Frequency converters

Upgrade for grinding applications

Upgrade for grinding applications

Grinding applications represent a particular challenge in the world of machine tools. Precision, speed and flexibility are of crucial importance here. The SD4S frequency converter from Sieb & Meyer has all the properties to optimally support these highly dynamic processes.

Grinding applications are the top athletes in the ranks of machine tools. For example, in internal cylindrical grinding, sensorless operation of asynchronous and synchronous spindles up to 240,000 rpm must be possible. It is essential that the motor only heats up minimally in order to protect the sensitive materials and ensure a consistently high quality of machining. The flexibility of the machine also plays a crucial role, because a smooth and quick change between different grinding spindles must be guaranteed. Accordingly, the ability to save different motor parameter sets is essential. Special functions such as highly dynamic active load detection are also often required.

Highest rotating field frequencies with minimal rotor heating

The SD4S frequency converter from Sieb & Meyer offers an optimal solution for all of these requirements. The compact stand-alone version from the SD4x product generation of the Lüneburg high-speed specialists enables the operation of sensorless asynchronous, synchronous and IPM motors. With the asynchronous motor, rotating field frequencies of up to 6,000 Hz (360,000 rpm) are supported, with the synchronous motor up to 4,000 Hz (240,000 rpm) with minimal rotor losses and correspondingly low motor heating.

Sieb & Meyer achieves minimal heat development by using frequency converters with suitable control methods and a well-thought-out topology. The lower temperatures in turn extend the service life of the ball bearings typically used in machining spindles and at the same time improve the machining quality.

The SD4S also has parameterizable digital measuring system interfaces such as Biss-C, EnDat 2.2, TTL and Hall. The integrated real-time clock allows errors and interactions with external events or processes to be precisely analyzed.

Parameterization is carried out via a standard Ethernet interface, which replaces the USB interface, which is prone to interference in industrial environments. The Windows software drivemaster4 serves as the central tool for parameterization, commissioning and simulation of the SD4x generation.