JPH0196792U - - Google Patents
Info
- Publication number
- JPH0196792U JPH0196792U JP1987192059U JP19205987U JPH0196792U JP H0196792 U JPH0196792 U JP H0196792U JP 1987192059 U JP1987192059 U JP 1987192059U JP 19205987 U JP19205987 U JP 19205987U JP H0196792 U JPH0196792 U JP H0196792U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- voltage
- frequency
- differential amplifier
- rotational speed
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Control Of Electric Motors In General (AREA)
Description
第１図は、本考案のモータの制御回路の一実施
例のブロツク系統図、第２図は、第１図を説明す
るための波形図、第３図は従来のモータの制御回
路のブロツク系統図、第４図は、第２図を説明す
るための波形図である。
１……モータ、２……回転速度検出部、３……
増幅器、４……周波数電圧変換回路、５……スイ
ツチ、６……第１の差動増幅器、７……ＮＰＮト
ランジスタ、８……反転回路、９〜１２，１４，
１５……入力端子、１３……カウンタ、１６……
周波数比較回路、１７……Ｄ／Ａ変換回路、１８
……第２の差動増幅器、ＶＲ……基準電圧、Ｖｓ
……第１の基準電圧、Ｖｓ′……第２の基準電圧
。
Fig. 1 is a block system diagram of an embodiment of the motor control circuit of the present invention, Fig. 2 is a waveform diagram for explaining Fig. 1, and Fig. 3 is a block system diagram of a conventional motor control circuit. 4 are waveform diagrams for explaining FIG. 2. 1...Motor, 2...Rotation speed detection unit, 3...
Amplifier, 4... Frequency-voltage conversion circuit, 5... Switch, 6... First differential amplifier, 7... NPN transistor, 8... Inverting circuit, 9-12, 14,
15...Input terminal, 13...Counter, 16...
Frequency comparison circuit, 17...D/A conversion circuit, 18
...Second differential amplifier, VR...Reference voltage, Vs
...First reference voltage, Vs'...Second reference voltage.
Claims (1)
回転速度検出部と、この回転速度検出部の出力信
号を電圧に変換する周波数電圧変換回路と、この
周波数電圧変換回路の出力電圧を第１の基準電圧
と比較する第１の差動増幅回路と、この第１の差
動増幅回路出力信号により、モータの速度制御を
する回路とを備えたモータの制御回路において、
前記回転速度検出部が送出する周波数信号を計数
するカウンタと、このカウンタの計数値と所定値
とを比較する周波数比較回路と、この周波数比較
回路の出力信号をアナログ信号に変換するＤ／Ａ
変換回路と、このＤ／Ａ変換回路の出力信号と第
２の基準電圧とを比較して、直流電圧を送出する
第２の差動増幅回路とを備え、この第２の差動増
幅回路出力信号が前記第１の差動増幅回路電源電
圧としたことを特徴とするモータの制御回路。 A rotational speed detection section that detects the rotational speed of the motor as a frequency signal, a frequency-voltage conversion circuit that converts the output signal of the rotational speed detection section into a voltage, and an output voltage of the frequency-voltage conversion circuit as a first reference voltage. A motor control circuit comprising a first differential amplifier circuit for comparison and a circuit for controlling the speed of the motor based on the first differential amplifier circuit output signal,
A counter that counts the frequency signal sent out by the rotational speed detection section, a frequency comparison circuit that compares the counted value of this counter with a predetermined value, and a D/A that converts the output signal of this frequency comparison circuit into an analog signal.
a conversion circuit; and a second differential amplifier circuit that compares the output signal of the D/A conversion circuit with a second reference voltage and sends out a DC voltage; A motor control circuit characterized in that the signal is a power supply voltage of the first differential amplifier circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987192059U JPH0196792U (en) | 1987-12-18 | 1987-12-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987192059U JPH0196792U (en) | 1987-12-18 | 1987-12-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0196792U true JPH0196792U (en) | 1989-06-27 |
Family
ID=31482935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987192059U Pending JPH0196792U (en) | 1987-12-18 | 1987-12-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0196792U (en) |
-
1987
- 1987-12-18 JP JP1987192059U patent/JPH0196792U/ja active Pending