JPS61170292A - Brushless motor - Google Patents
Brushless motorInfo
- Publication number
- JPS61170292A JPS61170292A JP60009565A JP956585A JPS61170292A JP S61170292 A JPS61170292 A JP S61170292A JP 60009565 A JP60009565 A JP 60009565A JP 956585 A JP956585 A JP 956585A JP S61170292 A JPS61170292 A JP S61170292A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- commutation
- induced voltage
- drive winding
- induced
- 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.)
- Granted
Links
- 238000004804 winding Methods 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims description 12
- 230000003321 amplification Effects 0.000 claims 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims 3
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims 1
- 230000001276 controlling effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000010354 integration 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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
- H02P6/18—Circuit arrangements for detecting position without separate position detecting elements
- H02P6/182—Circuit arrangements for detecting position without separate position detecting elements using back-emf in windings
-
- 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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
- H02P6/085—Arrangements for controlling the speed or torque of a single motor in a bridge configuration
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の利用分野］
本発明は、駆動巻線に誘起される誘起電圧によって界磁
回転子の位百を検出して回転制御する形式のブラシレス
モータに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a brushless motor in which the rotation of a field rotor is controlled by detecting the position of a field rotor using an induced voltage induced in a drive winding.
従来、ホール素子やエンコーダ等のような特別なセンサ
ーを持たないで、駆動巻線に誘起される誘起電圧によっ
て界磁回転子の回転位置を検出し、これによって駆動巻
線の電流を転流して界磁回転子を回転させるようにした
ブラシレスモータが知られている（特公昭５８−２５０
３８号、特公昭５９−３６５２０号）。し、かしながら
、転流回路によって高速に転流が行われる駆動巻線の誘
起電圧のみを正確に検出することは困難であり、駆動巻
線の自己インダクタンス等によるノイズは積分回路で平
滑する等し・て使用しているが、積分回路の時定数が大
きくて、急速な速度変動に追従できなかったり、駆動巻
線の自己インダクタンスによるノイズの大きさが駆動巻
線の電流（即ち、負荷の大きさ）によって変化すること
により、積分後の波形に位相誤差が生じてしまう等の問
題があり、その用途は負荷変動の小さいエアコンのコン
プレッサー等に限られていた。又、この種のモータに過
大の負荷や急激な負荷変動等の外乱をｒｙえると。Conventionally, the rotational position of the field rotor is detected by the induced voltage induced in the drive winding, without special sensors such as Hall elements or encoders, and the current in the drive winding is commutated based on this. A brushless motor that rotates a field rotor is known (Special Publication No. 58-250).
No. 38, Special Publication No. 59-36520). However, it is difficult to accurately detect only the induced voltage in the drive winding, which is commutated at high speed by the commutation circuit, and the noise caused by the self-inductance of the drive winding is smoothed out by the integrating circuit. However, the time constant of the integrator circuit is large and it cannot follow rapid speed fluctuations, and the noise level due to the self-inductance of the drive winding is large enough that the current in the drive winding (i.e., the load There are problems such as a phase error occurring in the waveform after integration due to the change depending on the magnitude of the load, and its use has been limited to air conditioner compressors with small load fluctuations. Also, if this type of motor is subjected to disturbances such as excessive loads or sudden load fluctuations.
モータ及び制御回路が追従できなくなり、失速、停止１
ニジてしまう等の問題もあり、その用途を益々せまくし
ていた。The motor and control circuit can no longer follow up, stalling, and stopping 1
There were also problems such as leakage, which made it increasingly difficult to use it.
本発明の目的は、駆動巻線の誘起電圧を高速かつ正確に
検出して、転流のタイミングを正確に行い、し、かも、
負荷急変等に対する転流のタイミングの変更を速やかに
行ってモータの性能を高め、適用範囲の広いブラシレス
モータを提供することにある。An object of the present invention is to detect the induced voltage of the drive winding at high speed and accurately, and to perform commutation timing accurately.
To provide a brushless motor that can quickly change commutation timing in response to sudden changes in load, improve motor performance, and have a wide range of applications.
本発明の他の目的は、モータに対して不測の外乱が加わ
って失速、停止の状態に陥った場合も、自動的に正常運
転に復帰することによって安全に動作する実用性の高い
ブラシレスモータを提供することにある。Another object of the present invention is to provide a highly practical brushless motor that operates safely by automatically returning to normal operation even when the motor stalls or stops due to unexpected disturbances. It is about providing.
本発明は、駆動巻線に誘起される誘起電圧によって界磁
回転子の回転位置を検出する形式のブラシレスモータに
おいて、駆動巻線に接続される転流素子がオフ状態にあ
る時間内に駆動巻線の誘起電圧を検出し７、この検出さ
れた電圧と電源電圧よリ得られる基準電圧とを比較して
、転流制御信号と誘起電圧の位相差に応じた信号を得、
この位相差に応じ、た信号によって、その位相が一定に
なるように電源電圧又は転流回路の出力電圧を制御する
ことを基本とするものである。The present invention provides a brushless motor in which the rotational position of a field rotor is detected by an induced voltage induced in the drive winding, in which the drive winding is Detecting the induced voltage in the line 7, comparing the detected voltage with a reference voltage obtained from the power supply voltage to obtain a signal corresponding to the phase difference between the commutation control signal and the induced voltage,
The basic idea is to control the power supply voltage or the output voltage of the commutation circuit using a signal according to this phase difference so that the phase is constant.
第１図は本発明の一実施例を示すブロック図であり、第
２図はその動作を説明するタイミングチャー１〜である
。FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a timing chart 1 to explain its operation.
第１図において、１は永久磁石等で構成された界磁回転
子、２け駆動巻線であり、二Ｎでは３相巻線とする。３
は転流回路で、トランジスタ３ａ〜３ｆ及びこれらと並
列に接続されたダイオード３ｇ〜３Ｄ、によって構成さ
れ、転流制御回路４が出力する転流制御信号ｇ１〜ｇ６
によりトランジスタ３８〜３ｆをオン・オフして駆動巻
線２の電流を転流する。転流制御回路４は同期信号発生
器１０が出力する同期信号に基いて転流制御信号ｇ１〜
ｇ６と誘起電圧検出用のタイミングパルスｔ１、ｔ２．
ｔ３を生成する回路である。誘起電圧＝４−
検出器５はタイミングパルスｔｌ、ｔ２．ｔ３に基いて
駆動巻線２の端子電圧ｘｌ、ｘ２．ｘ３をす〕ノブリン
グし２、誘起電圧と転流制御信号の位相差に応じた電圧
ｐを検出する回路である。In FIG. 1, reference numeral 1 denotes a field rotor composed of permanent magnets, etc., and a two-piece drive winding, and in the case of 2N, it is a three-phase winding. 3
is a commutation circuit, which is composed of transistors 3a to 3f and diodes 3g to 3D connected in parallel with these, and receives commutation control signals g1 to g6 output by the commutation control circuit 4.
The transistors 38 to 3f are turned on and off to commutate the current in the drive winding 2. The commutation control circuit 4 generates commutation control signals g1 to 1 based on the synchronization signal output from the synchronization signal generator 10.
g6 and timing pulses t1, t2 .
This is a circuit that generates t3. Induced voltage=4- The detector 5 receives timing pulses tl, t2. t3, the terminal voltages xl, x2 . This is a circuit that detects the voltage p according to the phase difference between the induced voltage and the commutation control signal.
誘起電圧検出器５は第３図の如く構成され、タイミング
パルスｔｌ、ｔ２．ｔ３に応じて駆動巻線２の端子電圧
ｘｌ、ｘ２．ｘ３の傾斜部分を双方向アナログスイッチ
５ａ、５ｂ、５ｃで順次サンプリングする。一つの駆動
巻線に接続される転流素子（トランジスタ）がすべてオ
フの期間において、該当駆動巻線の端子電圧は、第２図
に示すように誘起電圧波形がそのま＞現われる。コンデ
ンサ５ｄにより、この検出された誘起電圧を次の検出タ
イミングまで保持して電圧ｐを得る。The induced voltage detector 5 is configured as shown in FIG. 3, and receives timing pulses tl, t2 . t3, the terminal voltages xl, x2 . The slope portion of x3 is sequentially sampled by bidirectional analog switches 5a, 5b, and 5c. During a period in which all of the commutating elements (transistors) connected to one drive winding are off, the terminal voltage of the corresponding drive winding exhibits an induced voltage waveform as shown in FIG. The capacitor 5d holds this detected induced voltage until the next detection timing to obtain the voltage p.
第１図に戻り、差動増巾器７は誘起電圧検出器５で検出
された電圧ｐと電源電圧Ｅを抵抗６−１゜６−２で分割
して得られる基準電圧とを比較して、その比較結果に応
じた電圧を得る回路である。起動時定数回路８は外部か
らの起動信号あるいは脱調検出回路１４からの再起動信
号を受は取って、所定の時定数で十Ａする電圧を出力す
る回路である。切換器９は、起動時定数回路８の出力電
圧あるいは差動増１］器７の出力電圧を選択する回路で
ある。同期信号発生器１０は電圧に応じた周波数の同期
信号ＣＫを発生する可変周波数発振器であり、起動時定
数回路８の出力電圧によって制御される。電源電圧調整
用トランジスタ１１は電源と転流回路３の間に挿入され
、切換器９を介し起動時定数回路８あるいは差動増１１
器７の出力電圧によって電源電圧を調整するものである
。脱強検出回路１２は、モータが失速又は停止した時、
起動時定数回路８を再起動するのに用いられる。Returning to FIG. 1, the differential amplifier 7 compares the voltage p detected by the induced voltage detector 5 with a reference voltage obtained by dividing the power supply voltage E by resistors 6-1 and 6-2. , is a circuit that obtains a voltage according to the comparison result. The startup time constant circuit 8 is a circuit that receives an external startup signal or a restart signal from the step-out detection circuit 14 and outputs a voltage of 10 A with a predetermined time constant. The switch 9 is a circuit that selects the output voltage of the starting time constant circuit 8 or the output voltage of the differential amplifier 7. The synchronization signal generator 10 is a variable frequency oscillator that generates a synchronization signal CK with a frequency depending on the voltage, and is controlled by the output voltage of the startup time constant circuit 8. The power supply voltage adjustment transistor 11 is inserted between the power supply and the commutation circuit 3, and is connected to the starting time constant circuit 8 or the differential amplifier 11 via the switch 9.
The power supply voltage is adjusted according to the output voltage of the device 7. The destrengthening detection circuit 12 detects when the motor stalls or stops.
It is used to restart the startup time constant circuit 8.
以下、第１図に示す実施例の動作について詳述する。The operation of the embodiment shown in FIG. 1 will be described in detail below.
まず、起動時の動作について説明する。外部からの起動
信号が起動時定数回路８に印加されると。First, the operation at startup will be explained. When an external activation signal is applied to the activation time constant circuit 8.
該起動時定数回路８は所定の時定数で上昇する電圧を出
力し、これが切換器９を通して同期信号発生器１０に与
えられる。同期信号発生器１０は、この起動時定数回路
８の出力電圧に基いて、モータの起動が可能な低い周波
数で発振を開始して徐々に高い周波数となり、最終的に
一定の周波数に到達する。この同期信号発生器１０の発
振周波数に応じた同期信号ＣＫにより、転流制御回路４
からは、初め長い周期の転流制御信号線ｇ１〜ｇ６が出
力され、それが徐々に短い周期のものとなる。The starting time constant circuit 8 outputs a voltage that increases at a predetermined time constant, and this is applied to the synchronizing signal generator 10 through a switch 9. Based on the output voltage of the starting time constant circuit 8, the synchronizing signal generator 10 starts oscillating at a low frequency capable of starting the motor, gradually increases the frequency, and finally reaches a certain frequency. The commutation control circuit 4 is controlled by the synchronous signal CK corresponding to the oscillation frequency of the synchronous signal generator 10
, commutation control signal lines g1 to g6 with long cycles are output at first, and gradually become shorter cycles.
転流回路３のトラジスタ３ａ〜３ｆは、この転流制御信
号ｇ１〜ｇ６によってオン・オフされ、その結果、駆動
巻線２の電流は初め長い周期で転流して徐々に短くなり
、これに応じて界磁回転子１は低速で回転を始めて徐々
に高速になり、最終的に定格速度に到達する。The transistors 3a to 3f of the commutation circuit 3 are turned on and off by the commutation control signals g1 to g6, and as a result, the current in the drive winding 2 first commutates in a long cycle and gradually becomes shorter, and then The field rotor 1 starts rotating at a low speed, gradually increases the speed, and finally reaches the rated speed.
次に定常運転時の動作について説明する。同期信号発生
器１０から出力される同期信号ＣＫに応じて、転流制御
回路４からは誘起電圧検出用のタイミングパルスｔ１．
ｔ２．ｔ３が出力される。Next, the operation during steady operation will be explained. In response to the synchronization signal CK output from the synchronization signal generator 10, the commutation control circuit 4 outputs timing pulses t1.
t2. t3 is output.
このタイミングパルスｔｌ、ｔ２．ｔ３に基いて。These timing pulses tl, t2. Based on t3.
誘起電圧検出器５は駆動巻線２の端子電圧ｘｌ。The induced voltage detector 5 detects the terminal voltage xl of the drive winding 2.
ｘ２．ｘ３をサンプリングし、電圧Ｐを検出する。x2. x3 is sampled and voltage P is detected.
この誘起電圧検出信号５で検出された電圧Ｐと電源電圧
Ｅを抵抗６−１．６−２で分割して得られる基準電圧と
が差動増巾器７で比較され、その比較結果に応じた電圧
が出力側に現われる。起動時定数回路８の出力電圧が所
定値具−ヒに達し、同期信号発生器１０の発振周波数が
一定の周波数似−ヒになって界磁回転子１が一定速度以
上に加速されると、切換器９は差動増巾器７の出力を選
択して電圧調整用トランジスタ１１にり、える。即ち、
電圧調整用１−ランジスタ１１け、始動時はモータを起
動させるに充分な電圧を転流回路３に供給するが、モー
タ起動後は、差動増巾器７の出力により、転流制御信号
の位相に対して誘起電圧が一定位相になるように電源電
圧を制御する。The voltage P detected by this induced voltage detection signal 5 and the reference voltage obtained by dividing the power supply voltage E by a resistor 6-1, 6-2 are compared by a differential amplifier 7, and depending on the comparison result, voltage appears on the output side. When the output voltage of the starting time constant circuit 8 reaches a predetermined value, the oscillation frequency of the synchronizing signal generator 10 becomes a constant frequency, and the field rotor 1 is accelerated to a constant speed or higher. The switch 9 selects the output of the differential amplifier 7 and outputs it to the voltage adjusting transistor 11. That is,
The 11 transistors for voltage adjustment supply sufficient voltage to start the motor to the commutation circuit 3 during startup, but after the motor starts, the output of the differential amplifier 7 controls the commutation control signal. The power supply voltage is controlled so that the induced voltage has a constant phase with respect to the phase.
第２図に示すように、誘起電圧検出用タイミングパルス
ｔｌ、ｔ２．ｔ３は、各々の駆動巻線２に接続される転
流回路３のトランジスタのオフ期間の真中あたりに設定
される。誘起電圧検出器５は、このタイミングパルスに
応じて駆動巻線２の端子電圧ｘｌ、ｘ２．ｘ３の傾斜部
分をサンプリングするため、一つの駆動巻線に接続され
るトランジスタがすべてオフの期間において、駆動巻線
の端子電圧ｘ ］ ＋ ｘ ２ ＋ ｘ ３は誘起電圧
波形がそのま＞現われる。従って、負荷の変動等により
転流制御信号と誘起電圧の位相差が変わると、ｘｌ〜Ｘ
３の傾斜部分が時間軸方向にすれて、第２図の破線の如
くなる。また、この駆動巻線に対応する誘起電圧検出用
のタイミングパルスがハイの区間においてのみ着目すれ
ば、誘起電圧と転流制御信号の位相差は電圧として獲え
られ、この電圧を検出して次の検出タイミングまで保持
すれば、その電圧は第２図のｐの如くなる。一方、本ブ
ラシレスモータの転流制御信号と誘起電圧の適正な位相
関係は、検出電圧ｐの値が電源電圧Ｅの約２分の１程度
となるときであり、誘起電圧が進みのときは検出電圧ｐ
が上昇し、逆に遅れのときは降下する。As shown in FIG. 2, the timing pulses tl, t2 . t3 is set around the middle of the off period of the transistor of the commutation circuit 3 connected to each drive winding 2. The induced voltage detector 5 detects terminal voltages xl, x2 . Since the slope portion of x3 is sampled, the induced voltage waveform of the terminal voltage x + x 2 + x 3 of the drive winding appears as it is during a period when all the transistors connected to one drive winding are off. Therefore, if the phase difference between the commutation control signal and the induced voltage changes due to load fluctuations, etc.,
The slanted portion 3 is shifted in the time axis direction and becomes as shown by the broken line in FIG. In addition, if we focus only on the period in which the timing pulse for detecting the induced voltage corresponding to this drive winding is high, the phase difference between the induced voltage and the commutation control signal can be captured as a voltage, and this voltage can be detected and the next If the voltage is maintained until the detection timing of , the voltage becomes as shown at p in FIG. On the other hand, the appropriate phase relationship between the commutation control signal and the induced voltage of this brushless motor is when the value of the detected voltage p is approximately one-half of the power supply voltage E, and when the induced voltage is leading, it is detected. voltage p
rises, and conversely when there is a delay, it falls.
差動増巾器７は誘起電圧検出器５で検出された電圧ｐと
電源電圧Ｅを抵抗６−１．６−２で分割して得られる基
準電圧（１／２Ｅ）とを比較し。The differential amplifier 7 compares the voltage p detected by the induced voltage detector 5 with a reference voltage (1/2E) obtained by dividing the power supply voltage E by resistors 6-1, 6-2.
その比較結果に応じた電圧を出力する回路である。This circuit outputs a voltage according to the comparison result.
電圧調整用１ヘランジスタ１１は、この差動増巾器７の
出力に基いて、誘起電圧の位相が適正な位相より進みの
ときは（即ち、誘起電圧検出器５の検出電圧Ｐが高いと
き）、転流回路３に供給する電圧を降下させ、誘起電圧
の位相が遅れのときは（即ち、検出電圧Ｐが低いとき）
、転流回路３に供給する電圧を上げる。転流回路３に供
給される電圧が低くなれば、界磁回転子１は減速されて
誘起電圧が遅れ、ｊφに転流回路３に供給される電圧が
高くなれば、界磁回転子１は加速されて誘起電圧が進み
、結果として転流制御信号と誘起電圧の位相差は、ブラ
シレスモータとして適正な位相関係に保た九る。Based on the output of the differential amplifier 7, the voltage adjusting 1-hylang resistor 11 detects when the phase of the induced voltage is ahead of the appropriate phase (that is, when the detected voltage P of the induced voltage detector 5 is high). , the voltage supplied to the commutation circuit 3 is lowered, and when the phase of the induced voltage is delayed (that is, when the detected voltage P is low)
, the voltage supplied to the commutation circuit 3 is increased. When the voltage supplied to the commutation circuit 3 becomes low, the field rotor 1 is decelerated and the induced voltage is delayed, and when the voltage supplied to the commutation circuit 3 becomes high at jφ, the field rotor 1 The acceleration causes the induced voltage to advance, and as a result, the phase difference between the commutation control signal and the induced voltage is maintained in an appropriate phase relationship for a brushless motor.
第１図の実施例においては、誘起電圧と転流制御信号の
位相差に応じて、トランジスタ１１により電源電圧を制
御するとしたが、転流制御回路４の転流制御信号ｇｌ−
ｇ６の時間１１を変化させて転流素子３８〜３ｆのオン
期間を変え、転流回路３の出力電圧を制御しても同様の
効果が得られる。In the embodiment shown in FIG. 1, the power supply voltage is controlled by the transistor 11 according to the phase difference between the induced voltage and the commutation control signal.
A similar effect can be obtained by changing the time 11 of g6 to change the ON periods of the commutating elements 38 to 3f and controlling the output voltage of the commutating circuit 3.
また、本実施例では、誘起電圧波形の正の傾斜の時間帯
だけに誘起電圧検出用タイミングパルスを設定したが、
誘起電圧波形の負の傾斜の時間；！ＩＦにおいても同様
に設定することか可能であり、位相差と電圧の高低の関
係がｊψになる以外は同様である。従って、誘起電圧の
正負の両方の傾斜部分を検出し、一方を反転させて用い
ることにより、検出の頻度を倍にすることもできる。Furthermore, in this embodiment, the timing pulse for detecting the induced voltage was set only during the period of positive slope of the induced voltage waveform.
Time of negative slope of induced voltage waveform;! It is possible to set the IF similarly, except that the relationship between the phase difference and the voltage level is jψ. Therefore, by detecting both the positive and negative slope portions of the induced voltage and inverting one of them, the frequency of detection can be doubled.
脱調検出回路１２は、抵抗６−１と６−２の中点電圧が
予め定めた値よりはすれたことを検出して、モータの失
速又は停止１−を判定し・、起動時定数回路８を再起動
せしめる働きを有する。この再起動により、同期信号発
生器１０の発振周波数は一旦下がり、その後、徐々に上
昇して通り（（運転の周波数に達する。このようにし、
て、モータが加速されて一定速度以上になると、差動増
巾器７の出力により、切換器９を介して電源電圧が制御
さｉＬ、誘起電圧と転流制御信号を適正な位相差に保つ
通常の運転状態に自動的に復帰する。The step-out detection circuit 12 detects that the midpoint voltage of the resistors 6-1 and 6-2 deviates from a predetermined value, determines whether the motor stalls or stops 1-, and activates the start-up time constant circuit. It has the function of restarting 8. By this restart, the oscillation frequency of the synchronizing signal generator 10 drops once, and then gradually increases until it reaches the operating frequency.
When the motor is accelerated to a certain speed or higher, the power supply voltage is controlled by the output of the differential amplifier 7 via the switch 9, keeping the induced voltage and the commutation control signal at an appropriate phase difference. Automatically returns to normal operating condition.
以上説明したように、本発明によれは、積分器又はフィ
ルタ等を用いないで転流時のサージによる悪影響を回避
し、また、積分器やフィルタによる動作遅れがないので
正確かつ迅速な誘起電圧の検出が可能であり、さらに、
誘起電圧の位相情報が直接アナログ電圧で検出できるの
で、後の処理が簡単で高速応答かつ高安定度の制御ルー
プが容易に構成でき、正確な転流タイミングと負荷急変
に対する耐力性の大きな誘起電圧検出形のブラシレスモ
ータの実現が可能である。しかも、不測の事態によるモ
ータの失速、停止に対しても自動的に通常運転に復帰が
可能な誘起電圧検出形のブラシレスモータが実現される
。As explained above, according to the present invention, the adverse effects of surges during commutation can be avoided without using an integrator or filter, and since there is no operation delay caused by the integrator or filter, the induced voltage can be accurately and quickly. It is possible to detect
Phase information of the induced voltage can be directly detected as an analog voltage, making it easy to perform subsequent processing and easily construct a control loop with high speed response and high stability.The induced voltage has accurate commutation timing and high resistance to sudden load changes. It is possible to realize a detection type brushless motor. Furthermore, an induced voltage detection type brushless motor that can automatically return to normal operation even if the motor stalls or stops due to unforeseen circumstances is realized.
第１図は本発明の一実施例のブロック図、第２図は第１
図の動作を説明するためのタイミング図、第３図は誘起
電圧検出器の詳細図である。
１・・・界磁回転子、 ２・・・駆動巻線、 ３・
・・転流回路、 ４・・・転流制御回路、 ５・・
・誘起電圧検出器、６・・・電源電圧分割抵抗、 ７・
・・差動増１１器、８・・・起動時定数回路、 ９・・
・切換器、１０・・同期信号発生器、 １１・・電源
電圧調整用トランジスタ、 １２・・・脱調検出回路
−Ｌ′４ 山
Ｘ ′Ｘ ン 良
Ｙ 意 ；ζ 磁 式虞は蟲よ
りFIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the present invention.
FIG. 3 is a timing diagram for explaining the operation shown in the figure, and FIG. 3 is a detailed diagram of the induced voltage detector. 1... Field rotor, 2... Drive winding, 3.
... Commutation circuit, 4... Commutation control circuit, 5...
・Induced voltage detector, 6...power supply voltage division resistor, 7.
...Differential amplifier 11, 8...Start-up time constant circuit, 9...
・Switcher, 10... Synchronous signal generator, 11... Transistor for power supply voltage adjustment, 12... Step-out detection circuit - L'4
Claims (3)
巻線の間に接続された複数の転流素子を有する転流手段
と、起動時は低い周波数で発振して徐々に高い周波数と
なり、最終的に所望の周波数に落ち着いて、該周波数に
応じた同期信号を発生する同期信号発生手段と、前記同
期信号発生手段の同期信号に応じて、前記転流素子をオ
ン・オフして駆動巻線の電流を転流する転流制御信号と
駆動巻線の誘起電圧検出用のタイミングパルスとを生成
する転流制御手段と、前記転流制御手段のタイミングパ
ルスに基いて、前記駆動巻線に接続される転流素子がオ
フ状態の期間中に駆動巻線の端子電圧をサンプリングし
、駆動巻線の誘起電圧と転流制御信号の位相差に応じた
電圧を検出する誘起電圧検出手段と、前記誘起電圧検出
段手の検出電圧と電源電圧にもとづく基準電圧を比較し
て、その大小に応じた電圧を検出する差動増巾手段と、
前記差動増巾手段の出力に応じて、転流制御信号の位相
に対して誘起電圧が一定位相になるように電源電圧又は
転流回路の出力電圧を制御する電圧制御手段とを具備し
ていることを特徴とするブラシレスモータ。(1) A commutation means having a field rotor, a plurality of drive windings, and a plurality of commutation elements connected between a power source and the drive windings, and a commutation means that oscillates at a low frequency at the time of startup and gradually A synchronizing signal generating means generates a synchronizing signal corresponding to the high frequency and finally settles down to a desired frequency, and the commutating element is turned on and off according to the synchronizing signal of the synchronizing signal generating means. commutation control means for generating a commutation control signal for commutating the current in the drive winding and a timing pulse for detecting the induced voltage in the drive winding; Induced voltage that samples the terminal voltage of the drive winding while the commutation element connected to the drive winding is in the off state, and detects the voltage according to the phase difference between the induced voltage of the drive winding and the commutation control signal. a detection means, and a differential amplification means for comparing the detected voltage of the induced voltage detection stage with a reference voltage based on a power supply voltage and detecting a voltage according to the magnitude thereof;
Voltage control means for controlling the power supply voltage or the output voltage of the commutation circuit so that the induced voltage has a constant phase with respect to the phase of the commutation control signal according to the output of the differential amplification means. A brushless motor characterized by:
、前記電圧制御手段の動作を開始せしめることを特徴と
する特許請求の範囲第１項記載のブラシレスモータ。(2) The brushless motor according to claim 1, wherein the voltage control means starts operating after the synchronization signal generation means exceeds a desired frequency.
前記同期信号発生手段を再起動する手段を付加してなる
特許請求の範囲第１項もしくは第２項記載のブラシレス
モータ。(3) detecting step-out by the output of the differential amplification means;
3. The brushless motor according to claim 1, further comprising means for restarting said synchronizing signal generating means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60009565A JPS61170292A (en) | 1985-01-22 | 1985-01-22 | Brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60009565A JPS61170292A (en) | 1985-01-22 | 1985-01-22 | Brushless motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61170292A true JPS61170292A (en) | 1986-07-31 |
| JPH0552151B2 JPH0552151B2 (en) | 1993-08-04 |
Family
ID=11723814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60009565A Granted JPS61170292A (en) | 1985-01-22 | 1985-01-22 | Brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61170292A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63206191A (en) * | 1987-02-18 | 1988-08-25 | Nippon Densan Kk | Starting and rotation control of dc brushless motor |
| WO1989005061A1 (en) * | 1987-11-20 | 1989-06-01 | Matsushita Electric Industrial Co., Ltd. | Device for driving brushless motor |
| US4983894A (en) * | 1989-02-01 | 1991-01-08 | Matsushita Electric Industrial Co., Ltd. | Brushless motor driving system |
| JPH0393492A (en) * | 1989-09-05 | 1991-04-18 | Toshiba Corp | Driving device for brushless motor |
| WO1991020123A1 (en) * | 1990-06-18 | 1991-12-26 | The Texas A&M University System | Position sensor elimination technique for the switched reluctance motor drive |
| JPH08223980A (en) * | 1994-12-02 | 1996-08-30 | Samsung Electron Co Ltd | Device and method for protecting starting circuit of dc-brushless-motor compressor |
-
1985
- 1985-01-22 JP JP60009565A patent/JPS61170292A/en active Granted
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63206191A (en) * | 1987-02-18 | 1988-08-25 | Nippon Densan Kk | Starting and rotation control of dc brushless motor |
| WO1989005061A1 (en) * | 1987-11-20 | 1989-06-01 | Matsushita Electric Industrial Co., Ltd. | Device for driving brushless motor |
| US5122715A (en) * | 1987-11-20 | 1992-06-16 | Matsushita Electric Industrial Co., Ltd. | Drive device for a brushless motor |
| US4983894A (en) * | 1989-02-01 | 1991-01-08 | Matsushita Electric Industrial Co., Ltd. | Brushless motor driving system |
| JPH0393492A (en) * | 1989-09-05 | 1991-04-18 | Toshiba Corp | Driving device for brushless motor |
| WO1991020123A1 (en) * | 1990-06-18 | 1991-12-26 | The Texas A&M University System | Position sensor elimination technique for the switched reluctance motor drive |
| JPH08223980A (en) * | 1994-12-02 | 1996-08-30 | Samsung Electron Co Ltd | Device and method for protecting starting circuit of dc-brushless-motor compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0552151B2 (en) | 1993-08-04 |
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