Frequency conversion governor is a device that converts the power frequency power supply (50Hz or 60Hz) into a communication power supply of various frequencies to complete the variable speed operation of the motor, during which the control circuit completes the control of the main circuit, the rectifier circuit converts the communication power into direct current, the DC central circuit conducts smooth filtering on the output of the rectifier circuit, and the inverter circuit reverses the direct current into communication electricity.
The frequency and voltage should be changed in parts, that is, the output voltage of the inverter should be controlled while changing the frequency, so that the magnetic flux of the motor can be insisted on and the phenomenon of weak field and magnetic fullness can be avoided. This control method is mostly used in energy-saving inverters such as fans and pumps.
DC governor is a kind of motor speed regulation equipment, including motor DC governor, pulse width DC governor, thyristor DC governor, etc. Generally, it is a modular DC motor governor, which integrates power supply, control and drive circuits, selects three-dimensional structure layout, selects micropower consumption components for control circuits, uses photocouplers to complete the isolation transformation of current and voltage, and adjusts the share constant, integration constant and differential constant of the circuit with a PID adapter. The governor is small in size and light in weight, and can be used alone or directly installed on the DC motor to form an integrated DC speed regulating motor, which can have all the functions that the governor should have.
The principle of the AC governor is similar to that of the DC one, and the speed is adjusted by adjusting the input voltage.
This kind of communication motor speed regulation will not change the frequency of the motor input power supply.
Frequency conversion refers to changing the power supply frequency of the communication motor to achieve the intention of speed regulation.
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