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9.1.1
Suspicion of Abnormal Resolver Signal (Square-sum method)
In case of suspicion of abnormal resolver signal (square-sum method) detection, true error
factor should be identified and eliminated according to the below troubleshooting flow.
■Troubleshooting flow of abnormal resolver signal
Detection by abnormal resolver signal（square-sum）
Please check the signal waveform of R1/R2 excitation output terminal of this product（ refer 6.1.1）
Almost no signal
amplitude
Square wave or
saturated.
Excessive connection
impedance or possible
excitation line breaking.
Please check the
connection status of the
load between R1-R2.
Center of signal is
near VCC or GND.
Expected sine wave (No problem)
Possibility of GNDshort or VCC-short.
Check possible short
between R1/R2 and
VCC/GND line.
External excitation amplifier exist？
Please make sure there is no short circuit between R1-R2.
No short
Short exist
There is an external
excitation amplifier.
No external Amp.
Direct resolver excitation
with built-in amp.
What is clock status？
Ple ase improve ment.
Please check the excitation signal
waveform at resolver exciting terminal.
No signal
Possibility of
mis-configuration
Clock might not be
applied.
Review
default
setting and update
serial input setting
register (Bit 2).
Please make sure
that
clock
is
applied
successfully.
Break/down of
exciting line
Normal signal
Detect fault by the resolver signal.
Please check the connection of
exciting line or the state of
the amplifier power supply
line.
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