ABB frequency converter professional maintenance of telephone ABB drive Chaoyang Price

Professional maintenance ABB inverter | Chaoyang Drive Installation telephone | ABB inverter is PWM wave inverter output prices, contain more high harmonics. Frequency power sensor through the voltage and current signals inputted AC sampling, then the value of the input sampling frequency power analyzer via a transmission system with digital cable, optical fiber, digital input frequency power analyzer sample values ??of voltage and current conduct arithmetic, you can get the voltage rms, current rms, fundamental voltage and fundamental current harmonic voltage and harmonic current, active power, fundamental power, harmonic power and other parameters. Works Overview main circuit is to provide a power conversion part asynchronous motor VVVF power, the main circuit of the inverter can be divided into two categories: voltage-source DC voltage is converted to AC inverter, DC link Filtering is the capacitance. Current type is the DC into AC current source inverter, the DC circuit filter inductor. It consists of three parts, the frequency power into DC power, "rectifier" absorbed in the converter and the inverter generates a voltage ripple of "smoothing circuit", as well as the DC power into AC power "reverse change is. " Smoothing circuit in the DC voltage rectified in the rectifier, contains 6 times the frequency of the pulsating power source voltage, moreover pulsating current generated by the inverter DC voltage also changes. In order to suppress voltage fluctuations, the use of inductors and capacitors absorption pulsating voltage (current). Installed capacity hours, if the power supply and the main circuit device has a margin, omitted inductance simple smoothing circuit. In contrast with the rectifier inverter, the inverter is converting DC power to the AC power frequency required to determine the time for the switching device 6 is turned off can be obtained three-phase AC output. In the voltage-pwm inverter as an example shows the switching time and voltage waveforms. Induction motor control circuit is to supply (voltage, frequency adjustable) primary circuit provides a control signal circuit, it has a frequency and voltage "operation circuit", the main circuit "voltage, current detection circuit" motor "speed detection circuit ", the control signal arithmetic circuit amplifying" driving circuit ", and an inverter and the motor" protection circuit "component. ? Professional maintenance ABB inverter | Chaoyang Drive Installation telephone | ABB inverter prices?