JP2005249502A

JP2005249502A - Abnormality monitoring device for motor power-on switch

Info

Publication number: JP2005249502A
Application number: JP2004058304A
Authority: JP
Inventors: Shogo Yokoyama; 正吾横山
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2004-03-03
Filing date: 2004-03-03
Publication date: 2005-09-15

Abstract

<P>PROBLEM TO BE SOLVED: To provide an abnormality monitoring device for motor power-on switch having a digital control element capable of properly monitoring the abnormality even in the case of open mode malfunction of the power-on switch. <P>SOLUTION: The abnormality monitoring device is provided with the power-on switch 2 for controlling the power-on of a DC motor 3; a controller 1 for impressing an indication signal to the power-on switch 2; an input signal monitoring relay 4 responding to the indication signal; an output signal monitoring relay 5 responding to the action of a DC motor 3; and an abnormality monitoring relay circuit 6 for monitoring the abnormality by comparing the actions of the input signal monitoring relay 4 and the output signal monitoring relay 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

この発明は、電動機用電源投入開閉器の異常監視装置、特に、発電所におけるタービンのガバナを駆動する直流電動機の電源投入開閉器の異常監視装置に関するものである。 The present invention relates to an abnormality monitoring device for a power-on switch for a motor, and more particularly to an abnormality monitoring device for a power-on switch for a DC motor that drives a governor of a turbine in a power plant.

従来の直流電動機の電源投入開閉器の異常監視装置においては、指令信号のＯＮ時間は一定であり、電源投入開閉器の出力をパルス幅検出器もしくはタイマリレーによって、電源投入開閉器の短絡故障モードにおける常時ＯＮ状態のみを異常監視している（例えば、特許文献１参照）。 In a conventional DC motor power-on switch abnormality monitoring device, the ON time of the command signal is constant, and the output of the power-on switch is short-circuit fault mode of the power-on switch by a pulse width detector or timer relay. Only the always-on state is monitored for abnormality (see, for example, Patent Document 1).

特開２０００−９７８０号公報JP 2000-9780 A

従来の直流電動機の電源投入開閉器の異常監視装置では、電源投入開閉器の出力パルスのＯＮ時間長さをタイマーで測定し、その長さが設定した値より長くなったときに異常検出していた。このため、断線等開放モードの故障時には異常監視ができていなかった。また、出力パルスのＯＮ時間長さを設定した値より長くすることができないなどの問題点があった。 In a conventional DC motor power-on switch abnormality monitoring device, the output pulse ON time length of the power-on switch is measured with a timer and an abnormality is detected when the length becomes longer than the set value. It was. For this reason, abnormal monitoring could not be performed at the time of failure in open mode such as disconnection. There is also a problem that the ON time length of the output pulse cannot be made longer than the set value.

この発明は、上記のような課題を解決するためになされたものであり、電源投入開閉器が開放モード故障時でも異常監視を適切に行なえる電動機用電源投入開閉器の異常監視装置を得ることを目的とする。 The present invention has been made to solve the above-described problems, and provides an abnormality monitoring device for a power-on switch for a motor that can properly perform abnormality monitoring even when the power-on switch is in an open mode failure. With the goal.

この発明に係る電動機用電源投入開閉器の異常監視装置では、電動機の電源投入を制御する電源投入開閉器に指令信号を印加する制御装置、前記指令信号に応動する第１のリレー要素、前記電動機の作動に応動する第２のリレー要素を備え、前記第１のリレー要素と前記第２のリレー要素との動作を比較して異常監視を行う異常監視手段を設けたものである。 In the abnormality monitoring device for a power-on switch for a motor according to the present invention, a control device for applying a command signal to a power-on switch for controlling power-on of the motor, a first relay element responsive to the command signal, the motor A second relay element that responds to the operation of the first relay element, and provided with an abnormality monitoring means that performs an abnormality monitoring by comparing the operations of the first relay element and the second relay element.

この発明によれば、電源投入開閉器が開放モード故障時でも異常監視を適切に行なえる電動機用電源投入開閉器の異常監視装置を得ることができる。 According to the present invention, it is possible to obtain an abnormality monitoring device for a motor power-on switch that can appropriately monitor abnormality even when the power-on switch is in an open mode failure.

実施の形態１．
この発明による実施の形態１を図１に基づいて説明する。図１は実施の形態１における構成を示す回路接続図である。 Embodiment 1 FIG.
A first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a circuit connection diagram showing a configuration in the first embodiment.

図１において、制御装置１からは、電源投入開閉器２にパルスの信号指令が出力される。このパルス指令信号によって電源投入開閉器２は電源を入り切りすることで直流電動機３を駆動させる。
電源投入開閉器２の入力信号が印加されるパルス指令信号回路に入力信号監視リレー４を接続し、電源投入開閉器２の投入によって電源投入開閉器２の出力信号により付勢される直流電動機３の駆動回路に出力信号監視リレー５を接続する。これらの入力信号監視リレー４と出力信号監視リレー５とから異常監視のリレー回路６が構成される。 In FIG. 1, the control device 1 outputs a pulse signal command to the power-on switch 2. By this pulse command signal, the power-on switch 2 drives the DC motor 3 by turning on and off the power.
An input signal monitoring relay 4 is connected to a pulse command signal circuit to which an input signal of the power-on switch 2 is applied, and the DC motor 3 is energized by the output signal of the power-on switch 2 when the power-on switch 2 is turned on. The output signal monitoring relay 5 is connected to the driving circuit. These input signal monitoring relay 4 and output signal monitoring relay 5 constitute an abnormality monitoring relay circuit 6.

次に、動作について説明する。
図１において、電源投入開閉器２の入力信号を監視する入力信号監視リレー４と電源投入開閉器２の出力信号を監視する出力監視リレー５とを比較し、どちらも同じ動きであれば正常であると判断し、片方のリレーがＯＮに対し、もう他方のリレーがＯＦＦであれば異常であると判断するリレー回路を構成している。
これにより、電源投入開閉器２の開放モード故障でも異常を監視することができる。また、パルス出力ＯＮ時間を長くしても問題がなくなる。 Next, the operation will be described.
In FIG. 1, an input signal monitoring relay 4 that monitors the input signal of the power-on switch 2 and an output monitoring relay 5 that monitors the output signal of the power-on switch 2 are compared. A relay circuit is configured to determine that there is an abnormality and to determine that there is an abnormality if one of the relays is ON and the other relay is OFF.
Thereby, it is possible to monitor the abnormality even in the open mode failure of the power-on switch 2. Further, there is no problem even if the pulse output ON time is lengthened.

この発明による実施の形態１によれば、電動機３の電源投入を制御する電源投入開閉器２、前記電源投入開閉器２に指令信号を印加する制御装置１、前記制御装置１からの指令信号に応動する入力信号監視リレー４からなる第１のリレー要素、前記電動機３の付勢に応動する出力信号監視リレー５からなる第２のリレー要素を備え、前記入力信号監視リレー４からなる第１のリレー要素と前記出力信号監視リレー５からなる第２のリレー要素との動作を比較して異常監視を行う異常監視リレー回路６からなる異常監視手段を設けたので、入力信号監視リレーからなる第１のリレー要素と出力信号監視リレーからなる第２のリレー要素との動作を比較して異常監視を行うことにより、電源投入開閉器が開放モード故障時でも異常監視を適切に行なえる電動機用電源投入開閉器の異常監視装置を得ることができる。 According to the first embodiment of the present invention, a power-on switch 2 that controls power-on of the electric motor 3, a control device 1 that applies a command signal to the power-on switch 2, and a command signal from the control device 1 A first relay element composed of a responsive input signal monitoring relay 4 and a second relay element composed of an output signal monitoring relay 5 responsive to energization of the electric motor 3, and a first relay element composed of the input signal monitoring relay 4. Since the abnormality monitoring means comprising the abnormality monitoring relay circuit 6 for performing abnormality monitoring by comparing the operations of the relay element and the second relay element comprising the output signal monitoring relay 5 is provided, the first comprising the input signal monitoring relay. By monitoring the operation of the second relay element consisting of the output signal monitoring relay and the second relay element, abnormality monitoring is performed properly even when the power-on switch is in open mode failure. It is possible to obtain an abnormality monitoring device for obtaining an electric motor for power-on switch.

実施の形態２．
この発明による実施の形態２を図２に基づいて説明する。図２は実施の形態２における構成を示す回路接続図である。
この実施の形態２において、ここで説明する特有の構成以外の構成については、先に説明した実施の形態１における構成と同一の構成内容を具備し、同様の作用を奏するものである。図中、同一符号は同一または相当部分を示す。 Embodiment 2. FIG.
A second embodiment according to the present invention will be described with reference to FIG. FIG. 2 is a circuit connection diagram showing a configuration in the second embodiment.
In the second embodiment, the configuration other than the specific configuration described here has the same configuration contents as the configuration in the first embodiment described above, and exhibits the same operation. In the drawings, the same reference numerals indicate the same or corresponding parts.

上記実施の形態１では、電源投入開閉器２の入力信号であるパルス指令信号回路に入力信号監視リレー４を接続し、電源投入開閉器２の出力信号である直流電動機３の駆動回路に出力信号監視リレー５を接続し、入力信号監視リレー４と出力信号監視リレー５とからなる異常監視リレー回路６を構成していたが、実施の形態２では、この部分を図２に示す電子回路に置き換えて比較し異常監視を行なうことができ、リレーの機械的駆動品がなくなるために、メインテナンス性が向上する。 In the first embodiment, the input signal monitoring relay 4 is connected to the pulse command signal circuit that is the input signal of the power-on switch 2, and the output signal is output to the drive circuit of the DC motor 3 that is the output signal of the power-on switch 2. The monitoring relay 5 is connected and the abnormality monitoring relay circuit 6 including the input signal monitoring relay 4 and the output signal monitoring relay 5 is configured. In the second embodiment, this portion is replaced with the electronic circuit shown in FIG. Therefore, the abnormality monitoring can be performed and the mechanical drive product of the relay is eliminated, so that the maintenance property is improved.

図２では、電子回路を用いた異常監視回路６１に、入力信号監視トランジスタＴ１と出力信号監視トランジスタＴ２とを設け、これらの入力信号監視トランジスタＴ１および出力信号監視トランジスタＴ２の出力を、Ｅｘ．ＮＯＲ（Ｅｘｃｌｕｓｉｖｅ＿ＮＯＲ：イクスクルーシブＮＯＲ）ゲート回路からなる論理回路ＬＧに印加するように構成されている。このＥｘ．ＮＯＲゲート回路からなる論理回路ＬＧは「排他的論理和の反転」という論理構成を持つものである。 In FIG. 2, an abnormality monitoring circuit 61 using an electronic circuit is provided with an input signal monitoring transistor T1 and an output signal monitoring transistor T2, and the outputs of these input signal monitoring transistor T1 and output signal monitoring transistor T2 are connected to Ex. It is configured to be applied to a logic circuit LG composed of a NOR (Exclusive_NOR: exclusive NOR) gate circuit. This Ex. The logic circuit LG composed of a NOR gate circuit has a logic configuration of “inversion of exclusive OR”.

図２において、制御装置１からパルス指令信号が電源投入開閉器２の操作リレーＲ１に印加され電源投入開閉器２が投入されるべき状態にあるときは、入力信号監視トランジスタＴ１は出力値「１」を出力する。
電源投入開閉器２が投入され電動機３が駆動用電源により付勢されている状態にあるときは、出力信号監視トランジスタＴ２は出力値「１」を出力する。
このように、電源投入開閉器２が正常状態であるときは、異常監視回路６１のＥｘ．ＮＯＲゲート回路からなる論理回路ＬＧの入力端子Ａ，Ｂには、入力Ａ「１」および入力Ｂ「１」が印加され、論理回路ＬＧの出力端子Ｙには出力Ｙ「１」が導出される。この出力Ｙ「１」によって異常監視回路６１の異常監視リレーＲ２は付勢されて、その出力接点を閉合し、異常が発生していないことを表示する。 In FIG. 2, when the pulse command signal is applied from the control device 1 to the operation relay R1 of the power-on switch 2 and the power-on switch 2 is to be turned on, the input signal monitoring transistor T1 has an output value “1”. Is output.
When the power switch 2 is turned on and the electric motor 3 is energized by the driving power supply, the output signal monitoring transistor T2 outputs the output value “1”.
Thus, when the power-on switch 2 is in a normal state, the Ex. An input A “1” and an input B “1” are applied to the input terminals A and B of the logic circuit LG formed of a NOR gate circuit, and an output Y “1” is derived from the output terminal Y of the logic circuit LG. . By this output Y “1”, the abnormality monitoring relay R2 of the abnormality monitoring circuit 61 is energized to close the output contact and display that no abnormality has occurred.

これに対し、制御装置１からパルス指令信号が電源投入開閉器２の操作リレーＲ１に印加され、入力信号監視トランジスタＴ１が出力値「１」を出力しているにも拘らず、出力信号監視トランジスタＴ２の出力として出力値「０」が示されているときは、電源投入開閉器２に異常状態が発生していることを示している。論理回路ＬＧの入力端子Ａ，Ｂには、入力Ａ「１」および入力Ｂ「０」が印加され、論理回路ＬＧの出力端子Ｙには出力Ｙ「０」が導出される。この出力Ｙ「０」によって異常監視回路６１の異常監視リレーＲ２は消勢されて、その出力接点を開放して、異常の発生を表示する。
そして、入力信号監視トランジスタＴ１が出力値「０」を示し、出力信号監視トランジスタＴ２が出力値「１」を出力しているときも、論理回路ＬＧの出力端子Ｙには出力Ｙ「０」が導出される。この出力Ｙ「０」によって異常監視回路６１の異常監視リレーＲ２は消勢されて、その出力接点を開放して、異常の発生を表示する。 On the other hand, a pulse command signal is applied from the control device 1 to the operation relay R1 of the power-on switch 2, and the output signal monitoring transistor is output even though the input signal monitoring transistor T1 outputs the output value “1”. When the output value “0” is indicated as the output of T2, it indicates that an abnormal state has occurred in the power-on switch 2. An input A “1” and an input B “0” are applied to the input terminals A and B of the logic circuit LG, and an output Y “0” is derived to the output terminal Y of the logic circuit LG. By this output Y “0”, the abnormality monitoring relay R2 of the abnormality monitoring circuit 61 is de-energized, and its output contact is opened to indicate the occurrence of abnormality.
Even when the input signal monitoring transistor T1 indicates the output value “0” and the output signal monitoring transistor T2 outputs the output value “1”, the output Y “0” is output to the output terminal Y of the logic circuit LG. Derived. By this output Y “0”, the abnormality monitoring relay R2 of the abnormality monitoring circuit 61 is de-energized, and its output contact is opened to indicate the occurrence of abnormality.

この発明による実施の形態２によれば、電動機の電源投入を制御する電源投入開閉器２、前記電源投入開閉器２に指令信号を印加する制御装置１、前記制御装置１による指令信号に応動する入力信号監視トランジスタＴ１で構成された電子回路要素からなる第１のリレー要素、前記電動機３の付勢に応動する出力信号監視トランジスタＴ２で構成された電子回路要素からなる第２のリレー要素を備え、前記入力信号監視トランジスタＴ１で構成された電子回路要素からなる第１のリレー要素と前記出力信号監視トランジスタＴ２で構成された電子回路要素からなる第２のリレー要素との出力信号を比較して異常監視を行う「排他的論理和の反転」という論理構成を示すＥｘ．ＮＯＲゲート回路からなる論理回路ＬＧを有する電子回路を用いた異常監視回路６１からなる異常監視手段を設けたので、電子回路要素からなる第１のリレー要素と電子回路要素からなる第２のリレー要素との出力信号を比較する論理回路で異常監視を行うことにより、電源投入開閉器が開放モード故障時でも異常監視を適切に行なえる電子回路で構成された電動機用電源投入開閉器の異常監視装置を得ることができる。 According to the second embodiment of the present invention, the power-on switch 2 that controls the power-on of the electric motor, the control device 1 that applies a command signal to the power-on switch 2, and the command signal from the control device 1 are responsive. A first relay element composed of an electronic circuit element composed of an input signal monitoring transistor T1, and a second relay element composed of an electronic circuit element composed of an output signal monitoring transistor T2 responsive to energization of the electric motor 3. The output signals of the first relay element composed of the electronic circuit element composed of the input signal monitoring transistor T1 and the second relay element composed of the electronic circuit element composed of the output signal monitoring transistor T2 are compared. Ex. Showing a logical configuration of “inversion of exclusive OR” for performing abnormality monitoring. Since the abnormality monitoring means including the abnormality monitoring circuit 61 using the electronic circuit having the logic circuit LG including the NOR gate circuit is provided, the first relay element including the electronic circuit element and the second relay element including the electronic circuit element An abnormality monitoring device for a power-on switch for an electric motor composed of an electronic circuit that can properly monitor the abnormality even when the power-on switch is in an open mode failure by monitoring the abnormality with a logic circuit that compares the output signal with Can be obtained.

実施の形態３．
この発明による実施の形態３を図３に基づいて説明する。図３は実施の形態３における構成を示す回路接続図である。
この実施の形態３において、ここで説明する特有の構成以外の構成については、先に説明した実施の形態１および実施の形態２における構成と同一の構成内容を具備し、同様の作用を奏するものである。図中、同一符号は同一または相当部分を示す。 Embodiment 3 FIG.
A third embodiment of the present invention will be described with reference to FIG. FIG. 3 is a circuit connection diagram showing the configuration of the third embodiment.
In the third embodiment, the configuration other than the specific configuration described here has the same configuration contents as the configurations in the first and second embodiments described above and exhibits the same operation. It is. In the drawings, the same reference numerals indicate the same or corresponding parts.

図３において、制御装置１はシーケンサもしくはプログラマブルコントローラとしてのディジタルコントローラで構成されるデジタル制御要素を有する制御装置によって構成されている。
制御装置１から電源投入開閉器１へ印加される電動機３の電源投入のためのパルス指令信号と、電源投入開閉器２の出力信号である直流電動機３の駆動回路からの出力信号とは、制御装置１におけるデジタル制御要素によって、実施の形態１および実施の形態２における論理構成と同様に、比較演算され、電源投入開閉器２の異常状態発生に応じて制御装置１から異常監視出力を導出する。 In FIG. 3, the control device 1 is constituted by a control device having a digital control element constituted by a sequencer or a digital controller as a programmable controller.
A pulse command signal for turning on the electric motor 3 applied to the power-on switch 1 from the control device 1 and an output signal from the drive circuit of the DC motor 3 which is an output signal of the power-on switch 2 are controlled. Similar to the logical configuration in the first and second embodiments, the digital control element in the device 1 performs a comparison operation and derives an abnormality monitoring output from the control device 1 in response to the occurrence of an abnormal state of the power-on switch 2. .

この実施の形態３では、シーケンサもしくはディジタルコントローラ等の制御装置１へ、電源投入開閉器の出力を入力し、内部の演算にて比較し異常監視を行うことで、異常監視の構成品をなくすことができ、経済的に優れた装置を得ることができる。 In the third embodiment, the output of the power-on switch is input to the control device 1 such as a sequencer or a digital controller, and the abnormality monitoring is performed by comparing with the internal calculation and monitoring the abnormality. And an economically superior device can be obtained.

この発明による実施の形態３によれば、電動機３の電源投入を制御する電源投入開閉器２、前記電源投入開閉器２に指令信号を印加するシーケンサもしくはプログラマブルコントローラとしてのディジタルコントローラで構成されるデジタル制御要素を有する制御装置１、前記制御装置１のデジタル制御要素により構成され前記指令信号に応動する第１のリレー要素、前記制御装置１のデジタル制御要素により構成され前記電動機３の付勢に応動する第２のリレー要素を備え、前記制御装置１のデジタル制御要素により構成される前記第１のリレー要素と前記制御装置１のデジタル制御要素により構成される前記第２のリレー要素との動作を前記ディジタルコントローラで構成される制御装置１のデジタル制御要素により比較して異常監視を行う異常監視手段を設けたので、電源投入開閉器が開放モード故障時でも異常監視を適切に行なえるデジタル制御要素を有する制御装置で構成された電動機用電源投入開閉器の異常監視装置を得ることができる。 According to the third embodiment of the present invention, a digital power source comprising a power-on switch 2 for controlling the power-on of the electric motor 3, a sequencer for applying a command signal to the power-on switch 2, or a digital controller as a programmable controller. A control device 1 having a control element, a first relay element configured by a digital control element of the control device 1 and responding to the command signal, and configured by a digital control element of the control device 1 and responding to energization of the motor 3 And the second relay element configured by the digital control element of the control device 1 and the second relay element configured by the digital control element of the control device 1. Comparing with the digital control element of the control device 1 constituted by the digital controller, abnormality monitoring is performed. Therefore, there is provided an abnormality monitoring device for a power-on switch for an electric motor composed of a control device having a digital control element capable of appropriately monitoring the abnormality even when the power-on switch is in an open mode failure. Can do.

この発明による実施の形態１における構成を示す回路接続図である。1 is a circuit connection diagram showing a configuration according to a first embodiment of the present invention. この発明による実施の形態２における構成を示す回路接続図である。It is a circuit connection diagram which shows the structure in Embodiment 2 by this invention. この発明による実施の形態３における構成を示す回路接続図である。It is a circuit connection diagram which shows the structure in Embodiment 3 by this invention.

Explanation of symbols

１制御装置、２電源投入開閉器、３直流電動機、４入力信号監視リレー、５出力信号監視リレー５、６異常監視リレー回路、６１電子回路を用いた異常監視リレー回路。
DESCRIPTION OF SYMBOLS 1 Control apparatus, 2 Power-on switch, 3 DC motor, 4 Input signal monitoring relay, 5 Output signal monitoring relay 5, 6 Abnormality monitoring relay circuit, 61 Abnormality monitoring relay circuit using an electronic circuit.

Claims

A power-on switch for controlling power-on of the electric motor, a control device for applying a command signal to the power-on switch, a first relay element responsive to the command signal, and a second relay responsive to the energization of the motor An abnormality monitoring device for a power-on switch for an electric motor, comprising an element, and provided with an abnormality monitoring means for performing an abnormality monitoring by comparing operations of the first relay element and the second relay element.

A power-on switch for controlling power-on of the motor, a control device for applying a command signal to the power-on switch, a first relay element comprising an input signal monitoring relay responsive to the command signal, for energizing the motor A second relay element comprising a responding output signal monitoring relay is provided, and an abnormality is monitored by comparing the operations of the first relay element comprising the input signal monitoring relay and the second relay element comprising the output signal monitoring relay. An abnormality monitoring device for a power-on switch for a motor, characterized in that an abnormality monitoring means comprising an abnormality monitoring relay circuit is provided.

A power-on switch for controlling power-on of the electric motor; a control device for applying a command signal to the power-on switch; a first relay element comprising an electronic circuit element responsive to the command signal; responsive to energization of the motor A second relay element comprising an electronic circuit element that performs an abnormality monitoring by comparing output signals of the first relay element comprising the electronic circuit element and the second relay element comprising the electronic circuit element An abnormality monitoring device for a power-on switch for an electric motor, characterized in that an abnormality monitoring means having a circuit is provided.

A power-on switch for controlling power-on of the electric motor, a control device comprising a digital controller having a digital control element for applying a command signal to the power-on switch, and the command signal comprising the digital control element of the control device A first relay element that is responsive to the first control element, a second relay element that is configured by a digital control element of the control device and that is responsive to energization of the motor, and is configured by the digital control element of the control device. An abnormality monitoring means is provided for performing an abnormality monitoring by comparing the operation of the relay element and the second relay element constituted by the digital control element of the control device with the digital control element of the control device constituted by the digital controller. An abnormality monitoring device for a power-on switch for an electric motor, characterized in that