发明名称 |
STABILIZED POWER CONVERTER HAVING QUANTIZED DUTY CYCLE |
摘要 |
A multi-slice power converter (10) employs a digital circuit (22) to generate phase-delayed pulse width modulated (PWM) signals, which results in the duty cycle of the PWM signals having only a certain number of possible values. The quantization of the duty cycle is shown to result in two types of instabilities which are unique to power converters having a digital control loop, in addition to the conventional analog-type of instabilities. This invention provides novel methods and apparatus for stabilizing the digital control loop of the power converter through the use of a periodic dither signal having a frequency that is less than the PWM frequency and greater than a bandwidth frequency of the converter. The dither signal functions to effectively increase the number of possible duty cycles by a factor given by the ratio of the dither frequency to the bandwidth frequency.
|
申请公布号 |
CA2162947(A1) |
申请公布日期 |
1996.10.01 |
申请号 |
CA19952162947 |
申请日期 |
1995.11.15 |
申请人 |
SPACE SYSTEMS/LORAL, INC. |
发明人 |
CANTER, STANLEY;LENK, RONALD |
分类号 |
H02M3/155;H02M3/157;H02M3/158;(IPC1-7):H02M1/00 |
主分类号 |
H02M3/155 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|