JPS5843190A - Starter for squirrel cage induction motor - Google Patents
Starter for squirrel cage induction motorInfo
- Publication number
- JPS5843190A JPS5843190A JP13989781A JP13989781A JPS5843190A JP S5843190 A JPS5843190 A JP S5843190A JP 13989781 A JP13989781 A JP 13989781A JP 13989781 A JP13989781 A JP 13989781A JP S5843190 A JPS5843190 A JP S5843190A
- Authority
- JP
- Japan
- Prior art keywords
- thyristor
- starting
- induction motor
- cage induction
- squirrel
- 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
- 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
- H02P1/26—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor
- H02P1/28—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor by progressive increase of voltage applied to primary circuit of motor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor And Converter Starters (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、始動用サイリスタの定格電流値をかご形霞導
電動機の定格電流値と略等しく選定することができるよ
うにしたかど形誘導電動機の始動装置に関するもので−
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a starting device for a corner type induction motor in which the rated current value of a starting thyristor can be selected to be approximately equal to the rated current value of a squirrel cage type haze conduction motor.
be.
すなわち、本発明は、かご形誘導電動機を始動する際、
その始動電流値をかご形誘導電動機の定格電流値と略等
しい値にすることによって、始動用サイリスタの容量を
かご形誘導電動機の定格電流値と略等しく選定できる始
動装着を提供するもので、始動用サイリスタの容量選定
に対しサイリスタの容量限度まで有効に選定できるよう
にする 。That is, in the present invention, when starting a squirrel cage induction motor,
By setting the starting current value to a value approximately equal to the rated current value of the squirrel cage induction motor, a starting installation is provided in which the capacity of the starting thyristor can be selected to be approximately equal to the rated current value of the squirrel cage induction motor. To enable effective selection of thyristor capacity up to its capacity limit.
ことを目的としてりる・ 以下、本発明の一実施例を図に“つぃて説明す、る。The purpose is to Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
第１図において、（１）は電源母線叫に接続された保麹
用し゛や断器で、こめしゃ断器（、ｌ）を介して始動用
サイリスタ装置（６）が接続されておシ、この始動サイ
リスタ装置（６）Ｋ保護用熱動継電器（２）を介してか
ご形誘導電動Ｉ！ （３）が接続されている。また、（
４）線回転検出発電機、（５）は負荷となる機器で１発
電機（４）及び負荷（５）はかご形誘導電動ａｍ（３）
に機械的に接続されて、電動機（３）の駆動力によって
負荷（５）は駆動され、発電機（４）は電動機（３）の
回転数に応じた電圧を検出するようＫなっている。In Figure 1, (1) is a breaker or disconnector connected to the power supply bus line, and a starting thyristor device (6) is connected via the interrupter (l). Starting thyristor device (6) K The squirrel cage induction motor I! via the protective thermal relay (2)! (3) is connected. Also,(
4) Linear rotation detection generator, (5) is a load device, 1 generator (4) and load (5) are squirrel cage induction motor am (3)
The load (5) is driven by the driving force of the electric motor (3), and the generator (4) is configured to detect a voltage corresponding to the rotation speed of the electric motor (3).
しかして、（７）は、負荷（５）の負荷始動特性に見合
った電動機電流と回転数との設計対比値によって予め設
定されたラダー信号を発生するラダー信号発生器で、ラ
ダー信号は、選択器（９）によって数種類の負荷特性に
見合ったラダー信号形態の中から１種類のラダー信号形
態が選択され１回転検出発電礪（４）の検出電圧の追従
を確認した後回転数上昇指令のラダー信号を比較−（８
）−％出力讐るようになっておシ、また、−較器（８）
はラダー信号発生器（７）から出力されたラダー信号と
一転検出発電１１（４）から出力された回転検出電圧信
号を比較し、その差がある一定値以上となったとき、始
動サイリスタＶｔ［（６）のサイリスタへ点弧角制御の
信号を指令するようになっている。 １′１・・：、
・つまり、該選択器（９）、ラダー信号発生器（７）、
及び比較器（８）Ｋよる制御によって、かご形誘導電動
機（３）に印加される電圧値が制御されて回転トルクが
発生し負荷（５）を駆動するようＫなっている。すなわ
ち、ラダー信号発生器（７）は、第２図に示す回転検出
発電機（４）の検出電圧に追従するラダー信号発生器（
７）の信号特性に示されるように１回転検出発電１！１
ｌ（４）の速度−電圧特性に適応したラダー信号電圧を
発生するようになっている。したがって。Therefore, (7) is a ladder signal generator that generates a ladder signal that is preset by a design comparison value between motor current and rotation speed that matches the load starting characteristics of load (5). One type of ladder signal format is selected from among several types of ladder signal formats that match the load characteristics by the device (9), and after confirming that the detected voltage of the one-rotation detection generator (4) is being followed, the rudder signal for the rotation speed increase command is sent. Compare signals - (8
) - % output becomes different, and - comparator (8)
compares the rudder signal output from the rudder signal generator (7) and the rotation detection voltage signal output from the one-turn detection power generation unit 11 (4), and when the difference is greater than a certain value, the starting thyristor Vt[ A firing angle control signal is commanded to the thyristor (6). 1'1...:,
・That is, the selector (9), the ladder signal generator (7),
The voltage value applied to the squirrel cage induction motor (3) is controlled by the control by the comparator (8) K so that rotational torque is generated to drive the load (5). That is, the ladder signal generator (7) is a ladder signal generator (7) that follows the detected voltage of the rotation detection generator (4) shown in FIG.
7) As shown in the signal characteristics, one rotation detection power generation 1!1
A ladder signal voltage adapted to the speed-voltage characteristics of l(4) is generated. therefore.
かど形誘導電動機に印加される電圧を階段的に上昇させ
ることによって始動用サイリスタの定格電流値をかご形
誘動電動機の定格電流値と略等しく選定できるようにし
て、上記始動用サイリスタの定格電流値内でかご形誘導
電動機の始動を完了させることができる。By increasing the voltage applied to the squirrel-cage induction motor stepwise, the rated current value of the starting thyristor can be selected to be approximately equal to the rated current value of the squirrel-cage induction motor, thereby increasing the rated current of the starting thyristor. The starting of the squirrel cage induction motor can be completed within this value.
以上のように本発明によれば、始動用サイリスタの容量
限度をかご形誘導電動−の定格電流値と略等しい値に選
定でき始動用サイリスタを安価に設定することができる
という効果があるう：′１：As described above, according to the present invention, the capacity limit of the starting thyristor can be selected to be approximately equal to the rated current value of the squirrel cage induction motor, and the starting thyristor can be set at a low cost. '1:
第１図は本発明の一実施例によるかご形誘導電動機の一
始動装置を示す構成図、第２図はラダー信号発生器の指
令電圧特性を説明する特性図でちる。
【１）：保題用しゃ断器、（２）：保護用熱動継電器、
（３）：かご形誘導電動Ｉｌ！、（４）：回転検出発電
器、（５）：負荷・・ （６）：始動用サイー
リスタ装置（７）：ラダー信号発生器、 （８） ：比
較器。
ＱＱ：電源母線 （９）：選択器、代理人 葛
ｉ 信 −
第１１６１
０FIG. 1 is a configuration diagram showing a starting device for a squirrel cage induction motor according to an embodiment of the present invention, and FIG. 2 is a characteristic diagram illustrating command voltage characteristics of a ladder signal generator. [1): Protection circuit breaker, (2): Protection thermal relay,
(3): Squirrel cage induction electric motor! , (4): Rotation detection generator, (5): Load... (6): Starting thyristor device (7): Ladder signal generator, (8): Comparator. QQ: Power bus (9): Selector, agent Kuzu i Shin - No. 1161 0
Claims (1)
サイリスタを用い、骸サイリスタの点弧角を、負荷特性
に見合っ圧電動機電流値と回転数の設計対比値が予め設
定されているｉ選択器によって任意に選定されるラダー
信号発生器の信号値と、上記電−機に取付けた回転検出
発電機による検出回転数電圧とを比較してその比較差が
一定値輝上となった時に出力される比較器の出力にょっ
゛・て制御し、かど形誘導電動機に印加される電圧を階
段的に上共させるとと尋よって始動用サイリ゛血りの定
格電流値をかご形誘動電動機の定格電流値と略等しく選
定で着るようにして、上記始動用サイリスタの定格電流
値内でかご形誘導亀動機あ始動を完了させることを特徴
とするかご形誘導電動機の始動装置。When starting a squirrel-cage induction motor, a thyristor is used as a starting device, and the firing angle of the skeleton thyristor is determined by an i-selector in which design comparison values of the piezoelectric motor current value and rotation speed are set in advance according to the load characteristics. The signal value of the arbitrarily selected ladder signal generator is compared with the rotation speed voltage detected by the rotation detection generator attached to the above-mentioned electric machine, and it is output when the comparison difference exceeds a certain value. By controlling the output of the comparator and increasing the voltage applied to the squirrel-cage induction motor in a stepwise manner, the rated current value of the starting valve can be adjusted to the rated current of the squirrel-cage induction motor. A starting device for a squirrel-cage induction motor, characterized in that the squirrel-cage induction motor completes starting within the rated current value of the starting thyristor by setting the current value substantially equal to the current value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13989781A JPS5843190A (en) | 1981-09-03 | 1981-09-03 | Starter for squirrel cage induction motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13989781A JPS5843190A (en) | 1981-09-03 | 1981-09-03 | Starter for squirrel cage induction motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5843190A true JPS5843190A (en) | 1983-03-12 |
Family
ID=15256154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13989781A Pending JPS5843190A (en) | 1981-09-03 | 1981-09-03 | Starter for squirrel cage induction motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5843190A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5059715A (en) * | 1973-09-26 | 1975-05-23 |
-
1981
- 1981-09-03 JP JP13989781A patent/JPS5843190A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5059715A (en) * | 1973-09-26 | 1975-05-23 |
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