Stepping motor based wind speed control system for small wind tunnel

• Main Authors: WANG JIANQIANG, WANG KUNPENG, SONG JUNRUI
• Format: Patent
• Language: Chinese; English
• Published: 12.03.2014
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

The utility model discloses a stepping motor based wind speed control system for a small wind tunnel, relates to the field of wind speed control for small wind tunnels, and solves the problems of structural complexity, high cost and unstable wind field intensity by adopting an alternating-current motor to control the small wind tunnels in the prior art. The stepping motor based wind speed control system comprises a main controller, a stepper motor driver connected with the main controller, a stepping motor connected with the stepper motor driver and a three-leaf fan connected with the stepping motor. The main controller generates PWM (pulse-width modulation) modulation waves with corresponding frequency according to a command of the wind field intensity output as required and transmits the PWM modulation waves to the stepper motor driver, the stepper motor driver generates electrical pulse signals with corresponding frequency according to the PWM modulation waves with the corresponding frequency and transmits