3-5 phase driver for TMC454

3-5 phase driver for TMC454

Postby threatspectrum » 08 Jan 2010, 09:02

I'm designing a 2-axis microstepping solution for a compact enclosure. I'm looking for 3, 4, or 5 phase microstepping (at least 1/32 step) in NEMA17 and 23.

I figured I could use 2 chains of 457 --> 332 --> 603 but this is a lot of BGA pins to layout and debug.

I'm looking into the TMC454 since it appears to have the high-end motion capabilities of the 457 with the 3-phase sequencing of the 332. Looking at page 8 of the 454 datasheet, I need to select driver chip(s). The TMC603 is a 3-phase driver, but I can't tell if it is compatible with the 454. The TMC249A is mentioned in the 454 datasheet, but I see no mention of 3-phase capability for this series of drivers.
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Re: 3-5 phase driver for TMC454

Postby TRINAMIC_BD » 08 Jan 2010, 10:27

In fact the actual three phase motors mostly have only three coil connections. Thus, they cannot be driven with a two phase driver like TMC239, which always need both ends of a single coil in order to drive it based on a constant current chopper. The TMC454 plus TMC239 can only drive three phase stepper motors in microstepping, which provide 6 connections and have no internal interconnection of the coils.
A star or triangle connection three phase stepper motor has special driving scheme requirements, which also differ slightly from a BLDC motor, but it can provide superior microstepping exactness. We can propose you the more modern solution TMC457 as high end motion controller plus TMC332 as motor driver controller. For test purpose, the TMC332-EVAL evaluation board will give you the possiblity to evaluate motion behaviour of a three phase motor controlled by the TMC332. It also allows evalution of encoder signals. The board can also be coupled to the TMC457-EVAL using step and direction interface.
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