JPS6333024U

JPS6333024U -

Info

Publication number: JPS6333024U
Application number: JP12585986U
Authority: JP
Priority date: 1986-08-20
Filing date: 1986-08-20
Publication date: 1988-03-03
Also published as: JPH047379Y2

Description

[Brief explanation of the drawing]

第１図ａは本案実施例全体の概略構成を示す側
面図、第１図ｂは関係位置を示す側面図である。
第２図は検出電流信号とギヤツプ信号から各軸受
の軸受分力を得るための第１の演算器のブロツク
図、第３図は第１の演算器の信号を合成して力の
大きさと方向を得る第２の演算器のブロツク図、
第４図は異なる実施例における第２の演算器のブ
ロツク図である。１……ロータ、２……工具、３―１Ｘ……電磁
石、３―１Ｙ……電磁石、３―２Ｘ……電磁石、
３―２Ｙ……電磁石、３―３Ｘ……電磁石、３―
３Ｙ……電磁石、３―４Ｘ……電磁石、３―４Ｙ
……電磁石、４―１Ｘ……ギヤツプセンサ、４―
１Ｙ……ギヤツプセンサ、４―２Ｘ……ギヤツプ
センサ、４―２Ｙ……ギヤツプセンサ、６―１…
…磁気軸受制御器、６―２……磁気軸受制御器、
７，１５……加算器、８，１１，１３―１，１３
―２……減算器、９―１，９―２，１７……除算
器、１０―１……乗算器、１０―２……乗算器、
１４―１……乗算器、１４―２……乗算器、１９
……乗算器、１６……演算器、１８……ｔａｎ^−
１演算器、２０……係数器、２１……係数乗算器
。 FIG. 1a is a side view showing a schematic configuration of the entire embodiment of the present invention, and FIG. 1b is a side view showing related positions.
Figure 2 is a block diagram of the first computing unit that obtains the bearing component force of each bearing from the detected current signal and gap signal, and Figure 3 is a block diagram of the first computing unit that synthesizes the signals of the first computing unit to determine the magnitude and direction of the force. A block diagram of the second arithmetic unit that obtains
FIG. 4 is a block diagram of the second arithmetic unit in a different embodiment. 1... Rotor, 2... Tool, 3-1X... Electromagnet, 3-1Y... Electromagnet, 3-2X... Electromagnet,
3-2Y...Electromagnet, 3-3X...Electromagnet, 3-
3Y...Electromagnet, 3-4X...Electromagnet, 3-4Y
...Electromagnet, 4-1X...Gap sensor, 4-
1Y...Gap sensor, 4-2X...Gap sensor, 4-2Y...Gap sensor, 6-1...
...Magnetic bearing controller, 6-2...Magnetic bearing controller,
7, 15...Adder, 8, 11, 13-1, 13
-2... Subtractor, 9-1, 9-2, 17... Divider, 10-1... Multiplier, 10-2... Multiplier,
14-1... Multiplier, 14-2... Multiplier, 19
... Multiplier, 16 ... Arithmetic unit, 18 ... tan ^{−
1} arithmetic unit, 20... coefficient unit, 21... coefficient multiplier.

Claims

[Claims for Utility Model Registration] (1) Two sets of electromagnets orthogonal to each other are arranged on the load side and anti-load side, and a load such as a processing tool is installed at the end of the shaft on the load side, and the rotor and stator are connected. In a magnetic bearing motor in which a gap is detected by a gap sensor and the electromagnet is controlled by the detection signal to support the rotor in the air, the orthogonal attraction force of each bearing is determined from the excitation current signal of the electromagnet and the output signal of the gap sensor. A load detection device for a magnetic bearing motor, comprising: a first calculator that calculates a signal; and a second calculator that calculates a load from the orthogonal attraction force signals and calculates a vector. . (2) The first calculating unit calculates an attractive force signal orthogonal to the excitation current signals of the load-side and anti-load-side electromagnets and the output signals of the respective gap sensors. A load detection device for a magnetic bearing motor according to item 1. (3) Load detection of a magnetic bearing motor according to claim 2, wherein the second computing unit performs vector calculation of the load based on the load side and counter-load side attraction force signals. Device. (4) The load of the magnetic bearing motor according to claim 2, wherein the second calculating unit performs vector calculation of the load based only on the load side bearing or the counter-load side attraction force signal. Load detection device.