JPH081011Y2 - centrifuge - Google Patents
centrifugeInfo
- Publication number
- JPH081011Y2 JPH081011Y2 JP2162490U JP2162490U JPH081011Y2 JP H081011 Y2 JPH081011 Y2 JP H081011Y2 JP 2162490 U JP2162490 U JP 2162490U JP 2162490 U JP2162490 U JP 2162490U JP H081011 Y2 JPH081011 Y2 JP H081011Y2
- Authority
- JP
- Japan
- Prior art keywords
- motor
- frequency
- revolutions
- rotation speed
- centrifuge
- 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 - Lifetime
Links
Description
【考案の詳細な説明】 〔考案の利用分野〕 本考案は、遠心分離機のような回転機器において、周
波数制御により駆動するモータの回転制御方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Utilization of the Invention] The present invention relates to a rotation control method for a motor driven by frequency control in a rotating device such as a centrifuge.
〔考案の背景〕 遠心分離機のように、回転体を駆動する為のモータを
該モータに与える電力と実回転数から算出した周波数に
より回転制御している。外乱（ノイス等）により、電力
制御回路が誤動作又は故障した場合、実回転数から該モ
ータに与える周波数を算出している為、回転数が任意の
設定回転数より上昇してしまい、回転体の許容回転数又
はモータの最高回転数をこえてしまうという欠点があ
る。[Background of the Invention] Like a centrifuge, a motor for driving a rotating body is rotationally controlled by a frequency calculated from the electric power supplied to the motor and the actual number of revolutions. When the power control circuit malfunctions or fails due to disturbance (noise etc.), the frequency given to the motor is calculated from the actual rotation speed, so the rotation speed rises above an arbitrary set rotation speed, and There is a drawback that the allowable speed or the maximum speed of the motor is exceeded.
本考案の目的は、上記欠点をなくし、回転体を回転さ
せる機器の安全性を向上することである。An object of the present invention is to eliminate the above-mentioned drawbacks and improve the safety of a device that rotates a rotating body.
本考案は、回転体を駆動させるモータの周波数制御
が、マイクロコンピュータで制御できるように構成され
ていることに着目し、外乱により該モータの電力制御回
路が誤動作又は故障した場合でも、回転数の上昇を防止
できるよう設定回転数に到達後は、設定回転数より該モ
ータに与える周波数を算出し、該モータの回転制御を行
うようマイクロコンピュータの制御方式を工夫したもの
である。The present invention focuses on the fact that the frequency control of the motor that drives the rotating body is configured so that it can be controlled by a microcomputer, and even if the power control circuit of the motor malfunctions or fails due to disturbance, The control system of the microcomputer is devised so as to control the rotation of the motor by calculating the frequency given to the motor from the set rotation speed after reaching the set rotation speed so as to prevent the increase.
第１図は本考案の一例を示すブロック図である。第２
図はフローチャートである。第３図は、回転数に対しモ
ータに与える周波数のグラフである。FIG. 1 is a block diagram showing an example of the present invention. Second
The figure is a flow chart. FIG. 3 is a graph of the frequency given to the motor with respect to the rotation speed.
第１図において、回転体を駆動モータ４に取付け、回
転数設定パネル13に入力された回転数で回転させる場
合、加速時は回転数検出センサ８からの回転信号を入力
インターフェース９を通してCPU10に取込み、取込んだ
実回転数から算出した周波数データを周波数制御回路６
に送り駆動モータ４を加速させる。In FIG. 1, when the rotating body is attached to the drive motor 4 and is rotated at the rotation speed input to the rotation speed setting panel 13, the rotation signal from the rotation speed detection sensor 8 is taken into the CPU 10 through the input interface 9 during acceleration. The frequency control circuit 6 calculates the frequency data calculated from the captured actual rotation speed.
The feed drive motor 4 is accelerated.
回転体が、回転数設定パネル13に設定された回転数に
到達後は、設定回転数より周波数制御回路６に送る周波
数データを算出し、駆動モータ４の回転制御を行う。第
３図のグラフに示すように加速時は、回転数によりモー
タに与える周波数が変化するが、設定回転数に到達後
は、実回転数が多少変動してもモータに与える周波数は
一定の値となる。After the rotating body reaches the number of revolutions set on the number-of-revolutions setting panel 13, frequency data to be sent to the frequency control circuit 6 is calculated from the set number of revolutions to control the rotation of the drive motor 4. As shown in the graph in FIG. 3, the frequency applied to the motor changes depending on the number of revolutions during acceleration, but after reaching the set number of revolutions, the frequency given to the motor remains constant even if the actual number of revolutions changes slightly. Becomes
設定回転数に到達後、上記制御を行うことで、外乱
（ノイズ等）による電力制御回路５が誤動作又は故障
し、駆動モータに与える電力が大きくなっても、回転数
が上昇するのを防止する。By performing the above control after reaching the set rotation speed, the rotation speed is prevented from increasing even if the power control circuit 5 malfunctions or malfunctions due to disturbance (noise or the like) and the power supplied to the drive motor increases. .
本考案によれば、外乱（ノイズ等）による回転数の上
昇を防止し安定した駆動モータの制御ができる。According to the present invention, it is possible to prevent the rotation speed from increasing due to disturbance (noise, etc.) and to stably control the drive motor.
第１図は、遠心機のブロック図、第２図はフローチャー
ト、第３図は回転数に対しモータに与える周波数のグラ
フである。 図において、１は電源、２は順変換器、３は逆変換器、
４は駆動モータ、５は電力制御回路、６は周波数制御回
路、７は出力インターフェース、８は回転数検出セン
サ、９は入力インターフェース、10はCPU、11はROM、12
はRAM、13は回転数設定パネルである。FIG. 1 is a block diagram of a centrifuge, FIG. 2 is a flowchart, and FIG. 3 is a graph of frequency given to a motor with respect to rotation speed. In the figure, 1 is a power supply, 2 is a forward converter, 3 is an inverse converter,
4 is a drive motor, 5 is a power control circuit, 6 is a frequency control circuit, 7 is an output interface, 8 is a rotation speed detection sensor, 9 is an input interface, 10 is a CPU, 11 is a ROM, 12
Is RAM and 13 is a rotation speed setting panel.
Claims (1)
回転数を検出する為の回転検出回転と該モータに与える
電力を制御する為の回路と、該モータを周波数制御する
為の周波数発生回路と該モータに与える周波数を回転数
から算出する演算回路をもつ遠心分離機において、任意
の設定回転数に到達後は、該モータに与える周波数を設
定回転数より算出する演算機能を設け、回転制御するこ
とを特徴とした遠心分離機。1. A motor for driving a rotating body, a rotation detecting rotation for detecting the number of rotations of the motor, a circuit for controlling electric power applied to the motor, and a frequency for frequency controlling the motor. In a centrifuge having a generating circuit and an arithmetic circuit for calculating the frequency to be given to the motor from the number of revolutions, provided with an arithmetic function to calculate the frequency to be given to the motor from the set number of revolutions after reaching an arbitrary number of revolutions Centrifuge characterized by rotation control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2162490U JPH081011Y2 (en) | 1990-03-02 | 1990-03-02 | centrifuge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2162490U JPH081011Y2 (en) | 1990-03-02 | 1990-03-02 | centrifuge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03115054U JPH03115054U (en) | 1991-11-27 |
| JPH081011Y2 true JPH081011Y2 (en) | 1996-01-17 |
Family
ID=31524662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2162490U Expired - Lifetime JPH081011Y2 (en) | 1990-03-02 | 1990-03-02 | centrifuge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH081011Y2 (en) |
-
1990
- 1990-03-02 JP JP2162490U patent/JPH081011Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03115054U (en) | 1991-11-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |