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Voltage conversion device

A voltage conversion and voltage converter technology, which is applied to output power conversion devices, regulating electrical variables, electric vehicles, etc., can solve problems such as infeasible response time management, achieve control response capabilities, reduce capacitance, and prevent delays Effect

Inactive Publication Date: 2008-06-11
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, managing the response time of the motor control will not be feasible

Method used

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Embodiment Construction

[0031] Now, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that the same symbols in the drawings indicate the same or corresponding parts.

[0032] FIG. 1 is a schematic block diagram of a motor drive device to which a voltage conversion device according to an embodiment of the present invention is applied.

[0033] Referring to FIG. 1 , motor driving device 100 includes DC power supply B, voltage sensors 10 , 13 , current sensors 18 , 24 , capacitor C2 , boost converter 12 , inverter 14 and control device 30 .

[0034] The AC motor M1 is a drive motor for generating torque for driving drive wheels of a hybrid vehicle or an electric vehicle. The AC electric motor M1 also has the function of a generator driven by the engine, and can operate as an electric motor for the engine to perform starting of the engine, for example.

[0035] Boost converter 12 includes reactor L1, NPN transistors Q1, Q2 and diodes D1, ...

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Abstract

When a voltage conversion operation is started, a control circuit (30) performs an operation to obtain a voltage command value for each control timing with setting a target voltage obtained based on a torque command value (TR) and a motor rotation number (MRN) as a final value, and controls a boost converter (12) so as to match an output voltage (Vm) with the voltage command value. The control circuit (30) has a prescribed threshold value set to be lower than the target voltage. The control circuit (30) controls the boost converter (12) with setting an absolute value of a rate of change between control timings to a first value until the voltage command value reaches the prescribed threshold value. When the voltage command value becomes at least the prescribed threshold value, the boost converter (12) is controlled with setting the absolute value of the rate of change to a second value smaller than the first value.

Description

technical field [0001] The present invention relates to a voltage conversion device for converting a DC voltage from a power source into a target voltage. Background technique [0002] In recent years, hybrid vehicles and electric vehicles have attracted attention as environmentally friendly vehicles. A hybrid vehicle uses a DC power source, an inverter, and an electric motor driven by the inverter as a mechanical power source in addition to a conventional engine. That is, a hybrid vehicle obtains mechanical power by driving an engine, and also by converting a DC voltage from a DC power source into an AC voltage with an inverter and rotating an electric motor with the converted AC voltage. [0003] An electric vehicle uses a DC power source, an inverter, and an electric motor driven by the inverter as a mechanical power source. [0004] In a hybrid vehicle or an electric vehicle as described above, a configuration has been considered in which a DC voltage from a DC power s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/156B60L11/18H02M3/155H02M7/48H02P27/06
CPCH02M2001/007H02M1/36H02P2201/09H02P27/08H02M3/156H02M1/007
Inventor 针生大介
Owner TOYOTA JIDOSHA KK
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