Elmo DBP SERIES 用户手册

86

DBP - Rev 6/93

When a differential encoder is used:

Set DS 2,3,6 to OFF

Otherwise they should be ON.

Set DS 2,3,6 to ON

The Resolver interface circuit consists of three basic blocks:

The R/D conversion is done by a variable resolution, monolithic converter

type 2S82 of Analog Devices. It accepts two signals from the Resolver (sine and

cos.) and converts them into binary position data bits. The resolution of the

position bits is user selectable 10, 12 ,14 and 16 (only for standard encoder

resolution). In addition, the R/D creates a signal that is proportional to the

Resolver velocity. This signal is being used as a velocity feedback.

The EPROM creates "Hall" signals by mapping the position data bits accepted

from R/D into suitable Hall signals to operate a specific brushless motor. In

addition, the encoder index (marker) signal is also produced from the EPROM.

The EPROM is designated as follows:

2     4        X   S  STD

Resolver's poles number

Ratio of motor/resolver

poles numbers

Encoder resolution

Commutation address

R/D resolution

X=User selectable,  0=10 bits
2=12 bits, 4=14 bits, 6=16 bits

In the S (standard) version zero crossing of phases B C occurs at position

address "0" of the Resolver.