Single-phase motor double capacitor six terminals how to connect the capacitor and the outgoing line positive inversion
A single-phase motor has two windings, a main winding and a pay winding, the main winding mainly to provide running power, pay winding mainly to provide the starting pitch and control steering.
Second, in general, the main winding is directly connected to the power supply, pay winding to be connected to the power supply through the inverting capacitor; so directly to the zero line and the fire line can not achieve the single-phase motor forward and reverse control.
Detailed explanation:
1, there are two sets of coils inside the single-phase motor, one set is the running coil (main coil), one set is the starting coil (secondary coil), most of the motor's starting coil is not only start after the start is not used.
2, but always work in the circuit. The starting coil resistance is larger than the running coil resistance, just measure it. The start coil has a capacitor in series. That is to say, the start coil with capacitor in series is connected in parallel with the running coil, and then connected to 220V voltage, which is the connection method of the motor.
3, when this series of capacitor start coil and running coil in parallel, parallel two butt wire head and tail to determine the forward and reverse. It is much more difficult to control a single-phase motor than a three-phase motor for forward and reverse.
4, a single-phase motor has a start capacitor, run capacitor, centrifugal switch and other auxiliary devices, complex structure; two because the single-phase motor run winding and start winding is not the same, can not be used for each other, increasing the difficulty of the wiring, get it wrong, you may burn the motor.
Single-phase motor maintenance methods:
Professional motor maintenance and repair centre motor maintenance process: cleaning the stator and rotor → replacement of carbon brushes or other parts → vacuum class F pressure dip paint → drying → school dynamic balance.
1, the use of the environment should always be kept dry, the motor surface should be kept clean, the air inlet should not be obstructed by dust, fibres, etc..
2,When the thermal protection of the motor continuously operates, it should find out whether the fault comes from the motor or the overload or the setting value of the protection device is too low, and put it into operation only after eliminating the fault.
3, should ensure that the motor in the operation of good lubrication. General motor running 5000 hours or so, that should be supplemented or replaced grease, found in the operation of the bearing overheating or lubrication deterioration, hydraulic pressure in time to change the grease. Replacement of grease, the old lubricant should be removed, and there is petrol to wash the bearing and bearing cover of the oil groove, and then ZL-3 lithium grease to fill the cavity between the inner and outer rings of the bearing 1/2 (for 2 poles) and 2/3 (for 4, 6, 8 poles).
4,When the life of the bearing ends, the vibration and noise of the motor operation will increase obviously, check the radial clearance of the bearing reaches the following values, then the bearing should be replaced.
5,When disassembling the motor, it is OK to take out the rotor from the shaft extension or non-extension end. If it is not necessary to remove the fan, it is more convenient to take out the rotor from the non-extended end. When pulling out the rotor from the stator, it should be prevented from damaging the stator winding or insulation.
6, when replacing the winding must note down the original winding form, size and number of turns, wire gauge, etc., when the loss of these data, should be obtained from the manufacturer, change the original design of the winding, often make the motor a certain or several performance deterioration, or even unusable.
