Speed control drive circuit for blower motor

Electricity: motive power systems – Plural diverse motor controls – Running-speed control

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Details

318798, 318810, 318438, H02P 500

Patent

active

061182397

ABSTRACT:
Drive circuit for a blower motor employs a microprocessor control element, a controlled rectifier to provide DC power at a controlled rail voltage, and an inverter employing a pair of switching transistors arranged as a bridge inverter or half-bridge inverter. The drive circuit operates over a range of blower speeds and varies both the frequency and amplitude of bipolar pulses that are applied to the blower motor armature.

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