A new type of energy-saving electric drive: The most efficient way to save energy

There are known DC and AC electric drives with excitation control, containing negative feedback circuits for speed and the derivative of the flow. In such drives, the efficiency always decreases proportionally to the number of links included in them, as the number of elements included in them increases. That is, if the power supplied to the drive motor is Pel = I  U, then the power on the drive motor shaft will be equal to: PDM = Pel  KDM , where KDM -  is the efficiency of the drive motor. The power will be removed from the generator: PDM = Pel KDM KG , where KG is the efficiency of the generator. Further, the consumed power will also decrease as the number of links included in the chain with other consumers increases. The device described below relates to the field of electrical engineering, namely to electric drives with speed feedback. The drive uses a parallel oscillatory circuit in which the current resonance is achieved. This parallel oscillatory circuit has a built-in brushless anchor of a synchronous AC motor DCm, which is powered by a brushless anchor of an AC generator G made according to the synchronous generator scheme. The anchor of the generator G and the DCm motor are on the same shaft, forming a single system, which is driven by the drive motor DM. At current resonance in the parallel oscillatory circuit, the active current in the branched section of the circuit, where the anchor of the DCm motor is located, can be many times greater than the active current in the unbranched section of the circuit, where the anchor of the generator G is located. Thus, the technical result of using this drive is saving electricity supplying the drive motor DM of the device.