Method of controlling the commutation in an electronically...

Details Method of controlling the commutation in an electronically... Method of controlling the commutation in an electronically...

2006-02-07

2006-02-07

Ip, Paul (Department: 2837)

Electricity: motive power systems

Limitation of motor load, current, torque or force

C318S245000, C318S254100, C388S811000

Reexamination Certificate

active

06995534

ABSTRACT:
A method is disclosed for controlling the commutation in an electronically commutated motor (20) which comprises a stator having at least one phase (24, 26), and a permanent-magnet rotor (22), and with which a current limiter (36, 58) and a controller (18) for regulating a motor variable are associated. The current limiter (36, 58) serves to limit the current (I) in the at least one phase (24, 26) to a setpoint value. The regulation by means of the controller (18) is accomplished by modifying the distance in time (W) between switching on (t1) and switching off (t2) of the current (i1, i2) in the at least one phase. In this method, the setpoint value to which the current limiter limits the current (i1, i2) in the relevant phase is modifiable. It is modified substantially as a function of a ratio of two times (W/T), namely as a function of the ratio of the distance in time (W) between switching on (t1) and switching off (t2) of the current (i1, i2) in the relevant phase (24, 26) to the time period (T) required by the rotor, at the instantaneous rotation speed, to rotate through a specified rotation angle. A decrease in noise at low rotation speeds is thereby made possible.

REFERENCES:
patent: 4473781 (1984-09-01), Nielsen
patent: 5093891 (1992-03-01), Komiyama et al.
patent: 5207520 (1993-05-01), Tanaka
patent: 5246479 (1993-09-01), Gami et al.
patent: 5845045 (1998-12-01), Jeske et al.
patent: 6013966 (2000-01-01), Fehrenbacher et al.
patent: 6091887 (2000-07-01), Dieterle et al.
patent: 6396226 (2002-05-01), Schmider et al.
patent: 6429615 (2002-08-01), Schmider et al.
patent: 6703803 (2004-03-01), Ohiwa et al.
patent: 2001/0003412 (2001-06-01), Schmider et al.
patent: 2001/0004194 (2001-06-01), Schmider et al.
patent: 2003/0155886 (2003-08-01), Ohiwa et al.
patent: 39 19 952 (1990-12-01), None
patent: 0 452 497 (1991-04-01), None
patent: 0 666 424 (1995-08-01), None
patent: 0 908 630 (1998-08-01), None
patent: 0 657 989 (1999-04-01), None
patent: 1 107 441 (2001-06-01), None
patent: 2475312 (1981-08-01), None

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