JPS5918591U

JPS5918591U - 3-phase DC brushless motor drive circuit

Info

Publication number: JPS5918591U
Application number: JP1982111812U
Authority: JP
Inventors: 秀夫高橋
Original assignee: 日本電気株式会社
Priority date: 1982-07-23
Filing date: 1982-07-23
Publication date: 1984-02-04

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図はホールモータの原理を説明するためのホール素
子およびモータロータの斜視図、第２図は第１図のロー
タの磁極位置とホール素子の出力の関係を示す波形図、
第３図は従来の３相直流ブラシレスモ一タ駆動回路のブ
ロック回路図、第４図は本考案の一実施例のブロック回
路図、第５図ａ　”−ｃは第４図回路の回路動作を説明
するための動作波形図である。１・・・・・・ホール素子、２・・・・・・ロータ、３
ａ、　　３ｂ。３Ｃ，１２・・・・・・差動アンプ、６・・・・・・プ
リドライバ、７・・・・・・パワードライバ、８．１８
・・・・・・モータ、１１・・・・・・パルス出力回路
、１３・・・・・・バッファ、１４・・・・・・位相制
御信号発生回路、１５・・・・・・カウンタ、１６・・
・・・・１／３分割回路、１７・・・・・・２／３分割
回路、１９・・・・・・グロックパルス発生回路、２１
・・・・・・１　／３Ｔ遅延回路、２２・・・・・・２
／３Ｔ遅延回路。Fig. 1 is a perspective view of a Hall element and motor rotor for explaining the principle of a Hall motor, Fig. 2 is a waveform diagram showing the relationship between the magnetic pole position of the rotor and the output of the Hall element in Fig. 1;
Fig. 3 is a block circuit diagram of a conventional three-phase DC brushless motor drive circuit, Fig. 4 is a block circuit diagram of an embodiment of the present invention, and Fig. 5 a''-c shows the circuit operation of the circuit shown in Fig. 4. It is an operation waveform diagram for explaining. 1... Hall element, 2... Rotor, 3
a, 3b. 3C, 12... Differential amplifier, 6... Pre-driver, 7... Power driver, 8.18
...Motor, 11...Pulse output circuit, 13...Buffer, 14...Phase control signal generation circuit, 15...Counter, 16...
...1/3 dividing circuit, 17...2/3 dividing circuit, 19... Glock pulse generation circuit, 21
......1 /3T delay circuit, 22...2
/3T delay circuit.

Claims

[Scope of utility model registration request]

A Hall element for rotor rotational position detection, a pulse output circuit that receives the output of this Hall element as input and outputs a pulse, a clock pulse generation circuit that generates a clock pulse, and an output pulse (original) of the pulse output circuit. When the number of clock pulses during - period T of the output pulse is N, 113N and 273N are obtained, and 1/3T and 2/3T times obtained by multiplying the 173N and 273N by the period of the previous clock pulse, respectively. a phase control signal generation circuit for obtaining a phase control signal for delaying the phase of the original output pulse by 1/3T and 2/3T for delaying the phase of the original output pulse by the output signal of the phase control signal generation circuit; The motor is characterized by comprising a 3T delay circuit, and an amplifier circuit that amplifies the original output pulse and the respective output pulses of the 1/3T delay circuit and the 2/3T delay circuit and supplies winding current to the motor windings. 3-phase DC brushless motor drive circuit.