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IRPT1059 Datasheet(PDF) 2 Page - International Rectifier |
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IRPT1059 Datasheet(HTML) 2 Page - International Rectifier |
2 / 12 page IRPT1059 page 2 www.irf.com The IRPT1059C provides the complete conversion function for a 1hp (0.75kW) variable frequency, variable voltage, AC motor controller. The combines a power module IRPT1059A with a Driver-Plus Board IRPT1059D. Figure 1 shows the block diagram of the within an AC motor control system. The power module contains a single-phase input bridge rectifier, 3-phase IGBT inverter, current sense shunts, and a thermistor. It 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 MOV, IGBT gate drivers, DC bus voltage and current feedback signals, protection circuitry and local power supply. It is designed to mate with a controller board through a single row header. Terminal blocks are provided on the Driver-Plus Board for all end user line input and motor output. Output power is Pulse-Width Modulated (PWM) 3-phase, 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 micro-controller. The IRPT1059C offers several benefits to the drive manufacturer listed below: • It greatly simplifies component selection, design of layout, interconnection, gate drive, local power supply, thermal sensing, current sensing and protection. • Gate drive and protection circuits are designed to closely match the operating characteristics of the power semiconductors. 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. • It reduces the effort of calculating and evaluating power semiconductor losses and junction temperature. • It reduces the manufacturer's part inventory and simplifies assembly. [ specifications and ratings are given for system input and output voltage and current, power losses and heat sink requirements over a range of operating conditions. system ratings are verified by IR in final testing.] The IRPT1059A Power Module The IRPT1059A Power Module, shown in figure 2, is a chip and wire epoxy encapsulated module. It houses input rectifiers output inverter, current sense shunts and NTC thermistor. The single-phase input bridge rectifiers are rated at 800V. The inverter section employs 600V, short circuit rated, ultrafast IGBTs and ultrafast freewheeling diodes. Current sensing is achieved through 45m Ω 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 module meets UL840 pollution level 3 requirements. The power circuit and layout within the module are carefully designed to minimize inductance in the power path, to reduce noise during inverter operation and to improve the inverter efficiency. 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. System Description Figure 2. IRPT1059A Power Module |
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