JPS6141831B2 - - Google Patents
Info
- Publication number
- JPS6141831B2 JPS6141831B2 JP53002131A JP213178A JPS6141831B2 JP S6141831 B2 JPS6141831 B2 JP S6141831B2 JP 53002131 A JP53002131 A JP 53002131A JP 213178 A JP213178 A JP 213178A JP S6141831 B2 JPS6141831 B2 JP S6141831B2
- Authority
- JP
- Japan
- Prior art keywords
- armature
- voltage
- car
- motor
- resistance
- 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.)
- Expired
Links
Landscapes
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Elevator Control (AREA)
- Protection Of Generators And Motors (AREA)
Description
【発明の詳細な説明】
この発明はエレベータ用電動機の過熱を保護す
る装置の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION This invention relates to an improvement in a device for protecting an elevator motor from overheating.
近来の経済情勢から、エレベータにおいても省
資源、低コスト、据付保守の簡易さが強く要求さ
れるようになり、特に電動機の小形軽量化の努力
が払われて来ている。 Due to recent economic conditions, there has been a strong demand for elevators to be resource-saving, low-cost, and easy to install and maintain, and efforts are being made to make electric motors more compact and lightweight.
ところで、自冷電動機においては、その時定数
が大きく、長時間過負荷で使用すると、電機子が
過熱する虞れがあり、電動機の寿命に影響を与
え、ときには焼損に至ることさえある。しかも、
電機子の温度は直接温度計で測ることは極めて困
難であり、サーミスタ等では保護できないという
欠点がある。 By the way, self-cooled motors have a large time constant, and if used under overload for a long period of time, there is a risk that the armature will overheat, which will affect the life of the motor and sometimes even lead to burnout. Moreover,
It is extremely difficult to directly measure the temperature of the armature with a thermometer, and it has the disadvantage that it cannot be protected with a thermistor or the like.
この発明は上記欠点を改良するもので、小形軽
量な電動機を苛酷な条件で使用しても過熱するこ
とのないようにしたエレベータ用電動機の保護装
置を提供することを目的とする。 The present invention aims to improve the above-mentioned drawbacks and provides a protection device for an elevator motor, which prevents the motor from overheating even when the motor is small and lightweight and is used under severe conditions.
以下、第１図及び第２図によりこの発明の一実
施例を説明する。 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
第１図中、１は誘導電動機（図示しない）によ
つて駆動される直流発電機の電機子、２は同じく
他励界磁、３はかご駆動用直流電動機の電機子、
４は同じく他励界磁、５は同じく補極、６は温度
上昇検出回路、６ａは電動機電機子電圧検出器、
６ｂは補極電圧検出器、６ｃは増幅器、Ｄはゼナ
ダイオード、R1〜R4は抵抗、７はかごの停止中
は閉成し走行中は開放する走行リレー接点、８は
付勢されると電機子３の運転を阻止する運転制御
リレーである。 In Fig. 1, 1 is the armature of a DC generator driven by an induction motor (not shown), 2 is also a separately excited field, 3 is the armature of a car drive DC motor,
4 is the same separately excited field, 5 is the same interpole, 6 is the temperature rise detection circuit, 6a is the motor armature voltage detector,
6b is a commutator voltage detector, 6c is an amplifier, D is a Zena diode, R 1 to R 4 are resistors, 7 is a traveling relay contact that is closed when the car is stopped and opened when the car is running, and 8 is energized. This is an operation control relay that prevents the armature 3 from operating.
まず、温度上昇検出回路６の動作について説明
する。 First, the operation of the temperature rise detection circuit 6 will be explained.
V1は補極５のように温度変化が少ない抵抗か
ら取り出した電圧であり、電機子３に流れる電流
Ｉ（後述）に比例する。また、V2は電機子３の
端子電圧である。そして、電機子３が停止してい
るときは次の関係が成り立つ。 V 1 is a voltage extracted from a resistor whose temperature changes little, such as the commutator 5, and is proportional to the current I (described later) flowing through the armature 3. Further, V 2 is the terminal voltage of the armature 3. When the armature 3 is stopped, the following relationship holds true.
V1＝ｒiＩ ……
V2＝ｒnＩ ……
ここに、ｒi：補極５の抵抗
ｒn：電機子３の抵抗
また、増幅器６ｃの出力電圧V0は次式で与え
られる。 V 1 = r i I ... V 2 = r n I ... Here, r i : Resistance of the commutating pole 5 r n : Resistance of the armature 3 In addition, the output voltage V 0 of the amplifier 6c is given by the following formula. .
V0＝−（V1Ｒ３／Ｒ１−V2Ｒ３／Ｒ２）……
〜式から
V0＝−Ｉ・Ｒ３ｒｉ／Ｒ２（Ｒ２／Ｒ１−ｒｎ／ｒｉ
）……
R1及びR2は電機子３が発熱していないとき、
ｒｎ／ｒｉ＝Ｒ２／Ｒ１になるように選ばれている。こ
のとき、
V0＝０となるので運転制御リレー８は付勢され
ない。次に、Ｉが電動機の定格電流で、かつｒn
が電機子３の絶縁限界温度付近の抵抗値に近づい
たときの電圧V0が、ゼナダイオードＤのゼナ電
圧になるように回路抵抗R1〜R3が選ばれている
ので、このときの電圧V0により運転制御リレー
８は付勢される。 V 0 =-(V 1 R 3 /R 1 -V 2 R 3 /R 2 )... From the formula, V 0 =-I・R 3 r i /R 2 (R 2 /R 1 -r n /r i
)... R 1 and R 2 are when armature 3 is not generating heat,
It is selected so that r n /r i =R 2 /R 1 . At this time, since V 0 =0, the operation control relay 8 is not energized. Next, I is the rated current of the motor, and r n
Since the circuit resistances R 1 to R 3 are selected so that the voltage V 0 when the voltage approaches the resistance value near the insulation limit temperature of the armature 3 becomes the Zena voltage of the Zena diode D, the voltage at this time The operation control relay 8 is energized by V 0 .
さて、エレベータでは、電機子３の起動時ブレ
ーキ（図示しない）を開放すると、かごとつり合
おもりの重量差（以下不平衡負荷という）によつ
てかごに衝撃を与えることがある。そこで、これ
を防止するため、かごの停止中上記不平衡負荷を
補償する電流をあらかじめ電機子３に流して、起
動トルクを立ち上がらせておくことが行われる。 Now, in an elevator, when a brake (not shown) is released at the time of starting the armature 3, a shock may be applied to the car due to the weight difference between the car and the counterweight (hereinafter referred to as unbalanced load). Therefore, in order to prevent this, while the car is stopped, a current that compensates for the unbalanced load is passed through the armature 3 in advance to build up the starting torque.
電機子３が発熱していないとき、その抵抗ｒn
は第２図の直線Ａの傾斜に相当する。このとき電
圧V0＝０であるので、運転制御リレー８は付勢
されない。エレベータが起動停止を繰り返えす
と、特に全負荷又は無負荷時の高頻度運転が続く
と、電機子３は発熱する。そして、電機子３の停
止中、上記不平衡負荷を補償する電流が流れてい
るときに電機子３が過熱状態にあり、絶縁限界付
近に達するとその抵抗ｒnは第２図の直線Ｂの傾
斜に相当する。このとき電機子３に定格電流が流
れていると、電圧V0によつて運転制御リレー８
は付勢され、電機子３は起動が阻止されるため、
焼損から免れる。 When armature 3 is not generating heat, its resistance r n
corresponds to the slope of straight line A in FIG. At this time, since the voltage V 0 =0, the operation control relay 8 is not energized. If the elevator repeatedly starts and stops, especially if it continues to operate frequently under full load or no load, the armature 3 generates heat. When the armature 3 is stopped and the current that compensates for the unbalanced load is flowing, the armature 3 is in an overheating state and reaches near the insulation limit, and its resistance r n is equal to the line B in Fig. 2. Corresponds to the slope. At this time, if the rated current is flowing through the armature 3, the operation control relay 8 is activated by the voltage V0.
is energized and armature 3 is prevented from starting, so
Avoid burnout.
なお、運転制御リレー８が付勢されたら、戸を
開いた後（かごが走行中なら階床に停止して戸を
開いた後）、かご内の戸閉ボタンを押しても戸を
閉じないようにするか、戸閉を開始させる時限リ
レー（図示しない）の時限を延ばしてから戸を閉
じるようにしてもよい。 When the operation control relay 8 is energized, the door will not close even if you press the door close button inside the car after opening the door (if the car is running, stop on the floor and open the door). Alternatively, the door may be closed after extending the time limit of a time relay (not shown) that starts closing the door.
また、かごが階床に着床した後、電機子３はブ
レーキによつて保持され、短時間経過すると電機
子３は発電機電機子１から切り放されるようにな
つている。この間、電機子３には上記不平衡負荷
を補償する電流が流されるが、このときの電機子
３の温度上昇も温度上昇検出回路６によつて検出
されることはもちろんである。 Further, after the car lands on the floor, the armature 3 is held by a brake, and the armature 3 is separated from the generator armature 1 after a short period of time. During this time, a current is passed through the armature 3 to compensate for the unbalanced load, and it goes without saying that the temperature rise in the armature 3 at this time is also detected by the temperature rise detection circuit 6.
なお、かごの走行中は、走行リレー接点７は開
放しているため、運転制御リレー８は動作しな
い。これは、かごの走行中は、式の電流Ｉが増
加するため、抵抗ｒnが低いにもかかわらず電圧
V0が大となり、運転制御リレー８が動作するの
を防止するためである。 Note that while the car is running, the running relay contact 7 is open, so the operation control relay 8 does not operate. This is because while the car is running, the current I in the equation increases, so even though the resistance r n is low, the voltage
This is to prevent the operation control relay 8 from operating due to V 0 becoming large.
第３図はこの発明の他の実施例を示す。 FIG. 3 shows another embodiment of the invention.
電機子３、補極５、抵抗R1及び抵抗R2によつ
てブリツジが構成され、電機子３が発熱していな
いときには下記条件が成立する。 A bridge is constituted by the armature 3, the commutating pole 5, the resistor R1 , and the resistor R2 , and when the armature 3 is not generating heat, the following conditions are satisfied.
ｒｎ／ｒｉ＝Ｒ２／Ｒ１ ……
したがつて、既述のように起動時又は着床時、
不平衡負荷を補償する電流が流れたとき、式の
条件が保たれていれば運転制御リレー８の両端電
圧は零である。しかし、電機子３が過熱状態にあ
れば、電機子抵抗ｒnは大となりブリツジの平衡
はくずれ、運転制御リレー８の両端に電機子抵抗
ｒnに対応する電圧が発生し、運転制御リレー８
は動作する。 r n /r i =R 2 /R 1 ... Therefore, as mentioned above, at the time of startup or implantation,
When the current that compensates for the unbalanced load flows, the voltage across the operation control relay 8 is zero if the conditions of the equation are maintained. However, if the armature 3 is in an overheated state, the armature resistance r n becomes large, the balance of the bridge is lost, a voltage corresponding to the armature resistance r n is generated across the operation control relay 8, and the operation control relay 8
works.
上記各実施例はワードレオナード方式について
説明したが、サイリスタを用いた静止レオナード
方式にも適用し得ることは明白である。 Although the above embodiments have been described in terms of the Ward Leonard system, it is obvious that the invention can also be applied to a stationary Leonard system using a thyristor.
以上説明したとおりこの発明では、かごの停止
中不平衡負荷を補償する電流を電動機の電機子に
流し、この電機子の抵抗値と補極の抵抗値の比が
所定値を越えたとき上記電機子の運転を制御する
ようにしたので、特別な装置を用いることなく電
動機電機子の温度上昇を的確に把握することがで
き、小形軽量な電動機を用いてもその過熱を保護
することができる。 As explained above, in this invention, when the car is stopped, a current to compensate for the unbalanced load is passed through the armature of the motor, and when the ratio of the resistance value of this armature to the resistance value of the commutating pole exceeds a predetermined value, the electric motor Since the operation of the motor armature is controlled, it is possible to accurately grasp the temperature rise of the motor armature without using any special equipment, and it is possible to protect the motor from overheating even if a small and lightweight motor is used.
第１図はこの発明によるエレベータ用電動機の
保護装置の一実施例を示す回路図、第２図は第１
図の電動機電機子の特性曲線図、第３図はこの発
明の他の実施例を示す回路図である。
１……直流発電機の電機子、３……直流電動機
の電機子、５……同左補極、６……温度上昇検出
回路、６ａ……電動機電機子電圧検出器、６ｂ…
…補極電圧検出器、６ｃ……増幅器、Ｄ……ゼナ
ダイオード、R1〜R4……抵抗、７……走行リレ
ー接点、８……運転制御リレー。なお、図中同一
部分は同一符号により示す。
FIG. 1 is a circuit diagram showing an embodiment of an elevator motor protection device according to the present invention, and FIG.
FIG. 3 is a characteristic curve diagram of the motor armature shown in the figure, and FIG. 3 is a circuit diagram showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Armature of a DC generator, 3... Armature of a DC motor, 5... Same left complementary pole, 6... Temperature rise detection circuit, 6a... Motor armature voltage detector, 6b...
...Commuting electrode voltage detector, 6c...Amplifier, D...Zena diode, R1 to R4 ...Resistance, 7...Travel relay contact, 8...Driving control relay. Note that the same parts in the figures are indicated by the same reference numerals.
Claims (1)
接続され上記電機子によりかごとつり合おもりが
駆動され、上記電機子の停止時上記かごとつり合
おもりの重量差を補償する電流を上記電機子に流
すようにしたものにおいて、上記補償電流通電時
の上記電機子の電圧と上記補極の電圧を検出して
上記電機子の抵抗値と上記補極の抵抗値の比を演
算し、その値が所定値を越えると動作する温度上
昇検出回路、及び上記電機子の停止中上記温度上
昇検出回路が動作すれば上記電機子の運転を阻止
する運転制御リレーを備えたことを特徴とするエ
レベータ用電動機の保護装置。1 The commutating poles of the armature are connected in series and connected to a DC power source, the car and the counterweight are driven by the armature, and when the armature is stopped, a current is generated to compensate for the difference in weight between the car and the counterweight. In the case where the compensation current is applied to the armature, the voltage of the armature and the voltage of the commutating pole are detected and the ratio of the resistance value of the armature and the resistance of the commutating pole is calculated. , comprising a temperature rise detection circuit that operates when the value exceeds a predetermined value, and an operation control relay that prevents operation of the armature if the temperature rise detection circuit operates while the armature is stopped. Protective device for elevator motors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP213178A JPS5495440A (en) | 1978-01-12 | 1978-01-12 | Protector for motor of elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP213178A JPS5495440A (en) | 1978-01-12 | 1978-01-12 | Protector for motor of elevator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5495440A JPS5495440A (en) | 1979-07-27 |
| JPS6141831B2 true JPS6141831B2 (en) | 1986-09-17 |
Family
ID=11520777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP213178A Granted JPS5495440A (en) | 1978-01-12 | 1978-01-12 | Protector for motor of elevator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5495440A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2005092769A1 (en) * | 2004-03-26 | 2008-02-14 | 三菱電機株式会社 | Elevator control device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3632671A1 (en) * | 1985-11-13 | 1987-05-21 | Heidelberger Druckmasch Ag | DEVICE FOR TEMPERATURE MONITORING OF A DC CURRENT SHUTTER MOTOR FOR DRIVING ROTARY PRINTING MACHINES |
| JP5055772B2 (en) * | 2006-01-26 | 2012-10-24 | 三菱電機株式会社 | Elevator diagnostic operation device |
-
1978
- 1978-01-12 JP JP213178A patent/JPS5495440A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2005092769A1 (en) * | 2004-03-26 | 2008-02-14 | 三菱電機株式会社 | Elevator control device |
| JP4896711B2 (en) * | 2004-03-26 | 2012-03-14 | 三菱電機株式会社 | Elevator control device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5495440A (en) | 1979-07-27 |
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