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Our Technology

Our Technology

In the following, we will briefly outline the most important basics on which our technology is based. We provide further details for experts below.

In order to control three-phase machines dynamically and efficiently using today’s standard methods, a position sensor is necessary for measuring the rotor position. The elimination of this position sensor would offer advantages for almost every application, such as cost reduction, space saving, reduction of failure probability or increase of robustness. It is advisable to avoid these expensive and vulnerable mechanical sensors particularly in cost-sensitive and safety-critical applications as well as under harsh environmental conditions.

Problems of sensorless control schemes

However, common sensorless control schemes lead to high development costs and risks due to their technological requirements, and show some disadvantages compared with control schemes using a position sensor. Examples include the necessary control bandwidth reduction, the audible noise emission at standstill, parameter dependencey, problems affecting the transition between low and high speed and the lack of suitability for machines with concentrated winding.

Depending on the application, some of the points mentioned are usually exclusion criteria for many industry applications. Therefore, injection methods are still almost not available on the market, and the use of position sensors for lower speed range is generally unavoidable.

Aim: Efficiency and performance without position sensor

Bitflux has now succeeded in overcoming the known problems of sensorless control. Through 20 man-years of research and development in the field of sensorless control, Bitflux has a wealth of know-how in the field of drive control. Hence, today Bitflux’ technology allows to realize applications with higher demand on efficiency and performance and, as a result, to reduce system costs and failure probability.

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Details on the Bitflux technology for experts

1. Complexity/Parameters

2. Noise

3. Dynamics

4. Generality

5. Load limtation

6. Computational effort

7. Accuracy