Elmo DBP SERIES manual Description, Analog Section Standard Features

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1.Description

The DBP series are digital, full wave, three phase servo amplifiers designed for high performance brushless servo motors in the range of up to 7KW. They utilize power MOSFETs and Surface Mounting Technology which contribute to its high efficiency and compact design. The DBP operates from a single AC supply (either single or three phase) and, when using the galvanic isolation option, it can be connected directly to the Mains.

The DBP is constructed from two main PCBs mounted on a heat sink plate. The lower board contains the rectifying bridge, the power switching transistors which drive the motor, terminals for the power stage, the switch mode power supply, the protection logic and commutation logic. The upper PCB is the Digital Control Board (DCB) which contains the digital control logic, terminals for the control stage, D-type connector for the communication and a 4-digit display.

The DBP requires a position sensor in order to enable its operation. It can be either a Resolver or a combination of an optical encoder and Hall effect sensors. When using a Resolver, a small interface card is mounted on top of the DCB.

The DBP is available in either panel version or rack version with two DIN 41612 connectors. The rack version can be fitted in a panel mount enclosure (ENCD-3U or ENCD-6U), that is specially designed for a simple hook-up procedure.

The amplifiers are fully protected against the following faults:

*Under/over voltage

*Shorts between the outputs or between the outputs to ground.

*RMS current limit.

*Insufficient load inductance.

*Loss of commutation signals.

*Excess temperature.

*Excess position error.

Analog Section Standard Features:

*Single AC supply (single or three phase)

*Zero Deadband.

*Motor current monitor.

*Motor speed monitor.

*Extra differential operational amplifier.

DBP - Rev 6/93