Small appliance driven by unidirectional single-phase synchronou

Details Small appliance driven by unidirectional single-phase synchronou Small appliance driven by unidirectional single-phase synchronou

1987-03-31

1988-07-26

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

30 4392, 74 5R, 310 41, 310 51, H02K 524, F16F 1512

Patent

active

047602970

ABSTRACT:
A small domestic appliance is driven by means of a single-phase synchronous motor (2) whose drive shaft (5) drives a load (9), the work function being independent of the direction of rotation of the motor and the operating noise and vibrations produced by the motor being dependent on the direction of rotation of the motor. In the transmisson system a unidirectional blocking device (41) forces the rotor to start in the optimum direction of rotation. In particular, the single-phase synchronous motor (2) including its transmission path to the load (9) is constructed that the optimum operating noise is obtained in that direction of rotation in which the torque exerted on the rotor (3) by the stator current becomes zero before the magnetic detent torque has become zero, when the stator coils (4d) are not energized. This has led to a stable rest position.

REFERENCES:
patent: 4236426 (1980-12-01), Meinke et al.
patent: 4313823 (1982-02-01), Locker
patent: 4606121 (1986-08-01), Diefenbach et al.
patent: 4656376 (1987-04-01), Hyldal

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