JPH037697U - - Google Patents
Info
- Publication number
- JPH037697U JPH037697U JP1989068756U JP6875689U JPH037697U JP H037697 U JPH037697 U JP H037697U JP 1989068756 U JP1989068756 U JP 1989068756U JP 6875689 U JP6875689 U JP 6875689U JP H037697 U JPH037697 U JP H037697U
- Authority
- JP
- Japan
- Prior art keywords
- switching elements
- switching element
- switching
- current flowing
- current
- 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 6
- 230000003071 parasitic effect Effects 0.000 claims description 4
- 239000004065 semiconductor Substances 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 5
- 230000005669 field effect Effects 0.000 description 1
Landscapes
- Control Of Direct Current Motors (AREA)
Description
第１図は本考案の一実施例の回路図、第２図は
本考案の一実施例の動作を説明するための図、第
３図は従来の一例の回路図、第４図は従来の他の
一例の回路図である。
１，２，３，４…電界効果トランジスタ、７…
モータ、Ｒ１，Ｒ２…電流検出抵抗、Ｄ１，Ｄ２
，Ｄ３，Ｄ４…寄生ダイオード。
Fig. 1 is a circuit diagram of an embodiment of the present invention, Fig. 2 is a diagram for explaining the operation of an embodiment of the invention, Fig. 3 is a circuit diagram of a conventional example, and Fig. 4 is a circuit diagram of a conventional example. It is a circuit diagram of another example. 1, 2, 3, 4...field effect transistor, 7...
Motor, R 1 , R 2 ... Current detection resistor, D 1 , D 2
, D 3 , D 4 ...parasitic diode.
Claims (1)
ジ回路の各辺に配置され、該第１及び第３のスイ
ツチング素子の接続点と該第２及び第４のスイツ
チング素子の接続点との間にモータを接続し、該
第１及び第２のスイツチング素子の接続点と該第
３及び第４のスイツチング素子の接続点との間に
電源を接続し、該第１及び第４のスイツチング素
子を夫々オンとするか、該第２及び第３のスイツ
チング素子を夫々オンとすることにより該モータ
の回転方向を制御するモータ駆動回路において、 少なくとも前記第１及び第２のスイツチング素
子を各々半導体素子と、前記第１及び第２のスイ
ツチング素子に並列に接続され該半導体素子がオ
フの時にオン時の電流とは逆方向に電流を流す寄
生ダイオードとからなる構成とすると共に前記第
１のスイツチング素子と前記電源との間に直列に
接続され前記第１のスイツチング素子に流れる電
流に応じた電圧をその両端に発生させる第１の電
流検出抵抗と、 前記第２のスイツチング素子と前記電源との間
に直列に接続され前記第２のスイツチング素子に
流れる電流に応じた電圧をその両端に発生させる
第２の電流検出抵抗と、 前記第１の電流検出抵抗に前記電源より前記第
１のスイツチング素子方向に流れる電流によつて
生じる電圧のみを検出し前記第１のスイツチング
素子に並列に接続された前記寄生ダイオードを介
して前記第１の電流検出抵抗に流れる電流により
生じる電圧は除去する第１の半波整流回路と、 前記第２の電流検出抵抗に前記電源より前記第
２のスイツチング素子方向に流れる電流によつて
生じる電圧のみを検出し、前記第２のスイツチン
グ素子に並列に接続された前記寄生ダイオードを
介して前記第２の電流検出抵抗に流れる電流によ
り生じる電圧は除去する第２の半波整流回路とを
具備してなるモータ駆動回路。[Claims for Utility Model Registration] First to fourth switching elements are arranged on each side of a four-sided bridge circuit, and a connection point between the first and third switching elements and the second and fourth switching elements are arranged on each side of a four-side bridge circuit. A motor is connected between the connection points of the first and second switching elements, a power source is connected between the connection points of the first and second switching elements, and the connection points of the third and fourth switching elements. In a motor drive circuit that controls the rotational direction of the motor by turning on each of the fourth switching elements or turning on each of the second and third switching elements, at least the first and second switching elements The elements each include a semiconductor element and a parasitic diode which is connected in parallel to the first and second switching elements and causes a current to flow in the opposite direction to the current when the semiconductor element is on when the semiconductor element is off, and the above-mentioned a first current detection resistor that is connected in series between the first switching element and the power source and generates a voltage across it in accordance with the current flowing through the first switching element; and the second switching element. a second current detection resistor that is connected in series with the power supply and generates a voltage across the second switching element in accordance with the current flowing through the second switching element; detects only the voltage generated by the current flowing in the direction of the first switching element, and removes the voltage generated by the current flowing to the first current detection resistor via the parasitic diode connected in parallel to the first switching element. a first half-wave rectifier circuit that detects only a voltage generated by a current flowing from the power source toward the second switching element through the second current detection resistor, and a first half-wave rectifier circuit that is connected in parallel to the second switching element; a second half-wave rectifier circuit that removes a voltage generated by a current flowing to the second current detection resistor via the connected parasitic diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989068756U JPH037697U (en) | 1989-06-13 | 1989-06-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989068756U JPH037697U (en) | 1989-06-13 | 1989-06-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH037697U true JPH037697U (en) | 1991-01-24 |
Family
ID=31603464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989068756U Pending JPH037697U (en) | 1989-06-13 | 1989-06-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH037697U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61106089A (en) * | 1984-10-29 | 1986-05-24 | Seiko Instr & Electronics Ltd | Drive circuit for dc motor |
| JPS6434192A (en) * | 1987-07-27 | 1989-02-03 | Meidensha Electric Mfg Co Ltd | Controlling device for dc motor |
-
1989
- 1989-06-13 JP JP1989068756U patent/JPH037697U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61106089A (en) * | 1984-10-29 | 1986-05-24 | Seiko Instr & Electronics Ltd | Drive circuit for dc motor |
| JPS6434192A (en) * | 1987-07-27 | 1989-02-03 | Meidensha Electric Mfg Co Ltd | Controlling device for dc motor |
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