JPH04217895A - Operating device for capacitor type single-phase induction motor - Google Patents
Operating device for capacitor type single-phase induction motorInfo
- Publication number
- JPH04217895A JPH04217895A JP2403652A JP40365290A JPH04217895A JP H04217895 A JPH04217895 A JP H04217895A JP 2403652 A JP2403652 A JP 2403652A JP 40365290 A JP40365290 A JP 40365290A JP H04217895 A JPH04217895 A JP H04217895A
- Authority
- JP
- Japan
- Prior art keywords
- phase
- induction motor
- voltage
- power supply
- capacitor
- 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
- 230000006698 induction Effects 0.000 title claims abstract description 60
- 239000003990 capacitor Substances 0.000 title claims abstract description 16
- 238000004804 winding Methods 0.000 claims description 21
- 230000001052 transient effect Effects 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000011084 recovery Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 1
Landscapes
- Control Of Ac Motors In General (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】この発明は電車等に搭載されるコ
ンデンサ形単相誘導電動機において瞬停復電時に過大な
過渡トルクの発生を抑制することができる運転装置に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating device capable of suppressing the generation of excessive transient torque in a capacitor-type single-phase induction motor mounted on a train or the like when power is restored from an instantaneous power failure.
【０００２】0002
【従来の技術】図５は例えば「電気百科事典（昭和５７
年オーム社発行）」等に示されるこの種従来のコンデン
サ形単相誘導電動機の運転装置を示す回路図である。図
において、１はコンデンサ形単相誘導電動機、２はこの
電動機１の一次巻線のうちの第１相巻線（以下、ｄ軸巻
線という）、３は一次巻線のうちの第２相巻線（以下、
ｑ軸巻線という）である。４はｑ軸巻線３に直列に接続
されたコンデンサ、５は降圧トランス、６は電源を取り
入れるパンタグラフ、７は架線であり図示しない単相交
流電源（以下電源という）に接続されている。[Prior Art] Fig. 5 shows, for example, "Encyclopedia of Electricity (1982)".
1 is a circuit diagram illustrating an operating device for a conventional capacitor-type single-phase induction motor of this type, which is disclosed in 2010, published by Ohm Publishing Co., Ltd.). In the figure, 1 is a capacitor-type single-phase induction motor, 2 is the first phase winding of the primary winding of this motor 1 (hereinafter referred to as the d-axis winding), and 3 is the second phase of the primary winding. Winding (hereinafter,
(referred to as q-axis winding). 4 is a capacitor connected in series to the q-axis winding 3, 5 is a step-down transformer, 6 is a pantograph that takes in power, and 7 is an overhead wire connected to a single-phase AC power source (hereinafter referred to as power source) not shown.
【０００３】次に動作について説明する。架線７からの
電圧はパンタグラフ６により取込まれトランス５により
降圧される。この電圧が誘導電動機１に印加されるが、
単相交流電源であるため誘導電動機１には交番磁界しか
できず、回転磁界が形成されない。そのため、回転トル
クが発生しない。そこで、ｄ軸巻線２に印加される電圧
と位相が約９０度ずれた電圧を作るためｑ軸巻線３に直
列にコンデンサ４を接続し誘導電動機１に回転磁界を作
り、単相の交流電源でも回転トルクを発生させるように
したものである。Next, the operation will be explained. The voltage from the overhead line 7 is taken in by the pantograph 6 and stepped down by the transformer 5. This voltage is applied to the induction motor 1,
Since it is a single-phase AC power source, only an alternating magnetic field is generated in the induction motor 1, and no rotating magnetic field is formed. Therefore, no rotational torque is generated. Therefore, in order to create a voltage that is approximately 90 degrees out of phase with the voltage applied to the d-axis winding 2, a capacitor 4 is connected in series with the q-axis winding 3 to create a rotating magnetic field in the induction motor 1, and a single-phase alternating current The power supply also generates rotational torque.
【０００４】このように電動機１にコンデンサ４が接続
されているため、電車が無電圧区間を通過する瞬停時に
は、電動機１の回転エネルギーにより巻線とコンデンサ
との間で電流が流れ、巻線には電圧が発生し続け無電圧
区間通過後の復電時には図６に示すように電圧が逆相で
投入された場合、電動機１に過大な過渡トルクが発生す
ることになる。Since the capacitor 4 is connected to the motor 1 in this way, during an instantaneous power outage when the train passes through a no-voltage section, current flows between the windings and the capacitor due to the rotational energy of the motor 1, causing the windings to If the voltage continues to be generated and the voltage is applied in the opposite phase as shown in FIG. 6 when the power is restored after passing through the no-voltage section, an excessive transient torque will be generated in the motor 1.
【０００５】[0005]
【発明が解決しようとする課題】従来の運転装置は、以
上のように構成されているので、瞬停後の復電時に逆位
相の電圧が印加された場合には過大な過渡トルクが発生
し、軸や、軸に直結された負荷装置等は破壊することが
あった。この発明は上記のような問題点を解消するため
になされたもので、瞬停復電時に過大な過渡トルクの発
生を抑制する運転装置を提供することを目的とする。[Problem to be Solved by the Invention] Since the conventional operating device is configured as described above, excessive transient torque is not generated when a voltage of the opposite phase is applied when power is restored after a momentary power outage. , the shaft and load devices directly connected to the shaft could be destroyed. The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an operating device that suppresses the generation of excessive transient torque when the power is restored from an instantaneous power failure.
【０００６】[0006]
【課題を解決するための手段】この発明に係るコンデン
サ形単相誘導電動機の運転装置は、請求項１においては
、瞬停発生時には単相交流電源から誘導電動機を切り離
すとともに、瞬停の復電時には誘導電動機の端子電圧が
充分に小さくなったことを確認した後、単相交流電源を
誘導電動機に接続するようにしたものであり、又、請求
項２においては、瞬停発生時には単相交流電源から誘導
電動機を切り離すとともに、瞬停の復電時には単相交流
電源側電圧と誘導電動機側電圧との位相差が小さくなっ
たことを確認した後、単相交流電源を誘導電動機に接続
するようにしたものである。[Means for Solving the Problems] According to claim 1, an operating device for a capacitor-type single-phase induction motor according to the present invention disconnects the induction motor from the single-phase AC power supply when an instantaneous power outage occurs, and restores the power after the instantaneous power outage. Sometimes, after confirming that the terminal voltage of the induction motor has become sufficiently small, a single-phase AC power source is connected to the induction motor. In addition to disconnecting the induction motor from the power supply, after confirming that the phase difference between the voltage on the single-phase AC power supply side and the voltage on the induction motor side has become small when the power is restored after a momentary power outage, connect the single-phase AC power supply to the induction motor. This is what I did.
【０００７】[0007]
【作用】この発明におけるコンデンサ形単相誘導電動機
の運転装置の制御手段は、瞬停の復電時には誘導電動機
の端子電圧が充分小さくなったことを確認した後、又、
単相交流電源側電圧と誘導電動機側電圧との位相差が小
さくなったことを確認した後、それぞれ単相交流電源を
誘導電動機に接続することにより、復電時に過大な過渡
トルクが発生するのを防止する。[Operation] The control means of the operating device for the capacitor-type single-phase induction motor according to the present invention, upon power restoration after an instantaneous power failure, after confirming that the terminal voltage of the induction motor has become sufficiently small,
After confirming that the phase difference between the voltage on the single-phase AC power supply side and the voltage on the induction motor side has become small, connect each single-phase AC power supply to the induction motor to prevent excessive transient torque from occurring when power is restored. prevent.
【０００８】[0008]
【実施例】以下、この発明の一実施例を図について説明
する。図１はこの発明の一実施例におけるコンデンサ形
単相誘導電動機の運転装置を示す回路図である。図にお
いて、コンデンサ形単相誘導電動機１，第１相巻線２，
第２相巻線３，コンデンサ４，降圧トランス５，パンタ
グラフ６および単相交流電源７は図５における従来装置
のものと同様である。８はコンデンサ形単相誘導電動機
１と単相交流電源７との間の接続を開閉する開閉器、９
は単相交流電源７側の電圧を検出する電圧センサ９ａお
よびコンデンサ形単相誘導電動機１側の電圧を検出する
電圧センサ９ｂを有する制御手段で、電圧センサ９ａで
検出される電圧が零の時、すなわち、瞬停時には開閉器
８を開に、又、瞬停の復電時には電圧センサ９ｂで検出
される電圧が充分に小さくなった時点で開閉器８を閉に
それぞれ制御する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit diagram showing an operating device for a capacitor-type single-phase induction motor according to an embodiment of the present invention. In the figure, a capacitor type single-phase induction motor 1, a first phase winding 2,
The second phase winding 3, capacitor 4, step-down transformer 5, pantograph 6, and single-phase AC power source 7 are the same as those in the conventional device shown in FIG. 8 is a switch for opening and closing the connection between the capacitor-type single-phase induction motor 1 and the single-phase AC power supply 7;
is a control means having a voltage sensor 9a that detects the voltage on the single-phase AC power supply 7 side and a voltage sensor 9b that detects the voltage on the capacitor type single-phase induction motor 1 side, and when the voltage detected by the voltage sensor 9a is zero, That is, the switch 8 is controlled to be opened during a momentary power outage, and the switch 8 is controlled to be closed when the voltage detected by the voltage sensor 9b becomes sufficiently small when the power is restored from a momentary power failure.
【０００９】次に、上記のように構成されたこの発明の
一実施例におけるコンデンサ形単相誘導電動機の運転装
置の動作について説明する。まず、パンタグラフ６に単
相交流電源７から電圧が印加されなくなる瞬停発生時に
は、電圧センサ９ａで図２（Ａ）に示すように電源電圧
が零であることを検出し、制御手段９は開閉器８を開に
制御して単相交流電源７からコンデンサ形単相誘導電動
機１を切り離す。一方、この時に電圧センサ９ｂで検出
される電動機側には、図２（Ｂ）に示すようにコンデン
サ４があるための残留電圧が存在している。Next, the operation of the operating device for a capacitor-type single-phase induction motor according to an embodiment of the present invention constructed as described above will be explained. First, when an instantaneous power failure occurs in which no voltage is applied to the pantograph 6 from the single-phase AC power supply 7, the voltage sensor 9a detects that the power supply voltage is zero as shown in FIG. The capacitor-type single-phase induction motor 1 is disconnected from the single-phase AC power supply 7 by controlling the switch 8 to open. On the other hand, at this time, a residual voltage exists on the motor side detected by the voltage sensor 9b due to the presence of the capacitor 4, as shown in FIG. 2(B).
【００１０】次に、電圧が回復する復電時には、電圧セ
ンサ９ｂで検出される電圧、すなわち残留電圧が充分に
小さくなった時点で、制御手段９は開閉器８を閉に制御
して、単相交流電源７をコンデンサ形単相誘導電動機１
に接続する。このように、復電時には開閉器８を即時閉
にするのではなく、残留電圧が充分に小さくなった時点
で閉にしているので、過大な過渡トルクが発生すること
もなく電動機の運転が再開できる。Next, at the time of power restoration when the voltage is restored, the control means 9 controls the switch 8 to close when the voltage detected by the voltage sensor 9b, that is, the residual voltage becomes sufficiently small. Phase AC power supply 7 is a capacitor type single-phase induction motor 1
Connect to. In this way, when the power is restored, the switch 8 is not closed immediately, but is closed as soon as the residual voltage becomes sufficiently low, so the motor can resume operation without excessive transient torque. can.
【００１１】図３はこの発明の他の実施例におけるコン
デンサ形単相誘導電動機の運転装置を示す回路図である
。図において、コンデンサ形単相誘導電動機１，第１相
巻線２，第２相巻線３，コンデンサ４，降圧トランス５
，パンタグラフ６，単相交流電源７および開閉器８は図
５における従来装置のものと同様である。１０は単相交
流電源７側の電圧を検出する電圧センサ１０ａ および
コンデンサ形単相誘導電動機１側の電圧を検出する電圧
センサ１０ｂ を有する制御手段で、電圧センサ１０ａ
で検出される電圧が零の時、すなわち、瞬停時には開
閉器８を開に、又、瞬停の復電時には両電圧センサ１０
ａ ，１０ｂ で検出されるそれぞれの電圧の位相差が
小さくなった時点で開閉器８を閉にそれぞれ制御する。FIG. 3 is a circuit diagram showing a driving device for a capacitor-type single-phase induction motor according to another embodiment of the present invention. In the figure, a capacitor-type single-phase induction motor 1, a first phase winding 2, a second phase winding 3, a capacitor 4, and a step-down transformer 5
, pantograph 6, single-phase AC power source 7, and switch 8 are the same as those of the conventional device shown in FIG. Reference numeral 10 denotes a control means having a voltage sensor 10a for detecting the voltage on the single-phase AC power supply 7 side and a voltage sensor 10b for detecting the voltage on the capacitor-type single-phase induction motor 1 side.
When the voltage detected at
When the phase difference between the voltages detected at a and 10b becomes small, the switch 8 is controlled to close.
【００１２】次に、上記のように構成されたこの発明の
他の実施例におけるコンデンサ形単相誘導電動機の運転
装置の動作について説明する。まず、上記一実施例と同
様にパンタグラフ６に単相交流電源７から電圧が印加さ
れなくなる瞬停発生時には、電圧センサ１０ａ で第４
（Ａ）に示すように電源電圧が零であることを検出し、
制御手段１０は開閉器８を開に制御して単相交流電源７
からコンデンサ形単相誘導電動機１を切り離す。一方、
この時に電圧センサ１０ｂ で検出される電動機側には
、第４（Ｂ）に示すようにコンデンサ４があるための残
留電圧が存在している。Next, the operation of a capacitor-type single-phase induction motor operating device according to another embodiment of the present invention constructed as described above will be explained. First, in the same way as in the above-mentioned embodiment, when a momentary power failure occurs in which no voltage is applied to the pantograph 6 from the single-phase AC power source 7, the voltage sensor 10a
As shown in (A), it is detected that the power supply voltage is zero,
The control means 10 controls the switch 8 to open so that the single-phase AC power source 7
The capacitor-type single-phase induction motor 1 is separated from the capacitor-type single-phase induction motor 1. on the other hand,
At this time, a residual voltage exists on the motor side detected by the voltage sensor 10b due to the presence of the capacitor 4, as shown in the fourth (B).
【００１３】次に、電圧が回復する復電時には、両電圧
センサ１０ａ ，１０ｂ で検出されるそれぞれの電圧
の位相差が小さくなった時点で、制御手段１０は開閉器
８を閉に制御して、単相交流電源７をコンデンサ形単相
誘導電動機１に接続する。このように、復電時には開閉
器８を即時閉にするのではなく、電源側および電動機側
両電圧の位相差が小さくなった時点で閉にしているので
、過大な過渡トルクが発生することもなく電動機の運転
が再開できる。Next, at the time of power restoration when the voltage is restored, the control means 10 controls the switch 8 to close when the phase difference between the respective voltages detected by both voltage sensors 10a and 10b becomes small. , a single-phase AC power source 7 is connected to a capacitor-type single-phase induction motor 1. In this way, when the power is restored, the switch 8 is not closed immediately, but when the phase difference between the voltages on the power supply side and the motor side becomes small, so that excessive transient torque may occur. The motor can resume operation without any problems.
【００１４】尚、上記各実施例は電車に搭載されたコン
デンサ形単相誘導電動機について説明したが、これに限
定されるものではなく他の機器にも適用できることは言
うまでもない。Although each of the above embodiments has been described with respect to a capacitor-type single-phase induction motor mounted on a train, it goes without saying that the present invention is not limited to this and can be applied to other devices.
【００１５】[0015]
【発明の効果】以上のように、この発明の請求項１によ
れば瞬停発生時には単相交流電源から誘導電動機を切り
離すとともに、瞬停の復電器には誘導電動機の端子電圧
が充分に小さくなったことを確認した後、単相交流電源
を誘導電動機に接続するようにし、又、請求項２によれ
ば瞬停発生時には単相交流電源から誘導電動機を切り離
すとともに、瞬停の復電時には単相交流電源側電圧と誘
導電動機側電圧との位相差が小さくなったことを確認し
た後、単相交流電源を誘導電動機に接続するようにした
ので、瞬停復電時に過大な過渡トルクの発生を抑制し得
るコンデンサ形単相誘導電動機の運転装置を提供するこ
とができる。As described above, according to claim 1 of the present invention, when an instantaneous power outage occurs, the induction motor is disconnected from the single-phase AC power supply, and the terminal voltage of the induction motor is sufficiently small to be used as a restorer for the instantaneous power outage. After confirming that the current condition has occurred, the single-phase AC power source is connected to the induction motor, and according to claim 2, when a momentary power outage occurs, the induction motor is disconnected from the single-phase AC power source, and when the momentary power failure is restored, the induction motor is disconnected from the single-phase AC power source. After confirming that the phase difference between the voltage on the single-phase AC power supply side and the voltage on the induction motor side had become small, we connected the single-phase AC power supply to the induction motor, which prevents excessive transient torque from occurring when power is restored from a momentary power failure. It is possible to provide an operating device for a capacitor-type single-phase induction motor that can suppress the occurrence of such occurrence.
【図１】この発明の一実施例におけるコンデンサ形単相
誘導電動機の運転装置の構成を示す回路図である。FIG. 1 is a circuit diagram showing the configuration of an operating device for a capacitor-type single-phase induction motor in an embodiment of the present invention.
【図２】図１における運転装置の要部を構成する制御手
段によって検出される瞬停復電時における電圧をそれぞ
れ示す図で、（Ａ）は電源側電圧、（Ｂ）は電動機側電
圧である。[Fig. 2] Diagrams showing the voltages detected by the control means constituting the main part of the operating device in Fig. 1 at the time of power recovery from an instantaneous power failure, where (A) is the voltage on the power supply side and (B) is the voltage on the motor side. be.
【図３】この発明の他の実施例におけるコンデンサ形単
相誘導電動機の運転装置である。FIG. 3 is an operating device for a capacitor-type single-phase induction motor in another embodiment of the present invention.
【図４】図３における運転装置の要部を構成する制御手
段によって検出される瞬停復電時における電圧をそれぞ
れ示す図で、（Ａ）は電源側電圧、（Ｂ）は電動機側電
圧をそれぞれ示す。FIG. 4 is a diagram showing the voltages detected by the control means constituting the main part of the operating device in FIG. 3 at the time of power recovery from an instantaneous power failure, in which (A) shows the voltage on the power supply side and (B) shows the voltage on the motor side. Each is shown below.
【図５】従来のコンデンサ形単相誘導電動機の運転装置
の構成を示す回路図である。FIG. 5 is a circuit diagram showing the configuration of a conventional capacitor-type single-phase induction motor operating device.
【図６】図５における従来の運転装置での瞬停復電時の
電圧および電動機トルクを示す図で、（Ａ）は電圧、（
Ｂ）は電動機トルクをそれぞれ示す。FIG. 6 is a diagram showing the voltage and motor torque at the time of power recovery from instantaneous power failure in the conventional operating device in FIG. 5, where (A) is the voltage;
B) shows the electric motor torque.
１はコンデンサ形単相誘導電動機、７は単相交流電源、
８は開閉器、９，１０は制御手段である。1 is a capacitor type single-phase induction motor, 7 is a single-phase AC power supply,
8 is a switch, and 9 and 10 are control means.
Claims (2)
１相巻線および第２相巻線と、この第２相巻線と直列に
接続されたコンデンサとからなる誘導電動機、上記単相
交流電源と上記誘導電動機との間の接続を開閉する開閉
器、瞬停発生時には上記開閉器を開にして上記単相交流
電源から上記誘導電動機を切り離すとともに上記瞬停の
復電時には上記誘導電動機の端子電圧が充分に小さくな
ったことを確認し且つ上記開閉器を閉にして上記単相交
流電源を上記誘導電動機に接続する制御手段を備えたこ
とを特徴とするコンデンサ形単相誘導電動機の運転装置
。1. An induction motor comprising a first phase winding and a second phase winding each connected to a single-phase AC power supply, and a capacitor connected in series with the second phase winding, the single-phase AC A switch that opens and closes the connection between the power supply and the induction motor.When a momentary power outage occurs, the switch opens to disconnect the induction motor from the single-phase AC power supply, and when the power is restored after the momentary power outage, the induction motor is disconnected. Operation of a capacitor-type single-phase induction motor characterized by comprising control means for confirming that the terminal voltage has become sufficiently low and closing the switch to connect the single-phase AC power source to the induction motor. Device.
１相巻線および第２相巻線と、この第２相巻線と直列に
接続されたコンデンサとからなる誘導電動機、上記単相
交流電源と上記誘導電動機との間の接続を開閉する開閉
器、瞬停発生時には上記開閉器を開にして上記単相交流
電源から上記誘導電動機を切り離すとともに上記瞬停の
復電時には上記単相交流電源側電圧と上記誘導電動機側
電圧との位相差が小さくなったことを確認し且つ上記開
閉器を閉にして上記単相交流電源を上記誘導電動機に接
続する制御手段を備えたことを特徴とするコンデンサ形
単相誘導電動機の運転装置。2. An induction motor comprising a first phase winding and a second phase winding each connected to a single-phase AC power source, and a capacitor connected in series with the second phase winding, the single-phase AC A switch that opens and closes the connection between the power supply and the induction motor, and when a momentary power outage occurs, the switch opens to disconnect the induction motor from the single-phase AC power supply, and when the power is restored after the momentary power outage, the switch returns to the single-phase AC power supply. It is characterized by comprising a control means for confirming that the phase difference between the voltage on the power supply side and the voltage on the induction motor side has become small, and closing the switch to connect the single-phase AC power source to the induction motor. A driving device for a capacitor-type single-phase induction motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2403652A JPH04217895A (en) | 1990-12-19 | 1990-12-19 | Operating device for capacitor type single-phase induction motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2403652A JPH04217895A (en) | 1990-12-19 | 1990-12-19 | Operating device for capacitor type single-phase induction motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04217895A true JPH04217895A (en) | 1992-08-07 |
Family
ID=18513381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2403652A Pending JPH04217895A (en) | 1990-12-19 | 1990-12-19 | Operating device for capacitor type single-phase induction motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04217895A (en) |
-
1990
- 1990-12-19 JP JP2403652A patent/JPH04217895A/en active Pending
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