Siemens Reducer Gear Motor

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Q:The difference between DC motor and AC motor
Master formulas n1=60f/P, S= (N1-N), /n1, n= (1-S), 60f/P, and understand their meaning (very important), and be able to flexibly use these formulas for calculations. Also remember: the slip rate of the motor at normal load is approximately SN, 0.01-0.06. The examples in the book should be emphasized.
Q:What is the stator voltage and current of an AC motor? And what is the current and voltage of the rotor?
The stator voltage and current of AC motor are determined by specification model!An AC motor, rated voltage 380V, rated current 289A, rated power 160KW,Rated voltage 380V, rated current 289A, that is, the stator parameters!The rotor is short circuited, squirrel cage, and has a strong short-circuit current to induce the magnetic field. There is no specific parameter!According to the model, there are tens to hundreds of thousands of ann!
Q:The similarities and differences between DC brushless motor and AC motor
Although the DC motor is supplied by direct current, the coil inside the rotor is still in the AC circuit. A live brush DC motor is commutated by an electric brush. And brushless motor is through the inverter circuit to DC into AC, and then to the coil. 12V cooling fans are common. It's commonly used in mainframe computers.AC motor does not need commutator (brush). Generally, permanent magnets are not needed. It would be nice to want to know more about buying a book on the principles of the motor
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?
Short circuit protection: some devices can monitor abnormal conditions in the work circuit (such as short circuits). When abnormal happens, the circuit is cut off and alarm is sent to prevent further expansion of the damageA typical short circuit protection is a fuse. When the short circuit is short, the current is very high. When the fuse is blown, the circuit will be out of power.Overload protection: to prevent the main power line from overload protection caused by overheating damage and installation of overload protection equipment
Q:How to change AC motor to generator?
Three large capacity oil immersed capacitors are added between the items, which generate voltage with the residual magnetism of the motor, but there is no good power factor
Q:Which motor has a great torque when the motor is under DC at the same power?
Ordinary (squirrel cage) AC motor starting current and start torque is small, it is much better than the start of DC motor, which is a common sense.
Q:How do ordinary AC motors brake?
Mechanical brakingBraking method using mechanical device to stop motor rapidly after stopping power supply. Such as electromagnetic brake, brake.
Q:How to realize constant power or constant torque output of three-phase AC motor?
Three phase asynchronous motor for motor operation. Three phase asynchronous motor rotor speed below the speed of a rotating magnetic field, the rotor winding magnetic field between the relative motion and the induced electromotive force and current, and electromagnetic torque and magnetic field interaction, realize the energy transformation.
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:Isn't the starting winding symmetrical? If it's symmetrical, it's also an alternating pulsating magnetic field, how can you drive the rotor?
Because the magnetic field will not rotate (single phase winding and three-phase current phase difference of 120 DEG to produce a rotating magnetic field, so the starting winding), the working principle is in the starting winding current is generated through nearly 90 degrees of the magnetic field produced by a capacitor, the rotating magnetic field.

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