Electric power conversion apparatus
AssigneeDenso Corporation
InventorTakashi Suzuki
Life of this patent
Estimating the term…
Abstract
An electric power conversion apparatus converts electric power supplied to a motor having a winding set formed of coils corresponding to a plurality of phases. An inverter part has a plurality of FETs forming switching element pairs, each of which corresponds to each phase of the winding set. Pull-up resistors are provided between the coils and a high-potential side of a battery, respectively. A neutral point voltage detection part detects a neutral point voltage of the winding set. A microcomputer detects abnormality based on the neutral point voltage.
Claims2
An electric power conversion apparatus for converting electric power of a power source supplied to a motor having a winding set, which is formed of coils corresponding to a plurality of phases, the electric power conversion apparatus comprising:
- an inverter part having a plurality of switching element pairs corresponding to the plurality of phases of the winding set, each of the switching element pairs being formed of a high-potential side switching element provided at a high-potential side of the power source and a low-potential side switching element provided at a low-potential side of the power source;
- resistors provided between the coils of the winding set and the high-potential side of the power source;
- a neutral point detection part for detecting a neutral point voltage of the winding set;
- and
- an abnormality detection part for detecting abnormality based on the neutral point voltage detected by the neutral point detection part wherein
- the resistors have different resistances among the plurality of phases of the winding set.
An electric power conversion apparatus for converting electric power of a power source supplied to a motor having a winding set, which is formed of coils corresponding to a plurality of phases, the electric power conversion apparatus comprising:
- an inverter part having a plurality of switching element pairs corresponding to the plurality of phases of the winding set, each of the switching element pairs being formed of a high-potential side switching element provided at a high-potential side of the power source and a low-potential side switching element provided at a low-potential side of the power source;
- a first resistor provided between one of the coils of the winding set and the high-potential side of the power source;
- a plurality of second resistors, each of the plurality of second resistors having one end connected to the plurality of coils of the winding set and other end connected to a connection part;
- a neutral point detection part for detecting, as a neutral point voltage of the winding set, a voltage developed at the connection part;
- and
- an abnormality detection part for detecting abnormality based on the neutral point voltage detected by the neutral point detection part;
- wherein
- the plurality of second resistors have different resistances among the plurality of phases of the winding set.
Dependencies are inferred from the claim text.