JPH08275565A - Single phase induction motor - Google Patents
Single phase induction motorInfo
- Publication number
- JPH08275565A JPH08275565A JP6837695A JP6837695A JPH08275565A JP H08275565 A JPH08275565 A JP H08275565A JP 6837695 A JP6837695 A JP 6837695A JP 6837695 A JP6837695 A JP 6837695A JP H08275565 A JPH08275565 A JP H08275565A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- comparison
- comparator
- input terminal
- reference 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.)
- Pending
Links
Landscapes
- Adjustment And Processing Of Grains (AREA)
- Motor And Converter Starters (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は各種精米機の精白ロー
ラを回転するための単相誘導電動機、及びその他の各種
一般用途に用いられる単相誘導電動機に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-phase induction motor for rotating a whitening roller of various rice polishing machines, and a single-phase induction motor used for various other general purposes.
【０００２】[0002]
【従来の技術】一般に単相誘導電動機は、その回転子が
かご形であり、固定子の主コイルが単相コイルであるの
で、三相コイルの場合のようにそこに回転磁界ができな
いため、自ら起動しないので、例えば、主コイルの他に
コンデンサを接続した補助コイル等による起動手段を備
えることで、自ら起動できるようにしている。2. Description of the Related Art Generally, a single-phase induction motor has a squirrel-cage rotor and a main coil of a stator is a single-phase coil. Since it does not start by itself, for example, it is possible to start by itself by providing a starting means such as an auxiliary coil to which a capacitor is connected in addition to the main coil.
【０００３】このような図２に示すコンデンサ起動型の
単相誘導電動機において、電源電圧の電源スイッチ２と
起動スイッチ４を閉じると、その電動機の回転子は主コ
イル５の電流と運転コンデンサ６と起動コンデンサ７を
経た補助コイル８の電流の位相差によって得られる二相
回転磁界で起動する。In such a capacitor-starting type single-phase induction motor shown in FIG. 2, when the power switch 2 and the starting switch 4 for the power supply voltage are closed, the rotor of the motor causes the current of the main coil 5 and the operating capacitor 6 to operate. It starts with the two-phase rotating magnetic field obtained by the phase difference of the current of the auxiliary coil 8 which passed through the starting capacitor 7.
【０００４】しかしながら、電動機が起動し、その回転
数が回転磁界の同期速度の８０％位の回転数に達する
と、補助コイル８の両端子８ａ、８ｂ間の電圧が上昇
し、そのために増加する電流によって電動機全体が加熱
されるので、その加熱及びそれによる電力のロスを少な
くするため、起動スイッチ４を開いて起動手段、即ち起
動コンデンサ７をその回路から切り離す手段が必要であ
る。However, when the electric motor is started and its rotational speed reaches 80% of the synchronous speed of the rotating magnetic field, the voltage between both terminals 8a and 8b of the auxiliary coil 8 rises and therefore increases. Since the whole electric motor is heated by the electric current, in order to reduce the heating and the loss of electric power due to the heating, a means for opening the starting switch 4, that is, a means for disconnecting the starting capacitor 7, from the circuit is necessary.
【０００５】この起動コンデンサ７の切り離しについて
は、従来よりいくつかあり、例えば、遠心力スイッチに
よる切り離しは電動機の回転子の回転数の上昇による遠
心力の増加を利用して起動スイッチ４を切るものであ
る。これは電動機を据え付ける場所等によって電源電圧
が変動しても、起動スイッチ４を切るときの回転子の回
転数は一定しているので、起動スイッチ４を切るときの
回転数は安定している。しかしその起動スイッチ４を断
続するための遠心力機構そのものに塵埃又は異物が入っ
て動作不良を起こすおそれがある。There are some conventional methods for disconnecting the starting capacitor 7. For example, the centrifugal force switch disconnects the starting switch 4 by utilizing the increase in centrifugal force due to the increase in the rotation speed of the rotor of the electric motor. Is. Even if the power supply voltage fluctuates depending on the place where the electric motor is installed, the rotation speed of the rotor when the start switch 4 is turned off is constant, so the rotation speed when the start switch 4 is turned off is stable. However, there is a risk that dust or foreign matter may enter the centrifugal force mechanism itself for connecting and disconnecting the start-up switch 4 to cause malfunction.
【０００６】また、補助コイル８の電圧の上昇を感知
し、その上昇電圧によって電圧リレーを作動して切り離
すものは電動機の回転数に比例して上昇する補助コイル
８の電圧を利用して、補助コイル８と並列に該電圧リレ
ー（図示を省略している）を接続し、その電圧リレーが
その感動電圧に達するとそれが動作して起動スイッチ４
を切るものである。この電圧リレーは一般にケーシング
等に入っているので、前述の塵埃や異物によって作動を
妨げられるおそれが少ないが、電動機の据え付け場所等
によって電源電圧が低下すると、補助コイル８の電圧も
変動するので、回転子の回転数が所定の回転数になって
も、補助コイル８及びそれと並列接続した電圧リレーの
電圧が所定の電圧にならないので、所定の回転数によっ
て起動スイッチ４を切ることができなくなる。Further, a device that senses a rise in the voltage of the auxiliary coil 8 and actuates and disconnects the voltage relay by the raised voltage utilizes the voltage of the auxiliary coil 8 that rises in proportion to the rotation speed of the motor, The voltage relay (not shown) is connected in parallel with the coil 8, and when the voltage relay reaches the touching voltage, it operates and the start switch 4
Is to cut. Since this voltage relay is generally contained in a casing or the like, it is less likely that its operation will be hindered by the above-mentioned dust or foreign matter. Even if the number of rotations of the rotor reaches a predetermined number of rotations, the voltage of the auxiliary coil 8 and the voltage relay connected in parallel with the auxiliary coil 8 does not reach a predetermined voltage. Therefore, the starting switch 4 cannot be turned off at the predetermined number of rotations.
【０００７】[0007]
【０００８】この発明の目的は、塵埃や異物によって、
その作動が妨げられないような起動コンデンサの切り離
し手段を備えた単相誘導電動機を得ることである。The object of the present invention is to prevent dust and foreign matter from
(EN) A single-phase induction motor having means for disconnecting a starting capacitor whose operation is not disturbed.
【０００９】また、他の目的は、電源電圧の低下によっ
て起動コンデンサの切り離し時における回転数が変動し
ないような起動コンデンサの切り離し手段を備えた単相
誘導電動機を得ることである。Another object of the present invention is to obtain a single-phase induction motor provided with a starting capacitor disconnecting means that does not change the rotation speed when the starting capacitor is disconnected due to a drop in the power supply voltage.
【００１０】[0010]
【課題を解決するための手段】主コイルの両端子間に互
いに直列に接続されている起動スイッチと起動コンデン
サと補助コイルを接続してなる単相誘導電動機におい
て、該主コイルの一端を整流器と基準電圧用分圧抵抗を
介して比較器の基準電圧用入力端子に接続し、また、該
補助コイルの一端を順次別の整流器と比較電圧用分圧抵
抗を介して比較器の比較電圧用入力端子に接続し、起動
直後における比較電圧用入力端子の入力電圧を基準電圧
用入力端子の入力電圧より低くなるように前記基準電圧
用分圧抵抗の抵抗値と、比較電圧用分圧抵抗の抵抗値を
設定し、該比較素子の出力端子と前記起動スイッチを連
動手段を介して結合した単相誘導電動機である。In a single-phase induction motor in which a starting switch, a starting capacitor, and an auxiliary coil connected in series between both terminals of a main coil are connected, one end of the main coil serves as a rectifier. The reference voltage input terminal of the comparator is connected via the reference voltage dividing resistor, and one end of the auxiliary coil is sequentially connected to another rectifier and the reference voltage input of the comparator via the reference voltage dividing resistor. The resistance value of the voltage dividing resistor for the reference voltage and the resistance of the voltage dividing resistor for the comparison voltage are connected so that the input voltage of the input terminal for the comparison voltage immediately after startup becomes lower than the input voltage of the input terminal for the reference voltage. It is a single-phase induction motor in which a value is set and the output terminal of the comparison element and the starting switch are coupled through interlocking means.
【００１１】[0011]
【作用】上記電動機の電源スイッチを入れると、主コイ
ルを流れる電流と起動コンデンサと補助コイルを流れる
電流の位相差によって生ずる回転磁界により、電動機は
起動し始める。このとき、電源電流は主コイルの一端に
接続され整流器によって整流され、その直流電圧は基準
電圧用分圧抵抗によってその電圧を降下させて比較器の
基準電圧用入力端子に印加する。その電圧は比較素子に
おける基準電圧となる。また、補助コイルを流れる電流
はその補助コイルの一端に接続された他の整流器によっ
て整流され、比較電圧用分圧抵抗によりその電圧を前記
基準電圧より降下させて、比較器の比較電圧用入力端子
に印加する。その電圧は比較器における比較電圧とな
る。この比較器は前記基準電圧と比較電圧との差圧を出
力する。比較素子の出力端子と起動スイッチとの間の連
動手段は、比較素子から基準電圧より比較電圧のほうが
大きくなったときの出力を受けると、起動スイッチを開
く。When the power switch of the motor is turned on, the motor starts to start due to the rotating magnetic field generated by the phase difference between the current flowing through the main coil and the current flowing through the starting capacitor and the auxiliary coil. At this time, the power supply current is connected to one end of the main coil and rectified by the rectifier, and the DC voltage is applied to the reference voltage input terminal of the comparator by lowering the voltage by the reference voltage dividing resistor. The voltage becomes a reference voltage in the comparison element. Further, the current flowing through the auxiliary coil is rectified by another rectifier connected to one end of the auxiliary coil, and the voltage is dropped from the reference voltage by the voltage dividing resistor for the comparison voltage, and the input terminal for the comparison voltage of the comparator. Apply to. The voltage becomes the comparison voltage in the comparator. This comparator outputs the differential pressure between the reference voltage and the comparison voltage. The interlocking means between the output terminal of the comparison element and the start switch opens the start switch when receiving an output from the comparison element when the comparison voltage becomes larger than the reference voltage.
【００１２】[0012]
【実施例】この発明の単相誘導電動機の実施例は、図１
に示す如く、主コイル５の両端子５ａ、５ｂの間に順次
直列接続されている起動スイッチ４、起動コンデンサ７
及び補助コイル８を接続してなる単相誘導電動機におい
て、該主コイル５の一方の端子５ａを順次整流器９と基
準電圧用分圧抵抗１０を介して比較器１１の基準電圧用
入力端子１２に接続し、また補助コイル８の一端を順次
別の整流器１３と比較電圧用分圧抵抗１４を介して前記
比較器１１の比較電圧用入力端子１５に接続する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the single-phase induction motor of the present invention is shown in FIG.
As shown in FIG. 4, the starting switch 4 and the starting capacitor 7 which are connected in series between both terminals 5a and 5b of the main coil 5 in sequence.
In the single-phase induction motor having the auxiliary coil 8 connected, one terminal 5a of the main coil 5 is sequentially connected to the reference voltage input terminal 12 of the comparator 11 via the rectifier 9 and the reference voltage dividing resistor 10. Also, one end of the auxiliary coil 8 is sequentially connected to the comparison voltage input terminal 15 of the comparator 11 via another rectifier 13 and the comparison voltage dividing resistor 14.
【００１３】また、電源スイッチ２を入れて回転子３を
起動してその直後における主コイル電圧Ｖ5 が１００
Ｖ、補助コイル電圧Ｖ8 が６０Ｖであったとすると、比
較電圧用入力端子１５の比較直流電圧Ｖ15を基準電圧用
入力端子１２の基準直流電圧Ｖ 12より小さく、例えば比
較直流電圧Ｖ15を２Ｖ、基準直流電圧Ｖ12を４Ｖ、即
ち、その割合Ｖ15／Ｖ12を１／２になるように基準電圧
用分圧抵抗１０の抵抗値Ｒ 10と比較電圧用分圧抵抗１４
の抵抗値Ｒ14を、分圧抵抗２０の抵抗値Ｒ20＝分圧抵抗
２２の抵抗値Ｒ22＜＜Ｒ10，Ｒ14とすれば、（Ｖ8 ／Ｖ
12）／（Ｒ14／Ｒ10）＝１／２となり、例えばＲ10を１
００Ｋオーム、Ｒ14を１２０Ｋオームに設定する。The power switch 2 is turned on and the rotor 3 is turned on.
Main coil voltage V immediately after startingFive Is 100
V, auxiliary coil voltage V8 Is 60V, the ratio
Comparison DC voltage V of the comparison voltage input terminal 15FifteenFor reference voltage
Reference DC voltage V of input terminal 12 12Smaller, eg ratio
Comparative DC voltage VFifteen2V, reference DC voltage V124V immediately
The ratio VFifteen/ V12The reference voltage so that
Resistance R of the voltage dividing resistor 10 TenAnd voltage dividing resistor 14 for comparison voltage
Resistance value R14Is the resistance value R of the voltage dividing resistor 2020= Voltage division resistance
22 resistance Rtwenty two<< RTen, R14Then, (V8 / V
12) / (R14/ RTen) = 1/2, for example RTen1
00K ohm, R14To 120K ohms.
【００１４】さらに、該比較器１１の出力端子１６と前
記起動スイッチ４をリレー１７等の連動手段を介して結
合したものである。Further, the output terminal 16 of the comparator 11 and the starting switch 4 are connected via interlocking means such as a relay 17.
【００１５】前記主コイル５の両端子５ａ、５ｂには電
源スイッチ２を介して単相交流電源１を接続し、その電
源スイッチ２を閉じて電源電圧Ｖを主コイル５の両端子
５ａ、５ｂ間及び補助コイル８と起動コンデンサ７の直
列回路に印加する。A single-phase AC power supply 1 is connected to both terminals 5a, 5b of the main coil 5 via a power switch 2, and the power switch 2 is closed to supply a power supply voltage V to both terminals 5a, 5b of the main coil 5. And to the series circuit of the auxiliary coil 8 and the starting capacitor 7.
【００１６】このとき、主コイル５を流れる単相交流
と、補助コイル８を流れる起動コンデンサ７によって位
相の進んだ単相交流による二相回転磁界によって回転子
３を回転し始める。At this time, the single-phase alternating current flowing through the main coil 5 and the two-phase rotating magnetic field of the single-phase alternating current whose phase is advanced by the starting capacitor 7 flowing through the auxiliary coil 8 start rotating the rotor 3.
【００１７】このとき、前記基準電圧用入力端子１２に
は整流器９により整流され、かつ分圧抵抗１０で電圧降
下された基準直流電圧Ｖ12が印加され、また比較電圧用
入力端子１５には整流器１３で整流され、分圧抵抗１４
で電圧降下された比較直流電圧Ｖ15が印加される。At this time, the reference DC voltage V 12 rectified by the rectifier 9 and dropped by the voltage dividing resistor 10 is applied to the reference voltage input terminal 12, and the rectifier is applied to the comparison voltage input terminal 15. It is rectified by 13 and the voltage dividing resistor 14
The comparison DC voltage V 15 whose voltage has been dropped by is applied.
【００１８】その際、比較直流電圧Ｖ15が基準直流電圧
Ｖ12より低くなるように、前記比較電圧用分圧抵抗１４
の抵抗値Ｒ14、及び基準電圧用分圧抵抗１０の抵抗値Ｒ
10を予め設定してあるので、そのときの基準直流電圧Ｖ
12と比較直流電圧Ｖ15によっては比較器１１の出力端子
１６からリレー１７を作動させる出力が発生しない。At this time, the voltage dividing resistor 14 for the comparison voltage is set so that the comparison DC voltage V 15 becomes lower than the reference DC voltage V 12.
Resistance value R 14 and the resistance value R of the reference voltage dividing resistor 10
Since 10 is preset, the reference DC voltage V at that time
Depending on 12 and the comparison DC voltage V 15 , an output for operating the relay 17 is not generated from the output terminal 16 of the comparator 11.
【００１９】そのため、リレー１７は作動しないので、
これによって、前記起動スイッチ４は閉路したままであ
り、起動コンデンサ７には電源電圧Ｖが印加されたまま
である。Therefore, since the relay 17 does not operate,
As a result, the starting switch 4 remains closed and the power supply voltage V is still applied to the starting capacitor 7.
【００２０】回転子３が始動してからこの状態で時間が
経過して回転子３の回転速度が高くなると、それにつれ
て補助コイル８の両端子８ａ、８ｂ間の電圧Ｖ8 が始動
時の電圧より上昇し、例えば始動時の電圧Ｖ8 が６０Ｖ
から１２０Ｖに、即ち１００％上昇する。When the rotational speed of the rotor 3 increases as time elapses in this state after the rotor 3 is started, the voltage V 8 between the terminals 8a and 8b of the auxiliary coil 8 is correspondingly increased at the time of starting. Further, for example, the voltage V 8 at the time of starting is 60V
To 120V, or 100% increase.
【００２１】この間に基準直流電圧Ｖ12（前例の場合４
Ｖ）はそのままの状態であるが、比較直流電圧Ｖ15は、
補助コイル８の両端子８ａ、８ｂ間の電圧Ｖ8 が上昇
し、前述のように６０Ｖから１２０Ｖに上昇して、１０
０％増加する。例えば前例の場合で述べれば、比較直流
電圧Ｖ15は、１００％増加して２Ｖから４Ｖに増加し、
運転開始時の基準直流電圧Ｖ12と等しくなる。During this period, the reference DC voltage V 12 (4 in the case of the previous example)
V) remains as it is, but the comparison DC voltage V 15 is
The voltage V 8 between both terminals 8a and 8b of the auxiliary coil 8 rises and rises from 60V to 120V as described above,
Increase by 0%. For example, in the case of the previous example, the comparison DC voltage V 15 increases by 100% and increases from 2V to 4V.
It becomes equal to the reference DC voltage V 12 at the start of operation.
【００２２】このときの比較器１１の出力端子１６から
の出力によって前記起動スイッチ４を遮断し、起動コン
デンサ７を補助コイル８の回路から除去し、以後補助コ
イル８によって発生する電圧の増加を防止し、主コイル
５によって回転子３を通常の回転数で運転する。At this time, the starting switch 4 is cut off by the output from the output terminal 16 of the comparator 11, the starting capacitor 7 is removed from the circuit of the auxiliary coil 8, and the increase of the voltage generated by the auxiliary coil 8 thereafter is prevented. Then, the main coil 5 drives the rotor 3 at a normal rotation speed.
【００２３】本発明の電動機を据え付ける場所によっ
て、例えば１００Ｖである筈の電源電圧が８０Ｖになっ
たり、或いは、その電源から電動器までの電源コードが
長いために前記電源電圧が８０Ｖに低下したりした場合
は、主コイル５に印加される電圧と補助コイル８に印加
される電圧は同様に低下するので、これらに接続されて
いる比較器１１における基準直流電圧Ｖ１２と比較直流
電圧Ｖ１５は両者が夫々同じ割合で低下するため、その
ときの比較直流電圧Ｖ15が基準直流電圧Ｖ12に等しくな
るとき、即ち両電圧の比Ｖ15／Ｖ12＝１になって、起動
スイッチ４を遮断するときの比較直流電圧の上昇割合は
前記電源電圧Ｖが低下しない場合のそれと比較して変わ
らない。そのため起動スイッチを遮断するまでの間に消
費する電力は前述の電源電圧が低下しない場合と比較し
て増加することがない。Depending on the place where the electric motor of the present invention is installed, the power supply voltage, which should be 100 V, becomes 80 V, or the power supply voltage from the power supply to the electric motor is long and the power supply voltage drops to 80 V. In such a case, the voltage applied to the main coil 5 and the voltage applied to the auxiliary coil 8 similarly decrease, so that the reference DC voltage V12 and the comparison DC voltage V15 in the comparator 11 connected to them are both When the comparison DC voltage V 15 at that time becomes equal to the reference DC voltage V 12, that is, when the ratio of both voltages V 15 / V 12 = 1 and the start switch 4 is cut off, the voltage decreases at the same rate. The increase rate of the comparative DC voltage is the same as that in the case where the power supply voltage V does not decrease. Therefore, the power consumed until the start switch is cut off does not increase as compared with the case where the power supply voltage does not drop.
【００２４】これに対して前記従来のもののように電圧
リレーを用いて、補助コイル８の電圧Ｖ8 が所定の電
圧、例えば前例と同様に始動時の電圧より１００％上昇
した電圧になったとき、即ち、補助コイル８の電圧Ｖ8
が６０Ｖから１２０Ｖになったときに起動スイッチ４を
遮断するものは、電源電圧Ｖが、例えば、１００Ｖある
筈のものが８０Ｖまで低下すると、回転子の回転速度が
モーター固有の同期速度にまで達しているにも拘らず、
補助コイル８の電圧Ｖ8 が１２０Ｖにまで上昇し得ず、
従って電圧リレーは作動し得ず、起動時の過大な電流が
流れつづけるため、発熱による焼損のおそれがある。On the other hand, when the voltage V 8 of the auxiliary coil 8 becomes a predetermined voltage, for example, a voltage which is 100% higher than the voltage at the start as in the previous example, by using the voltage relay as in the conventional device. That is, the voltage V 8 of the auxiliary coil 8
When the power supply voltage V is 100V, for example, when the power supply voltage V drops to 80V, the rotation speed of the rotor reaches the synchronous speed peculiar to the motor. Despite being
Voltage V 8 of the auxiliary coil 8 is increased to 120V Eze,
Therefore, the voltage relay cannot operate, and an excessive current continues to flow at the time of startup, which may cause burnout due to heat generation.
【００２５】なお、図中６は、一方の端子５ａと補助コ
イル８の端子８ａとの間に接続した運転コンデンサであ
り、２０は基準電圧用分圧抵抗１０と直列接続した分圧
抵抗、２１は前記分圧抵抗２０と並列接続した平滑コン
デンサ、２２は比較電圧用分圧抵抗１４と直列接続した
分圧抵抗、２３は前記分圧抵抗２２と並列接続した平滑
コンデンサである。In the figure, 6 is an operating capacitor connected between one terminal 5a and the terminal 8a of the auxiliary coil 8, 20 is a voltage dividing resistor connected in series with the reference voltage dividing resistor 10 and 21 Is a smoothing capacitor connected in parallel with the voltage dividing resistor 20, 22 is a voltage dividing resistor connected in series with the voltage dividing resistor 14 for comparison voltage, and 23 is a smoothing capacitor connected in parallel with the voltage dividing resistor 22.
【００２６】また、前記比較器１１の比較電圧用入力端
子１５と出力端子１６とを抵抗２４を介して接続して帰
還回路を設け、これによりヒステリシス特性をもたせ、
比較器１１の出力の動作と復帰との間に幅をつくり、出
力の断続によるチャタリング現象を防止することができ
る。Further, a feedback circuit is provided by connecting the comparison voltage input terminal 15 and the output terminal 16 of the comparator 11 via a resistor 24, thereby providing a hysteresis characteristic.
It is possible to prevent the chattering phenomenon due to the intermittent output by providing a width between the operation and the return of the output of the comparator 11.
【００２７】以上本発明の実施例を添付図面に基づき説
明したが、それに限定されるものでなく、本発明の構成
をその範囲内で部分的に変更したり、付加して実施する
ことができ、例えば、リレー１７及び起動スイッチ４に
代えて、半導体リレーを用いることで無接点化が可能で
あり、この場合、発光素子及び受光素子からなる半導体
リレーを用いることができる（図示省略）。The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited thereto, and the construction of the present invention can be partially modified or added within the scope thereof. For example, instead of the relay 17 and the activation switch 4, a semiconductor relay can be used to make contactless, and in this case, a semiconductor relay including a light emitting element and a light receiving element can be used (not shown).
【００２８】[0028]
【発明の効果】この発明は、上述の通りであるので、前
記従来例の遠心力スイッチによって起動スイッチを切る
場合のように機械的可動部分がないので、その遠心力ス
イッチの内部に塵埃や異物が蓄積したり、或いは虫の巣
等をつくられることにによってその機能を妨げられるこ
とがなく、また電気的部分の接続で構成できるため簡単
な構造で安価に製造できる。Since the present invention is as described above, there is no mechanically movable part as in the case where the starting switch is turned off by the centrifugal force switch of the conventional example described above, and therefore, there is no dust or foreign matter inside the centrifugal force switch. The function is not hindered by the accumulation of electricity or the formation of insect nests, and since it can be constructed by connecting the electric parts, it can be manufactured with a simple structure at low cost.
【００２９】さらにこの発明は、主コイルの一端を整流
器と基準電圧用分圧抵抗を介して比較器の基準電圧用入
力端子に接続し、また、該補助コイルの一端を別の整流
器と比較電圧用分圧抵抗を介して比較器の比較電圧用入
力端子に接続し、起動直後における比較電圧用入力端子
の入力電圧を基準電圧用入力端子の入力電圧より低くな
るように前記基準電圧用分圧抵抗の抵抗値と、比較電圧
用分圧抵抗の抵抗値を設定し、該比較素子の出力端子と
前記起動スイッチを連動手段を介して結合しているの
で、本発明の電動機を据え付ける場所等によって、電源
電圧が低下した場合でも、主コイルに印加される電圧と
補助コイルに印加される電圧は同様に低下するので、各
分圧抵抗を介してこれらに接続されている比較器におけ
る基準直流電圧と比較直流電圧は両者が夫々同じ割合で
低下するため、予め低く設定されている比較直流電圧Ｖ
15が基準直流電圧Ｖ12まで上昇して起動スイッチを遮断
するときの比較直流電圧の上昇割合は前記電源電圧が低
下しない場合のそれと比較して変わらないので、起動ス
イッチを遮断するまでの間に消費する電力も前記電源電
圧が低下しない場合と比較して余分に消費したり、電動
機を焼損したりするおそれがない。Further, according to the present invention, one end of the main coil is connected to the reference voltage input terminal of the comparator through the rectifier and the reference voltage dividing resistor, and one end of the auxiliary coil is connected to another rectifier and the comparison voltage. It is connected to the reference voltage input terminal of the comparator through a voltage divider resistor, and the reference voltage divider is applied so that the input voltage of the reference voltage input terminal immediately after startup becomes lower than the input voltage of the reference voltage input terminal. Since the resistance value of the resistor and the resistance value of the voltage dividing resistor for the comparison voltage are set, and the output terminal of the comparison element and the start switch are coupled through interlocking means, depending on the place where the electric motor of the present invention is installed, etc. , Even when the power supply voltage drops, the voltage applied to the main coil and the voltage applied to the auxiliary coil also drop, so the reference DC voltage in the comparator connected to them via each voltage dividing resistor. And ratio Because DC voltage to both decrease with each the same rate, compared DC voltage V which is preset low
Since the rate of increase of the comparative DC voltage when 15 rises to the reference DC voltage V 12 and shuts off the start switch is the same as that when the power supply voltage does not decrease, the time until the start switch is shut off is increased. Compared to the case where the power supply voltage does not decrease, the consumed power does not excessively consume and there is no fear of burning the electric motor.
【図１】本願発明の実施例を示す単相誘導電動機の回路
図である。FIG. 1 is a circuit diagram of a single-phase induction motor showing an embodiment of the present invention.
【図２】従来例の単相誘導電動機の回路図である。FIG. 2 is a circuit diagram of a conventional single-phase induction motor.
４ 起動スイッチ ５ 主コイル ７ 起動コンデンサ ８ 補助コイル ９ 整流器 １０ 基準電圧用分圧抵抗 １１ 比較器 １２ 基準電圧用入力端子 １３ 整流器 １４ 比較電圧用分圧抵抗 １５ 比較電圧用入力端子 １６ 出力端子 １７ リレー 4 Start Switch 5 Main Coil 7 Start Capacitor 8 Auxiliary Coil 9 Rectifier 10 Reference Voltage Dividing Resistor 11 Comparator 12 Reference Voltage Input Terminal 13 Rectifier 14 Comparison Voltage Dividing Resistor 15 Comparison Voltage Input Terminal 16 Output Terminal 17 Relay
Claims (3)
れている起動スイッチと起動コンデンサと補助コイルを
接続してなる単相誘導電動機において、該主コイルの一
端を整流器と基準電圧用分圧抵抗を介して比較器の基準
電圧用入力端子に接続し、また、該補助コイルの一端を
別の整流器と比較電圧用分圧抵抗を介して比較器の比較
電圧用入力端子に接続し、起動直後における比較電圧用
入力端子の入力電圧を基準電圧用入力端子の入力電圧よ
り低くなるように前記基準電圧用分圧抵抗の抵抗値と、
比較電圧用分圧抵抗の抵抗値を設定し、該比較素子の出
力端子と前記起動スイッチを連動手段を介して結合した
ことを特徴とする単相誘導電動機1. A single-phase induction motor comprising a starting switch, a starting capacitor, and an auxiliary coil connected in series between both terminals of a main coil, wherein one end of the main coil has a rectifier and a reference voltage component. Connected to the reference voltage input terminal of the comparator via the piezoresistor, and also connecting one end of the auxiliary coil to the comparison voltage input terminal of the comparator via another rectifier and the comparison voltage dividing resistor, The resistance value of the reference voltage dividing resistor so that the input voltage of the comparison voltage input terminal immediately after startup is lower than the input voltage of the reference voltage input terminal,
A resistance value of a voltage dividing resistor for a comparison voltage is set, and an output terminal of the comparison element and the starting switch are coupled through interlocking means, and a single-phase induction motor.
入力端子の結合部と主コイルの他端の間に平滑回路を設
け、比較電圧用分圧抵抗と比較器の比較電圧用入力端子
の結合部と補助コイルの他端の間に別の平滑回路を設け
たことを特徴とする請求項１記載の単相誘導電動機2. A smoothing circuit is provided between the connecting portion of the reference voltage dividing resistor and the reference voltage input terminal of the comparator and the other end of the main coil, and the comparison voltage dividing resistor and the comparator comparison voltage are provided. The single-phase induction motor according to claim 1, wherein another smoothing circuit is provided between the coupling portion of the input terminal and the other end of the auxiliary coil.
出力端子との間に帰還回路を設けたことを特徴とする請
求項１又は２記載の単相誘導電動機3. A single-phase induction motor according to claim 1, wherein a feedback circuit is provided between the comparison voltage input terminal of the comparator and the output terminal of the comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6837695A JPH08275565A (en) | 1995-03-27 | 1995-03-27 | Single phase induction motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6837695A JPH08275565A (en) | 1995-03-27 | 1995-03-27 | Single phase induction motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08275565A true JPH08275565A (en) | 1996-10-18 |
Family
ID=13371974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6837695A Pending JPH08275565A (en) | 1995-03-27 | 1995-03-27 | Single phase induction motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08275565A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001061284A (en) * | 1999-08-20 | 2001-03-06 | Fujitsu General Ltd | Starter for induction capacitor motor |
-
1995
- 1995-03-27 JP JP6837695A patent/JPH08275565A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001061284A (en) * | 1999-08-20 | 2001-03-06 | Fujitsu General Ltd | Starter for induction capacitor motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1100190B1 (en) | Device and method for controlling the current supply and the static capacitance of a compressor | |
| US3414789A (en) | Solid-state motor starting circuit | |
| US7327118B2 (en) | Electric machine and method of operating the electric machine | |
| JPS61139285A (en) | Starting of motor and control circuit therefor | |
| US4225812A (en) | Electric motor control system | |
| JP4153586B2 (en) | Air conditioner | |
| EP0324219B1 (en) | Series resonant capacitor motor | |
| JP2007507992A (en) | Single-phase induction motor starting device and starting method | |
| CA2160445C (en) | Three phase motor conversion and monitoring circuit | |
| WO2009001285A2 (en) | System for controlling the steady-state rotation of a synchronous electric motor | |
| JP3747637B2 (en) | Electric washing machine | |
| JPH08275565A (en) | Single phase induction motor | |
| EP2253062B1 (en) | Method and device for starting single-phase asynchronous motors | |
| JP2598911B2 (en) | Control device for grid-connected inverter | |
| CN113364305A (en) | Frequency converter for controlling rotating speed of variable frequency compressor and control method thereof | |
| KR101549864B1 (en) | Apparatus and method for controlling single-phase induction motor | |
| JP4752105B2 (en) | Start-up circuit for single-phase AC induction motor | |
| JP2003135341A (en) | Vacuum cleaner | |
| JPS6032583A (en) | Starter of single phase compressor | |
| JPS6373897A (en) | Variable speed operation device of motor | |
| US11277081B2 (en) | Device and method for switching in and out a start winding of a single phase ac motor | |
| JP4316910B2 (en) | Single-phase motor pump starter | |
| JP2000032786A (en) | Starter for single-phase induction motor | |
| JPS5915265Y2 (en) | Compressor motor starting device | |
| JP3257026B2 (en) | Non-contact switch circuit device |