Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Running-speed control
Reexamination Certificate
2005-04-27
2009-02-17
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Running-speed control
C318S104000, C318S626000
Reexamination Certificate
active
07492111
ABSTRACT:
The invention relates to a method of controlling two or more commutator DC motors with permanent magnets in driving mechanisms for setting a position of furniture parts such as tables, beds, chairs etc., where particular driving mechanisms must maintain mutually defined speed independently on their different load. The invention consists in that during functioning of the motors is periodically disconnected power supply of the motors, while in the time of disconnecting the supply is detected the voltage of each motor, which is adjusted using calibration constant characteristic for each motor and the direction of rotation and according to the differences of such adjusted voltages of particular motors is adjusted the operating mode of each motor, by means of which is reached an effective regulation of particular motor run to mutually defined speed independently on their load. The invention also relates to a device for controlling two or more commutator DC motors with permanent magnets in driving mechanisms for setting a position of furniture parts such as tables, beds, chairs etc., where particular driving mechanisms must maintain mutually defined speed independently on their different load. The device consists of at least one power supply, with which are through power management blocks of particular motors coupled at least two motors, while with each motor is by its first input coupled a multiplier, where with its second input is coupled a calibration constant block, while the outputs of the multipliers are connected to the inputs of the first comparison element, whose outputs are connected to the inputs of a regulator, whose outputs are connected to the inputs of the power management blocks of particular motors, while on the second input of the regulator is by its output connected a timer clock.
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Patent Abstract of Japan vol. 0009, No. 225 (E-342) Sep. 11, 1985.
E.C. Sys S.R.O.
Linet Spol.S.R.O.
Ostrolenk Faber Gerb & Soffen, LLP
Ro Bentsu
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