JPS63113496U - - Google Patents
Info
- Publication number
- JPS63113496U JPS63113496U JP1987005011U JP501187U JPS63113496U JP S63113496 U JPS63113496 U JP S63113496U JP 1987005011 U JP1987005011 U JP 1987005011U JP 501187 U JP501187 U JP 501187U JP S63113496 U JPS63113496 U JP S63113496U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- windings
- output transistor
- comparison circuit
- collector
- 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.)
- Granted
Links
- 238000004804 winding Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は、本考案の一実施例を示す回路図、及
び第２図は従来のモータ電流検出回路を示す回路
図である。
１２，１３，１４……モータ巻線、１５，１６
，１７……駆動トランジスタ、１９，２０，２１
，２５，２６……抵抗、２２……比較回路、２３
……出力トランジスタ。
FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing a conventional motor current detection circuit. 12, 13, 14...Motor winding, 15, 16
, 17...drive transistor, 19, 20, 21
, 25, 26...Resistor, 22...Comparison circuit, 23
...Output transistor.
Claims (1)
出する電流検出回路であつて、一端が基準電位点
に共通接続され、他端がそれぞれ駆動回路に接続
された第１乃至第３巻線と、一端がそれぞれ前記
第１乃至第３巻線に接続され、他端が共通接続さ
れた第１乃至第３抵抗と、該第１乃至第３抵抗の
共通接続点に得られる電圧が一方の入力端に印加
される比較回路と、該比較回路の出力により駆動
される出力トランジスタと、該出力トランジスタ
のコレクタに得られる電圧を前記比較回路の他方
の入力端に帰還する帰還回路と、前記出力トラン
ジスタのコレクタを前記基準電位点に接続する抵
抗とから成り、前記出力トランジスタのエミツタ
にモータ巻線に流れる電流に比例する電流を得る
様にしたことを特徴とする電流検出回路。 A current detection circuit that detects the current flowing through the windings of a three-phase brushless motor, the circuit comprising first to third windings, one end of which is commonly connected to a reference potential point and the other end of which is connected to a drive circuit, respectively; are respectively connected to the first to third windings, and the other ends are commonly connected, and the voltage obtained at the common connection point of the first to third resistors is connected to one input terminal. a comparison circuit to which the voltage is applied, an output transistor driven by the output of the comparison circuit, a feedback circuit that feeds back the voltage obtained at the collector of the output transistor to the other input terminal of the comparison circuit, and a collector of the output transistor. and a resistor connected to the reference potential point, and is configured to obtain a current proportional to the current flowing through the motor windings at the emitter of the output transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987005011U JPH0640479Y2 (en) | 1987-01-16 | 1987-01-16 | Current detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987005011U JPH0640479Y2 (en) | 1987-01-16 | 1987-01-16 | Current detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63113496U true JPS63113496U (en) | 1988-07-21 |
| JPH0640479Y2 JPH0640479Y2 (en) | 1994-10-19 |
Family
ID=30786197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987005011U Expired - Lifetime JPH0640479Y2 (en) | 1987-01-16 | 1987-01-16 | Current detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0640479Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01268484A (en) * | 1988-04-15 | 1989-10-26 | Matsushita Electric Ind Co Ltd | Driver for brushless motor |
-
1987
- 1987-01-16 JP JP1987005011U patent/JPH0640479Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01268484A (en) * | 1988-04-15 | 1989-10-26 | Matsushita Electric Ind Co Ltd | Driver for brushless motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0640479Y2 (en) | 1994-10-19 |
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