Brush control system and method on a washing brush installation for cleaning vehicles

1. A brush control system in a washing brush installation for vehicles comprising a first means of control of the rotation speed and torque of a first actuation motor for the rotation of at least one brush of said installation, directly or indirectly connected with a second means of control of the position of said at least one brush in relation to a vehicle to be washed, wherein said first control means determines the variation between a true current value and at least one reference value of an electrical quantity of said first motor, and commands the reduction of the rotation speed and torque of said first motor when said true value is greater than or equal to said reference value, and wherein said system sets a single maximum reference value of said electrical quantity.

2. The brush control system of claim 1 wherein said first control means comprises a first inverter and said maximum reference value is set in said first inverter.

3. A brush control system in a washing brush installation for vehicles comprising a first means of control of the rotation speed and torque of a first actuation motor for the rotation of at least one brush of said installation, directly or indirectly connected with a second means of control of the position of said at least one brush in relation to a vehicle to be washed, wherein said first control means determines the variation between a true current value and at least one reference value of an electrical quantity of said first motor, and commands the reduction of the rotation speed and torque of said first motor when said true value is greater than or equal to said reference value, and wherein said system sets a maximum reference value and a plurality of intermediate reference values of said electrical quantity.

4. The brush control system of claim 3 wherein said intermediate reference values are set in a programmable logic controller.

5. A brush control system in a washing brush installation for vehicles comprising a first means of control of the rotation speed and torque of a first actuation motor for the rotation of at least one brush of said installation, directly or indirectly connected with a second means of control of the position of said at least one brush in relation to a vehicle to be washed, wherein said first control means determines the variation between a true current value and at least one reference value of an electrical quantity of said first motor, and commands the reduction of the rotation speed and torque of said first motor when said true value is greater than or equal to said reference value, and wherein the determination of said reference value of said electrical quantity refers to the true value detected during a dry run at each start-up of said at least one brush.

6. A brush control system in a washing brush installation for vehicles comprising a first means of control of the rotation speed and torque of a first actuation motor for the rotation of at least one brush of said installation, directly or indirectly connected with a second means of control of the position of said at least one brush in relation to a vehicle to be washed, wherein one or more of said first control means and said second control means includes a vectorial inverter.

7. The brush control system of claim 6 wherein said first control means includes a first vectorial inverter and at least said first vectorial inverter is a closed loop vectorial inverter.

8. The brush control system of claim 6 wherein said first control means includes a first vectorial inverter and at least said first vectorial inverter is an open loop vectorial inverter and operates in simulated vectorial mode.