1. 설계목적
전기기기 및 제어설계 수업에서 배운 내용을 토대로 Simulink를 이용하여 PMSM 속도제어회로를 설계 할 수 있다.
2. 이론
① PMSM
PMSM은 Permanent Magnet Synchronous machine의 약자이다. 직류모터와는 반대로 고정자가 권선이고 회전자는 영구자석으로 되어있다. 고정자에 교류를 인가하여 회전자계
2.3 C-V graph
The measured MOS capacitance (called gate capacitance) varies with the applied gate voltage.
① Measurement of C-V characteristics
-Apply any DC bias, and superimpose a small (15 mV) ac signal
-Generally measured at 1 MHz (high frequency) or at variable frequencies between 1KHz to 1 MHz
-The dc bias VG is slowly varied to get quasi-continuous C-V characteristics
② C-V chara
proportional to the surface area of the conductor plates and inversely proportional to the separation distance between the plates. If the charges on the plates are +Q and −Q, and V gives the voltage between the plates, then the capacitance is given by
C= Q/V
SI unit of capacitance is the farad; 1 farad is 1 coulomb per volt. Capacitance can be calculated if the geometry of the conductors
Controlling aperture size related to the amount of electrons.
As aperture size changes
1. Probe convergence angle
2. Probe current
3. Probe diameter
The portion of a scene that appears acceptably sharp in the image.
Easily speaking, range in focus.
D.O.F is in inverse proportion to
radius of aperture size(RAP) (WD: Working distance)