Roots blower inverter motor control principle is generally blower inverter motor control strategy is: the base speed with constant torque control, constant power above the base speed control, ultra-fast weak magnetic scale manipulation. Base rate: because the motor work occur when a counter electromotive force, and the size is generally proportional to the speed of the back EMF. Thus when the motor work to a certain speed, because the back-emf size and size as the applied voltage, the speed at the moment called the base speed. Constant Torque Control: motor at the base speed blower, constant-torque control. At the moment the motor speed is proportional to the counter electromotive force E and the motor. And motor output power and the motor torque and speed proportional to the product, which at the moment is proportional to the motor power and speed. Constant Power Control: When the motor beyond the base speed, after conditioning motor excitation current to control the motor back-EMF simply adhere to stabilize, as progressive motor speed. At the moment, the motor output power simply insist on stable major-power blower, but the motor torque and speed inversely proportional to the decrease. Weakening control: When the motor speed must exceed the value, the field current is now reasonably small, simply can not recuperate, now entering the field weakening control period. Roots blower Features: 1, the spiral shape of the fixing screw 20 ° above manner, into the exhaust shield housing spiral cut, by rotation of the rotor sequentially open low-power blower, so a slight ripple into the exhaust, running sound small. 2, the rotor take special shape, easy to keep the mutual gap between the rotor, so efficiency is further improved. 3, because the rotor is the clover linear, small axial displacement of the rotor in contact. To ensure rotor gap in profile. Hangzhou Roots blower, Zhucheng East Han Machinery Co., Ltd., a small energy-saving blower provided by Han Machinery Co., Ltd. Zhucheng East. Hangzhou Roots blower, Zhucheng East Han Machinery Co., Ltd., a small energy-saving blower is Zhucheng East Han Machinery Co., Ltd. (www.dhlcfj.com) (www.dhlcfj.com) this year introduced a new upgrade, the above picture is for reference, please call Tel picture on this page or to obtain the latest information, contact: Mr. Wang.