MA300GQ-P Datasheet, PDF (11/18 Pages) MPS Industries, Inc. – Angular Sensor for 3-Phase Brushless Motor Commutation and Position Control with Side-Shaft Positioning Capability

MA300
Angular Sensor for 3-Phase Brushless Motor
Commutation and Position Control with Side-Shaft
Positioning Capability
refreshed. Using the index, the user can detect a
double reading of the same data (same index), or
the user can see how many data points were
skipped (see Figure 12).
For reading the 8-bit index, the master has to
send 16 + 8 = 24 clock pulses.
a duty cycle of ½ and are shifted 60 deg relative
to each other (see Figure 14).
Figure 12: Timing Diagram for SPI Angle + Index Readout
Incremental - ABZ
With the ABZ output, the MA300 emulates a 10-bit
incremental encoder, such as an optical encoder,
providing logic pulses in quadrature (see Figure
13). Compared to signal signal B is shifted by a
quarter of the pulse period. Over one revolution,
signal A pulses 256 times; it makes 256-1024
edges per revolution. Signal Z (“Zero” or “Index”)
raises only once per turn, at the zero angle
position.
Figure 14. UVW Output during Rotation
Figure 13 : ABZ Output during Rotation
Block Commutation - UVW
The UVW output emulates the three Hall switches
usually used for the block commutation of the 3-
phase electric motor. The three logic signals have
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Reserved. MA700 Rev 1.0 September 2014
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