Electrically conductive path device

• US 8,982,570 B2
• Filed: 02/01/2012
• Issued: 03/17/2015
• Est. Priority Date: 02/04/2011
• Status: Active Grant

• Current Assignee: Yazaki Corporation
• Original Assignee: Yazaki Corporation
• Inventors: Toyama, Eiichi, Ogawa, Kazuyuki
• Primary Examiner(s): Phillips, Forrest M
• Application Number:
  US13/982,634
• Publication Number:
  US 20130306344A1
• Time in Patent Office: 1,140 Days
• Field of Search: 361/748
• US Class Current: 361/748
• CPC Class Codes: H01B 7/0081 Cables of rigid construction rigid-tube cables H01B7/16
• CPC Class Codes: H05K 9/0098 for shielding electrical cables

Abstract

There is provided an electrically conductive path device which can prevent radiation noise. An electrically conductive path device includes three bus bars electrically connecting a motor unit to an inverter unit, capacitance portions creating stray capacitance and an insulator. In terms of the electrically conductive path device, switching operation of a semiconductor switch located inside an inverter of the inverter unit creates change in voltage which is transmitted to the bus bar corresponding to a path from the inverter to the motor. At that time, the change in voltage is not transmitted further to the motor but is transmitted to the bus bar corresponding to a path from the motor to the inverter via the capacitance portion formed between the facing portions, i.e. via the stray capacitance.

Claims

1. An electrically conductive path device comprising:

three bus bars which electrically connect one object to the other object and

a capacitance portion for creating stray capacitance,

wherein the capacitance portion is formed between facing portions of the bus bars, and

wherein the three bus bars are formed into a same shape, and are positioned so that a surface area of the facing portions and a distance between the facing portions are uniform.

2. The electrically conductive path device according to claim 1, wherein

the object is an inverter, and the other object is a motor of a moving body,

the electrically conductive path device further comprises an impedance matching portion formed at a connection end of the bus bars.

3. The electrically conductive path device according to claim 1, wherein

the facing portions are covered with an insulator such that the facing portions are arranged with a predetermined space between each other, and

the space between the facing portions covered with the insulator is arranged in a form selected from a group of:

a hollow space, a space filled with the insulator and a space into which a dielectric material is inserted.

4. The electrically conductive path device according to claim 2, wherein

the facing portions are covered with an insulator such that the facing portions are arranged with a predetermined space between each other, and

the space between the facing portions covered with the insulator is arranged in a form selected from a group of:

a hollow space, a space filled with the insulator and a space into which a dielectric material is inserted.

5. An electrically conductive path device comprising:

two bus bars which electrically connect one object to the other object; and

a capacitance portion for creating stray capacitance,

wherein the capacitance portion is formed between facing portions of the bus bars.