JPH0260498U

JPH0260498U -

Info

Publication number: JPH0260498U
Application number: JP16038788U
Authority: JP
Priority date: 1988-06-02
Filing date: 1988-12-12
Publication date: 1990-05-02

Description

[Brief explanation of drawings]

第１図〜第４図は本考案の第１実施例を示し、
第１図はブラシレスモータ駆動系全体のブロツク
図、第２図はトルク変動補正系を示すブロツク図
、第３図はトルク変動波形と補正トルクデータの
関係を示す図、第４図は本考案のトルク変動補正
装置による摩擦トルクを求めるためのフローチヤ
ート、第５図〜第８図は本考案の第２実施例を示
し、第５図はブラシレスモータ駆動系全体を示す
ブロツク図、第６図は抵抗切換え手段の回路図、
第７図は巻線コイルに流れる電流の応答図、第８
図は通電タイミングと速度変動を示す説明図、第
９図〜第１５図は本考案の第３実施例を示し、第
９図は補助溝付コアの正面図、第１０図は第９図
における溝部の磁束分布を示す断面図、第１１図
はロータマグネツトの着磁状態を示す説明図、第
１２図は通電タイミングと電流の関係を示す説明
図、第１３図はブラシレスモータの発生トルクを
示す説明図、第１４図はトルク変動補正系のブロ
ツク図、第１５図は誘起電圧、誘起電圧補正デー
タ、電流補正データ、発生トルクの関係を示す説
明図、第１６図〜第１８図は従来例を示し、第１
６図ａはブラシレスモータの側面断面図、第１６
図ｂはブラシレスモータの正面図、第１７図はブ
ラシレスモータの通電タイミングと誘起電圧波形
を示す図、第１８図はトルク変動と回転角の関係
を示す図である。２１……摩擦トルク演算手段、２５，２６，２
７……回転制御手段、２９，３０……回転角及び
回転速度検出手段、３２……抵抗切換手段。 1 to 4 show a first embodiment of the present invention,
Fig. 1 is a block diagram of the entire brushless motor drive system, Fig. 2 is a block diagram showing the torque fluctuation correction system, Fig. 3 is a diagram showing the relationship between the torque fluctuation waveform and correction torque data, and Fig. 4 is a diagram of the present invention. A flowchart for determining the friction torque by the torque fluctuation correction device, FIGS. 5 to 8 show the second embodiment of the present invention, FIG. 5 is a block diagram showing the entire brushless motor drive system, and FIG. Circuit diagram of resistance switching means,
Figure 7 is a response diagram of the current flowing through the winding coil, Figure 8
The figure is an explanatory diagram showing the energization timing and speed fluctuation, Figures 9 to 15 show the third embodiment of the present invention, Figure 9 is a front view of the auxiliary grooved core, and Figure 10 is the same as in Figure 9. Fig. 11 is an explanatory diagram showing the magnetized state of the rotor magnet, Fig. 12 is an explanatory diagram showing the relationship between energization timing and current, and Fig. 13 is an explanatory diagram showing the generated torque of the brushless motor. FIG. 14 is a block diagram of the torque fluctuation correction system. FIG. 15 is an explanatory diagram showing the relationship among induced voltage, induced voltage correction data, current correction data, and generated torque. FIGS. 16 to 18 are conventional diagrams. For example, the first
Figure 6a is a side sectional view of the brushless motor, No. 16
FIG. 17 is a diagram showing the energization timing and induced voltage waveform of the brushless motor, and FIG. 18 is a diagram showing the relationship between torque fluctuation and rotation angle. 21...Friction torque calculation means, 25, 26, 2
7...Rotation control means, 29, 30...Rotation angle and rotation speed detection means, 32...Resistance switching means.

Claims

[Claims for Utility Model Registration] (1) A brushless motor that has multiple winding coils and a multipolar magnetized permanent magnet, and is driven to rotate by sequentially switching the current flowing through the coils. The motor is characterized by comprising a rotation angle and rotation speed detection means for the motor, a friction torque calculation means for the motor, and a rotation control means for controlling the drive voltage of the motor from the rotation angle and friction torque. Torque fluctuation correction device for brushless motors. (2) The brushless motor according to claim 1, characterized in that the winding coil is provided with a resistance switching means that connects a resistor in series during low speed rotation and energizes only the winding coil during high speed rotation. Torque fluctuation correction device. (3) Data for correcting torque ripple due to fluctuations in induced voltage of the brushless motor and data for correcting a current delay at the time of energization switching are added to the friction torque calculation means.
(1) The brushless motor torque fluctuation correction device described in (1).