[The no ring start] [Central starter manufacturers, [ring starter] Image Product Description and characteristics JR, JZR, YR, YZR, three-phase wound rotor AC induction motor (also known as slip ring motor ). Since its rotor external resistance or reactance, high power factor and high starting torque at start, in the fields of metallurgy, machinery, chemicals, mining, building materials commonly used in this motor to Drag the device. Slip ring, carbon brushes, short-circuit ring is mounted on the motor shaft parts, they relay in the control box, AC contactor, frequency sensitive rheostat and other electrical components to form a complete system of the secondary circuit, as motor starting and means of running shorting. This way of working of the motor has the following disadvantages: 1, carbon brush is easy to wear, excessive consumption, the amount of maintenance, and affect the normal production. Between brush and slip ring is easy to produce sparks, some places can not be used. 3, brush and slip ring friction, increases the contact resistance, the motor temperature rise. 4, conductive powder is easily inhaled inside the motor and is a serious hazard of burning motor. 5, the time relay runaway easy to burn out the AC contactor and frequency sensitive rheostat, resulting in downtime discontinued. WSQ3 brushless ring starter is also just overcome shortcomings. It eliminates the need for slip rings, carbon brushes and secondary loop system, no spare parts, reduce the amount of maintenance, to ensure the safe operation of the motor, once installed, is currently a leading position in the domestic long-term benefit starting equipment. Brushless ring starter the principle WSQ3 brushless Kai starter is the the BP4 the frequency sense rheostat work of evolution, it uses the best principles of magnetic circuit and the best magnetic materials the original secondary circuit system contact element electromagnetic circuit, consisting of a non-contact electromagnetic components, made through a process innovation variable resistance starter as a startup device. It by the motor during starting, the rotor current frequency with the rotor speed increases and reduces the relationship, i.e. the rotor speed changes from 0 to the nominal rotational speed Ne, the rotor current frequency from 50 Hz to smoothly reduced to l-2 Hz, STARTING impedance by the maximum displacement to a minimum, equivalent to the resistance of the rotor circuit external from maximum to minimum, it can be automatically attached to the rotor frequency change for smooth adjustment, it is an ideal starting device. The use of range and technical parameters where the original use of BPL frequency sensitive the BP4 frequency sense rheostat, resistance box start JR, JZR, YR, YZR three-phase wound rotor induction motor (except for variable speed), can be used QXQ brushless starter ring to replacement, replacement of the same operating characteristics. With motor capacity 380V/ll-280Kw; 3KV, 6KV/200-560Kw. Drag devices such as: ball mill, fans, air compressors, pumps, conveyors, rubber mixing machine, driving claw bucket elevator, oxygen machine, mill. Regardless of the positive, and occasionally more frequent starting, can be used Brushless ring rheostat starter. l, light-load starting: MST ≥ 0.6-0.8Me, Ist ≤ 3-3.5Ie, Tst