Sensorless Motor Control works with variable-speed pumps.
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Press Release Summary:
Designed for applications up to 300 W, iMOTION(TM) integrated design platform consists of IRMCF371 mixed-signal control IC, IRAMS06UP60B intelligent power module for power stage, as well as algorithms, development software, and design tools. Platform also includes IRMCF371, which integrates all control and analog interface functions required for sensorless sinusoidal control of permanent magnet synchronous motors using dc link current measurements.
Original Press Release:
IR's Sensorless Motor Control Platform for Variable-Speed Pumps Enables 50 Percent Reduction in Energy Consumption
EL SEGUNDO, CA., November 2006 - International Rectifier, IR® (NYSE: IRF), a world leader in power management technology, today introduced a sensorless sinusoidal motor control platform that delivers quieter operation and higher efficiency for variable-speed pump applications up to 300W. By effectively controlling pump operation over a wide range of flow requirements, variable-speed pumps can cut energy consumption by up to 50 percent.
The latest iMOTION(TM) integrated design platform consists of a mixed-signal controller, the IRMCF371, and companion intelligent power module for the power stage, as well as algorithms, development software, and design tools. "Because variable-speed motor-driven pumps halve energy requirements, government legislation in many countries is driving the adoption of energy-efficient intelligent pumps, particularly in the water, waste-water, and building automation segments," said David Tam, vice president of International Rectifier's Energy-Saving Products. "The iMOTION platform achieves higher reliability and system performance by better controlling system load changes, improving control pump operations, and providing control over a wide range of load conditions as well as enabling smooth start-up conditions," he added.
Mixed Signal Control
The IRMCF371 mixed-signal control IC for pumps integrates all the control and analog interface functions required for sensorless sinusoidal control of permanent magnet synchronous motors (PMS) using DC link current measurements. Analog functions on the IC include differential amplifier, dual sample and hold circuits, and a 12-bit A/D converter to sample the low-voltage signal across the DC link shunt. The IRMCF371 incorporates IR's patented Motion Control Engine (MCE(TM)), an algorithm editor that eliminates coding. An integrated 60MIPS, 8-bit, 8051 microcontroller enables application layer software development, operating independently from the MCE, and does not compete for system resources such as interrupts or internal registers. The embedded Analog Signal Engine (ASE(TM)) integrates all the signal conditioning and conversion circuits required for single current shunt, sensorless control of a PMS motor.
Power Stage
The IRAMS06UP60B is a compact, intelligent power module optimized for electronic motor control in appliance applications that features a three-phase inverter with IC driver in a compact single in-line (SIP1) package. The device includes a shutdown function and over-current protection for safe operation. Other built-in functions include current feedback via dedicated internal shunt resistors and a temperature sensing device.
Design Tools
Design tools include communications software running on the 8051 microcontroller that gives the PC-based MCEDesigner(TM) software access to the control parameters and system variables in the shared memory. This allows modification of the controller set points and control loop gains and other constants without needing to modify or compile software.
Data sheets and application notes are available on the International Rectifier Web site, www.irf.com.
Specifications
Part Package Motor Analog Memory I/O Comms
Number control
IRMCF371 QFP48 (1) motor, 12-bit A/D, 48kB program (6) digital RS232I2C/SPI
extra I/O, (4) channels, RAM, I/O,
and analog POR, 8kB Data RAM (1) capture,
for system UVLO, (4) timers
functions analog
watchdog
timer
Part Number Current Rating VCES Speed Temp Configuration Package
@ Tc=80°C [V] Protection
IRAMS06UP60B 3A 600 <20kHz Yes Shunt on Neg SIP1
Bus
Availability and Pricing
The new iMOTION integrated design platform for pumps is being sampled to qualified users. The platform costs US $12.95 per unit in 10,000-unit quantities. Prices are subject to change. The devices are RoHS compliant. Contact your local International Rectifier sales representative or the International Rectifier Technical Assistance Center (TAC) at tac.irf.com for more details.
About iMOTION
International Rectifier's iMOTION integrated design platform consists of a development system, mixed-signal analog chip sets and power stages, which when co-designed together, simplify motion control designs and bring energy-efficient, cost-effective solutions to market faster. More details on the iMOTION platform, as well as links to design assistance, are posted on the iMOTION Web page at www.irf.com/product-info/imotion/.
About International Rectifier
International Rectifier (NYSE:IRF) is a world leader in power management technology. IR's analog and mixed signal ICs, advanced circuit devices, integrated power systems and components enable high performance computing and reduce energy waste from motors, the world's single largest consumer of electricity. Leading manufacturers of computers, energy efficient appliances, lighting, automobiles, satellites, aircraft and defense systems rely on IR's power management benchmarks to power their next generation products. For more information, go to www.irf.com.
Trademark Notice
ASE(TM), iMOTION(TM), IR®, MCE(TM) and MCEDesigner(TM) are trademarks of International Rectifier Corporation. All other product names noted herein may be trademarks of their respective holders.
