Vansco VMM3120, Руководство пользователя

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60 VMM3120
Application Examples
9.6. Controlling a Linear Actuator
The VMM3120 can control the position of a linear actuator by using two h-
bridges of high-side and low-side outputs, and monitor the position of the actuator
using an analog input. When making the connections, it is highly recommended to
use the high-side and low-side outputs in pairs to avoid potential problems (use
high-side output 1 with low-side output 1, etc.).
Note: The VMM3120 has Proportional-Integral-Differential (PID) capabilities
that make it possible to control devices like proportional valves through
software. Refer to the appropriate software manual, or contact your Parker
Vansco Account Representative for more details about software. This section
only provides hardware connection information.
The software should be written to adjust the PWM duty cycle and direction of the
current to achieve a target position for the linear actuator.
The following shows how to connect high-side and low-side outputs for
controlling a linear actuator:
Figure 29: Connection for controlling a proportional valve