ABB 3BSE017194R1 Sequence control module

shows the basic control structure of the ARS 2100 SE. Current controller, speed controller and positioning controller are arranged in a cascade. Due to the rotor-oriented control principle the current can be set separated in active current (iq) and reactive current (id). Therefore there are two current controllers, both of them PI controllers. To provide a better overview, however, the id controller does not appear in Figure 2. The planned basic modes of operation are torque control, speed control and positioning. Functions such as synchronisation, “flying saw” and so on are variants of these basic modes of operation. Furthermore, individual functions of these modes of operation can be combined with each other, for example torque control with speed limitation.

Pulse width modulation (PWM) 

The ARS 2100 SE series servo drives are able to vary the clock frequency in the current controller circuit. In most cases the settings can be made using the parameterisation software Metronix ServoCommander® . In order to minimize switching losses, the clock of the pulse width modulation can be cut in half as compared to the frequency in the current controller circuit.The ARS 2100 SE series servo drive also features a sine modulation or alternatively a sine modulation with third harmonic. This increases the effective converter output voltage. The type of modulation can be selected via the Metronix ServoCommander® . The default setting is sine modulation. If the sine modulation with third harmonic is used, the controllable upper motor speed limit increases due to the higher control reserve of the PWM output stage.

Set point management

 For speed controlled and torque controlled modes of operation, the set point can be set via a set point management.The set point management has a ramp generator with a preceding adder. Any of the above-mentioned set point sources can be selected via the corresponding selectors and run through the ramp generator. Additional sources can be selected as set points using two more selectors. These, however, cannot be run through the ramp generator. The total set point is then a summation of all values. The acceleration and deceleration times of the ramp are directionally parameterisable.

Application industry

The products can be used in the following industries: power plant, paper making, steel, mining, rubber, water supply, cement, chemical industry, glass, printing

Textile, machinery, plastics, coatings, medicine, hospitals, food, hotels, scientific research institutions

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