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US 8,575,875 B2Granted
Control device for voltage converter, vehicle equipped with the same, and control method for voltage converter
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsNaoyoshi Takamatsu, Masaki Okamura
Life of this patent
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Abstract
In a converter of a motor drive control device, one of a first switching element and a second switching element is selected in accordance with a current command value of a current flowing through a reactor. The converter is then controlled so that a drive command for the selected switching element is generated. In this way, the efficiency of the converter is improved while a voltage step-up or step-down operation is performed by the converter.
Claims13
A control device for a voltage converter capable of a voltage conversion between a power storage device and a load device,
- said voltage converter comprising:
- a first switching element and a second switching element connected in series between an electric power line for said load device and a ground line;
- a first rectifying element and a second rectifying element connected in parallel with said first switching element and said second switching element respectively, with a forward direction being defined as a direction from said ground line toward said electric power line;
- and
- a reactor provided on a path connecting a connection node of said first switching element and said second switching element, and a positive terminal of said power storage device, and
- said control device comprising:
- a current command calculation unit configured to calculate a current command value of a current flowing through said reactor by performing feedback control of a voltage between said electric power line and said ground line;
- a selection unit configured to select one of said first switching element and said second switching element in accordance with said current command value;
- and
- a drive command generation unit configured to generate a drive command for the switching element selected by said selection unit;
- wherein
- said selection unit selects said second switching element when said current command value represents a direction from said power storage device toward said load device, and selects said first switching element when said current command value represents a direction from said load device toward said power storage device.
9 more elements
A vehicle comprising:
- a power storage device;
- a rotating electric machine for generating a drive force to propel said vehicle;
- an inverter for driving said rotating electric machine;
- a voltage converter configured to be capable of a voltage conversion between said power storage device and said inverter;
- and
- a control device for controlling said voltage converter,
- said voltage converter comprising:
- a first switching element and a second switching element connected in series between an electric power line for said inverter and a ground line;
- a first rectifying element and a second rectifying element connected in parallel with said first switching element and said second switching element, respectively, with a forward direction being defined as a direction from said ground line toward said electric power line;
- and
- a reactor provided on a path connecting a connection node of said first switching element and said second switching element and a positive terminal of said power storage device, and
- said control device comprising:
- a current command calculation unit configured to calculate a current command value of a current flowing through said reactor by performing feedback control of a voltage between said electric power line and said ground line;
- a selection unit configured to select one of said first switching element and said second switching element in accordance with said current command value;
- and
- a drive command generation unit configured to generate a drive command for the switching element selected by said selection unit;
- wherein
- said selection unit selects said second switching element when said current command value represents a direction from said power storage device toward said inverter, and selects said first switching element when said current command value represents a direction from said inverter toward said power storage device.
15 more elements
A control method for a voltage converter capable of a voltage conversion between a power storage device and a load device,
- said voltage converter comprising:
- a first switching element and a second switching element connected in series between an electric power line for said load device and a ground line;
- a first rectifying element and a second rectifying element connected in parallel with said first switching element and said second switching element, respectively, with a forward direction being defined as a direction from said ground line toward said electric power line;
- and
- a reactor provided on a path connecting a connection node of said first switching element and said second switching element and a positive terminal of said power storage device, and
- said control method comprising the steps of:
- calculating a current command value of a current flowing through said reactor by performing feedback control of a voltage between said electric power line and said ground line;
- selecting one of said first switching element and said second switching element in accordance with said current command value;
- and
- generating a drive command for the switching element selected by said selecting step;
- wherein
- said second switching element is selected when said current command value represents a direction from said power storage device toward said load device, and said first switching element is selected when said current command value represents a direction from said load device toward said power storage device.
9 more elements
Dependencies are inferred from the claim text.