Title:
COMPOSITE DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/248705
Kind Code:
A1
Abstract:
[Problem] To provide a composite device that can contribute to the miniaturization of vehicle air conditioners, etc., and to suppress an increase in switching loss while preventing damage caused by the surge voltage of switching elements used for power supply in the composite device. [Solution] In a composite device having a refrigerant compression function and a heat medium heating function, the switching frequency of second switching elements Q7, Q8 of a heater control circuit that controls an electric heater for heating a heat medium is lower than the switching frequency of first switching elements Q1-Q6 of a motor drive circuit that drives an electric motor for driving a compression mechanism, the switching speed of the second switching elements Q7, Q8 is slower than the switching speed of the first switching elements Q1-Q6, and the parasitic inductance of the wiring related to the first switching elements Q1-Q6 is smaller than the parasitic inductance of the wiring related to the second switching elements Q7, Q8.
Inventors:
SAITO ATSUSHI (JP)
Application Number:
PCT/JP2023/019677
Publication Date:
December 28, 2023
Filing Date:
May 26, 2023
Export Citation:
Assignee:
SANDEN CORP (JP)
International Classes:
F04B39/00; H02M7/48
Foreign References:
| JPH11115467A | 1999-04-27 | |||
| JP2012127328A | 2012-07-05 | |||
| JP2016096680A | 2016-05-26 |
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