IRPT2051A International Rectifier Corp., IRPT2051A Datasheet - Page 2

• Manufacturer Part Number: IRPT2051A
• Manufacturer: International Rectifier Corp.

System Description
power conversion function for a 3hp (2.2kW) variable-frequency,
variable-voltage, AC motor controller. The
combines a power assembly IRPT2051A with a Driver-Plus
Board IRPT2051D. Figure 1 shows the block diagram of the
phase IGBT and diode, 3-phase IGBT inverter, current sense
shunts, and a thermistor. It is designed for easy mounting to a
heat sink.
soft charge function using NTC thermistor, surge suppression
MOVs, IGBT gate drivers, DC bus voltage and current feedback
signals, protection circuitry and local power supply. It is de-
signed to mate with a controller board through a single row
header. Terminal blocks are also provided on the Driver-Plus
Board for all end-user line input, motor output, and brake resis-
tor.
variable-frequency, variable voltage controlled by an externally-
generated user-provided PWM controller for inverter IGBT
switching. The power supply offers the user non-isolated 5V and
15V to power the microcontroller.
turer as listed below:
IRPT2051
page 2
The IRPT2051C
The power module contains a 3-phase input bridge rectifier, 3-
The Driver-Plus Board contains DC link capacitors, capacitor
Output power is Pulse-Width Modulated (PWM), 3-phase,
The IRPT2051C offers several benefits to the drive manufac-
• It eliminates component selection, design layout, intercon-
• Gate drive and protection circuits are designed to closely
• It reduces the effort of calculating and evaluating power
• It reduces the manufacturer's part inventory and simplifies
nection, gate drive, local power supply, thermal sensing,
current sensing, and protection.
match the operating characteristics of the power semicon-
ductors. This allows power losses to be minimized and
power rating to be maximized to a greater extent than is
possible by designing with individual components.
semiconductor losses and junction temperature.
assembly.
[
system input and output voltage and current, power losses
and heat sink requirements over a range of operating con-
ditions.
in final testing.]
within an AC motor control system.
specifications and ratings are given for
system ratings are verified by IR
provides the complete
The IRPT2051A Power Module
and wire epoxy-encapsulated module. It houses input rectifiers,
brake IGBT and freewheeling diode, output inverter, current
sense shunts and NTC thermistor. The 3-phase input bridge
rectifiers are rated at 1600V. The brake circuit uses 1200V
IGBT and free-wheeling diode. The inverter section employs
1200V, short circuit rates, ultrafast IGBTs and ultrafast free-
wheeling diodes. Current sensing is achieved through 25 m
low-inductance shunts provided in the positive and negative
DC bus rail. The NTC thermistor provides temperature sensing
capability. The lead spacing on the power modulemeets UL840
pollution level 3 requirements.
designed to minimize inductance in the power path, to reduce
noise during inverter operation and to improve the inverter effi-
ciency. The Driver-Plus Board required to run the inverter can
be soldered to the power module pins, thus minimizing assembly
and alignment. The power module is designed to be mounted to
a heat sink with two screw mount positions, in order to insure
good thermal contact between the module substrate and the heat
sink.
The IRPT2051A power module, shown in figure 2, is a chip
The power circuit and layout within the module are carefully
Figure 2. IRPT2051A Power Module