JPH0127434Y2 - - Google Patents
Info
- Publication number
- JPH0127434Y2 JPH0127434Y2 JP1981064285U JP6428581U JPH0127434Y2 JP H0127434 Y2 JPH0127434 Y2 JP H0127434Y2 JP 1981064285 U JP1981064285 U JP 1981064285U JP 6428581 U JP6428581 U JP 6428581U JP H0127434 Y2 JPH0127434 Y2 JP H0127434Y2
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- starting
- coil
- automatic reset
- protection device
- 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
- 239000003990 capacitor Substances 0.000 claims description 17
- 230000006698 induction Effects 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 1
Landscapes
- Motor And Converter Starters (AREA)
Description
【考案の詳細な説明】
本考案はコンデンサ起動単相誘導電動機の改良
に関するものである。[Detailed Description of the Invention] The present invention relates to an improvement of a capacitor-starting single-phase induction motor.
従来、コンデンサ起動単相誘導電動機として
は、主コイルに並列して起動コイルとコンデンサ
および遠心力スイツチを配置し、主コイル側には
熱動形の保護装置を設けたものが一般的であつ
た。 Conventionally, capacitor-started single-phase induction motors generally had a starting coil, a capacitor, and a centrifugal force switch placed in parallel with the main coil, and a thermal protection device on the main coil side. .
しかし乍ら、前述主コイル側の保護装置は運転
中における過負荷や拘束時において主コイルの回
路に流れる電流値の増大による発熱をもつて作動
して、電動機の運転を停止するものである。した
がつて、機器使用現場が電源より遠隔位置にある
ときのごとき長尺の電線の使用や、多数の機器を
同時併用したとき等に発生する極端な低電圧（50
〜70V）状態、および発電機側の不具合等によつ
て生ずる低周波数（45Hz以下）状態等の場合で
は、電動機の回転が所定回転数まで上昇しないた
め起動回路の遠心力スイツチが作動せず、起動コ
イル側にもいつまでも電流が流れ続けることとな
る。 However, the protection device on the main coil side is activated by heat generation due to an increase in the value of current flowing through the circuit of the main coil during overload or restraint during operation, and stops the operation of the motor. Therefore, extremely low voltage (50%
~70V) or low frequency (45Hz or less) caused by a malfunction on the generator side, etc., the rotation of the motor does not rise to the specified rotation speed, so the centrifugal force switch in the starting circuit does not operate. Current continues to flow to the starting coil side forever.
しかも、この場合の主回路に流れる電流値は過
負荷時や拘束時に比し極めて低いため、前述主コ
イル側の保護装置は作動しない。 Moreover, since the current value flowing through the main circuit in this case is extremely low compared to when the vehicle is overloaded or locked, the protection device on the main coil side does not operate.
したがつて、前述低電圧、低周波数の状態では
短時間でコンデンサのパンクや、起動コイルの焼
損事故に至ることとなる。 Therefore, under the aforementioned low voltage and low frequency conditions, the capacitor may be punctured or the starting coil may burn out in a short period of time.
本考案は前述現状に鑑み、コンデンサに連続的
に電流が流れた際に内部発熱によつて表面温度が
90〜100℃にもなる点に着目し、起動コイルと直
列に挿入した熱動形自動復帰式保護装置をコンデ
ンサに近接配置して、低電圧・低周波数状態等に
おける起動回路を遮断せしめることにより、コン
デンサおよび起動コイルの保護を図り得るごとく
したことを特長とするコンデンサ起動単相誘導電
動機に関するものである。 This invention was developed in consideration of the current situation mentioned above, and when current flows continuously through a capacitor, the surface temperature increases due to internal heat generation.
Focusing on the fact that temperatures can reach 90 to 100 degrees Celsius, a thermal automatic reset protection device inserted in series with the starting coil is placed close to the capacitor to shut off the starting circuit in low voltage and low frequency conditions. This invention relates to a capacitor-starting single-phase induction motor, which is characterized in that the capacitor and starting coil can be protected.
図の実施例回路図に基き詳述すれば、１は電源
接続部、２は主コイル、３は主コイル側に設けた
熱動形自動復帰式保護装置、４〜７は前記主コイ
ル２と並列に設けた起動回路Ｓ中に順次配置せる
遠心力スイツチ・起動コイル・熱動形自動復帰式
保護装置・およびコンデンサで、保護装置６はコ
ンデンサ７の所定値以上の温度上昇を感知して作
動し得るごとく、該コンデンサに近接させてあ
る。 To explain in detail based on the embodiment circuit diagram shown in the figure, 1 is a power supply connection part, 2 is a main coil, 3 is a thermal automatic reset type protection device provided on the main coil side, and 4 to 7 are the main coil 2 and the main coil 2. A centrifugal force switch, a starting coil, a thermal automatic reset type protection device, and a capacitor are arranged sequentially in a starting circuit S arranged in parallel.The protection device 6 is activated by sensing a temperature rise of the capacitor 7 exceeding a predetermined value. It is placed as close as possible to the capacitor.
しかして、正常な状態での起動時は所定回転数
に至つて遠心力スイツチ４の作動により起動回路
Ｓが遮断され、運転中に生じた過負荷や拘束時は
保護装置３の作動により運転が停止される。ま
た、低電圧または低周波数の状態での起動時は、
保護装置６がコンデンサ７の温度上昇により作動
して起動回路Ｓを遮断するため、起動コイル５お
よびコンデンサ７の保護を図り得るものである。 Therefore, when starting under normal conditions, the starting circuit S is cut off by the operation of the centrifugal force switch 4 when the rotation speed reaches a predetermined number, and when an overload or restraint occurs during operation, the operation is stopped by the operation of the protection device 3. will be stopped. Also, when starting under low voltage or low frequency conditions,
Since the protection device 6 is activated by the rise in temperature of the capacitor 7 and interrupts the starting circuit S, the starting coil 5 and the capacitor 7 can be protected.
以上詳述せるごとく本考案電動機においては、
起動コイルに直列に挿入した熱動形自動復帰式保
護装置をコンデンサに近接配置せしめるのみの簡
単な構成の追加により、低電圧・低周波数の状態
においても起動コイルおよびコンデンサを保護し
得るものである。 As detailed above, in the electric motor of the present invention,
The starting coil and capacitor can be protected even under low voltage and low frequency conditions by simply adding a thermal automatic reset protection device inserted in series with the starting coil and placing it close to the capacitor. .
図面は本考案の１実施例を示す回路図である。
図中、２は主コイル、５は起動コイル、６は熱
動形自動復帰式保護装置、７はコンデンサを示
す。
The drawing is a circuit diagram showing one embodiment of the present invention. In the figure, 2 is a main coil, 5 is a starting coil, 6 is a thermal automatic reset type protective device, and 7 is a capacitor.
Claims (1)
サを配置した回路より成るものにおいて、前記起
動コイルと直列に遠心力スイツチと熱動形自動復
帰式保護装置を挿入し、該熱動形自動復帰式保護
装置をコンデンサに近接配置してコンデンサの温
度上昇によつて熱動形自動復帰式保護装置が作動
するごとくしたことを特徴とするコンデンサ起動
単相誘導電動機。 In a circuit consisting of a starting coil and a capacitor placed in parallel with the main coil, a centrifugal force switch and a thermal automatic reset protective device are inserted in series with the starting coil, and the thermal automatic reset protective device is A capacitor-started single-phase induction motor characterized in that the capacitor is placed close to the capacitor so that a thermal automatic reset type protection device is activated by a rise in temperature of the capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981064285U JPH0127434Y2 (en) | 1981-04-30 | 1981-04-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981064285U JPH0127434Y2 (en) | 1981-04-30 | 1981-04-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57177391U JPS57177391U (en) | 1982-11-10 |
| JPH0127434Y2 true JPH0127434Y2 (en) | 1989-08-16 |
Family
ID=29860366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981064285U Expired JPH0127434Y2 (en) | 1981-04-30 | 1981-04-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0127434Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS42403Y1 (en) * | 1964-10-30 | 1967-01-12 |
-
1981
- 1981-04-30 JP JP1981064285U patent/JPH0127434Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS42403Y1 (en) * | 1964-10-30 | 1967-01-12 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57177391U (en) | 1982-11-10 |
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