Variable frequency driving device of 3KV-10KV middle-high voltage multi-level three-phase AC motor
Title：
Variable frequency driving device of 3KV-10KV middle-high voltage multi-level three-phase AC motor
Application Number：
 200410009469
Application Date：
 2004/08/20
Announcement Date：
 2005/03/23
Pub. Date：
 2006/08/16
Publication Number：
 1599233
Announcement Number：
 1270438
Grant Date：
 2006-8-16
Granted Pub. Date：
 2006-8-16
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 H02P 27/06, H02M 5/458
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Li Yongdong, Gao Yue
Key Words：
 Variable frequency, driving device, 3KV-10KV middle-high voltage, multi-level, three-phase AC, motor
Abstract：
 The frequency conversion driving gear of the 3KV-10KV middle and high voltage multilevel three-phase alternating current motor belongs to the field of the high voltage converter technique. The main circuit is composed of the multi-winding assistant side phase shifting isolating transformer and several H bridge power units with the three levels of alternating-direct- alternating. The commutation part of every power unit is three-phase diode commutate with no controlling, the middle direct current tache connects with the capacitor parallelly and the inverted part is the three-level H bridge construction and adopts the diode clamp or the capacitor clamp three-level structure. The voltage of the unit clamping capacitor is controlled dynamicly. The main switch devices can choose the corresponding withstand voltage and current power semiconductor switch devices according to the difference of the grades of the output voltage and the current. Several groups of power unit output are in the form of Y after being connected in series. The controller takes the high performance digital signal microprocessor as the center to form the PWM control signal and dynamicly controls the balance of the voltage of the power unit clamping capacitor. It reduces the number of the assistant boarders of the phase shifting transformer and decreases the cost. The dynamic control policy adopted by the voltage of the clamping capacitor increases the performance.
Claim：
Priority：
PCT：
LegalStatus：

Recommend this patent:
1 2 3 4 5
Average ( 0 votes):
                                                                          Recommended Patents>>

Relevancy information



Other Patents of Same Inventor

Frequency-changing speed regulation driver by supplying power to both ends of windings of Three-phase asynchronous motor
Multi-level frequency conversion driving apparatus with energy conservation unit
Clamping five level variable frequency driving device utilizing internal and external ring double-group rectifier bridge



News & Events More>>

Last Update  
2008-4-17
  Selected patents owned by Tsinghua University filed in 2005 are loaded.
2008-3-31
  Selected patents owned by Tsinghua University filed in 2006 and 2007 are load.







Copyright 2008-2015 All Rights Reserved Patent License of China.      Designed by Easygo