Intelligent power module
AssigneeMitsubishi Electric Corporation
InventorsTakatoshi Yasui, Takahiko Murakami, Akira Yamamoto, Yoshikazu Tsunoda
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Abstract
An object of the present invention is to synchronize PWM between individual phases of an IPM, so that the IPM has a simplified-scale circuit. An IPM according to the present invention includes a DC-DC converter including a multi-phase arm having a plurality of phase arms connected in parallel on a secondary side, a secondary-wire-voltage detection circuit configured to detect a secondary wire voltage in each phase arm of the DC-DC converter, and a synchronization-signal generation circuit configured to generate a synchronization signal in each phase arm on the basis of the behavior of the secondary wire voltage.
Claims7
An intelligent power module comprising:
- a DC-DC converter comprising a multi-phase arm comprising a plurality of phase arms connected in parallel on a secondary side;
- a secondary-wire-voltage detection circuit configured to detect a secondary wire voltage in each phase arm of the DC-DC converter;
- a synchronization-signal generation circuit configured to generate a synchronization signal in each phase arm on the basis of behavior of the secondary wire voltage;
- a temperature detection circuit configured to detect a temperature in each phase arm and obtain the temperature as temperature data;
- a PWM modulation circuit configured to modulate the temperature data through PWM;
- and
- a photocoupler configured to transmit the temperature data that has undergone PWM modulation to a primary side of the DC-DC converter, wherein
- the PWM modulation circuit is configured to perform PWM modulation using a PWM carrier wave that is synchronous with the synchronization signal.
Dependencies are inferred from the claim text.