JPH0669304B2 - Motor control device - Google Patents
Motor control deviceInfo
- Publication number
- JPH0669304B2 JPH0669304B2 JP59122354A JP12235484A JPH0669304B2 JP H0669304 B2 JPH0669304 B2 JP H0669304B2 JP 59122354 A JP59122354 A JP 59122354A JP 12235484 A JP12235484 A JP 12235484A JP H0669304 B2 JPH0669304 B2 JP H0669304B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- motor
- voltage
- output
- sawtooth
- 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.)
- Expired - Lifetime
Links
- 238000007493 shaping process Methods 0.000 claims description 22
- 238000005070 sampling Methods 0.000 claims 1
- 239000004065 semiconductor Substances 0.000 description 8
- 238000001514 detection method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
- H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
- H02P7/29—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation
- H02P7/2913—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Direct Current Motors (AREA)
Description
【発明の詳細な説明】 ［技術分野］ 本発明は、小形電気機器に使用する直流モータの制御装
置に関するものである。TECHNICAL FIELD The present invention relates to a control device for a DC motor used in a small electric device.
［背景技術］ 通常この種のモータの過負荷を検出する手段としては、
モータの温度上昇をチェックする方法が一般的である。
しかし最近ではモータの制御用に半導体素子が使用され
ることが多く、温度が上昇する前に過電流が流れてスイ
ッチング素子が破壊するおそれがある。またモータの過
負荷を過電流によって検出する方法は、電流検出用抵抗
値のばらつき、モータの特性のばらつき、あるいは電池
の残容量の違いなどのために制御のかかる回転数が変動
し易いという問題がある。BACKGROUND ART Usually, as a means for detecting an overload of this type of motor,
A general method is to check the temperature rise of the motor.
However, recently, a semiconductor element is often used for controlling a motor, and an overcurrent may flow before the temperature rises, which may damage the switching element. Further, the method of detecting the overload of the motor by the overcurrent has a problem that the number of revolutions to be controlled is likely to change due to variations in resistance value for current detection, variations in characteristics of the motor, or differences in remaining battery capacity. There is.
そこで、回転軸に連結した周波数発生器の第５図（イ）
に示す出力を変換して同図（ロ）に示すパルス波形にす
る波形整形回路と、上記パルスをタイミング信号として
同図（ハ）に示す鋸歯状波を発生する鋸歯状波発生回路
と、上記鋸歯状波電圧を基準電圧と比較し、その出力で
モータ給電回路に挿入されたスイッチング素子を制御し
て過負荷時にモータへの給電を遮断する鋸歯状波電圧比
較回路を設けたものがある。第５図（ニ）に鋸歯状波電
圧比較回路の出力を示す。Therefore, Fig. 5 (a) of the frequency generator connected to the rotating shaft
A waveform shaping circuit for converting the output shown in Fig. 4 into a pulse waveform shown in Fig. 2B, a sawtooth wave generation circuit for generating the sawtooth wave shown in Fig. 5C using the pulse as a timing signal, There is a device provided with a sawtooth voltage comparison circuit that compares the sawtooth voltage with a reference voltage and controls the switching element inserted in the motor power feeding circuit by its output to shut off the power feeding to the motor when overloaded. FIG. 5D shows the output of the sawtooth wave voltage comparison circuit.
このモータ制御装置によれば、モータの過負荷状態を回
転数で検出して、温度が上昇する前にモータへの給電を
遮断し、モータおよび半導体スイッチング素子を保護す
ることができる。According to this motor control device, it is possible to detect the overload state of the motor by the number of rotations, cut off the power supply to the motor before the temperature rises, and protect the motor and the semiconductor switching element.
しかしながら、この種のモータ制御装置では次のような
問題がある。つまり、上記モータ制御装置においてt1時
点で過負荷を検出してモータを停止させると、モータを
収納している機器本体が反動でモータ回転方向と反対方
向に回転してしまう。このため、第５図（イ）の右側に
示すように、周波数発生器にモータの回転時と同様の出
力が発生し、これにより同図（ロ），（ハ）に示すよう
に波形整形回路及び鋸歯状波発生回路からモータの回転
時と同様の出力が発生し、鋸歯状波電圧比較回路の出力
が同図（ニ）に示すようにリセットされてしまう。この
ときには、半導体スイッチング素子がオンとなり、モー
タへの給電が行われるため、過負荷時のモータおよび半
導体スイッチング素子の保護機能が正常に働かない。However, this type of motor control device has the following problems. In other words, if the motor control device detects an overload at time t 1 and stops the motor, the device body that houses the motor recoils and rotates in the direction opposite to the motor rotation direction. Therefore, as shown on the right side of FIG. 5 (a), an output similar to that at the time of rotation of the motor is generated in the frequency generator, which causes the waveform shaping circuit as shown in (b) and (c) of FIG. Also, the same output as when the motor is rotated is generated from the sawtooth wave generation circuit, and the output of the sawtooth wave voltage comparison circuit is reset as shown in FIG. At this time, the semiconductor switching element is turned on and power is supplied to the motor, so that the protective function of the motor and the semiconductor switching element at the time of overload does not operate normally.
［発明の目的］ 本発明は上述の点に鑑みて為されたものであり、その目
的とするところは、モータの過負荷状態を回転数で検出
して、モータへの給電を遮断してモータおよび半導体ス
イッチング素子の保護を図るモータ制御装置を、モータ
を収納した機器本体がモータの停止時に反動でモータ回
転方向と反対方向に回転しても、モータへの給電を遮断
した状態に保つことができるようにすることにある。[Object of the Invention] The present invention has been made in view of the above-mentioned points, and an object of the present invention is to detect an overload state of a motor by the number of revolutions and cut off power supply to the motor. Also, the motor control device that protects the semiconductor switching element can keep the power supply to the motor cut off even if the device housing the motor rotates in a direction opposite to the motor rotation direction due to reaction when the motor stops. To be able to do it.
［発明の開示］ 本発明によるモータ制御装置は、回転軸に連結した周波
数発生器の出力を変換してパルス波形にする波形整形回
路と、上記パルスをタイミング信号として鋸歯状波を発
生する鋸歯状波発生回路と、上記鋸歯状波電圧を基準電
圧と比較し、その出力でモータ給電回路に挿入されたス
イッチング素子を制御して過負荷時にモータへの給電を
遮断する鋸歯状波電圧比較回路を備えることにより、モ
ータの過負荷状態を回転数で検出して、温度が上昇する
前にモータへの給電を遮断し、モータおよび半導体スイ
ッチング素子を保護する。そして、過負荷を検出してモ
ータを停止したとき、モータを収納した機器本体が反動
でモータ回転方向と反対方向に回転しても、鋸歯状波電
圧比較回路の出力がリセットされることがないように構
成してある。つまり、本発明のモータ制御装置では、上
記波形整形回路を、周波数発生器の出力にバイアス電圧
を重畳して脈流とするレベルシフト回路と、この脈流電
圧を上記バイアス電圧よりも若干低い基準電圧と比較す
る脈流電圧比較回路と、この脈流電圧比較回路の出力を
整形する整形回路とで構成してある。これにより、上記
レベルシフト回路で周波数発生器の出力に重畳するバイ
アス電圧を、モータ停止時の反動による回転程度では波
形整形回路の出力がリセットされることがないように設
定し、反動で機器本体がモータ回転方向と反対方向に回
転しても、鋸歯状波電圧比較回路の出力がリセットされ
ないようにし、モータへの給電を遮断した状態に保つ。DISCLOSURE OF THE INVENTION A motor control device according to the present invention includes a waveform shaping circuit that converts an output of a frequency generator connected to a rotary shaft into a pulse waveform, and a sawtooth waveform that generates a sawtooth waveform using the pulse as a timing signal. A wave generation circuit and a sawtooth voltage comparison circuit that compares the sawtooth voltage with a reference voltage and controls the switching element inserted in the motor power feeding circuit with its output to cut off the power feeding to the motor when overloaded. With the provision, the overload state of the motor is detected by the number of rotations, the power supply to the motor is cut off before the temperature rises, and the motor and the semiconductor switching element are protected. When the overload is detected and the motor is stopped, the output of the sawtooth wave voltage comparison circuit is not reset even if the device body housing the motor recoils and rotates in the direction opposite to the motor rotation direction. It is configured as follows. That is, in the motor control device of the present invention, the waveform shaping circuit is a level shift circuit that superimposes a bias voltage on the output of the frequency generator to generate a pulsating current, and the pulsating current voltage is a reference value that is slightly lower than the bias voltage. It is composed of a pulsating voltage comparison circuit for comparing with the voltage and a shaping circuit for shaping the output of the pulsating voltage comparison circuit. As a result, the bias voltage superimposed on the output of the frequency generator in the level shift circuit is set so that the output of the waveform shaping circuit is not reset by the rotation caused by the reaction when the motor is stopped. Even if the motor rotates in the direction opposite to the motor rotation direction, the output of the sawtooth wave voltage comparison circuit is not reset and the power supply to the motor is cut off.
第１図は本発明装置の一実施例を示したものである。同
図において、１はモータＭの回転軸に連結された周波数
発生器で、永久磁石回転子とホール素子あるいはコイル
などよりなる固定子とで構成されている。周波数発生器
１の出力は第３図の（イ）に示すようにほぼ正弦波とな
っており、次段のレベルシフト回路２でこの正弦波の振
幅よりも若干大きなバイアス電圧Vdcが重畳される。し
たがってレベルシフト回路２の出力信号は同図（ロ）に
示すように直流レベルが振幅値よりもやや高い脈流とな
る。この脈流電圧が次段の脈流電圧比較回路３で基準電
圧Vf1と比較され、比較回路３の出力が整形回路４で整
形されて（ハ）に示すようなパルスを得る。すなわちレ
ベルシフト回路２、脈流電圧比較回路３および整形回路
４により波形整形回路５を構成しているのである。６は
鋸歯状波発生回路で、上記パルス信号の立上りをタイミ
ングとして充放電を行なう時定数回路で構成され、この
鋸歯状波のピーク値が上記タイミングパルスでサンプル
ホールド回路７に保持される。サンプルホールド回路７
の出力は直流増幅回路８でレベルで調整された後、三角
波電圧比較回路10で基準三角波発生回路９の出力と比較
され、この比較回路10の出力によって制御されるスイッ
チング素子11によってモータＭの電源をオンオフするこ
とにより、モータの速度制御を行なっている。すなわち
モータの速度が低下するとタイミングパルスの時間間隔
が長くなるので、鋸歯状波のピーク値が高くなってサン
プルホールド回路７の保持電圧が高くなり、その結果比
較回路10の出力信号のパルス幅が大きくなってモータへ
の供給電流が増加するのである。上述の鋸歯状波発生回
路６の出力は、鋸歯状波電圧比較回路12および起動時作
動遅延回路13よりなる過負荷検出回路14にも入力され、
鋸歯状波電圧のピーク値が基準電圧と比較される。モー
タ回転数が一定値よりも低下すると過負荷検出回路14の
出力により上記スイッチング素子11をオフにし、モータ
への給電を遮断する。FIG. 1 shows an embodiment of the device of the present invention. In the figure, reference numeral 1 is a frequency generator connected to the rotation shaft of the motor M, and is composed of a permanent magnet rotor and a stator composed of a Hall element or a coil. The output of the frequency generator 1 is almost a sine wave as shown in (a) of FIG. 3, and the bias voltage Vdc slightly larger than the amplitude of this sine wave is superimposed in the level shift circuit 2 of the next stage. . Therefore, the output signal of the level shift circuit 2 has a pulsating flow whose DC level is slightly higher than its amplitude value, as shown in FIG. This pulsating current voltage is compared with the reference voltage Vf 1 by the pulsating current voltage comparing circuit 3 at the next stage, and the output of the comparing circuit 3 is shaped by the shaping circuit 4 to obtain a pulse as shown in (c). That is, the level shift circuit 2, the pulsating current voltage comparison circuit 3 and the shaping circuit 4 constitute the waveform shaping circuit 5. Reference numeral 6 denotes a sawtooth wave generation circuit, which is composed of a time constant circuit for charging and discharging at the rising edge of the pulse signal as a timing. The peak value of the sawtooth wave is held in the sample hold circuit 7 at the timing pulse. Sample and hold circuit 7
After being adjusted in level by the DC amplification circuit 8, the output of is compared with the output of the reference triangular wave generation circuit 9 by the triangular wave voltage comparison circuit 10, and the power supply of the motor M is controlled by the switching element 11 controlled by the output of this comparison circuit 10. The motor speed is controlled by turning on and off. That is, since the time interval of the timing pulse becomes longer as the motor speed decreases, the peak value of the sawtooth wave becomes higher and the holding voltage of the sample hold circuit 7 becomes higher. As a result, the pulse width of the output signal of the comparison circuit 10 becomes larger. As the size increases, the current supplied to the motor increases. The output of the sawtooth wave generation circuit 6 is also input to the overload detection circuit 14 including the sawtooth wave voltage comparison circuit 12 and the activation delay circuit 13.
The peak value of the sawtooth wave voltage is compared with the reference voltage. When the motor rotation speed falls below a certain value, the switching element 11 is turned off by the output of the overload detection circuit 14 to cut off the power supply to the motor.
第２図は第１図の装置の具体回路を示したものである。
同図において、モータ速度制御IC15は第１図における脈
流電圧比較回路３、整形回路４、鋸歯状波発生回路６、
サンプルホールド回路７および直流増幅回路８を含んで
おり、モータ速度制御IC15から出力された鋸歯状波信号
が過負荷検出回路14の鋸歯状波電圧比較回路12に印加さ
れている。いま第４図（イ）に示すように、モータの回
転数が落ち、周波数発生器１の出力の周期が長くなって
くると、（ハ）のパルス幅も長くなり、そのために
（ニ）に示すように鋸歯状波のピーク値が大きくなる。
このピーク値が抵抗Rk1およびRk2で決定される基準電圧
Vf2を超えると、（ホ）に示すように鋸歯状波電圧比較
回路12から過負荷検出信号が出力されて、トランジスタ
Q3をオンすることによりスイッチング素子11をオフにし
モータを停止させる。第４図のt1時点で一旦モータが停
止すると、図示のように周波数発生器１の出力はゼロと
なるが、前述のようにバイアス電圧Vdcの方が脈流電圧
比較回路３の基準電圧Vf1よりも若干高く設定されてい
るので、波形整形回路５の出力がt1時点以降はＨレベル
にクランプされ、したがって鋸歯状波のピーク値は時定
数回路CtRtによって電源電圧Vcまで上昇しクランプさ
れ、それによってモータが再スタートするのを防止して
いる。FIG. 2 shows a specific circuit of the device shown in FIG.
In the figure, the motor speed control IC 15 is a pulsating current voltage comparison circuit 3, a shaping circuit 4, a sawtooth wave generation circuit 6 in FIG.
The saw-tooth wave signal output from the motor speed control IC 15 is applied to the saw-tooth wave voltage comparison circuit 12 of the overload detection circuit 14 including the sample hold circuit 7 and the DC amplification circuit 8. As shown in FIG. 4 (a), when the rotation speed of the motor decreases and the output cycle of the frequency generator 1 becomes longer, the pulse width of (c) also becomes longer. As shown, the peak value of the sawtooth wave increases.
This peak value is the reference voltage determined by resistors Rk 1 and Rk 2.
When Vf 2 is exceeded, the sawtooth voltage comparison circuit 12 outputs an overload detection signal as shown in (e),
Turning on Q 3 turns off switching element 11 and stops the motor. Once the motor stops at time t 1 in FIG. 4, the output of the frequency generator 1 becomes zero as shown, but as described above, the bias voltage Vdc is the reference voltage Vf of the pulsating current voltage comparison circuit 3. Since it is set to be slightly higher than 1, the output of the waveform shaping circuit 5 is clamped to the H level after the time point t 1 , and therefore the peak value of the sawtooth wave is raised to the power supply voltage Vc by the time constant circuit CtRt and clamped. , Which prevents the motor from restarting.
また、バイアス電圧Vdcは、過負荷を検出してモータＭ
を停止したとき、モータＭを収納した機器本体が反動で
モータＭの回転方向と反対方向に回転しても、鋸歯状波
電圧比較回路12の出力がリセットされないように設定し
てある。このため、モータＭの停止時の反動による回転
程度では、モータＭへの給電が再開されず、過負荷時の
モータおよび半導体スイッチング素子の保護機能を正常
に働かせることができる。In addition, the bias voltage Vdc detects the overload and detects the motor M
Is set so that the output of the sawtooth wave voltage comparison circuit 12 is not reset even if the device body housing the motor M rotates in the opposite direction to the rotation direction of the motor M when the motor M is stopped. For this reason, the power supply to the motor M is not restarted by the rotation due to the reaction when the motor M is stopped, and the protection function of the motor and the semiconductor switching element at the time of overload can be normally operated.
またモータ起動初期においては、起動時作動遅延回路13
の時定数回路CsRsがトランジスタQ4をオン状態に保つこ
とにより、鋸歯状波電圧が比較回路12に入力されるのを
阻止し、過負荷検出回路14の作動開始を遅らせている。
なお16は直流増幅回路８のゲインを調整する回路で、こ
れによってモータＭの速度を調整するものである。17は
各回路へ電源電圧Vcを供給する定電圧回路であり、この
定電圧回路17の電源はモータＭの電池電源Vbを共用して
いる。電圧Vcが低下すると抵抗Rb1およびRb2による分圧
電圧とトランジスタQ5のベースエミッタ間電圧との和が
ツェナーダイオードDzと発光ダイオードLEDの電圧の和
よりも低くなり、トランジスタQ6をオフすると共に、発
光ダイオードが消灯する。これによってモータの停止し
た原因が過負荷によるものではなく電池切れによるもの
であることを表示することができる。Also, in the initial stage of motor startup, the startup delay circuit 13
The time constant circuit CsRs holds the transistor Q 4 in the ON state, thereby preventing the sawtooth wave voltage from being input to the comparison circuit 12 and delaying the operation start of the overload detection circuit 14.
Reference numeral 16 is a circuit for adjusting the gain of the DC amplification circuit 8 and is for adjusting the speed of the motor M. Reference numeral 17 is a constant voltage circuit that supplies a power supply voltage Vc to each circuit, and the power supply of this constant voltage circuit 17 shares the battery power supply Vb of the motor M. When the voltage Vc decreases, the sum of the divided voltage by the resistors Rb 1 and Rb 2 and the base-emitter voltage of the transistor Q 5 becomes lower than the sum of the voltages of the Zener diode Dz and the light emitting diode LED, and the transistor Q 6 is turned off. At the same time, the light emitting diode is turned off. This makes it possible to display that the cause of the motor stop is not due to overload but due to battery exhaustion.
［発明の効果］ 本発明に上述のように、波形整形回路を、周波数発生器
の出力にバイアス電圧を重畳して脈流とするレベルシフ
ト回路と、この脈流電圧を上記バイアス電圧よりも若干
低い基準電圧と比較する脈流電圧比較回路と、この脈流
電圧比較回路の出力を整形する整形回路とで構成してあ
るので、レベルシフト回路で周波数発生器の出力は重畳
するバイアス電圧を、モータ停止時の反動による回転程
度では波形整形回路の出力がリセットされることがない
ように設定すれば、モータを収納した機器本体が反動で
モータ回転方向と反対方向に回転しても、鋸歯状波電圧
比較回路の出力がリセットされず、モータへの給電を遮
断した状態に保つことができ、過負荷時のモータおよび
半導体スイッチング素子の保護機能を正常に働かせるこ
とができる。しかも、フリップフリップなどの保持手段
を特別に設けることなく、周波数発生器の出力にバイア
ス電圧を重畳するという簡単な方法で、上記効果を得る
ことができるという利点もある。[Effects of the Invention] As described above in the present invention, the waveform shaping circuit is a level shift circuit that superimposes a bias voltage on the output of the frequency generator to generate a pulsating current, and this pulsating current voltage is slightly lower than the bias voltage. Since it is composed of a pulsating current voltage comparison circuit for comparing with a low reference voltage, and a shaping circuit for shaping the output of this pulsating current voltage comparison circuit, the output of the frequency generator in the level shift circuit is a bias voltage to be superimposed, If it is set so that the output of the waveform shaping circuit is not reset by the rotation due to the recoil when the motor is stopped, the sawtooth shape will be generated even if the device housing the motor rotates by the recoil in the direction opposite to the motor rotation direction. The output of the wave voltage comparison circuit is not reset and the power supply to the motor can be kept cut off, and the protection function of the motor and semiconductor switching element at overload can work normally. You can Moreover, there is also an advantage that the above effect can be obtained by a simple method of superimposing a bias voltage on the output of the frequency generator, without specially providing a holding means such as flip-flop.
第１図は本発明の一実施例を示すブロック回路図、第２
図は同上の具体回路図、第３図は同上の各部波形図、第
４図は同上の過負荷時の動作を示す各部波形図、第５図
は従来例の問題となる動作の説明図である。 １は周波数発生器、２はレベルシフト回路、３は脈流電
圧比較回路、４は整形回路、５は波形整形回路、６は鋸
歯状波発生回路、７はサンプルホールド回路、８は直流
増幅回路、９は基準三角波発生回路、10は三角波電圧比
較回路、11はスイッチング素子、12は鋸歯状波電圧比較
回路、13は起動時作動遅延回路、14は過負荷検出回路、
15はモータ速度制御IC、16はゲイン調整回路、17は定電
圧回路、Vf1,Vf2は基準電圧、Vdcはバイアス電圧、Vbは
電池電源電圧、Vcは定電圧電源電圧、Ｍはモータ、Dzは
定電圧要素あるいはツェナーダイオード、LEDは発光ダ
イオード。FIG. 1 is a block circuit diagram showing an embodiment of the present invention, and FIG.
FIG. 4 is a detailed circuit diagram of the same as above, FIG. 3 is a waveform diagram of each part of the same, FIG. 4 is a waveform diagram of each part of the same showing an operation at the time of overload, and FIG. 5 is an explanatory diagram of a problematic operation of the conventional example. is there. 1 is a frequency generator, 2 is a level shift circuit, 3 is a pulsating current voltage comparison circuit, 4 is a shaping circuit, 5 is a waveform shaping circuit, 6 is a sawtooth wave generation circuit, 7 is a sample hold circuit, and 8 is a DC amplification circuit. , 9 is a reference triangular wave generation circuit, 10 is a triangular wave voltage comparison circuit, 11 is a switching element, 12 is a sawtooth wave voltage comparison circuit, 13 is a start-up operation delay circuit, 14 is an overload detection circuit,
15 is a motor speed control IC, 16 is a gain adjusting circuit, 17 is a constant voltage circuit, Vf 1 and Vf 2 are reference voltages, Vdc is a bias voltage, Vb is a battery power supply voltage, Vc is a constant voltage power supply voltage, M is a motor, Dz is a constant voltage element or Zener diode, and LED is a light emitting diode.
Claims (4)
換してパルス波形にする波形整形回路と、上記パルスを
タイミング信号として鋸歯状波を発生する鋸歯状波発生
回路と、上記鋸歯状波電圧を基準電圧と比較し、その出
力でモータ給電回路に挿入されたスイッチング素子を制
御して過負荷時にモータへの給電を遮断する鋸歯状波電
圧比較回路を備え、上記波形整形回路を、周波数発生器
の出力にバイアス電圧を重畳して脈流とするレベルシフ
ト回路と、この脈流電圧を上記バイアス電圧よりも若干
低い基準電圧と比較する脈流電圧比較回路と、この脈流
電圧比較回路の出力を整形する整形回路とで構成して成
ることを特徴とするモータ制御装置。1. A waveform shaping circuit for converting an output of a frequency generator connected to a rotary shaft into a pulse waveform, a sawtooth wave generating circuit for generating a sawtooth wave using the pulse as a timing signal, and the sawtooth waveform. The sawtooth wave voltage comparison circuit that compares the wave voltage with the reference voltage and controls the switching element inserted in the motor power supply circuit by its output to cut off the power supply to the motor at the time of overload, and the above waveform shaping circuit, A level shift circuit that superimposes a bias voltage on the output of the frequency generator to create a pulsating flow, a pulsating voltage comparison circuit that compares this pulsating voltage with a reference voltage that is slightly lower than the bias voltage, and this pulsating voltage comparison A motor control device comprising a shaping circuit for shaping the output of the circuit.
出力端に信号が出力されることを阻止する作動遅延手段
を備えたことを特徴とする特許請求の範囲第１項記載の
モータ制御装置。2. The motor control device according to claim 1, further comprising operation delay means for preventing a signal from being output to the output terminal of the sawtooth voltage comparison circuit when the motor is started. .
ングパルスでサンプリング保持するサンプルホールド回
路と、この保持レベルを基準三角波発生回路の出力と比
較する三角波電圧比較回路を備え、この三角波電圧比較
回路の出力で上記スイッチング素子を制御することによ
り、モータの速度を制御して成ることを特徴とする特許
請求の範囲第１項記載のモータ制御装置。3. A sample hold circuit for sampling and holding the peak value of the sawtooth wave voltage with the timing pulse, and a triangular wave voltage comparing circuit for comparing the holding level with the output of a reference triangular wave generating circuit. The motor control device according to claim 1, wherein the speed of the motor is controlled by controlling the switching element with the output of the circuit.
路の電源をモータの電池電源と共用し、この定電圧回路
の定電圧素子の一部として電池切れ表示用発光ダイオー
ドを使用したことを特徴とする特許請求の範囲第１項記
載のモータ制御装置。4. A constant voltage circuit for supplying a power source voltage to each of the above circuits is also used as a battery power source for a motor, and a dead battery light emitting diode is used as part of the constant voltage element of this constant voltage circuit. The motor control device according to claim 1, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59122354A JPH0669304B2 (en) | 1984-06-14 | 1984-06-14 | Motor control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59122354A JPH0669304B2 (en) | 1984-06-14 | 1984-06-14 | Motor control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS614481A JPS614481A (en) | 1986-01-10 |
| JPH0669304B2 true JPH0669304B2 (en) | 1994-08-31 |
Family
ID=14833837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59122354A Expired - Lifetime JPH0669304B2 (en) | 1984-06-14 | 1984-06-14 | Motor control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0669304B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2965587B2 (en) * | 1989-09-26 | 1999-10-18 | 松下電工株式会社 | Motor speed control circuit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49121916A (en) * | 1973-03-30 | 1974-11-21 | ||
| JPS54957U (en) * | 1977-06-04 | 1979-01-06 | ||
| JPS5631393A (en) * | 1979-08-22 | 1981-03-30 | Hitachi Ltd | Controlling device for motor |
| JPS5748086A (en) * | 1980-09-03 | 1982-03-19 | Oriental Motor Co Ltd | Electric switch controller |
-
1984
- 1984-06-14 JP JP59122354A patent/JPH0669304B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS614481A (en) | 1986-01-10 |
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| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |