Drive controller with high-current variant

Sieve & Meyer

Inka Krischke, 24.09.2024, 13:41

Drive controller with high-current variant

As a high-current version, the 'SD4B' drive controller from Sieb & Meyer extends the range of possible applications: as a servo amplifier for operating rotary and linear low-voltage servomotors or as a frequency converter for high-speed low-voltage synchronous and asynchronous motors.

Despite an increase in the rated current from 10 A to 13 A for the high-current version, the small size and width of 25 mm have been retained. Both SD4B variants are equipped with the Safe Torque Off (STO) safety function as standard, as well as interfaces for CANopen and Modbus TCP. A multi-protocol real-time Ethernet interface is available as an option, enabling flexible communication with the higher-level control system via Ethercat (CoE), Profinet IO and Powerlink. In addition to the TTL encoder input and output, the user also has five digital inputs/outputs and an Ethernet interface for simple parameterization.

In the high-speed range, the Sieb & Meyer SD4B frequency inverter supports sensorless operation of synchronous motors up to 240,000 rpm and asynchronous motors up to 360,000 rpm thanks to clock frequencies of up to 32 kHz. Sensor-based control based on TTL encoders is also possible. The robust speed control also allows high mass inertia ratios between motor and tool of up to 1:100.

The SD4B also has an integrated load indicator. This evaluates the torque-forming current of the motor and can thus replace acoustic structure-borne sound sensors. Load changes in the motor are thus detected with great accuracy. This in turn allows conclusions to be drawn about possible tool breakage or tool wear. The load indicator can also be used to detect contact between the tool and workpiece ('sparking') and to flexibly adjust machining feed rates.

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