.Servomechanisms.Electrical.SignMagnitudDrive

Information

General

The SignMagnitudDrive boolean block is used as a method to control de h-bridge with the inputs of PWM and ENABLE (or direction) comming from the controller. Is the model of the method sign-magnitud.

Implementation

This block uses low-side off-time current, the generation of the outputs are based on the expressions:

O1: PWM*ENABLE 

O2: PWM'+PWM*ENABLE' 

O3: PWM*ENABLE'

O4: PWM'+PWM*ENABLE

Notes

• The outputs should be connected to the h-bridge as: O1-Q1, O2-Q2, O3-Q3, O4-Q4.

Limitations

• The characteristics of Sign-Magnitud method could generate regenerative braking.

Example