维修手册
专案名称：
AxpertVM1KW/VM2KW
专案编号：
S1701112
修订版次：
00 PAGE 10/30
V-RDP-004-73 A
3.3 DC to AC Inverter (full-bridge)
The Inverter circuit (Figure 3.3) and PWM control are only active under battery mode. The Inverter circuit
of Axpert series is based on a full-bridge circuitry and its output is driven by photo-couplers. The
photo-couplers are capable to drive high energy and high speed power of MOSFET and IGBT with
independent high and low referenced output channels.
To construct a high frequency PWM inverter, the drivers receive switching signals from PWM generation
circuit through a pair of photo-couplers to trigger the upper IGBT and the lower IGBT alternately. The
output of IGBT is filtered by an LC circuit to reduce the O/P voltage harmonics distortion.
Figure 3.3 Full-bridge topology
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