HP 2995 manual DEC/B Deceleration with 60 Hz or 120 Hz configuration

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DEC/B: Deceleration (with 60 Hz or 120 Hz configuration)

The DEC/B trim pot sets the time it will take the

 

 

 

SECONDS

motor to reach zero speed from an initial full speed

 

(60Hz ONLY)

setting. The trim pot is factory set to approximately

 

10.0

 

 

1.5 seconds. Adjust the trim pot as required for the

3.0

17.0

application.

Application Note: On applications with high inertial

1.5

 

 

 

 

18.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

loads, the deceleration may automatically increase

0.3

 

 

 

 

 

 

20.0

 

 

 

 

 

 

 

 

in time. This will slow down the rate of speed

 

 

 

 

DEC

decrease to prevent the DC bus voltage from rising

 

 

 

 

 

 

 

 

 

 

 

 

 

 

to the overvoltage trip point. This function is called regeneration protection. It is recommended that for very high inertial loads that both the ACC and DEC/B trim pots be set to a minimum of 10 seconds.

DEC/B: Boost (with 50 Hz configuration)

When the control is set for 50 Hz motors, the DEC/B

 

 

 

 

 

50 Hz

trim pot becomes Adjustable Boost. Most 60 Hz

 

% BOOST

motors conforming to NEMA standards can operate

 

18

 

from a preset volts/Hz curve. 50 Hz motors generally

 

 

 

 

 

differ widely in their characteristics. Therefore, it is

10

 

 

26

necessary to have Adjustable Boost to obtain

 

maximum motor performance. Since the boost trim

 

 

 

 

 

 

 

 

 

 

pot was the deceleration trim pot in the 60 Hz mode, it

6

30

will take on the prior setting of the DEC/B trim pot.

 

 

 

 

 

 

 

 

 

 

 

 

 

DEC/B

In order for the 50 Hz motor to run properly, the boost

must be adjusted. If the application does not require full torque below 10 Hz, the boost trim pot can be conservatively set at 8% (9 o’clock position). If more precise speed regulation is required due to varying load, the boost can be set as follows.

1.Place an AC analog RMS ammeter in series with one motor lead (Generally, digital or clamp-on meters do not yield accurate readings).

2.Run the motor unloaded* at approximately 4 Hz (or 120 RPM). (*Note: An unloaded motor with excessive boost will draw more current than a partially loaded motor.)

3.Turn up boost until the ammeter reaches the nameplate rating.

4.Using the main speed potentiometer, slowly adjust motor speed over a 0 – 15 Hz (0 – 450 RPM) range. If motor current exceeds nameplate rating, lower boost setting.

CAUTION

To avoid motor winding overheating and failure, do not over boost motor.

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Contents Phase AC Motor Speed Control Quick Reference Table of Contents Electrical Ratings Product SpecificationsImportant Safety Precautions Examine before installation InstallationMount Control Choose a Suitable LocationConnection Preliminary SetupPage Electrical connections for Model Connect the MotorConnect to AC Power Connect AC Line CordClose and Seal the Enclosure Check System Before Starting OperationOperate the Inverter Adjust Trim Pots OptionalMIN Minimum Speed DEC/B Deceleration with 60 Hz or 120 Hz configuration CL Current Limit with I2t Shutdown Abnormality Check Point Countermeasure TroubleshootingOperating LED LED Flash Corrective Type HPP-5337E4 AC Motor Speed Control, Model number Declaration of ConformityBodine Limited Warranty