47results about How to "Avoid heat and burn" patented technology

The invention provides a control method and device for preventing caterpillar bands from skidding and a milling machine. The control method for preventing the caterpillar bands from skidding includes the steps that the current revolving speeds of hydraulic motors corresponding to multiple caterpillar bands are obtained; whether skidding occurs or not is judged according to the current revolving speeds; under the situation that skidding occurs, the discharging capacity of the corresponding hydraulic motor of the caterpillar band which skids is reduced, and therefore system pressure is boosted and the caterpillar bands which do not skid can obtain driving force again. According to the control method and device for preventing the caterpillar bands from skidding and the milling machine, whether skidding occurs or not can be automatically judged according to the current revolving speeds of multiple hydraulic motors in real time, when skidding occurs, the discharging capacity of the hydraulic motor on the caterpillar band which skids is automatically reduced, and therefore the system pressure is boosted suddenly and the hydraulic motors of the caterpillar bands which do not skid can obtain the enough driving force again. Thus, the whole milling machine can recover to a continuous walking state and the problem that the hydraulic motor of the caterpillar band which skids is in a high-speed rotation state for a long time and is consequently heated and burnt is solved.

The present invention discloses a control method of an electromagnetic heating system. The control method comprises the following steps of: controlling an electromagnetic heating system to enter a first heating period and a second heating period, wherein each heating period comprises a discharge phase, a heating phase and a stop phase, in the discharge phase of the first heating period, a drive circuit is controlled to output M first pulse signals to a power switch tube, and in the discharge phase of the second heating period, the drive circuit is controlled to output N second pulse signals tothe power switch tube; and recording the number of pulses which cannot meet a preset condition in the M first pulse signals by employing a first counter to obtain a first counting value, and recording the number of pulses which cannot meet the preset condition in the N second pulse signals by employing a second counter; and determining whether the drive circuit is abnormal or not according to a first counting value and a second counting value so as to effectively detect the abnormal condition of the drive circuit and reduce the loss. The present invention further discloses an electromagneticheating system and an electromagnetic heating device.