Load driving apparatus, vehicle, and abnormality processing method at load driving apparatus
First Claim
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1. A load driving apparatus, comprising:
- a first rotating electric machine generating a drive force,a first driving device arranged between a first power supply line and said first rotating electric machine, driving said first rotating electric machine with supply of power from said first power supply line,power generation means connected to said first power supply line for supplying generated power to said first power supply line,an up-conversion device arranged between a second power supply line connected to a DC power source and said first power supply line, boosting voltage of said second power supply line for output to said first power supply line, andcontrol means for outputting an instruction to reduce a torque generated by said first rotating electric machine to said first driving device when a revolution count of said first rotating electric machine exceeds a predetermined limit value,wherein said control means outputs, to said up-conversion device, an instruction to reduce a boosting rate of said up-conversion device when the revolution count of said first rotating electric machine exceeds a predetermined sub-limit value that is at most said predetermined limit value,wherein said power generation means includesa second rotating electric machine having a power generation function, anda second driving device arranged between said first power supply line and said second rotating electric machine, driving said second rotating electric machine,wherein said control means maintains the boosting rate of said up-conversion device without outputting, to said up-conversion device, said instruction to reduce the boosting rate of said up-conversion device in a case where said second rotating electric machine is currently halting or in a power running operation when the revolution count of said first rotating electric machine exceeds said predetermined sub-limit value.
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Abstract
When an ECU determines that the motor count of a motor generator exceeds a predetermined limit value, control is effected to set the torque of motor generator to zero. Further, when the ECU determines that motor count exceeds the predetermined limit value, voltage control of inverter input voltage is reduced by a predetermined level.
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Citations
14 Claims
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1. A load driving apparatus, comprising:
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a first rotating electric machine generating a drive force, a first driving device arranged between a first power supply line and said first rotating electric machine, driving said first rotating electric machine with supply of power from said first power supply line, power generation means connected to said first power supply line for supplying generated power to said first power supply line, an up-conversion device arranged between a second power supply line connected to a DC power source and said first power supply line, boosting voltage of said second power supply line for output to said first power supply line, and control means for outputting an instruction to reduce a torque generated by said first rotating electric machine to said first driving device when a revolution count of said first rotating electric machine exceeds a predetermined limit value, wherein said control means outputs, to said up-conversion device, an instruction to reduce a boosting rate of said up-conversion device when the revolution count of said first rotating electric machine exceeds a predetermined sub-limit value that is at most said predetermined limit value, wherein said power generation means includes a second rotating electric machine having a power generation function, and a second driving device arranged between said first power supply line and said second rotating electric machine, driving said second rotating electric machine, wherein said control means maintains the boosting rate of said up-conversion device without outputting, to said up-conversion device, said instruction to reduce the boosting rate of said up-conversion device in a case where said second rotating electric machine is currently halting or in a power running operation when the revolution count of said first rotating electric machine exceeds said predetermined sub-limit value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An abnormality processing method at a load driving apparatus,
said load driving apparatus including a first rotating electric machine generating a drive force, a first driving device arranged between a first power supply line and said first rotating electric machine, driving said first rotating electric machine with supply of power from said first power supply line, power generation means connected to said first power supply line for supplying generated power to said first power supply line, and an up-conversion device arranged between a second power supply line connected to a DC power source and said first power supply line, boosting voltage of said second power supply line for output to said first power supply line, said abnormality processing method comprising: -
a first step of determining whether a revolution count of said first rotating electric machine exceeds a predetermined sub-limit value, a second step of generating an instruction to reduce a boosting rate of said up-conversion device when determination is made that the revolution count of said first rotating electric machine exceeds said predetermined sub-limit value, a third step of controlling the boosting rate of said up-conversion device based on the instruction generated at said second step, a fourth step of determining whether the revolution count of said first rotating electric machine exceeds a predetermined limit value that is at least said predetermined sub-limit value, a fifth step of generating an instruction to reduce a torque generated by said first rotating electric machine when determination is made that the revolution count of said first rotating electric machine exceeds said predetermined limit value, and a sixth step of controlling the torque of said first rotating electric machine based on the instruction generated at said fifth step. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification