Yaskawa inverter is a power regulation device that can convert AC power into DC power, and then convert DC power into AC power output through the inverter. It realizes the control of motor speed, torque and other parameters by adjusting the frequency and voltage of the power supply. Yaskawa inverter vector control is an advanced motor control technology, the following is a detailed analysis of Yaskawa inverter vector control:
1. Basic principles
The basic principle of vector control is to measure and control the stator current vector of asynchronous motor, and control the excitation current and torque current of asynchronous motor respectively according to the principle of magnetic field orientation, so as to achieve the purpose of controlling the torque of asynchronous motor. Specifically, the stator current vector of the asynchronous motor is decomposed into the current component that generates a magnetic field (excitation current) and the current component that generates torque (torque current) to be controlled respectively, and the amplitude and phase between the two components are controlled at the same time, that is, the stator current vector is controlled.
2. Main features
High performance: Vector control technology can carry out advanced control of the motor to achieve high-precision and high-performance torque control.
High efficiency: vector control technology can achieve high efficiency control, effectively improve the efficiency of the motor and save energy.
High reliability: Vector control technology has a strict protection mechanism to ensure the safety and reliability of the equipment.
Strong torque output: Vector control technology can achieve strong torque output, improve the motor starting capacity and load capacity.
Low speed and high torque: vector control technology can achieve low speed and high torque special operation, more suitable for some special industries.
3. Control mode
Yaskawa inverter vector control has two control modes: vector control and direct torque control.
Vector control mode: The inverter enables precise speed and torque control.
Direct torque control mode: Frequency converters enable more precise torque control.
4. Application field
In the field of industrial automation, Yaskawa inverter vector control technology has been widely used. Especially in the frequency conversion control of some large machines and equipment, Yaskawa inverter vector control technology can achieve more fine control, improve the operating efficiency and load capacity of the equipment. In addition, in some areas of motor control and drive control, Yaskawa inverter vector control technology can also achieve more efficient and stable control, improving the efficiency and stability of the entire system.
5. Jitter causes and solutions
Although Yaskawa inverter vector control technology has many advantages, but in the practical application, sometimes there will be jitter phenomenon. This is mainly due to the following reasons:
Power supply problem: If the power supply voltage is unstable or there is interference signal in the power supply, it will cause jitter phenomenon in the vector control of the Yaskawa inverter with the motor. At this time, you should ensure that the power supply voltage is stable, the power supply line is good, and you can consider installing a voltage regulator or filter to reduce the interference signal in the power supply.
Motor problems: motor rotor imbalance, bearing wear, loose transmission system and other problems will lead to Yaskawa inverter motor vector control jitter. Therefore, the motor rotor balance, bearings and transmission system should be regularly checked, and the worn parts should be replaced in time to ensure the smooth operation of the motor.
Controller problems: If the Yaskawa inverter controller fails or the parameters are set incorrectly, it will also cause the motor vector control jitter. At this time, Yaskawa inverter should be regularly maintained, check whether the controller parameter Settings are correct, and update the software version in time.