专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

4. 发明专利

JPH08251983A CONTROLLER FOR VARIABLE-SPEED ELECTRIC MOTOR 失效
公开(公告)号：JPH08251983A
公开(公告)日：1996-09-27
申请号：JP3707196
申请日：1996-02-01
申请人： SGS THOMSON MICROELECTRONICS
发明人： JIYANNMARIE SHIYARUTON
IPC分类号： H02P7/06 , H02K11/02 , H02P7/282 , H02P7/29 , H02P7/295
摘要： PROBLEM TO BE SOLVED: To decrease a desired number of cells in a chopper by a constitution wherein at least one winding of a motor forms a cell for filtering the perturbation of radio frequency generated through switching along with a capacitor for filtering the switching peak. SOLUTION: The stator winding of a motor 1 or one inductance L1 includes the inductance of a first cell for filtering the perturbation of radio frequency. A controller is previously provided with a chopper including a switch K of power MOS transistor, for example. A capacitor C for filtering the switching peak of the switch K is inserted between a second terminal N and a first brush B1. The capacitor C is related to the inductor L1 in order to form an LC cell for filtering the perturbation of radio frequency.

5. 发明专利

JPH07231691A DRIVER FOR BLOWER 失效
公开(公告)号：JPH07231691A
公开(公告)日：1995-08-29
申请号：JP2031994
申请日：1994-02-17
申请人： RINNAI KK
发明人： OTSUKA JUNJI
IPC分类号： F04D27/00 , H02M7/12 , H02M7/217 , H02P7/295 , H02P5/175
摘要： PURPOSE:To provide a driver for a blower, which can protect the capacitor of a smoothing circuit from overvoltage, in the driver of a blower which smooths the power signal being outputted intermittently from the switching circuit controlled intermittently by a power supply control circuit, by means of a smoothing circuit using a capacitor, and supplies it to a blower. CONSTITUTION:This driver is equipped with a power supply stop means 11 which stops the power supply to a smoothing circuit 4 when the voltage of the capacitor 6 of the smoothing circuit 4 reaches the specified overvoltage or over. The power supply stop means 11 is composed of a voltage detecting circuit 12 which detects the voltage of the capacitor 6, a switch circuit 43 which is connected to the signal transmitting path 41 of a power supply control circuit 10, and a switch driving circuit 44 which drives the switch circuit 43 when the voltage of the capacitor 6 reaches the overvoltage or over.

你已经成功收藏专利！

检索式保存成功!

IPRDB