WO2022230073A1 - ファンモータを備えたモータ駆動装置及びモータ駆動装置の制御方法 - Google Patents
ファンモータを備えたモータ駆動装置及びモータ駆動装置の制御方法 Download PDFInfo
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- WO2022230073A1 WO2022230073A1 PCT/JP2021/016856 JP2021016856W WO2022230073A1 WO 2022230073 A1 WO2022230073 A1 WO 2022230073A1 JP 2021016856 W JP2021016856 W JP 2021016856W WO 2022230073 A1 WO2022230073 A1 WO 2022230073A1
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- Prior art keywords
- fan motor
- motor
- drive device
- motor drive
- fan
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000009825 accumulation Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000001186 cumulative effect Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 230000006870 function Effects 0.000 abstract description 4
- 238000011109 contamination Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000356 contaminant Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000003252 repetitive effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 239000002173 cutting fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/02—Details of starting control
- H02P1/029—Restarting, e.g. after power failure
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/18—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual dc motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
Definitions
- the present invention relates to a motor drive device having a fan motor and a control method for the motor drive device.
- Motor drive devices such as servo amplifiers used in machine tools and robots may generate heat due to use and may not operate normally. Therefore, in many cases, a fan motor is provided in the motor driving device to cool the motor driving device.
- Patent Document 1 As a technique for restarting a fan motor stuck due to contamination, a technique for restarting the fan motor by increasing the torque or rotating in forward and reverse directions is known (see Patent Document 1, for example). Also, there is known a technique of rotating the impeller by connecting the impeller to the rotor when the fan motor stops due to sticking or the like (for example, see Patent Document 2). Furthermore, there is known a technique of ejecting compressed air from a nozzle provided in the vicinity of the fan motor to remove dirt adhering to the fan motor (see, for example, Patent Document 3).
- One aspect of the present disclosure is a motor drive device having a fan motor, wherein a current lower than that during normal use of the fan motor is intermittently applied to the fan motor that is stuck due to adhesion or accumulation of dirt. and a restarting unit for restarting the fan motor.
- Another aspect of the present disclosure is a control method for a motor drive device having a fan motor, wherein the fan motor stuck due to adhesion or accumulation of dirt is supplied with a current lower than that during normal use of the fan motor.
- a control method comprising restarting the fan motor by intermittently flowing.
- a fan motor fixed due to contamination can be easily restarted by a simple means. It is possible to prevent a decrease in the operating rate of
- FIG. 1 is a schematic perspective view of a motor drive device according to one embodiment
- FIG. 7 is a graph showing an example of PWM control of the number of revolutions of a fan motor
- FIG. 4 is a perspective view showing an example in which a mechanism for applying an external force to blades of a fan motor is provided in a motor drive device main body
- 4 is a view of the mechanism of FIG. 3 as seen from above the fan motor
- FIG. FIG. 4 is a diagram showing an example in which a mechanism for applying an external force to the blades of the fan motor is provided in the casing of the fan motor
- FIG. 6 is a diagram showing a state in which the mechanism of FIG. 5 is pushing the blades of the fan motor
- FIG. 4 is a diagram showing an example of a mechanism for transmitting power between two fan motors; It is a figure which shows the example which unitized the fan motor.
- FIG. 5 is a diagram showing an example of fixing the fan motor unit with screws;
- FIG. 5 is a diagram showing an example of fixing the fan motor unit with a clamp;
- It is a figure which shows the example which provided the heat source in the stator of the fan motor.
- It is a figure which shows the example which provided the heat source in the casing of the fan motor.
- FIG. 1 is a schematic perspective view of a motor drive device according to a preferred embodiment.
- the motor drive device 10 is, for example, a servo amplifier for driving each axis of a machine tool, and includes a case (main body) 14 having an electronic component 12 therein, a radiator 16 attached to the main body 14, and a radiator 16.
- the electronic component 12 includes a processor, a memory, a control circuit, and the like for controlling a driving motor (for example, a servomotor) of a machine tool or a robot, and detects the rotation speed of the fan motor based on the output of an encoder (not shown).
- the electronic component 12 also functions as a restarting unit for a fan motor stuck due to contamination.
- a plurality of heat radiation fins 22 are provided inside the radiator 16 , extending parallel to each other and separated from each other and thermally connected to the electronic component 12 .
- the external fan motor 18 is attached to the upper surface of the radiator 16 having an exhaust port 26 formed therein. When the external fan motor 18 rotates, air flows from the intake port 24 formed at the bottom of the radiator 16 to the exhaust port 26. is generated, and the heat of the electronic component 12 is radiated to the outside through the heat radiating fins 22 by the air flow.
- the internal fan motor 20 is mounted on the upper surface of the main body 14 in which the air outlet 28 is formed, and when the internal fan motor 20 rotates, the air inlet (not shown) formed in the lower part of the main body 14 reaches the air outlet 28 . An air flow is generated, and the heat of the electronic component 12 is radiated to the outside by the air flow.
- the radiator 16 is not essential, and at least one fan motor is sufficient except for Example 6, which will be described later, and there is no need for a plurality of fan motors.
- the first fan motor 18, which is more susceptible to dirt than the second fan motor 20 inside the main body, is stuck due to dirt, and the means for restarting this will be described. It is also possible to use this means to restart the internal fan motor 20 .
- Example 1 The electronic components 12 and the like are intermittently driven by the fan motor 18 by the circuit system inside the motor driving device 10 for a predetermined time (for example, within 5 seconds or within 10 seconds) after the motor driving device 10 is powered on. and send it to the fan motor 18.
- a predetermined time for example, within 5 seconds or within 10 seconds
- the fan motor will rotate only for a moment when the power is turned on. It often stops spinning.
- Embodiment 1 since the current is intermittently applied to the fan motor 18, the operation of rotating only for a moment is repeated. , allowing the fan motor 18 to rotate continuously.
- the current intermittently applied to the fan motor 18 may be less than that during normal use. Then, there is no need to supply a higher current than during normal use and to rotate the fan motor 18 in forward and reverse directions. Therefore, in the present embodiment, there is no need to change the design or specifications, such as increasing the wire diameter of the coil to allow a larger current to flow, or to provide the motor drive device with a dedicated circuit or the like for forward/reverse rotation. This also applies to Examples 2 and 3, which will be described later.
- Example 2 If the motor drive device 10 is compatible with PWM (pulse width modulation) control, the number of revolutions of the fan motor 18 can be controlled by PWM control. For example, if the number of revolutions of the fan motor 18 should be increased from zero to N as shown in the graph on the left side of FIG.
- the repetitive PWM control provides an effect equivalent to repetitive application of rotational torque.
- the second embodiment does not require additional circuits or the like, and can be realized only by changing the control.
- Example 3 When the power source or the like of the motor drive device 10 is interlocked with the power source or the like of a machine such as a machine tool or a robot provided with the motor drive device 10, the rotational torque is increased by repeatedly turning on/off the power of the machine. An effect equivalent to giving repeatedly can be obtained. This operation may be performed manually by an operator, or may be performed automatically.
- each of Embodiments 1 to 3 has means for intermittently passing a current (rated current, etc.) below normal use to the fan motor 18 .
- normal use means normal use based on the specifications of the fan motor 18, and does not include torque (current) increase for forcibly rotating from a stuck state, forward/reverse rotation, etc. do not have.
- torque current
- Embodiments 1 to 3 even if there is no abnormality or damage in the electric circuit or structure of the fan motor, the state in which the fan motor 18 cannot be started due to large friction caused by highly viscous dirt can be easily resolved at low cost. be able to.
- the intermittent supply of current may be performed each time the motor driving device is started, but when it is detected that the fan motor 18 is stuck (when the fan motor 18 does not rotate even when the power is turned on). Alternatively, it may be performed when a sign of sticking of the fan motor 18 (for example, a decrease in rotation speed) is detected.
- an external force applying mechanism 32 for automatically applying an external force to the blades 30 of the fan motor 18 is mounted on the main body 14.
- the external force applying mechanism 32 is a solenoid using an electromagnet, and the tip 35 of a rod-shaped member 34 configured to be able to contact and separate from the blades 30 by turning the electromagnet on and off contacts the blades 30. gives an external force (rotational torque).
- a torque exceeding the static frictional force between (the blades 30 of) the fan motor 18 and dirt can be applied to the blades 30, and the fan motor 18 can be rotated.
- the solenoid 32 can be configured to operate automatically, but the operating condition may be, for example, to operate each time the motor drive device 10 is started, or to detect that the fan motor 18 is stuck. It can be activated when Further, instead of the solenoid 32, a mechanical structure may be used in which a protrusion such as a rod-shaped member 34 is configured to be able to come into contact with and separate from the blades 30. FIG.
- Embodiment 5 shown in FIGS. 5 and 6 is the same as Embodiment 4 in that it is configured to be able to come into contact with and separate from the blades 30 and has a mechanism for applying an external force to the fan motor 18, but in Embodiment 4 The difference is that the external force application mechanism (solenoid 32 or the like) is provided on the main body 14 while it is provided on the case 36 of the fan motor 18 .
- the external force application mechanism solenoid 32 or the like
- Embodiment 6 shown in FIG. 7 has a mechanism for transmitting the power (rotational torque) of the internal fan motor 20 to the external fan motor 18 .
- the internal fan motor 20 is rotated. of power (rotational torque) can be transmitted to the external fan motor 18 .
- the power of the internal fan motor 20 which is relatively hard to get dirty, to apply rotational torque to the external fan motor 18 and rotate the fan motor 18.
- a seventh embodiment, shown in FIGS. 8 and 9, has means for loosely securing the fan motor unit 52 to the body 14 .
- the fan motor 18 is fixed to the metal plate 50 with screws or the like, and the cover 51 is fixed to the metal plate 50 to form the fan motor unit 52 .
- the fan motor unit 52 is fixed to the main body 14 with fastening means 54 such as screws or bolts.
- looseness is intentionally generated between the members by loosening the screws or bolts 54.
- the fan motor unit 52 can be vibrated by the rotation of the fan motor 18 itself. By this vibration, it is possible to shake off the dirt that may cause sticking, or to change the state of the dirt to reduce the static frictional force between the dirt and the blade 30 .
- the operation of loosening the screw 54 may be performed by an operator at a predetermined timing (described later) such as when a sign of fixation of the fan motor 18 is detected, or an appropriate automatic machine (not shown) may be used. can also be done. If an automated machine is used, the loose screw 54 may be tightened once the fan motor 18 begins to rotate.
- the eighth embodiment shown in FIG. 10 is the same as the seventh embodiment in that the coupling between the members is loosened to intentionally generate vibration, but the difference is that a clamp 56 is used as means for fixing the members.
- the clamp 56 has a rod-shaped member 58 that can be displaced by an electromagnet or the like. By using the rod-shaped member 58 to grip the cover 51 that is a part of the fan motor unit 52, the fan motor unit 52 is fixed to the main body 14. is configured as
- the ninth embodiment shown in FIGS. 11 to 13 has a means for removing dirt adhering to the fan motor 18 by heating at a predetermined timing.
- a heating unit (heat source) 60 is provided in the stator of the fan motor 18 or in the vicinity thereof, and the heat source 60 is automatically turned on when the fan motor 18 is fixed due to contamination or a sign thereof is detected. By operating, the dirt attached to the fan motor 18 can be heated. Normally, the dirt adhering to the fan motor 18 is solidified, but is softened or liquefied by heating.
- FIG. 12 shows an example in which a heat source 62 is provided along the inner surface of the case 36 of the fan motor 18, and FIG. 13 shows an example in which a heat source 64 is provided between the fan motor 18 and the main body 14.
- the heat sources 62 and 64 can be automatically activated when the fan motor 18 sticks due to dirt or a sign thereof is detected, so that the dirt adhering to the fan motor 18 can be heated.
- a heat source it is preferable to appropriately select the installation position of the heat source according to the part where dirt tends to adhere.
- Various types of heat sources can be used, including coil heaters, band heaters, ribbon heaters, and cord heaters.
- Embodiment 10 shown in FIG. 14 has a means for physically or chemically removing dirt adhering to the fan motor 18 using a fluid, especially a cleaning liquid.
- a container 66 containing the cleaning liquid is provided at an appropriate location (here, inside the main body 14), and a fan is supplied from a nozzle 68 or the like fluidly connected to the container 66 using a pump or the like (not shown).
- a fan is supplied from a nozzle 68 or the like fluidly connected to the container 66 using a pump or the like (not shown).
- a tray (not shown) or the like may be provided below the fan motor 18 to collect the removed dirt and cleaning liquid.
- the cleaning of the fan motor 18 with fluid can be automatically performed at a predetermined timing such as when the fan motor 18 is fixed due to contamination or a sign thereof is detected.
- the predetermined timing in the seventh to tenth embodiments is the time when the fan motor 18 is stuck or its sign is detected by the detection unit, and the cumulative operation time of the fan motor after the fan motor 18 is replaced or cleaned. It may be measured by an appropriate timer or the like, and may be defined as when the cumulative operating time reaches a predetermined value such as 3 months, 6 months or 1 year.
- the predetermined timing is preferably a point in time when the fan motor 18 is stuck due to contamination or is likely to be stuck.
- Example 9 or 10 the means for intermittently applying current as in Example 1 and the external force application mechanism as in Example 4 may be combined, and furthermore, the dirt removing mechanism as in Example 9 or 10 may be combined. You can also combine them.
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- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Electric Motors In General (AREA)
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Abstract
Description
電子部品12等は、モータ駆動装置10に電源を投入してから所定の時間(例えば5秒以内、又は10秒以内)の間は、モータ駆動装置10内部の回路システムによってファンモータ18に断続的に電流を流すような指令を作成してファンモータ18に送る。これにより、ファンモータ18に回転トルクを反復的に与えることができ、汚れ等によって固着したファンモータ18を回転させることができる。一般に、汚れでファンモータが固着したときに通常の起動操作をする(すなわち連続的に電流を流す)と、電源投入時の一瞬のみファンモータが回転し、その後は通電しているにも関わらず回転が停止してしまうことが多い。しかし実施例1では、ファンモータ18に断続的に電流を流すので、一瞬のみ回転する動作が繰り返され、これにより汚れの粘性や摩擦係数が低下し、最終的には回転トルクが汚れの摩擦力を上回り、ファンモータ18は連続的に回転することができるようになる。
モータ駆動装置10がPWM(pulse width modulation)制御に対応している場合、PWM制御によってファンモータ18の回転数を制御することができる。例えば、ファンモータ18の回転数を図2の左側のグラフのようにゼロからNまで増加すべき場合、図2の右側のグラフのように、例えば回転数の100%と0%のオンデューティを繰り返すようなPWM制御により、回転トルクを反復的に与えることと同等の効果が得られる。実施例2は、追加の回路等を必要とせず、制御的な変更のみで実現することができる。
モータ駆動装置10の電源等が、モータ駆動装置10が設けられた工作機械やロボット等の機械の電源等と連動している場合、該機械の電源を繰り返しON/OFFする操作により、回転トルクを反復的に与えることと同等の効果が得られる。この操作は作業者が手動で行ってもよいし、自動で行うこともできる。
図3及び図4に示す実施例4では、ファンモータ18の羽根30に自動的に外力を与える外力付与機構32を、本体14に実装する。図示例では、外力付与機構32は電磁石を利用したソレノイドであり、該電磁石のON/OFFによって羽根30に対して接離可能に構成された棒状部材34の先端35が、羽根30に当接することで外力(回転トルク)を与える。これにより、ファンモータ18(の羽根30)と汚れとの間の静止摩擦力を上回るトルクを羽根30に与えることができ、ファンモータ18を回転させることができる。
図5及び図6に示す実施例5は、羽根30に対して接離可能に構成され、ファンモータ18に外力を付与する機構を有する点では実施例4と同じであるが、実施例4では外力付与機構(ソレノイド32等)を本体14に設けるのに対し、ファンモータ18のケース36に設ける点で相違する。
図7に示す実施例6は、内部ファンモータ20の動力(回転トルク)を外部ファンモータ18に伝達する機構を有する。具体的には、ファンモータ18の回転軸40に取り付けた第1プーリ42と、ファンモータ20の回転軸44に取り付けた第2プーリ46とをベルト48等で連結することにより、内部ファンモータ20の動力(回転トルク)を外部ファンモータ18に伝達することができる。これにより、外部ファンモータ18が汚れ等により固着しても、比較的汚れ難い内部ファンモータ20の動力を利用して外部ファンモータ18に回転トルクを与え、ファンモータ18を回転させることができる。
図8及び図9に示す実施例7は、ファンモータユニット52を本体14に対して緩く固定する手段を有する。具体的には、図8に示すようにファンモータ18を板金50にネジ等で固定し、板金50に対してカバー51を固定して、ファンモータユニット52を構成する。次に図9に示すようにファンモータユニット52を本体14にネジ又はボルト等の締結手段54で固定する。
図10に示す実施例8は、部材間の結合を緩めて意図的に振動を発生させる点では実施例7と同じであるが、部材間の固定手段としてクランプ56を用いる点で相違する。クランプ56は、電磁石等により変位可能な棒状部材58を有し、棒状部材58を用いてファンモータユニット52の一部であるカバー51を把持することにより、ファンモータユニット52を本体14に固定するように構成されている。
図11~図13に示す実施例9は、所定のタイミングでファンモータ18に付着した汚れを加熱により除去する手段を有する。具体的には、図11に示すように、ファンモータ18のステータ又はその近傍に加熱部(熱源)60を設け、汚れによるファンモータ18の固着又はその予兆が検知されたら熱源60を自動的に作動させることにより、ファンモータ18に付着した汚れを加熱することができる。通常、ファンモータ18に付着した汚れは固化しているが、加熱によって軟化又は液状化するので、汚れの粘性又は摩擦力は低減し、ファンモータ18を再起動しやすくなる。
図14に示す実施例10は、ファンモータ18に付着した汚れを、流体、特に洗浄液を用いて物理的又は化学的に除去する手段を有する。具体的には、洗浄液を含む容器66を適所(ここでは本体14の内部)に設け、容器66に流体的に接続されたノズル68等の吐出部からポンプ等(図示せず)を用いてファンモータ18に向けて洗浄液を所定のタイミングで付与(噴霧・滴下等)することにより、ファンモータ18に付着した汚れを物理的に吹き飛ばしたり、化学的に分解して洗い流したりすることができる。なおファンモータ18の下方にトレイ(図示せず)等を設け、除去された汚れ及び洗浄液を回収するようにしてもよい。
12 電子部品
14 本体
16 放熱器
18 第1ファンモータ
20 第2ファンモータ
22 放熱フィン
30 羽根
32 ソレノイド
34、38 突起
36 ケース
38 突起
40、44 回転軸
42、46 プーリ
48 ベルト
50 板金
52 ファンモータユニット
54 ネジ
56 クランプ
58 棒状部材
60、62、64 熱源
66 容器
68 ノズル
Claims (14)
- ファンモータを備えたモータ駆動装置であって、
汚れの付着又は堆積によって固着状態の前記ファンモータに対し、前記ファンモータの通常の使用時以下の電流を断続的に流すことで前記ファンモータを再起動する再起動部を具備する、モータ駆動装置。 - 前記再起動部は、前記モータ駆動装置の電源投入時から所定の時間の間、前記モータ駆動装置内部の回路システムによって前記ファンモータに断続的に電流を流すように構成されている、請求項1に記載のモータ駆動装置。
- 前記再起動部は、前記ファンモータの回転数をPWM制御によって制御するように構成されている、請求項1に記載のモータ駆動装置。
- 前記再起動部は、前記モータ駆動装置が取り付けられた機械の電源を繰り返しON/OFFするように構成されている、請求項1に記載のモータ駆動装置。
- 前記再起動部は、前記ファンモータに外力を付与することで前記ファンモータを再起動する外力付与機構を有する、請求項1~4のいずれか1項に記載のモータ駆動装置。
- 前記外力付与機構は、前記ファンモータの羽根に対して自動的に接離可能に構成され、前記ファンモータに回転駆動力を付与するように構成されている、請求項5に記載のモータ駆動装置。
- 前記モータ駆動装置は第1のファンモータ及び第2のファンモータを備え、前記外力付与機構は、前記第1のファンモータのトルクを前記第2のファンモータに伝達するように構成されている、請求項5に記載のモータ駆動装置。
- 前記ファンモータを有するファンモータユニットの部材間の結合を所定のタイミングで緩めることで前記ファンモータユニットに振動を与え、前記ファンモータを再起動する手段を有する、請求項1~7のいずれか1項に記載のモータ駆動装置。
- 所定のタイミングで前記ファンモータの汚れを除去することで前記ファンモータを再起動する汚れ除去機構を有する、請求項1~8のいずれか1項に記載のモータ駆動装置。
- 前記汚れ除去機構は、前記ファンモータを加熱する加熱部を有する、請求項9に記載のモータ駆動装置。
- 前記汚れ除去機構は、前記ファンモータに流体を噴射して前記汚れを物理的又は化学的に除去する噴射部を有する、請求項9に記載のモータ駆動装置。
- 前記ファンモータの固着又はその予兆を検知する検知部をさらに有し、前記所定のタイミングは、前記検知部が前記ファンモータの固着又はその予兆を検知したときである、請求項8~11のいずれか1項に記載のモータ駆動装置。
- 前記所定のタイミングは、前記ファンモータを交換又は洗浄してからの前記ファンモータの累積運転時間が所定の値に達したときである、請求項8~11のいずれか1項に記載のモータ駆動装置。
- ファンモータを備えたモータ駆動装置の制御方法であって、
汚れの付着又は堆積によって固着状態の前記ファンモータに対し、前記ファンモータの通常の使用時以下の電流を断続的に流すことで前記ファンモータを再起動することを含む、制御方法。
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PCT/JP2021/016856 WO2022230073A1 (ja) | 2021-04-27 | 2021-04-27 | ファンモータを備えたモータ駆動装置及びモータ駆動装置の制御方法 |
US18/556,289 US20240146215A1 (en) | 2021-04-27 | 2021-04-27 | Motor drive device comprising fan motor and method for controlling motor drive device |
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