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Closed-Loop Stepper Motors

closed-loop stepper motor with encoder
Highlights

NEMA 17 to 34 Frame Size, 2 & 3 Phase

Holding Torque From 0.4Nm to 12.0Nm

Closed Loop for Position Error Correction

Integrated 1,000-line Encoders, Custom Res. Optional

No Wave Spring Inside, Negligible Shaft Axial Play

High Precision, Smooth Movement, Low Noise & Heating

  • Introduction
  • Typical Applications
  • Part Number
  • Downloads

PrimoPal's PHS series hybrid servo motors offer an alternative for applications requiring high performance and high reliability when the servo system is the only choice, while it remains cost-effective. The internal encoder is used to close the position, velocity and current loops in real time, just like the servo system. It combines the best of servo and stepper motor technologies, and delivers unique capabilities and enhancements over both, while at a fraction of the cost of a servo system.
The PHS series hybrid servo motors are currently available from NEMA 17 to NEMA 34 with holding torque from 0.4 Nm to 12.0 Nm. All these hybrid servo motors are integrated with 2-channel and 1,000-line optical incremental encoders. Moreover, custom winding, motor length, shaft, encoder resolution and other mechanical modifications are also available.

Advantages of the PHS Series hybrid servo motors

  Compared to conventional stepper motors   Compared to conventional servo motors

  • Closed-loop, eliminates loss of synchronization
  • Broader operating range, higher torque and higher speed
  • Reduced motor heating and more efficient
  • Smooth motion and super-low motor noise
  • Do not need a high torque margin
  • No wave spring inside, negligible shaft axial play

  • No tuning and always stable
  • Quick response, no delay and almost no settling time
  • No hunting or no inherent dither
  • High torque at starting and low speed, high stiffness at standstill
  • Lower cost

PrimoPal's PHS series hybrid servo motors offer an alternative for applications requiring high performance and high reliability when the servo system is the only choice, while it remains cost-effective. Its great feature of fast response and no hunting makes it the ideal solution for applications such as bonding and vision systems in which rapid motions with a short distance are required and hunting would be a problem. And it is also the ideal solution for applications where the equipment uses a belt-drive mechanism or has low rigidity and you don’t want it to vibrate when stopping.

hybrid servo closed-loop stepper motor part number

Available Versions (Others on Request)
Model No. of Phase Frame Size Holding Torque Body Length Encoder Res.

PHS42S Series

2 Phase

42X42mm

Up to 0.7Nm

Up to 67mm

1000 CPR

PHS57S Series

2 Phase

57X57mm

Up to 2.5Nm

Up to 112mm

1000 CPR

PHS60S Series

2 Phase

60X60mm

Up to 2.6Nm

Up to 90mm

1000 CPR

PHS86S Series

2 Phase

86X86mm

Up to 12.0Nm

Up to 150mm

1000 CPR

PHS42T Series

3 Phase

42X42mm

Up to 0.3Nm

Up to 51mm

1000 CPR

PHS57T Series

3 Phase

57X57mm

Up to 1.5Nm

Up to 80mm

1000 CPR

PHS60T Series

3 Phase

60X60mm

Up to 1.6Nm

Up to 90mm

1000 CPR

PHS86T Series

3 Phase

86X86mm

Up to 7.8Nm

Up to 150mm

1000 CPR
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