Power-supplying device and wireless power supply system
US-2015372502-A1 · Dec 24, 2015 · US
Contactless electric power transmission device and electric power transfer system
US10404101B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10404101-B2 |
| Application number | US-201615383280-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 19, 2016 |
| Priority date | Dec 24, 2015 |
| Publication date | Sep 3, 2019 |
| Grant date | Sep 3, 2019 |
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- Title
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- Abstract
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- First independent claim
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- CPC / IPC classifications
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- Citations and related patents
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Abstract
Official abstract text for this publication.
A contactless electric power transmission device includes a power transmission assembly, a first temperature sensor, a second temperature sensor, and an electronic control unit. The first temperature sensor is configured to detect a temperature of an inverter. The second temperature sensor is configured to detect a temperature of a resonance circuit. The electronic control unit is configured to adjust the frequency by controlling the inverter. The electronic control unit is configured to perform first control when the temperature of the inverter is higher than the temperature of the resonance circuit, and perform second control when the temperature of the resonance circuit is higher than the temperature of the inverter. The first control includes control for adjusting the frequency so as to reduce output current of the inverter. The second control includes control for adjusting the frequency so as to reduce current flowing through the resonance circuit.
First claim
Opening claim text (preview).
What is claimed is: 1. A contactless electric power transmission device comprising: a power transmission assembly including an inverter, a filter circuit, and a resonance circuit, the inverter being configured to produce alternate current power having a given frequency, the resonance circuit being configured to receive the alternate current power from the inverter via the filter circuit, and contactlessly transmit the alternate current power to an electric power receiving device; a first temperature sensor configured to detect a temperature of the inverter; a second temperature sensor configured to detect a temperature of the resonance circuit; and an electronic control unit configured to adjust the frequency of the alternate current power by controlling the inverter, the electronic control unit being configured to perform first control when the temperature of the inverter is higher than the temperature of the resonance circuit, and perform second control when the temperature of the resonance circuit is higher than the temperature of the inverter, the first control including control for adjusting the frequency so as to reduce output current of the inverter, the second control including control for adjusting the frequency so as to reduce current flowing through the resonance circuit. 2. The contactless electric power transmission device according to claim 1 , wherein: the electronic control unit is configured to perform the first control, when the temperature of the inverter is higher than the temperature of the resonance circuit, and the temperature of the inverter exceeds a first threshold temperature; and the electronic control unit is configured to perform the second control, when the temperature of the resonance circuit is higher than the temperature of the inverter, and the temperature of the resonance circuit exceeds a second threshold temperature. 3. The contactless electric power transmission device according to claim 1 , wherein: the electronic control unit is configured to perform the first control, when the temperature of the inverter is higher than the temperature of the resonance circuit, and a difference between the temperature of the inverter and the temperature of the resonance circuit is larger than a first threshold value; and the electronic control unit is configured to perform the second control, when the temperature of the resonance circuit is higher than the temperature of the inverter, and a difference between the temperature of the resonance circuit and the temperature of the inverter is larger than a second threshold value. 4. The contactless electric power transmission device according to claim 1 , wherein: the first control includes continuously varying the frequency over an adjustable range of the frequency, and adjusting the frequency to a frequency at which the output current of the inverter is smallest in the adjustable range; and the second control includes continuously varying the frequency over the adjustable range of the frequency, and adjusting the frequency to a frequency at which the current flowing through the resonance circuit is smallest in the adjustable range. 5. An electric power transfer system comprising: an electric power transmission device; and an electric power receiving device configured to contactlessly receive electric power from the electric power transmission device, wherein: the electric power transmission device includes a power transmission assembly, a first temperature sensor, a second temperature sensor, and an electronic control unit; the power transmission assembly includes an inverter, a filter circuit, and a resonance circuit; the inverter is configured to produce alternate current power having a given frequency; the resonance circuit is configured to receive the alternate current power from the inverter via the filter circuit, and contactlessly transmit the alternate current power to the electric power receiving device; the first temperature sensor is configured to detect a temperature of the inverter; the second temperature sensor is configured to detect a temperature of the resonance circuit; the electronic control unit is configured to adjust the frequency of the alternate current power by controlling the inverter; the electronic control unit is configured to perform first control when the temperature of the inverter is higher than the temperature of the resonance circuit, and perform second control when the temperature of the resonance circuit is higher than the temperature of the inverter; the first control includes control for adjusting the frequency so as to reduce output current of the inverter; and the second control includes control for adjusting the frequency so as to reduce current flowing through the resonance circuit.
Assignees
Inventors
Classifications
Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil · CPC title
exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV] · CPC title
in response to temperature · CPC title
Plug-in electric vehicles · CPC title
Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors · CPC title
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Frequently asked questions
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- What does patent US10404101B2 cover?
- A contactless electric power transmission device includes a power transmission assembly, a first temperature sensor, a second temperature sensor, and an electronic control unit. The first temperature sensor is configured to detect a temperature of an inverter. The second temperature sensor is configured to detect a temperature of a resonance circuit. The electronic control unit is configured to…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification B60L53/12. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Sep 03 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).