Electric machine driving method and system under non-conventional work mode of oil pumping unit

US10539129B2 · kind B2 · utility

Assignee

• HARBIN SURFICS ELECTRICAL TECHNOLOGY INC · CN

Inventors

• Ye Yang · Worcester, US
• Lin Wang · Qingdao, CN
• Min Zhang · San Ramon, US
• Mingting Han · Jingwei, CN
• Yanan Sun · Zhengzhou, CN
• Chunlong Sun · Jingwei, CN
• Guoqing Wang · Beijing, CN
• Hongliang Gong · Nonatum Mills, US
• Jie Zhang · Beijing, CN
• Wen Xing · Jingwei, CN
• Feng Wei · Lo Wu, CN
• Deshi Zhang · Jingwei, CN
• Jinyuan Li · Sunnyvale, US
• Chenglin Liu · Beijing, CN
• Feifei Wan · Jingwei, CN
• Yunlong Chen · Kunming, CN

Key dates

• Filing date: May 10, 2017
• Grant date: Jan 21, 2020
• Expiry date: May 10, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02P27/04
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

The present invention discloses a method and a system pertaining to the field of oil production engineering. According to the method, the crank complete-cycle operation uses a utility frequency driving mode, and the crank incomplete-cycle pumping operation and the crank incomplete-cycle no-pumping, operation use a variable, frequency driving mode. The system is provided with a utility frequency loop and a variable frequency loop which are provided with a common input terminal and a common output terminal. The common input terminal of the utility frequency loop and the variable frequency loop is connected to a utility frequency power supply circuit, and the output terminal is connected to a driving electric machine of the oil pumping unit. A frequency changer is configured in the variable frequency loop. An operation control unit is further configured outside the utility frequency loop and the variable frequency loop.