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The microcomputer performs internal processing to cancel spike voltage during the regenerative process.
Furthermore, even if the induced voltage is low, position detection is still possible, thus allowing sensor-less operation at low rotation speed in the ini-
tial stage of operation. This reduces the starting current and improves the IPM reliability.
Spike voltage
(cancelled)
Terminal voltage waveform
2 – 15
Reference voltage
(1/2 of DC voltage)
Comparator output waveform
(Position signal waveform)
GSXP12HRN
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