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PID Control Tuning - Ocean City Brewing Company

OC Electric maintains all the electrical related equipment for OC Brewing Company in Ocean City, MD.  From a bad light bulb to complex PID control tuning for the brew process we provide complete electrical services to the popular restaurant and brewing company.  Contact OC Electric LLC for more information on a wide range of electrical services we can provide your home or business. 

PID Controllers

The PID controller algorithm involves three separate constant parameters, and is accordingly sometimes called three-term control: the proportional, the integral and derivative values.  Simply put, these values can be interpreted in terms of time:  depending on the present error, on the accumulation of past errors, and a prediction of future errors, based on the current rate of change.  The weighted sum of these three actions is used to adjust the process via a control element such as the position of a control valve, a damper, or the power supplied to a heating element.

Dramatic Process Control and Stability

In the absence of knowledge of the underlying process, a PID controller has historically been considered to be the most useful controller.  By tuning the three parameters in the PID controller algorithm, the controller can provide control action designed for specific process requirements.  The response of the controller can be described in terms of the responsiveness of the controller to an error, the degree to which the controller overshoots the set-point, and the degree of system oscillation.  The use of a PID algorithm for control dramatically improves control of the system and system stability.

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Soft Starter or VFD - Which to Choose?

Processing plants are filled with motors that drive pumps, fans, augers, compressors, conveyors, mills, mixers, and other equipment.  Many of these motors need or could benefit from a reduced-voltage soft start or a variable-frequency drive (VFD).  Both soft starters and VFDs substantially reduce the electrical and mechanical shock caused by across-the-line starting, and both help reduce electrical demand by reducing a motor's start-up current.

Soft starters and VFDs can reduce field building or inrush currents and machine starting torque by as much as 30% to 75% when compared to an across-the-line starter.

In applications such as pumps and compressors, which can require many starts per hour to maintain critical process flows or pressures, these reduced starting currents result in significantly less motor heating and longer motor life.  A softer or less rapid increase in motor torque at motor starting can also greatly extend the life of belt-driven and mechanically geared equipment.

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Grain Mill Upgrades to Soft Start Technology

Ocean City Electric was commissioned by a local Eastern Shore grain mill to upgrade a number of magnetic starters with soft start technology to prolong the life of the motors and related downstream equipment.  A solid-state soft start controller controls the starting torque and current of an AC motor electronically.  Contact OC Electric LLC for more information on the benefits of using soft start controller technology. 

Soft Starters can be used in almost any fixed speed application such as:

• Commercial—HVAC fans and pumps

• General industrial—fans, pumps, conveyors, material handling, and processing equipment

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