INVERTED-TYPE ELECTRIC FIELD INSTRUMENT HAVING LOW POWER CONSUMPTION AND A CONSTANT SPEED

摘要

An inverted-type electric field instrument having low power consumption and a constant speed. The electric field instrument comprises a housing (1), a motor (3), a fixed disk (4), a fixed disk cover (6), a static sheet (8), and a moving sheet (9). The fixed disk (4) and the fixed disk cover (6) are provided inside the housing (1). The motor (3) is further provided inside the housing (1), and the motor (3) comprises a motor shaft. The motor shaft passes through the fixed disk (4) and the fixed disk cover (6), the static sheet (8) is connected to the motor shaft through an insulating plastic piece (7), and a cylindrical column (10) is sleeved at the bottom of the motor shaft. The moving sheet (9) is connected to the cylindrical column (10). The electric field instrument further comprises an electric field signal filtering circuit, an electric field signal polarity determining circuit, a motor control module, and a power supply unit. No positioning bracket, small blade, or photoelectric switch is comprised inside the housing of the electric field instrument, so that processing, fabrication, and assembly steps for the electric field instrument are simplified, the complexity of a signal processing circuit is lowered, and the overall volume of the electric field instrument is reduced.