Apparatus and method for diagnosing a failure of an inverter
US-2024405664-A1 · Dec 5, 2024 · US
Control system for inverter
US2016248317A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016248317-A1 |
| Application number | US-201615047107-A |
| Country | US |
| Kind code | A1 |
| Filing date | Feb 18, 2016 |
| Priority date | Feb 24, 2015 |
| Publication date | Aug 25, 2016 |
| Grant date | — |
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Abstract
Official abstract text for this publication.
A control system includes an electronic control unit. The electronic control unit is configured to execute three-phase ON control such that two transistors connected in parallel to the first transistor are switched ON when a condition i) is satisfied, The first transistor is one of the transistor of the six transistors and in which the short-circuit fault has occurred. The condition i) is that a recovery loss of a first diode in which a reverse recovery current is generated is estimated to be smaller than a recovery tolerance.
First claim
Opening claim text (preview).
What is claimed is: 1 . A control system for an inverter, the inverter including six transistors and six diodes, the control system comprising: an electronic control unit configured to execute three-phase ON control such that two transistors connected in parallel to the first transistor are switched ON when a condition i) is satisfied, the first transistor being one of the transistor of the six transistors and in which the short-circuit fault has occurred, i) a recovery loss of a first diode that is one of the six diodes in which a reverse recovery current is generated is estimated to be smaller than a recovery tolerance. 2 . The control system according to claim 1 , wherein the recovery loss is estimated to be smaller than the recovery tolerance when a reverse direction voltage acting on the first diode is smaller than a predetermined voltage. 3 . The control system according to claim 1 , wherein the recovery loss is estimated to be smaller than the recovery tolerance when a rotation speed of a rotating electric machine driven by the inverter is lower than a predetermined rotation speed. 4 . The control system according to claim 1 , wherein the recovery loss is estimated to be smaller than the recovery tolerance when a value of a forward direction current passing through the first diode is smaller than a predetermined current value. 5 . The control system according to claim 1 , wherein the recovery loss is estimated to be smaller than the recovery tolerance when a product of a value of a forward direction current passing through the first diode and a reverse direction voltage acting on the first diode is smaller than a predetermined value.
Assignees
Inventors
Classifications
by static converters · CPC title
- H02M1/32Primary
Means for protecting converters other than automatic disconnection · CPC title
Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load · CPC title
Diode reverse recovery losses · CPC title
Plural converter units in cascade (push-pull DC/DC converters with pre-regulator H02M3/3374; DC-AC converters following a DC-DC stage including a high frequency transformer H02M7/4807; DC-AC converters following a DC-DC conversion stage generating periodically varying voltages H02M7/4826) · CPC title
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- What does patent US2016248317A1 cover?
- A control system includes an electronic control unit. The electronic control unit is configured to execute three-phase ON control such that two transistors connected in parallel to the first transistor are switched ON when a condition i) is satisfied, The first transistor is one of the transistor of the six transistors and in which the short-circuit fault has occurred. The condition i) is that …
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H02M1/32. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Aug 25 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).