Hverjir eru frammistöðuvísar invertersins

Frammistaða inverterans þýðir venjulega að hægt er að mæla þessa vísbendingar með ýmsum mælitækjum á stuttum tíma. Such indicators are the quality indicators required by factories required by IEC standards and national standards. The user can know the quality of the frequency by selecting a few key indicators, instead of simply importing or domestically produced, whether it is expensive or cheap. The following are several key performance indicators of frequency frequency.

Hverjir eru frammistöðuvísar invertersins?
(1) How much starting torque can be output at 0.5Hz
An excellent high-frequency inverter can output a high starting torque of 200% at 0.5Hz (below 22kW and above 30kW, it can output a starting torque of 180%). An inverter with this performance can accelerate in a short time according to the load requirement, and can detect urgently changing loads in time.

(2) Frequency indicator.
The frequency index of the inverter includes frequency range, frequency stability accuracy and frequency resolution.
The frequency range is marked by the maximum frequency FMAX and the minimum frequency FMIN output by the inverter, and the frequency ranges of various inverters are different. Typically, the minimum operating frequency is approximately 0.1 til 1 Hz, and the maximum operating frequency is approximately 200 til 500 Hz.

Frequency stability accuracy is also called frequency accuracy. It refers to the actual error between the actual output frequency of the inverter and the given frequency when the given frequency is constant, after temperature and voltage fluctuations, or after long-term operation. Compared with the highest operating frequency (expressed as a percentage).

Til dæmis, the maximum operating frequency given by the user is FMAX = 120Hz, the frequency accuracy is 0.01%, and the maximum error is:

δFMAX = 0.0001×120hz = 0.012hz

In general, the frequency accuracy of time given time is about the frequency of free time. 10) °C].

Frequency resolution refers to the minimum variation of the output frequency, það er, the minimum difference between every two adjacent transmission frequencies.

Til dæmis, when the working frequency fx = 25Hz, if the frequency resolution of the inverter is 0.01Hz, the minimum frequency of the previous gear is:

fn'=(25+0.01) Hz = 25.01 Hz

The maximum frequency of the next gear is:

fx 2 = (25-0.01) Hz = 24.99 Hz

For digital setups, the frequency resolution depends on the performance of the microcomputer system. It is constant (such as 0.01Hz) in the whole frequency adjustment range (eins og 0.5 to 400Hz). For the simulation setting formula, the frequency resolution is also related to the resolution of the frequency given potentiometer, which can generally reach 0.05% of the maximum output frequency.