Recently, I got the chance to work with Eric Rice and Jeff Kordick at OYOSTEPPER Products on a technical feature detailing new technologies making step motor systems even faster, quieter, and more energy-efficient than ever before.
Step motor systems have come a long way from the early days of voltage drives and full stepping. First came PWM drives and microstepping and then digital signal processors (DSPs) and anti-resonance algorithms. Now, closed-loop stepper designs could become the new cornerstone of the motion control industry. One such closed-loop system implements on an integrated motor design that includes a feedback device, driver and controller boards, power, communication and I/O electronics, and system connectors on the motor’s side and back.
Consider how open-loop stepper systems are simple beasts. One simply sets the drive for the motor’s rated current and the drive will do its best to supply that current to the motor at all times, whether the resulting torque is needed or not. This often causes the generation of heat instead of energy towards the application function — and is the reason why open-loop stepper systems typically run hotter than closed-loop counterparts .
Above is a Relative Comparison Chart for StepSERVO closed-loop systems versus open-loop systems. Note the superior performance of the closed-loop stepper motor system as demonstrated in the results of laboratory testing that compare two systems for acceleration (torque), efficiency (power consumption), position error (accuracy), heat generation, and noise levels.
Step motor systems have come a long way from the early days of voltage drives and full stepping. First came PWM drives and microstepping and then digital signal processors (DSPs) and anti-resonance algorithms. Now, closed-loop stepper designs could become the new cornerstone of the motion control industry. One such closed-loop system implements on an integrated motor design that includes a feedback device, driver and controller boards, power, communication and I/O electronics, and system connectors on the motor’s side and back.
Consider how open-loop stepper systems are simple beasts. One simply sets the drive for the motor’s rated current and the drive will do its best to supply that current to the motor at all times, whether the resulting torque is needed or not. This often causes the generation of heat instead of energy towards the application function — and is the reason why open-loop stepper systems typically run hotter than closed-loop counterparts .
Above is a Relative Comparison Chart for StepSERVO closed-loop systems versus open-loop systems. Note the superior performance of the closed-loop stepper motor system as demonstrated in the results of laboratory testing that compare two systems for acceleration (torque), efficiency (power consumption), position error (accuracy), heat generation, and noise levels.
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