Table of Contents
Advertisement
RAA3064002GFP/RAA3064003GFP
1. Overview
The RAA3064002GFP and RAA3064003GFP (hereinafter together referred to as "this IC") are resolver-to-digital
converters which are intended for use with single-phase excitation, two-phase output type resolver sensors (angle sensors).
The resolver sensor outputs analog signals (electrical angle information) which are proportional to the angle of the
mechanical rotation of the resolver. This IC converts these analog signals to digital signals.
This IC can be connected to either of two types of resolver sensor. Figure 1.1 shows the configurations of the connectable
resolvers. In this user's manual, we define the configurations of transformer-type and current-detection type resolver
sensors as shown in (a) and (b) in figure 1.1, respectively.
This IC outputs a single-phase excitation signal to the resolver sensor. The signal is triggered by the excitation clock signal
(rectangular excitation wave) input from the host MCU. This IC then generates an angle signal (rectangular wave) from the
two-phase signals (electrical angle information) detected by the resolver sensor, and outputs the angle signal to the host
MCU. Angle information can be obtained by using the host MCU to measure the phase difference between the rectangular
excitation wave and angle signal.
The frequency of the excitation signal input to the resolver sensor is selectable as 5 kHz, 10 kHz, or 20 kHz. Select a
frequency that suits the characteristics of the resolver.
This IC incorporates amplifiers that are configured with noise filters to eliminate noise in the signals detected by the resolver
sensor, and a circuit to correct errors in the detected signals from the resolver. This IC also has functionality for detecting
an excessive temperature within the chip and two shunt current amplifiers for use in general motor control circuits.
Note 1. See Basic Operation for Conversion of Signals from Resolver.
Figure 1.1 Configurations of the Connectable Types of Resolver Sensor
R03UZ0002EJ0120 Rev.1.20
Apr 05, 2021
Note 1
SIN+
Positive
excitation
SIN-
COS+
Negative
excitation
COS-
(a) Transformer-type
resolver sensor
0°
90° 180° 270°
+
+
+
+
-
-
-
-
(b) Current-detection type
resolver sensor
1. Overview
Page 2 of 52
Advertisement
Table of Contents
