Questions about single phase motor windings ?

If you only mean ordinary fan (table fan, floor fan) motor (because ceiling fan motors are also single-phase motors), then try the following:

The single-phase power supply itself can only make the main winding produce a magnetic field with alternating changes of magnetic poles, but there is no rotating magnetic field, and the rotor will not rotate, so in order to produce a rotating magnetic field, the starting winding is designed. The starting winding is used in series with a capacitor in the circuit, and through the phase shift of the capacitor, the main and starting windings cooperate to generate a rotating magnetic field to rotate the motor rotor, so it is called the starting winding.

The starting winding, also known as the secondary winding, is only related to the smoothness of the motor start-up and post-start operation (auxiliary drive motor). In fact, when the motor rotates, even if the starting winding is disconnected, the rotor will continue to rotate (poor stability). Power design of the starting winding.

As far as the starting itself is concerned, the power of the starting winding does not need to be large (the winding resistance is large); However, with a larger load, the power of the starting winding can be increased (the winding resistance is small) to assist the drive motor and maintain the normal speed.

The weight and wind resistance of the ceiling fan blades are much greater than those of table fans and floor fans, so the starting winding resistance is designed to be small in order to obtain enough power to assist the normal operation of the main winding driving load.

As for the resistance you said is smaller than the main winding, I haven't measured it, so it's doubtful.

Questions about "single-phase motor windings"?

First, the following figure gives the various classification forms of single-phase motor windings and three-phase motor windings in detail for reference.

Second, in general, when repairing, in principle, it is carried out in accordance with the principle of drawing a scoop according to the gourd, without full certainty and sufficient experience, it is strictly forbidden to change the original design scheme without authorization! Otherwise, once the original data is lost, it will be difficult to recover it.

1. A single winding is a coil that makes up each pole.

2. Double winding is two identical (or concentric) windings to form an electrode, and some are called single sets of bags and double sets of bags. Like a washing machine motor, if the starting winding is double winding, it is eight coils to form four poles, and a single winding is four coils to form four poles.

Summary. Hello.

Winding data collection of some single-phase motors.

Place of Origin: Shandong Wendeng Motor Factory Model: YC290L4-2 Power:

Main winding: 3 enameled wires.

Pay winding:90

Main winding: 7 turns, 9 turns, 14 turns, 15 turns, 15 turns.

Pay winding: 15 turns, 25 turns, 34 turns.

Core size: inner diameter 76 length 152

Place of Origin: Weihai Evergrande Motor (Group) **** Model: YC290L4-2 Power:

Main Winding: Pay Winding:

Main winding: 7 turns, 10 turns, 14 turns, 14 turns, 14 turns.

Pay winding: 12 turns, 23 turns, 34 turns.

Core size: inner diameter 76 length 152

Place of Origin: Shandong Wendeng Hengda Motor Factory Model: YC290L4-2 Power:

Main Winding: Pay Winding:

Main winding: 7 turns, 10 turns, 13 turns, 14 turns, 14 turns.

Pay winding: 7 turns, 18 turns, 28 turns.

Core size: inner diameter 76 length 152

Dear This question is up to me, it takes a little time to type, and please be patient Hello. Winding data collection of some single-phase motorsPlace of Origin: Shandong Wendeng Motor Factory Model:

YC290L4-2 Power: Main Winding: Enameled Wire 3 Kernel Code Root Winding:

90 main winding: 7 turns 9 turns 14 turns 15 turns 15 turns pay winding:

15 turns 25 turns 34 turns core size: inner diameter 76 length 152 Place of origin: Weihai Evergrande Motor (Group) **** Model:

YC290L4-2 Power: Main Winding: Pay Winding:

Main winding: 7 turns 10 turns 14 turns 14 turns 14 turns pay winding: 12 turns 23 turns 34 turns Core size:

Inner diameter 76 length 152Place of Origin: Shandong Wendeng Hengda Motor Factory Model: YC290L4-2 Power:

Main Winding: Pay Winding: Main Winding:

7 turns 10 turns 13 turns 14 turns 14 turns 14 turns pay winding: 7 turns 18 turns 28 turns iron core size: inner diameter missing 76 length 152

In the first step, use a multimeter to find the two leads with the highest resistance out of the three leads, and the remaining one is the common end lead where the main and secondary windings are connected. If the resistance between leads A and C is the largest in the figure above, then lead B is the common end lead.

In the second step, use a multimeter to measure the resistance between the common end lead and the other two leads, and the winding connected between the common end lead and one of the leads with the greater resistance is the secondary winding.

In the third step, the main winding is connected between one of the less resistive leads. As shown in the figure, the resistance between the lead BC is large, and the lead C is the secondary winding lead. The resistance between AB is small, and lead A is the main early winding lead.

Summary. Dear and hello, the main winding and auxiliary winding of the single-phase motor are composed of armature winding and starting winding respectively. The armature winding is the main working part of a single-phase motor, the purpose of which is to generate a rotating magnetic field and convert mechanical energy into electrical energy.

The armature windings usually have a higher number of turns, which allows for higher output power and efficiency of the motor. The starter winding, on the other hand, is mainly used for starting and actuating, and has a relatively small number of turns, usually a small fraction of the armature winding. Therefore, the main winding of a single-phase motor is usually composed of an armature winding, while the secondary winding with fewer turns is the starting winding.

Of course, the specific design and application conditions will also have an impact on the ratio of turns of the main and secondary windings, which needs to be selected and adjusted according to the actual situation.

The main and auxiliary windings of a single-phase motor have the same wire diameter, and the main winding or the auxiliary winding has more turns?

Dear and hello, the main winding and auxiliary winding of the single-phase motor are composed of armature winding and starting winding respectively. The armature winding is the main working part of a single-phase motor, the purpose of which is to generate a coarse rotating magnetic field and convert mechanical energy into electrical energy. The armature windings usually have a higher number of turns, which allows for higher output power and efficiency of the motor.

The starting winding, on the other hand, is mainly used for starting and actuating, and has a smaller number of turns than the side stool, usually a small fraction of the armature winding. Therefore, the main winding of a single-phase motor is usually composed of an armature winding, while the secondary winding with fewer turns is the starting winding. Of course, the specific design and application conditions will also have an impact on the ratio of turns of the main and secondary windings, which needs to be selected and adjusted according to the actual situation.

Hello dear, is this what you need to know?

Yes, it belongs to a closed loop.

The most commonly used in power systems are three-winding transformers. Using a three-winding transformer to connect a transmission system with three different voltages is economical, occupies less space, and is more convenient for maintenance and management than using two ordinary transformers. Three-phase three-winding transformers usually adopt the Y-Y- connection method, that is, the primary and secondary windings are Y-connection, and the third winding is connected.

The connection itself is a closed loop, which allows the third harmonic current of the same phase to pass through, so that the third harmonic voltage does not appear in the primary and secondary windings of the y connection. In this way, it can provide a neutral point for both the primary and secondary edges. In long-distance transmission systems, the third winding can also be connected to a synchronous condenser to increase the power factor of the line.