Programmable electronic speed control

Details Programmable electronic speed control Programmable electronic speed control

1979-06-11

1982-01-26

Truhe, J. V.

Electricity: motive power systems

Synchronous motor systems

Armature winding circuits

318723, 318807, 318812, 318345H, 222 63, H02P 758

Patent

active

043130755

ABSTRACT:
A programmable electronic speed control for controlling the speed of a motor responsive to an ac signal source. A triac switch is interposed between the ac signal source and the motor. A programmable digital counter is connected between the ac signal source and the triac switch. The programmable counter counts zero voltage crossings of the ac signal generated by the ac signal source and repetitively causes the triac switch to alternately pass and block selectable numbers of cycles of the ac signal to the motor. The speed of the motor is determined by the relationship between the selectable numbers of cycles of the ac signal which are alternately passed and blocked by the triac switch. The speed control is particularly suited for use in controlling the pump motor and/or the program timer motor in a beverage dispensing machine.

REFERENCES:
patent: 2536400 (1951-01-01), Thompson
patent: 3307094 (1967-02-01), Ogle
patent: 3659169 (1972-04-01), Waddicor
patent: 4037757 (1977-07-01), Green

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