JPH0446584A - Control method for fan motor - Google Patents

Control method for fan motor

Info

Publication number
JPH0446584A
JPH0446584A JP2154855A JP15485590A JPH0446584A JP H0446584 A JPH0446584 A JP H0446584A JP 2154855 A JP2154855 A JP 2154855A JP 15485590 A JP15485590 A JP 15485590A JP H0446584 A JPH0446584 A JP H0446584A
Authority
JP
Japan
Prior art keywords
relay
power supply
fan motor
control relay
microcomputer
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
Application number
JP2154855A
Other languages
Japanese (ja)
Inventor
Masatoshi Takahashi
高橋　雅利
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu General Ltd
Original Assignee
Fujitsu General Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu General Ltd filed Critical Fujitsu General Ltd
Priority to JP2154855A priority Critical patent/JPH0446584A/en
Publication of JPH0446584A publication Critical patent/JPH0446584A/en
Pending legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Landscapes

  • Air Conditioning Control Device (AREA)
  • Control Of Electric Motors In General (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE:To suppress induction of electromotive force as low as possible by temporarily interrupting a control relay in synchronism with an interruption signal and switching relay contacts when power supply to a fan motor, is temporarily interrupted. CONSTITUTION:A control relay 3. to which DC voltage 12V supply is interrupted, is turned OFF through zero-cross function at a zero-cross point of source voltage waveform. i.e., a time point when an interruption signal makes a transition from H to L. Upon provision of a second interruption signal after turn OFF of the control relay 3. a microcomputer 4 switches the input levels from H to L for one or a plurality of inverters out of three inverters 8. 9, 10, required for switching the rotational sped of a fan motor 2, thereby interrupting DC voltage 12V supply to corresponding relay coils thus switching the corresponding relay contacts. Upon switching of relay contacts, input level of an inverter 7 is returned from L to H based on a next interruption signal so that the control relay 3 is fed with DC voltage 12V and reset thus feeding the fan nectar 2 with power from a commercial power supply 1.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は空気調和機に係わり、さらに詳しくは、回転速
度を多段階に切り換えできるよう構成されたファンモー
タの制御方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air conditioner, and more particularly to a method of controlling a fan motor configured to be able to switch its rotational speed in multiple stages.

〔従来の技術〕[Conventional technology]

ファンモータの回転速度を切り換える回路の一例として
第１図に示すようなものがあるが、この回路は、複数個
の回転速度切換端子Ｔ１〜Ｔ４を有し、商用電源電圧に
より駆動されるファンモータ２と、前記ファンモータ２
の回転速度切換端子Ｔ１〜Ｔ４への電力供給路を切り換
える複数個のリレー接点ＳＷ１、ＳＷ２．！Ｊ３と、電
源電圧波形のゼロクロス時に作動するゼロクロス機能を
有し、前記リレー接点ＳＷＩ、　ＳＷ２．　ＳＷ３に前
記商用電源電圧を供給する制御リレー３と、前記複数個
のリレー接点ＳＷＩ。An example of a circuit for switching the rotational speed of a fan motor is shown in FIG. 2, and the fan motor 2
A plurality of relay contacts SW1, SW2 . ! J3, and the relay contacts SWI, SW2. A control relay 3 that supplies the commercial power supply voltage to SW3, and the plurality of relay contacts SWI.

ＳＷ２．　ＳＷ３および制御リレー３を制御するマイコ
ン４と、前記商用電源電圧を所定の直流電圧に変換して
前記リレー接点ＳＷＩ　、　ＳＷ２．　ＳＷ３のリレー
コイルＲＹＩ、　ＲＹ２．　ＲＹ３、制御リレー３、マ
イコン４等に供給する安定化電源回路等とから成り、ま
た、商用電源電圧波形の周期に同期した割込信号を前記
マイコン４に出力する割込信号発生回路６も設けられて
いたが、この割込信号はファンモータ２の回転速度の切
り換えには利用されておらず、前記リレー接点ＳＷＩ、
　ＳＷ２．　ＳＷ３が切り換えられるとき前記制御リレ
ー３はＯＮ状態のままであった。SW2. A microcomputer 4 that controls the SW3 and the control relay 3, and a microcomputer 4 that converts the commercial power supply voltage into a predetermined DC voltage and connects the relay contacts SWI, SW2. SW3 relay coil RYI, RY2. It consists of a stabilizing power supply circuit that supplies the RY 3, a control relay 3, a microcomputer 4, etc., and is also provided with an interrupt signal generation circuit 6 that outputs an interrupt signal synchronized with the cycle of the commercial power supply voltage waveform to the microcomputer 4. However, this interrupt signal is not used to switch the rotation speed of the fan motor 2, and the relay contact SWI,
SW2. When SW3 was switched, the control relay 3 remained in the ON state.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

しかしながら、上述のように制御リレーがＯＮ状態のま
までリレー接点が切り換え制御される場合、その切り換
えは商用電源電圧波形のゼロクロス点とは無関係な任意
のタイミングで行われることになり、リレー接点の切り
換え時にはファンモータの誘導起電力が発生し、この誘
導起電力の影響でマイコンが誤動作したり、トランジス
タが破壊される等の恐れがあった。However, as described above, when the relay contacts are switched and controlled while the control relay remains in the ON state, the switching is performed at an arbitrary timing unrelated to the zero-crossing point of the commercial power supply voltage waveform, and the relay contacts At the time of switching, induced electromotive force is generated in the fan motor, and there is a risk that the microcomputer may malfunction or the transistor may be destroyed due to the influence of this induced electromotive force.

したがって、本発明においては、上述のような課題を解
決し、マイコン等に悪影響を及ぼす誘導起電力の発生を
極力抑えることのできるファンモータの制御方法を提供
することを目的としている。Therefore, it is an object of the present invention to provide a fan motor control method that can solve the above-mentioned problems and suppress the generation of induced electromotive force that adversely affects a microcomputer and the like as much as possible.

〔課題を解決するための手段〕[Means to solve the problem]

本発明は上記の課題を解決するためになされたものであ
り、複数個の回転速度切換端子を有し、商用電源電圧に
より駆動されるファンモータと、前記ファンモータの回
転速度切換端子への電力供給路を切り換える複数個のリ
レー接点と、電源電圧波形のゼロクロス時に作動するゼ
ロクロス機能を有し、前記リレー接点に前記商用電源電
圧を供給する制御リレーと、前記複数個のリレー接点お
よび制御リレーを制御するマイコンと、前記商用電源電
圧を所定の直流電圧に変換して前記リレー接点のリレー
コイル、制御リレー、マイコン等に供給する安定化電源
回路と、商用電源電圧波形のゼロクロス時に同期した割
込信号を前記マイコンに出力する割込信号発生回路とか
ら成り、前記リレー接点を切り換える際、前記割込信号
に同期させて前記制御リレーを一時的に遮断し、前記フ
ァンモータヘの電力供給を一時停止している間に前記リ
レー接点を切り換えるようにした。The present invention has been made to solve the above problems, and includes a fan motor that has a plurality of rotation speed switching terminals and is driven by a commercial power supply voltage, and a fan motor that has a plurality of rotation speed switching terminals and is driven by a commercial power supply voltage. a plurality of relay contacts for switching supply paths; a control relay having a zero-crossing function that operates at zero-crossing of a power supply voltage waveform and supplying the commercial power supply voltage to the relay contacts; and the plurality of relay contacts and the control relay. A controlling microcomputer, a stabilizing power supply circuit that converts the commercial power supply voltage into a predetermined DC voltage and supplies it to the relay coil of the relay contact, the control relay, the microcomputer, etc., and an interrupt synchronized at the zero cross of the commercial power supply voltage waveform. and an interrupt signal generation circuit that outputs a signal to the microcomputer, and when switching the relay contact, temporarily cuts off the control relay in synchronization with the interrupt signal, and temporarily cuts off the power supply to the fan motor. The relay contact is switched while the vehicle is stopped.

〔作用〕[Effect]

上記の構成であれば、ファンモータヘの電力供給を一時
的に停止している間にリレー接点の切り換えができるの
でファンモータの誘導起電力の発生は無（、制御リレー
のＯＮ１０　Ｆ　Ｆ制御も商用型Ｂ電圧波形のゼロクロ
ス点に同期して行われるので前記誘導起電力を最小限に
抑えることができる。With the above configuration, the relay contacts can be switched while the power supply to the fan motor is temporarily stopped, so no induced electromotive force is generated in the fan motor (and ON10 FF control of the control relay is also possible). Since this is performed in synchronization with the zero-crossing point of the commercial type B voltage waveform, the induced electromotive force can be minimized.

〔実施例〕〔Example〕

以下、本発明の一実施例を第１図〜第２図に基づいて説
明する。Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 and 2.

第１図はファンモータの制御回路で、１は商用電源、２
は複数の回転速度切換端子Ｔ１〜Ｔ４と共通端子Ｔｃｏ
ｍとを有し、商用電源電圧で作動するファンモータ、Ｓ
匈１．　ＳＷ２．　ＳＷ３はそれぞれリレーコイルＲＹ
Ｉ、　ＲＹ２．　ＲＹ３と一体に構成され、前記ファン
モータ２の回転速度切換端子Ｔ１〜Ｔ４への電力供給路
を切り換えるリレー接点、３は電源電圧波形のゼロクロ
ス時に作動するゼロクロス機能を有し、商用型ａ１のラ
インと前記リレー接６．ｓｗ１間の電力供給路を制御す
る制御リレー　４は前記複数個のリレー接点ＳＷＩ　　
（ＲＹＩ　）　、　ＳＷ２　（ＲＹ２　）ＳＷ３　（Ｉ
ｉＹ３）および制御リレー３を制御するマイコン、５は
前記商用電源電圧を所定の直流電圧に変換して前記リレ
ー接点ＳＷＩ　、　ＳＷ２　、　ＳＷ３のリレー　Ｄ　
イルＲＹ１　、　ＲＹ２　、　ＲＹ３　、制御リレー３
、マイコン４等に供給する安定化電源回路、６は商用電
源電圧波形のゼロクロス時に同期した割込信号を前記マ
イコン４に出力する割込信号発生回路、７〜１０はマイ
コン４から出力される信号レベル１１Ｌに対応して作動
し、制御リレー３、リレーコイルＲｖ１．　ＲＹ２．　
ＲＹ３に結合されている直流電源ラインを開閉するイン
バータ（トランジスタ）である。Figure 1 shows the fan motor control circuit, where 1 is the commercial power supply, 2
is a plurality of rotation speed switching terminals T1 to T4 and a common terminal Tco.
m, and a fan motor operated on a commercial power supply voltage, S
Xiong 1. SW2. SW3 is each relay coil RY
I, RY2. Relay contact 3 is configured integrally with RY3 and switches the power supply path to the rotation speed switching terminals T1 to T4 of the fan motor 2. 3 has a zero cross function that operates at the zero cross of the power supply voltage waveform, and is connected to the commercial type a1 line. and the relay contact 6. A control relay 4 controls the power supply path between sw1 and 4 is the plurality of relay contacts SWI.
(RYI), SW2 (RY2)SW3 (I
iY3) and a microcomputer 5 that controls the control relay 3 converts the commercial power supply voltage into a predetermined DC voltage and controls the relay contacts SWI, SW2, and SW3.
RY1, RY2, RY3, control relay 3
, a stabilized power supply circuit that supplies the microcomputer 4, etc., 6 an interrupt signal generation circuit that outputs an interrupt signal to the microcomputer 4 synchronized with the zero-crossing of the commercial power supply voltage waveform, and 7 to 10 signals output from the microcomputer 4. Operates in response to level 11L, control relay 3, relay coil Rv1. RY2.
This is an inverter (transistor) that opens and closes the DC power line connected to RY3.

以下、回路各部の動作について説明する。The operation of each part of the circuit will be explained below.

前記安定化電源回路５は商用電源電圧１００■を直流電
圧５■および１２Ｖに変換する機能を有し、５■の直流
電圧はマイコン４の電源接続ポート■ｄｄと、割込信号
発生回路６の所定の端子Ｔ５とに供給され、１２Ｖの直
流電圧は制御リレー３とリレーコイルＲＹＩ、　ＲＹ２
．　ＲＹ３とに供給される。The stabilized power supply circuit 5 has a function of converting the commercial power supply voltage 100■ to a DC voltage 5■ and 12V, and the DC voltage 5■ is connected to the power supply connection port DD of the microcomputer 4 and the interrupt signal generation circuit 6. The 12V DC voltage is supplied to a predetermined terminal T5 and the control relay 3 and relay coils RYI and RY2.
．． RY3.

割込信号発生回路６はホトカプラ６ａと抵抗Ｒ１゜Ｒ２
、ダイオードＤで構成され、ホトカプラ６ａは商用電源
１の電圧波形の半サイクル毎に作動し、電源電圧波形の
ゼロクロス時に同期した、第２図Ａに示すような割込信
号をマイコン４の入力ボートＩＮＴに出力する。The interrupt signal generation circuit 6 includes a photocoupler 6a and a resistor R1°R2.
, and a diode D, the photocoupler 6a operates every half cycle of the voltage waveform of the commercial power supply 1, and outputs an interrupt signal as shown in FIG. Output to INT.

制御リレー３、リレー接点ＳＷＩ、　ＳＷ２．　ＳＷ３
は全てマイコン４で制御されるが、リレー接点針１゜Ｓ
Ｗ２．ＳＷ３の何れを切り換える場合にも、先ず制御リ
レー３をＯＦＦ状態にした後に切り換え、リレー接点の
切り換え終了後に制御リレー３をＯＮさせるようにして
いる。Control relay 3, relay contact SWI, SW2. SW3
are all controlled by microcomputer 4, but relay contact needle 1°S
W2. When switching any of the SWs 3, the control relay 3 is first turned off and then switched, and the control relay 3 is turned on after the switching of the relay contacts is completed.

第２図はそのタイミングを図示したもので、ファンモー
タ２の回転速度を切り換える場合、第２図の左寄りに示
す破線の位置で制御リレー３をＯＦＦする信号が発せら
れると、マイコン４はインパーク７への出力レベルをＨ
からＬに変え、制御リレー３に供給されている直流電圧
１２Ｖを遮断する。FIG. 2 shows the timing. When switching the rotation speed of the fan motor 2, when a signal is issued to turn off the control relay 3 at the position indicated by the broken line on the left side of FIG. Set the output level to 7 to H.
to L, and cut off the 12V DC voltage supplied to the control relay 3.

直流電圧１２Ｖを遮断された制御リレー３はゼロクロス
機能により電源電圧波形がゼロクロス点、即ち、第２図
の上部に示す割込信号がＨからＬに変わった時点でＯＦ
Ｆされる。The control relay 3 whose DC voltage of 12V is cut off is turned off by the zero-crossing function when the power supply voltage waveform reaches the zero-crossing point, that is, when the interrupt signal shown at the top of Fig. 2 changes from H to L.
F is given.

制御リレー３がＯＦＦされてから、２回目の割込信号が
発生した時点でマイコン４は三つのインバータ８，９．
１０の内、ファンモータ２の回転速度を切り換えるのに
必要な一つ又は複数のインバータの入力レベルを■］か
らしに換え、対応するリレーコイルに供給されている直
流電圧１２Ｖを遮断し、そのリレーコイルに対応するリ
レー接点を切り換える。When the second interrupt signal is generated after the control relay 3 is turned off, the microcomputer 4 switches the three inverters 8, 9 .
10, change the input level of one or more inverters necessary to switch the rotation speed of the fan motor 2 to [■], cut off the 12V DC voltage supplied to the corresponding relay coil, and Switch the relay contact corresponding to the relay coil.

リレー接点が切り換えられた後、次の割込信号でインバ
ータ７の入力レベルをＬからＨに戻し、制御リレー３に
直流電圧１２Ｖを供給して復帰させ、ファンモータ２に
商用電源ｌの電力を供給するように制御している。After the relay contact is switched, the next interrupt signal returns the input level of the inverter 7 from L to H, supplies 12V DC voltage to the control relay 3 to restore it, and powers the fan motor 2 from the commercial power supply l. controlled to supply.

このように、リレー接点ＳＷＩ、　ＳＷ２．　ＳＷ３の
何れを切り換える場合にも、電源周波数のゼロクロス時
に同期させて前記制御リレー３を一時的に０ＦＦＬ、フ
ァンモータ２への電力供給を一時停止している間に必要
なリレー接点を切り換え、その後、制御リレー３を復帰
させるときにも電源周波数のゼロクロス時に同期させる
ようにした。In this way, relay contacts SWI, SW2. When switching any of SW3, the control relay 3 is temporarily set to 0FFL in synchronization with the zero cross of the power supply frequency, and the necessary relay contacts are switched while the power supply to the fan motor 2 is temporarily stopped, and then the necessary relay contacts are switched. Also, when the control relay 3 is reset, it is synchronized at the zero cross of the power supply frequency.

〔発明の効果〕〔Effect of the invention〕

以上、説明したようなファンモータの制御方法であるな
らば、ファンモータヘの電力供給を一時的に停止してい
る間にリレー接点の切り換えができるのでファンモータ
の誘導起電力の発生は無く、制御リレーのＯＮ／○ＦＦ
制御も商用型ａ電圧波形のゼロクロス時に同期して行わ
れるのでマイコン等に悪影響を及ばず誘導起電力の発生
を最小限に抑えることができる。If the fan motor control method described above is used, the relay contacts can be switched while the power supply to the fan motor is temporarily stopped, so no induced electromotive force is generated in the fan motor. Control relay ON/○FF
Since the control is also performed in synchronization with the zero cross of the commercial type a voltage waveform, the generation of induced electromotive force can be minimized without adversely affecting the microcomputer and the like.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例を示すファンモータの制御回
路図、第２図は同実施例の回転速度切り換えのタイミン
グ説明図である。 図中、Ｉ−商用電源、２−ファンモータ、３制御リレー
　４−マイコン、５　安定化電源回路、６　割込信号発
生回路、６ａ−ホ１カプラ、７・〜１０インバータ、ｓ
ｈｉ〜ＳＷ３　　リレー接点、ＲＹＩ〜ＲＹ３　　リレ
ーコイル。 特許用ｌ願人 株式会社富士通ゼネラルFIG. 1 is a control circuit diagram of a fan motor showing one embodiment of the present invention, and FIG. 2 is a diagram illustrating the timing of rotation speed switching in the same embodiment. In the figure, I - commercial power supply, 2 - fan motor, 3 control relay, 4 - microcomputer, 5 stabilizing power supply circuit, 6 interrupt signal generation circuit, 6a - ho 1 coupler, 7.~10 inverter, s
hi~SW3 relay contact, RYI~RY3 relay coil. Patent applicant: Fujitsu General Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 　複数個の回転速度切換端子を有し、商用電源電圧によ
り駆動されるファンモータと、前記ファンモータの回転
速度切換端子への電力供給路を切り換える複数個のリレ
ー接点と、電源電圧波形のゼロクロス時に作動するゼロ
クロス機能を有し、前記リレー接点に前記商用電源電圧
を供給する制御リレーと、前記複数個のリレー接点およ
び制御リレーを制御するマイコンと、前記商用電源電圧
を所定の直流電圧に変換して前記リレー接点のリレーコ
イル、制御リレー、マイコン等に供給する安定化電源回
路と、商用電源電圧波形のゼロクロス時に同期した割込
信号を前記マイコンに出力する割込信号発生回路とから
成り、前記リレー接点を切り換える際、前記割込信号に
同期させて前記制御リレーを一時的に遮断し、前記ファ
ンモータヘの電力供給を一時停止している間に前記リレ
ー接点を切り換えるように制御してなることを特徴とす
るファンモータの制御方法。A fan motor that has a plurality of rotation speed switching terminals and is driven by a commercial power supply voltage, a plurality of relay contacts that switch the power supply path to the rotation speed switching terminal of the fan motor, and a fan motor that has a plurality of rotation speed switching terminals and is driven by a commercial power supply voltage; a control relay that has an activated zero-crossing function and supplies the commercial power supply voltage to the relay contacts; a microcomputer that controls the plurality of relay contacts and the control relay; and a microcomputer that converts the commercial power supply voltage to a predetermined DC voltage. a stabilizing power supply circuit that supplies the relay coil of the relay contact, a control relay, a microcomputer, etc., and an interrupt signal generation circuit that outputs an interrupt signal to the microcomputer in synchronization with the zero-crossing of the commercial power supply voltage waveform; When switching the relay contact, the control relay is temporarily cut off in synchronization with the interrupt signal, and the relay contact is controlled to be switched while the power supply to the fan motor is temporarily stopped. A method of controlling a fan motor, characterized in that:
JP2154855A 1990-06-13 1990-06-13 Control method for fan motor Pending JPH0446584A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2154855A JPH0446584A (en) 1990-06-13 1990-06-13 Control method for fan motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2154855A JPH0446584A (en) 1990-06-13 1990-06-13 Control method for fan motor

Publications (1)

Publication Number Publication Date
JPH0446584A true JPH0446584A (en) 1992-02-17

Family

ID=15593383

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2154855A Pending JPH0446584A (en) 1990-06-13 1990-06-13 Control method for fan motor

Country Status (1)

Country Link
JP (1) JPH0446584A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0814637A (en) * 1994-06-27 1996-01-19 Samsung Electronics Co Ltd Air conditioner operation control device and method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0814637A (en) * 1994-06-27 1996-01-19 Samsung Electronics Co Ltd Air conditioner operation control device and method thereof

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