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Pressure Control of Hydraulic Pump using SR Drive with Pressure Predict and Direct Torque Control Method  

Lee, Dong-Hee (경성대 전기전자메카트로닉스공학부)
Seok, Seung-Hun (경성대 대학원 전기공학과)
Liang, Jianing (경성대 대학원 산업시스템공학과)
Ahn, Jin-Woo (경성대 전기전자메카트로닉스공학부)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.13, no.3, 2008 , pp. 171-178 More about this Journal
Abstract
Pressure control of hydraulic pump using SRM with pressure predictor and direct torque control method is presented in this paper. Nowadays, high efficiency and high performance motor drive is much interested in hydraulic pump system. But the hydraulic pump system has an inherent defect that its dynamic behavior causes by interaction between the sensor and hydraulic load. It will make low performance of whole system, even unstable and oscillatory. Proposed system integrates pressure predictor and direct instantaneous torque control (DITC). The pressure predictor includes Smith predictor, which is easy to improve unstable or long oscillation in traditional negative feedback control and popular PID control architectures. And DITC method can reduce inherent torque ripple of SRM, and develop smooth torque to load, which can increase stability and improve the torque response of SR drive. So high dynamic performance and stabilization can achieved proposed hydraulic system. At last, the proposed hydraulic system is verified by simulation and experimental results.
Keywords
Hydraulic pump; SRM(Switched Reluctance Motor); Pressure Predict; Direct Torque Control;
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