Vestas Wind Systems A/s

Rockwell Automation Asia Pacific Business Centre Pte. Ltd.

Rockwell Automation Asia Pacific Business Center Pte. Ltd.

Tai Hock Khoo

Eng Kian Kenneth Sng

Michael Casem Tumabcao

Ji Qian

Chia Leong Chin

Yanfeng Zhang

Yee Shing Chew

Kok Kiong Lee

A high-speed input circuit for industrial control provides an optoisolator protected by a series current regulator and shunting voltage regulator. The combined effect of the regulators is to allow the input circuit to work over a wide range of voltages while providing extremely fast response time.

High-speed input circuit

A wind turbine generator comprising: an electrical generator configured to generate AC signals, a plurality of power converters operated by a gating signal, each power converter configured to convert the AC signals from electrical generator into fixed frequency AC signals, a transducer configured to measure the combined output from the power converters, and a controller configured to phase-displace the gating signal of one of the power converters to substantially minimize harmonic components of the combined output.

Phase-displacement of a power converter in a wind turbine

Growing community of inventors

Singapore, Singapore

Tai Hock Khoo