Simultaneous independent control system for electric motors
First Claim
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1. A system for simultaneously and independently controlling a plurality of motors comprising:
- (a) A common power line;
(b) a plurality of motors connected to said power line;
(c) a power supply unit comprising a wide bandwidth feedback regulated amplifier and power supply for generating low voltage propulsion power for said motors to said power line;
(d) a common signal transmission cable coupled to the negative inverting input of said wide bandwidth feedback regulated amplifier and power supply;
(e) a plurality of means for generating a plurality of modulated selected frequencies and for superimposing said frequencies via said power supply unit on said low voltage propulsion power, each of said means being portable and being removably parallel coupled to said common signal transmission cable;
(f) a plurality of replaceable and interchangeable frequency selectors, one each for each one of said plurality of means for generating said plurality of modulated selected frequencies, for determining each of said selected frequencies; and
(g) a plurality of receivers coupled to said common power line, each of said receivers tuned to one of said modulated selected frequencies and associated with and controlling one of said motors.
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Abstract
A system for simultaneously and independently controlling a plurality of electric motors from a number of dispersed stations. The system operates by transmission of duty cycle modulated selected frequencies superimposed on a DC track voltage on a common power line servicing the motors. The modulation is variable and determines the speed of the motors. Transmitters are portable and designed removably to plug into a common signal transmission cable anywhere along its length without interaction. Receivers, each tuned to a specific frequency and associated with and controlling a motor, are coupled to the common power line.
93 Citations
15 Claims
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1. A system for simultaneously and independently controlling a plurality of motors comprising:
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(a) A common power line; (b) a plurality of motors connected to said power line; (c) a power supply unit comprising a wide bandwidth feedback regulated amplifier and power supply for generating low voltage propulsion power for said motors to said power line; (d) a common signal transmission cable coupled to the negative inverting input of said wide bandwidth feedback regulated amplifier and power supply; (e) a plurality of means for generating a plurality of modulated selected frequencies and for superimposing said frequencies via said power supply unit on said low voltage propulsion power, each of said means being portable and being removably parallel coupled to said common signal transmission cable; (f) a plurality of replaceable and interchangeable frequency selectors, one each for each one of said plurality of means for generating said plurality of modulated selected frequencies, for determining each of said selected frequencies; and (g) a plurality of receivers coupled to said common power line, each of said receivers tuned to one of said modulated selected frequencies and associated with and controlling one of said motors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification