JPS6374094U

JPS6374094U -

Info

Publication number: JPS6374094U
Application number: JP1986166873U
Authority: JP
Priority date: 1986-10-30
Filing date: 1986-10-30
Publication date: 1988-05-17

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す構成説明図
、第２図は第１図の集積回路の１つを取出して示
すブロツク図、第３図は更に第２図の回路を詳し
く示す回路図、第４図は第３図の極性制御回路を
取出して示す回路図、第５図と第６図は、１セン
サ方式ブラシレスモータのステータとロータの例
を示す説明図、第７図、第８図は複数センサ方式
ブラシレスモータのステータの例を示す説明図、
第９図は複数センサ方式ブラシレスモータのロー
タの例を示す説明図である。４１，４２……モータ駆動用集積回路、Ｌ１１
〜Ｌ１４……ステータ巻線、４６……逆転制御端
子、５１……ホール素子、５２……高利得増幅器
、５３……極性制御回路、５４……出力増幅器、
５５……速度制御回路。 Fig. 1 is a configuration explanatory diagram showing one embodiment of this invention, Fig. 2 is a block diagram showing one of the integrated circuits shown in Fig. 1, and Fig. 3 is a circuit showing the circuit shown in Fig. 2 in further detail. 4 is a circuit diagram showing the polarity control circuit shown in FIG. Figure 8 is an explanatory diagram showing an example of a stator of a multi-sensor type brushless motor.
FIG. 9 is an explanatory diagram showing an example of a rotor of a multi-sensor type brushless motor. 41, 42...Motor drive integrated circuit, L11
~L14... Stator winding, 46... Reverse control terminal, 51... Hall element, 52... High gain amplifier, 53... Polarity control circuit, 54... Output amplifier,
55...Speed control circuit.

Claims

[Claims for Utility Model Registration] (1) At least a magnetic sensor, an amplifier that amplifies the output of the magnetic sensor, and a pair of output amplification stages that amplify the differential outputs of the amplifier and supply them to the stator windings. In an integrated circuit integrated brushless motor in which a plurality of motor drive integrated circuits integrated on the same chip are arranged at predetermined positions between the stator windings, the motor drive integrated circuits are connected from the magnetic sensor to the stator windings. A polarity control means is provided in the commutation signal path leading to the pair of output amplification stages that drive the output amplifier, and a control terminal is provided for inverting the polarity of the commutation signal by the polarity control means. Integrated circuit for brushless motors. (2) The motor driving integrated circuit includes a detection means for detecting a back electromotive force induced in the stator winding, a means for converting the output of the detection means into a current, and a means for converting the output of the detection means into a current. feedback means for comparing the generated detection voltage and a reference voltage to obtain a differential voltage, and using this differential voltage to control the current value of the commutation signal; and a feedback means for externally varying the current value. 2. The integrated circuit for a brushless motor according to claim 1, wherein a terminal for adding a control voltage to the detected voltage is used as a common terminal in each of the driving integrated circuits.