Miniature inverters aim for white goods
An
Allegro Microsystems product story
Edited by the Engineeringtalk editorial team
Apr 3, 2003
At PCIM 2003 Allegro MicroSystems Europe will present a new family of miniature high-current motor drive inverter modules aimed at providing energy and power savings in white-goods applications.
At the 2003 PCIM Exhibition, Allegro MicroSystems Europe will present a new family of miniature high-current motor drive inverter modules aimed at providing energy and power savings in white-goods applications.
Developed by Allegro's parent company, Sanken Electric, the three different modules use miniature transfer-mould power package technology and multichip power ICs with a high degree of integration.
They combine IGBTs (insulated gate bipolar transistor), which provide low saturation voltage, optimised fall time and high short-circuit robustness, with low-voltage fast recovery diodes (FRDs).
The first module is an IGBT/FRD array, which has six sets of devices in one package and provides half the heat resistance of a conventional SLA single-inline package for a three-phase bridge.
The second module is an integrated MCM (multichip module) which incorporates one IGBT and one FRD along with a high-voltage integrated circuit and control circuitry based on Sanken's BCD bipolar/CMOS/DMOS process.
The third device is an integrated power module incorporating a number of functions including a power resistor to detect the motor current and three diodes to provide a bootstrap circuit.
The new inverter modules offer improvements in the saturation voltage and switching time of IGBT and the speed and voltage capabilities of the FRD.
A key benefit of these modules for the white-goods market is that they are produced on an existing mass-production line which also produces modules for the audio-visual and automotive market alongside motor-driver inverter modules, allowing the production of semicustom devices.
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