JPH0984383A - Brushless motor drive method - Google Patents

Brushless motor drive method

Info

Publication number
JPH0984383A
JPH0984383A JP7260948A JP26094895A JPH0984383A JP H0984383 A JPH0984383 A JP H0984383A JP 7260948 A JP7260948 A JP 7260948A JP 26094895 A JP26094895 A JP 26094895A JP H0984383 A JPH0984383 A JP H0984383A
Authority
JP
Japan
Prior art keywords
energized
phase
brushless motor
stator windings
timing
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
Application number
JP7260948A
Other languages
Japanese (ja)
Inventor
Takashi Ogawa
高志 小川
Tetsuo Nomoto
哲男 野本
Yuichi Izawa
雄一 伊澤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP7260948A priority Critical patent/JPH0984383A/en
Publication of JPH0984383A publication Critical patent/JPH0984383A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To realize a stable operation of a motor by making equal the number of pulses in each power feeding period and eliminating error of the voltage applied to a motor. SOLUTION: In a brushless motor wherein the change of induced voltage on a stator coil to which the power is not fed is detected and combination of stator coils, to which power is applied by providing adequate delay time from the time when such detected signal can be obtained, is sequentially switched, when rotor position is detected from the induced voltage generated on the stator coils and combination of stator coils to be fed is changed from the detected signal obtained, phase of pulse width modulation for adjusting the voltage applied to the motor is synchronized with the timing for changing the combination of the stator coils.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明はエアコン、冷蔵庫等
のコンプレッサのインバータ運転に係り、特に誘起電圧
により位置検出運転されるブラシレスモータの運転方法
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverter operation of a compressor such as an air conditioner or a refrigerator, and more particularly to a method of operating a brushless motor which is position-detected by an induced voltage.

【0002】[0002]

【従来の技術】複数極の永久磁石を有する回転子の回転
によって通電されていない固定子巻線に生じる誘起電圧
の変化に基づいて通電する固定子巻線の組合せを替える
ようにしたブラシレスモータにおいて、固定子巻線への
通電をPWM等により断続的に行い、この断続に合わせ
て前記誘起電圧のA/D変換によって得られるデジタル
データに基づいて算出される誘起電圧の連続した変化と
所定の直流電圧との大小から回転子の回転位置を検出す
るものは、特開平3−82391号公報に知られてい
る。
2. Description of the Related Art In a brushless motor, a combination of stator windings to be energized is changed based on a change in induced voltage generated in a stator winding not energized by rotation of a rotor having a plurality of permanent magnets. , The stator winding is energized intermittently by PWM or the like, and in accordance with this interruption, a continuous change in the induced voltage calculated based on digital data obtained by A / D conversion of the induced voltage and a predetermined change Japanese Patent Application Laid-Open No. 3-82391 discloses a device that detects the rotational position of a rotor based on the magnitude of the DC voltage.

【0003】上記公報に記載の発明においては、ブラシ
レスモータへの印加電圧を調整するパルス幅変調の位相
はモータへの通電開始時に決定された位相がそのまま継
続され制御されている。しかしこの場合、固定子巻線へ
の通電組み合わせを単位とした通電区間をとらえた時、
各区間におけるパルス数に誤差が生じていた。
In the invention described in the above publication, the phase of the pulse width modulation for adjusting the voltage applied to the brushless motor is controlled by continuing the phase determined at the start of energization of the motor. However, in this case, when capturing the energizing section in units of energizing combinations to the stator windings,
There was an error in the number of pulses in each section.

【0004】このことについて図2を参照して説明す
る。図2には、PWM信号が一定周期で発生している場
合のタイミングと、各モータの相に通電する際の通電相
のタイミングを示した。例えば区間1であればU相とW
相に通電され、U相からW相に向かって通電されること
を示す。区間2であればU相からV相へ、同様に順次W
相からV相へ、W相からU相へ、V相からU相へ通電さ
れることを示している。区間1ではPWMによって4パ
ルスの期間実質的に通電されている。一方区間2では3
パルス分と4パルス目の一部の通電期間となり、区間3
では3パルス分と4パルス目の一部の通電期間となる。
この様に電圧調整のためモータへの通電相にPWMをか
けた場合、各区間で必ずしも同じパルス数になるとは限
らない。この誤差はそのままモータへの印加電圧の差と
なり、モータの安定した運転を阻害する要因となってい
た。
This will be described with reference to FIG. FIG. 2 shows the timing when the PWM signal is generated in a constant cycle and the timing of the energized phase when energizing the phase of each motor. For example, in section 1, U phase and W
It is shown that the phases are energized and the phases are energized from the U phase to the W phase. If it is section 2, from W phase to V phase, W in the same way
It is shown that current is supplied from the phase to the V phase, from the W phase to the U phase, and from the V phase to the U phase. In the section 1, the current is substantially energized by the PWM for 4 pulse periods. On the other hand, in section 2 3
It becomes a part of energization period of the pulse part and the fourth pulse, and the section 3
Then, it becomes a part of energization period of the third pulse and the fourth pulse.
In this way, when PWM is applied to the energized phase to the motor for voltage adjustment, the number of pulses does not necessarily become the same in each section. This error directly becomes the difference in the voltage applied to the motor, which is a factor that hinders stable operation of the motor.

【0005】[0005]

【発明が解決しようする課題】本発明は、固定子巻線へ
の通電をPWM等により断続的に行うブラシレスモータ
において、各通電期間におけるパルス数を等しくしてモ
ータへの印加電圧の誤差をなくし、またパルスの発生を
所望の状態にしてモータの安定した運転を図るものであ
る。
SUMMARY OF THE INVENTION According to the present invention, in a brushless motor for intermittently energizing a stator winding by PWM or the like, the number of pulses in each energizing period is made equal to eliminate an error in a voltage applied to the motor. In addition, the pulse generation is set to a desired state to achieve stable operation of the motor.

【0006】[0006]

【課題を解決するための手段】この発明の請求項1に係
る発明は、固定子巻線に生じる誘起電圧から回転子位置
を検出し、得られた検出信号から通電する固定子巻線の
組み合わせを替える時点に同期して、モータの印加電圧
を調整するパルス幅変調の位相を補正するものである。
このようにしたブラシレスモータにおいては、一つの通
電切り換えから次の通電切り換えまでを一区間として、
各区間におけるモータへの印加電圧を一定にすることが
可能となる。
The invention according to claim 1 of the present invention is a combination of stator windings for detecting a rotor position from an induced voltage generated in the stator winding and energizing from the obtained detection signal. The phase of the pulse width modulation for adjusting the voltage applied to the motor is corrected in synchronism with the time of changing the voltage.
In such a brushless motor, from one energization switching to the next energization switching is one section,
The voltage applied to the motor in each section can be made constant.

【0007】この発明の請求項2に係る発明は、固定子
巻線に生じる誘起電圧から回転子位置を検出し、得られ
た検出信号から通電する固定子巻線の組み合わせを替え
る時点に同期して、モータの印加電圧を調整するパルス
幅変調の位相を補正する時、とくにパルス幅変調パルス
のON状態に同期させたものである。このようにしたブ
ラシレスモータにおいては、通電切り換えにより通電を
切り換えた直後の状態がONから始まるために確実な駆
動力が得られる。
According to the second aspect of the present invention, the rotor position is detected from the induced voltage generated in the stator winding, and the combination of the stator windings to be energized is changed from the obtained detection signal in synchronization with the time. When the phase of the pulse width modulation for adjusting the voltage applied to the motor is corrected, it is synchronized with the ON state of the pulse width modulation pulse. In such a brushless motor, a reliable driving force can be obtained because the state immediately after the energization is switched by energization switching starts from ON.

【0008】この発明の請求項3に係る発明は、固定子
巻線に生じる誘起電圧から回転子位置を検出し、得られ
た検出信号から通電する固定子巻線の組み合わせを替え
る時点に同期して、モータの印加電圧を調整するパルス
幅変調の位相を補正する時、とくにパルス幅変調パルス
のOFF状態に同期させたものである。このようにした
ブラシレスモータにおいては、通電切り換え前もON状
態で終了し、通電切り換え直後もON状態となってON
状態が長くなった時、不都合を生ずるような場合に確実
なOFF状態が得られる。
According to a third aspect of the present invention, the rotor position is detected from the induced voltage generated in the stator winding, and the combination of stator windings to be energized is changed from the obtained detection signal in synchronization with the time. Thus, when the phase of the pulse width modulation for adjusting the voltage applied to the motor is corrected, it is particularly synchronized with the OFF state of the pulse width modulation pulse. In such a brushless motor, it ends in the ON state even before the energization switching, and remains in the ON state immediately after the energization switching.
When the state becomes long, a certain OFF state can be obtained in the case where inconvenience occurs.

【0009】この発明の請求項4に係る発明は、固定子
巻線に生じる誘起電圧から回転子位置を検出し、得られ
た検出信号から通電する固定子巻線の組み合わせを替え
る時点を、モータの印加電圧を調整するパルス幅変調の
位相に同期するように補正するものである。このように
したブラシレスモータにおいては、一つの通電切り換え
から次の通電切り換えまでを一区間として、各区間にお
けるモータへの印加電圧を一定にすることが可能とな
る。またパルス幅変調の位相は変わらないため通電区間
の切り換えに伴うON状態の重なりやOFF状態の重な
りを避けることができる。
According to a fourth aspect of the present invention, the rotor position is detected from the induced voltage generated in the stator winding, and the combination of the stator windings to be energized is changed from the obtained detection signal at the motor The voltage is corrected so as to be synchronized with the phase of pulse width modulation for adjusting the applied voltage. In such a brushless motor, it is possible to make the voltage applied to the motor constant in each section by defining one section from one energization switching to the next energization switching as one section. Further, since the phase of pulse width modulation does not change, it is possible to avoid overlapping of ON states and OFF states due to switching of energization sections.

【0010】この発明の請求項5に係る発明は、固定子
巻線に生じる誘起電圧から回転子位置を検出し、得られ
た検出信号から通電する固定子巻線の組み合わせを替え
る時点を、モータの印加電圧を調整するパルス幅変調の
位相に同期させる時、特にパルス幅変調パルスのON状
態に同期させたものである。このようにしたブラシレス
モータにおいては、通電切り換えにより通電を切り換え
た直後の状態がONから始まるためる確実な駆動力が得
られる。
According to a fifth aspect of the present invention, the rotor position is detected from the induced voltage generated in the stator winding, and the combination of the stator windings to be energized is changed from the obtained detection signal at the motor When the pulse width modulation phase for adjusting the applied voltage is synchronized with the ON state of the pulse width modulation pulse. In such a brushless motor, a reliable driving force can be obtained because the state immediately after switching the energization by the energization switching starts from ON.

【0011】この発明の請求項6に係る発明は、固定子
巻線に生じる誘起電圧から回転子位置を検出し、得られ
た検出信号から通電する固定子巻線の組み合わせを替え
る時点を、モータの印加電圧を調整するパルス幅変調の
位相に同期させる時、特にパルス幅変調パルスのOFF
状態に同期させたものである。このようにしたブラシレ
スモータにおいては、通電切り換えにより通電を切り換
えた直後の状態がOFFから始まるようになる。このこ
とにより通電切り換え前もON状態で終了し、通電切り
換え直後もON状態となってON状態が長くなった時、
不都合を生ずるような場合に確実なOFF状態が得られ
る。
According to a sixth aspect of the present invention, the rotor position is detected from the induced voltage generated in the stator winding, and the combination of the stator windings to be energized is changed from the obtained detection signal at the motor position. When synchronizing with the phase of pulse width modulation that adjusts the applied voltage of
It is synchronized with the state. In such a brushless motor, the state immediately after the energization is switched by energization switching starts from OFF. Due to this, when the energization switching is finished in the ON state, and immediately after the energization switching is also in the ON state, the ON state becomes long,
A reliable OFF state can be obtained when inconvenience occurs.

【0012】[0012]

【発明の実施の形態】図1に本発明の構成ブロック図を
示す。1は交流電源、2は整流回路、3は半導体スイッ
チング回路、4はブラシレスモータ、5は位置検出回
路、6はマイクロプロセッサである。位置検出回路5に
おいてモータの誘起電圧の変化により回転子位置を検出
し、検出された位置信号に基づきマイクロプロセッサ6
において固定子巻線への通電を順次切り替えた信号と、
モータへの印加電圧を調整するパルス幅変調の信号の合
成信号を生成し、半導体スイッチング回路3を制御す
る。
1 is a block diagram showing the configuration of the present invention. 1 is an AC power supply, 2 is a rectifier circuit, 3 is a semiconductor switching circuit, 4 is a brushless motor, 5 is a position detection circuit, and 6 is a microprocessor. The position detection circuit 5 detects the rotor position based on the change in the induced voltage of the motor, and the microprocessor 6 based on the detected position signal.
In the signal at which the energization of the stator winding was sequentially switched,
A composite signal of pulse width modulation signals for adjusting the voltage applied to the motor is generated, and the semiconductor switching circuit 3 is controlled.

【0013】本発明はかかる構成により、固定子巻線に
生じる誘起電圧から回転子位置を検出し、得られた位置
信号から通電する固定子巻線の組み合わせを切り替える
時、モータへの印加電圧を調整するパルス幅変調の位相
を固定子巻線の組み合わせ切り換えタイミングに同期さ
せ、あるいは切り換えタイミングをモータへの印加電圧
を調整するパルス幅変調の位相に同期させる。
According to the present invention, the rotor position is detected from the induced voltage generated in the stator winding, and the voltage applied to the motor is changed when the combination of the stator windings to be energized is switched from the obtained position signal. The phase of the pulse width modulation to be adjusted is synchronized with the combination switching timing of the stator windings, or the switching timing is synchronized with the phase of the pulse width modulation for adjusting the voltage applied to the motor.

【0014】図3〜図6には、本発明によるPWM信号
の発生タイミングと、各モータの相に通電する際の通電
相のタイミングを縦軸に示し、U相、V相、W相各相間
の通電区間を横軸に示している。例えば区間1であれば
U相とW相に通電され、U相からW相に向かって通電さ
れることを示す。区間2であればU相からV相へ、同様
に順次W相からV相へ、W相からU相へ、V相からU相
へ通電されることを示している。次に、モータへの印加
電圧を調整するパルス幅変調の位相と、固定子巻線の組
み合わせ切り換えタイミングとの同期関係についてそれ
ぞれ図に示す。
3 to 6, the vertical axis represents the timing of generation of the PWM signal according to the present invention and the timing of the energized phase when energizing the phases of the respective motors. The energization section of is shown on the horizontal axis. For example, section 1 indicates that the U-phase and the W-phase are energized, and the U-phase is energized toward the W-phase. In the section 2, the U-phase is energized to the V-phase, similarly, the W-phase is sequentially energized to the V-phase, the W-phase is energized to the U-phase, and the V-phase is energized to the U-phase. Next, the synchronous relationship between the phase of pulse width modulation for adjusting the voltage applied to the motor and the combination switching timing of the stator windings is shown in each figure.

【0015】図3ではPWMのタイミングの内、ON状
態の立ち上がりを通電相の切り換えに同期させた場合を
示しており、各区間のPWNのパルス数は等しくなる。
このようにしたブラシレスモータにおいては、通電を切
り換えた直後の状態がONから始まるために確実な駆動
力が得られる。
FIG. 3 shows a case where the rising of the ON state is synchronized with the switching of the energized phase in the PWM timing, and the number of PWN pulses in each section is equal.
In such a brushless motor, the state immediately after switching the energization starts from ON, so that a reliable driving force can be obtained.

【0016】図4ではPWMのタイミングの内ON状態
の立ち下がり(OFF状態の開始)を含めて、パルスの
OFFタイミングの時点を通電相の切り換えに同期させ
た場合を示しており、各区間のPWMのパルス数は等し
くなる。このようにしたブラシレスモータにおいては、
通電切り換え前もON状態で終了し、通電切り換え直後
もON状態となってON状態が長くなった時、不都合を
生ずるような場合に確実なOFF状態が得られる。
FIG. 4 shows a case in which the timing of the pulse OFF timing is synchronized with the switching of the energized phase, including the fall of the ON state (start of the OFF state) within the PWM timing. The number of PWM pulses becomes equal. In such a brushless motor,
A reliable OFF state can be obtained in the case where there is a problem when the ON state ends even before the energization switching and the ON state becomes long immediately after the energization switching as well.

【0017】図5ではPWMのタイミングはそのまま
で、逆に相通電の切り換えをPWMのタイミングの内O
N状態に同期させた場合を示している。このようにした
ブラシレスモータにおいては、通電切り換えにより通電
を切り換えた直後の状態がONから始まるためる確実な
駆動力が得られる。
In FIG. 5, the PWM timing remains the same, and conversely, the switching of the phase energization is switched to O in the PWM timing.
The figure shows the case of synchronizing with the N state. In such a brushless motor, a reliable driving force can be obtained because the state immediately after switching the energization by the energization switching starts from ON.

【0018】図6ではPWMのタイミングはそのまま
で、相通電の切り換えをPWMのタイミングの内OFF
状態に同期させた場合を示している。通電相の切り換え
はPWMの任意の時点に同期させて艮い。このようにし
たブラシレスモータにおいては、通電切り換えにより通
電を切り換えた直後の状態がOFFから始まるようにな
る。このことにより通電切り換え前もON状態で終了
し、通電切り換え直後もON状態となってON状態が長
くなった時、不都合を生ずるような場合に確実なOFF
状態が得られる。
In FIG. 6, the PWM timing remains unchanged, and the switching of the phase energization is turned off within the PWM timing.
It shows the case of synchronizing with the state. The switching of the energized phase should be synchronized with any time of PWM. In such a brushless motor, the state immediately after the energization is switched by energization switching starts from OFF. As a result, even if the energization is switched on, the operation is completed in the ON state, and immediately after energization switching, the ON state is maintained.
The state is obtained.

【0019】[0019]

【発明の効果】以上のように、本発明は固定子巻線に生
じる誘起電圧から回転子位置を検出し、得られた位置信
号から通電する固定子巻線の組み合わせを切り替える
時、モータへの印加電圧を調整するパルス幅変調の位相
を固定子巻線の組み合わせ切り換えタイミングに同期さ
せ、あるいは切り換えタイミングをモータへの印加電圧
を調整するパルス幅変調の位相に同期させることによ
り、従来方法の欠点であった、ブラシレスモータへの印
加電圧を調整するパルス幅変調の位相がモータへの通電
開始時に決定された位相がそのまま継続されて、各通電
区間におけるパルス数に誤差が生じてモータの安定した
運転を阻害することを回避することができる。また、確
実な駆動力や所望の運転状態を実現できる。
As described above, according to the present invention, the rotor position is detected from the induced voltage generated in the stator winding, and when the combination of the stator windings to be energized is switched from the obtained position signal, the motor position is changed. Disadvantages of the conventional method by synchronizing the pulse width modulation phase that adjusts the applied voltage with the combination switching timing of the stator windings, or by synchronizing the switching timing with the pulse width modulation phase that adjusts the applied voltage to the motor The phase of the pulse width modulation that adjusts the voltage applied to the brushless motor was maintained at the phase that was determined at the start of energization of the motor, and an error occurred in the number of pulses in each energization section, stabilizing the motor. It is possible to avoid hindering driving. Moreover, a reliable driving force and a desired operating state can be realized.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係るブラシレスモータの運転制御ブロ
ック図。
FIG. 1 is an operation control block diagram of a brushless motor according to the present invention.

【図2】従来の実施例のPWM信号の発生タイミングお
よび通電相のタイミングと通電区間の関係を示す図。
FIG. 2 is a diagram illustrating a relationship between a PWM signal generation timing, a conduction phase timing, and a conduction section according to a conventional example.

【図3】本発明の実施例のPWM信号の発生タイミング
および通電相のタイミングと通電区間の関係を示す図。
FIG. 3 is a diagram showing a relationship between a PWM signal generation timing and a conduction phase timing and a conduction section according to the embodiment of the present invention.

【図4】本発明の他の実施例のPWM信号の発生タイミ
ングおよび通電相のタイミングと通電区間の関係を示す
図。
FIG. 4 is a diagram showing a relationship between a PWM signal generation timing and a conduction phase timing and a conduction section according to another embodiment of the present invention.

【図5】本発明の他の実施例のPWM信号の発生タイミ
ングおよび通電相のタイミングと通電区間の関係を示す
図。
FIG. 5 is a diagram showing a relationship between a PWM signal generation timing and a conduction phase timing and a conduction section according to another embodiment of the present invention.

【図6】本発明の他の実施例のPWM信号の発生タイミ
ングおよび通電相のタイミングと通電区間の関係を示す
図。
FIG. 6 is a diagram showing a relationship between a PWM signal generation timing and a conduction phase timing and a conduction section according to another embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1・・・交流電源 2・・・整流回路 3・・・半導体スイッチング回路 4・・・ブラシレスモータ 5・・・位置検出回路 6・・・マイクロプロセッサ 1 ... AC power supply 2 ... Rectifier circuit 3 ... Semiconductor switching circuit 4 ... Brushless motor 5 ... Position detection circuit 6 ... Microprocessor

Claims (6)

【特許請求の範囲】[Claims] 【請求項1】 複数極の永久磁石を有する回転子と、通
電時にこの回転子に回転磁界を与えるように配置された
複数の固定子巻線とを有し、この複数の固定子巻線のう
ちの幾つかの固定子巻線に通電して回転磁界を得ると共
に、通電していない固定子巻線に生じる誘起電圧の変化
を検出し、この検出信号を得られた検出時点から適当な
遅延時間を設けて通電する固定子巻線の組み合わせを順
次切り替えるように成したブラシレスモータにおいて、
固定子巻線に生じる誘起電圧から回転子位置を検出し、
得られた位置信号から通電する固定子巻線の組み合わせ
を切り替える時、モータへの印加電圧を調整するパルス
幅変調の位相を固定子巻線の組み合わせ切り換えタイミ
ングに同期させることを特徴とするブラシレスモータの
運転方法。
1. A rotor having a permanent magnet having a plurality of poles, and a plurality of stator windings arranged to give a rotating magnetic field to the rotor when energized. Some of the stator windings are energized to obtain a rotating magnetic field, and changes in the induced voltage that occur in the stator windings that are not energized are detected. In a brushless motor configured to sequentially switch the combination of stator windings that energize for a certain period of time,
The rotor position is detected from the induced voltage generated in the stator winding,
A brushless motor characterized by synchronizing the phase of pulse width modulation for adjusting the voltage applied to the motor with the combination switching timing of the stator windings when switching the combination of the stator windings that are energized from the obtained position signals. Driving method.
【請求項2】 上記同期をパルス幅変調パルスのONタ
イミングで同期させることを特徴とする請求項1に記載
のブラシレスモータの運転方法。
2. The method of operating a brushless motor according to claim 1, wherein the synchronization is synchronized with an ON timing of a pulse width modulation pulse.
【請求項3】 上記同期をパルス幅変調パルスのOFF
タイミングで同期させることを特徴とする請求項1に記
載のブラシレスモータの運転方法。
3. The synchronization is turned off by a pulse width modulation pulse.
The method of operating a brushless motor according to claim 1, wherein the brushless motors are synchronized at timing.
【請求項4】 複数極の永久磁石を有する回転子と、通
電時にこの回転子に回転磁界を与えるように配置された
複数の固定子巻線とを有し、この複数の固定子巻線のう
ちの幾つかの固定子巻線に通電して回転磁界を得ると共
に、通電していない固定子巻線に生じる誘起電圧の変化
を検出し、この検出信号を得られた検出時点から適当な
遅延時間を設けて通電する固定子巻線の組み合わせを順
次切り替えるように成したブラシレスモータにおいて、
固定子巻線に生じる誘起電圧から回転子位置を検出し、
得られた位置信号から通電する固定子巻線の組み合わせ
を切り替える時、切り換えタイミングをモータへの印加
電圧を調整するパルス幅変調の位相に同期させることを
特徴とするブラシレスモータの運転方法。
4. A rotor having a permanent magnet having a plurality of poles, and a plurality of stator windings arranged to give a rotating magnetic field to the rotor when energized. Some of the stator windings are energized to obtain a rotating magnetic field, and changes in the induced voltage that occur in the stator windings that are not energized are detected. In a brushless motor configured to sequentially switch the combination of stator windings that energize for a certain period of time,
The rotor position is detected from the induced voltage generated in the stator winding,
A method for operating a brushless motor, characterized in that, when a combination of stator windings to be energized is switched from the obtained position signal, the switching timing is synchronized with a phase of pulse width modulation for adjusting a voltage applied to the motor.
【請求項5】 上記同期をパルス幅変調パルスのONタ
イミングに同期させることを特徴とする請求項4に記載
のブラシレスモータの運転方法。
5. The method of operating a brushless motor according to claim 4, wherein the synchronization is synchronized with an ON timing of a pulse width modulation pulse.
【請求項6】 上記同期をパルス幅変調パルスのOFF
タイミングに同期させることを特徴とする請求項4に記
載のブラシレスモータの運転方法。
6. The pulse width modulation pulse is turned off by the synchronization.
The method of operating a brushless motor according to claim 4, wherein the operation is synchronized with the timing.
JP7260948A 1995-09-14 1995-09-14 Brushless motor drive method Pending JPH0984383A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7260948A JPH0984383A (en) 1995-09-14 1995-09-14 Brushless motor drive method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7260948A JPH0984383A (en) 1995-09-14 1995-09-14 Brushless motor drive method

Publications (1)

Publication Number Publication Date
JPH0984383A true JPH0984383A (en) 1997-03-28

Family

ID=17355004

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7260948A Pending JPH0984383A (en) 1995-09-14 1995-09-14 Brushless motor drive method

Country Status (1)

Country Link
JP (1) JPH0984383A (en)

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