1301720556

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1301720556 is a versatile frequency converter for controlling the speed of three-phase asynchronous motors. It can be widely used in the field of fan, pump, compressor, belt conveyor, machine tool, crane and lifting platform, printing and dyeing machine, winder and other industrial equipment. Its working principle is to achieve the stepless speed change of three-phase asynchronous motors through the pulse width modulation (PWM) and voltage control mode.

The 1301720556 is based on the PWM programmable energy-saving speed regulation technology. The basic block diagram of the speed control system controlled by the 1301720556 frequency converter is shown in Figure 1. This speed control system has generally four input signals: two analog signals and two digital signals. The analog signals can be two voltage or current signals.

The two voltage or current signals are typically the DC excitation signal for the motor and the speed command signal. The two digital signals are the start signal and the stop signal. The DC excitation signal is obtained from a single-phase rectifier, which rectifies the alternating voltage from the main power source. At the same time, the DC excitation signal is superimposed on a carrier signal in a frequency modulation circuit. The DC excitation signal is modulated with the carrier signal and the resulting signal is amplifi

The two digital signals from the start/stop keyboard or switch are used to enable or disable the speed control circuit. The speed command signal is a DC voltage signal that indicates the speed that the motor should achieve. It is usually generated by setting a potentiometer or by a separate analog input card. The speed command signal is then amplified by the amplifier and is compared with the speed feedback signal from the tachometer in the speed regulator circuit, and the difference is amplified until a balanced state is achieved.

In the case of a 1301720556 frequency converter, the rectified excitation signal is changed by means of a pulse width modulation circuit. The frequency converter is instructed which peak-peak voltage to supply, and also it is possible to adjust the ratio between the maximum and minimum voltage. This means that the 1301720556 can be used to control the DC motor\'s speed by continuously changing the peak-peak voltage in the range of 0 to the maximum peak-peak voltage. The output of the converter is then applied to the DC motor and the speed is thus regulated.

The 1301720556 is also designed to provide comprehensive protection for pumps, fans, and other equipment. It offers such protections as over-voltage protection, overload protection, phase protection, and temperature protection. It also has various indicators to show the operating condition of fans, pumps, and other equipment. The speed of the motor is displayed in real-time so that the operator can monitor and adjust the speed of the motor.

Overall, the 1301720556 frequency converter is a reliable, cost-effective, and energy-efficient device for controlling the speed of three-phase asynchronous motors. It can be widely used in the field of fan, pump, compressor, belt conveyor, machine tool, crane and lifting platform, printing and dyeing machine, winder and other industrial equipment. The frequency converter is also simple and easy to install and use, making it an ideal choice for speed control systems.

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