Stepper evolves to higher efficiency
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McLennan Servo Supplies product story
Edited by the Engineeringtalk editorial team
Jul 1, 2003
The OMSE570 Evo 2 uses a new high-efficiency bipolar output stage that provides increased efficiency.
The OMSE570 Evo 2 from Mclennan Servo Supplies uses a new high-efficiency bipolar output stage that provides increased efficiency.
The use of the latest power device technology has enabled the design team to achieve a 35% increase in output power while reducing unit size and operating temperature.
The Evo 2 drive is a development of Mclennan's successful low cost MSE570 Eurocard drive module that is suitable for any two- or four-phase stepper motor with coil ratings from 0.5 to 5.5A per phase.
The advanced new power stage has dramatically reduced unit width, thereby enabling up to 12 units to be mounted in a single 19in standard Eurorack, resulting in an improved rack density of 70%.
Power losses have been reduced by more than 200% greatly increasing system efficiency, and the increase in drive voltage from 35 to 48V results in significant increases in motor performance.
The MSE570 Evo 2 provides the choice of full or half step drive for improved motor smoothness and resolution, has thermal protection and onboard diagnostics for increased reliability.
Although designed for control from external clock and direction signals, additional upgrade features include the provision of an onboard voltage controlled oscillator circuit for operation offline from the host control source.
Despite the improved performance, efficiency and packaging characteristics of the MSE570 Evo 2, Mclennan has retained its competitive pricing policy and is launching the Evo 2 at the same price as the outgoing model.
Prices range from GBP 130 for small quantities falling to less than GBP 80 for the volume OEM user.
A range of motherboard options that provide solder-free connection to external control signals or Mclennan's own PM600 motion controller will appeal to the system integrator.
Furthermore, detailed design work on the output stage has resulted in a unit with low electrical emissions so compliance with the EMC directive is achieved without expensive additional noise suppression circuitry.
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