JPS63153796U - - Google Patents
Info
- Publication number
- JPS63153796U JPS63153796U JP1987042021U JP4202187U JPS63153796U JP S63153796 U JPS63153796 U JP S63153796U JP 1987042021 U JP1987042021 U JP 1987042021U JP 4202187 U JP4202187 U JP 4202187U JP S63153796 U JPS63153796 U JP S63153796U
- Authority
- JP
- Japan
- Prior art keywords
- obtaining
- edge
- output
- detection
- exclusive
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 7
- 238000003708 edge detection Methods 0.000 claims description 4
- 238000009499 grossing Methods 0.000 claims description 2
- 230000003111 delayed effect Effects 0.000 claims 1
- 230000005405 multipole Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Description
第１図は本考案の一実施例によるＤＣブラシレ
スモータの回転速度検出回路の構成を示すブロツ
ク図、第２図は第１図の各部の波形例を示した波
形図、第３図は本考案の適用されるＤＣブラシレ
スモータの一構成例を示す平面図、第４図は従来
のＤＣブラシレスモータの回転速度検出回路の構
成を示すブロツク図、第５図は第４図の各部の波
形例を示した波形図である。
１Ａ，１Ｂ，１Ｃ……増幅器、２……エツジ検
出回路、３……遅延回路、４……排他的オア回路
、５……平滑回路。
FIG. 1 is a block diagram showing the configuration of a rotational speed detection circuit for a DC brushless motor according to an embodiment of the present invention, FIG. 2 is a waveform diagram showing waveform examples of each part of FIG. FIG. 4 is a block diagram showing the configuration of a rotational speed detection circuit of a conventional DC brushless motor, and FIG. 5 shows an example of waveforms of each part of FIG. 4. FIG. 1A, 1B, 1C...Amplifier, 2...Edge detection circuit, 3...Delay circuit, 4...Exclusive OR circuit, 5...Smoothing circuit.
Claims (1)
を複数の磁気検出素子により検出し、該検出出力
により複数の界磁コイルに流す電流を切換えてモ
ータの回転駆動力を発生させるＤＣブラシレスモ
ータにおいて、前記複数の磁気検出素子のうち少
なくとも２つの磁気検出素子の検出出力をそれぞ
れ増幅して前記ローターマグネツトの極性に対応
した少なくとも２つの矩形波出力を得る増幅手段
と、前記少なくとも２つの矩形波出力のエツジを
検出し、エツジ検出毎に極性を反転したエツジ検
出出力を得るエツジ検出手段と、前記エツジ検出
出力を一定時間遅延した遅延出力を得る遅延手段
と、前記エツジ検出出力と前記遅延出力との排他
的オアをとつて排他的オア出力を得る排他的オア
手段と、前記排他的オア出力を平滑して、前記Ｄ
Ｃブラシレスモータの回転速度に対応した直流電
圧を得る平滑手段とを有するＤＣブラシレスモー
タの回転速度検出回路。 In a DC brushless motor, the rotational position of a multi-pole magnetized rotor magnet is detected by a plurality of magnetic detection elements, and the current flowing through a plurality of field coils is switched based on the detection output to generate rotational driving force of the motor. an amplifying means for respectively amplifying the detection outputs of at least two of the plurality of magnetic detection elements to obtain at least two rectangular wave outputs corresponding to the polarities of the rotor magnet; and the at least two rectangular wave outputs. edge detection means for detecting an edge of and obtaining an edge detection output with the polarity inverted each time an edge is detected; a delay means for obtaining a delayed output by delaying the edge detection output by a certain period of time; an exclusive OR means for obtaining an exclusive OR output by taking the exclusive OR of D;
A rotational speed detection circuit for a DC brushless motor, comprising smoothing means for obtaining a DC voltage corresponding to the rotational speed of the brushless motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987042021U JPS63153796U (en) | 1987-03-24 | 1987-03-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987042021U JPS63153796U (en) | 1987-03-24 | 1987-03-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63153796U true JPS63153796U (en) | 1988-10-07 |
Family
ID=30857550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987042021U Pending JPS63153796U (en) | 1987-03-24 | 1987-03-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63153796U (en) |
-
1987
- 1987-03-24 JP JP1987042021U patent/JPS63153796U/ja active Pending
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