Motor control apparatus
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United States of America Patent
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-
Sep 5, 2017
Grant Date -
Oct 13, 2016
app pub date -
Apr 6, 2016
filing date -
Apr 9, 2015
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A motor control apparatus controlling current feeding and a rotational direction of a motor includes: four bridge-circuit switches between a high and low potential lines; two current feeding line switches connected through the motor between a first and second nodes in series to arrange two parasitic diodes facing each other; a pull-up resistor between the high potential line and a third node; a pull-down resistor between the low potential line and a fourth node to interpose the motor between the third and fourth nodes; a protective diode blocking current; and a fault diagnostic device having: a driver turning on or off the switches; and a voltage determinator determining suitability of a first and second voltages and performing initial fault diagnosis for at least one of the switches.
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