JPH02174591A - Holding-current control circuit - Google Patents
Holding-current control circuitInfo
- Publication number
- JPH02174591A JPH02174591A JP63330409A JP33040988A JPH02174591A JP H02174591 A JPH02174591 A JP H02174591A JP 63330409 A JP63330409 A JP 63330409A JP 33040988 A JP33040988 A JP 33040988A JP H02174591 A JPH02174591 A JP H02174591A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- motor
- switching power
- pulse
- circuit
- 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
- 238000012935 Averaging Methods 0.000 claims abstract description 4
- 238000003079 width control Methods 0.000 claims abstract description 3
- 238000001514 detection method Methods 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims 2
- 230000020169 heat generation Effects 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 101100444285 Arabidopsis thaliana DYAD gene Proteins 0.000 description 1
- 101150016929 SWI1 gene Proteins 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
Landscapes
- Control Of Direct Current Motors (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、保持電流の制御回路、特に、スイッチング電
源によ’７ＤＣ電力を供給されるＤＣモータの保持電流
を制御するためにスイッチング電源のスイッチングパル
ス幅を制御する保持電流制御回路に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a holding current control circuit, particularly a switching power supply control circuit for controlling the holding current of a DC motor supplied with DC power by a switching power supply. The present invention relates to a holding current control circuit that controls switching pulse width.
従来の保持電流制御回路は、その保持すべき時間の間は
、抵抗器を用いて電流を一定としたり、ＤＣモータの駆
動を制御する能動素子を定電流動作させたり、パルス制
御させたりすることにより一定の電流を得ていた。Conventional holding current control circuits use resistors to keep the current constant during the holding time, operate active elements that control the drive of the DC motor at constant current, or perform pulse control. A constant current was obtained.
しかしながら、このような上述した従来の保持電流制御
回路は、抵抗器や定電流回路を用いるため発熱が大きく
なるとともに、パルス制御してもそのパルスのＯＮ、Ｏ
ＦＦ時に発熱するという欠点があった。However, the above-mentioned conventional holding current control circuit uses a resistor and a constant current circuit, so it generates a large amount of heat, and even if pulse control is performed, the pulse ON/O
It had the disadvantage of generating heat during FF operation.
本発明の保持電流制御回路は、保持電流を印加すべき状
態を受信すると、スイッチング電源の誤差検出回路と出
力回路を同時に切替える連動切替スイッチを有して構成
される。The holding current control circuit of the present invention includes an interlocking changeover switch that simultaneously switches the error detection circuit and the output circuit of the switching power supply when a state in which a holding current should be applied is received.
次に、本発明の実施例について、図面を参照して説明す
る。Next, embodiments of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例を示す回路図である。FIG. 1 is a circuit diagram showing one embodiment of the present invention.
第１図に示すように保持電流制御回路は、−点鎖線で示
すスイッチング電源回路ＳＷを含んでおり、連動切替ス
イッチＳＷＩ １．ＳＷＩ ２が鎖線内でショートされ
ている状態でスイッチング電源として機能する。As shown in FIG. 1, the holding current control circuit includes a switching power supply circuit SW shown by a dashed-dotted line, and includes an interlocking changeover switch SWI1. It functions as a switching power supply when SWI 2 is shorted within the dashed line.
この保持電流制御回路に保持すべき状態であることを示
す保持指示信号ＨＯＬＤが供給されると、ＤＣモータを
駆動するための駆動用トランジスタＱ１がＯＮされ、ま
た、保持回転切替回路５により、連動切替スイッチ５Ｗ
１１は端子１ｃが１ｂに、連動切替スイッチ５Ｗ１２は
端子２ｃと２ｂに各々接続される。When the holding instruction signal HOLD indicating that the holding current control circuit is in a state to be held is supplied, the driving transistor Q1 for driving the DC motor is turned on, and the holding rotation switching circuit 5 causes the interlocking Changeover switch 5W
11, the terminal 1c is connected to 1b, and the interlocking changeover switch 5W12 is connected to terminals 2c and 2b, respectively.
保持状態となると、スイッチング電源ＳＷのパルス電力
は連動切替スイッチ５Ｗ１１を通して直接ＤＣモータＭ
ｌに印加される。このパルス電力の値は、駆動用トラン
ジスタＱ１のエミッタに接続されたモータ電流検出抵抗
Ｒ１により検出され、平均値化回路４および電圧増幅器
３を経由して連動切替スイッチ５Ｗ１２を通してスイッ
チング電源ＳＷの誤差増幅器２に入力され、基準電圧■
、。、と比較されて電圧増幅された値と基準電圧■、。When the holding state is reached, the pulse power of the switching power supply SW is directly connected to the DC motor M through the interlocking changeover switch 5W11.
applied to l. The value of this pulsed power is detected by the motor current detection resistor R1 connected to the emitter of the driving transistor Q1, and is passed through the averaging circuit 4 and voltage amplifier 3 to the interlocking changeover switch 5W12 to the error amplifier of the switching power supply SW. 2, the reference voltage ■
,. , the voltage is compared with the amplified value and the reference voltage ■,.
、が同じになるようにスイッチング電源ＳＷのパルス幅
が制御されて初期の保持電流値を一定に保つ。The pulse width of the switching power supply SW is controlled so that , are the same, and the initial holding current value is kept constant.
本発明の保持電流制御回路は、ＤＣモータの保持電流制
御をスイッチング電源のパルス幅制御で行ない、スイッ
チング電源内に発熱を留めることができるため、ＤＣモ
ータの駆動回路での発熱を防止できるため、駆動回路の
実装の自由度が増え、実装容積を小さくできるという効
果かあ、る。The holding current control circuit of the present invention controls the holding current of the DC motor by controlling the pulse width of the switching power supply, and can prevent heat generation in the drive circuit of the DC motor because heat generation can be contained within the switching power supply. This has the effect of increasing the degree of freedom in mounting the drive circuit and reducing the mounting volume.
第１図は本発明の一実施例を示す回路図である。
１・・・・・・パルス幅制御回路、２・・・・・・誤差
増幅器、３・・・・・・電圧増幅器、４・・・・・・平
均値化回路、５・・・・保持回転切替回路、
ＳＷ・・・・・・スイッチング電源、５ＷＴＩ・・・・
・・出カドランス、５ＷＤＩ・・・・・・出力整流ダイ
オード、５ＷＲＩ、５ＷＲ２・・・・・・出力検出分圧
抵抗、５ＷＣ１・・・・・・出力平滑コンデンサ、５Ｗ
Ｑ１・・・・・・スイッチング能動素子、ＳＷＩ １．
ＳＷＩ ２・・・・・・連動切替スイッチ、ｌａ、ｌｂ
、ｌｃ、２ａ、２ｂ。
２ｃ・・・・・・端子、Ｄｌ・・・・・・逆電流阻止ダ
イオード、Ｄ２・・・・・・逆電圧防止ダイオード、Ｍ
ｌ・・・・・・ＤＣモータ、Ｑｌ・・・・・・駆動用ト
ランジスタ、Ｒ１・・・・・・モータ電流検出抵抗、
ＨＯＬＤ・・・・・・保持指示信号、Ｖｒａｔ・・・・
・・基準電圧。
代理人 弁理士 内 原 晋
一FIG. 1 is a circuit diagram showing an embodiment of the present invention. 1...Pulse width control circuit, 2...Error amplifier, 3...Voltage amplifier, 4...Averaging circuit, 5...Holding Rotation switching circuit, SW...Switching power supply, 5WTI...
... Output transformer, 5WDI ... Output rectifier diode, 5WRI, 5WR2 ... Output detection dividing resistor, 5WC1 ... Output smoothing capacitor, 5W
Q1...Switching active element, SWI 1.
SWI 2・・・・・・Interlocked changeover switch, la, lb
, lc, 2a, 2b. 2c... terminal, Dl... reverse current blocking diode, D2... reverse voltage blocking diode, M
l...DC motor, Ql...drive transistor, R1...motor current detection resistor, HOLD...holding instruction signal, Vrat...
...Reference voltage. Agent Patent Attorney Shinichi Uchihara
Claims (1)
と、前記スイッチング電源によりＤＣ電力が供給される
巻線を持つＤＣモータを含む出力回路と、前記ＤＣモー
タの電流を保持すべき状態では前記スイッチング電源の
前記誤差検出回路と前記出力回路を切替えるための連動
スイッチと、前記ＤＣモータの電流値を前記誤差検出回
路に入力し前記スイッチング電源のパルス電力を前記Ｄ
Ｃモータの巻線に印加するための平均値化回路とを含む
ことを特徴とする保持電流制御回路。a switching power supply including an error detector and a pulse width control circuit; an output circuit including a DC motor having a winding to which DC power is supplied by the switching power supply; and in a state where the current of the DC motor is to be maintained, the switching power supply an interlocking switch for switching between the error detection circuit and the output circuit; and inputting the current value of the DC motor to the error detection circuit and supplying the pulse power of the switching power supply to the D
A holding current control circuit comprising: an averaging circuit for applying voltage to a winding of a C motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63330409A JPH02174591A (en) | 1988-12-26 | 1988-12-26 | Holding-current control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63330409A JPH02174591A (en) | 1988-12-26 | 1988-12-26 | Holding-current control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02174591A true JPH02174591A (en) | 1990-07-05 |
Family
ID=18232278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63330409A Pending JPH02174591A (en) | 1988-12-26 | 1988-12-26 | Holding-current control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02174591A (en) |
-
1988
- 1988-12-26 JP JP63330409A patent/JPH02174591A/en active Pending
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