Design Guidelines
Transport System Design
102
MagneMotion
Rockwell Automation Publication MMI-UM007F-EN-P - September 2020
Magnet Arrays
The amount of linear thrust that a QSHT motor provides is primarily a function of magnet
array length.
High Flux Magnet Arrays
The high flux magnet array for the QuickStick HT motors is an arrangement of neodymium
iron boron (NdFeB) permanent magnets in a Halbach-type array. This array augments the
magnetic field on the side of the array that faces the motor and reducing the field to near zero
on the other side. The magnets in the array are placed perpendicular to the direction of motion.
The magnet arrays come in several lengths and widths, with full magnets of alternating polar-
ity in the middle of the array and a North oriented half magnet at each end of the array. Orien-
tation of the magnets is referenced to the surface that faces the motor as shown in
.
Figure 3-30: High Flux Magnet Array, 3 Cycles, 7 Poles
The array is manufactured with the end cycles being 1 mm shorter than a standard cycle, this
allows two arrays to be placed end-to-end, or “stacked”, with a minimal gap between the
arrays to create longer arrays. For example, two 3-cycle arrays can be used to create a 6-cycle
array. When mounting arrays this way, the arrays must be mounted to make sure that the
cycle-to-cycle distance for all cycles in the combined array measures 120 mm.
NOTICE
Even though the magnet arrays are covered with a stainless
steel cover the magnets can still be damaged and are subject
to corrosion if damaged.
1 Cycle
Direction of Motion
N
S
N
S
N
Mounting Surface
120.0
N
S
1 Cycle
119.0