Vending machine control with product delivery motor home detection, motor speed control and power supply
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United States of America Patent
Stats
-
Nov 22, 1988
Grant Date -
N/A
app pub date -
Mar 2, 1987
filing date -
Mar 2, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A vending machine control apparatus has a product delivery motor home circuit and a DC power supply modulated in response to varying line voltage and/or load by a pulse width modulation circuit. The modulated DC power signal supplies power to one or more DC product delivery motors in a vending machine. Each product delivery motor has an associated switch which passes pulses, resulting from the modulation of the power supply, when the delivery motor is in its home position. A simple motor home detection circuit detects these pulses, and preferably a microprocessor control circuit connected to the detection circuit determines that a home condition exists.
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