DIRECT CURRENT ELECTRIC DRIVE Russian patent published in 1997 - IPC

FIELD: home appliances, regulation of rotation frequency of direct current electric motors which are supplied from alternating current supply line. SUBSTANCE: device has collector direct current electric motor, power gate, rectifying bridge, rotation frequency setter, voltage stabilizer. Diode, inverting Schmidt flip-flop, amplitude clipper and corresponding connections between elements are introduced to accomplish the goal of invention. Power gate is designed using field-effect transistor. EFFECT: increased dynamic range of electric motor rotation frequency regulation, minimal radio interference level, increased linearity of regulation. 2 dwg