ELECTRIC MOTOR DRIVE APPARATUS, HYBRID VEHICLE WITH THE SAME AND STOP CONTROL METHOD OF ELECTRIC POWER CONVERTING DEVICE
First Claim
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1. An electric motor drive apparatus comprising:
- a capacitance element smoothing a DC voltage;
an electric power converting device performing electric power conversion between said capacitance element and at least one electric motor;
an abnormality sensing device sensing an abnormality relating to said capacitance element, and providing a signal being activated when the abnormality is sensed;
a control device activating and providing a shutdown permission signal for permitting shutdown of said electric power converting device at least before said abnormality sensing device senses the abnormality; and
a shutdown circuit activating a shutdown signal instructing shutdown of said electric power converting device and providing the shutdown signal to said electric power converting device when the signal provided from said abnormality sensing device becomes active while said shutdown permission signal is active.
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Abstract
An ECU activates a shutdown permission signal and provides it to an AND gate when a shutdown signal is inactive. Thus, when an abnormality sensing device does not sense an abnormality, the ECU always keeps the shutdown permission signal active. The AND gate performs logical AND between a signal provided from the abnormality sensing device and the shutdown permission signal to provide the shutdown signal to inverters. When a limp-home run permission signal becomes active while the shutdown signal is active, the ECU inactivates the shutdown permission signal.
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Citations
19 Claims
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1. An electric motor drive apparatus comprising:
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a capacitance element smoothing a DC voltage; an electric power converting device performing electric power conversion between said capacitance element and at least one electric motor; an abnormality sensing device sensing an abnormality relating to said capacitance element, and providing a signal being activated when the abnormality is sensed; a control device activating and providing a shutdown permission signal for permitting shutdown of said electric power converting device at least before said abnormality sensing device senses the abnormality; and a shutdown circuit activating a shutdown signal instructing shutdown of said electric power converting device and providing the shutdown signal to said electric power converting device when the signal provided from said abnormality sensing device becomes active while said shutdown permission signal is active. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 19)
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12. An electric motor drive apparatus comprising:
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a DC power supply; a capacitance element smoothing a voltage supplied from said DC power supply; a booster device boosting a voltage supplied from said capacitance element; first and second drive devices driving first and second electric motors based on the voltage boosted by said booster device, respectively; a voltage sensing device sensing a voltage across opposite terminals of said capacitance element; an abnormality sensing device providing a signal to be activated when the voltage sensed by said voltage sensing device exceeds a predetermined threshold; a control device activating and providing a shutdown permission signal for permitting shutdown of said first and second drive devices at least before said abnormality sensing device senses the abnormality; and a shutdown circuit activating a shutdown signal instructing shutdown of said first and second drive devices and providing the shutdown signal to said first and second drive devices when the signal provided from said abnormality sensing device becomes active while said shutdown permission signal is active.
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17. A stop control method of stopping an electric power converting device performing electric power conversion between a capacitance element smoothing a DC voltage and at least one electric motor, comprising;
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a first step of sensing an abnormality relating to said capacitance element; a second step of activating a shutdown permission signal for permitting shutdown of said electric power converting device before said abnormality is sensed; and a third step of shutting down said electric power converting device when said abnormality is sensed while said shutdown permission signal is active. - View Dependent Claims (18)
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Specification