Integrated Protections and Controlled Deceleration

When an electric motor is interrupted its deceleration is stipulated exclusively by the machine’s heavy duty torque (natural deceleration). Modern converters usually guarantee the thermal protection of the motors and their own as well.

From the current measurement, a microprocessor calculates the temperature increase of the motor and expresses an alarm or shutdown signal in a situation of excessive heating.

Starting systems and electronic converters control the deceleration by means of a linear or S ramp, usually independent of the acceleration ramp. The ramp can be configured in such a way as to have an incessant stepping speed at an intermediate or zero speed. This speed is less than the natural deceleration time the motor has to increase a resistant torque that comes to add to the resistant torque of the machine.

Above the natural deceleration time the motor must generate a lower motor torque than the machine’s sturdy torque. Changing the direction of rotation can be managed with the engine stopped after deceleration without electric braking or with electric braking to achieve deceleration and rapid change.

 

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Integrated Protections and Controlled Deceleration