JPH0345846B2 - - Google Patents
Info
- Publication number
- JPH0345846B2 JPH0345846B2 JP58210235A JP21023583A JPH0345846B2 JP H0345846 B2 JPH0345846 B2 JP H0345846B2 JP 58210235 A JP58210235 A JP 58210235A JP 21023583 A JP21023583 A JP 21023583A JP H0345846 B2 JPH0345846 B2 JP H0345846B2
- Authority
- JP
- Japan
- Prior art keywords
- relay
- phase
- current
- signal
- synchronization signal
- 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
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 11
- 230000001360 synchronised effect Effects 0.000 claims description 8
- 238000010891 electric arc Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Keying Circuit Devices (AREA)
- Relay Circuits (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、交流電源に接続した負荷をオン・オ
フするリレー接点の開閉を制御するリレー駆動装
置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a relay drive device that controls opening and closing of relay contacts that turn on and off a load connected to an AC power source.
従来例の構成とその問題点
一般に、機械的接点を有するリレーにおいて
は、リレー接点の接触抵抗による電力損失が、半
導体スイツチング素子のオン抵抗による電力損失
よりも十分に小さいため、大きな負荷電流を流す
ことができるとともに放熱板を用いる必要がない
という特長をもつている。しかし、負荷電流の開
閉時に接点間がアーク放電が起きるので接点の劣
化が著しくなり、開閉頻度を余り多くできず、ま
た信頼性が悪いという欠点を有していた。Conventional configurations and their problems In general, in relays with mechanical contacts, the power loss due to the contact resistance of the relay contacts is sufficiently smaller than the power loss due to the on-resistance of the semiconductor switching element, so large load currents cannot be passed. It has the advantage of not only being able to do this, but also not requiring the use of a heat sink. However, arc discharge occurs between the contacts when the load current is switched on and off, resulting in significant deterioration of the contacts, making it difficult to open and close them very frequently, and having poor reliability.
発明の目的
本発明の目的は、上記問題点を解消するために
リレー接点を流れる電流の零位相でリレー接点の
開閉を行うことができるリレー駆動装置を提供す
ることである。OBJECTS OF THE INVENTION An object of the present invention is to provide a relay drive device that can open and close relay contacts at zero phase of the current flowing through the relay contacts, in order to solve the above-mentioned problems.
発明の構成
本発明のリレー駆動装置は、交流電源電圧の零
位相に同期した信号を発生する電圧同期信号発生
手段と、リレー接点を流れる電流の零位相に同期
した信号を発生する電流同期信号発生手段と、前
記リレー接点が開閉した位相を入力する開閉位相
入力手段と、前記電圧同期信号発生手段からの電
圧同期信号と前記電流同期信号発生手段からの電
流同期信号と前記開閉位相入力手段からの開閉信
号とを各々入力しリレーコイルを駆動する位相を
決定する駆動位相決定手段を有する制御部と、前
記制御部からの出力信号によつて前記リレーコイ
ルを駆動するリレー駆動手段とを備え、前記駆動
位相決定手段は、リレーを閉成する位相を前記電
圧同期信号と開閉信号により決定し、リレーを開
成する位相を前記電流同期信号と開閉信号により
決定する構成とし、リレーに接続した負荷が誘導
性あるいは容量性のもので電流が電圧に対して遅
れるあるいは進む場合においても、その電流の零
位相を検出することでその電流の零位相に同期さ
せてリレーを開成することができ、負荷の種類に
かかわりなくアークの発生を防止できる。Composition of the Invention The relay driving device of the present invention includes a voltage synchronization signal generation means for generating a signal synchronized with the zero phase of an AC power supply voltage, and a current synchronization signal generation means for generating a signal synchronized with the zero phase of the current flowing through the relay contacts. means for inputting the open/close phase of the relay contact; a voltage synchronization signal from the voltage synchronization signal generation means; a current synchronization signal from the current synchronization signal generation means; a control section having drive phase determining means for inputting open/close signals and determining a phase for driving the relay coil; and a relay drive means for driving the relay coil according to an output signal from the control section. The drive phase determining means is configured to determine the phase for closing the relay using the voltage synchronization signal and the opening/closing signal, and determining the phase for opening the relay based on the current synchronization signal and the opening/closing signal, so that the load connected to the relay is Even if the current lags behind or leads the voltage due to a static or capacitive type, by detecting the zero phase of the current, it is possible to open the relay in synchronization with the zero phase of the current, and it is possible to open the relay in synchronization with the zero phase of the current. Arcing can be prevented regardless of the situation.
実施例の説明
第１図は本発明の一実施例を示すもので、１は
交流電源、２は直流電源、３は負荷、４は負荷３
に直列接続したリレー接点、５は交流電源１の零
電圧位相に同期した信号を発生する電圧同期信号
発生手段、６はリレー接点４に流れる電流の零位
相に同期した信号を発生する電流同期信号発生手
段、７はリレー接点４が開閉した位相を入力する
開閉位相入力手段、８はマイクロコンピユータよ
りなる制御部、９は制御部８からの出力信号によ
つてリレーを駆動するリレー駆動手段である。前
記電圧同期信号発生手段５はダイオードブリツジ
１０、抵抗１１，１２、フオトカプラ１３より構
成されている。電流同期信号発生手段６は、リレ
ー接点４を流れる電流を検出するカレントトラン
ス１４、ダイオードブリツジ１５、抵抗１６，１
７，１８，１９，２０，２１、コンパレータ２２
より構成されている。開閉位相検知手段７は、ダ
イオードブリツジ２３、抵抗２４，２５、フオト
カプラ２６、積分用コンデンサ２７より構成され
ている。またリレー駆動手段９は、リレーコイル
２８、サージ吸収用ダイオード２９、トランジス
タ３０、抵抗３１より構成されている。制御部８
は、CPU、ROM、RAM、入出力ポート等よる
構成され、ROM内に前記電圧同期信号発生手段
５からの電圧同期信号と電流同期信号発生手段６
からの電流同期信号及び開閉位相入力手段７から
の開閉信号を入力する。そして、リレーコイルの
駆動位相を、リレー接点４を流れる電流が零とな
るような位相で開閉するような位相に決定し、駆
動信号を出力する駆動位相決定手段を有してい
る。第２図にその一例を示したフローチヤート
を、第３図にはその動作を説明している。DESCRIPTION OF EMBODIMENTS FIG. 1 shows an embodiment of the present invention, in which 1 is an AC power supply, 2 is a DC power supply, 3 is a load, and 4 is a load 3.
5 is a voltage synchronization signal generating means that generates a signal synchronized with the zero voltage phase of the AC power source 1; 6 is a current synchronization signal that generates a signal synchronized with the zero phase of the current flowing through the relay contact 4; 7 is an open/close phase input means for inputting the open/closed phase of the relay contact 4; 8 is a control section composed of a microcomputer; 9 is a relay drive means for driving the relay by an output signal from the control section 8. . The voltage synchronization signal generating means 5 is composed of a diode bridge 10, resistors 11 and 12, and a photocoupler 13. The current synchronization signal generating means 6 includes a current transformer 14 that detects the current flowing through the relay contact 4, a diode bridge 15, and resistors 16, 1.
7, 18, 19, 20, 21, comparator 22
It is composed of The open/close phase detection means 7 is composed of a diode bridge 23, resistors 24 and 25, a photocoupler 26, and an integrating capacitor 27. Further, the relay driving means 9 includes a relay coil 28, a surge absorbing diode 29, a transistor 30, and a resistor 31. Control unit 8
is composed of a CPU, ROM, RAM, input/output ports, etc., and the voltage synchronization signal from the voltage synchronization signal generation means 5 and the current synchronization signal generation means 6 are stored in the ROM.
The current synchronization signal from the input means 7 and the opening/closing signal from the opening/closing phase input means 7 are input. The relay coil has drive phase determining means for determining the drive phase of the relay coil to be such that the relay coil is opened and closed at a phase such that the current flowing through the relay contact 4 becomes zero, and outputting a drive signal. FIG. 2 is a flowchart showing an example of this, and FIG. 3 explains its operation.
次に上記のように構成したリレー駆動装置の動
作を説明する。第２図のフローチヤートで示すよ
うに、リレー接点を開閉する場合は、同期信号が
入力（ステツプ50）されてから、RAMに記憶さ
れている遅延時間が経過（ステツプ51、52）した
のち駆動信号を出力もしくは停止する（ステツプ
53）。ステツプ54、55、56で、駆動信号が出力も
しくは停止してから、開閉信号が入力されるまで
の時間（開：tpo、閉：tpffとする。）を測定し、同
期信号の周期から減算を行つて次回の開閉時間の
遅延時間を演算する（ステツプ57）。第３図に示
すように、リレー接点４を閉じる場合は、交流電
源電圧ａ−ｂの零位相に同期した電圧同期信号ｃ
から遅延時間t0だけ遅れた位相で駆動信号d0を出
力し、開閉位相信号e0の立下りまでの時間tpoを測
定し、交流電源電圧の周期Ｔからこの時間tpoを
減産した値を次回の接点閉時の遅延時間t0′とし
てRAMに一時記憶する。他方、リレー接点を開
く場合は、負荷電流ｆ−ｇの電流位相に同期した
電流同期信号ｈを入力し遅延時間t1だけ遅らせた
位相で駆動信号を停止（第３図d1）し、開閉信号
e1の立上りまでの時間tpffを測定し、負荷電流の
周期Ｔ（電流電圧の周期と同じ）からこの時間tpff
を減算した値を次回の遅延時間t1′とする。時間
tpo及びtpffは、リレーの動作時間及び復帰時間で
リレー個々によつて異なる値であるので、時間
tpo，tpff、遅延時間t0，t1は各々RAM内に記憶さ
れている。 Next, the operation of the relay drive device configured as described above will be explained. As shown in the flowchart in Figure 2, when opening or closing the relay contacts, the relay contacts are activated after the delay time stored in the RAM has elapsed (steps 51 and 52) after the synchronization signal is input (step 50). Output or stop the signal (step
53). In steps 54, 55, and 56, the time from when the drive signal is output or stopped until the opening/closing signal is input (open: tpo , close: tpff ) is measured, and the time is calculated from the period of the synchronization signal. By performing subtraction, the delay time for the next opening/closing time is calculated (step 57). As shown in FIG. 3, when closing the relay contact 4, a voltage synchronization signal c synchronized with the zero phase of the AC power supply voltage a-b is applied.
Output the drive signal d 0 with a phase delayed by the delay time t 0 from 0, measure the time t po until the falling edge of the opening/closing phase signal e 0 , and calculate the value obtained by subtracting this time t po from the cycle T of the AC power supply voltage. is temporarily stored in RAM as the delay time t 0 ' for the next time the contact closes. On the other hand, when opening the relay contact, input the current synchronization signal h synchronized with the current phase of the load current fg, stop the drive signal at a phase delayed by the delay time t1 (Fig. 3 d1), and open / close the contact. signal
Measure the time t pff until the rise of e 1 , and calculate this time t pff from the load current period T (same as the current and voltage period).
The value obtained by subtracting is set as the next delay time t 1 ′. time
t po and t pff are the operating time and return time of the relay, and the values differ depending on each relay, so the time
t po , t pff , and delay times t 0 and t 1 are each stored in the RAM.
このように実施例におけるリレー駆動装置は、
第２図に示したフローチヤートの動作を繰り返す
ことにより、リレー接点を流れる負荷電流が零の
位相でリレー接点が開閉するように、リレー駆動
位相を決定する（リレー接点を閉じる場合は、負
荷電流が流れていないので、電源電圧が零の位相
で閉じる）。従つてリレー接点開閉時の電流は、
常に零となり、アーク放電の発生を著しく低減で
きる。又、電流の零位相に従つて接点を閉じるた
め電源電圧の零位相と電流の零位相が異なる負荷
にも有用である。 In this way, the relay drive device in the embodiment is
By repeating the operation of the flowchart shown in Figure 2, the relay drive phase is determined so that the relay contact opens and closes in the phase when the load current flowing through the relay contact is zero (when closing the relay contact, the load current is not flowing, so it closes at the phase when the power supply voltage is zero). Therefore, the current when the relay contacts open and close is
It is always zero, and the occurrence of arc discharge can be significantly reduced. Furthermore, since the contacts are closed according to the zero phase of the current, it is useful for loads where the zero phase of the power supply voltage and the zero phase of the current are different.
尚、本発明の実施例では、リレーの動作時間と
復帰時間を、開閉毎に測定するようにしたが、固
定した値として、ROMに記憶させることもでき
る。 In the embodiment of the present invention, the operating time and return time of the relay are measured each time the relay is opened or closed, but they can also be stored in the ROM as fixed values.
発明の効果
以上の説明から明らかなように、本発明のリレ
ー駆動装置によれば、接点開閉時の電流が零とな
るために、負荷の開閉時に接点間で起きるアーク
放電が抑えられ、接点の寿命が著しく向上し、且
つ、寿命のバラツキも小さくすることができ、信
頼性が向上し、小電力用の接点で大電力のデユー
テイ制御が可能となる等、工業的価値の大なるも
のである。また、電流同期信号発生手段を設けて
いるので、負荷の種類（誘導性、容量性等）によ
り電流が電圧に対して進んだり遅れたりしても電
流の零位相でリレーを開とすることができ、負荷
の種類にかかわりなくアークの発生を防止でき
る。Effects of the Invention As is clear from the above description, according to the relay drive device of the present invention, the current when the contacts open and close becomes zero, so arc discharge that occurs between the contacts when switching the load is suppressed, and the contact It has great industrial value, as it significantly improves lifespan, reduces variation in lifespan, improves reliability, and enables high-power duty control with low-power contacts. . In addition, since a current synchronization signal generation means is provided, even if the current leads or lags the voltage depending on the type of load (inductive, capacitive, etc.), the relay can be opened at the zero phase of the current. It is possible to prevent arcing regardless of the type of load.
第１図は本発明の一実施例を示すリレー駆動装
置の回路図、第２図は同装置の動作フローチヤー
ト図、第３図は同装置の動作説明図である。
１……交流電源、２……直流電源、３……負
荷、４……リレー接点、５……電圧同期信号発生
手段、６……電流同期信号発生手段、７……開閉
位相入力手段、８……制御部、９……リレー駆動
手段。
FIG. 1 is a circuit diagram of a relay driving device showing an embodiment of the present invention, FIG. 2 is an operational flowchart of the device, and FIG. 3 is an explanatory diagram of the operation of the device. DESCRIPTION OF SYMBOLS 1...AC power supply, 2...DC power supply, 3...Load, 4...Relay contact, 5...Voltage synchronization signal generation means, 6...Current synchronization signal generation means, 7...Opening/closing phase input means, 8 . . . Control unit, 9 . . . Relay driving means.
Claims (1)
する電圧同期信号発生手段と、リレー接点を流れ
る電流の零位相に同期した信号を発生する電流同
期信号発生手段と、前記リレー接点が開閉した位
相を入力する開閉位相入力手段と、前記電圧同期
信号発生手段からの電圧同期信号と前記電流同期
信号発生手段からの電流同期信号と前記開閉位相
入力手段からの開閉信号とを各々入力し、リレー
コイルを駆動する位相を決定する駆動位相決定手
段を有する制御部と、前記制御部からの出力信号
によつて前記リレーコイルを駆動するリレー駆動
手段とを備え、前記駆動位相決定手段は、リレー
閉成する位相を前記電圧同期信号と開閉信号によ
り決定し、リレー開成する位相を前記電流同期信
号と開閉信号により決定する構成としたリレー駆
動装置。1 Voltage synchronization signal generation means that generates a signal synchronized with the zero phase of the AC power supply voltage, current synchronization signal generation means that generates a signal synchronized with the zero phase of the current flowing through the relay contact, and the phase at which the relay contact opens and closes. a voltage synchronizing signal from the voltage synchronizing signal generating means, a current synchronizing signal from the current synchronizing signal generating means, and an opening/closing signal from the switching phase input means. a control section having a drive phase determining means for determining a phase for driving the relay coil; and a relay driving means for driving the relay coil according to an output signal from the control section, the drive phase determining means having a drive phase determining means for determining a phase when the relay is closed. The relay driving device is configured such that the phase at which the relay is opened is determined by the voltage synchronization signal and the opening/closing signal, and the phase at which the relay is opened is determined by the current synchronization signal and the opening/closing signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21023583A JPS60101828A (en) | 1983-11-08 | 1983-11-08 | Relay drive unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21023583A JPS60101828A (en) | 1983-11-08 | 1983-11-08 | Relay drive unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60101828A JPS60101828A (en) | 1985-06-05 |
| JPH0345846B2 true JPH0345846B2 (en) | 1991-07-12 |
Family
ID=16586020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21023583A Granted JPS60101828A (en) | 1983-11-08 | 1983-11-08 | Relay drive unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60101828A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS617521A (en) * | 1984-06-20 | 1986-01-14 | 松下電器産業株式会社 | Relay drive device |
| JPS6286620A (en) * | 1985-10-11 | 1987-04-21 | 日新電機株式会社 | Switch |
| JPH0212716A (en) * | 1988-06-30 | 1990-01-17 | Mitsubishi Electric Corp | Zero cross starting signal generation device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5564325A (en) * | 1978-11-09 | 1980-05-15 | Honda Motor Co Ltd | Device for protecting ac power switch |
| JPS59132233A (en) * | 1983-01-19 | 1984-07-30 | Matsushita Electric Ind Co Ltd | Relay driving circuit |
-
1983
- 1983-11-08 JP JP21023583A patent/JPS60101828A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5564325A (en) * | 1978-11-09 | 1980-05-15 | Honda Motor Co Ltd | Device for protecting ac power switch |
| JPS59132233A (en) * | 1983-01-19 | 1984-07-30 | Matsushita Electric Ind Co Ltd | Relay driving circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60101828A (en) | 1985-06-05 |
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