JPH0352569A

JPH0352569A - Dc and ac invertor

Info

Publication number: JPH0352569A
Application number: JP1182295A
Authority: JP
Inventors: Shoichi Nomoto; 野本　祥一
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-07-19
Filing date: 1989-07-19
Publication date: 1991-03-06
Anticipated expiration: 2013-08-13
Also published as: JP2785239B2

Abstract

PURPOSE:To invert DC into three phase AC of free frequency by sliding a contact of a V shaped lever having an open-angle of 120 deg. mounted on a shaft inserted into the center of an insulating plate, so that it is capable of turning, along three contacts at 120 deg. intervals in the circumferential direction on the insulating plate. CONSTITUTION:Three circular contacts 2 are formed at 120 deg. intervals on the circumferential surface of an insulating plate 1 to connect to three output terminals 1-3. A rotary shaft 10 is inserted into the center of the insulating plate 1 so that it is capable of turning, a V shaped lever 3 having an open-angle of 120 deg. is secured, a contact 4 is provided to the end thereof, and it is capable of sliding along the contacts 2. AC is inputted to slip rings 6 and 7 of the rotary shaft 10 through brushes 8 and 9. The rotary shaft 10 is rotated by a motor 13 through gears 11 and 12. The speed of the motor 13 is controlled by a controller 14. According to the constitution, DC power supply is inverted into three phase AC of free frequency, and it is outputted from the output terminals 1-3.

Description

【発明の詳細な説明】（産業上の利用分野）三相交流電動機を用いる分野で速度制御を要求される分
野である。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) This is a field that uses a three-phase AC motor and requires speed control.

（従来の技術）交流モーターの速度制御は，抵抗制御によるもの等があ
った。(Prior art) Speed control of AC motors has been based on resistance control.

（解決しようとする課題）抵抗制御による場合等では低速になる程電力のロスが大
きくなる欠点があった。(Problem to be solved) In the case of resistance control, etc., there is a drawback that the lower the speed, the greater the power loss.

（課題を解決するための手段）（実施例）本発明は上述
の課題を解決する為になされたもので交流電動機を周波
数によって速度制御し，直流電動機のもつ欠点である整
流子の事故を無くする為に出来る限り交流電動機を用い
る事を目的とする。(Means for Solving the Problems) (Example) The present invention was made to solve the above-mentioned problems, and it controls the speed of an AC motor by frequency, thereby eliminating commutator accidents, which are the drawbacks of DC motors. The aim is to use AC motors as much as possible.

（イ）第１図の如く絶縁板（１）上に１２０°づつ隔て
た３個の接点（２）を円周上に取付ける。(a) As shown in Figure 1, three contacts (2) are mounted on the insulating plate (1) at 120° intervals on the circumference.

（ロ））接点（２）へ夫々導線をつなぎ出力側端子を作
る。(b)) Connect each conductor to contact (2) to create an output terminal.

（ハ）第２図の如く軸（１０）を設けて絶縁板（１）の
中心部へ孔をあけて軸（１０）を通し軸（１０）が回転
できる様にする。(c) As shown in Figure 2, a shaft (10) is provided and a hole is made in the center of the insulating plate (1) so that the shaft (10) can be passed through and the shaft (10) can be rotated.

（ニ）　軸（１０）に１２０°又を開いたＶレバー（３
）を取り付けて接点（２）間のすきまをＶレバー（３）
の接点（４）　，　　（５）の大きさより少し大きくと
る。(d) V lever (3) with a 120° opening on the shaft (10)
) and tighten the gap between the contacts (2) using the V lever (3).
The size of the contacts (4) and (5) should be a little larger.

（ホ）　軸（１０）にスリップリング（６）　．　　（
７）を取り付けてブラシ（８）　，　　（９）と接して
廻せる様にする。(e) Slip ring (6) on shaft (10). (
7) so that it can be rotated in contact with the brushes (8) and (9).

（ヘ）接点（４）とスリップリング（７），接点（５）
とスリップリング（６）を導線で結ぶ。(f) Contact (4), slip ring (7), contact (5)
and the slip ring (6) with a conductor.

（ト）　　ブラシ（８）　，　　（９）に入力側導線を
つなぐ。(g) Connect the input side conductor to the brushes (8) and (9).

（７）　軸（１０）を歯車（１１），　（１２）を介し
て直流モーター（１３）へ連絡する。(7) Connect the shaft (10) to the DC motor (13) via gears (11) and (12).

（（’Ｊ）　　直流モーター（１３）に制御器（１４）を
取り付ける。(('J) Attach the controller (14) to the DC motor (13).

以上の如く構成された直交流変換器であるからこれを用
いる場合には作用）（イ）　第２図に於で直流モーター（１３）によって軸
（１０）を廻わす。Since the DC/AC converter is constructed as described above, it functions when used. (a) In FIG. 2, the shaft (10) is rotated by the DC motor (13).

（（ロ）　軸（１０）に取付けたＶレバー（３）を時計
方向に廻せば，直流入力からブラシ（８）とスリップ１
．１ング（６）を通って接点（５）へ来た電流は接点（
２）を通って出力側端子■へ流れろ。((b) If you turn the V lever (3) attached to the shaft (10) clockwise, the brush (8) and slip 1 will be removed from the DC input.
．． The current that has passed through the first ring (6) to the contact (5) is transferred to the contact (5).
2) and flow to the output terminal ■.

ｅ→　この時出力側端子■から流れた電流は接点（２）
を通ってＶレバーの接点（４）へ流れスリップリング（
７）とブラシ（９）を通って入力側へ流れる。e→ At this time, the current flowing from the output side terminal ■ is the contact (2)
flow through the slip ring (
7) and the brush (9) to the input side.

（ニ）次にＶレバー（３）が時計方向に１２０°回転し
た場合には，入力側からブラシ（８）とスリップリング
（６）を通って接点（５）へ来た電流は接点（２）を通
って出力側端子■へ流れる。(d) Next, when the V lever (3) is rotated 120 degrees clockwise, the current that has come from the input side through the brush (8) and slip ring (6) to the contact (5) will flow to the contact (2). ) and flows to the output terminal ■.

この時出力側端子■から接点（２）と接点（４）を通っ
た電流はスリップリング（７）とブラシ（９）を通り入
力側へ流れる。At this time, the current that has passed through the contacts (2) and (4) from the output side terminal (2) flows to the input side through the slip ring (7) and the brush (9).

更にＶレバー（３）を１２００回転させると入力側から
来る電流はブラシ（８）とスリップリング（６）を通り
■レバーの接点（５）から接点（２）を経て出力側端子
■へ流れる。When the V-lever (3) is further rotated 1200 times, the current coming from the input side passes through the brush (8) and slip ring (6), and flows from the contact point (5) of the lever to the output side terminal (2) via the contact point (2).

この時出力側端子■から出た電流・は接点（２）を通り
Ｖレバー（３）の接点（４）を通ってスリップリング（
７）とブラシ（９）を通って入力側へ流れる。At this time, the current from the output terminal ■ passes through the contact (2), passes through the contact (4) of the V lever (3), and passes through the slip ring (
7) and the brush (9) to the input side.

（７）以上の如く■レバー（３）を時計方向に廻した場
合１つの端子■には第３図の如く位相角２／３π毎に変
化する方形波電流が流れて．他の２つの端子には夫々位
相角が２／３π，４／３π遅れた電流が流れる。(7) As described above, when the ■lever (3) is turned clockwise, a square wave current that changes at every phase angle of 2/3π flows through one terminal ■, as shown in Fig. 3. Currents with phase angles delayed by 2/3π and 4/3π flow through the other two terminals, respectively.

これらの電力の電圧波形図を重ね合わした図が第４図で
ある。FIG. 4 is a diagram in which the voltage waveform diagrams of these powers are superimposed.

この様にして三相交流出力を得る。In this way, three-phase AC output is obtained.

（ホ）（ト）（ヘ）４．（発明の効果）制御装置（１４）によってモーター（１３）の回転数を
変えればＶレバー（３）の回転数が変って周波数が任意
に変えれるので三相交流モーターの速度制御用として効
果がある。(E) (G) (F) 4. (Effect of the invention) If the rotation speed of the motor (13) is changed by the control device (14), the rotation speed of the V lever (3) is changed and the frequency can be arbitrarily changed, so it is effective for controlling the speed of a three-phase AC motor. be.

【図面の簡単な説明】第１図は正面図第２図はＡ−Ａ断而図第３図は端子■の出力電圧の波形図第４図は出力電圧の波形図（三相）１．絶縁板　　　　　　８．　ブラシ２．接点　　　　　　　９．　ブラシ３，　　ｖレバー　　　　１０．軸４．接点　　　　　　１１。歯車[Brief explanation of drawings] Figure 1 is a front view Figure 2 is an A-A diagram. Figure 3 is a waveform diagram of the output voltage of terminal ■. Figure 4 is a waveform diagram of output voltage (three-phase) 1. Insulating board 8. brush 2. Contact point 9. brush 3, v lever 10. shaft 4. Contact point 11. gear

Claims

【特許請求の範囲】（イ）絶縁板（１）上に１２０°づつ隔てた３個の接点
（２）を円周上に取付ける（ロ）接点（２）へ夫々導線をつなぎ出力側端子を作る（ハ）軸（１０）を設けて絶縁板（１）の中心部へ孔を
あけて軸（１０）を通し軸（１０）が回転可能とする（ニ）軸（１０）に１２０°又を開いたＶレバー（３）
を取り付けて接点（２）間のすきまをＶレバー（３）の
接点（４）、（５）の大きさより少し大きくする（ホ）軸（１０）にスリップリング（６）、（７）を取
り付けてブラシ（８）、（９）と接して回転自在とする（ヘ）接点（４）とスリップリング（７）、接点（５）
とスリップリング（６）を導線で結ぶ（ト）ブラシ（８）、（９）に入力側導線をつなぐ（チ
）軸（１０）を歯車（１１）、（１２）を介して直流モ
ーター（１３）へ接続する（リ）直流モーター（１３）に制御器（１４）を設置す
る以上の如く構成された直交流変換器[Claims] (a) Three contacts (2) spaced apart by 120° are installed on the insulating plate (1) on the circumference. (b) A conductor is connected to each contact (2) and an output terminal is connected to the insulating plate (1). (c) Provide a shaft (10), make a hole in the center of the insulating plate (1), and pass the shaft (10) through so that the shaft (10) can rotate. (d) Attach a 120° angle to the shaft (10) V lever opened (3)
Attach the and make the gap between the contacts (2) a little larger than the size of the contacts (4) and (5) of the V lever (3). (E) Attach the slip rings (6) and (7) to the shaft (10). (f) contact (4), slip ring (7), and contact (5)
and the slip ring (6) with a conductor (g) Connect the input side conductor to the brushes (8) and (9) (ch) Connect the shaft (10) to the DC motor (13) via the gears (11) and (12) ) A DC/AC converter configured as above, in which a controller (14) is installed on the DC motor (13) connected to (i) the DC motor (13).