The drive is designed for use in a suitable enclosure, with associated control equipment. The unit accepts a variety of standard three-phase ac supply

voltages depending upon the model, and is suitable for the powering of DC shunt field and permanent magnet motors, providing controlled dc output

voltage and current for armature and field.

All units are designed for simple and economical panel mounting. Plug-in control connectors simplify the fitting and removal of the unit to the panel.

Where possible, standard parts are used throughout the range thereby reducing the variety of spare parts required to maintain a multi-drive system. For

example, the same basic control boards are used in all controllers regardless of horsepower or bridge configuration.

The control circuit is totally isolated from the power circuit thus simplifying the interconnection of controllers within a system and improving operator

safety. The coding circuitry adjusts automatically to accept supply frequencies between 45-65Hz and possesses high immunity to supply-borne

interference. The controllers are phase rotation insensitive.

Control and Communications

The drive is controlled by a 32-bit microcontroller providing advanced features such as:

• Complex control algorithms which are not achievable by simple analog techniques.

• Software-configurable control circuitry built around standard software blocks.

• Serial link communications with other drives or a PC for advanced process systems.

The Keypad gives access to parameters, diagnostic messages, trip settings and full application programming.

Regenerative and Non-Regenerative Models

The DC590+ DRV Series includes both regenerative and non-regenerative models:

• Regenerative drives consist of two fully-controlled thyristor bridges, contactors, fuses, and a field bridge with full transient and overload

protection, together with sophisticated electronic control of acceleration and deceleration, speed and torque in both directions of rotation.

• Non-regenerative drives consist of one fully-controlled thyristor bridge, contactors, fuses, and a field bridge with full transient and overload

protection, together with its associated electronic control circuitry, and provide accurate speed and/or torque control in one selected direction of

rotation.

Field Regulator

A field regulator is standard. The regulator consists of a full-wave, half-controlled, single phase thyristor bridge with transient and overload protection.

It provides either a fixed voltage or fixed current source, depending upon the selected mode of operation. The field current mode of operation can be

further enhanced to provide field weakening for controlling motors in extended speed or constant horsepower control.

DC590+ DRV Series DC Digital Drive

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