2) is a system in which the inside of a vehicle electrical rotating machine is cooled by circulating a gas-liquid two-phase including a radiator by utilizing a centrifugal pump action and a difference in height between rotors. Is described.

  In JP 2006-14522 A (patent document 3), a refrigerant whose boiling point temperature is equal to or lower than an allowable limit temperature is stored in a generator, and the refrigerant is vaporized during the operation of the generator to be liquefied in the generator alternately. It is described that the generator is efficiently cooled repeatedly.

  JP-A-2006-158105 (Patent Document 4) describes that liquid phase refrigerant is vaporized by heat generation of a rotor in a self-circulation path including a reserve tank of the refrigerant, and is efficiently cooled by the vaporized refrigerant. .

  JP 2009-118693 A (patent document 5) is a method for continuously supplying a small amount toward a wall surface and cooling it by vaporization latent heat so that the refrigerant is not unevenly distributed in the cooling wall surface of the rotor in the rotor cooling device. Is described.

  According to JP-A-2015-95961 (Patent Document 6), the refrigerant enclosed in the case is vaporized by the coil heat of the stator in the sealed case of the motor, liquefied in the heat radiating portion, and circulated in the sealed case. The motor cooling structure is described. This cooling structure is common to those described in Patent Document 3 and Patent Document 4.

  JP-A-2009-118686 (Patent Document 7) describes a cooling structure of a rotating electrical machine in which respective refrigerant flow paths are provided for cooling of a magnet and cooling of a coil, and means for switching these are provided. It is done.

  Japanese Patent Laying-Open No. 2014-17968 (Patent Document 8) describes a cooling system of a rotating electrical machine mounted on a hybrid vehicle. The rotary electric machine includes a coil portion wound around a stator core in which a large number of electromagnetic steel sheets are stacked. In the cooling system of a rotating electrical machine having an iron core disclosed in this, when the coil temperature of the coil portion exceeds 180 ° C. more than 10 times, the insulating coating around the coil portion of the coil portion evaporates or evaporates. Disappears, and the discharge pressure resistance performance is lowered, so that the controller is arranged to adjust the supply amount of the refrigerant so as to form the adhesion state of the refrigerant around the winding of the specific part so as not to do so It is.

  In Japanese Patent Laid-Open No. 6-217496 (Patent Document 9), an evaporation condensation chamber is provided inside the rotor of a generator, and a coolant is axially fed from outside through a jet flow, and the evaporation condensation chamber is utilized using centrifugal force. There is described a generator in which a waste liquid impeller is provided in a liquid chamber connected to a coolant liquid chamber which is biased to flow to the side.

  In JP-A-5-308752 (Patent Document 10), in a motor in which a rotor and an annular stator surrounding the rotor are housed in a hermetically sealed housing, an annular cavity in the housing in which the working fluid is enclosed. A heat dissipation structure of a motor having a pipe communicating with the pipe and a capillary having a capillary action is described.

  In JP-A-8-130856 (Patent Document 11), in a drive unit motor for an electric car consisting of a coil wound around a cylindrical core, cooling dropped from the cooling oil pump to the coil end via the cooling oil injection unit The circuit is described.

JP 2012-523817 gazette JP 10-336968 A Unexamined-Japanese-Patent No. 2006-14522 JP, 2006-158105, A JP, 2009-118693, A JP, 2015-95961, A JP, 2009-118686, A JP 2014-17968 A Japanese Patent Application Laid-Open No. 6-217496 Unexamined-Japanese-Patent No. 5-308752 JP-A-8-130856

"The Most Powerful Color Illustrated in the History: A Book That Understands All of the Latest Motor Technologies" Akatsu Reviewed by Natsume Publishing Planning Co., Ltd. (July 20, 2013 issue)

The technical problem inherent to the electric motor that is rotated by the electromagnetic action of the parts of the stator and the rotor is the heat generation of the coils of the armature disposed in the stator. The ability and magnitude of the electric motor are usually expressed by the output of the electric motor. The output P ₀ is represented by the product of the rotational speed n (rpm) and the torque T (N · m). When the input power P ₁ of the electric motor _(W), the difference between the input power P ₁ and the output P ₀ is discharged to the environment it is converted into heat energy as heat loss P _L. This is the heating action of the armature coil, which is an unavoidable technical problem of the electric motor. For example, not limited to coreless motors, when the electric motor continues to operate with a load exceeding the rating, the heat generation action overheats the armature coil's allowable upper limit temperature in a short time, causing burnout and destruction. It is a well-known matter. It also has the inherent problem that the heating action of the armature coil increases the resistance value of the armature coil to cause the output fluctuation of the electric motor, and therefore, the armature coil is completely controlled within a certain temperature range and the output fluctuation is Minimizing is also the ultimate technical challenge of electric motors.

The solution to the problem is how to control the temperature of the armature coil. As described above, various proposals have been made, but no drastic solution to the ultimate problem of completely controlling the armature coil within a constant temperature range has been achieved.

  However, the present inventors challenge the development of the electric motor based on the idea of always operating with overload, and the ironless core rotary electric machine for operating with the load exceeding the rating, its driving method, and drive including the same We realized the system and came to solve this technical problem. This can be confirmed from a drive test using a coreless motor (CP 50) manufactured according to an embodiment of the present invention.

The voltage of the coreless motor (CP50) was set to 24 V, and the torque was measured. This is the rated torque T ₀ = 0.28 Nm. The present inventors fully control the heat generation of the cylindrical coil which is an armature coil while continuously applying a load exceeding the rated torque T ₀ to the coreless motor (CP 50), thereby the coreless motor (CP 50). It has been confirmed that long-term operation is possible.

A first aspect of the present invention is a coreless electric rotating machine 10 for operation at loads above the ratings shown in the cross-sectional schematic of FIG. 1 and the cutaway perspective of FIG.
The inner periphery of the cylindrical mount 300 is a stator 2 comprising a lid-type mount 200 for fixing the end face 101 of the iron coil-free cylindrical core 100 and a cylindrical mount 300 rotatably opposed to the lid-type mount 200. A space 40 including an air gap is formed on the surface 310 with the rotor 3 provided with the plurality of magnets 4, and a path 8 for supplying the refrigerant liquid 80 to the space 40 is provided in the stator 2. And a drive unit 30 associated with the rotor 3, the iron-free rotary electric machine 10 for operating at loads above rated.

  In addition, it is possible to provide the stator 2 with the refrigerant liquid container 81 communicating with the passage 8 and further with the circulation means 82 communicating between the refrigerant liquid container 81 and the air gap 40.

As apparent from the first aspect of the present invention, the ironless core rotary electric machine 10 operates the drive unit 30 and operates the control unit 20 when operating with a load exceeding the rating, and the refrigerant liquid in the air gap 40 By supplying 80, the cylindrical coil 100 generating heat vaporizes the refrigerant liquid 80 and cools the cylindrical coil 100 by the latent heat of vaporization of the refrigerant liquid 80 so that the cylindrical coil 100 does not exceed the allowable upper limit temperature t _M during rated operation. By adjusting the supply amount of the refrigerant liquid 80, it operates with a load exceeding the rated value.

As one embodiment of the present invention, when the ironless core rotary electric machine 10 is operated with a load exceeding the rating, the control unit 20 operates so that the cylindrical coil 100 does not exceed the allowable upper limit temperature t _M The operation of adjusting the supply amount of the refrigerant liquid 80 and the operation of stopping the supply of the refrigerant liquid 80 to the air gap 40 so as not to fall below the lower limit temperature t _N at which the cylinder coil 100 is at least vaporized by the operation. Therefore, it is more preferable to maintain the cylindrical coil 100 in the range of the allowable upper limit temperature t _M and the lower limit temperature t _N.

  As another embodiment of the present invention, as shown in the schematic view of FIG. 5, the control unit 20 interlocks with the coil temperature detection sensor 21 that detects the temperature of the cylindrical coil 100 and the coil temperature detection sensor 21. A pump 22 for supplying the refrigerant liquid 80 to the air gap 40 and a controller 23 for adjusting the supply amount of the refrigerant liquid 80 by on / off command to the pump 22 can be included.

  As still another embodiment of the present invention, the control unit 20 interlocks with the coil temperature detection sensor 21 for detecting the temperature of the cylindrical coil 100 and the coil temperature detection sensor 21 as shown in the schematic view of FIG. The electromagnetic valve 24 for supplying the refrigerant liquid 80 to the air gap 40 from the refrigerant liquid container 81 disposed at a position higher than the cylindrical coil 100, and the controller 23 for adjusting the supply amount of the refrigerant liquid 80 by the open / close command to the electromagnetic valve 24 It can also be done.

  As another embodiment of the present invention, as shown in FIG. 5 or FIG. 6, the control unit 20 is configured to recover the gas phase 800 of the refrigerant liquid 80 in the refrigerant liquid container 81 in the liquid phase 80 by the circulation means 82. May be

  In yet another embodiment of the present invention, as shown in FIGS. 1 and 2, the drive shaft 1000 is secured to the central portion 340 of the cylindrical mount 300 and is rotatably coupled to the central portion 240 of the lid mount 200. The coreless electric rotating machine 10 may be deployed to

A second aspect of the invention is a coreless electric rotating machine 10 for operation at loads above the ratings shown in the cross-sectional schematic of FIG. 3 and the cutaway perspective of FIG.
It comprises a stator 2 consisting of a lid type mount 200 for fixing one end face 101 of a cylindrical coil 100 of iron-free core which can be energized, and a rotor 3 consisting of a cup type mount 400 rotatably opposed to the lid type mount 200 Form a first air gap 40 including an air gap, and the cup-shaped mount 400 constituting the rotor 3 has an open bottom one side and a closed bottom portion 410, and the inner yoke 420 concentric with the bottom portion 410. And the outer yoke 430 are integrated, and a plurality of magnets 4 are provided on the outer peripheral surface 422 of the inner yoke 420 and / or the inner peripheral surface 431 of the outer yoke 430 with a gap 41 in the circumferential direction. A slit 423 penetrating the inner yoke 420 is provided at the position of the inner yoke 420.

  It further arranges the cylindrical coil 100 to float in the first space 40 leaving the other end face 102 of the cylindrical coil 100 between the bottom 410 of the cup type mount 400 and the bottom portion 410 of the cup type mount 400. A second air gap 50 is formed on the inner peripheral side 110 of the cylindrical coil 100 between the lid 401 and the lid mount 200, a third air gap 60 is formed on the outer peripheral side 120 of the cylindrical coil 100, and the refrigerant liquid is formed in the first air gap 40. An iron-free core rotation for operation at loads above rating, provided with a path 8 for supplying 80, provided in the stator 2 and provided with a control 20 associated with the stator 2 and a drive 30 associated with the rotor 3 It is an electric machine 10.

  In addition, it is possible to provide the stator 2 with the refrigerant liquid container 81 communicating with the passage 8 and further with the circulation means 82 communicating the refrigerant liquid container 81 with the first gap 40.

As apparent from the second aspect of the present invention, the ironless core rotary electric machine 10 operates the drive unit 30 and operates the control unit 20 when operating with a load exceeding the rating, and The refrigerant liquid 80 is supplied to the inner side 421 of the inner yoke 420, and the cylindrical coil 100 that generates heat from the refrigerant liquid 80 sent to the cylindrical coil 100 via the slit 423 is vaporized, and the latent heat of evaporation of the refrigerant liquid 80 cools the cylindrical coil 100. By adjusting the supply amount of the refrigerant liquid 80 so that the cylindrical coil 100 does not exceed the allowable upper limit temperature t _M at the rated operation, it operates with a load exceeding the rated value.

As one embodiment of the present invention, when the ironless core rotary electric machine 10 is operated with a load exceeding the rating, the control unit 20 operates so that the cylindrical coil 100 does not exceed the allowable upper limit temperature t _M An operation of adjusting the supply amount of the refrigerant liquid 80, and an operation of stopping the supply of the refrigerant liquid 80 to the first gap 40 so that the cylinder coil 100 does not fall below the lower limit temperature t _N at least the refrigerant liquid 80 is vaporized. It is more preferable to maintain the cylindrical coil 100 in the range of the allowable upper limit temperature t _M and the lower limit temperature t _N by repeating the above.

  As another embodiment of the present invention, as shown in the schematic view of FIG. 5, the control unit 20 interlocks with the coil temperature detection sensor 21 that detects the temperature of the cylindrical coil 100 and the coil temperature detection sensor 21. It is possible to include a pump 22 for supplying the refrigerant liquid 80 to the inner side 421 of the inner yoke 420 of the first gap 40, and a controller 23 for adjusting the supply amount of the refrigerant liquid 80 by on / off command to the pump 22.

  As still another embodiment of the present invention, the control unit 20 interlocks with the coil temperature detection sensor 21 for detecting the temperature of the cylindrical coil 100 and the coil temperature detection sensor 21 as shown in the schematic view of FIG. Solenoid valve 24 for supplying the coolant liquid 80 from the coolant liquid container 81 arranged at a position higher than the cylindrical coil 100 to the inner side 421 of the inner yoke 420 of the first gap 40 and the opening / closing command to the solenoid valve 24 A controller 23 may also be included to adjust the supply volume.

  As another embodiment of the present invention, as shown in FIG. 5 or FIG. 6, the control unit 20 is configured to recover the gas phase 800 of the refrigerant liquid 80 in the refrigerant liquid container 81 in the liquid phase 80 by the circulation means 82. May be

  In yet another embodiment of the present invention, as shown in FIGS. 3 and 4, the drive shaft 1000 is fixed to the central portion 340 of the cup type mount 400 and rotatably coupled to the central portion 240 of the lid type mount 200. The coreless electric rotating machine 10 may be deployed to

  In one embodiment of the first and second aspects of the present invention, the cylindrical coil 100 is cylindrically formed of a stack of conductive metal sheets having axially spaced linear portions covered by an insulating layer. It is preferable that it is either one of the linear conductors covered with the insulating layer or formed in a cylindrical shape.

  In another embodiment of the first and second aspects of the present invention, the refrigerant liquid 80 is preferably any of water, ethanol, ammonia, liquid nitrogen, liquid helium, and a fluorine-based liquid.

A third aspect of the present invention is a method of driving a coreless electric rotating machine 10 for operation at loads above the ratings shown in FIGS. 1 and 2.
It comprises a stator 2 comprising a lid type mount 200 for fixing an end face 101 of a cylindrical core 100 of iron-free core and a cylindrical mount 300 rotatably opposed to the lid type mount 200. An air gap 40 including an air gap is formed by the rotor 3 on which the magnet 4 is disposed, and a path 8 for supplying the refrigerant liquid 80 to the air gap 40 is provided in the stator 2. A method of driving a coreless rotary electric machine 10 for operating at loads above rated, which deploys an associated drive 30.

  In the driving method of the present invention, the coreless rotary electric machine 10 is provided with a refrigerant liquid container 81 communicating with the passage 8 in the stator 2, and circulation means 82 communicating the refrigerant liquid container 81 with the air gap 40. Can be deployed further.

As is apparent from the third aspect of the invention, it operates the drive unit 30 to operate the iron-free rotary electric machine 10 with a load exceeding the rating, and operates the control unit 20 to 80 and supplying a cylindrical coil 100 that generates heat to vaporize the refrigerant liquid 80, cooling the cylindrical coil 100 in the latent heat of vaporization of refrigerant liquid 80, a cylindrical coil 100 is an allowable upper limit temperature t _M during rated operation And adjusting the amount of supply of the refrigerant liquid 80 so as not to exceed.

In one embodiment of the present invention, it further operates the control unit 20 to stop the supply of the refrigerant liquid 80 to the air gap 40 so that the cylinder coil 100 does not fall below the lower limit temperature t _N at least the refrigerant liquid 80 evaporates. And further including the step of maintaining the cylindrical coil 100 in the range between the allowable upper limit temperature t _M and the lower limit temperature t _N by repeating the above steps and the step of supplying the refrigerant liquid 80 to the air gap 40, preferable.

  As another embodiment of the present invention, it also includes a coil temperature detection sensor 21 for detecting the temperature of the cylindrical coil 100, and a pump 22 for supplying the refrigerant liquid 80, as shown in FIG. , Further including a controller 23 for adjusting the supply amount of the refrigerant liquid 80 by an on / off command to the pump 22, operating the coil temperature detection sensor 21 to detect the temperature of the cylindrical coil 100; The controller 23 operates the pump 22 to supply the refrigerant liquid 80 to the gap 40 and adjust the supply amount of the refrigerant liquid 80.

  As still another embodiment of the present invention, it is also linked with a coil temperature detection sensor 21 for detecting the temperature of the cylindrical coil 100 and a coil temperature detection sensor 21 as shown in FIG. An electromagnetic valve 24 for supplying the refrigerant liquid 80 to the air gap 40 from the refrigerant liquid container 81 disposed at a position higher than the cylindrical coil 100, and a controller 23 for adjusting the supply amount of the refrigerant liquid 80 according to the opening / closing command to the electromagnetic valve 24; And the step of detecting the temperature of the cylindrical coil 100 by operating the coil temperature detection sensor 21 and the controller 23 operating the solenoid valve 24 in conjunction with the step to supply the refrigerant liquid from the refrigerant liquid container 81 to the gap 40 And the step of adjusting the supply amount of the refrigerant liquid 80.

  As another embodiment of the present invention, as shown in FIG. 5 or FIG. 6, the control unit 20 further operates the circulation means 82 so that the vapor phase 800 of the refrigerant liquid 80 is transferred to the refrigerant liquid container 81. The driving method may further include the step of

  In another alternative embodiment of the present invention, it further comprises an iron-free core rotary electric, wherein the drive shaft 1000 is fixed to the central portion 340 of the cylindrical mount 300 and rotatably coupled to the central portion 240 of the lid mount 200. The driving method of the machine 10 can be used.

A fourth aspect of the present invention is a method of driving an ironless rotary electric machine 10 for operation at loads above the ratings shown in FIGS. 3 and 4.
It comprises a stator 2 consisting of a lid type mount 200 for fixing one end face 101 of a cylindrical coil 100 of iron-free core which can be energized, and a rotor 3 consisting of a cup type mount 400 rotatably opposed to the lid type mount 200 Form a first air gap 40 including an air gap, and the cup-shaped mount 400 constituting the rotor 3 has an open bottom one side and a closed bottom portion 410, and the inner yoke 420 concentric with the bottom portion 410. And the outer yoke 430 are integrated, and a plurality of magnets 4 are provided on the outer peripheral surface 422 of the inner yoke 420 and / or the inner peripheral surface 431 of the outer yoke 430 with a gap 41 in the circumferential direction. A slit 423 penetrating the inner yoke 420 is provided at the position of the inner yoke 420.

  It further arranges the cylindrical coil 100 to float in the first air gap 40, leaving a gap 411 between the other end face 102 of the cylindrical coil 100 and the bottom portion 410 of the cup type mount 400. A second air gap 50 is formed on the inner peripheral side 110 of the cylindrical coil 100 between the end face 401 and the lid type mount 200, a third air gap 60 is formed on the outer peripheral side 120 of the cylindrical coil 100, and the refrigerant is stored in the first air gap 40. A core 8 for supplying the fluid 80 is provided in the stator 2, and the control unit 20 associated with the stator 2 and the drive unit 30 associated with the rotor 3 are provided, for iron-free core for operating at over-rated load It is a driving method of the rotary electric machine 10.

  In the driving method of the present invention, the ironless core rotary electric machine 10 is provided with a refrigerant liquid container 81 communicating with the passage 8 in the stator 2 and circulation is made between the refrigerant liquid container 81 and the first gap 40. Means 82 can be further deployed.

As apparent from the fourth aspect of the present invention, it operates the drive unit 30 to operate the ironless core rotary electric machine 10 with a load exceeding the rating, and operates the control unit 20 to obtain the first air gap. The step of supplying the refrigerant liquid 80 to the inner side 421 of the inner yoke 420 of 40 and sending the refrigerant liquid 80 to the cylindrical coil 100 generating heat through the slit 423 and the cylindrical coil 100 generating heat vaporizes the refrigerant liquid 80 Cooling the cylindrical coil 100 by the latent heat of vaporization of 80, and adjusting the amount of supply of the refrigerant liquid 80 so that the cylindrical coil 100 does not exceed the allowable upper limit temperature t _M during rated operation;
It is characterized by including.

As one embodiment of the present invention, it further operates the control unit 20 to supply the refrigerant liquid 80 to the first air gap 40 so that the temperature does not fall below the lower limit temperature t _N at which the cylinder coil 100 evaporates at least the refrigerant liquid 80. And a step of supplying the coolant liquid 80 to the inner side 421 of the inner yoke 420 of the first gap 40 and sending the coolant liquid 80 to the cylindrical coil 100 generating heat through the slit 423 by repeating the steps of It is preferable to further include the step of maintaining the coil 100 in the range of the allowable upper limit temperature t _M and the lower limit temperature t _N.

  As another embodiment of the present invention, it also includes a coil temperature detection sensor 21 for detecting the temperature of the cylindrical coil 100, and a pump 22 for supplying the refrigerant liquid 80, as shown in FIG. , Further including a controller 23 for adjusting the supply amount of the refrigerant liquid 80 by an on / off command to the pump 22, operating the coil temperature detection sensor 21 to detect the temperature of the cylindrical coil 100; The controller 23 operates the pump 22 to supply the refrigerant liquid 80 to the inner side 421 of the inner yoke 420 of the first gap 40 and send the refrigerant liquid 80 to the cylindrical coil 100 generating heat via the slit 423 And adjusting the amount of supply.

  As still another embodiment of the present invention, it is also linked with a coil temperature detection sensor 21 for detecting the temperature of the cylindrical coil 100 and a coil temperature detection sensor 21 as shown in FIG. Solenoid valve 24 for supplying the refrigerant liquid 80 to the first gap 40 from the refrigerant liquid container 81 disposed at a position higher than the cylindrical coil 100, and a controller 23 for adjusting the supply amount of the refrigerant liquid 80 according to the open / close command to the solenoid valve 24 And operating the coil temperature detection sensor 21 to detect the temperature of the cylindrical coil 100, and the controller 23 operates the solenoid valve 24 in conjunction with the process, and the inner side of the inner yoke 420 of the first gap 40 And the step of sending the refrigerant liquid 80 to the cylindrical coil 100 that generates heat through the slits 423 and the supply amount of the refrigerant liquid 80. A step of settling may be a driving method comprising.

  As another embodiment of the present invention, as shown in FIG. 5 or FIG. 6, the control unit 20 further operates the circulation means 82 so that the vapor phase 800 of the refrigerant liquid 80 is transferred to the refrigerant liquid container 81. The driving method may further include the step of

  In another alternative embodiment of the present invention, it further comprises an iron-free core rotary electric, wherein the drive shaft 1000 is fixed to the central portion 440 of the cup-shaped mount 400 and rotatably coupled to the central portion 240 of the lid-shaped mount 200. The driving method of the machine 10 can be used.

  In one embodiment of the third and fourth aspects of the present invention, the cylindrical coil 100 is cylindrically formed of a stack of conductive metal sheets having axially spaced linear portions covered by an insulating layer. It is preferable that it is either one of the linear conductors covered with the insulating layer or formed in a cylindrical shape.

  In another embodiment of the third and fourth aspects of the present invention, the refrigerant liquid 80 is preferably any of water, ethanol, ammonia, liquid nitrogen, liquid helium, and a fluorine-based liquid.

  According to a fifth aspect of the present invention, there is provided an iron-free core rotary electric machine 10 shown by the schematic view of the iron-free core rotary electric machine 10 of FIGS. 1 and 2 and the schematic view of the drive system 1 of FIGS. It is a drive system 1 for operating with a load exceeding the rating.

  The inner periphery of the cylindrical mount 300 is a stator 2 comprising a lid-type mount 200 for fixing the end face 101 of the iron coil-free cylindrical core 100 and a cylindrical mount 300 rotatably opposed to the lid-type mount 200. An iron-free core rotary electric machine 10 having a passage 8 for forming a gap 40 including an air gap by a rotor 3 having a plurality of magnets 4 disposed on a surface 310 and supplying the refrigerant liquid 80 to the gap 40 in the stator 2; A coolant 30 is provided in the air gap 40 in conjunction with a drive device 30 for driving the iron-free rotary electric machine 10 operating in conjunction with the rotor 3 and a coil temperature detection sensor 21 for detecting the temperature of the cylindrical coil 100 disposed in the stator 2 A drive system 1 for operating a non-core rotating electrical machine 10 comprising a controller 20 for supplying 80, with a load exceeding a rating

  In the drive system 1 of the present invention, the ironless rotary electric machine 10 is provided with the refrigerant liquid container 81 communicating with the passage 8 in the stator 2 to communicate between the refrigerant liquid container 81 and the first gap 40. A circulation means 82 can be further deployed.

As apparent from the fifth aspect of the present invention, the drive system 1 operates the control device 20 when operating the drive device 30 and operating the iron-free rotary electric machine 10 with a load exceeding the rating, and The refrigerant liquid 80 is supplied to 40, the cylindrical coil 100 generating heat vaporizes the refrigerant liquid 80, and the latent heat of vaporization of the refrigerant liquid 80 cools the cylindrical coil 100, and the cylindrical coil 100 has an allowable upper limit temperature t _M during rated operation. By adjusting the supply amount of the refrigerant liquid 80 so as not to exceed, it is characterized in that the iron-free rotary electric machine 10 is operated at a load exceeding the rating.

As one embodiment of the present invention, drive system 1 further operates control device 20 when operating ironless core rotary electric machine 10 with a load exceeding the rating, and cylindrical coil 100 has an allowable upper limit temperature during rated operation. An operation of supplying the refrigerant liquid 80 to the air gap 40 so as not to exceed t _M , and a supply of the refrigerant liquid 80 to the air gap 40 so that the cylinder coil 100 does not fall below the lower limit temperature t _N at least the refrigerant liquid 80 evaporates. It is more preferable to maintain the cylindrical coil 100 in the range of the allowable upper limit temperature t _M and the lower limit temperature t _N by repeating the operation of stopping

  As another embodiment of the present invention, as shown in FIG. 5, the control device 20 adjusts the supply amount of the refrigerant liquid 80 by the pump 22 supplying the refrigerant liquid 80 and the on / off command to the pump 22. The drive system 1 includes the controller 23, and the controller 2 operates the pump 22 in conjunction with the coil temperature detection sensor 21 to supply the refrigerant liquid 80 to the gap 40 and adjust the supply amount of the refrigerant liquid 80. it can.

  As still another embodiment of the present invention, as shown in FIG. 6, the controller 20 adjusts the supply amount of the refrigerant liquid 80 by the electromagnetic valve 24 supplying the refrigerant liquid 80 and the open / close command to the electromagnetic valve 24. And the controller 23 to operate the electromagnetic valve 24 in conjunction with the coil temperature detection sensor 21 to supply the refrigerant liquid 80 to the air gap 40 from the refrigerant liquid container 81 disposed at a position higher than the cylindrical coil 100 The drive system 1 can also be used to adjust the 80 supply amount.

  As another embodiment of the present invention, as shown in FIG. 5 or FIG. 6, the control device 20 operates the circulation means 82 and the vapor phase 800 of the refrigerant liquid 80 is put into the refrigerant liquid container 81 as the liquid phase 80. Drive system 1 to collect the

  In another alternative embodiment of the present invention, it is further arranged to secure the drive shaft 1000 to the central portion 340 of the cylindrical mount 300 and to rotatably couple to the central portion 240 of the lid mount 200 The drive system 1 can also be made up of an ironless core rotating electric machine 10.

  The sixth aspect of the present invention is rating the ironless core rotary electric machine 10 shown by the schematic drawing of the ironless core rotary electric machine 10 of FIGS. 3 and 4 and the schematic drawing of the drive system 1 of FIGS. 5 and 6 Drive system 1 for operating with a load exceeding.

  It comprises a stator 2 consisting of a lid type mount 200 for fixing one end face 101 of a cylindrical coil 100 of iron-free core which can be energized, and a rotor 3 consisting of a cup type mount 400 rotatably opposed to the lid type mount 200 Form a first air gap 40 including an air gap, and the cup type mount 400 constituting the rotor 3 has a bottom portion 410 which is open on the one side and closed on the other side, and the inner portion 420 and the outer yoke are concentric on the bottom portion 410 A plurality of magnets 4 are disposed on the outer circumferential surface 422 of the inner yoke 420 and / or the inner circumferential surface 431 of the outer yoke 430 with a gap 41 in the circumferential direction, and the inner yoke 420 corresponding to the gap 41 is integrated. The slit 423 which penetrates the inner yoke 420 is provided at the position of.

  It further arranges the cylindrical coil 100 to float in the first air gap 40 with the other end face 102 of the cylindrical coil 100 between the bottom 410 of the cup type mount 400 and the bottom portion 410 of the cup type mount 400. A second air gap 50 is formed on the inner circumferential side 110 of the cylindrical coil 100 between the end face 401 and the lid type mount 200, a third air gap 60 is formed on the outer circumferential side 120 of the cylindrical coil 100, and the first air gap is formed in the stator 2. An iron-free core rotary electric machine 10 having a path 8 for supplying the refrigerant liquid 80 to the coil 40, a drive device 30 for driving the iron-free core rotary electric machine 10 operating in conjunction with the rotor 3, and a coil temperature provided in the stator 2 The ironless core rotary electric machine 10 is operated with a load exceeding the rating, which is composed of the control device 20 that supplies the refrigerant liquid 80 to the first gap 40 in conjunction with the detection sensor 21. A drive system 1.

  In the drive system 1 of the present invention, the ironless rotary electric machine 10 is provided with the refrigerant liquid container 81 communicating with the passage 8 in the stator 2 to communicate between the refrigerant liquid container 81 and the first gap 40. A circulation means 82 can be further deployed.

As apparent from the sixth aspect of the present invention, the drive system 1 operates the control device 20 when operating the drive device 30 and operating the iron-free rotary electric machine 10 with a load exceeding the rating, The refrigerant liquid 80 is supplied to the inner side 421 of the inner yoke 420 of the air gap 40, and the cylindrical coil 100 generating heat vaporizes the refrigerant liquid 80 sent to the cylindrical coil 100 via the slit 423 and the latent heat of the refrigerant liquid 80 It is characterized in that the coil 100 is cooled, and the supply amount of the refrigerant liquid 80 is adjusted so that the cylindrical coil 100 does not exceed the allowable upper limit temperature t _M at the time of rated operation.

As one embodiment of the present invention, drive system 1 further operates control device 20 when operating ironless core rotary electric machine 10 with a load exceeding the rating, and cylindrical coil 100 has an allowable upper limit temperature during rated operation. The operation of supplying the refrigerant liquid 80 to the inner side 421 of the inner yoke 420 of the first air gap 40 so as not to exceed t _M and the operation not to fall below the lower limit temperature t _N at which the cylinder liquid 100 vaporizes at least the refrigerant liquid 80 It is more preferable to maintain the cylindrical coil 100 in the range between the allowable upper limit temperature t _M and the lower limit temperature t _N by repeating the operation of stopping the supply of the refrigerant liquid 80 to the first gap 40.

  In another embodiment of the present invention, as shown in FIG. 5, the control device 20 supplies the refrigerant liquid 80 to the inner side 421 of the inner yoke 420 of the first gap 40, the pump 22 turns on the pump 22. The controller 23 operates the pump 22 in conjunction with the coil temperature detection sensor 21 including the controller 23 that adjusts the supply amount of the refrigerant liquid 80 by the off command, and the refrigerant liquid in the inner yoke 421 of the first gap 40 The driving system 1 can supply the refrigerant liquid 80 and send the refrigerant liquid 80 to the cylindrical coil 100 that generates heat through the slit 423 and can adjust the supply amount of the refrigerant liquid 80.

  In still another embodiment of the present invention, as shown in FIG. 6, the control device 20 supplies the refrigerant liquid 80 to the inner side 421 of the inner yoke 420 of the first gap 40, and the electromagnetic valve 24. The controller 23 operates the solenoid valve 24 in conjunction with the coil temperature detection sensor 21 and includes the controller 23 that adjusts the supply amount of the refrigerant liquid 80 according to the open / close command to the A driving system for supplying the refrigerant liquid 80 from the container 81 to the inner side 421 of the inner yoke 420 of the first gap 40 and sending the refrigerant liquid 80 to the cylindrical coil 100 generating heat through the slit 423 and adjusting the supply amount of the refrigerant liquid 80 It can also be 1.

  As another embodiment of the present invention, as shown in FIG. 5 or FIG. 6, the control device 20 operates the circulation means 82 and the vapor phase 800 of the refrigerant liquid 80 is put into the refrigerant liquid container 81 as the liquid phase 80. Drive system 1 to collect the

  In another alternative embodiment of the present invention, an iron-free core rotation is provided which secures the drive shaft 1000 to the central portion 440 of the cup mount 400 and is rotatably coupled to the central portion 240 of the lid mount 200. It can also be a drive system 1 comprising an electric machine 10.

  In the drive system 1 of the present invention, the cylindrical coil 100 of the ironless core rotary electric machine 10 is formed in a cylindrical shape by a laminate of conductive metal sheets having longitudinally spaced linear portions covered with an insulating layer. It is preferable that it is one of the linear conductors covered with the insulating layer and formed in a cylindrical shape.

In the drive system 1 of the present invention, the refrigerant liquid 80 is preferably any one of water, ethanol, ammonia, liquid nitrogen, liquid helium, and fluorine-based liquid.

It is a cross-sectional schematic diagram of the ironless core rotary electric machine provided with the rotor which consists of a cylindrical mount rotatably opposed to the stator which consists of a lid type | mold including a cylindrical coil which is embodiment of this invention. It is the perspective view which notched one part of the iron-free-core rotary electric machine shown by FIG. It is a cross-sectional schematic diagram of the ironless core rotary electric machine provided with the rotor which consists of a cup type | mold mount rotatably opposed to the stator which consists of a lid type | mold mount which is another embodiment of this invention. It is the perspective view which notched one part of the iron-free-core rotary electric machine shown by FIG. A control unit or control unit for controlling the flow rate of refrigerant liquid by a pump disposed with respect to the stator of the ironless core rotary electric machine shown in FIG. 1 or FIG. 3 and a drive unit or drive unit deployed with respect to the rotor FIG. 6 is a schematic view showing an iron-free core rotating electric machine including the following, a driving method thereof, and a driving system including the same. Control unit or control unit for controlling the flow rate of refrigerant liquid by the solenoid valve provided for the stator of the ironless core rotating electric machine shown in FIG. 1 or FIG. 3, and the drive unit or drive provided for the rotor Fig. 10 is a schematic view showing an iron-free core rotary electric machine including the method of driving the same, and a drive system including the same. It is a schematic diagram of a drive test of a measured motor (CP50) of an ironless core rotary electric machine provided with a rotor consisting of a cup type mount rotatably opposed to a stator consisting of a lid type mount including a cylindrical coil. FIG. 8 is a detailed view showing the dimensions of a measured motor (CP 50) shown in FIG. 7; The applied voltage of the motor to be measured (CP50) is set to 24 V, and even if the motor to be measured (CP50) is operated without supplying the refrigerant liquid (pure water) to the cylindrical coil, the upper limit temperature t that the cylindrical coil can tolerate The transition of the time (seconds) and the load torque and the temperature t of the cylindrical coil when the torque not exceeding _M (= 130 ° C) is used as the rated torque of the motor under test (CP50) for 720 seconds (12 minutes) from the start It is an excerpt. The load of the measured motor (CP 50) is increased by the variable load of the generator via the torque sensor shown in FIG. 7, and the lower limit at which the refrigerant liquid (pure water) evaporates without exceeding the allowable upper limit temperature t _M in a state in which not less than the temperature t _N, is operated so as to narrow the temperature difference _delta t of the minimum temperature t _c2 of the cylindrical coil during control the maximum temperature t _c1 of the cylindrical coil during control, when the applied voltage was set to 24V The control flow of the refrigerant liquid supply which measures the maximum torque and the refrigerant liquid flow rate. When the measured motor (CP50) is driven at load torque T (T ₁ = 0.33 Nm, T ₂ = 0.36 Nm, T ₃ = 0.39 Nm, T ₄ = 0.42 Nm) exceeding the rated torque Current (Arms), rotational speed (rpm), output (W), pump transfer amount (ml / min), total pump operation time in 10 minutes (sec), amount of refrigerant (pure water) in 10 minutes (ml) It is a table. The graph shows the current (Arms) and the amount of refrigerant (pure water) in 10 minutes (ml) with respect to the load torque T in the table of FIG. In the case of load torque T = 0.33 Nm, it represents transition of cylinder coil temperature t, transition of pump on / off timing, and transition of cylinder coil temperature t from 180 to 360 seconds after start, pulse transition of pump on / off . In the case of load torque T = 0.36 Nm, the cylinder coil temperature t, the pulse transition of the pump on / off, and the cylinder coil temperature t of 180 to 360 seconds after the start, the pulse transition of the pump on / off are shown. In the case of load torque T = 0.39 Nm, the cylinder coil temperature t, the pulse transition of the pump on / off, and the cylinder coil temperature t of 180 to 360 seconds after the start, the pulse transition of the pump on / off are shown. In the case of load torque T = 0.42 Nm, the cylinder coil temperature t, the pulse transition of the pump on / off, and the cylinder coil temperature t of 180 to 360 seconds after the start, the pulse transition of the pump on / off are shown. The load torque _T 1 = 0.33 nm (300 seconds) ⇒T ₄ = 0.42Nm (300 seconds) ⇒T ₁ = 0.33Nm in the case of a (120 seconds) cylindrical coil temperature t, of the pump on / off of the Pulse transition, coil temperature t from 180 to 420 seconds after start, pulse transition of on / off of pump. The measurement motor (CP 50) with varied load torque shown in FIG. 17 is used as the coolant liquid supply start temperature t _L1 = 110 ° C. (refrigerant liquid is supplied at a temperature t exceeding this), the coolant liquid stop temperature t _L2 = 90 ° C. (the temperature t below this is set to stop the supply of the refrigerant liquid) temperature t, pulse transition of the pump on / off, coil temperature t for 180 to 420 seconds from start, pump on / Indicates the pulse transition of off. It is a list of melting point ° C, boiling point ° C, and vaporization heat kJ / kg of typical refrigerant liquid. The driving test using the motor to be measured (CP50) shows the transition of the temperature t of the cylindrical coil in the case of cooling with a fluorine-based refrigerant with load torque T = 0.317 Nm and without cooling. (Reference figure) It is an iron-free core rotary electric machine which has a structure which supplies a refrigerant | coolant liquid only to the 2nd space | gap of a iron-free core rotary electric machine.

The present inventors completely control the temperature of a cylindrical coil which is an armature coil while continuously applying a load exceeding a rated torque T ₀ = 0.28 Nm to a coreless motor (CP 50), thereby coreless. It was confirmed that continuous operation of the motor (CP50) was possible.

  The basic structure of the ironless core rotary electric machine 10 (hereinafter referred to as the "coreless motor 10") provided with the stator 2 including the cylindrical coil 100 of the present invention is characterized in that firstly, one end is fixed to the stator 2 A laminated body of conductive metal sheets having longitudinally spaced linear portions covered with an insulating layer as an armature coil, or a cylindrical coil 100 formed into a cylindrical shape with a linear conductor covered with an insulating layer Was used. It is a cylindrical coil of iron-free core which can be energized, and preferably has a certain rigidity of 5 mm or less in thickness of 2 or 4 layers.

  A second feature of the basic structure is that one end face of the cylindrical coil 100 is closed by the inner peripheral face of the lid type mount 200 that constitutes the stator 2 and the other open end face of the cylindrical coil 100 is made of magnetic material The magnetic field is formed by the bottom of the cylindrical mount 300 or cup-shaped mount 400 of the rotor 3 and the outer peripheral surface of the cylindrical mount 300 provided with the plurality of magnets (permanent magnets) 4 or the outer yoke 430 of the cup-shaped mount 400 It is a coreless motor 10 having a structure that is inserted and arranged in the air gap including the air gap or the first air gap 40 in a floating state.

  Then, by feeding the coolant liquid 80 into the inner surface of the cylindrical coil 100 or the inner yoke 420 of the rotor 3 consisting of the cup type mount 400, the coolant liquid 80 generates heat when passing through the air gap where the magnetic field is formed. It is vaporized on the inner surface of the coil 100. Thus, the inner surface of the cylindrical coil 100 is cooled by latent heat of vaporization, and the entire cylindrical coil including the outer surface is instantaneously cooled by heat transfer. This is one of the features of the coreless motor cooling structure of the present invention.

The third feature of the basic structure arranges a control unit or control unit 20, which operates when operating the coreless motor 10 with a load exceeding the rating, in association with the stator 2, which raises the temperature rise of the cylindrical coil 100 during operation. It is to include the coil temperature detection sensor 21 which detects. This feature is that the control unit or the control device 20 adjusts the supply amount of the refrigerant liquid 80 so that the cylindrical coil 100 does not exceed the allowable upper limit temperature t _M during rated operation in conjunction with the coil temperature detection sensor 21. It is. As a result, a coreless motor 10 continuously operating with a load exceeding the rating is realized. As shown in FIG. 13 to FIG. 18 and FIG. 20, the coreless motor 10 of the present invention was subjected to a drive test assuming various overload conditions.

  FIG. 7 shows a motor under test according to an embodiment of the ironless core rotary electric machine 10 having a rotor 3 of a cup type mount 400 rotatably opposed to a stator 2 of a lid type mount 200 including a cylindrical coil 100. It is a schematic diagram of a drive test device of (CP50). FIG. 8 is a detailed view of the measurement structure of the measured motor (CP 50).

  As apparent from FIG. 7, the torque sensor 34 (UNIPULSE UTM II-5Nm) in which the torque gauge 35 (UNIPULSE TM 301) is connected to the output shaft 1000 of the coreless motor 10 which is the motor to be measured (CP50) has a diameter Φ = 6 mm. The generator 32 (m-link CPH 80-E) is connected via the connection. The power generated by the generator 32 is consumed by the variable load 33 (m-link VL 300), and the coreless motor 10 is given an arbitrary load and driven. The current of the coreless motor 10 was measured by inserting a wattmeter 31 (HIOKI PW3336) between the drive unit or the drive device 30 (three-phase PWM method m-link MLD 750-ST) and the coreless motor 10. The power meter 31 can measure the current I (A), the voltage V (V), and the power Pi (W).

  Next, a control unit or control device 20 (m-link TH 300) including a CPU is connected via a device (GRAPHTEC GL-100) that records the temperature t and voltage by the coil temperature detection sensor 21 installed in the cylindrical coil 100. The temperature t and the voltage are input. The controller or controller 20 operates the refrigerant liquid supply pump 22 (NITTO UPS-112) at a temperature t set appropriately, and performs a stopping operation to bring the refrigerant liquid container 81 into the first gap 40 of the coreless motor 10. The refrigerant liquid 80 is supplied. The flow rate of the refrigerant liquid 80 is adjusted by changing the driving voltage of the refrigerant liquid supply pump 22 by the refrigerant flow variable device 26 (TOKYO-RIKOSHA TYPE RSA-5) disposed in association with the control unit or the control device 20. I made it. The coreless motor 10 further has a plurality of slits 423 in the axial direction on the path 8 including the pipe 82 and the inner yoke 420 of the rotor 3.

  The dimensions of the coreless motor 10 which is a measured motor shown in FIG. 8 will be outlined. The axial length of the output shaft connected and fixed to the stator 2 and rotatably connected to the rotor 3 is L = 81.7 mm. One side of the rectangular bottom of the stator 2 is x = 50 mm, the outer diameter of the outer yoke of the rotor 3 is = 4 = 46.3 mm, the inner diameter is == 40 mm, and the thickness Δ = 3.15 mm. The diameter of the rotor shaft is = 2 = 22.5 mm, which corresponds to the inner diameter Φ of the inner yoke 420. The outer diameter is = 2 = 27.5 mm, and the thickness is Δ = 2.5 mm. The thickness of the four magnets 4 disposed on the inner surface of the outer yoke 430 is Δ = 3.5 mm. The width of the air gap formed by the inner yoke 420 and the outer yoke 430 is Ψ = 2.75 mm, and the thickness of the cylindrical coil 100 deployed in a floating state in the air gap is Δ = 1.50 mm.

  In a driving test using the coreless motor 10 which is a motor to be measured (CP 50), the function to spray the pure water 80 which is the refrigerant liquid directly to the cylindrical coil 100 and cool the cylindrical coil 100 which generates heat by vaporization latent heat of the pure water 80 This is to verify that continuous operation of the coreless motor 10 is possible even under load conditions that exceed the rating due to the effect and the cooling action.

The test procedure of the coreless motor 10 is as follows. The voltage applied to the drive unit or drive device 30 (three-phase PWM method m-link MLD 750-ST) (hereinafter referred to as “drive device 30”) shown in FIG. 7 was set to a voltage V ₀ = 24 (V). Although it is possible to set the voltage V ₀ to 36 (V) or 48 (V) higher than 24 (V) and test the same amount of work, it goes without saying that different results will be obtained in each case. It's too late.

Next, the load torque T to be applied to the coreless motor 10 by the variable load 33 of the generator 32 is increased. The flow rate of the refrigerant liquid (pure water) 80 is adjusted by the refrigerant liquid flow variable device 26 disposed in association with the control unit or the control device 20 (hereinafter referred to as “control device 20”) so as to match the setting of the load torque T. Adjustment is performed by varying the drive voltage of the liquid supply pump 22. The allowable upper limit temperature of the cylindrical coil 100 used in the coreless motor 10 is 130 ° C. Therefore, the adjustment does not exceed t _M = 130 ° C. and does not fall below the lower limit temperature t _{N at} which the refrigerant liquid (pure water) vaporizes, and the maximum temperature t _c1 of the cylindrical coil at control and the cylinder at control operating so as to narrow the temperature difference _delta t of the minimum temperature t _c2 of the coil was measured flow rate of the load torque T and refrigerant liquid (pure water) 80 at that time.

FIG. 10 increases the load of the coreless motor (CP 50) 10 with the variable load 33 of the generator 32 via the torque sensor 34 shown in FIG. 7, and does not exceed the allowable upper limit temperature t _M = 130 ° C. in a state in which not less than the minimum temperature t _N of vaporization of refrigerant liquid (pure water), operated so as to narrow the temperature difference _delta t of the minimum temperature t _c2 of the cylindrical coil during control the maximum temperature t _c1 of the cylindrical coil during control Is a control flow for

As apparent from FIG. 10, when the refrigerant temperature is supplied at a temperature t exceeding the temperature t _L1 = 123 ° C. of the cylindrical coil 100 by reading the coil temperature detection sensor 21 (first reading), the refrigerant liquid supply pump 22 will be run. Further, the coil temperature detection sensor 21 is read (second read), and the cylindrical coil 100 that generates heat due to evaporation latent heat is cooled, and the temperature t is t _L2 = 122 ° C., and the supply of the refrigerant liquid is stopped at a temperature t below this. The refrigerant liquid supply pump 22 is stopped. Meanwhile, when the temperature t of the cylindrical coil does not reach these set temperatures, the first reading of the coil temperature detection sensor 21 and the second reading are repeated.

Thus, the voltage applied to the driving device 30 of the coreless motor 10 to measure the maximum torque T _M when set to 24V, to measure the flow rate L _M per minute of the refrigerant liquid (pure water) 80 at that time . The operating conditions of the refrigerant liquid supply pump 22 are as follows.
(1) Cooling start temperature t _L1 = 123 ° C. (first read)
(2) Cooling stop temperature t _L2 = 122 ° C. (second reading)
When the refrigerant liquid supply pump 22 was switched by reading (1) and (2) and the coreless motor 10 was operated, the torque T _{M was} 0.42 Nm, and the flow rate L _M was 1.141 ml / min.

The technical basis for setting the maximum torque T _M and the maximum flow rate L _M is that the flow rate of the refrigerant liquid 80 also increases when the torque T operates above 0.42 Nm. However, it was confirmed that the refrigerant liquid 80 was not vaporized by the cylindrical coil 100 and was discharged in the form of a mist (liquid phase) to the outside of the coreless motor 10 as the refrigerant liquid 80 increased. Therefore, the torque T _M = _0, 42 Nm is a limit torque that allows the coreless motor 10 to be operated continuously with a load exceeding the rated torque T ₀ = 0.28 Nm.

FIG. 9 shows a torque which can be continuously operated without the cylindrical coil 100 exceeding the allowable limit temperature t _M = 130 ° C. without supplying the pure water 80 which is the refrigerant liquid to the cylindrical coil 100. When the coreless motor 10 is operated continuously with a load torque T ₀ = 0.28 Nm, the temperature of the cylindrical coil 100 reaches 100 ° C. in 50 seconds and 120 ° C. in 300 seconds (5 minutes), as is clear from FIG. Over. The temperature reaches 127 ° C. in 720 seconds (12 minutes), and then the temperature is equilibrated at the allowable upper limit temperature t _M = 130 ° C. or less. 9, In short, indicates that continuous operation can be rated torque when the refrigerant liquid is not supplied is T _{0 =} 0.28 nm.

Next, to impart the load torque T that exceeds the rated torque T ₀ to the coreless motor 10 when the voltage applied to the driving device 30 is set to 24V. Then, as is clear from FIG. 12, the current increases in proportion to the increase of the load torque T, and the heat generation of the cylindrical coil 100 accompanying it increases the supply amount of the refrigerant liquid (pure water) 80. From this, as a result of the drive system 1 being properly controlled, it can be confirmed that continuous operation in an overload state is possible.

Specifically, the load torque T for continuously operating the coreless motor 10 at a load exceeding the rated torque T ₀ is T ₁ = 0.33 Nm, T ₂ = 0.36 Nm, T ₃ = 0.39 Nm, T ₄ = T _M Operate the coreless motor 10 for the 5 cases set to return to T ₄ = 0.42 Nm again after setting T ₄ = 0.42 Nm to T ₁ = 0.33 Nm and setting it to 0.42 Nm and setting T _{4 to} 0.42 Nm again. The

In the coreless motor 10, the control device 20 supplies the refrigerant liquid at a temperature t exceeding the cooling start temperature t _L1 = 123 ° C. (first reading), and the cooling stop temperature t _L2 = 122 ° C. (second reading) Then, the refrigerant liquid supply pump 22 is switched to stop the supply of the refrigerant liquid at a temperature t below this, and the refrigerant liquid (pure water) is vaporized without exceeding the allowable upper limit temperature t _M of the cylindrical coil 100 = 130 ° C. in a state in which not less than the minimum temperature t _N, by controlling so as to narrow the temperature difference _delta t of the minimum temperature t _c2 of the cylindrical coil during control the maximum temperature t _c1 of the cylindrical coil during control, the rated torque T ₀ It was confirmed that normal continuous operation was possible at any set torque that exceeded.

The operating condition of the refrigerant liquid supply pump 22 was a cooling start (first reading) temperature t _L1 = 123 ° C. This is a set value that secures the temperature rise due to the overshoot at the start of cooling and does not exceed the allowable upper limit temperature t _M = 130 ° C. of the cylindrical coil 100. Further, the cooling stop (second reading) temperature t _{L2 was set to} 122 ° C. This secures the temperature drop due to the overshoot at the time of cooling stop, and further prevents the malfunction due to the external noise etc. by setting the hysteresis with the cooling start (first reading) temperature t _L1 = 123 ° C to 1 ° C. It is a setting value to operate stably. Narrowing the temperature difference _delta t of the minimum temperature t _c2 of the cylindrical coil during control the maximum temperature t _c1 of the cylindrical coil when controlled by the operating conditions, the electrical resistance of alleviating cylindrical coil stress on the cylindrical coil due to thermal shock It is possible to narrow the change.

  Hereinafter, results obtained by changing the load torque T under the same equipment and under the same control conditions will be described. The respective results are shown in FIGS. 13-17.

FIG. 13 shows the result of a drive test of the coreless motor 10 in which the load torque T ₁ is set to 0.33 Nm by the variable load 33 of the generator 32. As is clear from FIG. 13 (a), the running test of the coreless motor 10, the torque _{T 1} is maintained to 0.33 nm, the refrigerant liquid supply pump 22 on / off the cylindrical coil 100 fixed by a pulse operation of the The coreless motor 10 is operated to maintain the temperature range. More specifically, the temperature t of the cylindrical coil 100 exceeds the cooling start temperature (t _L1 = 123 ° C.) about 100 seconds after the start of the coreless motor 10. At this time, the refrigerant liquid (pure water) 80 is directly supplied to the cylindrical coil via the slit penetrating the inner yoke. Next, when the cylindrical coil 100 is cooled by the latent heat of vaporization and falls below the cooling stop temperature (t _L2 = 122 ° C.), the supply of the refrigerant liquid (pure water) 80 is stopped. By repeating these pulse operations, the temperature t of the cylindrical coil changes in the range of 111 ° C. to 125 ° C. which is a constant temperature range. FIG. 13 (a) is an excerpt from 720 seconds (12 minutes) from the start of start of the coreless motor 10 in the continuous operation test, and it has been confirmed that substantially the same transition occurs after 720 seconds (12 minutes). is there.

FIG. 13B is an enlarged view of a temperature waveform of the cylindrical coil 100 for three minutes from 180 seconds (3 minutes) to 360 seconds (6 minutes) from the start of the cooling after the start of cooling. The state of rapid cooling is easily determined from the figure. The first reading temperature t _L1 is 123 ° C., and when the coolant liquid 80 is supplied at a temperature t exceeding this to start cooling, the temperature after rising due to the overshoot is within 2 ° C. and is reversed immediately thereafter. The second read temperature t _L2 after inversion is 122 ° C. Even if the supply of the refrigerant liquid 80 is stopped at a temperature t below this, the temperature after falling due to overshoot decreases by about 11 to 7 ° C. Specifically, the load up to a temperature _t c1 = 125 ° C. of the torque _T 1 = cylindrical coil during set control of the 0.33 nm, the minimum temperature _t c2 = 111 ° C., the _Δ t = 14 _℃. Accordingly, the maximum temperature t of the cylindrical coil at the time of control of the cylindrical coil 100 in a state where the allowable upper limit temperature t _M of the cylindrical coil 100 does not exceed 130 ° C. and the lower limit temperature t _N of vaporization of the refrigerant liquid (pure water) is not exceeded. by controlling so as to narrow the difference _delta t of _c1 and the minimum temperature t _c2, it was confirmed that it enables normal continuous operation.

FIG. 14 shows the result of a drive test of the coreless motor 10 in which the load torque T ₂ is set to 0.36 Nm by the variable load 33 of the generator 32. As is clear from FIG. 14 (a), the running test of the coreless motor 10, the torque _{T 1} is maintained to 0.36 nm, the refrigerant liquid supply pump 22 on / off the cylindrical coil 100 fixed by a pulse operation of the The coreless motor 10 is operated to maintain the temperature range. The temperature t of the cylindrical coil 100 exceeds the cooling start temperature (t _L1 = 123 ° C.) about 90 seconds after the start of the coreless motor 10. At this time, the refrigerant liquid (pure water) 80 is directly supplied to the cylindrical coil. Next, when the cylindrical coil 100 is cooled by the latent heat of vaporization and falls below the cooling stop temperature (t _L2 = 122 ° C.), the supply of the refrigerant liquid (pure water) 80 is stopped. By repeating these pulse operations, the temperature t of the cylindrical coil changes in the range of 113 ° C. to 128 ° C., which is a constant temperature range. FIG. 14 (a) is an excerpt from 720 seconds (12 minutes) from the start of the start of the coreless motor 10 in the continuous operation test, and it has been confirmed that almost the same transition occurs after 720 seconds (12 minutes). is there.

Running test of the coreless motor 10, the total pump operating time of the cooling fluid supply start from 10 minutes, when the torque T ₁ but was 56 seconds, in the case of the torque T ₂ is 85.5 seconds. Supply amount in between of the refrigerant liquid also in the case of the torque _{T 1} at 5.53ml case of torque _{T 2} to a 3.62 ml, 1.5 times that of the torque _{T 1} (FIG. 11, FIG. 12 ).

FIG. 14B is an enlarged view of a temperature waveform of the cylindrical coil 100 for three minutes from 180 seconds (3 minutes) to 360 seconds (6 minutes) from the start of the cooling after the start of cooling. The state of rapid cooling is easily determined from the figure. The first reading temperature t _L1 is 123 ° C. When the coolant liquid 80 is supplied at a temperature t exceeding it to start cooling, the temperature rise due to the overshoot reverses at about 5 ° C. The second read temperature t _L2 after inversion is 122 ° C. Even if the supply of the refrigerant liquid 80 is stopped at a temperature t below this, the temperature after falling due to overshoot decreases by about 9 to 5 ° C. Specifically, the load up to a temperature _t c1 = 128 ° C. of the torque _T 2 = cylindrical coil during set control of the 0.36 nm, the minimum temperature _t c2 = 113 ° C., the _Δ t = 15 _℃. The pulse interval is shorter than when the torque T ₁ = 0.33 Nm. Also in this case, the cylinder coil 100 does not exceed the allowable upper limit temperature t _M = 130 ° C. of the cylindrical coil 100 and does not fall below the lower limit temperature t _{N at} which the refrigerant liquid (pure water) evaporates. by controlling so as to narrow the difference _delta t of the maximum temperature t _c1 and the minimum temperature t _c2, it was confirmed that it enables normal continuous operation.

FIG. 15 shows the results of a drive test of the coreless motor 10 in which the load torque T ₃ is set to 0.39 Nm with the variable load 33 of the generator 32. As is clear from FIG. 15 (a), the running test of the coreless motor 10, the torque _{T 1} is maintained to 0.39 nm, the refrigerant liquid supply pump 22 on / off the cylindrical coil 100 fixed by a pulse operation of the The coreless motor 10 is operated to maintain the temperature range. The temperature t of the cylindrical coil 100 exceeds the cooling start temperature (t _L1 = 123 ° C.) about 50 seconds after the start of the coreless motor 10. At this time, the refrigerant liquid (pure water) 80 is directly supplied to the cylindrical coil. Next, when the cylindrical coil 100 is cooled by the latent heat of vaporization and falls below the cooling stop temperature (t _L2 = 122 ° C.), the supply of the refrigerant liquid (pure water) 80 is stopped. By repeating these pulse operations, the temperature t of the cylindrical coil changes in the range of 109 ° C. to 128 ° C. which is a constant temperature range. FIG. 15 (a) is an excerpt from 720 seconds (12 minutes) from the start of start of the coreless motor 10 in the continuous operation test, and it has been confirmed that almost the same transition occurs after 720 seconds (12 minutes). is there.

Running test of the coreless motor 10, the total pump operating time of the cooling fluid supply start from 10 minutes, when the torque T ₁ but was 56 seconds, in the case of the torque T ₃ is 128 seconds. Supply amount in between of the refrigerant liquid in 8.28ml case of the torque _{T 3} and is compared to 3.62ml case of the torque _{T 1,} which is 2.3 times that of the torque _{T 1} (FIG. 11, FIG. 12).

FIG. 15B is an enlarged view of a temperature waveform of the cylindrical coil 100 for three minutes from 180 seconds (3 minutes) to 360 seconds (6 minutes) from the start of the cooling after the start of cooling. The state of rapid cooling is easily determined from the figure. The first reading temperature t _L1 is 123 ° C. When the coolant liquid 80 is supplied at a temperature t exceeding it to start cooling, the temperature rise due to the overshoot reverses at about 5 ° C. The second read temperature t _L2 after inversion is 122 ° C. Even if the supply of the refrigerant liquid 80 is stopped at a temperature t below this, the temperature after falling due to overshoot decreases by about 13 to 5 ° C. Specifically, the load torque _T 3 = maximum temperature _t c1 = 128 ° C. of the cylindrical coil during set control of the 0.39 nm, the minimum temperature _t c2 = 109 ° C., the _Δ t = 19 _℃. The pulse interval is further shortened as compared with the case of torque T ₂ = 0.36 Nm. Also in this case, the cylinder coil 100 does not exceed the allowable upper limit temperature t _M = 130 ° C. of the cylindrical coil 100 and does not fall below the lower limit temperature t _{N at} which the refrigerant liquid (pure water) evaporates. by controlling so as to narrow the difference _delta t of the maximum temperature t _c1 and the minimum temperature t _c2, it was confirmed that it enables normal continuous operation.

FIG. 16 shows the results of a drive test of the coreless motor 10 in which the load torque T ₄ is set to 0.42 Nm with the variable load 33 of the generator 32. As it is clear from FIG. 16 (a), the running test of the coreless motor 10, the torque _{T 1} is constant temperature region a cylindrical coil 100 by on / off pulsing of the coolant fluid supply pump 22 maintained at 0.42Nm The coreless motor 10 is operated to maintain the The temperature t of the cylindrical coil 100 exceeds the cooling start temperature (t _L1 = 123 ° C.) about 40 seconds after the start of the coreless motor 10. At this time, the refrigerant liquid (pure water) 80 is directly supplied to the cylindrical coil. Next, when the cylindrical coil 100 is cooled by the latent heat of vaporization and falls below the cooling stop temperature (t _L2 = 122 ° C.), the supply of the refrigerant liquid (pure water) 80 is stopped. By repeating these pulse operations, the temperature t of the cylindrical coil changes in the range of 107 ° C. to 127 ° C., which is a constant temperature range. FIG. 16 (a) is an excerpt from 720 seconds (12 minutes) from the start of start of the coreless motor 10 in the continuous operation test, and it has been confirmed that almost the same transition occurs after 720 seconds (12 minutes). is there.

Running test of the coreless motor 10, the total pump operating time of the cooling fluid supply start from 10 minutes, when the torque T ₁ but was 56 seconds, in the case of the torque T ₄ is 176.5 seconds. Supply amount in between of the refrigerant liquid in 11.41ml cases when torque _{T 4} a is compared to 3.62ml torque _{T 1,} which is 3.2 times that of the torque _{T 1} (FIG. 11, FIG. 12).

FIG. 16B is an enlarged view of the temperature waveform of the cylindrical coil 100 for three minutes from 180 seconds (3 minutes) to 360 seconds (6 minutes) from the start of the cooling after the start of cooling. The state of rapid cooling is easily determined from the figure. The first reading temperature t _L1 is 123 ° C. When the coolant liquid 80 is supplied at a temperature t exceeding it to start cooling, the temperature rise due to the overshoot reverses at about 4 ° C. The second read temperature t _L2 after inversion is 122 ° C. Even if the supply of the refrigerant liquid 80 is stopped at a temperature t below this, the temperature after falling due to overshoot decreases by about 15 to 7 ° C. Specifically, the load torque _T 4 = maximum temperature _t c1 = 127 ° C. of the cylindrical coil during set control of the 0.42 nm, the minimum temperature _t c2 = 107 ° C., the _Δ t = 20 _℃. The pulse interval is further shortened as compared with the torque T ₃ = 0.39 Nm. Also in this case, the cylinder coil 100 does not exceed the allowable upper limit temperature t _M = 130 ° C. of the cylindrical coil 100 and does not fall below the lower limit temperature t _{N at} which the refrigerant liquid (pure water) evaporates. by controlling so as to narrow the difference _delta t of the maximum temperature t _c1 and the minimum temperature t _c2, it was confirmed that it enables normal continuous operation.

As is clear from FIGS. 13 to 16, the cylinder without a load torque T _{1 to} T ₄ (0.33 to 0.42 Nm) exceeding the rated torque T ₀ = 0.28 Nm is continuously applied to the coreless motor 10. The temperature of the coil 100 was controlled to confirm that continuous operation of the coreless motor 10 was possible. From this test result, in any case of T _{1 to} T ₄ , the coreless motor 10 vaporizes the refrigerant liquid (pure water) 80 to which the cylindrical coil 100 is supplied, and the latent heat of its vaporization makes the allowable upper limit of the cylindrical coil 100 without exceeding the temperature _{t M,} in a state in which not less than the minimum temperature _{t N} of vaporization of refrigerant liquid (pure water), so as to narrow the difference _delta t of the maximum temperature _{t c1} and the minimum temperature _{t c2} cylindrical coil 100, a cylindrical coil By controlling the temperature of 100, it was confirmed that normal continuous operation is possible.

The coreless motor 10 in an overload state in four cases adjusts the supply amount of the refrigerant liquid (pure water) 80 to the cylindrical coil 100 to obtain the maximum temperature t _c1 = 125 ° C., the minimum temperature t _c2 = 111 ° C., _Δ t = 14 ° C. (T ₁ ), maximum temperature t _c1 = 128 ° C., minimum temperature t _c2 = 113 ° C., _Δ t = 15 ° C. (T ₂ ), maximum temperature t _c1 = 128 ° C., minimum temperature t _c2 = 109 ° C. _{, Δ t = 19 ℃ (T} 3), the maximum temperature _t c1 = 127 ℃, the minimum temperature _t c2 = 107 ℃, such as the _{Δ t = 20 ℃ (T 4} ), complete the appropriate temperature range cylindrical coil 100 It was verified that continuous operation was possible in the control state.

A further drive test was conducted to reinforce the verification by the drive test of the coreless motor 10 in an overload state in the four cases. It sets the load torque set by the variable load 33 of the generator 32 to T ₁ = 0.33 Nm and drives for 300 seconds (5 minutes) from the start of the coreless motor 10 for the next 300 seconds to 600 seconds ( Further, the coreless motor 10 is driven with the load torque set to T ₄ = 0.42 Nm between 5 minutes), and the load torque is set to T ₁ = 0.4 between the next 600 seconds and 720 seconds (2 minutes more). This is a test in which the coreless motor 10 is driven with resetting to 33 Nm.

Figure 17 is a coreless motor 10, a 5-minute torque _{T 1,} 5 minute torque _{T 4,} further again the torque _{T 1} in 2 minutes, continuously driven by test results. As apparent from FIG. 17A, during the operation test of the coreless motor 10, the load torque is set to T ₁ = 0.33 Nm and the coreless motor 10 is driven for 300 seconds (five minutes) after the start, and the next The temperature t of the cylindrical coil is set by repeating the on / off pulse operation of the refrigerant liquid supply pump 22 even under conditions where the load torque is set to T ₄ = 0.42 Nm for 300 seconds to 600 seconds (5 minutes further). The temperature shifts from 109 ° C. to 126 ° C., which is a constant temperature range. FIG. 17 (a) is an excerpt from 720 seconds (12 minutes) from the start of start of the coreless motor 10 in the continuous operation test, and the transition is almost the same even with the same load fluctuation even after 720 seconds (12 minutes). It is confirmed to do.

The operating condition of the refrigerant liquid supply pump 22 is when the cooling start (first reading) temperature t _L1 = 123 ° C., as in the case described above. At this time, the refrigerant liquid (pure water) 80 is directly supplied to the cylindrical coil. Next, when the cylindrical coil 100 is cooled by the latent heat of vaporization and falls below the cooling stop (second reading) temperature t _L2 = 122 ° C., the supply of the refrigerant liquid (pure water) 80 is stopped.

FIG. 17B is a detail of the portion in which the load torque is instantaneously changed from T ₁ = 0.33 Nm to T ₄ = 0.42 Nm. Specifically, it is an enlarged view of the temperature waveform of the cylindrical coil 100 for 4 minutes from 180 seconds (3 minutes) to 420 seconds (7 minutes) from the start time. More particularly, the load torque _{T 1} of the 300 seconds 180 seconds (3 minutes) (5 min) since it is 0.33 nm, rapid cooling and slow temperature rise is easily determined from FIG. The first reading temperature t _L1 is 123 ° C. When the coolant liquid 80 is supplied at a temperature t exceeding it to start cooling, the temperature rise reverses within about 1 ° C. The second read temperature t _L2 after inversion is 122 ° C. Even if the supply of the refrigerant liquid 80 is stopped at a temperature t below this, the temperature after falling due to overshoot decreases by about 11 to 7 ° C. Specifically, the maximum temperature t _c1 = 124 ° C., the minimum temperature t of the cylindrical coil for 2 minutes from 180 seconds (3 minutes) to 300 seconds (5 minutes) from the start time set to the load torque T ₁ = 0.33 Nm _{c2 = 111 ℃, Δ t =} 13 ℃ , and the maximum temperature _t c1 = 125 ° C. is the result of FIG. 13, the minimum temperature _t c2 = 111 ° C., substantially coincides with _Δ t = 14 _℃.

Since 300 seconds (5 minutes) the load torque _{T 4} between 420 seconds (7 minutes) is a 0.42 nm, surged rapid cooling temperature is readily determined from FIG. The first reading temperature t _L1 is 123 ° C. When the refrigerant liquid 80 is supplied at a temperature t exceeding it to start cooling, the temperature rise reverses at about 4 ° C. The second read temperature t _L2 after inversion is 122 ° C. Even if the supply of the refrigerant liquid 80 is stopped at a temperature t below this, the temperature after falling due to overshoot decreases to about 13 to 10 ° C. Specifically, maximum temperature t _c1 = 126 ° C., minimum temperature t _c2 of cylindrical coil for 2 minutes between 300 seconds (5 minutes) and 420 seconds (7 minutes) set to load torque T ₄ = 0.42 Nm _{= 109 ℃, Δ t = 17} ℃ , and the maximum temperature _t c1 = 127 ° C. is the result of FIG. 16, the minimum temperature _t c2 = 108 ° C., substantially coincides with _Δ t = 19 _℃. As a result, it was confirmed that the coreless motor 10 was correctly operated and the continuous operation was possible even in the load fluctuation whose upper limit is 0.42 Nm.

FIG. 18 shows experimental results when the cooling start temperature t _L1 and the cooling stop temperature t _L2 of the cylindrical coil 100 are changed under the same conditions as the load torque shown in FIG. Start the coreless motor 10, a cylindrical coil 100 is set when the _t L1 = 110 ° C. in the cooling start temperature, further sets the time _t L2 = 90 ° C. in the cooling stop temperature, 5 minute torque _{T 1,} torque T ₄ 5 minutes, 2 minutes the torque T ₁ again, a test result was driven continuously coreless motor 10. Even when the set values of the cooling start temperature t _L1 and the cooling stop temperature t _L2 were changed, it was possible to confirm that the drive system 1 operated normally.

  The above driving test was conducted using pure water of 2257 kJ / kg of heat of vaporization described in the table of FIG. 19 for the refrigerant liquid. FIG. 19 is a list of the melting point ° C, the boiling point ° C, and the heat of vaporization kJ / kg of the refrigerant liquid containing pure water 80. Therefore, coreless motor 10 with a load torque T of 0.317 Nm using a fluorine-based liquid with a melting point of -123 ° C., a boiling point of 34 ° C., and a vaporization heat of 142 kJ / kg as the refrigerant liquid 80 with and without refrigerant Drive test was conducted.

In FIG. 20, a fluorine-based refrigerant is used as the refrigerant liquid 80, and the operation conditions of the refrigerant liquid supply pump 22 are as follows: cooling start temperature t _L1 = 54 ° C. (first read) and cooling stop temperature t _L2 = 52 ° C. (second read Represents the transition of the temperature t of the cylindrical coil 100 in the driving test when driven and supplied while supplying the cylindrical coil 100). According to this driving test, in the coreless motor 10 that is operated, when the fluorine-based refrigerant liquid 80 is supplied, the cylindrical coil 100 can be transitioned between 50 ° C. and 60 ° C., while the fluorine-based refrigerant liquid 80 is Was not supplied, it was confirmed that the cylindrical coil 100 exceeded 130 ° C. in about 10 minutes.

  The result of the driving test is that the control device 20 properly controls the cooling operation on the cylindrical coil 100 by the latent heat of vaporization supplied to the cylindrical coil 100 and the vaporization latent heat vaporized by the cylindrical coil 100 even if the fluorinated refrigerant liquid 80 is used. Revealed. It also verifies that continuous operation of the coreless motor 10 is possible if the cooling operation for the cylindrical coil 100 can be properly controlled in the coreless motor 10 using another refrigerant liquid 80 other than pure water. It was possible to confirm that it is possible to change the temperature control area of the coil by changing it.

  As apparent from the present drive test using the coreless motor 10 of FIG. 8, the present invention relates to an ironless core rotating electrical machine continuously operating with a load exceeding the rated load, a drive method thereof, and a drive system including the same. It has at least the following configuration.

  The ironless core rotating electrical machine is typically a rotor having a plurality of magnets disposed on the inner circumferential surface of a cylindrical mount, or a cup-shaped mount in which a concentric inner yoke and an outer yoke are integrated at the bottom. A rotor having a plurality of magnets circumferentially spaced from each other on the outer peripheral surface of the inner yoke and / or the inner peripheral surface of the outer yoke, and having slits penetrating the inner yoke at the position of the inner yoke corresponding to the gaps. The stator, one of which is one of the constituent requirements and the other constituent requirement corresponding to the rotor, has a cylindrical coil of iron-free core that can be energized, and one end face of the cylindrical coil is fixed. And a lid type mount.

  Further, as apparent from FIGS. 1 and 2 and FIGS. 3 and 4, a path for supplying the refrigerant liquid to the space formed by the inside of the cylindrical coil fixed to the stator and the rotor and the center of the stator is provided. By driving the control unit or the control unit when driven by the drive unit or the drive unit, and appropriately detecting the temperature of the cylindrical coil generating heat, the inner circumferential surface of the cylindrical coil via the path is provided. It has the structure which adjusts the supply amount of the refrigerant | coolant liquid directly sent. This is easily understood from FIGS. 5 and 6 representing the drive system.

  The ironless core rotating electrical machine of the present invention, the drive method thereof, and the drive system including the same are applicable to various load conditions exceeding the rating, the variable in the generator 32 of FIG. 7 which is a drive test schematic diagram. It can be easily estimated from the load 33. Moreover, it is needless to say that the size is not limited as long as it has the same configuration as the coreless motor used in the drive test.

  In the iron-free rotary electric machine of FIG. 21 illustrated as a reference drawing, the configuration for supplying the refrigerant liquid is such that the position where the refrigerant liquid is supplied shown in FIGS. 3 and 4 is not the first gap but the second gap. It is an embodiment located. Also in this embodiment, the refrigerant liquid sent to the second gap reaches the cylindrical coil that generates heat, and the refrigerant liquid is vaporized there, and the latent heat of vaporization can sufficiently cool the cylindrical coil, thereby causing the load to exceed the rating. I think that it can be an iron-free core rotary electric machine to operate. However, a drive test of a coreless motor based on this configuration has not been conducted.

While the present invention has been described in connection with the preferred embodiments, various changes may be made by those skilled in the art without departing from the scope of the present invention, and equivalents may be substituted for elements thereof. Will be understood. Accordingly, it is not intended to be limited to the particular embodiments disclosed as best embodiments contemplated for carrying out the present invention, but it is intended to include all embodiments which fall within the scope of the appended claims.

1 Drive system 2 Stator
3 Rotor
DESCRIPTION OF SYMBOLS 4 Magnet 8 Route 10 which supplies a refrigerant liquid No iron core rotary electric machine or coreless motor 20 Control part or control apparatus 21 Coil temperature detection sensor 22 Pump 23 Controller 24 Solenoid valve 25 Temperature and voltage recording device 26 Refrigerant liquid flow variable device

30 Drive Unit or Drive Device 31 Power Meter 32 Generator 33 Variable Load 34 Torque Sensor 35 Torque Meter

40 Air gap including air gap or first air gap 41 Space between magnets 50 Second air gap 60 Third air gap

80 Refrigerant liquid or liquid phase 800 Refrigerant liquid vapor phase 81 Refrigerant liquid container 82 Circulating means or circulating transport pipe

100 cylindrical coil 101 one end face 102 of the cylindrical coil the other end face 110 of the cylindrical coil 110 inner circumferential side of the cylindrical coil 120 outer circumferential side of the cylindrical coil

200 central part of lid type mount 240 lid type mount which constitutes stator 2

300 Cylindrical mount 310 constituting rotor 3 Inner circumferential surface 340 of cylindrical mount 340 Central part of cylindrical mount

400 cup type mount 401 constituting the rotor 3 one end face 410 of the cup type mount bottom portion 420 of the cup type mount inner yoke 421 constituting the cup type mount inner side 422 of the inner yoke 420 outer circumferential surface 423 of the inner yoke 420 penetrating the inner yoke 420 Slit 430 Outer yoke 431 constituting the cup type mount 400 Outer peripheral surface of outer yoke

1000 drive shaft

Claims (30)

A stator including a coil of ironless iron-free core and a lid type mount fixing one end face of the cylinder coil , and a rotor including a cup type mount rotatably opposed to the lid type mount ;
An air gap is formed between the lid mount and the cup mount;
The cup type mount includes a magnet, and the outer peripheral surface and / or the inner peripheral surface of the magnet face the inner peripheral surface and / or the outer peripheral surface of the cylindrical coil at the air gap,
The lid mount includes a path for supplying a refrigerant liquid to the air gap ,
A control unit for controlling the supply of the refrigerant liquid, and a drive unit for driving the rotor are provided, which are iron-free rotary electric machines for continuous operation with a load exceeding the rating when not cooled ,
The controller operates the drive unit and operates continuously with a load exceeding the rating when not cooling , operates the control unit, supplies the refrigerant liquid to the air gap , and generates the refrigerant liquid supplied. The cylindrical coil is vaporized, the latent heat of vaporization of the refrigerant liquid cools the cylindrical coil, and the operation of supplying the refrigerant liquid so that the cylindrical coil does not exceed the allowable upper limit temperature during rated operation; The supply of the refrigerant liquid is repeated by repeating the operation of stopping the supply of the refrigerant liquid so that the coil does not lower at least the lower limit temperature at which the refrigerant liquid is vaporized, and the cylindrical coil is adjusted to the allowable upper limit temperature and the allowable upper limit temperature. An iron-free core rotary electric machine characterized in that it is maintained in a range with a lower limit temperature and continuously operated with a load exceeding the rating when not cooled . The ironless core rotary electric machine according to claim 1, wherein the refrigerant liquid is water, the lower limit temperature is 100 ° C, and the allowable upper limit temperature is 125 ° C. The control unit controls a coil temperature detection sensor for detecting a temperature of the cylindrical coil, a pump for supplying the refrigerant liquid to the air gap , and an on / off command to the pump in conjunction with the coil temperature detection sensor. No core dynamoelectric machine according to any of claims 1 or 2, characterized in that it comprises a controller for adjusting the supply of the refrigerant liquid by. No core dynamoelectric machine according to any of claims 1 3, characterized in Rukoto is coolant liquid container further deployment communicating with said path. A refrigerant liquid container in communication with the path is further provided;
The control unit includes a coil temperature detection sensor that detects a temperature of the cylindrical coil, and a solenoid valve for supplying the refrigerant liquid to the air gap from the refrigerant liquid container disposed at a position higher than the cylindrical coil. the coil temperature sensor and the interlocking to claim 1 or 2 have been no core dynamoelectric machine according to any one characterized in that it comprises a controller for adjusting the supply of the refrigerant liquid by the switching command for said solenoid valves . The lid type mount, no core dynamoelectric machine according to any of claims 4 or 5, characterized in that it further comprises a circulation means for communicating between said air gap and said coolant liquid container. 7. The iron-free rotary electric machine according to claim 6 , wherein the control unit recovers the vapor phase of the refrigerant liquid in the refrigerant liquid container in the liquid phase by the circulating unit. The rotor according to any one of claims 1 to 7 , further comprising a drive shaft fixed to a central portion of the cup-shaped mount and rotatably coupled to the central portion of the lid-shaped mount. Iron-free core rotating electrical machine. The ironless core rotation according to any one of claims 1 to 8 , wherein the cylindrical coil is formed in a cylindrical shape by a laminate of conductive metal sheets having axially spaced linear portions covered with an insulating layer. Electrical machine. The ironless core rotary electric machine according to any one of claims 1 to 8 , wherein the cylindrical coil is formed in a cylindrical shape by a linear conductor covered with an insulating layer. A stator including a coil of ironless iron-free core and a lid type mount fixing one end face of the cylinder coil , and a rotor including a cup type mount rotatably opposed to the lid type mount ;
An air gap is formed between the lid mount and the cup mount;
The cup type mount includes a magnet, and the outer peripheral surface and / or the inner peripheral surface of the magnet face the inner peripheral surface and / or the outer peripheral surface of the cylindrical coil at the air gap,
The lid mount includes a path for supplying a refrigerant liquid to the air gap ,
A control method for controlling the supply of the refrigerant liquid, and a drive unit for driving the rotor are provided, which is a driving method of an iron-free rotating electrical machine for continuous operation with a load exceeding a rating when not cooling. ,
Operating the ironless core rotary electric machine continuously with a load exceeding the rating when operating the drive unit and not cooling it;
The control unit is operated to supply the refrigerant liquid to the air gap, and the cylindrical coil that generates the refrigerant liquid is vaporized, and the cylindrical coil is cooled by the latent heat of evaporation of the refrigerant liquid, and the cylinder An operation of supplying the refrigerant liquid so that the coil does not exceed the allowable upper limit temperature during rated operation, and a supply of the refrigerant liquid so as not to fall below a lower limit temperature at which the cylindrical coil vaporizes the refrigerant liquid at least by the operation. Adjusting the supply of the refrigerant liquid by repeating the stopping operation, and maintaining the cylindrical coil in the range of the allowable upper limit temperature and the lower limit temperature ;
A driving method comprising: The driving method according to claim 11, wherein the refrigerant liquid is water, the lower limit temperature is 100 ° C, and the allowable upper limit temperature is 125 ° C. The control unit includes a coil temperature detection sensor, a pump for supplying the refrigerant liquid to the air gap, and a controller for adjusting the supply of the refrigerant liquid according to an on / off command to the pump.
Further comprising the step of detecting the temperature of the cylindrical coil by actuating the coil temperature sensor,
In the step of maintaining the cylindrical coil in the range between the allowable upper limit temperature and the lower limit temperature, adjusting the supply of the refrigerant liquid may cause the controller to turn on the pump based on the detected temperature of the cylindrical coil. The driving method according to any one of claims 11 and 12 , further comprising: performing an off command . No core rotating electric machine, has been the driving method according to claim 11 13, characterized in Rukoto is coolant liquid container further deployment communicating with said path. The iron-free core rotary electric machine is further provided with a refrigerant liquid container communicating with the path,
The control unit includes a coil temperature detection sensor that detects a temperature of the cylindrical coil, and a solenoid valve for supplying the refrigerant liquid to the air gap from the refrigerant liquid container disposed at a position higher than the cylindrical coil. And a controller that adjusts the supply of the refrigerant liquid according to an open / close command to the solenoid valve in conjunction with the coil temperature detection sensor ,
Operating the coil temperature detection sensor to detect the temperature of the cylindrical coil ;
In adjusting the supply of the refrigerant liquid in the step of maintaining the cylindrical coil in the range between the allowable upper limit temperature and the lower limit temperature, the controller controls the solenoid valve based on the detected temperature of the cylindrical coil. 13. A drive method according to any of the claims 11 or 12 , comprising operating. The lid type mount, and the driving method according to any one of claims 14 or 15, characterized in that it further comprises a circulation means for communicating between said air gap and said coolant liquid container. 17. The driving method according to claim 16 , further comprising the step of the control unit operating the circulation means to recover the vapor phase of the refrigerant liquid in the refrigerant liquid container in the liquid phase. The rotor according to any one of claims 11 to 17 , further comprising a drive shaft fixed to a central portion of the cup-shaped mount and rotatably coupled to a central portion of the lid-shaped mount. Driving method. The driving method according to any one of claims 11 to 18 , wherein the cylindrical coil is formed in a cylindrical shape by a laminate of conductive metal sheets having longitudinally spaced linear portions covered with an insulating layer. The driving method according to any one of claims 11 to 18 , wherein the cylindrical coil is formed in a cylindrical shape by a linear conductor covered with an insulating layer. A stator including a coil of ironless iron-free core and a lid type mount fixing one end face of the cylinder coil , and a rotor including a cup type mount rotatably opposed to the lid type mount ;
An air gap is formed between the lid mount and the cup mount;
The cup type mount includes a magnet, and the outer peripheral surface and / or the inner peripheral surface of the magnet face the inner peripheral surface and / or the outer peripheral surface of the cylindrical coil at the air gap,
The lid mount includes a path for supplying a refrigerant liquid to the air gap ,
Comprising a non-core rotating electric machine, a driving device for driving the pre-Symbol rotary electric machine, and a control device for controlling the supply of the refrigerant liquid to the air gap in conjunction with the coil temperature sensor deployed in the stator A drive system for continuously operating a coreless rotary electric machine with a load exceeding the rating when not cooled ,
The controller is operated to continuously supply the refrigerant liquid to the air gap when the iron-free rotary electric machine is operated continuously with a load exceeding the rated load when the drive is operated and not cooled . The refrigerant liquid is vaporized, the cylindrical coil is cooled by the latent heat of vaporization of the refrigerant liquid, and the refrigerant liquid is supplied so that the cylindrical coil does not exceed the allowable upper limit temperature during rated operation; The supply of the refrigerant liquid is repeated by repeating the operation of stopping the supply of the refrigerant liquid so that the temperature does not fall below the lower limit temperature at which the cylinder coil vaporizes the refrigerant liquid, thereby adjusting the supply of the cylinder coil to the allowable upper limit temperature. A driving system characterized by maintaining the temperature within the range with the lower limit temperature and continuously operating with a load exceeding a rating when not cooling . The drive system according to claim 21, wherein the refrigerant liquid is water, the lower limit temperature is 100 ° C, and the allowable upper limit temperature is 125 ° C. The control device includes a pump that supplies the refrigerant liquid to the air gap , and a controller that adjusts the supply of the refrigerant liquid according to an on / off command to the pump.
Wherein the controller is either of claims 21 or 22, characterized in that to adjust the supply of the refrigerant liquid by the on-off command for said pump based on the detected temperature of the said cylindrical coil The drive system described in. The drive system according to any one of claims 21 to 23 , further comprising a refrigerant liquid container in communication with the path. Further including a refrigerant liquid container in communication with the path;
The control device includes an electromagnetic valve that supplies the refrigerant liquid to the air gap , and a controller that adjusts the supply amount of the refrigerant liquid according to an open / close command to the electromagnetic valve in conjunction with the coil temperature detection sensor .
The controller according to claim 21 or 22, characterized in that the controller adjusts the supply of the refrigerant liquid by operating the solenoid valve based on the detected temperature of the cylindrical coil . Drive system described in any . The drive system according to any of claims 24 or 25, characterized in that it comprises further a circulation means for communicating between said air gap and said coolant liquid container. 27. The drive system according to claim 26 , wherein the controller recovers the vapor phase of the refrigerant liquid in the refrigerant liquid container in the liquid phase by the circulating means. 28. The apparatus according to any one of claims 21 to 27 , wherein the rotor further comprises a drive shaft fixed to a central portion of the cylindrical mount and rotatably coupled to a central portion of the lid mount. Drive system. A drive system according to any of claims 21 to 28 , wherein said cylindrical coil is formed cylindrically of a stack of conductive metal sheets having longitudinally spaced linear portions covered by an insulating layer. The drive system according to any one of claims 21 to 28 , wherein the cylindrical coil is formed in a cylindrical shape by a linear conductor covered with an insulating layer.

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