Control system of boost converter and control method thereof
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsKazuyoshi Satoh, Yasuhiro Terao
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Abstract
In a control system of a boost converter and a control method of the control system, when a temperature of a current sensor of a boost converter is within a prescribed temperature range, an electronic control unit performs i) executing intermittent step-up control of the boost converter and learning of an offset value of the current sensor, and ii) controlling the boost converter using a corrected current value. The corrected current value is a value obtained by correcting a detected value of the current sensor using a correction value. The correction value is calculated using the learned offset value and the temperature of the current sensor.
Claims12
A control system of a boost converter, the control system comprising:
- a boost converter configured to exchange power between a first power line and a second power line through conversion of a voltage, the first power line being connected to a power storage device, the second power line being connected to an inverter that drives a motor;
- a current sensor configured to detect a current flowing in the boost converter;
- and
- an electronic control unit configured to set a plurality of prescribed temperature ranges of a temperature of the current sensor, the electronic control unit being configured to control the boost converter using a detected value detected by the current sensor, the electronic control unit being configured to perform following operations i) and ii) in each of the plurality of prescribed temperature ranges,
- i) executing intermittent step-up control and learning of an offset value of the current sensor, the intermittent step-up control being control of intermittently operating the boost converter such that a voltage of the second power line becomes a target voltage, and
- ii) controlling the boost converter using a corrected current value, the corrected current value being a value obtained by correcting the detected value using a correction value, the correction value being calculated using the learned offset value and the temperature of the current sensor.
A control method for a control system of a boost converter, the control system including a boost converter configured to exchange power between a first power line and a second power line through conversion of a voltage, a current sensor configured to detect a current flowing in the boost converter, and an electronic control unit configured to set a plurality of prescribed temperature ranges of a temperature of the current sensor, the first power line being connected to a power storage device, the second power line being connected to an inverter that drives a motor,
- the control method comprising:
- when in each of the plurality of prescribed temperature ranges,
- i) executing, by the electronic control unit, intermittent step-up control and learning of an offset value of the current sensor, the intermittent step-up control being control of intermittently operating the boost converter such that a voltage of the second power line becomes a target voltage;
- and
- ii) controlling, by the electronic control unit, the boost converter using a corrected current value, the corrected current value being a value obtained by correcting a detected value using a correction value, the correction value being calculated using the learned offset value and the temperature of the current sensor.
Dependencies are inferred from the claim text.