Siemens frequency converters, with their strong brand effect, have broken the monopoly position of Japanese brand frequency converters in the Chinese market. According to statistics from professional market research institutions, Siemens' high and low voltage frequency converters have already ranked first in the Chinese market.   The earliest use of Siemens frequency converters in the Chinese market was in the steel industry. However, at that time, motor speed regulation was mainly based on DC speed regulation, and the application of frequency converters was still an emerging market. However, with the continuous development of electronic components and the continuous maturity of control theory, frequency conversion speed regulation has gradually replaced DC speed regulation and become the mainstream of driving products, Siemens frequency converters have achieved large-scale development in this huge Chinese market due to their strong brand effect. Siemens' successful development in the Chinese frequency converter market can be said to be a perfect combination of Siemens brand and technology. The early Siemens inverters we can encounter in the Chinese market were mainly SIMOVERT A for current sources and SIMOVERT P for voltage sources. These inverters also entered the Chinese market together mainly due to the introduction of equipment, and there are still a small number of them in use. Later, the main products sold in the Chinese market were MICRO MASTER and MIDI MASTER, as well as the most successful series of Siemens inverters, SIMOVERT MASTERDRIVE, That is what we often refer to as the 6SE70 series. It not only provides AC frequency converters for general use, but also provides DC bus solutions with multiple motor drives required for special industries such as papermaking and chemical fiber. Of course, Siemens has also launched an ECO frequency converter that, in my personal opinion, has been technically unsuccessful but has been quite successful in the market. The technical failure is mainly due to its high failure rate, and the market success is mainly due to its surpassing Fuji frequency converter to become the first brand in the Chinese market. Currently, Siemens' main models in the Chinese market are the MM420 and MM440.6SE70 series.

The Siemens Inverter has multiple setting parameters, each with a certain selection range. During use, it is often encountered that the frequency converter cannot work properly due to improper setting of individual parameters. Control methods: speed control, torque control, PID control, or other methods. After adopting control methods, static or dynamic identification is generally required based on control accuracy. Minimum operating frequency: refers to the minimum speed at which the motor operates. When the motor operates at low speeds, its heat dissipation performance is poor. Prolonged operation at low speeds can cause the motor to burn out. Moreover, at low speeds, the current in the cable also increases, which can cause the cable to heat up. Maximum operating frequency: Generally, the maximum frequency of a frequency converter can reach 60Hz, some even up to 400Hz. High frequencies will cause the motor to run at high speed. For ordinary motors, their bearings cannot operate at the rated speed for a long time. Can the rotor of the motor withstand such centrifugal force.       Carrier frequency: The higher the carrier frequency is set, the larger the higher-order harmonic component, which is closely related to factors such as cable length, motor heating, cable heating, and frequency converter heating.       Motor parameters: The frequency converter sets the power, current, voltage, speed, and maximum frequency of the motor in the parameters, which can be directly obtained from the motor nameplate.       Frequency hopping: At a certain frequency point, resonance may occur, especially when the entire device is relatively high; When controlling the compressor, avoid the surge point of the compressor.