SINGLE-PHASE POSITION SENSORLESS PERMANENT MAGNET MOTOR CONTROL APPARATUS
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United States of America Patent
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N/A
Issued Date -
Jan 24, 2008
app pub date -
Jul 19, 2007
filing date -
Jul 21, 2006
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A single-phase permanent magnet motor control apparatus, in particular, a low price, flat output torque, low vibration, low noise single-phase permanent magnet motor control apparatus, and a fan and pump using such a single-phase permanent magnet motor control apparatus are provided. In a single-phase permanent magnet motor control apparatus for driving a single-phase permanent magnet motor by using a DC power supply, a converter for converting DC to AC, and a control circuit for controlling the converter, a motor current measuring unit, a terminal voltage measuring unit, a correction unit for correcting an impedance drop in motor constants, and a calculation unit for finding an induced voltage to be obtained by control are included, and a polarity of a terminal voltage is determined on the basis of a value of the found induced voltage.
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