What is the difference between the inverter and the transformer?
Literally speaking: the former is the conversion frequency, which is the conversion voltage.
Structurally speaking: The former is a complex electronic device, the latter is relatively simple equipment.
From the working principle speaking:
Inverter: first input AC rectifier filter, the control circuit according to the needs of the output modulation signal, the signal control power output tube turn on and off (usually half bridge or full bridge), by changing the turn on and off time, The corresponding output frequency.
Transformer: the usual sense of the transformer is composed of multiple coil winding and core components, in which one winding on the application of AC voltage, the other winding will produce the induced voltage, the voltage ratio for the winding turns ratio, The main frequency of the output frequency is the same as that of the input, and the harmonics are predominantly even.
The inverter is based on a set of thyristor inverter, learn SCR inverter AC speed control circuit, is this principle. But in its protection circuit, variable frequency drive and so are controlled by the microprocessor, the input command, the output control can display. It is the implementation of the inverter circuit, the internal procedures are CPU, RAM, ROM storage and instructions, but also through the button for some functions of editing.
In fact, is reliable output of the exchange of equipment he wants to ensure that the output voltage frequency are qualified
Transformer is to change the voltage of the device is like 220 kV substation to 110 kV, 10 kV and then to 220 volts that we usually use the electrical conversion equipment.
★ 1, [inverter]: inverter can change the frequency, [also change the voltage accordingly]. Because, inductive (such as motor) load, in the frequency down, the sense of resistance is also reduced, in order to prevent the current exceeds the rated value, must also reduce the voltage! In the last century just introduced, for the FM, voltage regulator, speed control device is known as the "three V technology" is the reason.
- ★ 2, [Transformer]: As the name suggests, the transformer is to change the voltage of the device. Transformers are typically used at specific frequencies (eg, frequency, or high frequency). As the voltage used to change, the frequency is constant, which is its salient features.
