Automatic bus voltage adjustment control system

Claim 2

A bus voltage control system for a plurality of motors: 1, 2, .... (n-1), n operated in parallel comprising a. means for deriving n electrical signals which are functions of the speeds selected for the motors respectively, b. means for selecting one electrical signal from among the n electrical signals which is a function of the lowest speed motor, and c. means for adjusting the magnitude of said bus voltage in response to said one electrical signal.

Claim 3

A bus voltage control system for a plurality of motors, 1, 2, .... (n-2), (n-1), n operated electrically in parallel, comprising a. means for deriving a voltage signal for each motor of said plurality as a function of the speed selected for each of said motors respectively, b. means for selecting the voltage signal of lowest magnitude from among such a plurality of voltage signals, and c. means for adjusting the magnitude of said bus voltage as a function of said selected lowest magnitude voltage signal.

Claim 4

A bus voltage control system for a plurality of motors, 1, 2, .... (n-2), (n-1), n operated electrically in parallel, comprising a. means for deriving a voltage signal for each motor of said plurality as a function of the speed selected for each of said motors respectively, b. means for selecting the voltage signal of lowest magnitude from among such a plurality of voltage signals, and c. means for adjusting the magnitude of said bus voltage as a function of said selected lowest magnitude voltage signal.

Claim 5

A bus voltage control system for a plurality of motors, 1, 2, .... (n-1), n operated in parallel, comprising a. means for deriving n electrical signals which are functions of the speeds selected for the motors respectively, b. means for selecting one electrical signal from among the n electrical signals, which selected signal is a function of the motor of lowest speed, c. means for receiving said one selected electrical signal and providing a limited linear output, and d. means for receiving said limited linear output and delivering a bus voltage, variable within a predetermined range which is a function of said one selected electrical signal.

Claim 6

A bus voltage control system for a plurality of motors, 1, 2, .... (n-1), n operated in parallel, comprising a. means for deriving n electrical signals which are functions of the speeds selected for the motors respectively, b. means for selecting one electrical signal from among the n electrical signals, which selected signal is a function of the motor of lowest speed, c. means for receiving said one selected electrical signal and providing a limited linear output, and d. means for receiving said limited linear output and delivering a bus voltage, variable within a predetermined range which is a function of said one selected electrical signal.

Claim 7

A bus voltage control system for a plurality of motors 1, 2 .... (n-1), n operated in parallel comprising a. means for adjusting the speed of said n motors, b. means coupled to said speed adjusting means for deriving n electrical signals which are functions of said adjusted speed respectively, c. means for normalizing said n electrical signals on the basis of a predetermined electrical magnitude, d. means for selecting one electrical signal from among the normalized n electrical signals, which selected signal is representative of the lowest speed motor, e. means for receiving said selected electrical signal and delivering an output within a predetermined signal range, and f. means for receiving said predetermined signal range oUtput and delivering a bus voltage variable in accordance with the speed of the lowest motor.

Claim 8

A bus voltage control system for a plurality of motors 1, 2 .... (n-1), n operated in parallel comprising a. means for adjusting the speed of said n motors, b. means coupled to said speed adjusting means for deriving n electrical signals which are functions of said adjusted speed respectively, c. means for normalizing said n electrical signals on the basis of a predetermined electrical magnitude, d. means for selecting one electrical signal from among the normalized n electrical signals, which selected signal is representative of the lowest speed motor, e. means for receiving said selected electrical signal and delivering an output within a predetermined signal range, and f. means for receiving said predetermined signal range oUtput and delivering a bus voltage variable in accordance with the speed of the lowest motor.

Claim 9

A bus voltage control system for a plurality of motors 1, 2, .... (n-1), n, operated in parallel from a power supply comprising a. means for adjusting the speed of said n motors, b. means coupled to said speed adjusting means for developing n electrical signals which are functions of said adjusted speeds respectively, c. means for normalizing said n electrical signals on the basis of a predetermined electrical signal magnitude, d. means for selecting one electrical signal from among the normalized n electrical signals, which selected signal is representative of the lowest speed motor, e. means for receiving said selected electrical signal and delivering a voltage regulator reference signal which is a function of the lowest speed motor, and f. means for voltage regulation coupled to said power supply, adapted to receive said voltage regulator signal and deliver a control signal which adjusts the output magnitude of said power supply as a function of the lowest speed motor.

Claim 10

A bus voltage control system for a plurality of motors 1, 2, .... (n-1), n, operated in parallel from a power supply comprising a. means for adjusting the speed of said n motors, b. means coupled to said speed adjusting means for developing n electrical signals which are functions of said adjusted speeds respectively, c. means for normalizing said n electrical signals on the basis of a predetermined electrical signal magnitude, d. means for selecting one electrical signal from among the normalized n electrical signals, which selected signal is representative of the lowest speed motor, e. means for receiving said selected electrical signal and delivering a voltage regulator reference signal which is a function of the lowest speed motor, and f. means for voltage regulation coupled to said power supply, adapted to receive said voltage regulator signal and deliver a control signal which adjusts the output magnitude of said power supply as a function of the lowest speed motor.

Claim 11

A bus voltage control system according to claim 5 in which a. said selecting means comprises diode selection network means electrically arranged to block all said normalized n electrical signals but said one selected electrical signal.