JP2005224083A - Motor structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor structure that minimizes damages to a permanent magnet, by improving a cooling power of a motor structure, and permits rapid starting and acceleration, obtains generation of high torques, and drives at ordinary temperature by supplying high values of electric current. <P>SOLUTION: In a motor structure in which coils are wound on a coil bobbin, and the coil bobbin is housed within a case; the coil bobbin and the case are formed with thermal conductive non-magnetic materials. For instance, a rotor and a stator are housed within a case, and a refrigerant material is introduced so as to fill the interior of the case. For instance, a fin is provided to agitate the refrigerant material of the rotor. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a motor structure, and more particularly to a motor structure with excellent heat dissipation. This motor structure can be used, for example, in electric vehicles, airships, turbine engines, turbine generators, fuel cells, air conditioners, heat exchangers, and fluid sensors.

Since the electric motor has a magnetic circuit, the coil bobbin, the case and the like are made of a material having poor thermal conductivity such as ferrite and steel. In this motor, heat energy due to copper loss is trapped in the motor, reaching the thermal yield point of the permanent magnet, and the motor function may be impaired. Thus, there is a motor structure having a cooling function described in JP-A-9-154272. In order to provide a cooling structure for a linear motor that can improve the rated thrust of the motor and improve the positioning accuracy and straight running performance, the salient pole part on the mover side, and this A bobbin made of a non-magnetic metal such as aluminum having a higher thermal conductivity than the salient pole is interposed between the coil wound around the salient pole and the heat transferred from the coil to the bobbin is cooled in the cooling member. It is configured to escape to the outside through the coolant flowing through the service pipe.
JP-A-9-154272

  However, the conventional motor structure has a problem that the cooling performance is not sufficient. Therefore, the present invention improves the cooling capacity of the motor structure, thereby reducing the degree of damage to the permanent magnet, supplying a high value of current, enabling quick start and acceleration, obtaining high torque, An object of the present invention is to provide a motor structure that can be driven by a motor.

 In order to achieve the above object, the present invention provides a motor structure in which a coil is wound around a coil bobbin, and the coil bobbin and the case are made of a thermally conductive nonmagnetic material. And According to this structure, since the case is also formed of a nonmagnetic material having a low thermal conductivity such as an aluminum material, the degree to which the motor is cooled is further improved. Further, in the present invention, the rotor and the stator are accommodated in the case, and the refrigerant material is introduced so as to fill the inside of the case. Therefore, the bobbin around which the refrigerant material and the coil are wound is directly formed of the refrigerant material. To be cooled.

  Furthermore, the circulation efficiency of the refrigerant material is improved by providing the rotor with the fins for stirring the refrigerant material as in the present invention. Further, by providing a means for forcibly circulating the refrigerant material in the case, the circulation efficiency of the refrigerant material is improved. Since the coil bobbin is provided with a plurality of slits, an eddy current generated because the aluminum material is a conductive material is prevented, and an increase in rotor load is prevented. Similarly, an insulating material is provided between the coil bobbin and the case. Similarly, the coil bobbin is formed of a plurality of conductive layers with an insulating layer interposed therebetween.

  Examples of the refrigerant material include water, oil, and gas. The electric circuit of the rotor or stator is preferably molded with resin or the like so as not to directly touch these refrigerant materials. The motor according to the present invention is, for example, a first magnetic body, a second magnetic body, and the magnetic body, and is movable between the first and second magnetic bodies in a predetermined direction. A third magnetic body, and each of the first magnetic body and the second magnetic body has a configuration in which a plurality of excitable electromagnetic coils are arranged in order. The magnetic body has a configuration in which magnetized permanent magnets are arranged in order, and the first magnetic body and the second magnetic body include an electromagnetic coil of the first magnetic body and a second magnetic body. The magnetic coil and the electromagnetic coil are arranged so as to have an arrangement pitch difference, and the rotor is composed of the third magnetic body, and the blade structure is integrated with the third magnetic body. Formed.

  FIG. 1 is a side view of a motor structure according to the present invention. In (1), reference numeral 1 denotes a case, reference numeral 2 denotes a motor body accommodated in the case, and reference numeral 3 denotes a rotating shaft that is rotatably supported by the motor body. A refrigerant material 4 is filled between the motor body 2 and the case 1 so as to directly touch the motor body. The case is preferably made of an aluminum material having excellent thermal conductivity, but is not limited thereto. Reference numeral 5 denotes a conduit for filling the refrigerant material 2 </ b> A into the case, and this conduit is connected to the heat exchange unit 6. The heat generated in the motor main body is carried to the heat exchanging part by the refrigerant material, and is cooled by exchanging heat with the air / gas 6A in the heat exchanging part. The motor body is molded from the refrigerant material with resin or the like so that the refrigerant material does not enter the motor body. (2) indicates that the forced circulation means 7 is provided in the middle of the pipeline through which the refrigerant material flows. As this forced circulation means, there are an electric pump and a mechanical pump. (3) shows that fins 8 are laid on the periphery of the rotor 8A with respect to the stator 9, and the fins can stir the refrigerant material when the rotor rotates in the refrigerant material.

  2 to 5 show a schematic diagram of the motor structure according to the present invention and the principle of operation. This magnetic structure has a configuration in which a third magnetic body 14 is interposed between a first magnetic body (A-phase coil) 10 and a second magnetic body (B-phase coil) 12. These magnetic bodies are formed in an annular shape (arc shape, circle shape). Since the magnetic body is formed in an annular shape, either the third magnetic body or the first and second magnetic bodies function as a rotor. The first magnetic body 10 has a configuration in which coils 16 that can be alternately excited with different polarities are arranged in order at predetermined intervals, preferably at equal intervals. An equivalent circuit diagram of the first magnetic body is shown in FIG. According to FIGS. 2 to 5, as will be described later, the two-phase excitation coils are always excited with the polarity described above during the starting rotation (2π). Therefore, driven means such as a rotor and a slider can be rotated and driven with high torque. The equivalent circuit diagram of the second magnetic body is also the same as FIG. However, the excitation patterns of the first and second magnetic bodies are controlled as described later so that the rotor continuously rotates.

  As shown in FIG. 6A, a plurality of electromagnetic coils 16 (magnetic units) are connected in series at equal intervals. Reference numeral 18A denotes an excitation circuit block for applying a frequency pulse signal to the magnetic coil. When an excitation signal for exciting the coil to the electromagnetic coil 16 is sent from the excitation circuit, each coil is set to be excited so that the direction of the magnetic poles alternately changes between adjacent coils. As shown in FIG. 6 (2), the electromagnetic coils 16 may be connected in parallel.

  When a signal having a frequency for alternately switching the polarity direction of the excitation current to be supplied is applied to the electromagnetic coil 16 of the first magnetic body 10 from the excitation circuit 18A in a predetermined cycle, FIGS. As shown, a magnetic pattern is formed in which the polarity on the third magnetic body 14 side is alternately changed from N pole → S pole → N pole. When the frequency pulse signal has a reverse polarity, a magnetic pattern is generated in which the polarity of the first magnetic body on the third magnetic body side alternately changes from S pole → N pole → S pole. As a result, the excitation pattern appearing in the first magnetic body 10 changes periodically.

  The structure of the second magnetic body 12 is the same as that of the first magnetic body 10, but the electromagnetic coil 18 of the second magnetic body is arranged so as to be displaced with respect to the electromagnetic coil 16 of the first magnetic body. The point is different. That is, as described in the claims, the arrangement pitch of the coils of the first magnetic body and the arrangement pitch of the coils of the second magnetic body are set to have a predetermined pitch difference (angle difference). Yes. This pitch difference is the distance that the permanent magnet (third magnetic body) 14 moves with respect to the coils 16 and 18 corresponding to one period (2π) of the frequency of the excitation current, that is, a pair of N pole and S pole. A distance corresponding to π / 2, which is 1/4 of the total distance, is preferable.

  Next, the third magnetic body 14 will be described. As shown in FIGS. 2 to 5, the third magnetic body 14 is disposed between the first magnetic body and the second magnetic body, and a plurality of permanent magnets having opposite polarities alternately. 20 (filled in black) are arranged in a line (straight line or arc) in a predetermined interval, preferably an equal interval. The arc shape includes a closed loop such as a complete circle or ellipse, an unspecified annular structure, a semicircle, or a fan shape.

  The first magnetic body 10 and the second magnetic body 12 are arranged, for example, in parallel via an equal distance, and the third magnetic body is located at the center position between the first magnetic body and the second magnetic body. 14 is arranged. In the third magnetic body, the arrangement pitch of the individual permanent magnets is almost the same as the arrangement pitch of the magnetic coils in the first magnetic body 10 and the second magnetic body 12.

  Next, the operation of the magnetic body structure in which the above-described third magnetic body 14 is disposed between the first magnetic body 10 and the second magnetic body 12 will be described with reference to FIGS. By the excitation circuit described above (FIG. 618, which will be described later), the electromagnetic coils 16 and 18 of the first magnetic body and the second magnetic body are excited at a certain moment as shown in FIG. A pattern is generated.

  At this time, a magnetic pole is generated in a pattern of → S → N → S → N → S → on each coil 16 on the surface of the first magnetic body 10 facing the third magnetic body 14, and the second magnetic body 12 In the coil 18 on the surface facing the 3 magnetic body 14 side, magnetic poles are generated in a pattern of → N → S → N → S → N →. Here, an arrow displayed with a solid line in the figure indicates an attractive force, and an arrow displayed with a one-dot chain line indicates a reaction force.

  At the next moment, as shown in (2), when the polarity of the pulse wave applied to the first magnetic body via the drive circuit 18 (FIG. 6) is reversed, the first magnetic body 10 of (1) A repulsive force is generated between the magnetic pole generated in the coil 16 and the magnetic pole of the permanent magnet 20 on the surface of the third magnetic body 14, while the magnetic pole generated in the coil 18 of the second magnetic body 12 Since the attractive force is generated between the magnetic body 14 of the third magnetic body 14 and the magnetic poles on the surface of the permanent magnet, the third magnetic body sequentially moves in the right direction in the drawing as shown in (1) to (5). To do.

  A pulse wave that is out of phase with the exciting current of the first magnetic body is applied to the coil 18 of the second magnetic body 12, and as shown in (6) to (8), the second magnetic body The magnetic poles of the twelve coils 18 and the magnetic poles on the surface of the permanent magnet 20 of the third magnetic body 14 repel each other to move the third magnetic body 14 further to the right. (1) to (8) show the case where the permanent magnet has moved a distance corresponding to π, and (9) to (16) have moved the distance corresponding to the remaining π, that is, (1) Through (16), the third magnetic body moves relative to the first and second magnetic bodies by a distance corresponding to one period (2π) of the frequency signal supplied to the electromagnetic coils 16 and 18.

  In this manner, the third magnetic body 14 is rotated as a rotor by supplying frequency signals having different phases to the first magnetic body (A phase) and the second magnetic body (B phase). Can do.

  When the first magnetic body, the second magnetic body, and the third magnetic body are formed in an arc shape, the magnetic structure shown in FIG. 1 constitutes a rotary motor. The parts excluding permanent magnets and electromagnetic coils, such as cases and rotors, can be formed of a conductor, but it is more preferable to form a non-magnetic material such as resin, aluminum, magnesium, etc. It is possible to realize a rotary drive body such as a motor that is lightweight and has an open magnetic circuit and excellent in magnetic efficiency.

  According to this magnetic structure, since the third magnetic body can move by receiving a magnetic force from the first magnetic body and the second magnetic body, the torque when moving the third magnetic body is increased. Since the torque / weight balance is excellent, it is possible to provide a small lightweight motor that can be driven with high torque.

  FIG. 7 shows an example of an excitation circuit 18A for applying an excitation current to the electromagnetic coil (A phase electromagnetic coil) 16 of the first magnetic body and the electromagnetic coil (B phase electromagnetic coil) 18 of the second magnetic body. It is a block diagram.

  This excitation circuit is configured to supply controlled pulse frequency signals to the A-phase electromagnetic coil 16 and the B-phase electromagnetic coil 18, respectively. Reference numeral 30 denotes a crystal oscillator, and reference numeral 31 denotes an M-PLL circuit 3 1 for generating a reference pulse signal by dividing the oscillation frequency signal by M.

  Reference numeral 34 is a sensor that generates a position detection signal corresponding to the rotational position of the third magnetic body (in this case, the rotor) 14. As this sensor, a Hall sensor (magnetic sensor) or an optical sensor can be suitably selected. The number of holes corresponding to the number of permanent magnets is formed in the rotor (when a magnetic sensor is used, holes are not necessary by providing a magnetic sensor that reacts to each permanent magnet of the rotor in the optical sensor unit). When this hole corresponds to a sensor, the sensor generates a pulse each time it passes through the hole. Symbol 34A is a phase A side sensor for supplying a detection signal to the driver circuit of the phase A electromagnetic coil, and symbol 34B is a phase B side sensor for supplying the detection signal to the driver circuit of the phase B electromagnetic coil. is there.

  The pulse signals from the sensors 34A and 34B are output to a driver 32 for supplying excitation current to the first and second magnetic bodies, respectively. Reference numeral 33 denotes a CPU which outputs a predetermined control signal to the M-PLL circuit 31 and the driver 32.

  FIG. 8 is a block diagram illustrating a detailed configuration of the driver unit. The driver unit includes an A-phase side polarity switching unit 32A, a B-phase side polarity switching unit 32B, an A-phase side phase correction unit 32C, a B-phase side phase correction unit 32E, an A-phase buffer 32G, and a B-phase buffer. 32H, a D-PLL circuit 32I, and a forward / reverse switching unit 32J.

  A fundamental wave 31 obtained by dividing the oscillation frequency of the crystal oscillator by M is input to the driver 32. The polarity of the fundamental wave is switched by the polarity switching unit 32C for the A phase coil (first magnetic body), and is input to the phase correcting unit 32C for the A phase coil. The phase of the fundamental wave 31 is controlled by the phase switching unit 32B for the B phase coil (second magnetic body) and is output to the phase correction unit 32E for the B phase coil.

  The control signal of the CPU 33 is output to the forward rotation (forward) / reverse rotation (reverse) switching unit 32J of the rotor or slider, and the switching unit 32J is controlled by the CPU 33 according to the forward rotation / reverse rotation. The phase polarity switching units 32A and 32B are controlled.

  The output from the A-phase sensor 34A is output to the A-phase coil phase correction unit 32C, and the output from the B-phase sensor 34B is output to the B-phase coil phase correction unit 32E. Further, the fundamental wave whose polarity has been switched, which is output from the A phase polarity switching unit 32A, is output to the A phase correction unit 32C, and the fundamental wave from the B phase polarity switching unit is output to the B phase correction unit 32E. The A frequency signal obtained by further multiplying the fundamental wave by the post-phase-lock frequency division ratio (D) in the D-PLL circuit 32I is input to the A-phase phase correction unit 32C and the B-phase phase correction unit 32E, respectively.

  The CPU 33 uses the M division ratio described above as a predetermined memory in order to control the rotation speed of the rotor, which is the third magnetic body, or the speed of the slider based on input information from an operation input means (not shown). The frequency of the fundamental wave is changed according to the read value (M). Moreover, although mentioned later, it is the same also about the frequency division ratio (D) of D-PLL. These frequency division ratios change according to the values of the operating characteristics of the magnetic material such as the rotational speed of the rotor and the moving speed of the slider, and these characteristics are preset and stored in a predetermined memory area in the form of a memory table.

  The A-phase phase correction unit 32C and the B-phase phase correction unit 32E have an appropriate phase difference between each of the A-phase coil and the B-phase coil in order to rotate or move the rotor or slider that is the third magnetic body. In order to output the excited excitation frequency signal, the phases of the A-phase excitation frequency signal and the B-phase excitation frequency signal are corrected so as to be synchronized with the signals of the sensors 34A and 34B, respectively.

  The A-phase buffer unit 32G is a circuit means for supplying a phase-corrected frequency signal to the A-phase coil, and the B-phase buffer unit 32H is a circuit for supplying a phase-corrected frequency signal to the B-phase coil. Means.

  This motor includes a pair of A-phase magnetic body 10 and B-phase magnetic body 12 corresponding to a stator, and includes the above-described third magnetic body 14 constituting the rotor, and includes an A-phase magnetic body and a B-phase magnetic body. A rotor 14 is disposed between the body and the body so as to be rotatable about a center point O. The rotor is provided with six permanent magnets 20 equally in the circumferential direction, and the polarities of the permanent magnets are alternately reversed. The stators 10 and 12 are provided with six electromagnetic coils 16 and 18 in a circle. It is evenly provided in the circumferential direction.

  FIG. 9 shows the actual structure of a motor to which the present invention is applied. (1) is a perspective view of the motor, (2) is a schematic plan view of a rotor (third magnetic body), (3) Is a side view thereof, (4) is an A phase electromagnetic coil (first magnetic body), and (5) is a B phase electromagnetic coil (second magnetic body). The reference numerals given in FIG. 8 are the same as the corresponding components in the above-described drawings. Reference numeral 16 denotes a coil bobbin as a stator around which a coil is wound.

  This motor includes a pair of A-phase magnetic body 10 and B-phase magnetic body 12 corresponding to a stator, and includes the above-described third magnetic body 14 constituting the rotor, and includes an A-phase magnetic body and a B-phase magnetic body. A rotor 14 is disposed between the body and the body so as to be rotatable about a shaft 37. The rotary shaft 37 is press-fitted into the rotary shaft opening hole at the center of the rotor so that the rotor and the rotary shaft rotate integrally. As shown in FIGS. 8 (2), (4), and (5), the rotor is provided with six permanent magnets equally in the circumferential direction, and the polarities of the permanent magnets are alternately reversed. The stator is provided with six electromagnetic coils equally in the circumferential direction.

  The A-phase sensor 34A and the B-phase sensor 34B are provided on the case inner side wall of the A-phase magnetic body (first magnetic body) via a specific distance T (a distance corresponding to π / 2). The distance between the A phase sensor 34A and the B phase sensor 34B has a value corresponding to providing a predetermined phase difference between the frequency signal supplied to the A phase coil 16 and the frequency signal supplied to the B phase coil 18. Applied.

  As described above, the circumferentially formed edge of the rotor formed in a circular shape has a plurality of equally (for example, the number of permanent magnets equally arranged in the circumferential direction of the rotor, 6 in this embodiment). Holes) 35 are formed. The sensor includes a light emitting unit and a light receiving unit. A member that constantly reflects infrared light from the light emitting part of the sensor and absorbs it when detecting the position is applied to the hole.

  Now, the A-phase / B-phase sensor generates a pulse each time the above-described hole 35 passes through the sensor while the rotor 14 is rotating. That is, the hole 35 is provided with a groove or a light absorbing material for absorbing light, and the light receiving part of the sensor does not receive the light emitted from the light emitting part every time the hole passes through the sensor. Therefore, the sensor generates a pulse wave at a predetermined frequency according to the rotational speed of the rotor 14 and the number of holes.

  FIG. 10 shows a waveform diagram related to signal processing for the coil excitation frequency signal formed in the driver 32. In the following description, FIG. 8 may be referred to as necessary. (1) is a fundamental frequency waveform, (2) is a signal from the A-phase sensor 34A, and (3) is a signal from the B-phase sensor 34B. As described above, the A-phase sensor and the B-phase sensor are installed in the motor so as to produce a specific phase difference (in this case, π / 2) (see FIG. 8).

  The A-phase correction unit 32C executes a known PLL control to synchronize the phase of the output waveform (2) of the A-phase sensor with the phase of the fundamental wave (1), and the A-phase coil as shown in (4) A pulse wave for exciting 16 is output to the A-phase coil buffer circuit 32G. The buffer circuit configuration will be described later.

  The buffer circuit performs PWM control of a transistor in the buffer circuit for supplying an exciting current to the A-phase coil by an input pulse having a frequency. The operation of the B phase correction unit 32E is the same. (5) is a drive waveform output from the B-phase correction unit 32E to the B-phase electromagnetic coil buffer circuit 32H. As can be seen by comparing (4) and (5), the excitation signal supplied to the A-phase coil 16 and the excitation signal supplied to the B-phase coil 18 have different phases, and the phase difference is π / 2. is there.

  FIG. 11 shows signal waveforms when the rotor and slider are reversed. When this waveform is compared with the waveform of FIG. 10, the only difference is that the polarity of the excitation pulse wave supplied to the B-phase electromagnetic coil 18 is reversed in FIG. Compare (5) of FIG. 10 with FIG. 11 (5). When switching from FIG. 10 to FIG. 11, braking is performed in the rotational direction of FIG.

  FIG. 12 shows a detailed view of the A-phase / B-phase buffer circuit (32G, H) described above. This circuit includes switching transistors TR1 to TR4 for applying an exciting current made of a pulse wave to the A phase electromagnetic coil or the B phase electromagnetic coil. In addition, an inverter 35A is included.

  Now, when “H” is applied as a signal to the buffer circuit, TR1 is turned off, TR2 is turned on, TR3 is turned on, TR4 is turned off, and an exciting current having the direction of Ib is applied to the coil. On the other hand, when “L” is applied to the buffer circuit as a signal, TR1 is turned on, TR2 is turned off, TR3 is turned off, TR4 is turned on, and a current having a direction of Ia opposite to Ib is applied to the coil. The Accordingly, the excitation patterns of the A-phase electromagnetic coil and the B-phase electromagnetic coil can be changed alternately. This is as explained in FIG.

  FIG. 13 is a schematic view showing a state in which the rotor faces the stator with the coil wound around the bobbin so as to freely rotate. (1) is a schematic plan view thereof, and (2) is a schematic side view thereof. Here, when the bobbin 16A and the case are made of an aluminum material or the like, which is a non-magnetic conductive material prioritizing thermal conductivity, an eddy current is generated and causes a rotor load. Reference numeral 1A denotes an eddy current generation region. In FIG. 13, 16B indicates a conductor wound around a bobbin, and an arrow indicates the rotation direction of the rotor 14 (permanent magnet 20).

In order to prevent the generation of this eddy current, a plurality of slits were formed on the bobbin. FIG. 14 shows a plan view (1), an AA sectional view (2), a side view (3) and a BB sectional view (4) of the bobbin 16A. A conductive wire forming a coil is wound around a parallel portion between both end flanges 302 of the bobbin. As shown in (1), a plurality of the slides 300 are formed uniformly along the circumferential direction. The shape shown on the end surface of the bobbin of the slide is a strip shape, and is formed radially along the radial direction. As shown in (2) and (3), a plurality of the slits 300 are also formed at equal intervals along the radial direction in the axial direction of the bobbin 16A. The bobbin is entirely formed of an aluminum material. Alternatively, as shown in FIG. 15, the bobbin may be made of a material composed of a plurality of layers in which conductive layers 310 and insulating layers 320 are alternately arranged. The bobbin structure described here suppresses the generation of eddy currents, thereby reducing the rotor load. The conductive layer is made of aluminum, titanium, SUS, stainless steel or the like, and the insulating layer is made of an insulating resin having excellent thermal conductivity. Further, instead of forming a nonmagnetic metal having a plurality of slits formed on the bobbin, the bobbin may be made of a heat conductive resin as shown in FIG. (1) is a plan view of the bobbin, (2) is a side view, and (3) is an AA cross-sectional view. The thermally conductive resin is made of an epoxy resin containing carbon, and may be other glass materials or ceramic materials. Also, as shown in FIG. 17, the same effect can be obtained even if a heat conductive insulating material 16T is interposed between the coil bobbin and the case. (1) is a plan view of the coil bobbin, and (2) is a side view of the coil bobbin. In the embodiment shown in FIG. 17, the coil bobbin 16 </ b> A may have the Al structure with a small eddy current loss shown in FIG. 14, and the case 1 and the insulating layer 16 </ b> T may be combined with the same thermally conductive resin (containing carbon).

It is a schematic side view of the motor structure concerning this invention. The schematic diagram of the magnetic body structure concerning this invention and the principle of operation are shown. FIG. 2 shows an operation principle following FIG. FIG. 3 shows an operation principle following FIG. 2. FIG. FIG. 4 shows an operation principle following FIG. 3. FIG. It is an equivalent circuit diagram which shows the connection state of an electromagnetic coil. It is a block diagram which shows an example of the excitation circuit for applying an excitation current to an electromagnetic coil. It is a block diagram which shows the detailed structure of the driver part of an excitation circuit. It is a perspective view of the fan unit concerning an invention, (1) is a perspective view of the motor concerned, (2) is a schematic top view of a rotor, (3) is a plane of an A phase electromagnetic coil (the 1st magnetic body). FIG. 4 is a plan view of a B-phase electromagnetic coil (second magnetic body). FIG. 4 is a waveform diagram relating to signal processing for a coil excitation frequency signal formed in a driver. The signal waveform when rotating a rotor and a slider in reverse is shown. FIG. 12 shows a detailed view of the A-phase / B-phase buffer circuit (32G, H) described above. It is the schematic which shows the state which the eddy current has generate | occur | produced in the motor. It is a schematic block diagram which shows the state in which the slit was formed in the motor. It is a partial cross section figure of a coil bobbin. It is a schematic block diagram which shows the state by which the whole coil bobbin is formed from heat conductive resin. It is a schematic block diagram of a motor which shows the state in which the heat conductive insulating material is formed between the case and the coil bobbin.

Explanation of symbols

  1: case, 2: motor body, 3: rotating shaft, 5: circulation path of refrigerant material, 6: heat exchange section, 2A: refrigerant material, 10: first magnetic body, 12: second magnetic body, 14: first 3 magnetic body (rotor), 16, 18: electromagnetic coil, 20: permanent magnet

Claims (9)

 A motor structure in which a coil is wound around a coil bobbin and the coil bobbin is housed in a case, wherein the coil bobbin and the case are formed of a thermally conductive nonmagnetic material.  A motor structure in which a rotor and a stator are accommodated in a case, and a refrigerant material is introduced so as to fill the inside of the case.  The motor structure according to claim 2, wherein the rotor is provided with fins for stirring the refrigerant material.  3. The motor structure according to claim 2, further comprising means for forcibly circulating the refrigerant material in the case.  The motor structure according to claim 1, wherein the coil bobbin is provided with a plurality of slides.  The motor structure according to claim 1, wherein an insulating material is provided between the coil bobbin and the case.  7. The motor structure according to claim 1, wherein the coil bobbin is formed of a plurality of conductive layers with an insulating layer interposed therebetween. A third magnetic body disposed between the first magnetic body, the second magnetic body, and the magnetic body, and movable relative to the first and second magnetic bodies in a predetermined direction; A magnetic body,
Each of the first magnetic body and the second magnetic body has a configuration in which a plurality of excitable electromagnetic coils are arranged in order,
The third magnetic body has a configuration in which magnetized permanent magnets are arranged in order, and the first magnetic body and the second magnetic body are electromagnetic coils of the first magnetic body. And an electromagnetic coil of the second magnetic body are arranged so as to have an arrangement pitch difference from each other,
The motor structure according to any one of claims 1 to 7, wherein the rotor is composed of the third magnetic body, and the blade structure is formed integrally with the third magnetic body.  The motor structure according to any one of claims 1 and 5-8, wherein a refrigerant material is supplied into the case.

Images