JP2013021180A - Vibration measurement method and vibration measurement device of reactor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration measurement method and a vibration measurement device of a reactor device, which can measure a vibration value of vibration occurring by electrification of the reactor device in time shorter than a conventional case.SOLUTION: The vibration measurement method for measuring the vibration value of the reactor device 10 includes: a characteristic that a Youg's modulus changes with a temperature change of a dust core; a frequency range determining step for determining a frequency range (prescribed range) where a current frequency f (frequency) of AC current Iac which is made to flow to a coil 13 is changed in accordance with a temperature range for changing a temperature of the reactor device 10; and a vibration value measuring step for changing the current frequency f of the AC current Iac which is made to flow to the coil 13 within the frequency range and measuring the vibration value of the vibration occurring in the reactor device 10. Since the current frequency f of the AC current Iac which is made to flow to the coil 13 is changed only in the frequency range with such structure, the vibration value can be measured in short time.

Description

  The present invention relates to a reactor vibration measurement method for measuring a vibration value of vibration generated in a reactor device when energized, and a vibration measurement device that realizes the vibration measurement method.

  Conventionally, an example of a technique related to a reactor device that is excellent in heat dissipation and allows easy assembly of the reactor has been disclosed (see, for example, Patent Document 1). The reactor device includes a molded case and a reactor case, and includes a protrusion on the outer surface of the molded case.

  In general, in order to measure a vibration value in a predetermined temperature range with respect to the reactor device including the reactor device, it is necessary to change the temperature of the reactor device to be measured. In this case, every time the temperature that becomes the measurement point is reached (for example, every 5 degrees), the vibration value of vibration generated by energizing the reactor device is measured by a measuring instrument.

JP 2010-003838 A

  Although it is somewhat affected by the installation environment, the temperature of the reactor device changes as the coil is energized. However, in order to change the temperature in the target range, it is necessary to continue energization, so it takes time. In order to change the temperature of the reactor device quickly, the current supplied to the coil may be increased. However, in order to prevent damage to the coil, current exceeding the rated current cannot be passed, so there is a limit to changing the temperature quickly.

  The present invention has been made in view of such a point, and energizes a reactor device to be a measurement object (also referred to as “inspection object”, hereinafter the same), and measures the temperature (measurement point and measurement point) of the measurement range. It is an object of the present invention to provide a reactor vibration measurement method and a vibration measurement apparatus capable of measuring vibration values of vibrations occurring at a plurality of temperatures) in a shorter time than conventional.

  The invention according to claim 1, which has been made in order to solve the above problems, includes a coil that generates a magnetic flux when energized, a core that is a magnetic path of the magnetic flux generated by the coil, the coil and the core. In a reactor apparatus vibration measurement method for measuring a vibration value of a reactor apparatus having a case for housing, the core has a characteristic that Young's modulus changes with a temperature change of the core, and the object is to change the temperature of the reactor apparatus. A frequency range determining step for determining a predetermined range for changing the frequency of the current flowing through the coil corresponding to the temperature range, and vibration generated in the reactor device by changing the frequency of the current flowing through the coil within the predetermined range. And a vibration value measuring step for measuring the vibration value.

  The core having the characteristic that the Young's modulus changes with temperature change is formed using at least a magnetic material (mainly magnetic powder) or resin, as represented by “dust core”, for example. It is known that the Young's modulus varies depending on the temperature of a material having an elastic property such as a resin. Therefore, when the Young's modulus changes with a change in temperature, the resonance frequency (also referred to as “natural frequency”) of the core (and hence the reactor device) also changes.

  On the other hand, if the frequency of the current (alternating current) is changed in the coil while keeping the temperature of the core constant, the vibration value of the core (and hence the reactor device) also changes. It was discovered that changing the frequency of the current while changing the temperature of the core in various ways in the same manner changes the same as the change in the resonance frequency accompanying the change in Young's modulus described above. In other words, if the current frequency is based on a certain frequency, it can be understood as a change in the vibration value of the core with respect to the core temperature. Therefore, the principle of the present invention is to measure the vibration value of the core corresponding to the frequency of the current through the Young's modulus corresponding to the temperature of the core.

  According to this configuration, by simply changing the frequency of the current flowing through the coil within a predetermined range (that is, a frequency range corresponding to the temperature range for measurement), the magnitude of vibration generated in the reactor device (in this specification, simply “vibration”). Called "value"). Therefore, the vibration value can be measured in a short time without performing temperature management of the reactor device.

  According to a second aspect of the present invention, in the vibration value measuring step, a vibration peak value measured by changing a current frequency in the predetermined range is set as a vibration peak value in the target temperature range. Features. According to this configuration, the vibration value measured by changing the frequency of the current flowing through the coil in a predetermined range is set as the peak value. As described above, since the vibration value corresponding to the frequency of the current can be measured through the Young's modulus as a medium, the maximum value of the vibration value when the current frequency is changed within a predetermined range becomes the peak value as it is. Therefore, since the vibration peak value can be easily specified, it is possible to easily determine whether the product is a standard product.

  The invention according to claim 3 is characterized in that the vibration value measuring step changes a frequency of a current flowing through the coil within the predetermined range in an environment in which the temperature of the reactor device is maintained at a predetermined temperature. To do. According to this configuration, since the temperature management of the reactor device is performed, the vibration value can be measured more accurately.

  According to a fourth aspect of the present invention, in the frequency range determination step, the range for changing the frequency of the current flowing through the coil corresponding to the target temperature range for changing the temperature of the reactor device is specified. A numerical value is determined based on the state of the reactor device. According to this configuration, since the coefficient value is determined based on the state of the reactor device, the predetermined range relating to the frequency of the current flowing through the coil can be specified more accurately. Therefore, the vibration value can be measured more accurately. The “reactor device state” includes, for example, the form of the reactor device (coil, core, etc.) (ie, shape, material, content of magnetic substance, etc.), current temperature of the reactor device (specifically, core), core Including one or more of Young's modulus.

  According to a fifth aspect of the present invention, the frequency range determination step specifies a range in which a frequency of a current flowing through the coil is changed based on the specified coefficient value and a current temperature of the reactor device. It is characterized by. According to this configuration, since the current temperature of the reactor device is taken into consideration, the predetermined range in which the frequency of the current flowing through the coil can be specified more accurately.

  The invention according to claim 6 is a reactor device having a coil that generates magnetic flux when energized, a core that is a magnetic path of the magnetic flux generated by the coil, and a case that accommodates the coil and the core. In the vibration measuring device of a reactor device that measures a vibration value, the core has a characteristic that Young's modulus changes with a temperature change of the core, and corresponds to a target temperature range in which the temperature of the reactor device is changed, and the coil A frequency range determining means for determining a predetermined range for changing a frequency of a current to be passed through, an AC power source for supplying a current to the coil while changing the frequency within the predetermined range determined by the frequency range determining means, Vibration value measuring means for measuring a vibration value of vibration generated in the reactor device when the current flows through the coil. That. According to this configuration, similarly to the first aspect of the invention, the vibration value can be measured in a short time without performing the temperature management of the reactor device.

  According to a seventh aspect of the present invention, the frequency of the current flowing through the coil is changed in a predetermined range in correspondence with a target temperature range in which the temperature of the reactor device is changed, and a peak value of vibration to be measured is set as the target temperature range. The peak value of vibration in the temperature range is used. According to this configuration, as in the second aspect of the invention, the peak value of vibration can be easily specified, so that the quality determination as a standard product can be easily performed.

It is a top view which shows typically the structural example of a reactor apparatus. It is a longitudinal cross-sectional view in the II-II line arrow shown in FIG. It is a schematic diagram which shows the structural example of a vibration measuring apparatus. It is a graph explaining the relationship between core temperature and Young's modulus. It is a graph explaining the relationship between core temperature and resonant frequency (natural frequency). It is a graph explaining the relationship between core temperature and the frequency of an electric current. It is a graph explaining the relationship of the frequency with respect to the frequency and temperature of an electric current. It is a flowchart which shows the example of a procedure of a vibration measurement (inspection) process. It is a graph explaining the relationship between the frequency of an electric current, and a frequency. It is a circuit diagram which shows the usage example of a reactor apparatus.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. Unless otherwise specified, “current” means alternating current, and “connect” means electrical connection. Each figure shows elements necessary for explaining the present invention, and does not show all actual elements. The directions such as up, down, left and right are based on the description in the drawings. In order to avoid confusion about the frequency, the frequency of the alternating current is called “current frequency”, and the frequency of vibration (frequency) is called “vibration frequency”.

  First, a configuration example of a reactor device that is a measurement target of a vibration value will be described with reference to FIGS. 1 and 2. FIG. 1 schematically shows a configuration example of a reactor device in a plan view. FIG. 2 is a longitudinal sectional view taken along line II-II shown in FIG.

  A reactor device 10 shown in FIGS. 1 and 2 includes a case 11, a dust core 12, a coil 13, a terminal portion 14, an inner core 15. As long as the shape of the case 11 can accommodate the dust core 12, the coil 13, the core 15 and the like, any shape can be applied. In the case 11 of the present embodiment, as an example, the case 11 is formed in a box-shaped housing whose upper side is open (rectangular-shaped side corners are rounded). Moreover, the material of case 11 can apply the arbitrary materials which have heat resistance of the curing temperature (for example, 120-170 degreeC etc.) which the dust core 12 hardens | cures. As an example, the case 11 of the present embodiment uses an aluminum die cast manufactured by a die casting method.

  The case 11 has an accommodating portion 11a, a fastening hole 11b, a core 15 and the like. The accommodating portion 11a is a space surrounded by the inner wall surface and the bottom surface, and accommodates the coil 13, the dust core 12, and the like. A fastening hole 11 d for fixing the core 15 using the fastening member 19 is formed on the bottom surface of the case 11. The fastening hole 11d has counterbore (counterbore) for making the top surface of the fastening member 19 substantially the same position as the bottom surface and eliminating the step. Although not shown, the case 11 and the core 15 may be integrally formed (for example, a casting method). In this case, the fastening member 19 is unnecessary.

  In measuring the vibration value of the reactor device 10, the temperature sensor 16, the vibrator 17, the vibration sensor 18, and the like are attached to predetermined positions (for example, the outer surface of the case 11). The temperature sensor 16 is used when measuring the temperature of the reactor device 10 (mainly the temperature of the dust core 12), and corresponds to, for example, a thermistor or a resistance temperature detector. The vibrator 17 is used when measuring a frequency (that is, a resonance frequency) unique to the reactor device 10, and corresponds to, for example, a striking device or a vibrator. An example of the hitting device includes a hammer, a motor, a control unit, and the like, and has a function of hitting the case 11 with a hammer according to a vibration control signal vc described later. The vibration sensor 18 corresponding to the “vibration value measuring means” is optional as long as it can measure the magnitude of the vibration of the reactor device 10 (hereinafter referred to as “vibration value”) that occurs as the alternating current Iac flows. . For example, an acceleration sensor or a laser Doppler vibrometer is applicable.

  The dust core 12 corresponds to a “core”. The dust core 12 may be made of any material (component) as long as it has a characteristic that the Young's modulus changes with the temperature change of the dust core 12 itself. For the dust core 12 of this embodiment, a magnetic powder mixed resin obtained by mixing magnetic powder and resin and curing (also referred to as “solidification”) is used. The magnetic powder corresponds to a “magnetic material”, and any material can be used as long as it has magnetism. In this embodiment, for example, Fe—Si based powder is used. The resin may be made of any material as long as the magnetic powder can be mixed and cured. In this embodiment, for example, an epoxy resin (EP) which is a kind of thermosetting resin is used. The reason why the magnetic powder is mixed with the resin is to prevent a magnetic path of the magnetic flux generated by the coil 13 from leaking out of the case 11 and causing noise or the like.

  The coil 13 is connected to the terminal portion 14 (including the terminal block), and generates a magnetic flux when energized through the terminal portion 14. The coil 13 of this form is formed in the donut shape wound by many times as an example. As shown in FIG. 2, the terminal portion 14 is arranged at a position where it can be easily connected to the upper surface side of the dust core 12.

  The middle core 15 is disposed at a predetermined position of the accommodating portion 11a, and its shape can be arbitrarily formed. As the predetermined position, any position such as a center position, a gravity center position, and an eccentric position may be adopted. The core 15 of this embodiment is arranged at the center position (center portion) of the case 11 and is basically a cylindrical shape having a fastening hole 15a, and the side surface is a curved surface (specifically, a one-leaf hyperboloid surface recessed toward the center side). ). By forming the core 15 in such a shape, the dust core 12 is prevented from being removed from the case 11 after the dust core 12 is cured with heating, or the dust core 12 is moved in the axial direction of the core 15 (up and down). The function to prevent movement in the direction). Therefore, the shape shown in FIG. 2 is not limited as long as it has these functions.

  Next, a configuration example of the vibration measuring device 20 that measures the vibration value of the reactor device 10 described above will be described with reference to FIG. 3 includes an AC power supply 21, vibration control means 22, coefficient determination means 23, recording medium 24, pass / fail judgment means 25, power supply control means 26, range determination means 27, and the like. Among these elements, elements such as the vibration control means 22 and the coefficient determination means 23 illustrated by a two-dot chain line may be provided as necessary. Below, the function and action of each element will be described.

  The AC power source 21 is a power source that is connected to the terminal unit 14 of the reactor device 10 and outputs a measurement signal to the coil 13. In this embodiment, an alternating current Iac is used as a measurement signal. The current frequency f of the alternating current Iac follows a frequency control signal Ic transmitted from the power supply control means 26 described later. In FIG. 1, circuit elements for overcurrent protection (resistor R in this embodiment) are connected in series. An AC voltage may be used for the measurement signal instead of the AC current Iac.

  The vibration control means 22 is used to specify the resonance frequency fc (natural frequency) of the reactor device 10 at each temperature. The vibration control means 22 transmits a vibration control signal vc to the vibrator 17 attached to the outer surface of the case 11. The vibrator 17 illustrated with a two-dot chain line is attached to the outer surface of the case 11 as necessary. Upon receiving the vibration control signal vc, the vibrator 17 vibrates the reactor device 10 (specifically, the case 11) according to the vibration frequency included in the vibration control signal vc.

  As described above, the principle of the present invention is to measure the vibration value corresponding to the current frequency f of the alternating current Iac through the Young's modulus E corresponding to the temperature of the dust core 12 as a medium. In order to realize this, it is first necessary to collect and grasp how the Young's modulus E changes when the temperature of the dust core 12 is changed.

In general, as the characteristic line PL1 shown in FIG. 4 shows, the Young's modulus E decreases as the temperature of the dust core 12 (referred to as “core temperature” in this specification) Tc increases. In the temperature range from the lower limit temperature T _L (for example, −40 [° C.]) to the upper limit temperature T _U (for example, 140 [° C.]), the change in Young's modulus E exhibits linearity. At the lower limit temperature T _L , the Young's modulus E _L is obtained, and at the upper limit temperature T _U , the Young's modulus E _U is obtained. On the other hand, the Young's modulus E greatly changes (decreases) around a glass transition temperature Tg (for example, 180 [° C.]) higher than the upper limit temperature T _U. This means that the dust core 12 that has been solid melts and becomes rubbery. Therefore, data collection is performed in the temperature range from the lower limit temperature T _L to the upper limit temperature T _U.

  The above-described data collection is performed using a plurality of reactor devices 10 having different Young's modulus E under temperature control (for example, in a thermostatic bath) capable of maintaining the temperature T (that is, the core temperature Tc) of the reactor device 10 constant. . It is desirable that the plurality of reactor devices 10 use a group having a high Young's modulus E and a group having a low Young's modulus E among manufactured products. As long as there is a common change in Young's modulus E, which is greatly different, dust cores 12 having any Young's modulus E can be applied. For each of the reactor devices 10 actually included in the two groups described above, the vibrator 17 is vibrated by changing the vibration frequency while maintaining the core temperature Tc for each of the plurality of core temperatures Tc. The resonance frequency fc was obtained. The resonance frequency fc theoretically follows the following function equation (1), where “α” is a different coefficient value depending on the vibration target (in this embodiment, the dust core 12) and “M” is the weight of the vibration target.

  An example of the result of obtaining the resonance frequency fc as described above is shown as a graph in FIG. Hereinafter, data in which the core temperature Tc and the resonance frequency fc are set as one set is simply referred to as “related data”. A characteristic line PL2 indicated by a solid line in FIG. 5 is an approximate straight line obtained by the least square method based on the related data (plotted by the symbol “●”) for each reactor device 10 related to the group having a high Young's modulus E. A linear function). Similarly, a characteristic line PL3 indicated by a one-dot chain line is an approximate straight line obtained by the least square method based on related data (plotted by the symbol “■”) for each reactor device 10 relating to a group having a low Young's modulus E. . When the characteristic lines PL2 and PL3 are examined closely, the resonance frequency fc decreases as the core temperature Tc increases. Although not shown, similar results were obtained for other Young's modulus E groups. According to the characteristic lines PL2, PL3, etc. shown in FIG. 5, the change rate does not depend on the Young's modulus E, and is a substantially constant coefficient K (= Δf / ΔT). This coefficient K corresponds to a “coefficient value”.

  Returning to FIG. 3, the coefficient determining means 23 determines the coefficient K from the slope of the approximate straight line obtained by the least square method based on the related data obtained for the plurality of reactor devices 10. It is desirable to determine each time the form of the reactor device 10 (that is, the shape, material, content of magnetic substance, etc.) changes. In addition, as the number of related data increases, the accuracy of the coefficient K improves. Since the coefficient K determined in this way is used for frequency control of the AC power supply 21, it is recorded in the recording medium 24 as coefficient information 24b. In the case of automation, for each of the plurality of reactor devices 10, the vibration frequency is changed while maintaining the core temperature Tc for each of the plurality of core temperatures Tc to vibrate the vibrator 17, and the resonance frequency at the core temperature Tc. The process of obtaining fc and temporarily recording it as related data on the recording medium 24 may be controlled so as to be performed before the coefficient K is determined.

  The recording medium 24 can record a plurality of pieces of information such as a plurality of related data (that is, data in which the core temperature Tc and the resonance frequency fc are set as one set), coefficient information 24b (that is, coefficient K), and vibration information 24a described later. Any medium can be used. For example, one or more of flash memory (including SSD), a hard disk, an optical disk (including a magneto-optical disk, etc.), a flexible disk, and a RAM are applicable. Note that it is desirable to use a non-volatile memory that can retain information even after the power is turned off.

  The pass / fail determination means 25 has a function of determining and notifying whether the reactor device 10 to be measured is “normal product (accepted product)” or “defective product (failed product)”. Specifically, the determination is made according to whether or not the vibration value vi measured by the temperature sensor 16 exceeds the vibration standard value (vibration allowable value) vL. The notification method is arbitrary, for example, displaying with a lamp, a display, or the like, or sounding with a speaker, a buzzer, or the like.

The power supply control means 26 is within a frequency range Fs (specifically, a range from the lower limit current frequency f _L to the upper limit current frequency f _U ; see FIG. 6) included in a signal transmitted from the range determination means 27 described later. , The current frequency f of the alternating current Iac flowing through the coil 13 is controlled. The frequency range Fs corresponds to a “predetermined range”. The current frequency f is desirably controlled continuously within the frequency range Fs. Actually, it is necessary to satisfy various conditions such as a request for determining pass / fail in a short time and a request to shorten the time for which the alternating current Iac is passed through the coil 13 in order to suppress the temperature rise of the dust core 12. Therefore, the current frequency f is within the frequency range Fs and is changed for each of a plurality of discretely selected current frequencies f (for example, 5 points, 10 points, etc.).

It is known that when an alternating current Iac is passed through the reactor device 10 (particularly the coil 13), the reactor device 10 vibrates due to the coil 13. The current frequency f at which the vibration reaches a peak is substantially the same as the resonance frequency fc described above. Using such a property and the above-described coefficient K, when the core temperature is “Tc”, the relationship is expressed as “fm” as the current frequency applied to obtain the vibration value of the target temperature “T”. The approximate straight line (linear function) as shown in FIG. In FIG. 6, the vertical axis is the current frequency f, and the horizontal axis is the core temperature Tc. The current frequency f is an “equivalent frequency” corresponding to the vibration frequency. A characteristic line PL4 shown in FIG. 6 is an approximate line according to the following functional expression (2). Where "f _m (T)" is a function expression representation of the current frequency f of the measurement range is referred to as "f _c" is simply "reference frequency" in the operating frequency (hereinafter as a reference. For example 10 [kHz] "T" is the temperature (constant temperature) of the reactor device 10 (particularly the dust core 12).

The range determination unit 27 obtains a range of the current frequency f corresponding to the temperature range to be measured, and transmits it to the power supply control unit 26 as the frequency range Fs. That is, the lower limit current frequency f _L and the upper limit current frequency f _U are transmitted to the power supply control means 26 as the frequency range Fs. The lower limit current frequency f _L corresponding to the lower limit temperature T _L is obtained according to the above function equation (3). The upper limit current frequency f _U corresponding to the upper limit temperature T _U is obtained according to the above function equation (4).

On the other hand, even if the frequency range Fs (from the lower limit current frequency f _L to the upper limit current frequency f _U ) is known, it is unclear how the vibration value vi changes during that time. Therefore, for each of the plurality of core temperatures Tc, the reactor apparatus 10 was tested to change the current frequency f while maintaining the core temperature Tc, and the change in the vibration value vi accompanying the change in the current frequency f was measured. An example of the measurement result is shown in FIG.

FIG. 7A shows changes in the vibration value vi with the vertical axis representing the vibration value vi and the horizontal axis representing the current frequency f. In the example of FIG. 7A, the temperature of the reactor device 10 (that is, the core temperature Tc) is set at eight temperatures Ta, Tb, Td, Te, Tf, Th, Ti, and Tj under current temperature control. The frequency f is changed. The temperature relationship is Ta>Tb> T _U >Td>Te>Tf>Th>Ti> T _L > Tj. The vibration value vi corresponding to the vertex (maximum value, peak value) of the graph of each temperature is the natural frequency (resonance frequency) of the reactor device 10 related to the temperature.

FIG. 7B shows a change in the characteristic line PL5c in which the vertical axis represents the vibration value vi and the horizontal axis represents the core temperature Tc. Characteristic line PL5c shown in the example of FIG. 7 (B) shows the vibration value vi of the temperature at the reference frequency f _c shown in FIG. 7 (A), the relationship between the core temperature Tc the vibration value vi has occurred. As is apparent from the characteristic line PL1 shown in FIG. 4, the Young's modulus E decreases as the core temperature Tc increases. The vibration value vi increases so as to follow the core temperature Tc, and conversely decreases at a certain temperature. The temperature showing this boundary is considered to be the glass transition temperature Tg. When FIG. 7 (A) Try tested similarly shifted to a higher frequency f _b than the reference frequency f _c in changes as the characteristic line PL5b indicated by a chain line in FIG. 7 (B). Similarly, when a similar test is performed after shifting to a frequency f _d higher than the reference frequency f _c , the characteristic changes as indicated by a two-dot chain line in FIG. 7B. When the characteristic lines PL5b, PL5c, and PL5d are compared, the change properties are almost the same, but the core temperature Tc is changed.

  A procedure for measuring the vibration value vi of the reactor device 10 by the vibration measuring device 20 will be described with reference to FIG. FIG. 8 is a flowchart showing a procedure example of vibration measurement (inspection) processing for one reactor device 10. This procedure example may be realized by software centered on the CPU, or may be realized by hardware logic using circuit elements. What is necessary is just to perform the step shown with a dashed-two dotted line in a figure as needed. When vibration measurement (inspection) is performed for a plurality of reactor devices 10, the vibration measurement (inspection) processing of FIG. Further, the reactor device 10 (particularly the dust core 12) is temperature-controlled so as to maintain a constant temperature (for example, 25 [° C.]) set in a thermostatic chamber or the like. Steps S10 to S12 correspond to “frequency range determination step” and “frequency range determination means”, and steps S13 to S15 and S17 to S19 correspond to “vibration value measurement step” and “vibration value measurement means”. Step S16 corresponds to pass / fail judgment means 25, and steps S16 and S20 to S22 correspond to “inspection means”.

In the vibration measurement (inspection) process of FIG. 8, first, the temperature T of the reactor device 10 (corresponding to the core temperature Tc) is measured by the temperature sensor 16 [step S10], and the reactor device 10 resonates as shown in FIG. Relevant data having a set of the resonance frequency fc and the core temperature Tc is acquired, and the coefficients K of the characteristic lines PL2, PL3, etc. are obtained based on the plurality of acquired related data [step S11]. The frequency range Fs (that is, the lower limit current frequency f _L and the upper limit current frequency f _U ) is determined based on the characteristic line PL4 relating to the obtained coefficient K [step S12]. In addition, what is necessary is just to perform step S12, S13 as needed, such as when the reactor apparatus 10 is not maintained at fixed temperature by a thermostat etc.

First, the frequency of the alternating current Iac flowing through the coil 13 of the reactor device 10 is set to the lower limit current frequency f _L [step S13]. An alternating current Iac having a current frequency f that is currently set is passed through the coil 13 [step S14], and a vibration value vi obtained by measuring the vibration value vi of the vibration generated at the current current frequency f by the vibration sensor 18 is acquired (if necessary) And recorded as vibration information 24a on the recording medium 24 (step S15). Based on the acquired vibration value vi, it is determined whether or not the reactor device 10 to be measured is acceptable [step S16]. That is, when the vibration value vi acquired in step S15 exceeds the vibration standard value vL (YES in step S16), the reactor device 10 to be measured is set as “defective product” [step S22], and the process proceeds to step S21 described later.

On the other hand, if the vibration value vi acquired in step S15 is equal to or less than the vibration standard value vL (YES in step S16), the current frequency f is changed within the frequency range Fs (for example, increased by a frequency Δf), and then measured. The current frequency f to be set is set [step S17]. The frequency Δf can be arbitrarily set, and corresponds to 0.2 [kHz], for example. Until the current frequency f of the alternating current Iac reaches the upper limit current frequency f _U, it repeats the steps S14~S17 described above (YES in step S19), and measuring the vibration values vi for each current frequency f set in step S17, respectively . When the current frequency f of the alternating current Iac exceeds the upper limit current frequency f _U (NO in step S19), the reactor device 10 to be measured is set as “normal product” [step S20], and the process proceeds to step S21 shown below.

  In step S21, the process branches based on whether there is another reactor device 10 to be measured or inspected. If there is another reactor device 10 to be measured or inspected (YES in step S21), steps S10 to S20 and S22 described above are repeatedly executed. On the other hand, if there is no other reactor device 10 to be measured or inspected (NO in step S21), the vibration measurement (inspection) process is returned.

  When the vibration measurement (inspection) process described above is executed, for example, a result as shown in FIG. 9 can be obtained. In FIG. 9, as in FIG. 7B, the vertical axis represents the vibration value vi, the horizontal axis represents the core temperature Tc, and the vibration value vi obtained when the current frequency f is changed within the frequency range Fs. Showing change. In the example of FIG. 9, the results of measuring (inspecting) the three reactor devices 10 are shown as measurement lines ML1, ML2, and ML3. A discrimination example of these measurement lines ML1, ML2, and ML3 will be described below. In addition, although the part (line segment) shown with a dashed-two dotted line is not measured, the change of the vibration value vi assumed when actually measuring is shown.

Reactor device 10 of measurement line ML1 reaches vibration standard value vL at current frequency f _m1 and has vibration value vi exceeding vibration standard value vL (YES in step S16). [Step S22]. The reactor device 10 of the measurement line ML2 shows a vibration value v _m2 that is the maximum value (peak value) at the current frequency f _m2 , but the vibration value vi does not exceed the vibration standard value vL within the frequency range Fs ( NO at step S16), “normal product” is set [step S20]. The reactor device 10 of the measurement line ML3 shows a vibration value v _m3 that becomes a maximum value (peak value) at the upper limit current frequency f _U that is the upper limit of the frequency range Fs, and the vibration value vi vibrates within the frequency range Fs. Since it does not exceed the standard value vL (NO in step S16), it is determined as “normal product” [step S20]. The measurement line ML3 reaches the vibration standard value vL at the current frequency f _m3 indicated by the two-dot chain line, and has a vibration value vi exceeding the vibration standard value vL. " As described above, whether or not the reactor device 10 to be measured is a normal product is determined by whether or not the vibration value vi measured by the vibration sensor 18 exceeds the vibration standard value vL within the frequency range Fs.

  Reactor device 10 determined to be a normal product is used, for example, as a component of converter 30 shown in FIG. 10 (that is, reactor L30). The converter 30 is a so-called DC-DC converter, and has a boosting function of boosting and outputting power (voltage Ve) supplied from the DC power source Edc through the capacitor C1. The converter 30 includes a reactor L30, which is the reactor device 10 described above, in addition to the drive circuits Mu and Md, the switching elements Qu and Qd, and the diodes Du and Dd. Reactor L30 generates a back electromotive force by on / off control of switching elements Qu and Qd, and voltage Vdc is smoothed and output by capacitor C2.

According to the embodiment described above, the following effects can be obtained. First, according to claim 1, in the vibration measuring method for measuring the vibration value vi of the reactor device 10, the dust core 12 has a characteristic that the Young's modulus E changes with the temperature change of itself, and changes the temperature of the reactor device 10. A frequency range determining step for determining a frequency range Fs (predetermined range) for changing the current frequency f (frequency) of the alternating current Iac flowing through the coil 13 corresponding to the target temperature range (see steps S10 to S12 in FIG. 8). And a vibration value measurement step of measuring the vibration value vi of the vibration generated in the reactor device 10 by changing the current frequency f of the alternating current Iac flowing through the coil 13 within the frequency range Fs (see steps S14 to S19 in FIG. 8). (See FIGS. 1, 8, 9, etc.). According to this configuration, the vibration generated in the reactor device 10 can be simply changed by changing the current frequency f of the alternating current Iac flowing through the coil 13 in the frequency range Fs (the range from the lower limit current frequency f _L to the upper limit current frequency f _U ). The vibration value vi can be measured. Therefore, the vibration value vi can be measured in a short time without managing the temperature of the reactor device 10.

  Corresponding to claim 2, the vibration value measuring step uses the peak value of the vibration value vi measured by changing the current frequency f of the alternating current Iac in the frequency range Fs as the peak value of vibration in the target temperature range. The configuration is adopted (see step S19 in FIG. 8 and FIG. 9). According to this configuration, the maximum value of the vibration value vi measured by changing the current frequency f of the alternating current Iac flowing through the coil 13 within the frequency range Fs is set as the peak value. Therefore, since the vibration peak value can be easily specified, it is possible to easily determine whether the product is a standard product.

  Corresponding to claim 3, in the vibration value measuring step, the coil 13 is operated within the frequency range Fs in an environment in which the temperature of the reactor device 10 is maintained at a predetermined temperature (a temperature set in the thermostat, for example, 25 [° C.]). The frequency of the current flowing through the circuit is changed (see FIGS. 8 and 9). According to this configuration, since the temperature management of the reactor device 10 is performed, the vibration value vi can be measured more accurately.

  Corresponding to claim 4, the frequency range determining step is for specifying a range in which the current frequency f of the alternating current Iac flowing through the coil 13 is changed corresponding to the target temperature range in which the temperature of the reactor device 10 is changed. The coefficient K (coefficient value) is determined based on the state of the reactor device 10 (in this embodiment, a mode in which the temperature of the dust core 12 is maintained at 25 [° C.]) (see FIG. 3). According to this configuration, since the coefficient K is determined based on the state of the reactor device 10, the current frequency f of the alternating current Iac flowing through the coil 13 can be more accurately specified in the frequency range Fs. Therefore, the vibration value vi can be measured more accurately.

  Corresponding to claim 5, the frequency range determining step is a range in which the frequency of the alternating current Iac flowing through the coil 13 is changed based on the identified coefficient K and the current temperature of the reactor device 10 (set temperature of the thermostat). (That is, the frequency range Fs) is specified (see FIGS. 8, 6, and 9). According to this configuration, since the current temperature of the reactor device 10 is taken into account, the frequency range Fs in which the current frequency f of the alternating current Iac flowing through the coil 13 is changed can be specified more accurately.

  Corresponding to claim 6, in the vibration measuring device 20, a range for determining a frequency range Fs for changing the current frequency f of the alternating current Iac based on the temperature of the dust core 12 having the characteristic that the Young's modulus E changes with temperature change. A determination means 27; an AC power supply 21 for supplying an alternating current Iac to the coil 13 while changing the current frequency f within the frequency range Fs determined by the range determination means 27; and a reactor device when the alternating current Iac flows to the coil 13. 10 is provided with a vibration sensor 18 (vibration value measuring means) for measuring the vibration value vi of the vibration generated in 10 (see FIGS. 1, 3, 8, and 9). According to this configuration, the vibration value vi can be measured in a short time without performing temperature management of the reactor device 10.

  Corresponding to claim 7, the peak value of vibration measured by changing the current frequency f of the alternating current Iac flowing through the coil 13 within the frequency range Fs in correspondence with the target temperature range for changing the temperature of the reactor device 10. Is set as a peak value of vibration in the target temperature range (see step S19 in FIG. 8, FIG. 9). According to this configuration, since the peak value of vibration can be easily specified, it is possible to easily determine whether the product is a standard product.

[Other Embodiments]
Although the form for implementing this invention was demonstrated above, this invention is not limited to the said form at all. In other words, various forms can be implemented without departing from the scope of the present invention. For example, the following forms may be realized.

  In the above-described embodiment, the dust core 12, which is a magnetic powder mixed resin obtained by mixing and curing magnetic powder (Fe—Si based powder) and resin (epoxy resin), is applied to the core (FIG. 1, FIG. 1). See 2). Instead of this form, another core having the characteristic that the Young's modulus E changes with temperature change may be applied. Specifically, a dust core in which other magnetic powders or other resins are arbitrarily combined may be applied. Examples of other magnetic powders include iron oxide, chromium oxide, cobalt, and ferrite. Other resins include, for example, phenol resin (PF), melamine resin (MF), urea resin (urea resin, UF), unsaturated polyester resin (UP), alkyd resin, polyurethane (PUR), thermosetting polyimide (PI). ). In any case, since the Young's modulus E changes with the temperature change of the core, it is possible to obtain the same effect as the above-described embodiment.

  In the embodiment described above, the resonance frequency fc of the vibration generated in the reactor device 10 is obtained while maintaining each temperature T for a plurality of temperatures T, and the coefficient K (coefficient value) applied to the approximate straight line obtained by the least square method is obtained. (See step S11 in FIGS. 5 and 8). Instead of this form, approximation (straight line approximation, curve approximation, etc.) may be performed based on another approximation method, and a coefficient value specifying the corresponding approximate line may be obtained. There may be one coefficient value, or there may be two or more (for example, a quadratic curve or a cubic curve). For example, an approximate line is obtained using a function other than a linear function (for example, a hyperbolic function, an inverse hyperbolic function, a logarithmic curve, etc.). In addition, an approximation line is obtained by using one or more approximation methods among approximation based on analysis of variance, approximation based on regression analysis, approximation based on multiple regression analysis, approximation based on logistic regression, and the like. In any case, it is sufficient that an approximate line indicating the relationship between the core temperature Tc and the resonance frequency fc can be defined regardless of the Young's modulus E of the dust core 12. Therefore, by obtaining an approximate line suitable for the properties of the reactor device 10 (particularly the dust core 12), it is possible to obtain the same effects as those of the above-described embodiment.

  In the above-described embodiment, the coil device 13 is vibrated by changing the alternating current Iac within the frequency range Fs under the condition that the temperature of the dust core 12 is maintained at a constant temperature in a thermostat or the like. The value vi is measured (see steps S13 to S19 in FIG. 8). Instead of this form, the reactor device 10 is placed in the atmosphere (for example, on a desk), and the core temperature Tc of the dust core 12 applied to the reactor device 10 to be measured (inspected) changes due to the influence of the alternating current Iac, temperature, etc. In this case, the vibration value vi may be measured using a correction coefficient for correcting the change. If the correction coefficient corresponding to the temperature change of the dust core 12 is “Km”, the above-described functional equations (2) to (4) are modified and expressed as the following functional equations (5) to (7). be able to. Instead of the correction coefficient, a correction function (which may be defined by the above-described approximation method or the like) for correcting the change in the core temperature Tc may be applied.

In this case, first, the temperature sensor 16 is attached to the reactor device 10 as illustrated in FIG. In the flowchart shown in FIG. 8, the current core temperature Tc of the reactor device 10 (specifically, the dust core 12) is acquired in step S18 indicated by a two-dot chain line, and in step S16, the frequency “ The vibration value vi by the vibration sensor 18 may be measured by passing an alternating current Iac of “f _m (Tc)” through the coil 13. In the frequency range Fs, the lower limit current frequency f _L is obtained by the function equation (6), and the upper limit current frequency f _U is obtained by the function equation (7). In this way, the vibration value vi corresponding to the target temperature range can be measured by changing the current frequency f of the alternating current Iac within the frequency range Fs without performing temperature management of the reactor device 10. Therefore, it is possible to obtain the same operational effects as those of the above-described embodiment.

[Other Aspects of Invention]
Although the embodiments of the invention have been described above, the embodiments include not only the embodiments of the invention described in the claims but also other embodiments of the invention. Aspects of the present invention are listed below, and related explanations are given as necessary.

[Aspect 1] Based on a vibration value of a reactor device including a coil that generates a magnetic flux when energized, a core that is a magnetic path of the magnetic flux generated by the coil, and a case that houses the coil and the core. In the reactor vibration inspection device that inspects the reactor device,
The core has a characteristic that Young's modulus changes with temperature change of the core,
Corresponding to a target temperature range for changing the temperature of the reactor device, a frequency range determining means for determining a predetermined range for changing the frequency of the current flowing through the coil;
An alternating current power source for passing a current through the coil while changing the frequency within the predetermined range determined by the frequency range determining means;
Vibration value measuring means for measuring a vibration value of vibration generated in the reactor device when the current flows through the coil;
Based on the vibration value measured by the vibration value measuring means, an inspection means for inspecting whether or not the reactor device is a standard product (normal product),
A reactor apparatus vibration inspection apparatus comprising:

[Related description of aspect 1]
According to the configuration of the first aspect, based on the vibration value generated by flowing the current through the coil while changing the frequency within the predetermined range determined by the frequency range determining means (step 12 in FIG. 8) (step S13 in FIG. 8). To S15, S17 to S19), whether or not the reactor device 10 is a standard product (normal product) can be inspected (steps S16 and S20 to S22 in FIG. 8). Therefore, the reactor device 10 to be inspected can be inspected without performing temperature management.

10 Reactor device 12 Dust core (core, magnetic powder mixed resin)
13 Coil 16 Temperature sensor 17 Exciter 18 Vibration sensor (acceleration sensor)
DESCRIPTION OF SYMBOLS 20 Vibration measuring device 21 AC power supply 22 Vibration control means 23 Coefficient determination means 24 Recording medium 24a Vibration information 24b Coefficient information 25 Pass / fail judgment means 26 Power supply control means 27 Range determination means Iac AC current K coefficient (coefficient value)
vi Vibration value T temperature Tc Core temperature (reactor device temperature)

Claims (7)

A reactor device that measures a vibration value of a reactor device that includes a coil that generates magnetic flux when energized, a core that is a magnetic path of the magnetic flux generated by the coil, and a case that houses the coil and the core. In the vibration measurement method,
The core has a characteristic that Young's modulus changes with temperature change of the core,
Corresponding to the target temperature range for changing the temperature of the reactor device, a frequency range determining step for determining a predetermined range for changing the frequency of the current flowing through the coil;
A vibration value measuring step of changing a frequency of a current flowing through the coil within the predetermined range and measuring a vibration value of vibration generated in the reactor device;
A reactor apparatus vibration measurement method comprising:   2. The vibration value measuring step according to claim 1, wherein a vibration peak value measured by changing a current frequency in the predetermined range is set as a vibration peak value in the target temperature range. Reactor device vibration measurement method.   The said vibration value measurement process changes the frequency of the electric current sent through the said coil within the said predetermined range in the environment which maintains the temperature of the said reactor apparatus with a predetermined temperature, The Claim 1 or 2 characterized by the above-mentioned. Reactor device vibration measurement method.   In the frequency range determination step, a coefficient value for specifying a range in which the frequency of the current flowing in the coil is changed corresponding to a target temperature range in which the temperature of the reactor device is changed is set in the state of the reactor device. It determines based on, The vibration measuring method of the reactor apparatus as described in any one of Claim 1 to 3 characterized by the above-mentioned.   The frequency range determination step specifies a range in which a frequency of a current flowing through the coil is changed based on the identified coefficient value and a current temperature of the reactor device. Method for measuring the vibration of the reactor device of the present invention. A reactor device that measures a vibration value of a reactor device that includes a coil that generates magnetic flux when energized, a core that is a magnetic path of the magnetic flux generated by the coil, and a case that houses the coil and the core. In the vibration measuring device,
The core has a characteristic that Young's modulus changes with temperature change of the core,
Corresponding to a target temperature range for changing the temperature of the reactor device, a frequency range determining means for determining a predetermined range for changing the frequency of the current flowing through the coil;
An alternating current power source for passing a current through the coil while changing the frequency within the predetermined range determined by the frequency range determining means;
Vibration value measuring means for measuring a vibration value of vibration generated in the reactor device when the current flows through the coil;
A reactor apparatus vibration measurement device comprising:   Corresponding to the target temperature range in which the temperature of the reactor device is changed, the frequency of the current flowing through the coil is changed in a predetermined range, and the measured vibration peak value is set as the vibration peak value in the target temperature range. The reactor vibration measurement device according to claim 6.