Permanent magnet synchronous inverter

  • Permanent magnet synchronous inverter
  • Permanent magnet synchronous inverter
  • Permanent magnet synchronous inverter
  • Permanent magnet synchronous inverter
  • Permanent magnet synchronous inverter
  • Permanent magnet synchronous inverter
  • Permanent magnet synchronous inverter
  • Permanent magnet synchronous inverter
  • Permanent magnet synchronous inverter
Permanent magnet synchronous inverter
  • VOGA
  • China
  • According to customers requirement
  • 10--50 pcs/day

The high-voltage permanent magnet synchronous motor inverter, with high-speed DSP as the control core, adopts space voltage vector control technology, power unit series multi-level technology, and is designed with high reliability, easy operation, and high performance to meet various load adjustments of users. It is a high-high voltage source inverter for the needs of rapid energy saving and improved production technology. Accurate and efficient control of high-voltage permanent magnet synchronous motors.

1. Powerful self-learning of motor parameters Powerful self-learning of motor parameters The high-voltage permanent magnet synchronous motor inverter can accurately identify the stator resistance Rs, direct axis inductance Ld, quadrature axis inductance Lq, motor rated back EMF and other parameters of the permanent magnet synchronous motor. After the identification is completed, the data is recorded in the EEPROM, and there is no need to identify again in the future. The precise vector control of the motor can be carried out through the motor parameters.


 2. Sensory vector control The high-voltage permanent magnet synchronous motor inverter adopts an improved space vector field-oriented control strategy. The control system adopts a double closed-loop structure of speed loop and current loop. The high-voltage permanent magnet synchronous motor inverter system adopts a double closed-loop full-digital speed control system of speed and current. The speed of inductive vector control is obtained by the speed sensor. After PI adjustment with the speed setting ω, the output torque current setting iqref, idref excitation current setting is adjusted according to the dynamic needs of the system. Its value is obtained according to different motors and loads. The three-phase current feedback iu, iv, iw of the motor is sampled by the sensor, and then through Clarke and Park transformation, the id, iq, id, iq values and the given values iqref and idref are adjusted to output Vq and Vd after PI adjustment. After inverse transformation, the three-phase voltage Uu, Uv, Uw of the motor stator is output to drive the motor to rotate. 

permanent-magnet-synchronous-inverter


3. Non-inductive vector control The key of non-inductive vector control is to estimate the rotor position and speed through the voltage and current on the stator side of the motor. The model reference adaptation (MRAS) algorithm used by the estimator. A model reference adaptive system contains two models, namely a reference model and an adjustable model. These two models have the same physical output. The difference is that the reference model does not contain parameters to be estimated, while the adjustable model contains corresponding The parameters to be estimated. The basic idea is: the output and state performance indicators of the reference model and the adjustable model obtain the error equation through the feedback comparator, and construct a suitable adaptive law, so that the control object of the adjustable model can follow the dynamic response of the reference model, thereby realizing self Adapt to real-time adjustment. 

frequency changer


4. Waveform display and comprehensive record The main control system monitors the input current, voltage, output voltage, and current in real time, and realizes the display of its waveform. It can also analyze the harmonics of each phase voltage and current, which helps the user to master various power parameters of the equipment. 

inverter


5. Black box function, intelligent analysis The equipment has the function of automatically recording the operating status and display, and can view the output current, output voltage, set frequency, operating frequency, input current and input voltage values of a total of 200 points (100ms) before and after the protection, which is convenient for daily maintenance and rapid abnormal diagnosis .  

permanent-magnet-synchronous-inverter


6. Undisturbed switching, avoid impact Frequency conversion cut power frequency: The frequency converter brings the motor to the power frequency frequency, detects the frequency, phase and amplitude of the power frequency grid, and then adjusts the frequency converter output to be the same frequency and phase as the power frequency. After the adjustment is completed, disconnect the inverter after connecting the motor to the grid. Power frequency cut frequency conversion: First, the frequency converter detects the frequency, phase and amplitude of the power frequency grid, and directly outputs the corresponding voltage vector to the motor after the frequency converter cuts in, and finally exits the power frequency. This technology can meet the needs of multi-motor integrated control and large-capacity motor soft start. The maximum inrush current is less than the rated current, and it can truly achieve fast soft switching and no large current impact.    frequency changer


   








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