BMR SFU 0303/4, Manual

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SFU 0303 Frequency Converter
1. Introduction
Due to its construction, the rotational speed of a 3-phase AC motor is directly dependent on
the frequency of the voltage and the number of poles. In case of a 3PH 50Hz voltage and a
2-pole motor, the nominal speed would be 50 rps * 60 = 3000 rpm.
In case of BLDC motors (brushless dc), the speed is directly dependent on the voltage applied.
3-phase AC motors provide numerous benefits in industry, such as brushless operation,
freedom from wear and tear, favorable capacity/weight ratio, high-speed capability, and
much more. These motors can be used many different application areas, such as milling and
grinding spindles, or with drilling machinery, for example.
The advantages of SFU0303 compared to similar converters:
Safe Power Stage Pulse inhibitor, authorized to current regulations EN 954_1 Cat 3
Maximum Power in industrial network up to 5kVA
High efficiency by symmetrical PWM
Real time vector control for sensorless operation
Maximum Torque even at lowest rotational speeds
High possible acceleration rates for short process times. For example 25.000rpm/sec
with a 2,2 KW Motor (with robotic applications)
Pulse-Amplitude (PAM / =Block-Modus ) Control possible because of regulated
intermediate voltage control (on option)
Very slow rotational speeds (10rpm) possible for reaching tool changer positions.
Very low current consumption because of real time power control
Easy Integration into new and existing PLCs because of flexible I/O configuration
Various interface options: RS232, USB
Easy reversing the direction of rotation by Software without loss of power.
Autotuning function for spindle setup.
Testrun with graphical documentation of voltages and currents of the spindle
Up to 16 different spindle characteristics can be stored
Very user-friendly debugging interface for setup control