Motor

Same Sky has created an absolute encoder family for motor shafts from 9 to 15.875mm (5/8inch). Called AMT25 and said to be accurate to ±0.2°, the family relies on the same in-house capacitive ASIC for sensing as all of its AMT series encoders, which is claimed to resist environmental particulates. Outputs options are 12 or 14bit, both over a bi-directional ...

Not known for making microcontrollers, Allegro Microsystems has picked a 40MHz Arm Cortex-M4 as the processing heart of a series of stand-alone three-phase automotive brushless motor driver ICs for rails up to 90V. The parts are: 60V motor, 5.0V I/O, 252kbyte flash A89211GEVSR 60V motor, 3.3V I/O, 128kbyte flash A89211GEVSR-A 90V motor, 5.0V I/O,  252kbyte flash A89212GEVSR 90V motor, 3.3V ...

Some sort of sane no-volt release and emergency stop needs to be applied to the cnc lathe project (when time allows….) And before that time is available, so thought has to go into what arrangement is acceptable. Find more cnc lathe project blogs here It seems a shame to cut too many more new holes in the front, and certainly ...

At last, some ‘spare’ time this weekend, and I learned two things about SCR dc motor control: Permanent magnet dc motors need a chunky inductor in series with them if they are fed from an SCR (thyristor) based mains power controller. It is (probably!) possible to safely interface an Arduino to such an SCR controller. This was the result of ...

Allegro MicroSystems today announced three ICs: two analogue current sensors and a motor driver for fans. The first current sensor, ACS37630, is designed to be sat on top of a bus bar and partly surrounded by a U-core magnetic field concentrator. “Its vertical Hall technology enables sensing parallel to the package surface, ideal for system integration with U-core magnets,” according ...

Nanotec has introduced a series of frame-less brush-less dc motors – essentially a stator-plus-rotor kit intended to be installed directly into a physical structure that will provide support, alignment and bearings. “By eliminating the need for couplings or additional mounting components, these frame-less motors reduce material usage and assembly costs,” claimed the company. “The design also simplifies cable management and ...

Maxon has launched a range of back-drivable electromechanical joints for humanoid, quadruped and other mobile autonomous robots. The larger HEJ 90 (pictured) is aimed at locomotion, and generates up to 140Nm of torque, customisable up to 180Nm. Maximum joint velocity is 13rad/s. Mechanically, it is 110mm in diameter, 90mm long and weighs 1.96kg. Operation is from 30 to 60V. HEJ ...

Power Integrations added high-temperature motor drive optimisation to its MotorXpert brushless dc motor software suite. “In this version 3.0 release, we have added a two-phase modulation scheme, which is ideal for applications that work in high temperature environments such as hot-water circulation pumps,” said company marketing manager Cristian Ionescu-Catrina. “Version 3.0 also features a five-fold improvement to our waveform visualisation tool ...

EPC is specifically aiming at designers of humanoid robots with its EPC91104 7A 48V brushless dc motor driver evaluation board, built around GaN power transistors. Measuring 72 x 75mm and operating across 14 to 80V with peaks up to 20A, it implements only the power stage, needing a separate signal generator board to work, as well as heatsinking. The company ...

EPC has introduced an evaluation board implementing a 40Arms (60A peak) three-phase inverter that will run from 30V to 130V. Called EPC91200, it is “suitable for 80  and 110V battery systems commonly used in industrial automation, agricultural machinery and material handling equipment like forklifts,” according to the company. The inverter is designed around EPC’s 150V 3mΩ EPC2305 GaN HEMT, a ...