About the principle of variable frequency power supply

About the principle of variable frequency power supply
 

Product description:

Input voltage: 0 (V) Waveform distortion: 0 (%) Frequency regulation: 0 (%)
Output voltage: 0 (V) Load regulation: 0 (%) Circuit mode: SPWM switching
Load Type: Rectifier load Custom processing: Efficiency: 0 (%)
Applications: appliance manufacturing Type: Three-phase inverter power supply Model: AF60
Output frequency: 0 (Hz) Brand: ACSOON Product Certification: CCC
Control mode: Pulse width modulation type Input Frequency: 0 (Hz)

About the principle of variable frequency power supply

Variable frequency power supply system principle

After AC → DC → AC conversion called frequency power inverter, which is different for variable speed controller motor speed to use, but also from ordinary AC power supply. The main function of the power inverter is now AC power supply is converted into the desired frequency stabilized pure sine wave power supply. over AC power is characterized by frequency stability, voltage stability, resistance is equal to zero, the voltage waveform is a pure sine wave (no distortion). Frequency Power very close AC power ideal, therefore, more and more advanced countries will be used as a standard power supply power inverter in order to provide the best use of electrical power supply environment, ease of use and objective assessment of the technical performance of appliances. There are two big power inverter Type: linear amplification type and AF series programmable PWM switching frequency power, microprocessor core, in order to make MPWM way, with active components IGBT module design, using digital divide, D / A conversion, instantaneous feedback, sine pulse width modulation technology, the unit capacity up to 100kVA, to isolate the transformer output to increase machine stability, strong load adaptability, good output waveform quality, easy operation, small size, light weight and other characteristics, with a short circuit, current, overload, overheating protection features to ensure reliable operation of the power supply.

Variable frequency power supply block diagram

Three-phase AC power IGBT PWM System Architecture

. ① Separate (stand-alone) three-phase AC power supply; no power transformer structure; input is not isolated; output isolation structure:

`Three independent output transformer, three converters, IGBT using up to 12 the number of` three groups converter rectifier also share a set of `three-phase single-phase integrated by a complete link is made, you can use single-phase . (Use any one phase) or three-phase use and suitable for three phase unbalance (100% unbalanced) loads, according to necessity make in a cabinet or three chassis structure is not the same; the cost is not the same; the performance of course not the same! !

. ② low-cost three-phase AC power supply; no power transformer structure; input is not isolated; output isolation structure:

Features: `an output transformer winding three groups; one group converter; IGBT number using only six` only for the use of three-phase loads (each phase alone can not access), not suitable for unbalanced load `This structure only can produce in a chassis

③ independent three-phase AC power supply; no output transformer structure; an input isolation; output is not isolated structure diagram:

Features:

`A power transformer; three inverters; IGBT number 12` use-phase single-phase integrated by a complete link from; can be single-phase use (any phase) or three-phase use, `suitable for three phase and unbalanced (100% unbalanced) loads, only produced in a chassis