ABB AC Motor High Voltage NV Series

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Q:What does permanent magnet brushless motor and brushless DC motor mean?
Speed control system composed of permanent magnet synchronous motor used to be called the sinusoidal permanent magnet synchronous motor (PMSM) speed control system; and the trapezoidal wave (Fang Bo) speed control system composed of permanent magnet synchronous motor, the principle and control methods of DC motor and similar, so this system for brushless DC motor (BLDCM) synchronous motor speed control system, Fang Bo is also known as the brushless DC motor (or square wave motor).
Q:Braking principle of 220V alternating current motor
LZ is trying to understand the principle of an ordinary two-phase AC motor? The function of an electric motor is to convert electrical energy into mechanical energy. Motor is divided into alternating current motor and direct current motor two major categories.
Q:Causes of insulation breakdown in AC motor voltage withstand test
In the withstand test, the test voltage is too high and exceeds the specified value.
Q:In the main circuit of AC motor, fuse can be used as short circuit protection, can it play the role of overload protection at the same time, why?
Therefore, the overload protection of the motor requires the use of a thermal relay that can accumulate heat effects. When the accumulated heat reaches a certain degree, the protection is started, and the motor is not allowed to continue heating up.
Q:How does the PLC control the speed of the motor?
See what you choose the motor, the general AC motor does not need PLC, you can use the frequency converter speed, how much speed you can change the frequency of inverter output current. If it is a stepping motor or a private server, a drive is needed, and a PLC is used to send a pulse control drive to drive the motor. PLC each sends a pulse, the motor turns an angle.
Q:Why are DC motors more powerful than AC motors of the same power?
Because the motor armature circuit resistance and inductance are small, and the rotating body has certain mechanical inertia, so when the motor is switched on, starting the beginning of the armature speed and anti electromotive force of the corresponding small starting current, large. Up to 15~20 times the rated current. This current will disturb the power grid, the unit will be subjected to mechanical shocks, and the commutator will spark. Therefore, the direct closing start is only applicable to motors with power not greater than 4 kW (starting current is 6~8 times the rated current).
Q:Why is DC motor wider than AC motor? High speed regulation accuracy? How do you know?
The DC motor has the ability to keep the rated torque from the zero speed to the nominal speed, so it can perform stepless speed regulation from zero speed to rated speed (constant torque).
Q:What is AC motor?
AC motor has become the most common motor because of the great development of AC power system.Compared to the AC motor and DC motor, because there is no commutator (see DC motor commutation), therefore has the advantages of simple structure, convenient manufacture, relatively strong, easy to make high speed motor, high voltage, high current, large capacity. The coverage of AC motor power greatly, from a few watts to several 101000 watts, even millions of kilowatts. In the early 1980s, the largest turbo generator reached 1 million 500 thousand kilowatts.AC motors are usually divided into AC generators, AC motors and synchronous regulators according to their functions. Due to the reversibility of the working state of the motor (see the motor), the same motor can be used as a generator and an electric motor. It is not very precise to divide the motor into generator and motor, but some motors are mainly used as generator, some motors are mainly motor operated.
Q:What's the difference between a three-phase AC motor and a DC motor?
AC motor shell usually made from cast iron, only as a function of protecting and supporting the motor; and DC motor shell is made of steel or steel, except for the protection and support of motor, or part of the magnetic circuit;
Q:How much does 15kw power AC power consume per hour?
KW 1 hours of electricity is common sense, but there is a problem of motor efficiency and power, that is to say the motor to reach the rated value at full load working condition, if it is light load or no load may not every KW of electricity, if overloading or frequent start maybe more electricity. For reference only!

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