IRPT2055

The IRPT2055C provides the complete power conversion function for a 1.5hp (1.1kW) variable-frequency, variable-voltage, AC motor controller. The combines a power assembly IRPT2055A with a Driver-Plus Board IRPT2055D. Figure 1 shows the block diagram of the within an AC motor control system.

The power module contains a 3-phase input bridge rectifier, brake IGBT and diode, 3-phase IGBT inverter, current sense shunts, and a thermistor. The IRPT2055 is designed for easy mounting to a heat sink.

The Driver-Plus Board contains DC link capacitors, capacitor 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. The IRPT2055 is designed 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 resistor.

Output power is Pulse-Width Modulated (PWM), 3-phase, variable-frequency, variable voltage controlled by an externallygenerated user-provided PWM controller for inverter IGBT switching. The power supply offers the user non-isolated 5V and 5V to power the microcontroller.