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| International Rectifier PD 6.090 PRELIMINARY LRPT5051A POWIRTRAIN TM Integrated Power Stage for 15 hp Motor Drives 15 hp (11 kW) power output 380 - 480V AC; 50/60Hz 3-phase rectifier bridge 3-phase short circuit rated ultrafast IGBT inverter HEXFREDTM UltraFastTM soft recovery free-wheeling diode NTC temperature sensor Pin-to-base plate isolation 2500V rms Easy-to-mount package Case temperature range -25C to 125C operational Figure 1. IRPT5051A Power Assembly IRPT5051 C POWIRTRAIN isolated PWM signals l----------- feedback ------feedback processing isolated pow er supply PWM signal generator 4 keyboard i I External Control Functions Figure 2. The Power Assembly and POWIRTRAIN within a motor control system Revised 3/5/97 IRPT5051A Description The IRPT5051 A Power Assembly The IRPT50 51A power assembly (figure 1) consists of input rectifiers, an NTC thermistor, an output inverter and connectors, all mounted on an Insulated Metal Substrate (IMS). The input side employs 16OOV SMD-220 rectifier diodes, while the inverter section employs SMD-10 surface-mount 12OOV short-circuit-rated IGBT co-pack switches. The NTC thermistor mounted near the inverter provides temperature sensing capability. The lead spacing on the power assembly meet UL840 pollution level 2 requirements. The power circuit and layout are carefully designed to minimize inductance on the power path, to reduce noise during inverter operation and to improve inverter efficiency. The driver board required to run the inverter can be interfaced to the power assembly through solder pins thus minimizing assembly and alignment effort. The power assembly is designed to be mounted to a heat sink with five screw mount positions (one in each corner and a fifth near the center) in order to insure good thermal contact between the IMS and the heat sink. International Rectifier POWIRTRAIN and Design Kit The IRPT505lC (figure 3) provides the complete power conversion function for a 15hp (1lkW) variable voltage, variable frequency AC motor controller. The POWIRTRAIN combines the Power Assembly (IRPT505lA) with a Driver-Plus Board (IRPT5051D) as shown in the block diagram, figure 2. The Design Kit includes the following: complete POWIRTRAIN integrated power stage specifications and operating instructions bill of materials electrical schematic mechanical layouts software transferrable file for easy design integration application information and layout considerations l l l l l l l Figure 3. IRPT505 1C |
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