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FAQ
- What is the application of variable frequency speed control?
- In the second half of the 20th century, the power electronic devices from the SCR (thyristor), GTO (gate can be turned off thyristor), BJT (bipolar power transistor), MOSFET (metal oxide field effect transistor), SIT (electrostatic induction transistor ), SIT (Electrostatic Inductive Thyristor), MGT (MOS Control Transistor), MCT (MOS Control Gate) to today's IGBT (Insulated Gate Bipolar Transistor), HVIGBT (High Voltage Insulated Gate Bipolar Thyristor), Device To promote the continuous development of power conversion technology. Since the 1970s, pulse width modulation variable frequency (PWM-VVVF) speed control research has aroused people's attention. In the 1980s, the PWM model optimization problem, which was the core of the frequency conversion technology, attracted people's interest and made many optimization modes, in which the saddle-wave PWM mode was the best. The 20th century, the late half of the 1980s, the United States, Japan, Germany, Britain and other developed countries VVVF inverter has been put into the market and widely used.
- Is the motor having a variable frequency motor and a variable voltage motor?
- Have. 2, variable speed control; 3, electromagnetic speed; 4, variable speed control; 5, variable resistance speed control. Household fans are variable speed control. In addition, the DC motor can also use variable voltage to speed.
- 30 kW 6 pole frequency motor torque is how much
- To know what is the use of ah, the inverter motor is the same with the ordinary motor, but to prevent the operation of a low speed plus a fan
- Laptop adapter
- This principle is not, try, look at how the charge situation, if you can charge, can be filled, just a long time, to no harm However, the heat may be high, long-term so, there is a risk
- Inverter principle eff23
- For vectors such as vector-controlled frequency converters that require a lot of computation, there is sometimes a need for a torque calculation CPU and some corresponding circuits. Frequency control is by changing the motor stator winding power supply to achieve the purpose of speed.
- Laptop computer about electricity no electricity, is the power adapter problem?
- To judge this is very simple: 1. The computer is in the battery state to see if it works properly. If it does not work, the battery has a problem 2. Remove the battery from the computer with a power adapter to see if it is working properly. If not, there is a problem with the power adapter 3. If the two states can work that is the computer charge management part of the poor contact and other issues.
- 4 pole 380V 4-5.5KW frequency conversion motor and inverter about how much money, such as the use of electromagnetic speed motor comparison
- About 2,000 yuan, electromagnetic speed and vector inverter can bring feedback
- Does the inverter set the number of poles to match the number of poles of the motor?
- Variable-frequency (VFD) is the application of frequency conversion technology and microelectronics technology, by changing the motor operating frequency mode to control the AC motor power control equipment. The inverter is mainly composed of rectifier (AC variable DC), filter, inverter (DC variable AC), brake unit, drive unit, detection unit micro-processing unit and so on.
