臺灣博碩士論文加值系統

本研究是針對徑向氣隙型無刷直流馬達進行無感測器設計與轉速 相迴路
控制(Phase-Lock-Loop Control)。無刷直流馬達之運轉仰賴 子位置感測
器，得知轉子磁極位置以產生適當換相訊號。此外並需n轉速感測器構成
速度迴授迴路。本研究的第一部份是設計無感測器迉X法則，以取代這兩
種感測器；第二部份則是針對設計完成的無感馱⑹邦F進行數位式鎖相
迴路控制。在本文的第一部份，先提出一穩定簡便的無感測器方式，檢出
馬F轉子的磁極位置，使得無刷直流馬達在無霍爾元件的狀態下依然能蕭T
運轉。再進一步對轉速檢出器提出一種無刷直流馬達轉速檢出方k，利用
馬達三相線圈的換相訊號，產生FG數為12的脈波，提供控制僎i行轉速控
制。本文的第二部份是對設計完成的無感測器無刷直流邦F進行數位式鎖
相迴路(DPLL)轉速控制，DPLL控制器包含AFC與APC滼‘驉A其中以AFC控制
器降低馬達的上升時間，以APC控制器改善轉t變動率。

The thesis forcuses on sensorless design and speedontrol of
brushless DC motor. The operation of brushless DCotor relies on
position sensors to detect the rotor magneticole position, and
then the proper commutation signal can bebtained. Besides, the
speed sensor is needed to constituteor speed feedback loop. The
first part of the thesis is totudy the sensorless algorithm to
replace position and speedensors of motor. The second part is
to apply digital phase-ock loop (DPLL) control algorithm for
the sensorlessrushless DC motor. First, a steady, simple
algorithm for position sensorlesss proposed to detect rotor
magnetic pole position. So thathe Brushless DC motor can
operate correctly without Hallensors. Then a speed sensorless
method is suggested for arushless DC motor in order to replace
the FG sensor whichs widely used in brushless DC motor. The
speed sensorlessethod uses three phase commutation signal of
motor toenerate a square wave, a FG-like wave, which can be
treateds a FG sensor with 12 pulses each motor mechanical
period.he FG-like wave is used to give speed feedback signal
forpeed control. Second, a digital phase lock loop speed
controller issed for the full-sensorless brushless DC motor. A
DPLLontroller constitutes automatic frequency controller (AFC)
nd automatic phase controller (APC). AFC is used to decreaseise
time of motor speed, and APC is used to improve speedluctuation
of motor.