Q:The calculation method of the weight of copper wire used for ac motor

It is usually a cable-like cable which is twisted by several or several sets of wires (at least two of each set), which is insulated from each other

Q:Why is a single phase ac motor that can be adjusted by voltage

Synchronous motor torque = motor power/(2 * PI * RPM / 60) N · m. 2, the frequency of the alternating current (ac) of 50 hz, synthesis of the synchronous speed of the magnetic field of 50 r/s, which is 3000 r/min, if motor more than a pair of poles, further analysis can also get synchronous speed. 3, 4 pole synchronous speed is 1500r/min, 6 pole synchronous speed is 1000r/min, 8 pole synchronous speed is 750r/min. The asynchronous motor speed = (60 * frequency/logarithmic) times the error rate. 5, the synchronous motor stator voltage is reduced, according to article 1, motor torque, asynchronous motor, conforms to article 4 formula, slip is less than 1, motor speed down. If the torque of the motor is in balance with the external resistance torque, the slip rate is stable, the speed is stable and the motor is successful. After the 5th and 6th, the stator voltage of the motor is improved, and the process is reversed. The voltage regulation is implemented in this way.

Q:The properties of the single phase magnetic electromotive force of ac motor, the amplitude of its amplitude, the position of amplitude, and the frequency of the pulsations are related to the various factors

The magnetic field generated from the electrotechnics, the three-phase alternating current (ac) is a rotating magnetic field, its speed n1 depends on current frequency f and rotating magnetic field of magnetic pole logarithmic p1, the relationship between them is: n1 = 60 f/p1

Q:The difference between dc motor and ac motor

The speed adjustment method is different: The reason that the stator magnetic field is rotating is the three-phase symmetric alternating current which is 120 degrees behind each other, and the stator field is changed by alternating current. By changing the speed of alternating current changes, the speed of the motor can be changed. Dc power supply, dc motor is the same constant voltage, and the coil connected to the actual location change of formation, and connected to the coil of the actual location of the change only associated with the speed of the rotor rotation; As long as the speed of the rotor is changed, the rotor speed is proportional to the voltage, and the change of voltage can change the speed, which is the speed adjustment.

Q:Single phase capacitor ac motor speed regulation why does not have corresponding frequency converter

It is suitable for low load, such as fan, blower, exhaust fan, etc. The voltage is reduced, the strength of the winding is reduced, the rate of change increases, and the speed decreases. If the load is larger, the voltage is reduced by the lower voltage, and the power of the motor is reduced, and the coil is likely to be overcharged and the coil is hot and burnt. A fan without a speed governor is more than one way of controlling silicon.

Q:How does the brush motor control the positive and backward rotation?

With the dc motor and ac motor, dc motor can change the polarity of the input power supply and change the rotation direction of the motor. The ac motor can change the rotation direction of the machine by adjusting the two wires of the carbon brush.

Q:Single phase single capacitance ac motor three wires wrong

Two of the three wires are connected to the capacitor, the other is connected to the power supply, and the motor can be operated by a single connection on the two capacitors. When another power source is replaced with a capacitor, the motor will reverse.

Q:How do I get 220v on the motor?

General three-phase motors are industrial motors, are generally three phase voltage of 220 v / 380 v, to meet the domestic load single-phase 220 v I suggest you can add a single-phase 220 v input of inverter, the inverter output voltage is 220 v three-phase can be received on the delta connection of three-phase motor. Dongguan city motor company technical staff told me.

Q:The alternating current is constantly changing, and how is the ac motor going to be controlled?

There are many methods of rotating magnetic field, such as three-phase winding, single-phase shift phase, short circuit, pulse changing phase, etc.

Q:What is the difference between ac motor and dc motor?

We know that the three-phase power supply phase phase difference is the voltage on the phase between 120 degrees, three of the three-phase asynchronous motor stator winding on the spatial orientation also sent 120 degrees, so that when zhongtong into the three-phase power supply in the stator winding, stator windings creates a rotating magnetic field, the stator windings creates a rotating magnetic field, rotor conductors (cage) will cut the lines of magnetic force of a rotating magnetic field and induced current, the current in the rotor conducting bar and interact with a rotating magnetic field to produce electromagnetic force, electromagnetic force produced by electromagnetic torque drive rotor rotating magnetic field along the direction of rotation. In general, the actual speed of the motor is below the rotational speed of the rotating field.