BRUSH CURRENT CONTROL SYSTEM, AND BRUSH CURRENT INTELLIGENT CONTROL SYSTEM AND CONTROL METHOD

摘要

A brush current control system, and a brush current intelligent control system and control method. A force sensor (3) is arranged at a lifting end of a brush (1), a mover (5) of a controllable power device is connected to the force sensor (3), a thrust is transferred to the brush (1) via the force sensor (3), the force sensor (3) is then connected to the controllable power device through a controller, a brush current loop is connected to a shunt (8) or a Hall current sensor (9) for measuring the current passing through the brush (1), and the shunt (8) or the Hall current sensor (9) is connected to the controller. When in use, if the current on the brush (1) measured by the shunt (8) exceeds an upper limit value, the controller issues an instruction to increase the thrust output by an electric motor (4) until the current on the brush (1) is less than the upper limit value. Otherwise, if the current on the brush (1) measured by the shunt (8) is less than a lower limit value, the controller issues an instruction to decrease the thrust output by the electric motor (4) until the current on the brush (1) is greater than the lower limit value.