JPH01311617A - Switching element drive device - Google Patents
Switching element drive deviceInfo
- Publication number
- JPH01311617A JPH01311617A JP63142567A JP14256788A JPH01311617A JP H01311617 A JPH01311617 A JP H01311617A JP 63142567 A JP63142567 A JP 63142567A JP 14256788 A JP14256788 A JP 14256788A JP H01311617 A JPH01311617 A JP H01311617A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- drive
- switching element
- power supply
- output 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.)
- Granted
Links
Landscapes
- Cookers (AREA)
- Control Of Voltage And Current In General (AREA)
- Inverter Devices (AREA)
- Electronic Switches (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は電圧駆動形スイッチング素子の駆動装置に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a driving device for voltage-driven switching elements.
従来の技術
従来、この種の駆動装置は第２図に示すように構成され
ている。ドライブ用直流電源１に接続されたドライブ部
６はＮＰＮトランジスタ２とＰＮＰトランジスタ３にて
ドライブ終段を形成している。ドライブ終段の入力側に
はプリドライブ用のＮＰＮトランジスタ４が設けられて
いる。抵抗５は、制御部７からの出力信号の反転および
レベルシフトを行っている。８は制御部７に電力を供給
する制御用Ｍ、流電源である。ここでは、ＰＮＰ）ラン
ジスタ３のエミッタ・コレクタ間に、制御部７の出力信
号の周期とデユティ−に応じたレベルの出力電圧■が発
生し、この出力電圧によって後段に接続された電圧駆動
形スイッチング素？９〔たとえば、ＭＯ８型電界効果ト
ランジスタなど〕が駆動されている。2. Description of the Related Art Conventionally, this type of drive device has been constructed as shown in FIG. A drive unit 6 connected to a drive DC power supply 1 includes an NPN transistor 2 and a PNP transistor 3 forming a drive final stage. An NPN transistor 4 for pre-drive is provided on the input side of the drive final stage. The resistor 5 performs inversion and level shifting of the output signal from the control section 7. Reference numeral 8 denotes a control M, which supplies power to the control section 7, and a current power supply. Here, an output voltage (■) with a level corresponding to the period and duty of the output signal of the control unit 7 is generated between the emitter and collector of the PNP transistor 3, and this output voltage is used to control the voltage-driven switching connected to the subsequent stage. Plain? 9 (for example, an MO8 type field effect transistor) is driven.
発明が解決しようとする課題
このような従来の構成では、ドライブ用直流電源１や制
御用直流な源８の電源立上り時や低圧時において不安定
な動作を起こすことがあり、その結果、出力電圧Ｖのレ
ベルが前記電圧駆動形スイッチング素子９のズレッショ
ルド電圧を越えることがあり、電圧駆動形スイッチング
素子９をターンオンさせ破壊させることがある。Problems to be Solved by the Invention In such a conventional configuration, unstable operation may occur when the drive DC power source 1 and the control DC source 8 are turned on or at low voltage, and as a result, the output voltage The level of V may exceed the threshold voltage of the voltage-driven switching element 9, which may turn on the voltage-driven switching element 9 and destroy it.
本発明はドライブ用直流電源、制御用直流電源が所定の
値以下の状態におけるスイッチング素子を保護できる駆
動装置を提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a drive device that can protect switching elements when the drive DC power supply and the control DC power supply are below a predetermined value.
課肋を解決するための手段
本発明の駆動装置は、ドライブ用直流電源に接続された
ドライブ部に制御部からオン・オフの出力信号を与え、
前記ドライブ部の出力に発生する出力電圧で電圧駆動形
スイッチング素子を駆動するとともに、前記制御部の電
源である制御用直流電源と前記ドライブ用直流電源の少
なくとも一方の電源の電圧が規定値以下に低下している
ことを検出して前記ドライブ部の前記出力電圧をオフす
るリセット手段を設けたことを特徴とする。Means for Solving the Problems The drive device of the present invention provides an on/off output signal from a control unit to a drive unit connected to a drive DC power supply,
The voltage-driven switching element is driven by the output voltage generated at the output of the drive unit, and the voltage of at least one of the control DC power supply and the drive DC power supply, which are the power supplies of the control unit, is lower than a specified value. The present invention is characterized in that a reset means is provided for detecting that the output voltage has decreased and turning off the output voltage of the drive section.
作用
この構成によると、ドライブ用直流電源３制御用直流電
源の電源立上り時や低圧時において不安定な動作を起こ
すときに、リセット手段がドライブ部の駆動出力電圧を
オフしてスイッチング素子を保護する。Effect: According to this configuration, when the drive DC power supply 3 causes unstable operation when the control DC power supply is turned on or at low voltage, the reset means turns off the drive output voltage of the drive section to protect the switching element. .
実施例 以下、本発明の一実施例を第１図に基づいて説明する。Example An embodiment of the present invention will be described below with reference to FIG.
なお、従来例を示す第２図と同様の作用をなすものには
同一の符号を付けて説明する。Components having the same functions as those in FIG. 2 showing the conventional example will be described with the same reference numerals.
第１図は本発明の駆動装置を示し、リセット手段１０が
設けられている点が第２図とは異なっている。リセット
手段１０は比較部１１とＮＰＮ）−ランジスタ１２とで
構成されており、ここで比較部１１はドライブ用直流電
源１の電圧Ｅ１と制御用直流電源の出力電圧Ｅ８とを被
比較入力とし、電圧Ｅ１と第１の設定電圧ＥＩＯを比較
し、電圧Ｅ８と第２のｔλ定電圧Ｅ８０を比較し、Ｅｌ
≦Ｅ１０とＥｓ＜ｒｙｓ。FIG. 1 shows a driving device of the present invention, which differs from FIG. 2 in that a reset means 10 is provided. The reset means 10 is composed of a comparator 11 and an NPN transistor 12, where the comparator 11 uses the voltage E1 of the drive DC power supply 1 and the output voltage E8 of the control DC power supply as inputs to be compared, Voltage E1 is compared with first set voltage EIO, voltage E8 is compared with second tλ constant voltage E80, and El
≦E10 and Es<rys.
の論理和でＮＰＮトランジスタ１２にオン信号が出力さ
れ、トランジスタ１２がオンするとトランジスタ２．３
のベース電位が基準レベルになって、出力Ｍｉ Ｉｎ
Ｖがオフされてスイッチング素子９が保護される。Ｅｌ
＞ＥｌｏでかつＥｓ＞Ｅｓ０の状態を比較部１１が検出
してから！−ランジスタ１２がオフになって、スイッチ
ング素子９の駆動が再開される。An on signal is output to the NPN transistor 12 by the logical sum of
The base potential of becomes the reference level, and the output Mi In
V is turned off and the switching element 9 is protected. El
After the comparison unit 11 detects the state where >Elo and Es>Es0! - The transistor 12 is turned off and the driving of the switching element 9 is restarted.
上記の実施例では比較部１１に電圧Ｅ１とＥｓの両方が
被比較入力として接続されていたが、ドライブ用直流電
源１がＥｌｏにまで低下することがない場合には比較部
１１に電圧Ｅ８だけを接続し、比較部１１はＥ８≦Ｅ８
０を検出したときから少なくともＥｓ＞Ｅｓ０を検出す
るまでトランジスタ１２をオンさせるように構成される
。同様に、制御用直流電源８がＥｓ０にまで低下するこ
とがない場合には比較部１１に電圧Ｅ１だけを接続し、
Ｅ１≦ＥＩＯを検出したときから少なくともＥｌ＞Ｅｌ
ｏを検出するまでトランジスタ１２をオンさせるように
構成される。In the above embodiment, both voltages E1 and Es are connected to the comparator 11 as compared inputs, but if the drive DC power supply 1 does not drop to Elo, only the voltage E8 is connected to the comparator 11. and the comparison unit 11 makes sure that E8≦E8.
The transistor 12 is turned on from when Es0 is detected until at least Es>Es0 is detected. Similarly, if the control DC power supply 8 does not drop to Es0, only the voltage E1 is connected to the comparator 11,
At least El>El from the time E1≦EIO is detected
The transistor 12 is configured to be turned on until o is detected.
発明の効果
以上のように本発明によると、制御部の電源である制御
用直流電源とドライブ用直流電源の少なくとも一方の電
源の電圧が規定値以下に低下していることを検出してド
ライブ部の出力電圧をオフするりセット手段を設けたた
め、前記出力電圧で駆動されるスイッチング素子に高い
電圧が印加される不安定な状態が発生すると、ドライブ
部の出力電圧をリセット手段が自動的にオフして、スイ
ッチング素子を確実に破壊という最悪のｉ態から保護で
きるものである。Effects of the Invention As described above, according to the present invention, when it is detected that the voltage of at least one of the control DC power supply and the drive DC power supply, which are the power supplies of the control unit, has fallen below a specified value, the drive unit Since a means for resetting the output voltage of the drive section is provided, when an unstable condition occurs in which a high voltage is applied to the switching element driven by the output voltage, the means for resetting the output voltage of the drive section is automatically turned off. Thus, the switching element can be reliably protected from the worst case of destruction.
第１図は本発明の一実施例の駆動装置の構成図、第２図
は従来の駆！ｖＩ装置の構成図である。
１・・・ドライブ用直流電源、６・・・ドライブ部、７
・・・制御部、８・・・制御用直流電源、９・・・電圧
駆動形スイッチング素子、１０・・・リセット手段。
代理人 森 本 義 弘
第１図
、ｂｒライフ゛邪
１０ ソＣ・ＩＦ 手＃ｑ
第２図
、６Ｆライフ゛部
ｆ−１：ライフ゛°＃４直流＠５＃
１３ ｉｌ１行ＰＩＩＩＡ流電源
Ｖ −出か電圧FIG. 1 is a block diagram of a drive device according to an embodiment of the present invention, and FIG. 2 is a diagram of a conventional drive device. FIG. 3 is a configuration diagram of a vI device. 1... DC power supply for drive, 6... Drive section, 7
. . . control unit, 8 . . . DC power supply for control, 9 . . . voltage-driven switching element, 10 . . . reset means. Agent Yoshihiro Morimoto Figure 1, BR Life 10 SoC/IF Hand #q Figure 2, 6F Life section f-1: Life ° #4 DC @5 # 13 il 1 line PIIIA power supply V - Out? Voltage
Claims (1)
部からオン・オフの出力信号を与え、前記ドライブ部の
出力に発生する出力電圧で電圧駆動形スイッチング素子
を駆動するとともに、前記制御部の電源である制御用直
流電源と前記ドライブ用直流電源の少なくとも一方の電
源の電圧が規定値以下に低下していることを検出して前
記ドライブ部の前記出力電圧をオフするリセット手段を
設けたスイッチング素子駆動装置。1. Give an on/off output signal from the control unit to the drive unit connected to the drive DC power supply, drive the voltage-driven switching element with the output voltage generated at the output of the drive unit, and Switching comprising a reset means for detecting that the voltage of at least one of the control DC power supply and the drive DC power supply, which are power supplies, has fallen below a specified value and turning off the output voltage of the drive unit. Element drive device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63142567A JP2730729B2 (en) | 1988-06-09 | 1988-06-09 | Switching element drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63142567A JP2730729B2 (en) | 1988-06-09 | 1988-06-09 | Switching element drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01311617A true JPH01311617A (en) | 1989-12-15 |
| JP2730729B2 JP2730729B2 (en) | 1998-03-25 |
Family
ID=15318329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63142567A Expired - Lifetime JP2730729B2 (en) | 1988-06-09 | 1988-06-09 | Switching element drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2730729B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007035529A (en) * | 2005-07-29 | 2007-02-08 | Matsushita Electric Ind Co Ltd | Induction heating device |
| JP2007035528A (en) * | 2005-07-29 | 2007-02-08 | Matsushita Electric Ind Co Ltd | Induction heating device |
| JP2011041622A (en) * | 2009-08-20 | 2011-03-03 | Panasonic Corp | Rice cooker |
| JP2011041623A (en) * | 2009-08-20 | 2011-03-03 | Panasonic Corp | Rice cooker |
| JP2011078570A (en) * | 2009-10-07 | 2011-04-21 | Panasonic Corp | Induction heating rice cooker |
| CN104905674A (en) * | 2015-06-25 | 2015-09-16 | 南昌大学 | Electric pressure cooker and power-on and power-off control circuit thereof |
| JP2017098823A (en) * | 2015-11-26 | 2017-06-01 | 株式会社デンソー | Load drive circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6183318U (en) * | 1984-11-05 | 1986-06-02 | ||
| JPS61265917A (en) * | 1985-05-21 | 1986-11-25 | Fuji Electric Co Ltd | Load drive circuit |
| JPS62114524U (en) * | 1986-01-09 | 1987-07-21 | ||
| JPS6344170U (en) * | 1986-09-09 | 1988-03-24 |
-
1988
- 1988-06-09 JP JP63142567A patent/JP2730729B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6183318U (en) * | 1984-11-05 | 1986-06-02 | ||
| JPS61265917A (en) * | 1985-05-21 | 1986-11-25 | Fuji Electric Co Ltd | Load drive circuit |
| JPS62114524U (en) * | 1986-01-09 | 1987-07-21 | ||
| JPS6344170U (en) * | 1986-09-09 | 1988-03-24 |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007035529A (en) * | 2005-07-29 | 2007-02-08 | Matsushita Electric Ind Co Ltd | Induction heating device |
| JP2007035528A (en) * | 2005-07-29 | 2007-02-08 | Matsushita Electric Ind Co Ltd | Induction heating device |
| JP2011041622A (en) * | 2009-08-20 | 2011-03-03 | Panasonic Corp | Rice cooker |
| JP2011041623A (en) * | 2009-08-20 | 2011-03-03 | Panasonic Corp | Rice cooker |
| JP2011078570A (en) * | 2009-10-07 | 2011-04-21 | Panasonic Corp | Induction heating rice cooker |
| CN104905674A (en) * | 2015-06-25 | 2015-09-16 | 南昌大学 | Electric pressure cooker and power-on and power-off control circuit thereof |
| JP2017098823A (en) * | 2015-11-26 | 2017-06-01 | 株式会社デンソー | Load drive circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2730729B2 (en) | 1998-03-25 |
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