R2F30 OMRON

R2F30 OMRON

Motor torque characteristics

In order to improve the torque characteristics of motors, many scholars and research institutions have made bold attempts and innovations in the structural design of permanent magnet synchronous motors, and have made many new progress. In order to solve the contradiction between slot width and tooth width, transverse flux machine technology has been developed. The armature coil and tooth slot structure are vertical in space, and the main magnetic flux flows along the axial direction of the motor, improving the power density of the motor; Adopting a double-layer permanent magnet arrangement increases the quadrature axis conductivity of the motor, thereby increasing the output torque and maximum power of the motor; Change the stator tooth shape and magnetic pole shape to reduce torque ripple of the motor, etc. Weak magnetic expansion ability

After adopting weak magnetic control, the operating characteristics of permanent magnet synchronous motors are more suitable for the driving requirements of electric vehicles. Under the same power requirements, the inverter capacity is reduced and the efficiency of the drive system is improved. Therefore, permanent magnet synchronous motors for electric vehicle driving generally use weak magnetic field expansion. For this reason, domestic and foreign research institutions have proposed various solutions, such as adopting a double stator structure and using different windings at different speeds to maximize the utilization of the permanent magnet magnetic field; Adopting a composite rotor structure, the rotor adds a reluctance section to control the reactance parameters of the motor’s direct and quadrature axes, thereby increasing the motor’s speed expansion ability; The stator adopts deep grooves to increase the direct axis leakage reactance and expand the speed range of the motor.

Motor Control Theory

Due to the nonlinear and multivariable characteristics of permanent magnet synchronous motors, their control difficulty is high, and the control algorithm is complex. Traditional vector control methods often cannot meet the requirements. For this reason, some advanced control methods have been applied in permanent magnet synchronous motor speed control systems, including adaptive observers, model reference adaptation, high-frequency signal injection method, fuzzy control, genetic algorithm and other intelligent control methods. These control methods do not rely on the mathematical model of the controlled object, adaptability, and robustness

Indramat TDM 3.2-030-300 W1

Indramat MAC041C-0-TS-2-E/50-A-0/S007

Indramat TDM 1.2-100-300-W1 TDM1.2-100-300-W1

INDRAMAT TDM-1.2-100-300-W1 TDM1.2-100-300-W1

INDRAMAT EDSM2.1 DSM 2.1

Indramat MKD041B-144-KP1-KN

INDRAMAT TVM-1.2-050-W0-220V

Classified by the supply method of excitation current

Permanent magnet synchronous motor is a synchronous motor that uses permanent magnets to establish an excitation magnetic field. The stator generates a rotating magnetic field, and the rotor is made of permanent magnet material. Synchronous motors require a DC magnetic field to achieve energy conversion, and the DC current that generates this magnetic field is called the excitation current of the motor.

Separately excited motor: A motor that obtains excitation current from other sources.

Self excited motor: A motor that obtains excitation current from the motor itself.

Classified by power supply frequency

Permanent magnet brushless motors include two types: permanent magnet brushless DC motors and permanent magnet brushless AC motors, both of which require variable frequency power supply when operating as motors. The former only requires a square wave inverter for power supply, while the latter requires a sine wave inverter for power supply.

Classification by air gap magnetic field distribution

Sine wave permanent magnet synchronous motor: The magnetic poles are made of permanent magnet material, and when inputting three-phase sine wave current, the air gap magnetic field is distributed according to a sinusoidal pattern, abbreviated as a permanent magnet synchronous motor.

Trapezoidal wave permanent magnet synchronous motor: The magnetic pole is still made of permanent magnet material, but the input square wave current and air gap magnetic field are distributed in a trapezoidal wave, and the performance is closer to that of a DC motor. The self-control variable frequency synchronous motor composed of trapezoidal wave permanent magnet synchronous motor is also known as a brushless DC motor.