臺灣博碩士論文加值系統

本論文主旨在探討無轉軸偵位元件無刷直流馬達( 反電動勢為梯形型式
)之伺服運轉控制. 包括馬達啟動, 定速運轉, 以及煞車定位的方法. 控
制系統以微處理機做所需軟體規劃, 配合少量硬體實現之.馬達由靜止可
依設定斜率做加速啟動, 利用馬達定子端電壓偵測轉子之位置以提供換向
之正確時序, 馬達運轉的速度以波寬調變改變輸至馬達平均電壓調整之.
實驗證明, 馬達於定速運轉時外加負載, 只需極短時間即可完成速度調
整, 且幾無超越量.另外, 本文亦嚐試一種無須外加硬體電路, 僅靠軟體
控制, 應用磁場導向原理, 俾使馬達轉子快速定位的方法. 由實驗證明,
馬達於一對極內做正確的定位.

The servo control of a brushless DC motor without the shaft
position sensor that the back electromotive force is
trapezoidal is discussed in this thesis. It contains the
motor starting procedure, steady-state drive, and position
control method. The implementation of this system is made by
the software which is based on the microprocessor and a few
hardware. The motor starts and accelerates at stand still
according to a set slope. The rotor position is determined
by the terminal voltage, and then offer the motor
commutation sequence. The motor speed is adjusted by the
average motor voltage just like the chopper control of a DC
motor. The experimental result show that it just need a
short dulation to reach the speed command when a load is added
to the motor. Also, a brief field-orientation control method
for the rotor to stop at the desire position without adding any
other hardware is presented. It can be shown that the rotor
will stop at the exact position in a pair of N-S pole.