EMG motor Germany EMG model EMG price

EMG motor refers to a motor that can operate on both DC and AC power supplies. This type of motor is widely used in daily household appliances, manual devices, computing tools, and precision machinery. In addition, it is frequently used in medical equipment, communication technology, measurement technology, the film industry, and many other fields.

EMG motor mechanical characteristics

The reason why this motor is widely used in electric vehicles is that it has the following two advantages compared to traditional brushed DC motors: (1) Long service life, maintenance-free, and high reliability. In brushed DC motors, due to the high motor speed, the brushes and commutator wear out quickly, and the brushes generally need to be replaced after about 1000 hours of operation. In addition, the technical difficulty of the reduction gearbox is relatively high, especially the lubrication of the transmission gears, which is a major problem in brushed solutions. Therefore, brushed motors have problems such as high noise, low efficiency, and prone to failure. Thus, the advantages of brushless DC motors are obvious. (2) High efficiency and energy saving. Generally speaking, because brushless DC motors do not have friction losses from mechanical commutation, gearbox consumption, or speed control circuit losses, the efficiency is usually higher than 85%. However, considering the best cost-performance ratio in actual design and to reduce material consumption, it is generally designed to be 76%. The efficiency of brushed DC motors, due to the consumption of the gearbox and overrunning clutch, is usually around 70%.

EMG motor structure

Motor control structure: A brushless DC motor is a type of synchronous motor, meaning that the rotor speed is influenced by the speed of the stator's rotating magnetic field and the number of rotor poles (P), where N = 120 · f / P. With a fixed number of rotor poles, changing the frequency of the stator's rotating magnetic field changes the rotor speed. A brushless DC motor adds electronic control (driver) to a synchronous motor, controlling the frequency of the stator's rotating magnetic field and feeding back the rotor speed to the control center for repeated correction, aiming to achieve characteristics close to those of a DC motor. This means that a brushless DC motor can maintain a certain rotor speed within the rated load range even when the load changes. A brushless DC driver includes a power section and a control section: the power section provides three-phase power to the motor, and the control section converts the input power frequency as required. The power section can accept direct DC input (typically 24V) or AC input (110V/220 V); if the input is AC, it must first be converted to DC by a converter (converter). Whether the input is DC or AC, before entering the motor coils, the DC voltage must be converted by an inverter (inverter) into 3-phase voltage to drive the motor. The inverter (inverter) generally consists of 6 power transistors (Q1 to Q6) connected to the motor as switches to control the current flowing through the motor coils, divided into upper arms (Q1, Q3, Q5) and lower arms (Q2, Q4, Q6). The control section provides PWM (Pulse Width Modulation) to determine the switching frequency of the power transistors and the commutation timing of the inverter (inverter). Brushless DC motors are generally intended for speed control applications where the speed remains stable at the set value with minimal variation when the load changes. Therefore, the motor is equipped with hall-sensors (hall-sensor) inside to sense the magnetic field, serving as closed-loop speed control and also as the basis for phase sequence control. However, this is used only for speed control and cannot be used for position control.

EMG motor mechanical characteristics

The basic characteristics of an induction motor are that the rotor winding does not need to be connected to another power source, and its stator current is drawn directly from the AC power system. Compared with other motors, the induction motor has a simple structure, is easy to manufacture, use, and maintain, offers high operational reliability, is lightweight, and has low cost. Taking a three-phase induction motor as an example, compared with a DC motor of the same power and speed, the former weighs only half as much as the latter, and the cost is only one-third. Induction motors can also easily derive various product series to meet the requirements of different environmental conditions. They also have load characteristics close to constant speed, meeting the driving requirements of most industrial and agricultural production machinery. Its limitation is that its speed has a fixed slip relative to the synchronous speed of its rotating magnetic field (see asynchronous motor), resulting in poor speed regulation performance. In applications requiring a wide and smooth speed regulation range (such as driving rolling mills, hoists, large machine tools, etc.), it is less economical and convenient than DC motors. In addition, during operation, induction motors draw reactive power from the power system for excitation, which leads to a deterioration of the power factor of the power system. Therefore, in high-power, low-speed applications (such as driving ball mills, compressors, etc.), using synchronous motors is more reasonable. Due to the large production volume and wide application of induction motors, they are required to have a wide variety of models and specifications to match various mechanical equipment. Therefore, special attention must be paid to standardization, serialization, and generalization in the design and production of induction motors. Among various product series, the three-phase induction motor series, which has the largest output and widest application, is the basic series; in addition, there are several derived series (series derived from partial changes based on the basic series) and specialized series (series with special structures designed for special needs).

Weidou Intelligent Technology specializes in selling German EMG motors, EMG motors, EMG drives, EMG synchronous motors, EMG servo motors, EMG DC motors, EMG AC motors, EMG stepper motors, EMG synchronous motors, EMG asynchronous motors, EMG single-phase motors, EMG three-phase motors, EMG drive motors, EMG geared motors, EMG electric motors, EMG original imports from Germany. Welcome customers to inquire and order.