JPS62277081A - Inverter system - Google Patents
Inverter systemInfo
- Publication number
- JPS62277081A JPS62277081A JP11488586A JP11488586A JPS62277081A JP S62277081 A JPS62277081 A JP S62277081A JP 11488586 A JP11488586 A JP 11488586A JP 11488586 A JP11488586 A JP 11488586A JP S62277081 A JPS62277081 A JP S62277081A
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- transistor
- braking resistor
- braking
- voltage
- 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
- 238000009499 grossing Methods 0.000 abstract description 7
- 238000013021 overheating Methods 0.000 abstract description 3
- 230000001172 regenerating effect Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract 2
- 239000003990 capacitor Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000020169 heat generation Effects 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
Landscapes
- Stopping Of Electric Motors (AREA)
Abstract
Description
【発明の詳細な説明】
6、発明の詳細な説明
〔者業上の利用分野〕
この発明は、誘導電動機の付勢電力を供給するインバー
タ装置に関し、特に誘導電動機における回生電力の消費
回路を支良したインバータ、装置に関するものである。Detailed Description of the Invention 6. Detailed Description of the Invention [Field of Professional Application] This invention relates to an inverter device that supplies energizing power to an induction motor, and particularly to an inverter device that supports a regenerative power consumption circuit in an induction motor. This article relates to good inverters and devices.
第2図は従来装置を示す概略回路図である。図において
、Q(1は入力交流電源、α力はダイオード素子を含む
整流回路、(6)は平滑コンデンサ、αJはトランジス
タ素子を含むインバータ回路、α力は誘導電動機である
。α力は制動用抵抗器、α力は制動用抵抗器(至)に直
列接続された制動用トランジスタ素子、α力は平滑コン
デンサαaの両端電圧(”’o)またはその分電圧と基
準電線α榎のしきい値電圧(Vh )とを比較する比較
回路でちる。FIG. 2 is a schematic circuit diagram showing a conventional device. In the figure, Q (1 is the input AC power supply, α power is a rectifier circuit including diode elements, (6) is a smoothing capacitor, αJ is an inverter circuit including transistor elements, α power is an induction motor. α power is for braking. The resistor, α force is the braking transistor element connected in series with the braking resistor (to), and α force is the voltage across the smoothing capacitor αa ("'o) or its fraction voltage and the threshold value of the reference wire α Enoki. A comparison circuit is used to compare the voltage (Vh).
次に第6図(4)、 (B) 、 (C’lの波形図を
用いてその動作を説明する。まず、通常時においては、
入力交流電源(1(Jの信号が整流回路αめと平滑コン
デンサαうにより直流箪圧(VO)に変換され(第3図
A参照)、次いでインバータ回路α1によシ、所定の周
波数をもった出力交流に逆変換されて電動機Cl41に
電力が供給される。一方、第6図(C)に示すように(
その縦軸は電動機の回転数Nを示す)、電動機(1→が
時刻(1,)で減速する場合、電動機(14からの回生
電力はインバータ回路(6)を介して平滑コンデンサ(
2)に蓄えられ、その端子電圧(Vo)が上昇する。そ
してこの回生電力の電圧が時刻(1,)で基準電源(至
)のしきい値電圧(vh)を越えると、比較回路α乃の
出力でトランジスタ素子αQがオンとなる(第6図BB
照)。その結果、この回生電力は制動用抵抗器α→によ
り消費されてその電圧(VO)の上昇が抑えられる。電
圧(vo)が時刻(tl)でしきい値電圧(vh)以下
になると、トランジスタ素子αQがオフとなる。Next, the operation will be explained using the waveform diagrams of (4), (B) and (C'l) in FIG.
The signal of the input AC power supply (1 (J) is converted into a DC voltage (VO) by the rectifier circuit α and the smoothing capacitor α (see Figure 3A), and then passed through the inverter circuit α1 to generate a signal with a predetermined frequency. The output AC is inversely converted into AC output, and power is supplied to the electric motor Cl41.On the other hand, as shown in FIG. 6(C),
The vertical axis indicates the rotation speed N of the motor), and when the motor (1→ decelerates at time (1,), the regenerated power from the motor (14) is passed through the inverter circuit (6) to the smoothing capacitor (
2), and its terminal voltage (Vo) increases. When the voltage of this regenerated power exceeds the threshold voltage (vh) of the reference power supply (to) at time (1,), the output of the comparator circuit α turns on the transistor element αQ (Fig. 6BB
(see). As a result, this regenerated power is consumed by the braking resistor α→, and the rise in its voltage (VO) is suppressed. When the voltage (vo) becomes equal to or less than the threshold voltage (vh) at time (tl), the transistor element αQ is turned off.
このように制動用抵抗器@は電動機α→の制動時でしか
も回生電力の電圧がしきい値電圧より大きい場合に限っ
て直流母線(1) 、 (2)間に接続されるので、こ
の制動用抵抗器(至)の定格容量は電動機(14を含む
負荷の使用条件に合わせて選定されている。In this way, the braking resistor @ is connected between the DC buses (1) and (2) only when the motor α→ is braking and the voltage of the regenerated power is higher than the threshold voltage. The rated capacity of the resistor (14) is selected according to the usage conditions of the load including the motor (14).
具体的には、第6図(B)に示すよりなトランジスタ素
子clQのオン、オフ信号、すなわちパルス波信号のデ
ユーティ・レシオ(衝撃係数)によ)定まる平均電力に
よって、この制動用抵抗器(1υの定格容量値が選定さ
れる。Specifically, this braking resistor ( A rated capacity value of 1υ is selected.
上述のように従来装置の制動用抵抗器0υは、直流母線
(1) 、 (2)間にトランジスタ素子を介して直接
接続されているので、回生電力による制動用抵抗器(ト
)の異常過熱を避けるために大容量となっている。また
、制動用トランジスタ素子α→が故障等で短絡状態にな
ると、制動用抵抗器09は常時導通状態になり、そのた
め制動用抵抗器の発熱により火災が発生するという間頂
があった。As mentioned above, the braking resistor 0υ of the conventional device is directly connected between the DC buses (1) and (2) through a transistor element, so the braking resistor (g) is prevented from abnormally overheating due to regenerated power. It has a large capacity to avoid this. Further, when the braking transistor element α→ becomes short-circuited due to a failure or the like, the braking resistor 09 is always in a conductive state, and as a result, there is a possibility that a fire may occur due to the heat generated by the braking resistor.
この発明は上記のような問題点を解消するためになされ
たもので、制動用抵抗器とトランジスタ素子とに直列に
スイッチ素子を接続し、このスイッチ素子の開、閉動作
を制動用抵抗器に近接して設置した温度感応素子によっ
て行うもので、制動用抵抗器の異常発熱を感知して@記
の直列線路を遮断し、制動用抵抗器の異常発熱による火
災を防止することを目的とする。This invention was made to solve the above-mentioned problems. A switching element is connected in series with a braking resistor and a transistor element, and the opening and closing operations of this switching element are controlled by the braking resistor. This is done using a temperature sensitive element installed nearby, and the purpose is to detect abnormal heat generation in the braking resistor and interrupt the series line shown in @, thereby preventing fires due to abnormal heat generation in the braking resistor. .
この発明に係るインバータ装置は、直流母線に接続され
た制動用抵抗器に近接して温度感応素子を配置し、この
温度感応素子により制御されるスイッチを制動用抵抗器
とトランジスタ素子とに直列接続したものである。In the inverter device according to the present invention, a temperature sensitive element is arranged close to a braking resistor connected to a DC bus, and a switch controlled by the temperature sensitive element is connected in series with the braking resistor and a transistor element. This is what I did.
この発明における温度感応素子は、異常時にそのスイッ
チを解放して直流母線に接続された制動用抵抗器への線
路を遮断して異常発熱作用を防止する。The temperature sensitive element according to the present invention opens its switch in the event of an abnormality to cut off the line to the braking resistor connected to the DC bus, thereby preventing abnormal heat generation.
、〔発明の実施例〕
以下、この発明の一実施例による装置を第1図に示した
回路図によシ説明する。なお、第1区において、0)
、 (2)および0Q〜0→は第2図のそれと同じであ
る。田は制動用抵抗器r15に近接配置されたバイメタ
ルのような温度感応素子、Q■はこの温度感応素子(7
)によりその開、閉動作が制御されるスイッチ接点で、
このスイッチ接点Q1)は制動用抵抗器q9とトランジ
スタ素子(IQとに直列接続されている。, [Embodiment of the Invention] A device according to an embodiment of the invention will be explained below with reference to the circuit diagram shown in FIG. In addition, in the 1st ward, 0)
, (2) and 0Q~0→ are the same as those in FIG. 1 is a bimetal-like temperature sensitive element placed close to the braking resistor r15, and Q is this temperature sensitive element (7).
) is a switch contact whose opening and closing operations are controlled by
This switch contact Q1) is connected in series with a braking resistor q9 and a transistor element (IQ).
上記構成による装置の動作を次に説明する。まず、電動
機α→の通常時にはスイッチ素子な→が閉結して、制動
用抵抗器(19とトランジスタ素子00とが直列に接続
されており、このトランジスタ素子00は比較回路aカ
でオフになっている。このとき、時刻(1,)で電動機
Q4が減速され、回生電力が平滑コンデンサaつの両端
電圧を上昇させ、これによυトランジスタ素子Qlが第
6図(B)に示すパルス状電圧で駆動されていることは
上述の通りである。しかし、トランジスタ素子◇Qの故
障等によシこれが常時オンになった場合、制動用抵抗器
(19には定格以上の電流が流れてその温度が上昇する
。そのため、この制動用抵抗器α→に近接配置された温
度感応素子翰によυスイッチ接点(ハ)が14枚されて
、制動用抵抗器(至)の直列線路が遮断される。The operation of the apparatus having the above configuration will be described next. First, during normal operation of the motor α→, the switching element → is closed, and the braking resistor (19) and transistor element 00 are connected in series, and this transistor element 00 is turned off by the comparison circuit a. At this time, the motor Q4 is decelerated at time (1,), and the regenerated power increases the voltage across the smoothing capacitor a, causing the υ transistor element Ql to produce a pulsed voltage as shown in FIG. 6(B). As mentioned above, it is driven by the brake resistor (19). However, if it is constantly turned on due to a failure of the transistor element ◇ increases. Therefore, 14 υ switch contacts (c) are made by the temperature sensitive element wire placed close to this braking resistor α→, and the series line of the braking resistor (to) is cut off. .
なお、上記の構成は温度感応素子員としてバイメタル素
子によるスイッチ接点ぐ→の開、閉動作を説1]シたが
、このスイッチ接点(ハ)はバイメタル素子の発熱によ
シその接点が解放される、いわゆる自己保持型スイッチ
であるが、これはバイメタル素子の代わシに形状記1゛
は合金素子を用いても良い。Note that the above configuration assumes that the bimetal element serves as the temperature sensitive element for the opening and closing operation of the switch contact (g), but this switch contact (c) is released due to heat generation of the bimetal element. This is a so-called self-holding type switch, but instead of a bimetal element, an alloy element may be used.
以上のように、この発明によれば回生電力による制動用
抵抗器の発熱作用をある値に制限したので、制動用トラ
ンジスタ素子の故障による制動用抵抗器の過熱が未然に
防止される効果がある。As described above, according to the present invention, the heating effect of the braking resistor due to regenerated electric power is limited to a certain value, which has the effect of preventing the braking resistor from overheating due to failure of the braking transistor element. .
第1図はこの発明の一実施例による装置の概略回路図、
第2図は従来装置の回路図、第6図(A)。
(B) 、 (C)はその動作を説明するための波形図
である。
図中、αQは入力交流電源、α■は整流回路、aつは平
滑用コンデンサ素子、(1→はインバータ回路、α◆は
誘導電動機、α→は制動用抵抗器、αQは制動用トラン
ジスタ素子、αηは比較回路、0→は基準電源、(4)
は温度感応素子、Ql)はスイッチ接点である。
な分、各図中同一符号は同一または相当部分を示す。FIG. 1 is a schematic circuit diagram of a device according to an embodiment of the present invention;
FIG. 2 is a circuit diagram of a conventional device, and FIG. 6(A). (B) and (C) are waveform diagrams for explaining the operation. In the figure, αQ is the input AC power supply, α■ is the rectifier circuit, a is the smoothing capacitor element, (1→ is the inverter circuit, α◆ is the induction motor, α→ is the braking resistor, and αQ is the braking transistor element. , αη is the comparison circuit, 0→ is the reference power supply, (4)
is a temperature sensitive element and Ql) is a switch contact. The same reference numerals in each figure indicate the same or corresponding parts.
Claims (1)
を交流出力に変換するインバータ回路と、直流母線間に
接続され電動機の回生電力を消費する制動用抵抗器とト
ランジスタ素子との直列回路とより成るインバータ装置
において、制動用抵抗器に温度感応素子を近接配置する
とともに、この温度感応素子が制動用抵抗器の温度上昇
に応じて制動用抵抗器とトランジスタ素子との直列回路
を切り離すようにしたことを特徴とするインバータ装置
。It consists of a converter circuit that converts input AC to DC, an inverter circuit that converts this DC to AC output, and a series circuit of a braking resistor and transistor element that is connected between the DC bus bars and consumes the regenerated power of the motor. In an inverter device, a temperature sensitive element is disposed close to a braking resistor, and the temperature sensitive element disconnects a series circuit between the braking resistor and a transistor element in response to a rise in temperature of the braking resistor. An inverter device featuring:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11488586A JPS62277081A (en) | 1986-05-21 | 1986-05-21 | Inverter system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11488586A JPS62277081A (en) | 1986-05-21 | 1986-05-21 | Inverter system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS62277081A true JPS62277081A (en) | 1987-12-01 |
Family
ID=14649102
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11488586A Pending JPS62277081A (en) | 1986-05-21 | 1986-05-21 | Inverter system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS62277081A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6291952B1 (en) * | 1997-08-25 | 2001-09-18 | Sew-Eurodrive Gmbh & Co. | Method and circuit arrangement for operating an electromagnetically actuated mechanical brake of an electric motor |
WO2007023061A2 (en) * | 2005-08-26 | 2007-03-01 | Siemens Aktiengesellschaft | Pulse resistor (brake resistor) for a frequency converter in the higher voltage and capacity range |
GB2459883A (en) * | 2008-05-09 | 2009-11-11 | Siemens Ag | Over-temperature protection system for a braking resistor |
JP2016135056A (en) * | 2015-01-22 | 2016-07-25 | 株式会社明電舎 | Brake resistance control apparatus and brake resistance control method |
KR20180089681A (en) * | 2017-02-01 | 2018-08-09 | 엘에스산전 주식회사 | Apparatus for controlling inverter |
US20200276901A1 (en) * | 2017-09-27 | 2020-09-03 | Vitesco Technologies GmbH | Method for Determining the Temperature of an Active Layer of a Heating Resistor |
-
1986
- 1986-05-21 JP JP11488586A patent/JPS62277081A/en active Pending
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6291952B1 (en) * | 1997-08-25 | 2001-09-18 | Sew-Eurodrive Gmbh & Co. | Method and circuit arrangement for operating an electromagnetically actuated mechanical brake of an electric motor |
WO2007023061A2 (en) * | 2005-08-26 | 2007-03-01 | Siemens Aktiengesellschaft | Pulse resistor (brake resistor) for a frequency converter in the higher voltage and capacity range |
WO2007023061A3 (en) * | 2005-08-26 | 2007-09-13 | Siemens Ag | Pulse resistor (brake resistor) for a frequency converter in the higher voltage and capacity range |
US7924585B2 (en) | 2005-08-26 | 2011-04-12 | Siemens Aktiengesellschaft | Pulse resistor (brake resistor) for a frequency converter in the higher voltage and capacity range |
NO340182B1 (en) * | 2005-08-26 | 2017-03-20 | Siemens Ag | Pulse resistance |
GB2459883A (en) * | 2008-05-09 | 2009-11-11 | Siemens Ag | Over-temperature protection system for a braking resistor |
GB2459883B (en) * | 2008-05-09 | 2012-11-14 | Siemens Ag | An over-temperature protection system for a braking resistor |
JP2016135056A (en) * | 2015-01-22 | 2016-07-25 | 株式会社明電舎 | Brake resistance control apparatus and brake resistance control method |
KR20180089681A (en) * | 2017-02-01 | 2018-08-09 | 엘에스산전 주식회사 | Apparatus for controlling inverter |
US20200276901A1 (en) * | 2017-09-27 | 2020-09-03 | Vitesco Technologies GmbH | Method for Determining the Temperature of an Active Layer of a Heating Resistor |
US12071042B2 (en) * | 2017-09-27 | 2024-08-27 | Vitesco Technologies GmbH | Method for determining the temperature of an active layer of a heating resistor |
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