JPS6225883A - Absorber for regenerative power of transistor inverter - Google Patents
Absorber for regenerative power of transistor inverterInfo
- Publication number
- JPS6225883A JPS6225883A JP16552785A JP16552785A JPS6225883A JP S6225883 A JPS6225883 A JP S6225883A JP 16552785 A JP16552785 A JP 16552785A JP 16552785 A JP16552785 A JP 16552785A JP S6225883 A JPS6225883 A JP S6225883A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- regenerative power
- circuit
- comparator
- transistor
- 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
Landscapes
- Stopping Of Electric Motors (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はモータ駆動用トランジスタインバータに関し、
特に回転、停止が頻繁なサーがモータ駆動用トランジス
タインバータに関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a transistor inverter for driving a motor;
In particular, the invention relates to transistor inverters for driving motors that frequently rotate and stop.
従来、この種のサーブモータ駆動用トランジスタインバ
ータの相対値検出形回生電力吸収回路は第7図で示すよ
うに交流整流電圧−vdc′と回生電E0以上になった
時にON L、−瞬でもEc以下になった時にOFFす
る方式となっていた。第7図において、D、〜D、はダ
イオード、C1,C2はコンデンサ、R1′は固定抵抗
器、R2は回生電力吸収用固定抵抗器、OF2は比較器
、TRI〜TR5はトランジスタである。Conventionally, as shown in Fig. 7, the relative value detection type regenerative power absorption circuit of this type of transistor inverter for driving a servo motor is ON L when the AC rectified voltage -vdc' and the regenerative current exceed E0, and Ec even momentarily. It was designed to turn off when the following conditions were reached: In FIG. 7, D and D are diodes, C1 and C2 are capacitors, R1' is a fixed resistor, R2 is a fixed resistor for absorbing regenerative power, OF2 is a comparator, and TRI to TR5 are transistors.
上述した従来の相対値検出形回生電力吸収方式は、回生
電圧と交流整流電圧が単純な比較器で比較されているた
め、第8図(a)、(b)、(e)に示すようにスレッ
ショルドレベルが一点しかない、ことにより、回生時に
比較器の出力が発振現象を起し、回路全体が不安定にな
ったシ、回生電力吸収トランジスタTR5が破損するな
どの欠点がある。In the conventional relative value detection type regenerative power absorption method described above, the regenerative voltage and the AC rectified voltage are compared using a simple comparator, so as shown in Fig. 8(a), (b), and (e), Since there is only one threshold level, the output of the comparator causes oscillation during regeneration, making the entire circuit unstable and causing damage to the regenerative power absorption transistor TR5.
本発明は回路の動作の安定化を実現する回生電力吸収装
置を提供するものである。The present invention provides a regenerative power absorption device that realizes stabilization of circuit operation.
本発明は交流電源を入力にもつモータ駆動用トランジス
タインバータの相対値検出形回生電力吸収回路において
、回生電圧と交流整流電圧を比較する比#呂にヒス−?
I+・ンス蔵妊か姑今訃番とふか独活り手るトランジス
タインバータの回生電力吸収装置である。The present invention provides a relative value detection type regenerative power absorption circuit for a motor drive transistor inverter having an AC power source as an input.
This is a regenerative power absorption device for a transistor inverter, which is used by I+ and mother-in-law.
次に本発明の一実施例について図面を参照して説明する
。Next, an embodiment of the present invention will be described with reference to the drawings.
第1図は本発明の一実施例の回路図である。本例は3相
交流入力電源でDCモータを駆動するトランジスタイン
バータ回路を示している。D1〜D6は3相交流入力v
acを全波整流して主回路に直流電圧を供給するダイオ
ード、C1はその直流を平滑するコンデンサ、TRI〜
TR4は直流モータMを駆動するためのトランジスタ、
D7〜D9は3相交流入力V を全波整流するための副
回路用ダイオード、C
C2はその直流電圧の平滑と、記憶のためのコンデンサ
、R1はコンデンサC2の電荷を一定の時定数で放電さ
せるための抵抗器、OPIはヒステリシス回路を内蔵し
た比較器、Ecは基準電圧、TR5は回生電力吸収用ト
ランジスタ、R2は回生電力吸収用抵抗器である。FIG. 1 is a circuit diagram of an embodiment of the present invention. This example shows a transistor inverter circuit that drives a DC motor with a three-phase AC input power source. D1 to D6 are 3-phase AC input v
A diode that full-wave rectifies AC and supplies DC voltage to the main circuit, C1 is a capacitor that smooths the DC, TRI~
TR4 is a transistor for driving the DC motor M;
D7 to D9 are sub-circuit diodes for full-wave rectification of the three-phase AC input V, C C2 is a capacitor for smoothing the DC voltage and storing it, and R1 discharges the charge of capacitor C2 at a constant time constant. OPI is a comparator with a built-in hysteresis circuit, Ec is a reference voltage, TR5 is a transistor for absorbing regenerative power, and R2 is a resistor for absorbing regenerative power.
D1〜D6で整流された主回路電圧は+v、c、−VD
CとなってコンデンサC1に充電されている。またコン
デンサC2にも同電圧で充電されている。この時比較器
OPIの入力電圧Vi 1 r Vi 2 F!vi
1 ” ”d’c
Vi2=″″′vdc+Ec
となシ両入力電圧の差をViとすると、vi”ViI
Vi2= Vd’c (−Vdc+Ec)””−
Vd’(+V(1(4−Ec・・・(1)となる。今、
コンデンサC1とC2は同電圧であるので、
vi=”d’c+Vdc−Ec= Ee
−(2)となシ、比較器OPIはOFF
している。The main circuit voltages rectified by D1 to D6 are +v, c, -VD
C and is charged in the capacitor C1. The capacitor C2 is also charged with the same voltage. At this time, the input voltage of the comparator OPI is Vi 1 r Vi 2 F! vi
1 ""d'c Vi2=""'vdc+Ec If the difference between the two input voltages is Vi, then vi"ViI
Vi2= Vd'c (-Vdc+Ec)""-
Vd'(+V(1(4-Ec...(1).Now,
Since capacitors C1 and C2 have the same voltage, vi=”d'c+Vdc-Ec=Ee
-(2) Comparator OPI is OFF
are doing.
通常、この種のトランジスタインバータではモータを回
転時から減速させる指令を与えると、モータの回転エネ
ルギーが電源側に回生されて直流電圧子vdc、−vd
c間の電圧が上昇する回路方式になっている。この様子
を第2図(、)の破線dで示す。Normally, in this type of transistor inverter, when a command is given to decelerate the motor from rotation, the rotational energy of the motor is regenerated to the power supply side, and the DC voltage terminals vdc, -vd
The circuit system is such that the voltage between C and C increases. This state is shown by the broken line d in FIG. 2(,).
このように電圧が上昇すると、コンデンサC1、トラン
ジスタTRI〜TR4等の電圧の絶対最大定格を越えて
しまう。また、低圧モータに必要以上の高い電圧を加え
ることもモータには良くない。そこで回生電力吸収回路
が必要となる。When the voltage increases in this way, the absolute maximum ratings of the voltages of the capacitor C1, transistors TRI to TR4, etc. are exceeded. Furthermore, applying an unnecessarily high voltage to a low-voltage motor is also not good for the motor. Therefore, a regenerative power absorption circuit is required.
モータ減速時に発生した回生電圧は+Vdcを基準にと
ると、−vdcの電圧が降下することになる。そのとき
の降下電圧を−Δvdcとすると比較器OPIの入力V
iは
Vi=Vi 1−Vi 2zイd’c−(−vd。−Δ
vdc+Ec)=−ΔVd、+E。If the regenerative voltage generated during motor deceleration is taken as a reference from +Vdc, then the voltage -vdc will drop. If the voltage drop at that time is -Δvdc, the input V of the comparator OPI
i is Vi=Vi 1-Vi 2z id'c-(-vd.-Δ
vdc+Ec)=-ΔVd,+E.
・・・(3)
となる。(3)式において
Δvda > Ec+VTn
= (4)VTH:比較器OPIのヒス
テリシス電圧
のとき比較器OP1はONする。その様子を第2図(b
)が示している。このとぎトランジスタTR5がONし
、抵抗器R2に第2図(c)に示す電流Ibが流れる。...(3) becomes. In formula (3), Δvda > Ec+VTn
= (4) VTH: When the hysteresis voltage of comparator OPI is present, comparator OP1 is turned on. The situation is shown in Figure 2 (b
) is shown. This switching transistor TR5 is turned on, and a current Ib shown in FIG. 2(c) flows through the resistor R2.
ON [、ている期間電流Ibによシ抵抗器R2にIb
Rの電力が消費され、+vact−Vac間の電圧が下
がシ、下式の条件を満足出来なくなると比較器OPIが
OFFし、回生電力吸収回路がOFFする。ON [, during the period when current Ib is applied to resistor R2, Ib
When the power of R is consumed and the voltage between +vact and Vac decreases, and the condition of the formula below cannot be satisfied, the comparator OPI is turned off and the regenerative power absorption circuit is turned off.
Δvd c > Ec VTH・・・(5)ここで(5
)式の右辺の第2項に負号がついているのレナ
1し 畠fl !I!! Ql)1/7’1 し2
斗II Xi y /7’l ’bh
J!L 11 ゑ 2、この状態でモータがまだ減速
中であれば、再び主回路電圧が上昇し、第2図(a)で
示すように同様の動作を繰シ返す。このようにして主回
路電圧がほぼ一定に保たれる。Δvd c > Ec VTH...(5) Here, (5
) The second term on the right side of the equation has a negative sign.
1st Hatake fl! I! ! Ql) 1/7'1 shi2
Dou II Xi y /7'l 'bh
J! L 11 E 2 If the motor is still decelerating in this state, the main circuit voltage will rise again and the same operation will be repeated as shown in FIG. 2(a). In this way, the main circuit voltage is kept approximately constant.
ここでVa(+の電圧が変ったとしよう。それにつれて
+vd c p vd c * Vd’cも変化すルカ
、(4) 式、(5) 式11Cはそれらの項が含まれ
ないため、Va、jC関わシなく回生電力吸収回路が動
作する。この様子を第3図が示す。Here, let us assume that the voltage of Va(+ changes. +vd c p vd c * Vd'c also changes accordingly. Equations (4) and (5) Equation 11C do not include these terms, so Va, The regenerative power absorption circuit operates regardless of JC. This situation is shown in FIG.
第4図は本発明の別の実施例である。副回路用の整流器
を2ケ省略して1ケにし、3相半波整流したものである
。第5図は単相電源入力のトランジスタインバータ回路
に本発明を適用した実施例である。この場合副回路用の
整流器は単相全波整流している。第6図は単相電源入力
とした場合であるが、副回路用の整流器は単相半波整流
になっている。第4図〜第6図の基本的動作は第1図と
全く同じである。FIG. 4 shows another embodiment of the invention. Two rectifiers for the sub-circuit are omitted, leaving only one rectifier, and three-phase half-wave rectification is performed. FIG. 5 shows an embodiment in which the present invention is applied to a transistor inverter circuit with a single-phase power input. In this case, the rectifier for the subcircuit performs single-phase full-wave rectification. Although FIG. 6 shows a case where a single-phase power supply is input, the rectifier for the sub-circuit is a single-phase half-wave rectifier. The basic operations in FIGS. 4 to 6 are exactly the same as in FIG. 1.
以上説明したように本発明は相対値検出形回生電力吸収
回路の比較器にヒステリシス特性を与えたことによシ、
回路全体の動作の安定化が図れると共に信頼性の向上が
図れるという効果がある。As explained above, the present invention provides hysteresis characteristics to the comparator of the relative value detection type regenerative power absorption circuit.
This has the effect of stabilizing the operation of the entire circuit and improving reliability.
第1図は本発明を200 V 3相交流入力のインバー
タに応用した場合の実施例を示す回路図、第2図はその
動作タイムチャートで、(、)は回生電圧波形図、(b
)は比較器出力波形図、(C)は回生電力吸収用抵抗器
の電流波形図、第3図は3相交流入力電圧をZoo V
にした場合の回生電圧波形図1.第4図は3相交流入力
のインバータに記憶回路用として3相半波整流回路とし
た実施例を示す回路図、第5図は単相交流入力のインバ
ータに応用した場合の実施例を示す回路図、第6図は単
相交流入力のインバータに記憶回路用として単相半波回
路とした実施例を示す回路図、第7図は従来の回路方式
の一例を示す回路図、第8図はその動作タイムチャート
を示す。
D1〜D9・・・整流器、C1〜C2・・・コンデンサ
、R1・・・固定抵抗器、R2・・・回生電力吸収用固
定抵抗器、OPI・・・ヒステリシス内蔵比較器、OF
2・・・比較器、Eo・・・基準電圧、 TRI〜TR
5・・・トランジスタ、M・・・DCモータ。
;辷ご
簡閲
十■紀
第8図Fig. 1 is a circuit diagram showing an embodiment in which the present invention is applied to an inverter with 200 V three-phase AC input, Fig. 2 is its operation time chart, (,) is a regenerative voltage waveform diagram, and (b)
) is a comparator output waveform diagram, (C) is a current waveform diagram of a regenerative power absorption resistor, and Figure 3 is a three-phase AC input voltage diagram.
Regenerative voltage waveform when 1. Figure 4 is a circuit diagram showing an example of a three-phase half-wave rectifier circuit for a storage circuit in a three-phase AC input inverter, and Figure 5 is a circuit diagram showing an example of application to a single-phase AC input inverter. Figure 6 is a circuit diagram showing an embodiment of a single-phase half-wave circuit for a storage circuit in an inverter with single-phase AC input, Figure 7 is a circuit diagram showing an example of a conventional circuit system, and Figure 8 is a circuit diagram showing an example of a conventional circuit system. The operation time chart is shown below. D1-D9... Rectifier, C1-C2... Capacitor, R1... Fixed resistor, R2... Fixed resistor for absorbing regenerative power, OPI... Comparator with built-in hysteresis, OF
2...Comparator, Eo...Reference voltage, TRI~TR
5...Transistor, M...DC motor. ;Simplified reading of the 10th century, Figure 8
Claims (1)
インバータの相対値検出形回生電力吸収回路において、
回生電圧と交流整流電圧とを比較する比較器にヒステリ
シス特性を持たせたことを特徴とするトランジスタイン
バータの回生電力吸収装置。(1) In a relative value detection type regenerative power absorption circuit for a motor drive transistor inverter that has an AC power source as input,
A regenerative power absorption device for a transistor inverter, characterized in that a comparator that compares regenerative voltage and AC rectified voltage has hysteresis characteristics.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16552785A JPS6225883A (en) | 1985-07-26 | 1985-07-26 | Absorber for regenerative power of transistor inverter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16552785A JPS6225883A (en) | 1985-07-26 | 1985-07-26 | Absorber for regenerative power of transistor inverter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6225883A true JPS6225883A (en) | 1987-02-03 |
Family
ID=15814084
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16552785A Pending JPS6225883A (en) | 1985-07-26 | 1985-07-26 | Absorber for regenerative power of transistor inverter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6225883A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5034669A (en) * | 1989-10-04 | 1991-07-23 | Mitsubishi Denki Kabushiki Kaisha | Regenerative circuit for motor drive system having leakage current compensation |
JPH04261391A (en) * | 1990-12-25 | 1992-09-17 | Mitsubishi Electric Corp | Controller for air-conditioner |
-
1985
- 1985-07-26 JP JP16552785A patent/JPS6225883A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5034669A (en) * | 1989-10-04 | 1991-07-23 | Mitsubishi Denki Kabushiki Kaisha | Regenerative circuit for motor drive system having leakage current compensation |
JPH04261391A (en) * | 1990-12-25 | 1992-09-17 | Mitsubishi Electric Corp | Controller for air-conditioner |
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