Patents Assigned to Antonio Merloni S.p.A.
  • Method of operating an inverter for powering an induction motor
    Patent number: 5990655
    Abstract: An inverter is operated to eliminate hiss in the control of the speed of an induction motor using an inverter of variable frequency. The voltage is matched to the selected frequency to avoid such hiss and control of the voltage is effected by regulating spacing between the pulses outputted by the pilot unit to the gates of the MOSFETs or IGBTs forming the arms of the inverter.
    Type: Grant
    Filed: August 11, 1997
    Date of Patent: November 23, 1999
    Assignee: Antonio Merloni S.p.A.
    Inventor: Jose Escudero
  • Piloting system for electric inverter
    Patent number: 5859769
    Abstract: The MOSFETs or IGBTs of respective arms of an electronic inverter are in series with SCRs or TRIACs triggered into conduction during intervals of intended conduction of the respective MOSFETs or IGBTs connected to the high level rectifier terminal. The piloting of the SCRs or TRIACs is effected from the piloting of the MOSFETs or with delay or in a conditional manner. The circuit eliminates the effective transience on the inverter output.
    Type: Grant
    Filed: July 15, 1996
    Date of Patent: January 12, 1999
    Assignee: Antonio Merloni S.p.A.
    Inventor: Jose Escudero
  • Washing procedure and washing machine for the performance of the aforementioned procedure
    Patent number: 5832553
    Abstract: A washing procedure with a washing machine composed of alternate agitation (A) and agitation stoppage (S) phases for the laundry in a washing mixture (M) and a simultaneous phase, in which the washing mixture (M) is heated. Pursuant to the invention, the phases comprising the agitation stoppage (S), scheduled according to an established washing cycle, are either extended or reduced (T2, T2'), according to the extension or reduction of the heating time for the washing mixture (M) caused by variations in the electric current, while the number of agitation (A) and agitation stoppage (S) phases and the duration (T1) of the agitation phases (A) remain constant. For the execution of this procedure, the washing machine has programming devices (12) for the washing cycle, devices to measure the electric current and processors to measure variations in the duration of the agitation stoppage phases according to variations in the electric current measured against a standard nominal value (14, 15, 16).
    Type: Grant
    Filed: March 24, 1997
    Date of Patent: November 10, 1998
    Assignee: Antonio Merloni S.p.A.
    Inventor: Antonio Merloni
  • Three-phase electronic inverter for variable speed motor
    Patent number: 5489833
    Abstract: A three-phase electronic inverter for an electric induction motor can operate the latter silently without the generation of magnetorestriction noise where the voltage of the rectifier outputted to the power transistor bridge is controlled by a TRIAC with regulation of the angle of conduction while the power transistor are pulsed in response to the output of a microprocessor through level adapters constituted by operational amplifiers.
    Type: Grant
    Filed: May 31, 1994
    Date of Patent: February 6, 1996
    Assignee: Antonio Merloni S.p.A.
    Inventor: Jose Escudero