DEVICE FOR START AND REVERSE OF NON-CONTACT AC ELECTRIC MOTORS Russian patent published in 2018 - IPC H02P6/20 H02P6/16 H02K29/08 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the electrical engineering and can be used in electrical machines with contactless switching of sections of the armature winding. Technical result is an extension of the area of application of non-contact electric engines, including operation under extremely harsh environmental conditions. Starting and reversing device has a direct current source supplying the functional blocks, pulse shaping unit, in-phase to each half-cycle of the supply voltage, and each phase has a power and low-current switch of alternating current, transformer blocks for separating phased back electromotive forces, low-frequency controlled multivibrators providing initial start-up of the electric engine rotor and generation of pulses, in phase to each half-period of the phased back electromotive forces, which are logically summed with the corresponding pulses, in phase to half-periods of the supply voltage. Resulting pulses act on the primary windings of the pulse transformers, the pulses from the output windings of which, depending on the position of the switch, "Forward" or "Back", change the power of the function blocks, respectively. Therefore, the AC switches in the absence of power supply of the functional blocks of phase A go into a closed state, and the phase B switches will switch, with phase B becoming the main, and phase A becoming the auxiliary.

EFFECT: as a result, acceleration and synchronous operation of the motor in the opposite direction of rotation of the rotor occur.

1 cl, 1 dwg