Frequency-changing speed regulation driver by supplying power to both ends of windings of Three-phase asynchronous motor |
Title： |
| Frequency-changing speed regulation driver by supplying power to both ends of windings of Three-phase asynchronous motor |
|
Application Number： |
02117868 |
Application Date： |
2002/05/24 |
Announcement Date： |
2002/11/13 |
Pub. Date： |
|
Publication Number： |
1379543 |
Announcement Number： |
1159837 |
Grant Date： |
2004-7-28 |
Granted Pub. Date： |
2004-7-28 |
ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
H02P 7/36, H02P 7/628 |
Applicant(s)： |
Tsinghua Univ |
Inventor(s)： |
Li Yongdong, Liu Yongheng, Hou Xuan |
Key Words： |
Frequency-changing speed regulation driver,supplying power, both ends,Three-phase asynchronous motor |
Abstract： |
This invention relates to a frequency-varying speed-regulating driver of three-phase asynchronous motor, which is characterized by the supply of power at each end of three-phase stator winding of the asynchronous motor with a group of frequency-varying drive main circuits and the use of digital circuit composed of micro-processor to form PWM control signals to unifiably control two groups of mutually independent main circuits. An inversion circuit is composed of high-performance field-control switch device and rectifier circuit is composed of noncontrolled rectifier bridge. The controller circuit generates pulse-width modulation signal frequency fixed at a value in the range of 1KHz-20KHz unchanged with the output frequency. This invented driver is used in speed modulation of high voltage large volume motor with no high voltage withstand requirement on needed elements. |
Claim： |
|
Priority： |
|
PCT： |
|
LegalStatus： |
|
 Relevancy information |
|
|
|
| Other Patents of Same Inventor |
|
|
|
|
| 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. |
|
|
