ACT5101-1 データシートの表示（PDF） - Aeroflex Corporation

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ACT5101-1

HIGH VOLTAGE 3-PHASE BRUSHLESS DC MOTOR DRIVE

Aeroflex Corporation 

At a run condition each transistor will be on for 120 degrees; then

Pc = δS ⋅ δPWM ⋅ VCE ⋅ IC

Pc = 0.33 ⋅ 1.6 ⋅ 30

Pc = 15.8 W

δS = 0.33

δPWM = 1

VCE = 1.6 V

IC = 30 A

Ps

=

δS

⋅

[Eon

+

Eoff]

⋅

fo

⋅

-I--C--

40

Eon = 0.004 J

Eoff = 0.006 J

fo = 20000 Hz

Ps

=

0.33 ⋅ [0.004 + 0.006] ⋅ 20000 ⋅ 3---0--

40

Ps = 49.5 W

TjIGBT = [Pc + Ps] ⋅ θjcIGBT + TC

θjcIGBT = 0.45°C/W

TC = 85° C

TjIGBT = [15.8 + 49.5] ⋅ 0.45° + 85°

TjIGBT = 114.4° C

Maximum hybrid dissipation is:

PHYBRID = 6[Ps + Pc]

PHYBRID = 6[49.5 + 15.8]

PHYBRID = 391.8 W

Aeroflex Circuit Technology

9

SCD5101-1 REV D 5/14/01 Plainview NY (516) 694-6700

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