ELECTRIC EQUIPMENT

• US 20180348261A1
• Filed: 05/30/2018
• Published: 12/06/2018
• Est. Priority Date: 05/31/2017
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Okamoto, Noriaki, Shimada, Masahiro, Kochi, Naoto, Hashino, Satoshi, Fujita, Satoru
• Granted Patent: US 10,663,493 B2
• Time in Patent Office: Days
• CPC Class Codes: G01R 15/202 using Hall-effect devices Hall elements in arrangements for measuring electrical power G01R21/08
• CPC Class Codes: G01R 15/207 Constructional details independent of the type of device used
• CPC Class Codes: G01R 19/15 Indicating the presence of current
• CPC Class Codes: G01R 19/2513 Arrangements for monitoring electric power systems, e.g. power lines or loads; Logging
• CPC Class Codes: Y02T 10/92 Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles

Abstract

An electric current sensor of electric equipment includes a detection element, a reference voltage line to which a reference voltage signal is transmitted, an output signal line to which an output signal of the detection element is transmitted, and a ground line connected to a ground potential. The reference voltage line, the output signal line, and the ground line are bundled together by a cylindrical member which does not contain metal, and in this state, the reference voltage line, the output signal line, and the ground line are routed inside a casing containing a reactor, and connected to a control device.

Claims

1. Electric equipment comprising:

a reactor;

a switching element connected to the reactor;

a control device configured to control switching of the switching element; and

an electric current sensor provided around the reactor, and configured to detect electric current flowing through an electric power line,

wherein the electric current sensor includes;

a detection element;

a reference voltage line to which a reference voltage signal is transmitted;

an output signal line to which an output signal of the detection element is transmitted;

a ground line connected to a ground potential, and

wherein in a state in which the reference voltage line, the output signal line, and the ground line are bundled together by a cylindrical member which does not contain metal, the reference voltage line, the output signal line, and the ground line are routed inside a casing containing the reactor, and connected to the control device.

2. The electric equipment according to claim 1, wherein a plurality of the electric current sensors are provided inside the casing;

and

for each of the plurality of electric current sensors, in a state where the one reference voltage line, the one output signal line, and the one ground line are inserted into the one cylindrical member, and bundled together, the one reference voltage line, the one output signal line, and the one ground line are routed inside the casing, and connected to the control device.

3. The electric equipment according to claim 1, wherein in a state where the reference voltage line, the output signal line, and the ground line are twisted from one another, and the reference voltage line, the output signal line, and the ground line are inserted into the cylindrical member and bundled together.

4. The electric equipment according to claim 1, wherein a plurality of the electric current sensors are provided inside the casing,

wherein the plurality of electric current sensors include:

a common reference voltage line to which a reference voltage signal is transmitted;

a first output signal line and a second output signal line to each of which an output signal of the detection element is transmitted individually; and

a common ground line connected to a ground potential, and

wherein in a state where the reference voltage line, the first output signal line, the second output signal line, and the ground line are inserted into the one cylindrical member and bundled together, and the reference voltage line, the first output signal line, the second output signal line, and the ground line are routed inside the casing, and connected to the control device.

5. The electric equipment according to claim 1, wherein the control device is configured to switch the switching element using a maximum switching frequency included in a range of 10 to 20 kHz.

6. The electric equipment according to claim 1, wherein the reference voltage line, the output signal line, and the ground line bundled with the cylindrical member are provided substantially in parallel with an axis of the reactor inside the casing.

7. The electric equipment according to claim 6, wherein the reactor is a magnetic coupling type reactor including four winding parts.

8. The electric equipment according to claim 1, wherein the detection element is a Hall element;

and

the output signal line is an output signal line of an operational amplifier configured to output a voltage difference of two output lines connected to the Hall element.