Control apparatus for electric vehicle
First Claim
1. A control apparatus for an electric vehicle, which has a motor driven by electric power supplied from an inverter comprised of a plurality of power elements and the vehicle being propelled by an output of said motor, comprising:
- a power reducing device for reducing the electric power to be supplied to said power elements of the inverter, when the temperature of the power elements of the inverter exceeds a predetermined temperature;
a rotation detecting circuit for detecting whether the motor is rotating in a reverse direction, wherein when the motor is rotating in the reverse direction, the power supplied to the power elements is reduced as a function of the load on the motor;
a switching device for switching the current supplying power elements from the current supplying power elements used up until that time to the current supplying power elements corresponding to the change of the rotational position; and
an electric power increasing device for increasing or starting the supply of said electric power to said electric power elements after said switching device has performed the switch.
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Accused Products
Abstract
A control apparatus for an electric vehicle is provided, which is capable of reducing the weight of the electric vehicle and preventing the inverter circuit from overheating. When the vehicle stops on an uphill due to stalling, the control unit 30 starts counting the time over which current is supplied through the same IGBT element. When the count value reaches a value corresponding to the time at which the IGBT 40 starts generating heat, the control unit 30 outputs a control signal to reduce the motor driving current to the IPM 20. The rotation sensor 60 detects the rotational position when the motor rotates in the reverse direction, while the reduction of the motor driving current reduces the driving power of the motor. Based on the detection of the rotational position, the control unit 30 performs switching of the phase of the IGBT 40, and when the normal current supply phase is connected, the motor driving current which drives the motor is increased.
22 Citations
2 Claims
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1. A control apparatus for an electric vehicle, which has a motor driven by electric power supplied from an inverter comprised of a plurality of power elements and the vehicle being propelled by an output of said motor, comprising:
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a power reducing device for reducing the electric power to be supplied to said power elements of the inverter, when the temperature of the power elements of the inverter exceeds a predetermined temperature;
a rotation detecting circuit for detecting whether the motor is rotating in a reverse direction, wherein when the motor is rotating in the reverse direction, the power supplied to the power elements is reduced as a function of the load on the motor;
a switching device for switching the current supplying power elements from the current supplying power elements used up until that time to the current supplying power elements corresponding to the change of the rotational position; and
an electric power increasing device for increasing or starting the supply of said electric power to said electric power elements after said switching device has performed the switch. - View Dependent Claims (2)
when the temperature detected by a temperature sensor for detecting the temperature of said electric power element exceeds a predetermined temperature, or when the length of time for providing electric power through the same power elements exceeds a predetermined time.
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Specification
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- Resources
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Current AssigneeHonda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
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Original AssigneeHonda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
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InventorsAdachi, Satoru, Saito, Yuji, Kimura, Kenichiro, Takanohashi, Hiroaki, Kondou, Hajime, Shimane, Iwao
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Primary Examiner(s)Fletcher, Marlon T.
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Application NumberUS09/733,050Publication NumberTime in Patent Office680 DaysField of Search318/65, 318/66, 318/101, 318/739, 318/757, 318/759, 318/798-802, 318/256-265, 318/280-284, 318/286, 318/139-140, 318/432-434US Class Current318/280CPC Class CodesB60L 15/2009 for brakingY02T 10/64 Electric machine technologi...Y02T 10/72 Electric energy management ...
