FIELD: electrical engineering; control systems of slip-ring induction motors.
SUBSTANCE: proposed control device has rectifier bridge built around diodes and connected to rotor circuit of slip-ring induction motor. Rectifier bridge leads are connected to starting-and-control resistors of slip-ring induction motor. Rectifier bridge is connected to voltage divider incorporating resistors and potentiometer. Device also has two voltage regulator diodes, one of them being connected to light-emitting diode and resistor and second one, to first voltage regulator diode, potentiometer, and light-emitting diode. Device also has relay incorporating interacting light-emitting diode and optical triac. The latter is connected to switching unit. Input leads of relay are connected to potentiometer and to resistor. Switching unit is connected to starting-and-control resistors inserted in rotor circuit of motor.
EFFECT: simplified design, reduced size and input power.
1 cl, 1 dwg
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