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PWM (Pulse Width Modulation)PWM

PWMPWM PWM PWM

VD 1PWM1 PWM-VT

VD 1PWM1 PWM-VT

VD UsCVT Ug1PWM1 PWM-VT

1PWM1 VT ()Ug

1PWM1 VT ()Ug

1PWM1 T 0 t < tonUgVTVT ton t < T UgVTVD

1PWM1 T 0 t < tonUgVTVT ton t < T UgVTVD

1PWM

1PWM

1PWM

1PWM PWM

VT1 + id VT2 id Ud 1PWM2

1PWM 2 VT1

1PWM 2 VT1

1PWM 2 ()

1PWM tonVT10 t ton Ug1VT1 Ug2VT2Us id

1PWM ton < t T Ug1Ug2VT1VT2idVD2VD2VT2 VT1VD2

1PWM ton < t T Ug1Ug2VT1VT2idVD2VD2VT2 VT1VD2

1PWM

1PWM

1PWM 1VD1 id 2VT1 id

1PWM 3VD2 id 4VT2 id

1PWM 3VD2 id 4VT2 id

1PWM 14 23

1PWM 14 23

1PWM VT2

1PWM VT2

1PWM

1PWM

1PWM 0 t ton VT2 id VD1 VD1 VT1

1PWM ton t T Ug2 VT2 id VT2VD1VT1

1PWM ton t T Ug2 VT2 id VT2VD1VT1

1. PWM: : = ton / T PWM 0 < 1 Ud = Ud / UsPWM PWM =

PWMPWMPWM 1.PWM2.PWM

2.PWM PWMH M

2.PWM PWMPWM PWMPWM

2.PWM PWMPWM

2.PWM 1 Ug1=-Ug2 12

2.PWM 1 1 234

2.PWM1 () 1 0 t ton Ug1 Ug4 VT1 VT4 Ug2 Ug3VT2 VT3 id 1()MUAB = +Us 1

2. PWM1 () 2ton t T Ug1 Ug4 VT1 VT4 VD2 VD3 VT2 VT3 id 2()MUAB = Us 12

2. PWM1 ()

2. PWM 1 () 34

2. PWM 1 PWM

= 2 1 =

2. PWM 1 PWM

=

2.PWM 1 ton 0 ton T 0~11

2. PWM 1

2. PWM 1 () PWM1:20000

2.PWM 1 () 4

2.PWM2 PWM T

2.PWM2 PWM

2. PWM2Ug4 Ug3VT1 VT2

2. PWM 2 Ug4 Ug3VT1 VT2

2. PWM 2 Ug4 Ug3VT1 VT2

2. PWM 2) Ug4 Ug3VT1 VT2

1. PWMPWM

1. PWMPWM

1.

PWMPWM

PWMPWM

1.

PWMPWM

PWMPWM

2. PWM

2. PWM

2.

TS T 20kHz T = 0.05ms

PWMR

1.PWMR ACRUctPWMUct (1) (2) (3) (4)

1.PWMR PWMSG152525253525PWMSG1731SG 2731SG 3731 10K~350KHzSG1731 55~+125 SG 2731 25~+85 SG 3731 0~+70 PWM

1.PWMRPWMR H

1.PWMRPWMR H

1.PWMR PWMR

1.PWMR PWMR

1.PWMR PWMR

P247411