brushless dc servomotors - FAULHABER - DC Motors & Micro Drive Systems
up to 12 tests per second. Other important requirements for the company's application were maintenance-free operation, a long service life, and user-friendly servicing in order to ensure that the brushless dc servomotors brushless dc servomotors - FAULHABER - DC Motors & Micro Drive Systems testing systems operate smoothly.
Drives for flying probes
– small, light, and powerful
The company ultimately
Hot new autoclavable Brushless DC motors: News from EMS decided in favor of drive solutions from the standard range supplied by micro-motor specialists FAULHABER. The three axes of each
moving test probe feature brushless brushless dc servomotors servo drives from Series 1628. The rare-earth magnet of the rotor and the
Faulhaber skew winding provide these motors with a high level
of dynamic response and power in a
relatively small space. At rotary speeds of up to 40,000 rpm, an output power of 11 W, and a torque brushless dc servomotors of 2.6 mNm
these drives, which have a diameter of 16 mm, are a mere 28 mm long and weigh only approx. 30 g. A finely laminated core minimizes losses brushless dc servomotors due to eddy currents in the stator. The efficiency of the drives is therefore comparatively high at approx. 70%.
The drives brushless dc servomotors operate with virtually no wear; their service life is only ever restricted by the service life of the ball bearings and electronic components used. If the motor is operated at brushless dc servomotors the figures recommended on the data sheet, service life can be expected to reach over 10,000 operating hours on average. The speed reduction required for the application is provided by a spindle directly attached to the drive.
Magnetic pulse encoder with small footprint
Knowing the actual position of the motors is an essential prerequisite for precision positioning. Here, too, the manufacturer's "set of modules" provided the perfect solution. In the axis positioning systems used on the Flying Scorpion the current positions are detected at each motor by a magnetic pulse encoder that emits 256 pulses per revolution. The pulse encoders are comprised of a magnetic annular gear attached to the rotor and a hybrid circuit. The sensor integrated into the hybrid circuit converts the magnetic field differences between the top land and the root of the tooth into electrical signals that are processed by an integrated circuit. At the outputs there are then two phase quadrature rectangular-pulse signals available, which are then processed by the system control of the flying probes.
The simply designed, robust pulse encoders are extremely compact and can be directly mounted on the motor. They are fitted to the free end of the motor shaft and fixed with three screws. They only extend the drive by approx. 10 mm. In the application described, the connections between the pulse encoder and the motor are routed in a common ribbon cable, which simplifies electrical connection considerably.
Mechanical assembly is also simple and practical. All that has to be done is to attach the complete drive units to the shaft with three screws at each point.
FAULHABER motion control technology therefore represents a key component in the new testing systems that use
- miniature dc motor
- stepper motors
- coreless
- miniature drive system
- micro motors
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