Title:
ELECTRIC AUTOMOBILE
Document Type and Number:
Japanese Patent JP2014121999
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an electric automobile capable of maintaining the cooling performance of a condenser even if an amount of coolant for cooling an inverter is reduced.SOLUTION: An electric automobile includes: a travel motor; an inverter for the motor; a circulation path for circulating a coolant for cooling the inverter; a reserve tank disposed amid the circulation path; an electric pump for sending the coolant to the inverter; a control device for applying PWM control to the electric pump; and a temperature sensor for detecting temperature of the inverter. In a case where a rotation speed of the electric pump exceeds a specified value, the control device performs protective control of the electric pump. Based on a temperature rise rate of the cooling water calculated from at least one of a power supply state of the travel motor, an inverter temperature, and a control state of the electric pump, the control device estimates a residual amount of a coolant stored in the reserve tank, and, if detecting an event that the estimated residual amount is reduced to less than a given amount, reduces a duty ratio of PWM or increases a specified value.
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Inventors:
SHONO YUMI
Application Number:
JP2012280050A
Publication Date:
July 03, 2014
Filing Date:
December 21, 2012
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
B60K11/02; B60K6/445; B60L3/00; B60W10/30; B60W20/00; F01P3/20; F01P7/16; F01P11/00; F01P11/18
Attorney, Agent or Firm:
Kaiyu International Patent Office