AC890 Product Overview - Grp6.com

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How Slip Compensation improvesspeed regulationExample: Motor under load at 30 HzBEFORE%T17515010030 Hz curveFull load 30 Hzoperating point (100%current & torque)850 RPMSync. or “no-load”30 Hz speed900 RPM%T175150100AFTERNew 31.7 Hzcurve900 RPM950 RPMSpeedSlip (50 rpm)SpeedSlip (50 rpm)A motor will lose 50 rpm underfull load with 30 Hz appliedfrequency, slipping from 900 to850 RPM.By sensing current and othervariables, SLIP COMP will apply31.7 Hz to the motor, restoringthe speed to 900 RPM.16
17Autotuning on Sensorless Vector DrivesFACT: Most motor electrical parameters aredifficult to obtain from the manufacturer.ROTOR RESISTANCEROTOR REACTANCEMAGNETIZING CURRENTSTATOR RESISTANCELEAKAGE REACTANCE?????Not typically found on motor nameplateA Sensorless Vector AUTOTUNE function makes the job easy:1. Enter nameplate motor parameters (base speed, full load amps, voltage,frequency, power factor).2. Run the ‘AUTOTUNE ‘ function. The controller will pulse the motor &determine approximate motor electrical characteristics for SENSORLESSVECTOR Operation.3. The S-V algorithm can now compute torque- and magnetizing currentvectors for more precise motor control.
Page 1: AC890 Product OverviewCALL 800-433-
Page 4 and 5: ProgrammingPort USBAll Control Conn
Page 6 and 7: I/O Terminal Interface Module - NEW
Page 11 and 12: Basic SSD Drives AC Power CircuitBR
Page 13 and 14: Power Factor on AC and DC Drives.96
Page 15: Basic V/HZ Control Circuit:Input, F
Page 19 and 20: AC VECTOR CONTROL LOOPSAC Vector Dr
Page 21 and 22: Motor Current VectorsMagnetizingCur
Page 23 and 24: Conditions for Regenerating onan AC
Page 25 and 26: Dynamic Braking on AC DrivesACInput
Page 27 and 28: Line Regenerative AC DrivesBI-DIREC
Page 29 and 30: Common Bus Drive Power Connections:
Page 31 and 32: Input Power ConfigurationsParallel
Page 33 and 34: Typical System:135HP Common Bus350
Page 35 and 36: Common Bus Adapter Module Connectio
Page 37 and 38: AFE Power Connections:Common Drive(
Page 39 and 40: Line Regenerative SolutionsLarger A
Page 41 and 42: Easy set-up using DSEconfiguration
Page 43: Performance LevelsAC890 can deliver
Page 46 and 47: Duct Assembly Option - ExampleSizin
Page 48 and 49: 6901 Keypad OptionThe 6901 keypad (
Page 50 and 51: Speed Feedback OptionsFeedback Type
Page 52 and 53: Incremental (Pulse) EncoderPerforma
Page 54 and 55: Sin / Cos Encoder Option• Samplin
Page 56 and 57: Option CardsSin/Cos Encoders• Inc
Page 58 and 59: Option CardsSin/Cos Encoders• Abs
Page 60 and 61: Communication OptionsComms Type Use
Page 62 and 63: Electronic Line Shaft ControlSoluti
Page 64 and 65: PLC FriendlyTypical 3-drive AC890 s
Page 66 and 67:
AC890PXHigh PowerModular ACDrives
Page 68 and 69:
• Each bay location holds 1 Power
Page 70 and 71:
POWER ENTRY TYPESTOP POWEREntry / E
Page 72 and 73:
Dynamic Braking - Standard!Dynamic
Page 74 and 75:
Three uses of Active Front End arch
Page 76 and 77:
1500 HP Parallel 890PX w/ Circuit B
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AC890 Product Overview - Grp6.com

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