JPH0823694A - Sped control device of dc brushless motor - Google Patents
Sped control device of dc brushless motorInfo
- Publication number
- JPH0823694A JPH0823694A JP6155669A JP15566994A JPH0823694A JP H0823694 A JPH0823694 A JP H0823694A JP 6155669 A JP6155669 A JP 6155669A JP 15566994 A JP15566994 A JP 15566994A JP H0823694 A JPH0823694 A JP H0823694A
- Authority
- JP
- Japan
- Prior art keywords
- speed
- brushless motor
- frequency
- signal
- control
- 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
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、直流ブラシレスモータ
の速度制御装置に関し、特に低速から高速までの広範囲
にわたる速度制御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speed controller for a DC brushless motor, and more particularly to a speed controller for a wide range from low speed to high speed.
【０００２】[0002]
【従来の技術】直流ブラシレスモータは磁極位置の検出
位置に応じて、ある決まったタイミングで各相に通電を
行う相分配が行われる。一つの相に通電されている間に
誘起電圧の歪等の影響で速度変動を生じる。そのため速
度制御性を向上させるためには一つの相に通電している
期間に複数回の速度制御信号が供給されなければならな
い。即ち相分配の周波数より制御周波数を高くする必要
があり、ＰＷＭ制御を行う場合はＰＷＭ周波数を相分配
周波数より高く設定しなければならない。2. Description of the Related Art In a DC brushless motor, phase distribution is performed in which each phase is energized at a certain timing according to the magnetic pole position detection position. While energizing one phase, speed fluctuations occur due to the influence of distortion of the induced voltage. Therefore, in order to improve the speed controllability, the speed control signal must be supplied a plurality of times during the period when one phase is energized. That is, it is necessary to set the control frequency higher than the phase distribution frequency, and when performing PWM control, the PWM frequency must be set higher than the phase distribution frequency.
【０００３】一方相分配周波数は、モータの一回転当た
りの相切り換え数は一義的に定まるので、低速から高速
までの広範囲にわたって変速を行う場合、低速の時は相
分配周波数が低く速度が高くなるにつれて相分配周波数
が高くなる。従って、モータの速度が高いほどＰＷＭ周
波数も高くなっている必要があり、ＰＷＭ周波数は高速
時に合わせて高い周波数に設定されていなければならな
い。しかしながら、ＰＷＭ周波数を高速時に合わせて設
定してしまうと、低速時は通電幅（Duty）が小さいた
め、周波数を高く設定し過ぎるとパワー素子の動作時間
の遅れが存在するため応答が間に合わなくなるという問
題を生じる。On the other hand, in the phase distribution frequency, the number of phase changes per one rotation of the motor is uniquely determined. Therefore, when shifting is performed over a wide range from low speed to high speed, the phase distribution frequency is low and the speed is high at low speed. As the phase distribution frequency increases. Therefore, the higher the motor speed, the higher the PWM frequency must be, and the PWM frequency must be set to a high frequency in accordance with the high speed. However, if the PWM frequency is set at the high speed, the energization width (Duty) is small at the low speed. Therefore, if the frequency is set too high, the operation time of the power element is delayed and the response cannot be made in time. Cause problems.
【０００４】そのため低速から高速まで広範囲にわたり
ＰＷＭ制御を行う場合、変速範囲を段階的に分割して、
分割範囲に対応した信号に基づいてＰＷＭ周波数を段階
的に切り換えなければならない。Therefore, when performing PWM control over a wide range from low speed to high speed, the shift range is divided stepwise,
The PWM frequency must be switched stepwise based on the signal corresponding to the division range.
【０００５】[0005]
【発明が解決しようとする課題】従来技術によるとＰＷ
Ｍ周波数の切り換えがどうしても段階的で、不連続な変
化となってしまう。そのためＰＷＭ周波数の切り換えが
行われる前後に対応する設定速度における速度制御特性
が不連続なものになってしまうという問題があった。ま
たＰＷＭ周波数をかえるための速度分割範囲を示す信号
が必要であり、指令信号が多くなってしまう。According to the prior art, a PW is used.
The switching of the M frequency is inevitably stepwise, resulting in a discontinuous change. Therefore, there is a problem that the speed control characteristic at the set speed corresponding to before and after the switching of the PWM frequency becomes discontinuous. Further, a signal indicating the speed division range for changing the PWM frequency is required, and the number of command signals will increase.
【０００６】本発明の目的は、前述のＰＷＭ周波数の断
続的な切り換えによって生ずる、制御特性の不連続な変
化による影響を排除し、低速から高速まで安定した制御
特性が得られる直流ブラシレスモータのＰＷＭ速度制御
装置を提供する事である。An object of the present invention is to eliminate the influence of the discontinuous change of the control characteristics caused by the intermittent switching of the PWM frequency, and to obtain the stable control characteristics of the DC brushless motor from low speed to high speed. The purpose is to provide a speed control device.
【０００７】[0007]
【課題を解決するための手段】前述の目的を達成するた
めに、制御回路中に直流ブラシレスモータの速度検出信
号を基に、直流ブラシレスモータの速度が低い時には周
波数を低く直流ブラシレスモータの速度が高くなるにつ
れて周波数が連続的に高くするＰＷＭ周波数の自動演算
部を設ける構成とした。In order to achieve the above-mentioned object, when the speed of the DC brushless motor is low, the frequency is low and the speed of the DC brushless motor is low based on the speed detection signal of the DC brushless motor in the control circuit. A configuration is provided in which an automatic calculation unit for the PWM frequency that continuously increases as the frequency increases is provided.
【０００８】[0008]
【作用】本発明の構成図を図１に示し、それぞれの作用
について以下説明する。The operation of the present invention is shown in FIG. 1, and the operation of each will be described below.
【０００９】直流ブラシレスモータ４の速度検出信号は
速度検出部５を介して速度制御演算部１とＰＷＭ周波数
演算部６にそれぞれ供給される。速度制御演算部１では
目標速度と検出速度の偏差に応じた制御演算出力が算出
され、ＰＷＭ周波数演算部６から出力される信号と比較
が行われ調節信号が生成される。この時、ＰＷＭ周波数
演算部６は直流ブラシレスモータの速度を基に周波数を
決定する機能を有し、ＰＷＭ周波数演算部６から出力さ
れる信号は、自動的にモータの検出速度に応じた周波数
となっている構成とする。The speed detection signal of the DC brushless motor 4 is supplied to the speed control calculation unit 1 and the PWM frequency calculation unit 6 via the speed detection unit 5, respectively. The speed control calculation unit 1 calculates a control calculation output according to the deviation between the target speed and the detected speed, and compares it with the signal output from the PWM frequency calculation unit 6 to generate an adjustment signal. At this time, the PWM frequency calculation unit 6 has a function of determining the frequency based on the speed of the DC brushless motor, and the signal output from the PWM frequency calculation unit 6 automatically changes to the frequency corresponding to the detected speed of the motor. The configuration is
【００１０】これにより、調節部２に供給される調節信
号は直流ブラシレスモータ４の速度に応じた周波数の信
号となり、駆動部３を介して直流ブラシレスモータ４に
供給される電力の周波数もこの値と等しくなる。このよ
うにして、直流ブラシレスモータ４に与えられるＰＷＭ
制御信号の周波数は直流ブラシレスモータ４の速度に応
じて自動的，連続的に変化することになり、低速から高
速までの広範囲にわたって安定した速度制御特性を得る
ことができる。As a result, the adjustment signal supplied to the adjustment unit 2 becomes a signal having a frequency corresponding to the speed of the DC brushless motor 4, and the frequency of the electric power supplied to the DC brushless motor 4 via the drive unit 3 also has this value. Is equal to In this way, the PWM applied to the DC brushless motor 4
The frequency of the control signal automatically and continuously changes according to the speed of the DC brushless motor 4, so that stable speed control characteristics can be obtained over a wide range from low speed to high speed.
【００１１】[0011]
【実施例】本発明の一実施例を図２に示す。FIG. 2 shows an embodiment of the present invention.
【００１２】速度検出部５は周波数発電機またはエンコ
ーダとする。速度検出信号を波形生形器７により波形生
形し５０％Dutyの矩形波に変換する。矩形波信号をＣＲ
を通して三角波を生成し適当な増幅器８を介し、速度制
御演算部１の出力信号との比較信号を生成する。この波
形生成器７，三角波生成部，増幅器８がＰＷＭ周波数演
算部６となり、直流ブラシレスモータ４の速度に応じた
ＰＷＭ周波数の信号を自動的に生成することができる。The speed detector 5 is a frequency generator or an encoder. The velocity detection signal is waveform-formed by the waveform generator 7 and converted into a rectangular wave of 50% Duty. CR square wave signal
A triangular wave is generated through a suitable amplifier 8 and a comparison signal with the output signal of the speed control calculation unit 1 is generated. The waveform generator 7, the triangular wave generator, and the amplifier 8 serve as the PWM frequency calculator 6, and can automatically generate a PWM frequency signal according to the speed of the DC brushless motor 4.
【００１３】この結果、速度制御演算部１の出力信号と
ＰＷＭ周波数演算部６の出力信号の比較によって生成さ
れる調節部２に供給される調節信号は直流ブラシレスモ
ータ４の速度に応じた周波数の信号となる。そしてこの
調節信号の周波数はそのまま駆動信号の周波数になるた
め、駆動部３を介して直流ブラシレスモータ４に供給さ
れる電力の周波数も当然この値と等しくなる。As a result, the adjusting signal supplied to the adjusting unit 2 generated by comparing the output signal of the speed control calculating unit 1 and the output signal of the PWM frequency calculating unit 6 has a frequency corresponding to the speed of the DC brushless motor 4. Become a signal. Since the frequency of this adjustment signal becomes the frequency of the drive signal as it is, the frequency of the electric power supplied to the DC brushless motor 4 via the drive unit 3 naturally becomes equal to this value.
【００１４】このようにして、直流ブラシレスモータ４
に与えられるＰＷＭ制御信号の周波数を直流ブラシレス
モータ４の速度に応じて自動的，連続的に変化させるこ
とが可能となる。したがってＰＷＭ周波数の断続的な切
り換えによって生ずる、制御特性の不連続な変化による
影響を排除し、低速から高速までの広範囲にわたって安
定した速度制御特性を得ることができる。In this way, the DC brushless motor 4
It is possible to automatically and continuously change the frequency of the PWM control signal given to the motor according to the speed of the DC brushless motor 4. Therefore, it is possible to eliminate the influence of the discontinuous change in the control characteristic caused by the intermittent switching of the PWM frequency, and obtain a stable speed control characteristic over a wide range from low speed to high speed.
【００１５】[0015]
【発明の効果】本発明によると、ＰＷＭ制御信号の周波
数を直流ブラシレスモータの速度に応じて自動的，連続
的に変化させることが可能となり、低速から高速まで安
定した制御特性が得られる直流ブラシレスモータのＰＷ
Ｍ速度制御装置を提供する事ができる。According to the present invention, the frequency of the PWM control signal can be automatically and continuously changed according to the speed of the DC brushless motor, and the DC brushless can obtain stable control characteristics from low speed to high speed. Motor PW
An M speed control device can be provided.
【図１】本発明の構成図である。FIG. 1 is a configuration diagram of the present invention.
【図２】本発明の一実施例を示す図である。FIG. 2 is a diagram showing an embodiment of the present invention.
１…速度制御演算部、２…調節部、３…駆動部、４…直
流ブラシレスモータ、５…速度検出部、６…ＰＷＭ周波
数演算部、７…波形生成器、８…増幅器。DESCRIPTION OF SYMBOLS 1 ... Speed control calculation part, 2 ... Adjustment part, 3 ... Drive part, 4 ... DC brushless motor, 5 ... Speed detection part, 6 ... PWM frequency calculation part, 7 ... Waveform generator, 8 ... Amplifier.
Claims (1)
検出装置を備え、直流ブラシレスモータへの通電幅を変
えて速度を調節するＰＷＭ制御装置に於いて、速度検出
装置で検出される速度に応じてＰＷＭ周波数を自動的に
変化させて制御を行う事を特徴とする直流ブラシレスモ
ータの速度制御装置。1. A PWM control device, comprising a speed detection device using a frequency generator or an encoder, for adjusting the speed by changing the energization width to a DC brushless motor, wherein the PWM is controlled according to the speed detected by the speed detection device. A speed control device for a DC brushless motor characterized by automatically changing the frequency for control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6155669A JPH0823694A (en) | 1994-07-07 | 1994-07-07 | Sped control device of dc brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6155669A JPH0823694A (en) | 1994-07-07 | 1994-07-07 | Sped control device of dc brushless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0823694A true JPH0823694A (en) | 1996-01-23 |
Family
ID=15611007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6155669A Pending JPH0823694A (en) | 1994-07-07 | 1994-07-07 | Sped control device of dc brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0823694A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH031144A (en) * | 1989-05-29 | 1991-01-07 | Fuji Photo Film Co Ltd | Liquid photosensitive resin composition |
| JPH03126950A (en) * | 1989-10-12 | 1991-05-30 | Fuji Photo Film Co Ltd | Photosetting resin composition |
| EP0929144A2 (en) * | 1997-12-19 | 1999-07-14 | Canon Kabushiki Kaisha | Motor drive control system and method |
| KR101250614B1 (en) * | 2011-12-14 | 2013-04-03 | 삼성전기주식회사 | Motor controlling circuit, motor driving device, and method for cotrolling motor |
| CN104683623A (en) * | 2013-11-28 | 2015-06-03 | 夏普株式会社 | Stepping motor control device and conveying device provided with the same |
-
1994
- 1994-07-07 JP JP6155669A patent/JPH0823694A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH031144A (en) * | 1989-05-29 | 1991-01-07 | Fuji Photo Film Co Ltd | Liquid photosensitive resin composition |
| JPH03126950A (en) * | 1989-10-12 | 1991-05-30 | Fuji Photo Film Co Ltd | Photosetting resin composition |
| EP0929144A2 (en) * | 1997-12-19 | 1999-07-14 | Canon Kabushiki Kaisha | Motor drive control system and method |
| EP0929144A3 (en) * | 1997-12-19 | 2000-04-12 | Canon Kabushiki Kaisha | Motor drive control system and method |
| KR101250614B1 (en) * | 2011-12-14 | 2013-04-03 | 삼성전기주식회사 | Motor controlling circuit, motor driving device, and method for cotrolling motor |
| CN104683623A (en) * | 2013-11-28 | 2015-06-03 | 夏普株式会社 | Stepping motor control device and conveying device provided with the same |
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