ELECTRICAL DRIVES AND VEHICLE ELECTRONICS LTD.

HEAVY-DUTY DC DRIVES

CASCADE DRIVES

SOFT STARTERS

SYNCHRONOUS MOTOR
DRIVES

MPDC TYPE DRIVE SERIES

The type MPDC drives serve to control DC motors with external excitation, and to fit them to the technological environment. Depending on the way of cooling, the grade of protection is IP21 in case of ventilated execution and it is IP54 in case of closed execution. In the latter case, the heat transfer between the external and internal air is ensured by a heat exchanger (air conditioner).

The flexible fitting to the technological environment is made possible by I/O modules of appropriate number and type on the hardware side and by the program of the freely programmable PLC of the controller unit on the software side. For the communication between the twin drives, fast series ports are used, while for the connection to an intelligent device, RS232 port is at the user's disposal in the basic execution. As options a CAN bus or an RS422 connection are available.

A large display mounted on the house, an intelligent internal log facility, a waveform storing device and selective error signaling routines make the maintaining of the operation and the troubleshooting of the drives easier.

The base of the control is an adaptive armature peak-current controller. This partial program ensures with a very short running time that the armature current at the change of the reference signal, both in the continuous and in the interrupted conduction range, reaches the state corresponding to the new reference signal in one step that is on the effect of the next ignition. The other controls of a given tasks that may be defined by the software are based on this type of the armature current control. In a similar way, the type and the input channel of the different reference and feedback signals are also programmable and changeable any time, so that no limitation should be made regarding the technological elements. The program and the interface cards make possible that installing the drive in almost every technological environment, the necessary control (of current, voltage, revolution per minute, position, pulling force, field weakening) and the reception that is the generation of all necessary technological signals can be realized without any additional hard-ware.