Title:
METHOD FOR USING ELECTRICAL EQUIPMENT
Document Type and Number:
Japanese Patent JP2014169794
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To prevent electric corrosion from occurring in accordance with drive frequency.SOLUTION: In a method of using electrical equipment comprising a control circuit for controlling a drive frequency of an inverter motor, and a bearing disposed at a position within 1 m from a control circuit, and including a plurality of rolling elements including at least one insulative rolling element having an electrical resistance value of 10Ω-cm or more, the number of insulative rolling elements are controlled so as to satisfy an expression of P×M≥60F, where the number of insulative rolling elements is defined as P (the number), the number of revolutions of the bearing is defined as M (rpm) and a drive frequency of the inverter is defined as F(Hz) while the drive frequency of the inverter motor is controlled by the control circuit to 50 Hz or more and 4,000 Hz or less.
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Inventors:
TAKAO MINORU
Application Number:
JP2014115635A
Publication Date:
September 18, 2014
Filing Date:
June 04, 2014
Export Citation:
Assignee:
TOSHIBA CORP
TOSHIBA MATERIALS CO LTD
TOSHIBA MATERIALS CO LTD
International Classes:
F16C33/32; F16C19/06; H02K5/16; H02K5/173
Domestic Patent References:
| JPH07222360A | 1995-08-18 | |||
| JPH01108426U | 1989-07-21 | |||
| JP2001214937A | 2001-08-10 |
Attorney, Agent or Firm:
Patent business corporation cherry tree international patent firm