JP2597036Y2 - Composite resistor - Google Patents
Composite resistorInfo
- Publication number
- JP2597036Y2 JP2597036Y2 JP1993035930U JP3593093U JP2597036Y2 JP 2597036 Y2 JP2597036 Y2 JP 2597036Y2 JP 1993035930 U JP1993035930 U JP 1993035930U JP 3593093 U JP3593093 U JP 3593093U JP 2597036 Y2 JP2597036 Y2 JP 2597036Y2
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- regenerative
- resistors
- overcurrent detection
- rush
- 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 - Lifetime
Links
Landscapes
- Control Of Ac Motors In General (AREA)
- Power Conversion In General (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、モータ制御用インバー
タ回路（以下インバータ回路と略す）で用いられる突入
抑制用抵抗、過電流検出用抵抗および回生用抵抗に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inrush suppression resistor, an overcurrent detection resistor, and a regenerative resistor used in a motor control inverter circuit (hereinafter referred to as an inverter circuit).
【０００２】[0002]
【従来の技術】インバータ回路で用いられる突入抑制用
抵抗、過電流検出用抵抗および回生用抵抗は、それぞれ
個別の抵抗器が用いられていた。2. Description of the Related Art Separate resistors have been used for a rush suppression resistor, an overcurrent detection resistor and a regenerative resistor used in an inverter circuit.
【０００３】図３に従来の回路を示す。２はＡＣ電源で
あり、３は整流回路、４は突入抑制用リレー、５は平滑
コンデンサ、６は過電流検出回路、７は回生処理用トラ
ンジスタ、８はトランジスタモジュール、９はモータ、
１１は突入抑制用抵抗、１２は過電流検出用抵抗、１３
は回生用抵抗である。FIG. 3 shows a conventional circuit. 2 is an AC power supply, 3 is a rectifier circuit, 4 is an inrush suppression relay, 5 is a smoothing capacitor, 6 is an overcurrent detection circuit, 7 is a regeneration processing transistor, 8 is a transistor module, 9 is a motor,
11 is a rush suppression resistor, 12 is an overcurrent detection resistor, 13
Is a regenerative resistor.
【０００４】突入抑制用抵抗１１はＡＣ電源２を整流し
て作り出したＤＣ電源を利用する機器の、ＡＣ電源入力
側もしくは整流回路３から平滑コンデンサ５間のいずれ
かに直列に挿入される。なおこの抵抗は定常時の抵抗損
失が発生するため、この突入抑制用抵抗をバイパスする
目的でリレー等のスイッチを抵抗と並列に接続すること
もある。[0004] An inrush suppression resistor 11 is inserted in series between the AC power supply input side or between the rectifier circuit 3 and the smoothing capacitor 5 of a device using a DC power supply produced by rectifying the AC power supply 2. Note that since this resistor causes a resistance loss in a steady state, a switch such as a relay may be connected in parallel with the resistor for the purpose of bypassing the inrush suppression resistor.
【０００５】突入抑制用抵抗１１は機器の電源投入時に
平滑コンデンサ５を瞬時に充電するラッシュ電流を低減
し、ラッシュ電流による平滑コンデンサ５の寿命低下や
電源開閉用のマグネットコンダクタなどの接点溶着、お
よび同電力系統の他の機器のフリッカを防止するために
使用される。そのため突入抑制用抵抗１１は耐ラッシュ
特性が重要で、瞬間には抵抗の定格電力の数百倍の電力
を消費できるようなセメント充填型巻線抵抗器等が使用
されていた。The rush suppression resistor 11 reduces a rush current that instantaneously charges the smoothing capacitor 5 when the power of the device is turned on, shortens the life of the smoothing capacitor 5 due to the rush current, welds a contact such as a magnet conductor for opening and closing the power supply, and It is used to prevent flicker of other devices in the power system. For this reason, the rush resistance of the rush suppression resistor 11 is important, and a cement-filled wire-wound resistor capable of consuming several hundred times the rated power of the resistor at the moment has been used.
【０００６】過電流検出用抵抗１２は平滑コンデンサ５
とトランジスタモジュール８との間に直列に挿入され、
トランジスタモジュール８に流れる電流が過電流検出用
抵抗１２の両端電圧に比例することを利用して、抵抗の
両端電圧に監視することにより、異常時の過大な電流を
検出して機器の保護を行う目的で使用されている。The overcurrent detecting resistor 12 is a smoothing capacitor 5
And a transistor module 8 in series,
By using the fact that the current flowing through the transistor module 8 is proportional to the voltage across the overcurrent detection resistor 12 and monitoring the voltage across the resistor, an excessive current at the time of abnormality is detected to protect the device. Used for purposes.
【０００７】この過電流検出用抵抗１２に要求される特
性としては抵抗に流れる電流と抵抗の電圧降下の直線性
であり、具体的には自己インダクタンスが小さく、抵抗
値の温度変化の少ない、高精度な抵抗値許容差を持つ無
誘導型の平型抵抗をセメントで封止した抵抗器などが多
く使用される。The characteristics required of the overcurrent detecting resistor 12 are the linearity of the current flowing through the resistor and the voltage drop of the resistor. More specifically, the self-inductance is small, the resistance value does not change much with temperature, and the high value. A resistor in which a non-inductive type flat resistor having an accurate resistance value tolerance is sealed with cement is often used.
【０００８】回生用抵抗１３はトランジスタなどのスイ
ッチを直列に挿入した形で、平滑コンデンサ５に並列に
接続させる。インバータの負荷がモータ９である場合、
モータ９を制動させる制御を行うとモータ９が発電機と
して機能し、モータ９と負荷の慣性モーメントによる回
転エネルギーが電気エネルギーに変換されて平滑コンデ
ンサ５に充電エネルギーとして蓄えられるので、平滑コ
ンデンサ５およびトランジスタモジュール８の許容電圧
を越える恐れがある。このままではモータ９を制動させ
る回生動作は行えないため、平滑コンデンサ５の電圧を
監視し、あるしきい値を越えると回生用抵抗１３に直列
に接続したトランジスタ７などのスイッチング素子を動
作させて平滑コンデンサ５に充電されたモータの回生エ
ネルギーを熱消費させるものである。通常インバータの
最大出力を消費できる抵抗値の数十Ｗ〜数百Ｗの電力型
巻線抵抗器が使用される。The regenerative resistor 13 is connected in parallel to the smoothing capacitor 5 with a switch such as a transistor inserted in series. When the load of the inverter is the motor 9,
When the control for braking the motor 9 is performed, the motor 9 functions as a generator, and the rotational energy due to the inertia moment of the motor 9 and the load is converted into electric energy and stored in the smoothing capacitor 5 as charging energy. The allowable voltage of the transistor module 8 may be exceeded. Since the regenerative operation for braking the motor 9 cannot be performed in this state, the voltage of the smoothing capacitor 5 is monitored, and when a certain threshold value is exceeded, the switching element such as the transistor 7 connected in series to the regenerative resistor 13 is operated to smooth the voltage. The regenerative energy of the motor charged in the capacitor 5 is consumed by heat. Usually, a power type winding resistor having a resistance value of several tens W to several hundreds W capable of consuming the maximum output of the inverter is used.
【０００９】[0009]
【考案が解決しようとする課題】ところが、近年の機器
の小型化要求の高まりにつれこれらの抵抗器の小型化、
省スペース化が問題となっていた。従来の抵抗器では基
板の高密度実装についてはあまり考慮されておらず、各
抵抗器の基板実装および基板のパターン接続に大きなス
ペースを取られてしまっていた。[Problems to be Solved by the Invention] However, with the recent demand for miniaturization of equipment, miniaturization of these resistors,
Space saving was a problem. In conventional resistors, high-density mounting of substrates is not considered much, and a large space is required for mounting each resistor on the substrate and connecting the pattern of the substrate.
【００１０】本考案は上記従来の問題点に鑑み、基板の
高密度実装および各抵抗のパターンレス接続を可能とす
る複合抵抗器を提供することを目的とする。The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a composite resistor which enables high-density mounting of a substrate and patternless connection of each resistor.
【００１１】[0011]
【課題を解決するための手段】この目的を達成するため
に本考案の複合抵抗器は、各抵抗器の小型化には限度が
あることから、突入抑制用抵抗、過電流検出用抵抗およ
び回生用抵抗が回路上で互いに接続部を持つことに着目
すると同時に、各抵抗は同時に通電されないことを利用
して、これらの抵抗を同一箇体に納め複合化した構成を
有するものである。In order to achieve this object, the composite resistor according to the present invention has a limitation in miniaturization of each resistor. Therefore, a rush suppression resistor, an overcurrent detection resistor and a regenerative resistor are provided. Attention is paid not only to the fact that the resistors have connections with each other on the circuit, but also to the fact that these resistors are not energized at the same time, making use of the fact that these resistors are housed in the same body and combined.
【００１２】[0012]
【作用】突入抑制用抵抗は電源投入時のみ電力を消費
し、その後は全く電力を消費しないため、そして過電流
検出用抵抗はインバータに電力を供給するときのみ、回
生用抵抗はインバータの回生動作時のみそれぞれ通電さ
れ、同時には電力を消費しないため、互いの抵抗体の発
熱による相互干渉を考慮することなく複合化が可能とな
り抵抗器の小型、省スペース、基板の高密度実装が実現
できる。[Action] Since the inrush suppression resistor consumes power only when the power is turned on and does not consume any power thereafter, the overcurrent detection resistor is used only when power is supplied to the inverter, and the regenerative resistor is used for the regenerative operation of the inverter. Only when the power is supplied, the power is not consumed at the same time, so that it is possible to combine the components without considering mutual interference due to the heat generated by the resistors, thereby realizing the miniaturization of the resistors, the space saving, and the high-density mounting of the substrate.
【００１３】[0013]
【実施例】以下本考案の一実施例について、図面を参照
しながら説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.
【００１４】（実施例１） 図１に本考案の第１の実施例を示す。図１において、１
は複合抵抗器であり、従来と同じ部品は説明を略す。本
実施例では突入抑制用抵抗１１と過電流検出用抵抗１２
と回生用抵抗１３とを直列接続して同一箇体とし、各抵
抗の接続点から接続端子を引き出した構成としている。
このように各抵抗を接続すると、１３の回生用抵抗が短
絡故障を起こしたとき１２の過電流検出用抵抗を通じて
短絡電流が流れるため１３の回生用抵抗の短絡故障が検
出できる。(First Embodiment) FIG. 1 shows a first embodiment of the present invention. In FIG. 1, 1
Denotes a composite resistor, and the description of the same components as those in the related art is omitted. In this embodiment, the rush suppression resistor 11 and the overcurrent detection resistor 12
And the regenerative resistor 13 are connected in series to form the same body, and a connection terminal is drawn out from a connection point of each resistor.
When these resistors are connected in this manner, when a short circuit fault occurs in the 13 regenerative resistors, a short circuit current flows through the 12 overcurrent detection resistors, so that a short circuit fault in the 13 regenerative resistors can be detected.
【００１５】（実施例２） 図２に回生抵抗の接続を変化させた本考案の第２の実施
例を示す。この実施例では、突入抑制用抵抗１１と過電
流検出用抵抗１２を直列接続し、この接続点に回生用抵
抗１３の一方の端子を接続し、他方の端子を回生処理用
トランジスタ７のコレクタに接続している。このように
各抵抗を接続すると、インバータ回生動作時には回生用
抵抗１３と過電流検出用抵抗１２が同時に通電されるこ
とになるが、通常過電流検出用抵抗１２の損失は回生用
抵抗１３に比べて小さいためあまり問題はない。特長と
しては実施例１のようにモータからの回生電流が回生用
抵抗１３に流れ込むことなく、全て過電流検出用抵抗１
２を流れるため、回生動作時の過電流保護が精度良く行
える。Embodiment 2 FIG. 2 shows a second embodiment of the present invention in which the connection of the regenerative resistor is changed. In this embodiment, the rush suppression resistor 11 and the overcurrent detection resistor 12 are connected in series, one terminal of the regenerative resistor 13 is connected to this connection point, and the other terminal is connected to the collector of the regenerating transistor 7. Connected. When these resistors are connected in this manner, the regenerative resistor 13 and the overcurrent detecting resistor 12 are simultaneously energized during the inverter regenerative operation. However, the loss of the overcurrent detecting resistor 12 is usually smaller than that of the regenerative resistor 13. There is no problem because it is small. As a feature, the regenerative current from the motor does not flow into the regenerative resistor 13 as in the first embodiment.
2, the overcurrent protection during the regenerative operation can be accurately performed.
【００１６】[0016]
【考案の効果】以上のように本考案はインバータ回路で
用いられる突入抑制用抵抗、過電流検出用抵抗および回
生用抵抗を互いの発熱をあまり考慮することなく複合小
型化でき、かつ複合化により基板の高密度実装および各
抵抗の基板のパターンレス接続を可能にし、機器の小型
化に大きく寄与するものである。As described above, according to the present invention, the rush suppression resistor, the overcurrent detection resistor, and the regenerative resistor used in the inverter circuit can be miniaturized without considering the heat generation of each other. This enables high-density mounting of substrates and patternless connection of each resistance substrate, greatly contributing to miniaturization of equipment.
【図１】本考案の第１の実施例におけるモータ制御用イ
ンバータ回路の複合抵抗器の接続構成図FIG. 1 is a connection configuration diagram of a compound resistor of a motor control inverter circuit according to a first embodiment of the present invention.
【図２】本考案の第２の実施例におけるモータ制御用イ
ンバータ回路の複合抵抗器の接続構成図FIG. 2 is a connection configuration diagram of a compound resistor of a motor control inverter circuit according to a second embodiment of the present invention;
【図３】従来のモータ制御用インバータ回路図FIG. 3 is a conventional inverter circuit diagram for motor control.
１ 複合抵抗器 ２ ＡＣ電源 ３ 整流回路 ４ 突入抑制用リレー ５ 平滑コンデンサ ６ 過電流検出回路 ７ 回生処理用トランジスタ ８ トランジスタモジュール ９ モータ １１ 突入抑制用抵抗 １２ 過電流検出用抵抗 １３ 回生用抵抗 REFERENCE SIGNS LIST 1 composite resistor 2 AC power supply 3 rectifier circuit 4 inrush suppression relay 5 smoothing capacitor 6 overcurrent detection circuit 7 regeneration transistor 8 transistor module 9 motor 11 inrush suppression resistor 12 overcurrent detection resistor 13 regenerative resistor
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) H02M 1/00 H02M 1/16 H02M 7/48 H02P 7/63 302 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) H02M 1/00 H02M 1/16 H02M 7/48 H02P 7/63 302
Claims (1)
用抵抗と過電流検出用抵抗と回生用抵抗を同一箇体に納
めた複合抵抗器。A composite resistor in which a rush suppression resistor, an overcurrent detection resistor, and a regenerative resistor of a motor control inverter circuit are contained in the same body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993035930U JP2597036Y2 (en) | 1993-06-30 | 1993-06-30 | Composite resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993035930U JP2597036Y2 (en) | 1993-06-30 | 1993-06-30 | Composite resistor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH079088U JPH079088U (en) | 1995-02-07 |
| JP2597036Y2 true JP2597036Y2 (en) | 1999-06-28 |
Family
ID=12455756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1993035930U Expired - Lifetime JP2597036Y2 (en) | 1993-06-30 | 1993-06-30 | Composite resistor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2597036Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4556918B2 (en) * | 2006-06-23 | 2010-10-06 | 株式会社豊田自動織機 | Power supply device with regenerative energy consumption circuit |
| JP6149592B2 (en) * | 2013-08-08 | 2017-06-21 | オムロン株式会社 | Power supply |
| KR101611010B1 (en) * | 2013-11-19 | 2016-04-08 | 엘에스산전 주식회사 | Pre-charging circuit of inverter |
-
1993
- 1993-06-30 JP JP1993035930U patent/JP2597036Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH079088U (en) | 1995-02-07 |
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