To provide a power supplying device which extends the life of a semiconductor element, by suppressing the temperature ripples in the semiconductor elements of a power conversion device used in the drive circuit of a load undergoing the repetitive drive/stop of a load and a sudden change in a load amount.
AC power source 1 is converted through a converter 2 into DC and smoothed through a smoothing capacitor 3 to be supplied to an inverter device 4. The inverter device 4 includes a semiconductor element such as an IGBT, operates on a command from a control device 5 and converts the supplied DC into AC to be supplied to a motor 6. The motor 6 elevates/lowers a cage 8 and a counter weight 9 through a winding machine 7. A temperature detection means 10 detects the temperature of a semiconductor module constituting the inverter device 4, and the control device 5 controls the IGBT of the inverter device 4 to flow current, while the cage 8 is stopped, based on the detected result.
COPYRIGHT: (C)2011,JPO&INPIT
| JP2003007934A | 2003-01-10 | |||
| JPH08126308A | 1996-05-17 | |||
| JP2002101668A | 2002-04-05 | |||
| JP2005354812A | 2005-12-22 |
| WO2008078377A1 | 2008-07-03 |
Hideki Takahashi
Jiro Ozawa
Next Patent: INSULATING COIL AND ROTARY ELECTRIC MACHINE APPARATUS