regenrative braking features of MID-7652

Hello

I'm doing preliminary research on the following project concerned with the web roll-to-roll handling system.  The system should consist of a pay off the coast of the coil (dispenser), voltage sensor and a reliever of coil (winding). The two coils must be operated directly by DC servo motors controlled by Normal 0 MicrosoftInternetExplorer4 / * Style Definitions * / table. MsoNormalTable {mso-style-name: "Table Normal" "; mso-knew-rowband-size: 0; mso-knew-colband-size: 0; mso-style - noshow:yes; mso-style-parent:" ";" mso-padding-alt: 0 to 5.4pt 0 to 5.4pt; mso-para-margin: 0; mso-para-margin-bottom: .0001pt; mso-pagination: widow-orphan; do-size: 10.0pt; do-family: 'Times New Roman' ;} "} PCI-7342 and MID-7652. During the transport of the web forward, the web is pulled by motor winder and set by the engine of Unwinder (based on the feedback of the voltage probe). (And vice versa when the web is transported to the rear). As I understand it the engine of Unwinder acting as a brake generates actually the current, which flows into the drive (MID-7652). It is called braking system or a couple (current) negative or functioning of the four quadrants of the disc (in contrast to quadrant single operation - positive positive speed/torque only and two quadrant operation - speed/torque positive and negative speed/torque only). If the reader allows the regenerative braking (couple negative or current), it should contain the circuitry to report the current generated in the power supply bus (which is unusual for the readers of the power running alternative) or shunt it inside the car. I went through MID-7652 documentation that I could find, but received no clues on whether or not it can be used in a way.

Could you please comment using the motors controllers NO and readers in "braking mode" (i.e. when the controlled engine should provide a negative torque)?

I thank very you much in advance!

Michael

Hello Michael,

If you use the MID-7652 in quadrant 2 and 4, the absorbed energy charge a capacitor of the power of 48 V. In normal operation modes, this isn't a problem, like putting an engine off it generates only a small amount of power, which can be easily be manipulated by the capacitor. If you need run the engine for a long time in the quadrant 2 or 4, the player must disapate energy with one of the methods you described in your post, but is not possible with the MID-7652.

That being said, MID-7652 probably isn't a good choice for your application, and you must use an advantage player 3rd in combination with an UMI. Here you can find help on the choice of an appropriate product.

I hope this helps,

Jochen Klier

National Instruments

Tags: NI Hardware

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