JP2819599B2 - DC motor disconnection detection circuit - Google Patents
DC motor disconnection detection circuitInfo
- Publication number
- JP2819599B2 JP2819599B2 JP1083486A JP8348689A JP2819599B2 JP 2819599 B2 JP2819599 B2 JP 2819599B2 JP 1083486 A JP1083486 A JP 1083486A JP 8348689 A JP8348689 A JP 8348689A JP 2819599 B2 JP2819599 B2 JP 2819599B2
- Authority
- JP
- Japan
- Prior art keywords
- motor
- circuit
- disconnection detection
- detection circuit
- switch element
- 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 - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
- F25D2317/04—Treating air flowing to refrigeration compartments
- F25D2317/041—Treating air flowing to refrigeration compartments by purification
- F25D2317/0415—Treating air flowing to refrigeration compartments by purification by deodorizing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
- F25D2317/04—Treating air flowing to refrigeration compartments
- F25D2317/041—Treating air flowing to refrigeration compartments by purification
- F25D2317/0416—Treating air flowing to refrigeration compartments by purification using an ozone generator
Landscapes
- Protection Of Generators And Motors (AREA)
- Control Of Direct Current Motors (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、スイッチ素子例えばトランジスタでオン・
オフ制御される直流モータの断線検出回路に関するもの
で、特に、低電圧で駆動される直流モータの断線検出に
対して適用される。DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATION The present invention relates to a switch element, for example, a transistor.
The present invention relates to a disconnection detection circuit for a DC motor that is controlled to be off, and is particularly applied to disconnection detection of a DC motor driven at a low voltage.
従来の技術 直流モータの寿命は、カーボンブラシュの構造及び回
転方向により、断線状態で停止するものと短絡状態で停
止するものがある。前者の場合、モータに直列抵抗を挿
入してその電圧降下を監視する方法がよく知られてい
る。2. Description of the Related Art Depending on the structure and rotation direction of a carbon brush, there are two types of DC motors, one that stops in a disconnected state and the other that stops in a short-circuit state. In the former case, a method of inserting a series resistor into a motor and monitoring the voltage drop is well known.
発明が解決しようとする課題 しかしながら、前記の直列抵抗を挿入する方法は駆動
電圧が低い場合、その電圧降下による効率の低下や、電
圧降下分を低減する為に、増幅器を必要とする等の問題
点があった。Problems to be Solved by the Invention However, the above-described method of inserting a series resistor has a problem that when a driving voltage is low, an efficiency is reduced due to the voltage drop, and an amplifier is required to reduce a voltage drop. There was a point.
本発明は上記問題点に鑑み、直流モータに直列抵抗を
挿入することなく、直流モータの断線検出回路を提供す
るものである。The present invention has been made in view of the above problems, and provides a disconnection detection circuit for a DC motor without inserting a series resistor into the DC motor.
課題を解決するための手段 この目的を達成する為に、本発明の直流モータの断線
検出回路は、スイッチ素子にてオン・オフ制御を行うモ
ータにおいて、前記スイッチ素子がオフ期間に、前記直
流モータに微小電流を供給する手段と、前記スイッチ素
子がオフした瞬間から遅延時間を発生する遅延回路と、
前記直流モータの端子電圧を検出する回路とにより構成
されている。Means for Solving the Problems In order to achieve this object, a disconnection detection circuit for a DC motor according to the present invention is a motor for performing on / off control by a switch element. A delay circuit that generates a delay time from the moment the switch element is turned off,
And a circuit for detecting a terminal voltage of the DC motor.
作用 上記構成により、直流モータに直列抵抗を挿入するこ
となく直流モータの断線検出が可能となる。Operation With the above configuration, disconnection of the DC motor can be detected without inserting a series resistor in the DC motor.
実施例 以下本発明の実施例について、図面を参照しながら説
明する。Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
第１図は本発明の直流モータの断線検出回路の構成回
路図である。第１図において、１は直流モータのオン・
オフ制御を行うスイッチ素子、２は直流モータ、３は直
流モータに微小電流を供給する抵抗、４はダイオード、
５は遅延回路を構成するコンデンサー、６はモータの端
子電圧を検出する論理判定回路、７は電池、８はスイッ
チ素子１の制御信号入力端子、９は論理判定信号出力端
子である。以上の様に構成された直流モータの断線検出
回路についてその動作を説明する。FIG. 1 is a configuration circuit diagram of a disconnection detection circuit of a DC motor according to the present invention. In FIG. 1, reference numeral 1 denotes the on / off state of the DC motor.
Switch element for performing off control, 2 is a DC motor, 3 is a resistor for supplying a small current to the DC motor, 4 is a diode,
Reference numeral 5 denotes a capacitor constituting a delay circuit, 6 denotes a logic determination circuit for detecting a terminal voltage of the motor, 7 denotes a battery, 8 denotes a control signal input terminal of the switch element 1, and 9 denotes a logic determination signal output terminal. The operation of the disconnection detection circuit of the DC motor configured as described above will be described.
まず、制御信号入力端子８に“Lo"信号を入力する
と、スイッチ素子１はオン状態となり、直流モータ２に
電源が供給され駆動する。この場合、制御信号入力端子
８は“Lo"レベルであり、直流モータ２の側電圧もダ
イオード４によりブロックされる為、コンデンサ５の電
圧は“Lo"レベルとなる。従って論理判定回路６は、論
理判定出力信号端子９に“Hi"信号（異常なし）を出力
する。First, when a “Lo” signal is input to the control signal input terminal 8, the switch element 1 is turned on, and power is supplied to the DC motor 2 to drive it. In this case, the control signal input terminal 8 is at the "Lo" level, and the side voltage of the DC motor 2 is also blocked by the diode 4, so that the voltage of the capacitor 5 is at the "Lo" level. Therefore, the logic judgment circuit 6 outputs a “Hi” signal (no abnormality) to the logic judgment output signal terminal 9.
次に、制御信号入力端子８に“Hi"信号を入力する
と、スイッチ素子１はオフとなる。直流モータ２は、ス
イッチ素子１がオフした直後は慣性により回転し、この
期間直流モータ２は直流発電機としてその端子間に直流
電圧を発生する。従って、この期間は、制御信号入力端
子８から、抵抗３を介してコンデンサ５を充電しコンデ
ンサ５の端子電圧は、抵抗３とコンデンサ５によって決
定される時定数により上昇する。やがて、直流モータ２
が停止するとその端子電圧は直流モータ２の巻線抵抗が
低いためほぼ0Vとなり、コンデンサ５の電圧はダイオー
ド４の順方向電圧にてクランプされる。Next, when a "Hi" signal is input to the control signal input terminal 8, the switch element 1 is turned off. The DC motor 2 rotates by inertia immediately after the switch element 1 is turned off. During this period, the DC motor 2 generates a DC voltage between its terminals as a DC generator. Therefore, during this period, the capacitor 5 is charged from the control signal input terminal 8 via the resistor 3, and the terminal voltage of the capacitor 5 increases according to the time constant determined by the resistor 3 and the capacitor 5. Eventually, DC motor 2
Is stopped, the terminal voltage becomes almost 0 V because the winding resistance of the DC motor 2 is low, and the voltage of the capacitor 5 is clamped by the forward voltage of the diode 4.
前述の遅延回路による論理判定回路６の入力信号の立
上がりの遅れが、モータ２の惰性による回転停止に要す
る時間以上に設定されておれば、論理判定回路６への入
力はないこととなり、論理判定回路６の出力端子９は
“Hi"信号の状態を保持する。If the delay of the rise of the input signal of the logic judgment circuit 6 by the above-described delay circuit is set to be equal to or longer than the time required for stopping the rotation of the motor 2 due to inertia, there is no input to the logic judgment circuit 6 and the logic judgment is made. The output terminal 9 of the circuit 6 holds the state of the "Hi" signal.
一方、モータ２が断線しているケースでは、抵抗３を
通して供給される微小電流が、ダイオード４を介してモ
ータ２は吸収されることがなく、論理判定回路６の入力
は立上ってしまい、論理判定回路６は、出力端子９に
“Lo"信号を出力する。On the other hand, in the case where the motor 2 is disconnected, the minute current supplied through the resistor 3 is not absorbed by the motor 2 via the diode 4, and the input of the logic decision circuit 6 rises. The logic determination circuit 6 outputs a “Lo” signal to the output terminal 9.
以上の説明から明らかなように直流モータ２が断線し
ていない時はモータ制御信号が“Lo"の時（即ちモータ
がONの時）はもちろん“Lo"から“Hi"に変化（即ちモー
タ２がONからOFFに変化）しても、論理判定回路６は出
力“Hi"のままである。一方直流モータ２が断線してい
る場合は、モータ制御信号が“Lo"（即ちモータON）の
時は論理判定回路６の出力信号は“Hi"であるが、モー
タ制御信号が“Lo"から“Hi"に変化（モータ２がONから
OFFへ変化）した時、遅延回路で構成される遅延時間を
経過して、後、出力信号“Lo"が出力されることにな
る。なお論理判定回路６はCMOSICなどの論理素子を用い
て構成することも可能である。As is apparent from the above description, when the DC motor 2 is not disconnected, the motor control signal changes from "Lo" to "Hi" (i.e., when the motor is ON) (i.e., when the motor is ON). Is changed from ON to OFF), the logic determination circuit 6 keeps the output “Hi”. On the other hand, when the DC motor 2 is disconnected, the output signal of the logic judgment circuit 6 is "Hi" when the motor control signal is "Lo" (that is, the motor is ON), but the motor control signal is changed from "Lo". Changes to “Hi” (from motor 2 ON)
When it changes to OFF), the output signal “Lo” is output after the elapse of the delay time configured by the delay circuit. Note that the logic determination circuit 6 can also be configured using a logic element such as a CMOS IC.
発明の効果 このように本発明の直流モータの断線検出回路は、モ
ータに直流抵抗を挿入することがないので、特に電源電
圧が低い場合に極めて実用的である。As described above, the disconnection detection circuit for a DC motor according to the present invention does not need to insert a DC resistance into the motor, and is therefore extremely practical especially when the power supply voltage is low.
第１図は本発明による実施例の構成を示す図である。 １……スイッチ素子、２……直流モータ、３……抵抗、
４……ダイオード、５……コンデンサ、６……論理判定
回路、７……電池、８……モータ制御信号入力端子、９
……出力端子。FIG. 1 is a diagram showing the configuration of an embodiment according to the present invention. 1 ... switch element, 2 ... DC motor, 3 ... resistance,
4 ... Diode, 5 ... Capacitor, 6 ... Logic judgment circuit, 7 ... Battery, 8 ... Motor control signal input terminal, 9
…… Output terminal.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) H02P 7/00,7/34 H02P 5/00 - 5/405 H02H 7/08──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 6 , DB name) H02P 7/00, 7/34 H02P 5/00-5/405 H02H 7/08
Claims (1)
流モータであって、前記スイッチ素子がオフ期間に、前
記直流モータに微少電流を供給する手段と、前記スイッ
チ素子がオフした瞬間から遅延時間を発生する遅延回路
と、前記直流モータの端子電圧を検出する論理判定回路
とにより構成された直流モータの断線検出回路。1. A DC motor for performing on / off control by a switch element, a means for supplying a small current to the DC motor during an OFF period of the switch element, and a delay from a moment when the switch element is turned OFF. A disconnection detection circuit for a DC motor, comprising a delay circuit for generating time and a logic determination circuit for detecting a terminal voltage of the DC motor.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1083486A JP2819599B2 (en) | 1989-03-31 | 1989-03-31 | DC motor disconnection detection circuit |
| DE69008601T DE69008601T2 (en) | 1989-03-31 | 1990-03-29 | Device for deodorization with ozone. |
| EP90106052A EP0390159B1 (en) | 1989-03-31 | 1990-03-29 | Ozone deodorizing device |
| KR1019900004313A KR930005674B1 (en) | 1989-03-31 | 1990-03-30 | Ozone deodorizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1083486A JP2819599B2 (en) | 1989-03-31 | 1989-03-31 | DC motor disconnection detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02262897A JPH02262897A (en) | 1990-10-25 |
| JP2819599B2 true JP2819599B2 (en) | 1998-10-30 |
Family
ID=13803808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1083486A Expired - Fee Related JP2819599B2 (en) | 1989-03-31 | 1989-03-31 | DC motor disconnection detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2819599B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19732095A1 (en) * | 1997-07-25 | 1999-01-28 | Bosch Gmbh Robert | Circuit arrangement for controlling a motor with an overload detection device |
-
1989
- 1989-03-31 JP JP1083486A patent/JP2819599B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02262897A (en) | 1990-10-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |