Tuesday, June 20, 2006
Smart Power Modules suit low-power appliance motor drives
Rated from 50 W to 3 kW, Motion-SPM(TM) 500 V multi-chip Models FSB50250 and FSB50450 each combine 6 fast recovery MOSFET's and 3 half-bridge high-voltage ICs in one thermally efficient, Tiny-DIP package designed for BLDC motors with built-in control. Gate-driver ICs offer high-isolation, 5 V CMOS/TTL interface and under-voltage lockout protection. High-speed level-shifting function permits operation from single power supply voltage, eliminating need for opto-isolation.
Fairchild's SPM portfolio is the industry's most comprehensive line-up of power modules--50 W to 3 kW--for inverter motors
South Portland, Maine-June 8, 2005-Fairchild Semiconductor's (NYSE: FCS) Motion-Smart Power Modules (SPM(TM)) offer a highly integrated solution for low-power (below 100 W), brushless dc (BLDC) motor applications. The Motion-SPM devices integrate multiple functions in a single compact package, offering a simplified motor drive solution to speed engineering design, reduce PC board space and enable energy-efficient and reliable designs in home appliances. Motion-SPM multi-chip modules combine six fast recovery MOSFETs (FRFET(TM)) and three half-bridge high-voltage ICs (HVIC) in one thermally efficient, ultra-compact (29 mm x 12 mm) Tiny-DIP package designed for BLDC motors with built-in control.
"The low-power appliance market is selecting high-voltage brushless dc (BLDC) motors over single-phase AC induction motors, due to their increased efficiency (from 50 to 90%), decreased acoustic noise and vibration, and higher power density per volume and weight. Fairchild's Motion-SPMs make it possible to build the motor control into the BLDC assembly," said Taehoon Kim, vice president of Fairchild's High-Power product line. "By integrating power analog and power discrete IC functionality into a single package, the SPM represents how Fairchild understands--and meets--the thermal efficiency, reliability and board space demands of the home appliance market. In addition to offering advantages over non-integrated solutions, the new Motion-SPM series makes Fairchild's SPM portfolio the industry's most comprehensive line-up of power modules covering inverter motors used in a full range of 50 W to 3 kW appliances."
Digital Servo Drive controls resolver-based ac motors
Used with brushless rotary servomotors, MicroFlex resolver input model utilizes DSP technology and resolver-to-digital-converter IC. Performance is optimized via software-configurable anti-resonance filters, and space vector modulation techniques control IGBT power devices. Able to operate in torque or velocity control mode, drive uses sinusoidal, resolver-based commutation and features simulated encoder output. Unit is offered with 3, 6, and 9 A continuous power ratings.
o cost-effective performance upgrade for existing motor installations
o all-digital DSP-based drive technology facilitates optimal set-up
Fort Smith, AR, June 27, 2005 --- Baldor has extended its MicroFlex family of low-cost digital servo drives with the launch of a new model for use with brushless rotary AC servomotors utilizing resolver feedback. The drive provides users with a cost-effective means of increasing the speed and smoothness of existing automation through the application of advanced digital control technology, without having to replace the servomotor. It is also likely to prove popular with OEMs and machine builders designing servo-based systems for use in challenging environments, as resolvers are generally considered more mechanically and electrically robust than encoders, especially at elevated temperatures.
MicroFlex servo drives are all-digital control solutions, using DSP (digital signal processor) technology to maximize performance and minimize cost. The new resolver input model uses a resolver-to-digital-converter (RDC) IC to convert the analog motor feedback signal into digital data immediately prior to processing. The drive's DSP enables users to optimize system performance via software-configurable anti-resonance filters. Instead of employing 'soft' servo loop gains to eliminate noise and vibration by de-tuning the system - which is a compromise often faced when retrofitting a drive to an existing installation - users can set up the filters to optimize dynamic performance and minimize settling times.
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