ABB AC Motor High Voltage HXR500

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Q:Which price is higher, AC motor or direct current motor? Which one has a longer service life?
The DC motor, relying on power, motor rotation, heat production, but the effect is better. Therefore, when in use, according to the needs of choice.
Q:Brushless AC motor
1, direct current motor with DC, AC motor with alternating current;2, the DC motor needs a reversing device, which is divided into brush and brush. The brush DC motor is changed by commutator, and the brushless motor is reversed by circuit logic;3, AC motor is divided into three-phase AC motor (divided into: synchronous and asynchronous), single-phase AC motor.4, the difference between AC asynchronous motors and synchronous motors is that the rotor of induction motors is non-magnetic (usually copper and aluminum), and the rotor of synchronous machines is permanent (or rather Yu Yongci).5, the difference between single-phase AC motor and DC motor: single-phase DC motor stator or rotor is a permanent magnet (or the equivalent of a permanent magnet, namely: the fixed polarity does not change), and the rotor single-phase AC motor is non magnet, also does not need to be electrified (usually cage). If the single-phase AC electric current is applied to the brushless DC motor, the motor can be operated without the power supply reversing logic circuit.
Q:How to control the speed of AC motor
The method of increasing rotor circuit startup is applicable to wound rotor, deep groove rotor and double cage rotor. For squirrel cage rotors, this method cannot be used.When increasing the rotor resistance of an induction motor, the maximum torque of the motor will not be affected, but the maximum torque will occur, and the motor torque slip curve will be compressed along the slip axis. As the motor curve shows that the slip ratio rises first and then decreases, the starting torque of the motor will increase. But its numerical value is affected by the maximum torque of the motor.The starting modes of single-phase asynchronous motor include capacitor start, resistance start, PTC start and so on.
Q:Can AC motors be converted into generators?
At present in the society is widely used in three-phase asynchronous motor, JO2, JO2L, JO3, JO4, JO3L, and Y series, the series of motor power is less than four thousand watts, the connection method most star / triangle, a voltage of 380 volts or 220 volts (Y/ 380/220) 4 thousand watt motor more power, the connection is basically only a triangle connection method is only applicable to 380 volts. (J, J1, J2, JO, JO1 series of old power, regardless of size, are most suitable for two 380/220 and two Y/ voltage delta connection, because the loss is now rarely used)
Q:Why is an AC motor more popular than a direct current motor? System description, thank you.
The reason of AC motor is common and convenient power supply: power generator and transformer, transmission and distribution in the form of communication, AC power supply, the utility grid can be directly used for AC motor is simple and convenient; DC motor to be alternating to direct before use, trouble.2, AC motor especially the induction motor, has the advantages of simple structure, easy manufacture, convenient installation, reliable use, low cost, high efficiency; and the DC motor is complicated in structure, manufacture and installation of trouble, use is not reliable, high cost, low efficiency.
Q:Who knows the main difference between DC motor and AC motor, I hope to say a little more simple, thank you
The direct current motor introduces the current into the rotor armature through the brush and commutator, so that the rotor is forced in the stator magnetic field to rotate. AC motor (AC asynchronous motor to commonly used as an example) is the alternating current into the stator winding, resulting in a rotating magnetic field in stator and rotor air gap, rotating magnetic field induced current in the rotor winding, the rotor stress in the stator magnetic field generated in the rotation.
Q:How can the electricity of household electricity be connected to the three wire motor?
The three lines of the brushless DC motor are equivalent to the U, V and W three phase lines of the AC motor, which are respectively connected with the three phase line of the drive;If the current of the motor after the connection is large, vibration and abnormal rotation, then the order of the three wires in turn until the motor is running properly;One of the switched States turns the motor clockwise, the other turns the motor counter clockwise, and the other state of the motor does not function properly.
Q:What about the capacitance of the AC motor?
If the capacity is constant (refer to kvar), the pressure will decreaseIf the pressure level has not changed, the capacitance is too large, no problemCapacitor selection depends mainly on voltage and capacity, while the capacitance is proportional to the capacity and inversely proportional to the square of the voltageYou also have an understanding of the problem, the capacitor in question is that the capacitor is too large, only the capacity is too largeIf this is the case, the capacitance will be reduced when the voltage level is constant. The larger is undesirable, but as a matter of fact, the assembly will cause damage to the capacitor
Q:Is the single-phase carbon brush motor a direct current motor or an AC motor?
(1) motor is a DC motor with single-phase brushless motor or AC, there is also some DC motor AC and DC motor, such as most of the pistol electric drill AC and DC motor, AC and DC power can also be used to use.(2) the power supply of rectifier bridge is not from positive and negative pole, and the power supply of rectifier bridge must have positive and negative poles, otherwise it is not power supply of rectifier bridge.(3) bidirectional thyristor should be used in AC circuit. If your motor speed is bidirectional thyristor, it may be AC and DC motor.DC motor carbon brush and AC motor carbon brush is the same, so there are AC and DC dual series motor.
Q:How do I know whether the motor is a direct current motor or an AC motor?
Look at the nameplate, such as AC 220, V is AC motor, DC 220 V is DC motor!

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