Back electromotive force suppression control method and system for permanent magnet driving system of mining electric wheel vehicle

The invention discloses a back electromotive force suppression control method and system for a permanent magnet driving system of a mining electric wheel dumper, and the method comprises the steps: detecting the operation data and state of the mining electric wheel dumper in real time in the operation process of the mining electric wheel dumper; judging whether the electric drive system has a fault according to the operation data and the state; when it is judged that the electric drive system breaks down and the back electromotive force suppression triggering condition is met, back electromotive force suppression is carried out, all switching tubes of an upper bridge arm of the inversion module are controlled to be switched off, all switching tubes of a lower bridge arm of the inversion module are controlled to be switched on, or all switching tubes of the upper bridge arm of the inversion module are controlled to be switched on; all switching tubes of a lower bridge arm of the inverter module are controlled