Electricity: motive power systems – Constant motor current – load and/or torque control
Patent
1993-01-29
1996-07-23
Wysocki, Anthony
Electricity: motive power systems
Constant motor current, load and/or torque control
318434, H02P 300
Patent
active
055392881
ABSTRACT:
A food processor is provided having a motor (18), a bowl (10) and a beater (12) which are movable relative to each other by a drive by the motor (18), a switching means (48) for switching the motor (18) on and off under the control of a start signal (START) and at least a first stop signal (STOP1) respectively, torsion measuring means (28/30, 32/34) for producing a torsion signal (TS) which is a measure for the torque necessary for the drive, a signal processing unit (42) for producing at least the first stop signal (STOP1) in response to the torsion signal (TS). The signal processing unit (42) includes a first differentiator (56) and/or a second differentiator (58) for producing the first (DTS) and the second derivative (DDTS) of the torsion signal (TS) and a comparator (62) in which the first (DTS) or second (DDTS) derivative is compared with a reference value (REF1). When the reference value is exceeded, the comparator produces a stop signal (STOP1) to switch off the motor (18). The food processor stops by itself once a predetermined bending point in the torsion signal (TS) occurs, so that it becomes possible to whip cream of varying quantity, quality and composition without supervision.
REFERENCES:
patent: 3965407 (1976-06-01), Stoner
patent: 4013895 (1977-03-01), Akiyoshi et al.
patent: 4515020 (1985-05-01), Plaquin
patent: 4608524 (1986-08-01), Yokobori
patent: 4611682 (1986-09-01), Yasuda et al.
patent: 5223778 (1993-06-01), Svarovsky et al.
patent: 5253725 (1993-10-01), Nishimoto
De Roo Petrus W. L.
Neijzen Jacobus H. M.
Van Der Sluijs Willem L. N.
Van Herk Johannes J.
Bartlett Ernestine C.
U.S. Philips Corporation
Wysocki Anthony
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