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Tom Bullock wrote:
> Power blocks are available from several vendors
where they supply only the transistors and heat sinks.
> All logic, loop closures, and compensations are done
within the main controller. On the surface, this
> looks less expensive, but the additional application
effort will more than offset the lower hardware
costs. <
That would depend on the level of expertise of the integrator with the individual controller. An experienced integrator using our controller and a PWM power block type amplifier will potentially have lower integration costs than the same integrator using our controller and an expensive intelligent drive, as he may have to do loop tuning and configuration in both the drive and the controller. The other option in this situation is often to use configuration parameters in the controller which effectively turn it into a dumb drive. In which case, why pay for the expensive intelligence?
The intelligent drives are in general not capable of well coordinated motion unless you are setting up simple systems such as low speed conveyors. You therefore usually have to put an intelligent controller in front of them. Once you have paid for that intelligence, why pay for it twice?
Davis Gentry
Applications Engineer
Delta Tau Data Systems
804.795.4288
> Power blocks are available from several vendors
where they supply only the transistors and heat sinks.
> All logic, loop closures, and compensations are done
within the main controller. On the surface, this
> looks less expensive, but the additional application
effort will more than offset the lower hardware
costs. <
That would depend on the level of expertise of the integrator with the individual controller. An experienced integrator using our controller and a PWM power block type amplifier will potentially have lower integration costs than the same integrator using our controller and an expensive intelligent drive, as he may have to do loop tuning and configuration in both the drive and the controller. The other option in this situation is often to use configuration parameters in the controller which effectively turn it into a dumb drive. In which case, why pay for the expensive intelligence?
The intelligent drives are in general not capable of well coordinated motion unless you are setting up simple systems such as low speed conveyors. You therefore usually have to put an intelligent controller in front of them. Once you have paid for that intelligence, why pay for it twice?
Davis Gentry
Applications Engineer
Delta Tau Data Systems
804.795.4288