JPH04248382A - Starter for a plurality of motors different in capacity - Google Patents
Starter for a plurality of motors different in capacityInfo
- Publication number
- JPH04248382A JPH04248382A JP915796A JP579691A JPH04248382A JP H04248382 A JPH04248382 A JP H04248382A JP 915796 A JP915796 A JP 915796A JP 579691 A JP579691 A JP 579691A JP H04248382 A JPH04248382 A JP H04248382A
- Authority
- JP
- Japan
- Prior art keywords
- starting
- capacity
- inverter
- motor
- motors
- 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
- 239000007858 starting material Substances 0.000 title description 7
- 238000010586 diagram Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Motor And Converter Starters (AREA)
Abstract
Description
【0001】0001
【産業上の利用分野】この発明は、容量の異なる複数の
電動機の始動装置、とくに負荷の慣性モーメントが大き
い容量の異なる複数の電動機に適した始動装置に関する
。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a starting device for a plurality of electric motors of different capacities, and particularly to a starting device suitable for a plurality of electric motors of different capacities whose loads have a large moment of inertia.
【0002】0002
【従来の技術】製造装置などの各種装置には容量の異な
る複数の電動機を使用したものが多いが、このような複
数の電動機の始動は、従来、各電動機にそれぞれ始動器
を設けて行なっている。[Prior Art] Various types of equipment, such as manufacturing equipment, often use multiple electric motors with different capacities. Conventionally, starting these multiple electric motors has been carried out by providing a starter for each electric motor. There is.
【0003】また、この種の電動機においては負荷の定
常状態は小さくても慣性モーメントが大きい場合が多く
、このような場合、従来は、始動時を考慮して電動機の
容量を大きくするか、または定常状態の負荷に見合った
電動機に保護継電器などを接続せずに大電流を流して始
動している。Furthermore, in this type of motor, the moment of inertia is often large even if the steady state of the load is small. In such cases, conventionally, the capacity of the motor has been increased or The motor is started by flowing a large current without connecting a protective relay or the like to the motor that is suitable for the steady-state load.
【0004】0004
【発明が解決しようとする課題】ところが、定常状態の
負荷に比べて電動機の容量を大きくすると、始動器の容
量も大きくなり、これらの価格が高くなる。そして、定
常状態が小さくて慣性モーメントが大きい負荷の場合、
定常運転時には電動機の容量に比べて負荷が小さいので
、不経済である。However, when the capacity of the motor is increased compared to the load in a steady state, the capacity of the starter also becomes large, which increases the cost of these starters. And for a load with a small steady state and a large moment of inertia,
During steady operation, the load is small compared to the capacity of the motor, so it is uneconomical.
【0005】また、各電動機に始動器がそれぞれ必要で
、不経済であり、従来の始動器は電圧制御のものが多く
、この場合、始動時に定格電流の5倍程度の大きい電流
が流れる。このため、始動時の騒音が大きく、始動、停
止の繰返しにより電動機の寿命が短くなる。とくに定常
状態の負荷に見合った電動機に保護継電器などを接続せ
ずに大電流を流して始動する場合、このような大電流に
よる問題が著しい。Furthermore, each electric motor requires a starter, which is uneconomical, and most conventional starters are voltage controlled, in which case a large current of about five times the rated current flows during starting. Therefore, the noise at the time of starting is large, and the life of the motor is shortened due to repeated starting and stopping. In particular, when starting a motor by passing a large current through it without connecting a protective relay or the like to a motor suitable for a steady-state load, problems caused by such a large current are significant.
【0006】このような理由から、従来は、電動機の始
動、停止を頻繁に行なうことができず、電動機を長時間
連続運転することが多く、不要な電力を消費し、ランニ
ングコストが高いという問題があった。For these reasons, in the past, it was not possible to start and stop the electric motor frequently, and the electric motor was often operated continuously for long periods of time, resulting in unnecessary power consumption and high running costs. was there.
【0007】この発明の目的は、上記の問題をすべて解
決した容量の異なる複数の電動機の始動装置を提供する
ことにある。An object of the present invention is to provide a starting device for a plurality of electric motors having different capacities, which solves all of the above problems.
【0008】[0008]
【課題を解決するための手段】この発明による始動装置
は、1つのインバータ、容量の異なる複数の電動機と上
記インバータおよび商用電源線との間に設けられた切換
回路、ならびに上記各電動機を始動時には上記インバー
タに接続し始動完了後に上記商用電源線に接続するよう
に上記切換回路を制御する始動制御手段を備えており、
上記インバータの容量が最も大きい電動機の容量に基づ
いて定められ、上記インバータの始動特性が容量に対す
る負荷の慣性モーメントの最も大きい電動機の容量と負
荷の関係に基づいて定められているものである。[Means for Solving the Problems] A starting device according to the present invention includes a switching circuit provided between one inverter, a plurality of electric motors having different capacities, the inverter and a commercial power line, and a switching circuit that switches each of the electric motors at the time of starting. A start control means is provided that connects to the inverter and controls the switching circuit so as to connect to the commercial power line after the start is completed,
The capacity of the inverter is determined based on the capacity of the largest motor, and the starting characteristics of the inverter are determined based on the relationship between the capacity of the motor and the load, which has the largest moment of inertia of the load relative to the capacity.
【0009】[0009]
【作用】切換回路および始動制御手段により、各電動機
は、始動時にはインバータに接続されてこれにより始動
され、始動完了後は商用電源に切換えられてこれにより
運転される。そして、インバータの容量が最も大きい電
動機の容量に基づいて定められ、インバータの始動特性
が容量に対する負荷の慣性モーメントの最も大きい電動
機の容量と負荷の関係に基づいて定められているので、
負荷の慣性モーメントが大きい容量の異なる複数の電動
機を1つのインバータで始動することができる。[Operation] By means of the switching circuit and the starting control means, each electric motor is connected to the inverter and started by the inverter at the time of starting, and after the starting is completed, it is switched to the commercial power source and operated thereby. The capacity of the inverter is determined based on the capacity of the motor with the largest capacity, and the starting characteristics of the inverter are determined based on the relationship between the capacity of the motor with the largest moment of inertia of the load relative to capacity and the load.
A single inverter can start a plurality of electric motors of different capacities with a large load moment of inertia.
【0010】各電動機をインバータで始動するので、各
電動機をそれぞれの定常状態の負荷に見合った容量のも
のにすることができ、電動機の容量を小さくすることが
できる。また、始動電流を定格電流の1.2倍以下と小
さくすることができ、始動時に大電流が流れることがな
い。Since each electric motor is started by an inverter, each electric motor can have a capacity commensurate with its steady state load, and the capacity of the electric motor can be reduced. Further, the starting current can be reduced to 1.2 times or less of the rated current, and a large current does not flow during starting.
【0011】[0011]
【実施例】以下、図面を参照して、この発明の実施例に
ついて説明する。Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.
【0012】図1は4つの電動機(M1)(M2)(M
3)(M4)の始動装置の全体概略構成を示し、図2は
その要部を詳細に示している。FIG. 1 shows four electric motors (M1) (M2) (M
3) (M4) The overall schematic configuration of the starter device is shown, and FIG. 2 shows its main parts in detail.
【0013】4つの電動機(M1)〜(M4)の容量お
よび負荷の慣性モーメントに相当するGD2は、次のと
おりである。なお、各電動機(M1)〜(M4)の容量
は、定常運転時の負荷により決定されている。The capacities of the four electric motors (M1) to (M4) and GD2 corresponding to the moment of inertia of the load are as follows. Note that the capacity of each electric motor (M1) to (M4) is determined by the load during steady operation.
【0014】
容量[kW] GD2[kg・m2]
第1電動機(M1) 200
760 第2電
動機(M2) 160
145 第3電動機(M3)
55 35
0 第4電動機(M4)
55 350
始動装置は、インバータ(10)、切換回路(11)お
よび始動制御手段としての始動制御回路(12)より構
成されている。[0014]
Capacity [kW] GD2 [kg・m2]
First electric motor (M1) 200
760 Second electric motor (M2) 160
145 Third electric motor (M3)
55 35
0 4th electric motor (M4)
55 350
The starting device includes an inverter (10), a switching circuit (11), and a starting control circuit (12) as starting control means.
【0015】インバータ(10)は、定格遮断電流60
0Aの遮断器(13)を介して400V商用電源線(1
4)に接続されている。この商用電源線(14)は、変
圧器(15)を介して6600V電源線(16)に接続
されている。インバータ(10)の容量は最も大きい第
1電動機(M1)の容量200kWを考慮して決定され
ており、300kVAである。また、インバータ(10
)の始動特性は、容量に対する負荷の慣性モーメントの
最も大きい第3および第4電動機(M3)(M4)の容
量と負荷の関係に基づいて定められている切換回路(1
1)は、それぞれ4つの始動用電磁開閉器の接点(始動
用接点)(1a)(1b)(1c)(1d)、始動用過
負荷継電器(2a)(2b)(2c)(2d)、定常運
転用電磁開閉器の接点(定常運転用接点)(3a)(3
b)(3c)(3d)、定常運転用過負荷継電器(4a
)(4b)(4c)(4d)および遮断器(5a)(5
b)(5c)(5d)を備えている。そして、各電動機
(M1)〜(M4)が、それぞれ、始動用過負荷継電器
(2a)〜(2d)および始動用接点(1a)〜(1d
)を介してインバータ(10)に接続されるとともに、
定常運転用過負荷継電器(4a)〜(4d)、定常運転
用接点(3a)〜(3d)および遮断器(5a)〜(5
d)を介して商用電源線(14)に接続されている。[0015] The inverter (10) has a rated breaking current of 60
400V commercial power line (1) via 0A circuit breaker (13)
4) is connected to. This commercial power line (14) is connected to a 6600V power line (16) via a transformer (15). The capacity of the inverter (10) is determined in consideration of the capacity of the largest first electric motor (M1), 200 kW, and is 300 kVA. In addition, an inverter (10
) The starting characteristics of the switching circuit (1
1) are four starting electromagnetic switch contacts (starting contacts) (1a) (1b) (1c) (1d), starting overload relays (2a) (2b) (2c) (2d), Contact of electromagnetic switch for steady operation (contact for steady operation) (3a) (3
b) (3c) (3d), overload relay for steady operation (4a
) (4b) (4c) (4d) and circuit breakers (5a) (5
b) (5c) (5d). Each electric motor (M1) to (M4) is connected to a starting overload relay (2a) to (2d) and a starting contact (1a) to (1d), respectively.
) is connected to the inverter (10) via
Overload relays (4a) to (4d) for steady operation, contacts (3a) to (3d) for steady operation, and circuit breakers (5a) to (5
d) to the commercial power line (14).
【0016】第1および第2遮断器(5a)(5b)の
定格遮断電流は600A、第3および第4遮断器(5c
)(5d)のそれは225Aである。また、各過負荷継
電器(2a)〜(2d)(4a)〜(4d)の感度は対
応する電動機(M1)〜(M4)の定格電流に合うよう
に定められており、これにより電動機(M1)〜(M4
)の保護が図られている。The rated breaking current of the first and second circuit breakers (5a) (5b) is 600A, and the rated breaking current of the third and fourth circuit breakers (5c
)(5d) is 225A. In addition, the sensitivity of each overload relay (2a) to (2d) (4a) to (4d) is determined to match the rated current of the corresponding electric motor (M1) to (M4). ) ~ (M4
) is protected.
【0017】図示は省略したが、始動制御回路(12)
は上記始動用電磁開閉器、定常運転用電磁開閉器などを
含んでおり、これには各電動機(M1)〜(M4)を個
別に起動するための手動起動スイッチ、4つの電動機(
M1)〜(M4)を自動的に起動するための自動起動ス
イッチなどが接続されている。Although not shown, the starting control circuit (12)
includes the above-mentioned electromagnetic switch for starting, electromagnetic switch for steady operation, etc., including a manual start switch for starting each motor (M1) to (M4) individually, and a switch for starting the four motors (
An automatic start switch and the like for automatically starting M1) to (M4) are connected.
【0018】始動制御回路(12)は、次のように、切
換回路(11)を制御することにより電動機(M1)〜
(M4)の始動を行なう。The starting control circuit (12) controls the electric motors (M1) to 1 by controlling the switching circuit (11) as follows.
(M4) is started.
【0019】手動起動スイッチから第1電動機(M1)
の起動指令が入力すると、まず、第1始動用接点(1a
)を閉じ、インバータ(10)によって第1電動機(M
1)を始動させる。これより所定時間経過して第1電動
機(M1)の始動が完了すると、第1始動用接点(1a
)を開いて、第1電動機(M1)をインバータ(10)
から切離し、残留電圧の影響を防ぐために3秒程度経過
してから第1定常運転用接点(3a)を閉じ、第1電動
機(M1)を商用電源線(14)に接続して、商用電源
による定常運転に切換える。なお、このときに第1始動
用接点(1a)と第1定常運転用接点(3a)が同時に
閉じないように、インターロックが設けられている。ま
た、第1電動機(M1)の始動中に第2〜4電動機(M
2)〜(M4)の起動指令が入力しても第2〜4始動用
接点(1b)〜(1d)および第2〜4定常運転用接点
(3b)〜(3d)が閉じないようなインターロックも
設けられている。[0019] From the manual start switch to the first motor (M1)
When the start command is input, the first start contact (1a
) is closed, and the first electric motor (M
1) Start. When the starting of the first electric motor (M1) is completed after a predetermined period of time has elapsed, the first starting contact (1a
) and connect the first motor (M1) to the inverter (10).
After about 3 seconds have elapsed to prevent the influence of residual voltage, the first steady operation contact (3a) is closed, and the first motor (M1) is connected to the commercial power line (14). Switch to steady operation. Note that an interlock is provided so that the first starting contact (1a) and the first steady operation contact (3a) do not close at the same time at this time. Also, while the first electric motor (M1) is starting, the second to fourth electric motors (M
2) An interface in which the 2nd to 4th starting contacts (1b) to (1d) and the 2nd to 4th steady operation contacts (3b) to (3d) do not close even if the starting commands from to (M4) are input. A lock is also provided.
【0020】第2〜4電動機(M2)〜(M4)の起動
も同様に行なわれる。また、自動起動スイッチからの自
動起動指令により、4つの電動機(M1)〜(M4)が
所定の順序で上記のようにして起動される。The second to fourth electric motors (M2) to (M4) are started in the same manner. In addition, the four electric motors (M1) to (M4) are started in a predetermined order as described above by an automatic start command from an automatic start switch.
【0021】なお、上記実施例における各部の構成およ
び数値などは単に1例を示しただけのものであり、この
発明はこれらに限定されるものではない。It should be noted that the configurations and numerical values of each part in the above embodiments are merely examples, and the present invention is not limited thereto.
【0022】[0022]
【発明の効果】この発明の始動装置によれば、上述のよ
うに、慣性モーメントが大きい容量の異なる複数の電動
機を1つのインバータで始動することができ、したがっ
て、電動機の容量および電源容量を小さくすることがで
き、始動時に大電流が流れることがない。そして、始動
時に大電流が流れないので、始動による騒音が大幅に低
減され、始動、停止を繰返し行なっても電動機の寿命が
短くなることがない。このため、必要に応じて電動機の
始動、停止を行なうことができ、ランニングコストを低
減することができる。According to the starting device of the present invention, as described above, a plurality of electric motors with large moments of inertia and different capacities can be started with one inverter, and therefore the capacity of the electric motors and the power supply capacity can be reduced. This prevents large current from flowing during startup. Since no large current flows during starting, the noise caused by starting is significantly reduced, and the life of the motor will not be shortened even if starting and stopping are repeated. Therefore, the electric motor can be started and stopped as necessary, and running costs can be reduced.
【図1】この発明の実施例を示す始動装置の全体概略ブ
ロック図である。FIG. 1 is an overall schematic block diagram of a starting device showing an embodiment of the present invention.
【図2】図1の主要部を示す回路図である。FIG. 2 is a circuit diagram showing main parts of FIG. 1;
(M1)(M2)(M3)(M4) 電
動機(10)
インバータ(11)
切換回路(12)
始動制御回路(始動制御手段)(M1) (M2) (M3) (M4) Electric motor (10)
Inverter (11)
Switching circuit (12)
Starting control circuit (starting control means)
Claims (1)
なる複数の電動機(M1)(M2)(M3)(M4)と
上記インバータ(10)および商用電源線(14)との
間に設けられた切換回路(11)、ならびに上記各電動
機(M1)(M2)(M3)(M4)を始動時には上記
インバータ(10)に接続し始動完了後に上記商用電源
線(14)に接続するように上記切換回路(11)を制
御する始動制御手段(12)を備えており、上記インバ
ータ(10)の容量が最も大きい電動機(M1)(M2
)(M3)(M4)の容量に基づいて定められ、上記イ
ンバータ(10)の始動特性が容量に対する負荷の慣性
モーメントの最も大きい電動機(M1)(M2)(M3
)(M4)の容量と負荷の関係に基づいて定められてい
る容量の異なる複数の電動機の始動装置。[Claim 1] One inverter (10), a plurality of electric motors (M1) (M2) (M3) (M4) having different capacities, provided between the inverter (10) and the commercial power line (14). The switching circuit (11) and the electric motors (M1, M2, M3, and M4) are connected to the inverter (10) at the time of starting, and connected to the commercial power line (14) after the starting is completed. The electric motor (M1) (M2) is equipped with a starting control means (12) for controlling the circuit (11), and the inverter (10) has the largest capacity.
) (M3) (M4), and the starting characteristics of the inverter (10) are the motors (M1) (M2) (M3) with the largest moment of inertia of the load relative to the capacity.
) (M4) A starting device for a plurality of electric motors with different capacities determined based on the relationship between capacity and load.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP915796A JPH04248382A (en) | 1991-01-22 | 1991-01-22 | Starter for a plurality of motors different in capacity |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP915796A JPH04248382A (en) | 1991-01-22 | 1991-01-22 | Starter for a plurality of motors different in capacity |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04248382A true JPH04248382A (en) | 1992-09-03 |
Family
ID=11621046
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP915796A Pending JPH04248382A (en) | 1991-01-22 | 1991-01-22 | Starter for a plurality of motors different in capacity |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04248382A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR19990046027A (en) * | 1999-03-12 | 1999-06-25 | 김삼원 | Multi-stage motor drive control method and its control apparatus of an inverter-converting type |
JPH11313494A (en) * | 1998-04-28 | 1999-11-09 | Ebara Shinwa:Kk | Control circuit for starting motor |
JP2011033337A (en) * | 2010-11-15 | 2011-02-17 | Daikin Industries Ltd | Fan driving device and air conditioner |
EP2096748A3 (en) * | 2008-02-29 | 2015-12-09 | Vacon Oyj | Connection of an electric motor to a supply network |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62140897U (en) * | 1986-02-27 | 1987-09-05 | ||
JPH01278281A (en) * | 1988-04-28 | 1989-11-08 | Toshiba Corp | Automatic controller for dust removing facility |
-
1991
- 1991-01-22 JP JP915796A patent/JPH04248382A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62140897U (en) * | 1986-02-27 | 1987-09-05 | ||
JPH01278281A (en) * | 1988-04-28 | 1989-11-08 | Toshiba Corp | Automatic controller for dust removing facility |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11313494A (en) * | 1998-04-28 | 1999-11-09 | Ebara Shinwa:Kk | Control circuit for starting motor |
KR19990046027A (en) * | 1999-03-12 | 1999-06-25 | 김삼원 | Multi-stage motor drive control method and its control apparatus of an inverter-converting type |
EP2096748A3 (en) * | 2008-02-29 | 2015-12-09 | Vacon Oyj | Connection of an electric motor to a supply network |
JP2011033337A (en) * | 2010-11-15 | 2011-02-17 | Daikin Industries Ltd | Fan driving device and air conditioner |
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