Title:
三相交流電動機の駆動方法および駆動装置
Document Type and Number:
Japanese Patent JP7172550
Kind Code:
B2
Abstract:
To provide a driving method and a driving device of a three-phase AC motor, which can smoothly switch operation of a plurality of three-phase AC motors only by electric control without using mechanical switching components.SOLUTION: When a winding position of a first drum 41 or a second drum 42 is detected in an operation pump designation processing section 85, a proximity switch 87 or 88 is turned ON, and a reversing electromagnetic contactor 86 operates interlockingly therewith. For example, a positive phase contactor MC in an oil feed pump switching control section 81 is turned ON by ON of the proximity switch 87, and positive phase power supply flows to a feeder line to be supplied to an output section 83. When a three-phase AC power supply of a positive phase is supplied via a slip ring 82 in the output section 83, the contactor MC1 is turned ON by turning ON only opposite phase relay RPR1 in opposite phase relays RPR1 and 2 and the positive phase power supply is supplied only to a drive motor m1 to drive an oil feed pump 1.SELECTED DRAWING: Figure 4
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Inventors:
Yuki Sakuraba
Toshiaki Sato
Toshiaki Sato
Application Number:
JP2018235240A
Publication Date:
November 16, 2022
Filing Date:
December 17, 2018
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
H02P5/46; H02K7/116
Domestic Patent References:
| JP59026000U | ||||
| JP3158136U | ||||
| JP2014030351A | ||||
| JP4047354U | ||||
| JP10066250A | ||||
| JP54010776B2 |
Attorney, Agent or Firm:
Hiroya Naya
Yuko Hirata
Yuko Hirata
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