JPS5846896A - Operating method for motor - Google Patents
Operating method for motorInfo
- Publication number
- JPS5846896A JPS5846896A JP56143826A JP14382681A JPS5846896A JP S5846896 A JPS5846896 A JP S5846896A JP 56143826 A JP56143826 A JP 56143826A JP 14382681 A JP14382681 A JP 14382681A JP S5846896 A JPS5846896 A JP S5846896A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- field
- field winding
- resistor
- operated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/60—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling combinations of dc and ac dynamo-electric motors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Multiple Motors (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、電動機の運転方法に係り、特に、交流電動機
による運転が行なえないとき、直流電動機による運転を
行なう電動機の運転方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of operating an electric motor, and particularly to a method of operating an electric motor in which operation is performed using a DC motor when operation using an AC motor is not possible.
一般に、プラント運用上重要な補機を運転するためのシ
ステムにおいて、交流電源喪失時等の後備保護のため交
流電動機の他に直流電動機を備えていることが多い。す
なわ、ち、この種のシステムパにおいてへ通常の運転時
には交流電動機による運転を行ない、交流電動機に何ら
かの異常が発生し交流電動機による運転が行なえないと
きは、直流電動機による運転を行ない補機の継続運転を
確保している。Generally, in systems for operating auxiliary equipment important for plant operation, a DC motor is often included in addition to the AC motor for backup protection in the event of a loss of AC power. In other words, in this type of system, the AC motor is used during normal operation, and when some abnormality occurs in the AC motor and the AC motor cannot be used, the DC motor is used to operate the auxiliary equipment. Continuous operation is ensured.
とぐろが、交流電動機と直流電動機が同一の駆動軸で連
結されているので、交流電動機運転中は直流電動機も回
転することになる。そのため、直流電動機は残留磁界に
よって端子間に電圧を発生し、発電機となって作用する
。この結果、交流電動機運転中は直流電動機の起動用抵
抗、及び界磁抵抗に電流が流れ、直流電動機が過熱させ
られるという欠点があった。Since the coil is connected to the AC motor and the DC motor by the same drive shaft, the DC motor also rotates while the AC motor is operating. Therefore, the DC motor generates a voltage between its terminals due to the residual magnetic field, and acts as a generator. As a result, while the AC motor is in operation, current flows through the starting resistance and field resistance of the DC motor, causing the DC motor to overheat.
本発明は前記課題に鑑みなされたもので、その目的は交
流電動機運転中における直流電動機の過熱を防止するこ
とができる電動機の運転方法を提供するととにある。The present invention has been made in view of the above problems, and its purpose is to provide a method of operating an electric motor that can prevent overheating of a DC motor during operation of an AC motor.
前記目的を達成するために本発明は、直流電動機による
運転以外は直流電動機の界磁巻線を短絡しておくことを
特徴とする。In order to achieve the above object, the present invention is characterized in that the field winding of the DC motor is short-circuited except when the DC motor is operating.
以下、図面に基づいて本発明の好適な実施例を説明する
。Hereinafter, preferred embodiments of the present invention will be described based on the drawings.
第１図には、本発明を適用したシステムの構成図が示さ
れている。第１図において、補機１を交流電動機２と直
流電動機３のいずれによっても駆動できるように、交流
電動機２と直流電動機３の回転軸が同一の駆動軸４に連
結され、交流電動機２と直流電動機３がタンデムに配置
されている。FIG. 1 shows a configuration diagram of a system to which the present invention is applied. In FIG. 1, the rotating shafts of the AC motor 2 and the DC motor 3 are connected to the same drive shaft 4 so that the auxiliary machine 1 can be driven by either the AC motor 2 or the DC motor 3. Electric motors 3 are arranged in tandem.
又交流電動機２と直流電動機３はそれぞれ電動機の運転
等を制御する制御部５に接続されている。Further, the AC motor 2 and the DC motor 3 are each connected to a control section 5 that controls the operation of the motors.
そして、通常の運転時には制御部５からの制御指令によ
り交流電動機２が駆動され、交流電動機による運転が行
えない場合は、直流電動機３が駆動される。従って、交
流電動機２に異常が発生し交流電動機による運転が行え
ないときには、直流電動機３によって補機１が運転され
るので補機１の継続運転を確保できる。During normal operation, the AC motor 2 is driven by a control command from the control unit 5, and when the AC motor cannot operate, the DC motor 3 is driven. Therefore, when an abnormality occurs in the AC motor 2 and operation by the AC motor cannot be performed, the auxiliary machine 1 is operated by the DC motor 3, so that continuous operation of the auxiliary machine 1 can be ensured.
ところで、交流電動機２の運転時に直流電動機３が回転
することによって、直流電動機３に電圧が発生するのを
防止する必要がある。すなわち、交流電動機２による運
転が行なわれると、第２図に示される如く、直流電動機
３の電機子巻線１１が外力によって回転させられ、界磁
巻線１２の残留磁束によって直流電動機２に電圧が発生
し、その電圧によって電機子巻線１１、起動用抵抗１３
、界磁弾抗１４１、界磁巻線１２からなるループに電流
が流れ、起動用抵抗１３と界磁抵抗１４が過熱されるこ
とになる。By the way, it is necessary to prevent voltage from being generated in the DC motor 3 due to rotation of the DC motor 3 when the AC motor 2 is operated. That is, when the AC motor 2 is operated, the armature winding 11 of the DC motor 3 is rotated by an external force as shown in FIG. occurs, and the voltage causes the armature winding 11 and the starting resistor 13 to
, the field elastic resistor 141, and the field winding 12. A current flows through the loop consisting of the field elastic resistor 141 and the field winding 12, and the starting resistor 13 and the field resistor 14 are overheated.
そこで、本実施例においては、界磁巻線１２と並列に電
動機駆動用開閉器の補助接点１５を設は一直流電動機に
よる運転以外は、制御部５からの制御指令に°より補助
接点１５が閉じるようになっている。従って、交流電動
機２による運転時には直流電動機３の界磁）線１２が補
助接点１５によって短絡さ、れるので、界磁巻線１２の
残留磁束が除去され、直流電動機に電圧が発生するのを
防止できる。そのため、起動用抵抗１３、界磁抵抗１４
に電流が流れるのを防止できるので、起動用抵抗１３と
界磁抵抗１４の過熱を防止できる。Therefore, in this embodiment, the auxiliary contact 15 of the motor drive switch is installed in parallel with the field winding 12. It is supposed to close. Therefore, when the AC motor 2 is operated, the field wire 12 of the DC motor 3 is short-circuited by the auxiliary contact 15, so that the residual magnetic flux of the field winding 12 is removed and voltage is prevented from being generated in the DC motor. can. Therefore, starting resistor 13, field resistor 14
Since it is possible to prevent current from flowing through the starting resistor 13 and the field resistor 14, overheating of the starting resistor 13 and the field resistor 14 can be prevented.
また、本実施例によれば、交流電動機による運転時には
直流電動機の残留磁束が除去されるので、直流電動機の
発電機化を防止できる。Further, according to this embodiment, the residual magnetic flux of the DC motor is removed when the AC motor is operated, so that it is possible to prevent the DC motor from becoming a generator.
以上説明したように、本発明によれば、交流電動機の運
転時における直流電動機の過熱を防止できるという優れ
た効果がある。 −As explained above, according to the present invention, there is an excellent effect that overheating of the DC motor can be prevented during operation of the AC motor. −
第１図は、本発明方法を適用したシステムの一実施例を
示す構成図、第２図は、第１図に示されているシステム
に用いられる直流電動機の回路図である。FIG. 1 is a block diagram showing an embodiment of a system to which the method of the present invention is applied, and FIG. 2 is a circuit diagram of a DC motor used in the system shown in FIG.
Claims (1)
、通常の運転時には交流電動機による運転−を行ない、
交流電動機による運転が行なえないときには直流電動機
による運転を行なう電動機の運転方法において、直流電
動機による運転以外は直流電動機の界磁巻線を短絡して
おくことを特徴とする電動機の運転方法。1. An AC motor and a DC motor are connected to the same drive shaft, and the AC motor is used during normal operation.
A method for operating an electric motor in which operation is performed using a DC motor when operation using an AC motor is not possible, characterized in that a field winding of the DC motor is short-circuited except for operation using the DC motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56143826A JPS5846896A (en) | 1981-09-14 | 1981-09-14 | Operating method for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56143826A JPS5846896A (en) | 1981-09-14 | 1981-09-14 | Operating method for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5846896A true JPS5846896A (en) | 1983-03-18 |
Family
ID=15347845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56143826A Pending JPS5846896A (en) | 1981-09-14 | 1981-09-14 | Operating method for motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5846896A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59191841A (en) * | 1983-04-14 | 1984-10-31 | Takaoka Ind Ltd | Air conditioning system using solar ray generation and system power jointly |
| WO2013021460A1 (en) * | 2011-08-09 | 2013-02-14 | トヨタ自動車株式会社 | Vehicle and method of controlling vehicle |
-
1981
- 1981-09-14 JP JP56143826A patent/JPS5846896A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59191841A (en) * | 1983-04-14 | 1984-10-31 | Takaoka Ind Ltd | Air conditioning system using solar ray generation and system power jointly |
| JPH0366577B2 (en) * | 1983-04-14 | 1991-10-17 | Takaoka Electric Mfg Co Ltd | |
| WO2013021460A1 (en) * | 2011-08-09 | 2013-02-14 | トヨタ自動車株式会社 | Vehicle and method of controlling vehicle |
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