JPH03239186A - Method and apparatus for driving brushless motor - Google Patents
Method and apparatus for driving brushless motorInfo
- Publication number
- JPH03239186A JPH03239186A JP2034320A JP3432090A JPH03239186A JP H03239186 A JPH03239186 A JP H03239186A JP 2034320 A JP2034320 A JP 2034320A JP 3432090 A JP3432090 A JP 3432090A JP H03239186 A JPH03239186 A JP H03239186A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- operation mode
- switching
- brushless motor
- position detection
- 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
- 238000000034 method Methods 0.000 title claims description 7
- 238000001514 detection method Methods 0.000 claims description 42
- 230000001360 synchronised effect Effects 0.000 claims description 30
- 238000004804 winding Methods 0.000 claims description 26
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 17
- 239000004065 semiconductor Substances 0.000 claims description 11
- 230000007935 neutral effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 230000001133 acceleration Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007654 immersion Methods 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
- H02P6/04—Arrangements for controlling or regulating the speed or torque of more than one motor
-
- 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
-
- 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
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はブラシレスモータに係り、特に電機子巻線に誘
起される誘起電圧によって磁石回転子と電機子巻線との
相対的位置を検出し 回転子磁極位置検出器を省略した
ものにおいて、同期運転モードから回転子位置検出運転
モードに滑らかに移行を行うためのブラシレスモータの
駆動に関するものである。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a brushless motor, and in particular detects the relative position of a magnet rotor and an armature winding by an induced voltage induced in an armature winding. This invention relates to driving a brushless motor for smoothly transitioning from a synchronous operation mode to a rotor position detection operation mode in a case where a magnetic pole position detector is omitted.
従来の技術
通常ブラシレスモータには その回転子の磁極位置を検
出するための検出器が必要である力（例えばこのブラシ
レスモータを空調機のコンプレッサに用いようとする場
合、高温高圧条件下で前記検出器の信頼性が保証できな
いたぬ これらの検出器を用いることが出来なＬ℃ 従
ってこのような応用において＜＆ 磁極位置検出器を
用いず、電機子巻線に誘起される電圧信号を検出し そ
れに基づいてモータの転流信号を生成する方法が用いら
れていも
しかし電機子巻線に電圧信号が誘起されるのは回転子が
回転している場合だけで、停止している場合は磁極位置
情報が得られな（−つまり、起動時はこの電圧信号が使
えないわけであム 従って起動時には回転子の磁極位置
にかかわらず電機子巻線に回転磁界が発生するような特
定の信号を与えて、回転子を強制回転させることとなる
。Conventional technology Normally, a brushless motor requires a detector to detect the magnetic pole position of its rotor. Therefore, in such applications, it is necessary to detect the voltage signal induced in the armature winding without using a magnetic pole position detector. However, a voltage signal is induced in the armature winding only when the rotor is rotating, and when the rotor is stationary, the magnetic pole position (-In other words, this voltage signal cannot be used at startup. Therefore, at startup, a specific signal is applied that generates a rotating magnetic field in the armature winding regardless of the rotor's magnetic pole position. This forces the rotor to rotate.
その後、回転子が回転を始めると電機子巻線に誘起され
る電圧信号を検出ａ それに基づいてモータの転流信号
を生成することができるようにな４ こうして、ブラシ
レスモータの駆動１１ 前記同期運転で起動ａ 後に
回転子位置検出運転に切り換える方法がとられていも
また モータに供給する電圧の調整ζ上 直流電源電圧
は一定にしておき、電圧信号パルスのデユーティ比を制
御することによって電圧を制御すべ いわゆるパルス幅
変調を用いも
発明が解決しようとする課題
この同期運転モードと回転子位置検出運転モードの切り
換え方法は各種考案されている力（安定な運転状態を保
ったままで移行するのは困難であり、機械的振動を発生
したり、駆動電流の瞬時的増大を引き起こしモータ駆動
用半導体スイッチング素子に負担を与えることが多かっ
九
本発明（よ 上記従来の課題に鑑へ 同期運転モードで
の回転数 デユーティ比 及び回転子位置検出運転モー
ドでのデユーティ比を適切に設定することによって同期
運転モードから回転子位置検出運転モードの切り換えを
スムーズに行う方法を提供するものであム
課題を解決するための手段
上記課題を解決するために本発明ｊ！ 同期運転モー
ドの回転数と回転子位置検出運転モードの回転数の関係
を回転子位置検出運転モードの回転数が同期運転モード
の回転数と同じかもしくは低くする構成を備えたもので
あも
また 中性点非接地に結線された３相電機子巻線と、直
流電源と、前記電機子巻線への電流を通電 遮断する半
導体スイッチング素子群と、磁石回転子を有するブラシ
レスモータと、起動指令手段と、前記起動指令手段の指
令により同期信号を出力する同期信号発生手段と、前記
同期信号発生手段より出力される信号を用いて前記電機
子巻線に回転磁界を発生させる回転磁界発生手段と、前
記電機子巻線に誘起される電圧信号によって前記電機子
巻線と前記磁石回転子の相対的位置を検出する位置検出
手段と、前記回転磁界発生手段の出力信号と前記位置検
出手段の出力信号を選択し切り換えて出力する切換手段
と、前記切換手段に切換指令を与える切換指令手段と、
前記切換手段の出力信号を用いて前記スイッチング素子
群の駆動信号を生成する駆動信号発生手段と、デユーテ
ィ比指令手段と、前記駆動信号発生手段の出力信号に前
記デユーティ比指令手段の指令に基づいてパルス幅変調
をかけるパルス幅変調手段を備え前記起動指令手段の指
令発生後ＧＥＬ 前記同期信号発生手段の出力信号の
周波数と、前記デューティ比指令を出力し 前記磁石回
転子を回転起動し起動後（上 前記切換手段を切り換え
て前記位置検出手段の出力信号に基づいてブラシレスモ
ータを駆動する構成を備えている。Thereafter, when the rotor starts rotating, a voltage signal induced in the armature winding is detected (a) and a commutation signal for the motor can be generated based on it.4 Thus, the brushless motor is driven (11) and the synchronous operation Even if the method of switching to rotor position detection operation after starting a is
In addition, to adjust the voltage supplied to the motor, the DC power supply voltage should be kept constant and the voltage should be controlled by controlling the duty ratio of the voltage signal pulse. Various methods have been devised to switch between the operating mode and the rotor position detection operating mode. The present invention (in view of the above-mentioned conventional problems) appropriately adjusts the rotation speed and duty ratio in the synchronous operation mode and the duty ratio in the rotor position detection operation mode. This invention provides a method for smoothly switching from the synchronous operation mode to the rotor position detection operation mode by setting the synchronous operation mode. The relationship between the rotation speed and the rotation speed in the rotor position detection operation mode is such that the rotation speed in the rotor position detection operation mode is the same as or lower than the rotation speed in the synchronous operation mode. a three-phase armature winding connected to ground, a DC power supply, a group of semiconductor switching elements for supplying or interrupting current to the armature winding, a brushless motor having a magnetic rotor, a start command means, and the a synchronizing signal generating means for outputting a synchronizing signal in response to a command from a starting command means; a rotating magnetic field generating means for generating a rotating magnetic field in the armature winding using the signal output from the synchronizing signal generating means; a position detection means for detecting the relative position of the armature winding and the magnet rotor based on a voltage signal induced in the winding; an output signal of the rotating magnetic field generation means; and an output signal of the position detection means. a switching means for switching and outputting; a switching command means for giving a switching command to the switching means;
drive signal generation means for generating a drive signal for the switching element group using the output signal of the switching means; duty ratio command means; GEL includes a pulse width modulation means for applying pulse width modulation, outputs the frequency of the output signal of the synchronization signal generation means and the duty ratio command after generation of the command from the start command means, starts rotation of the magnet rotor, and after the start ( (a) A configuration is provided in which the switching means is switched to drive the brushless motor based on the output signal of the position detection means.
作用
回転子位置検出モードにおいて（よ 回転数は与えるデ
ユーティ比に対してモータ特性や負荷状態によって決ま
る力丈 本発明は上記した構成によって、同期運転モー
ドの回転数と回転子位置検出運転モードの回転数の関係
を回転子位置検出運転モードの回転数が同期運転モード
の回転数と同じかもしくは低くなるように同期運転モー
ドでの回転数、デユーティ比 及び回転子位置検出運転
モードでのデユーティ比を設定することにより、同期運
転モードから回転子位置検出運転モードの切り換えをス
ムーズに行うことを実現する。In the operating rotor position detection mode (the rotation speed is determined by the motor characteristics and load condition with respect to the given duty ratio) The number of rotations in the synchronous operation mode, the duty ratio, and the duty ratio in the rotor position detection operation mode should be adjusted so that the rotation speed in the rotor position detection operation mode is the same as or lower than the rotation speed in the synchronous operation mode. By setting this, it is possible to smoothly switch from the synchronous operation mode to the rotor position detection operation mode.
実施例
以下、本発明の実施例について図面を参考に説明すも
第２図は本発明の実施例におけるブラシレスモータの起
動装置のブロック図であム 第２図において、 ｌは直
流重態 ２は半導体スイッチング素子群でＱｌ−Ｑ６の
６個のトランジスタとそれぞれに逆並列接続された６個
のダイオードからなも３はブラシレスモータで３相結線
された電機子巻線４と磁石回転子５からなム ６は位置
検出手段７は切換半没 ８は駆動信号発生回路 ９はパ
ルス幅変調半没 １０は同期信号発生回路 １１は回転
磁界発生回路 １２は起動指令手段 １３は切換指令半
没 １４はデユーティ比指令手段であ以上の構成により
、起動時は回転磁界発生手段１１の出力信号を切換手段
７によって駆動信号発生手段８に伝え その出力信号に
同期運転モード用に設定されたパルス幅変調をかけて半
導体スイッチング素子群２のトランジスタを駆動しブラ
シレスモータ３を起動すム そしてブラシレスモータ３
が回転し始めると、電機子巻線４に発生する誘起電圧よ
り位置検出手段６で磁石回転子５の磁極位置を検出し
その信号を切換手段７によって駆動信号発生手段８に伝
え それに回転子位置検出モード用に設定されたパルス
幅変調をかけて半導体スイッチング素子群２のトランジ
スタを駆動し ブラシレスモータ３を制御するものであ
も第３図は 第２図のブロック図をより具体的に構成し
たもので、第２図と同一のもへ もしくは同一の働きを
するものには同一の符号を付している。Embodiments Hereinafter, embodiments of the present invention will be explained with reference to the drawings. Fig. 2 is a block diagram of a brushless motor starting device in an embodiment of the present invention. In Fig. 2, 1 is a direct current heavy state, and 2 is a semiconductor. The switching element group consists of 6 transistors Ql-Q6 and 6 diodes connected in anti-parallel to each, and 3 is a brushless motor consisting of an armature winding 4 and a magnet rotor 5 connected in 3 phases. 6 is a position detection means 7 for switching half-recessed; 8 is a drive signal generation circuit; 9 is a pulse width modulation half-recessed; 10 is a synchronizing signal generation circuit; 11 is a rotating magnetic field generation circuit; 12 is a starting command means; 13 is a switching command half-recessed; 14 is a duty ratio With the above configuration, the command means transmits the output signal of the rotating magnetic field generating means 11 to the drive signal generating means 8 by the switching means 7 at startup, and applies pulse width modulation set for the synchronous operation mode to the output signal. Drives the transistor of the semiconductor switching element group 2 and starts the brushless motor 3.
When the magnet rotor 5 starts to rotate, the position detection means 6 detects the magnetic pole position of the magnet rotor 5 from the induced voltage generated in the armature winding 4.
The switching means 7 transmits the signal to the drive signal generating means 8, which applies pulse width modulation set for the rotor position detection mode to drive the transistors of the semiconductor switching element group 2, thereby controlling the brushless motor 3. Figure 3 is a more specific configuration of the block diagram in Figure 2, and the same parts or functions as those in Figure 2 are given the same reference numerals.
同図において、 １〜５は第２図と全く同様であも ６
は位置検出回路で３つのフィルタ６１〜６３とコンパレ
ータ群６４からなム ７は切換同区８は駆動信号発生回
路 ９はパルス幅変調同区１０は同期信号発生回ａ
１１は回転磁界発生回路 １３は切換指令回ａ １５
はマイクロコンピュータで第１図の起動指令手段１２、
デユーティ比指令手段１４に相当し 同期信号発生回路
１０に起動指令信号１５１を、パルス幅変調回路９にデ
ユーティ比指令信号１５３をそれぞれ出力すム以上のよ
うに構成されたブラシレスモータの駆動装置の実施例に
ついて、その動作を説明すムまず、マイクロコンピュー
タ１５から起動指令信号１５１、切換信号１５２、デユ
ーティ比指令信号１５３が同時に出力されも 起動指令
信号１５１を受けた同期信号発生回路１０ｉ上 第４図
に示すような同期信号１００を出力すム この同期信号
１００に基づいて回転磁界発生回路１１が第４図に示す
信号１１１〜１１３を出力すも 切換回路７は駆動信号
発生回路８の入力信号８７〜８９を、位置検出回路６の
出力信号とする力＼ 回転磁界発生回路１１の出力信号
とするかを切り換える回路で、起動時は前記切換信号１
５２により回転磁界発生回路１１の出力信号側に切り換
えられていも この回転磁界発生回路１１の出力信号１
１１〜１１３は駆動信号発生回路８に取り込まれ同回路
から第４図に示す８１〜８６の出力信号を出力すム こ
れら出力信号のう板 ８１〜８３はさらにパルス幅変調
回路９に入力され 前記同期運転モード用に設定された
デユーティ比指令信号１５３に基づいてパルス幅変調が
行なわれ それぞれ半導体スイッチング素子群２のトラ
ンジスタＱ１〜Ｑ３のドライブ信号となる。−刃駆動信
号発生回路８の出力信号８４〜８６ｔｔ、 そのまま
半導体スイッチング素子群２のトランジスタＱ４〜Ｑ６
のドライブ信号となる。これらのドライブ信号により半
導体スイッチング素子群２の６個のトランジスタがスイ
ッチングされ その結果 電機子巻線４に回転磁界が発
生し 磁石回転子５が回転してブラシレスモータ３が起
動することとなムここて 起動指令信号１５１の立ち上
がりと同時に前記同期信号１００と同期運転モード用に
設定されたデユーティ比指令信号１５３が出力さ株ブラ
シレスモータが回転すム
起動抵 切換指令回路１３（↓ 切換信号１５２を出力
し 切換回路７を位置検出回路６側に切り換えも これ
により、駆動信号発生回路８の入力信号８７〜８９は位
置検出回路６の出力信号６４１〜６４３となり、以降電
機子巻線４に発生する誘起電圧信号４１〜４３によりブ
ラシレスモータ３を駆動することとなも また 切換信
号１５２によって同時にマイクロコンピュータ１５から
は回転子位置検出運転モード用に設定されたデユーティ
比指令信号が出力されも 換切換信号１５２の立ち下げ
に続いて起動指令信号１５１を解除し一連の起動動作手
順を初期状態にリセットすム上記一連の動作のうち同期
運転モードから回転子位置検出運転モードに移行したと
きの回転数が同期運転モードの回転数と同じかもしくは
低くなるように前記同期信号］００、同期運転モードで
のデユーティ比指令信号１５３、及び回転子位置検出運
転モードでのデユーティ比指令信号１５３を設定する。In the figure, 1 to 5 are exactly the same as in Figure 2.6
is a position detection circuit consisting of three filters 61 to 63 and a comparator group 64; 7 is a switching circuit; 8 is a drive signal generation circuit; 9 is a pulse width modulation circuit; 10 is a synchronization signal generation circuit a.
11 is a rotating magnetic field generation circuit 13 is a switching command circuit a 15
is a microcomputer that executes the activation command means 12 in FIG.
Implementation of a brushless motor drive device configured as above, which corresponds to the duty ratio command means 14 and outputs a start command signal 151 to the synchronization signal generation circuit 10 and a duty ratio command signal 153 to the pulse width modulation circuit 9. As an example, the operation will be explained. First, even if the microcomputer 15 outputs the start command signal 151, the switching signal 152, and the duty ratio command signal 153 at the same time, the synchronization signal generation circuit 10i that receives the start command signal 151 will be shown in FIG. Based on this synchronization signal 100, the rotating magnetic field generation circuit 11 outputs the signals 111 to 113 shown in FIG. ~89 is a circuit that switches between the output signal of the position detection circuit 6 and the output signal of the rotating magnetic field generation circuit 11. At startup, the switching signal 1 is used.
52, the output signal 1 of the rotating magnetic field generating circuit 11 is switched to the output signal side of the rotating magnetic field generating circuit 11.
11 to 113 are taken into the drive signal generation circuit 8, which outputs output signals 81 to 86 shown in FIG. 4. These output signals 81 to 83 are further input to the pulse width modulation circuit 9. Pulse width modulation is performed based on the duty ratio command signal 153 set for the synchronous operation mode, and each becomes a drive signal for the transistors Q1 to Q3 of the semiconductor switching element group 2. - Output signals 84 to 86tt of the blade drive signal generation circuit 8, as they are, transistors Q4 to Q6 of the semiconductor switching element group 2
This becomes the drive signal. These drive signals switch the six transistors of the semiconductor switching element group 2, and as a result, a rotating magnetic field is generated in the armature winding 4, the magnet rotor 5 rotates, and the brushless motor 3 is started. At the same time as the start command signal 151 rises, the duty ratio command signal 153 set for the synchronized operation mode with the synchronization signal 100 is output, and the brushless motor rotates. Then, the switching circuit 7 is switched to the position detection circuit 6 side. As a result, the input signals 87 to 89 of the drive signal generation circuit 8 become the output signals 641 to 643 of the position detection circuit 6, and henceforth the induced voltage generated in the armature winding 4 The voltage signals 41 to 43 drive the brushless motor 3, and the switching signal 152 simultaneously outputs a duty ratio command signal set for the rotor position detection operation mode from the microcomputer 15. , the start command signal 151 is released and the series of start operation procedures is reset to the initial state. Among the above series of operations, when the rotation speed is changed from the synchronous operation mode to the rotor position detection operation mode, the rotation speed is synchronous. The synchronous signal [00], the duty ratio command signal 153 in the synchronous operation mode, and the duty ratio command signal 153 in the rotor position detection operation mode are set so that the rotation speed is the same as or lower than the rotation speed in the operation mode.
第１図を参考に説明すると、同期運転モードにおいては
回転数ｒＯ、デユーティ比ｄＯによって起動を行う。こ
れ（′！、モータの仕様や負荷条件及び半導体スイッチ
ング素子群の許容電流値などの制約を考慮しながら設定
Ｌ さら１回転子位置検出運転モードにおいてはデユー
ティ比をｄｌに設定して回転数ｒ１がｒｌ≦ｒＯとなる
ようにする。この動作により、同期運転モードから回転
子位置検出運転モードの切り換えをスムーズに行うこと
が実現される。例えば 回転子位置検出運転モードでの
デユーティ比をｄ２に設定しては回転数ｒ２がｒ２＞ｒ
Ｏとなり、回転子位置検出運転モードへの移行時に急加
速することとなりスムーズなモード切り換えが望めな（
〜な抵 デユーティ比指令信号１５３ｉ友 回転子位置
検出運転モードではブラシレスモータ３の速度制御のた
めの印加電圧制御指令として、マイクロコンピュータ１
５から出力されも
実施例において同期信号発生回路１０、回転磁界発生回
路１１及び切換指令回路１３はそれぞれ単独の回路とし
だ力丈 これらの回路機能の一部または全てをマイクロ
コンピュータ１５に行なわせてもよ（〜
発明の効果
以上のように本発明（上 中性点非接地に結線された３
相電機子巻線と、直流電源と、前記電機子巻線への電流
を通電 遮断する半導体スイッチング素子群と、磁石回
転子を有するブラシレスモータと、起動指令手段と、前
記起動指令手段の指令により同期信号を出力する同期信
号発生手段と、前記同期信号発生手段より出力される信
号を用いて前記電機子巻線に回転磁界を発生させる回転
磁界発生手段と、前記電機子巻線に誘起される電圧信号
によって前記電機子巻線と前記磁石回転子の相対的位置
を検出する位置検出手段と、前記回転磁界発生手段の出
力信号と前記位置検出手段の出力信号を選択し 切り換
えて出力する切換手段と、前記切換手段に切換指令を与
える切換指令手段と、前記切換手段の出力信号を用いて
前記スイッチング素子群の駆動信号を生成する駆動信号
発生手段と、デユーティ比指令手段と、前記駆動信号発
生手段の出力信号に前記デユーティ比指令手段の指令に
基づいてパルス幅変調をかけるパルス幅変調手段を設ζ
す、前記同期信号発生手段の出力信号の周波数と、同期
運転モードのデユーティ比及び回転子位置検出運転モー
ドのデユーティ比を 回転子位置検出運転モード回転数
が同期運転モードの回転数と同じかもしくは低くなるよ
うに設定することにより、同期運転モードから回転子位
置検出運転モードへの切り換えをスムーズに行うことを
４゜
可能としている。To explain with reference to FIG. 1, in the synchronous operation mode, startup is performed with the rotational speed rO and the duty ratio dO. This ('!, set L while taking into account constraints such as motor specifications, load conditions, and permissible current values of the semiconductor switching element group. Furthermore, in the first rotor position detection operation mode, the duty ratio is set to dl and the rotation speed is r1. is set so that rl≦rO.This operation realizes smooth switching from the synchronous operation mode to the rotor position detection operation mode.For example, if the duty ratio in the rotor position detection operation mode is set to d2. When set, the rotation speed r2 is r2>r
O, and a sudden acceleration occurs when switching to the rotor position detection operation mode, making it impossible to expect a smooth mode change (
Duty ratio command signal 153i is used as an applied voltage control command for speed control of the brushless motor 3 in the rotor position detection operation mode.
In the embodiment, the synchronizing signal generating circuit 10, the rotating magnetic field generating circuit 11, and the switching command circuit 13 are each independent circuits. Moyo(~) The present invention has more than the effects of the invention.
a phase armature winding, a DC power supply, a group of semiconductor switching elements for supplying or interrupting current to the armature winding, a brushless motor having a magnet rotor, a start command means, and a command from the start command means. synchronous signal generating means for outputting a synchronous signal; rotating magnetic field generating means for generating a rotating magnetic field in the armature winding using the signal output from the synchronous signal generating means; a position detection means for detecting the relative position of the armature winding and the magnet rotor based on a voltage signal; and a switching means for selecting and outputting an output signal of the rotating magnetic field generation means and an output signal of the position detection means. a switching command means for giving a switching command to the switching means; a drive signal generation means for generating a drive signal for the switching element group using an output signal of the switching means; a duty ratio command means; and a drive signal generation means. Pulse width modulation means is provided for applying pulse width modulation to the output signal of the means based on a command from the duty ratio command means.
The frequency of the output signal of the synchronizing signal generating means, the duty ratio of the synchronized operation mode, and the duty ratio of the rotor position detection operation mode, and whether the rotation speed of the rotor position detection operation mode is the same as the rotation speed of the synchronous operation mode, or By setting the angle to be lower, it is possible to smoothly switch from the synchronous operation mode to the rotor position detection operation mode by 4 degrees.
【図面の簡単な説明】
第１図（よ 同期運転モードおよび回転子位置検出運転
モードにおける回転数、デユーティ比の関係を示した波
形に 第２図はブラシレスモータの駆動装置のブロック
医 第３図はブラシレスモータの駆動装置の構成図 第
４図は第３図の構成図中の各部波形図である。
ｌ・・・直流電酷 ２・・・半導体スイッチング素子法
３・・・ブラシレスモー久 ４・・・電機子巻線 ５・
・・磁石回転子、６・・・位置検出手段、７・・・切換
手段、 ８・・・駆動信号発生手段、 ９・・・パルス
幅変調半没 １０・・・同期信号発生手段、 １００・
・・同期信号 １１・・・回転磁界発生手段、 １２・
・・起動指令半没１３・・・切換指令手阪 １４・・・
デユーティ比指令手没１５、・・マイクロコンピユー久
１５１・・・起動指令信号 １５２・・・切換信号
１５３・・・デユーティ比指令信号。[Brief explanation of the drawings] Figure 1 shows the waveforms showing the relationship between the rotation speed and duty ratio in the synchronous operation mode and rotor position detection operation mode. Figure 2 shows the block diagram of the brushless motor drive device. Figure 4 is a diagram of the configuration of a drive device for a brushless motor. Figure 4 is a waveform diagram of each part in the configuration diagram of Figure 3. 1... Direct current electric shock 2... Semiconductor switching element method 3... Brushless motor drive 4.・・Armature winding 5・
...Magnetic rotor, 6.Position detection means, 7.Switching means, 8.Drive signal generation means, 9.Pulse width modulation half-immersion 10.Synchronization signal generation means, 100.
...Synchronization signal 11...Rotating magnetic field generating means, 12.
...Start command half-immersed 13...Switching command Tesaka 14...
Duty ratio command 15, Microcomputer 151... Starting command signal 152... Switching signal
153...Duty ratio command signal.
Claims (2)
線に誘起される電圧信号を検出し、この電圧信号を変換
して得られる信号により前記ブラシレスモータの転流信
号を生成することで回転子磁極位置検出器を省略したブ
ラシレスモータにおいて、外部からの強制的な転流信号
によって駆動される期間である同期運転モードと、前記
電圧信号を変換して得られる信号により前記ブラシレス
モータの転流信号を生成することによって駆動される期
間である回転子位置検出運転モードとを切り換える際、
前記同期運転モードの回転数と前記回転子位置検出運転
モードの回転数の関係を前記回転子位置検出運転モード
の回転数が前記同期運転モードの回転数と同じかもしく
は低くなるようにしたことを特徴とするブラシレスモー
タの駆動方法。(1) Detecting a voltage signal induced in the armature winding of a brushless motor having a magnetic rotor, and generating a commutation signal for the brushless motor using the signal obtained by converting this voltage signal, In a brushless motor that does not include a magnetic pole position detector, there is a synchronous operation mode in which the motor is driven by a forced commutation signal from the outside, and a commutation signal of the brushless motor that is driven by a signal obtained by converting the voltage signal. When switching between rotor position detection operation mode, which is a period driven by generating
The relationship between the rotation speed in the synchronous operation mode and the rotation speed in the rotor position detection operation mode is such that the rotation speed in the rotor position detection operation mode is the same as or lower than the rotation speed in the synchronous operation mode. A distinctive feature of the brushless motor drive method.
流電源と、前記電機子巻線への電流を通電、遮断する半
導体スイッチング素子群と、磁石回転子を有するブラシ
レスモータと、起動指令手段と、前記起動指令手段の指
令により同期信号を出力する同期信号発生手段と、前記
同期信号発生手段より出力される信号を用いて前記電機
子巻線に回転磁界を発生させる回転磁界発生手段と、前
記電機子巻線に誘起される電圧信号によって前記電機子
巻線と前記磁石回転子の相対的位置を検出する位置検出
手段と、前記回転磁界発生手段の出力信号と前記位置検
出手段の出力信号を選択し、切り換えて出力する切換手
段と、前記切換手段に切換指令を与える切換指令手段と
、前記切換手段の出力信号を用いて前記スイッチング素
子群の駆動信号を生成する駆動信号発生手段と、デュー
ティ比指令手段と、前記駆動信号発生手段の出力信号に
前記デューティ比指令手段の指令に基づいてパルス幅変
調をかけるパルス幅変調手段とを備え、前記デューティ
比指令手段は同期運転モードの回転数と回転子位置検出
運転モードの回転数の関係を回転子位置検出運転モード
の回転数が同期運転モードの回転数と同じかもしくは低
くなるよう駆動することを特徴とするブラシレスモータ
の駆動装置(2) A brushless motor having a three-phase armature winding connected to an ungrounded neutral point, a DC power supply, a group of semiconductor switching elements for supplying or interrupting current to the armature winding, and a magnet rotor. a start command means; a synchronization signal generation means for outputting a synchronization signal in response to a command from the start command means; and a rotation for generating a rotating magnetic field in the armature winding using the signal output from the synchronization signal generation means. a magnetic field generating means, a position detecting means for detecting the relative position of the armature winding and the magnet rotor based on a voltage signal induced in the armature winding, and an output signal of the rotating magnetic field generating means and the position. a switching means for selecting, switching and outputting an output signal of the detection means; a switching command means for giving a switching command to the switching means; and a drive for generating a drive signal for the switching element group using the output signal of the switching means. A signal generating means, a duty ratio commanding means, and a pulse width modulation means for applying pulse width modulation to the output signal of the drive signal generating means based on a command from the duty ratio commanding means, and the duty ratio commanding means is synchronized. A brushless motor characterized in that the relationship between the number of rotations in the operation mode and the number of rotations in the rotor position detection operation mode is such that the number of rotations in the rotor position detection operation mode is the same as or lower than the number of rotations in the synchronous operation mode. drive unit
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2034320A JP2722750B2 (en) | 1990-02-14 | 1990-02-14 | Drive device for brushless motor |
| PCT/JP1991/000160 WO1991012652A1 (en) | 1990-02-14 | 1991-02-12 | Method of driving brushless motor and device therefor |
| KR1019910701341A KR940009209B1 (en) | 1990-02-14 | 1991-02-12 | Method of driving brushless motor |
| DE19914190250 DE4190250T (en) | 1990-02-14 | 1991-02-12 | |
| DE4190250A DE4190250C2 (en) | 1990-02-14 | 1991-02-12 | Method and device for operating a brushless motor |
| US08/059,348 US5304903A (en) | 1990-02-14 | 1993-05-06 | Brushless motor driving method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2034320A JP2722750B2 (en) | 1990-02-14 | 1990-02-14 | Drive device for brushless motor |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9224620A Division JPH1070895A (en) | 1997-08-21 | 1997-08-21 | Method for driving brushless motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03239186A true JPH03239186A (en) | 1991-10-24 |
| JP2722750B2 JP2722750B2 (en) | 1998-03-09 |
Family
ID=12410871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2034320A Expired - Fee Related JP2722750B2 (en) | 1990-02-14 | 1990-02-14 | Drive device for brushless motor |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2722750B2 (en) |
| KR (1) | KR940009209B1 (en) |
| DE (2) | DE4190250T (en) |
| WO (1) | WO1991012652A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04259491A (en) * | 1991-02-14 | 1992-09-16 | Sharp Corp | Drum type washing machine |
| US6034494A (en) * | 1998-01-20 | 2000-03-07 | Denso Corporation | Control device for brushless DC motor |
| JP2018088809A (en) * | 2015-09-18 | 2018-06-07 | 日本精工株式会社 | Electric power steering device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2345204B (en) | 1999-04-14 | 2000-11-15 | Penny & Giles Drives Technolog | Motor control |
| DE19955247A1 (en) * | 1999-11-17 | 2001-05-31 | Bosch Gmbh Robert | Method for starting a sensorless and brushless DC motor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49104123A (en) * | 1973-02-09 | 1974-10-02 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58195490A (en) * | 1982-05-08 | 1983-11-14 | Hitachi Ltd | Position detector for brushless motor |
-
1990
- 1990-02-14 JP JP2034320A patent/JP2722750B2/en not_active Expired - Fee Related
-
1991
- 1991-02-12 DE DE19914190250 patent/DE4190250T/de active Pending
- 1991-02-12 KR KR1019910701341A patent/KR940009209B1/en not_active IP Right Cessation
- 1991-02-12 DE DE4190250A patent/DE4190250C2/en not_active Expired - Fee Related
- 1991-02-12 WO PCT/JP1991/000160 patent/WO1991012652A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49104123A (en) * | 1973-02-09 | 1974-10-02 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04259491A (en) * | 1991-02-14 | 1992-09-16 | Sharp Corp | Drum type washing machine |
| US6034494A (en) * | 1998-01-20 | 2000-03-07 | Denso Corporation | Control device for brushless DC motor |
| JP2018088809A (en) * | 2015-09-18 | 2018-06-07 | 日本精工株式会社 | Electric power steering device |
| JP2018088807A (en) * | 2015-09-18 | 2018-06-07 | 日本精工株式会社 | Electric power steering device |
| US10286949B2 (en) | 2015-09-18 | 2019-05-14 | Nsk Ltd. | Electric power steering apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2722750B2 (en) | 1998-03-09 |
| KR920702068A (en) | 1992-08-12 |
| WO1991012652A1 (en) | 1991-08-22 |
| KR940009209B1 (en) | 1994-10-01 |
| DE4190250C2 (en) | 1995-03-23 |
| DE4190250T (en) | 1992-03-12 |
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