Wolong Electrical Group Co.

Shangyu, China

Wolong Electrical Group Co.

Shangyu, China
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Rao H.,Nanchang University | Dong X.,Nanchang University | Gong H.,Wolong Electrical Group Co.
Advanced Materials Research | Year: 2012

A code control mechanism (CCM) was proposed in this paper to solve the complex many-to-many mapping problem in lifting appliances safety evaluation, in which, the complicated many-to-many constraints relation is replaced by the character string. The novel method can reduce the redundant data tables and improve the system efficiency. CCM can be extended to realize the object-typed many-to-many mapping in other area. © (2012) Trans Tech Publications, Switzerland.


Lin W.,Hangzhou Dianzi University | Lin W.,Wolong Electrical Group Co. | Li D.,Hangzhou Dianzi University | Wu Q.,Hangzhou Dianzi University | And 3 more authors.
IFAC-PapersOnLine | Year: 2015

Comparative studies on several direct torque control (DTC) strategies of interior permanent magnet synchronous motor (IPMSM) for electric vehicles (EVs) are discussed in details, namely basic DTC, DTC combined with space vector modulation (DTC-SVM), and deadbeat DTC (DB-DTC). These DTC strategies are reviewed, meanwhile dynamics and steady-state performance are analyzed and compared. Simulations of a 20kW IPMSM for EVs are carried out for comparison studies including: ripple of torque and stator flux, sensitivity to machine's parameter, computational complexity, and total harmonic distortion of stator current. The results can be used as guidance for application of IPMSM to EVs and others.


Lin W.,Hangzhou Dianzi University | Lin W.,Wolong Electrical Group Co. | Lin W.,Zhejiang University | Ren J.,Hangzhou Dianzi University | And 2 more authors.
Chinese Control Conference, CCC | Year: 2015

Comparative studies on several direct torque control (DTC) strategies of interior permanent magnet synchronous motor (IPMSM) for electric vehicles (EVs) are discussed in details, namely basic DTC, DTC combined with space vector modulation (DTC-SVM), and deadbeat DTC (DB-DTC). These DTC strategies are reviewed, meanwhile dynamics and steady-state performance are analyzed and compared. Simulations of a 20kW IPMSM for EVs are carried out for comparison studies including: torque and stator flux ripple, machine parameter sensitivity, computational complexity and stator current total harmonic distortion. The results can be used as guidance for application of IPMSM to EVs and others. © 2015 Technical Committee on Control Theory, Chinese Association of Automation.


Zhu X.,Zhejiang Water Conservancy and Hydropower College | Chen S.,Wolong Electrical Group Co. | Wu L.,Zhejiang Water Conservancy and Hydropower College | Yao W.,Zhejiang Water Conservancy and Hydropower College
Applied Mechanics and Materials | Year: 2013

Regulated DC-DC converter and unregulated DC-DC transformer is the basic types of DC-DC converter. Now the research is focusing on the regulated form named regulated LLC resonant DC-DC converter. Unregulated form of LLC resonant DC-DC converter named LLC resonant DC-DC transformer is studied in this paper in order to increase the practical topology of soft-switching and high-efficiency DC-DC transformer. Design method is proposed by the gain curve analyze of LLC resonant DC-DC transformer, and load characteristic of gain and efficiency of the DC-DC transformer is analyzed specializing for optimal design. A LLC resonant DC-DC transformer prototype is designed and implemented. Experimental results verify the correctness and validity of the design method and the load characteristic analysis. © (2013) Trans Tech Publications, Switzerland.


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WOLONG Electrical GROUP Co. | Date: 2011-04-12

Electric generators; dynamos; motors and engines except for land vehicles.

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