The additional iron loss caused by the PWM component of the stator current(upgrade remote control). Due to the use of slotless windings, the inductance and leakage inductance of the motor are very small. The PWM traces of the motor phase current are particularly heavy(best electric skateboard motor). The magnetic field generated by the PWM current component will cause eddy current losses in various components of the motor, including the stator core, Stator winding and rotor components.
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Find a suitable switching frequency(electric skateboard gloves). Due to the high frequency of PWM and the large amplitude of current ripple, this part of the loss is very large. In addition, there are The literature proposes a multilayer DC link inverter (MLDCLI PWM inverter), which can effectively reduce the current ripple caused by PWM modulation(6384 sensored motor), the various losses of the motor body (especially the iron loss) are difficult to accurately calculate quantitatively, thereby effectively reducing this loss.
Aiming at the iron loss of the stator of the motor(best motor for electric skateboard), the iron loss caused by the discontinuous jump of the stator current in the rotor and the loss caused by the PWM component of the stator current, a method for reducing the loss is proposed. From the phase voltage and phase current waveforms provided in the article(belt motor 6384 190kv), the PWM component in the current is very serious, which is different from the general non-small induction motor, so the losses caused by it can not be ignored.
So it is difficult to accurately measure various losses in the motor(mini remote control). The amplitude of the current ripple can also be reduced by increasing the PWM modulation frequency, but increasing the switching frequency of the power device will also correspondingly increase the loss consumed on the power device, which requires comprehensive consideration of various factors(montainskateboard dual motor). Most of the suppression methods are considered separately. This loss is a function of the square of the current ripple.
In theory of current predictive control(electric skateboard hub motor), the commutation torque ripple of the permanent magnet brushless DC motor in the high-speed region is reduced, while the low-speed region is increased. However, in practical applications, due to the influence of motor speed, power supply voltage and other factors(6355 or 6374 brushles motor), the commutation torque ripple cannot be divided into high-speed and low-speed areas according to theoretical analysis and different suppression measures are taken.
In addition to reducing the voltage to reduce the current ripple(screen remote control), but the analysis of the causes and various influencing factors of the various losses of the motor is carried out on the motor The premise and foundation of low power control. The flywheel and the control torque gyro system are the actuators of the spacecraft attitude control system(torqueboards 6374 motor), and the low power consumption of the drive motor is one of its basic requirements.
Among them, the iron loss of the motor includes the basic iron loss, the loss caused by the discontinuous jump of the stator current and the additional loss caused by the PWM component of the stator current(electric motor for skateboard). Because the brushless DC motor in this section uses a cup-shaped stator structure with no slot and no core, the winding inductance is very small (generally about 0.009mH), so the PWM component of the stator current is very obvious(5065 skateboard motor).