Archive for December, 2018


This law regulating the voltage as a function of frequency is called the U / f = const. If we substitute in formula (2) the voltage for low speed, the percentage of iR – component inversely proportional to the increases relative to applied voltage. This leads to a significant decrease in the flow at low frequencies and, correspondingly, a decrease of the moment. To ensure the load capacity of the time close to par in the entire range of speeds used iR-compensation, that is overstating the voltage on the law U / f = const as shown in Figure 3. Fig. 3.

The law regulating U / f = const in the drive frequency converter is capable of convert voltage and frequency converter coming from the usual (380V – 50Hz) to the regulated frequency voltage (U) and frequency (f). The principle of frequency inverter frequency inverter specifies three conditions under different speeds at different engine: Changes the speed of the magnetic field in the engine Keeps the magnetic field in the engine continuously provides smooth rotation of the 3-phase field (not stepwise) to explain all these Conditions 1. Changing the speed of the magnetic field. To satisfy this condition, you must change the frequency of the output voltage inverter. 2. Constant magnetic field in the engine.

Electrical energy is supplied mains power supply 380V – 50Hz. The engine is designed for a well-defined voltage and frequency of the mains.


Friday, December 7th, 2018 News Comments Off on Magnetic

Magnetic Sensors

Magnetic fields can today with various techniques already in minimum field strengths locate and use for the determination of position and movement. The non-contact magnetic sensors is robust and wear-free. So are these measurement procedures for use in harsh environments. In addition, new technologies such as GMR or fluxgates make particularly cost-effective applications. Applications in the automotive, mechanical engineering, automation and logistics with the use of RFID chips are equally diverse.

The two-day symposium of magnetic detection of position and movement”under the direction of Prof. Meinhard Schilling gives the principles of operation of magnetic field sensors, the metrological realization for different applications and practical examples from the application. “Is for the fifth time on 23 and 24 June 2009 the magnetic detection of position and movement Symposium” held in the Haus der Technik in Munich. As participants are engineers, design engineers, physicists and technicians from the Research, development and production are addressed. Applications are under the Tel. 0201/1803-344, 0201/1803-346 fax or on the Internet at. For more information, see../W-H010-06-268-9.html

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Sunday, December 2nd, 2018 News Comments Off on Magnetic Sensors