M-Maxâ„¢ Series Adjustable Frequency Drive - Eaton Corporation

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Parameters On the constant three-phase AC supply, the three-phase asynchronous motor has a constant rotor speed (n1 , P7.3, rating plate specifications) according to the number of pole pairs and input frequency. The slip here represents the difference between the rotating field of the stator and that of the rotor. In static operation, the slip is constant. Load changes [1] at the motor shaft cause a larger slip ( n) and thus a reduced rotor speed [2]. In controlled operation (V/f-characteristic), the frequency inverter cannot compensate this load-related speed difference. The speed behavior of the motor is even, as in a constant AC supply. Speed Behavior without Slip Compensation M M 2 M 1 n 2 n n1 In “Speed control” mode (P11.8 = 1), the frequency inverter can compensate these load-related deviations. From the measured voltage and current values of the stator winding (u 1 , i 1 ) the internal motor model calculates the required manipulated variables for the flux variable i μ and the torque variable i w . In the equivalent circuit diagram of the three-phase motor, the load-related slip is shown as the resistance R’ 2 /s. In idle operation without a load, this resistance approaches infinity, and approaches zero as the load increases. 2 1 108 M-Max Series Adjustable Frequency Drive MN04020003E—April 2011 www.eaton.com n Equivalent Circuit Diagram for an Asynchronous Motor X 1 i 1 R 1 Item Number Description 1 Stator winding 2 Air gap 3 Transformed rotor winding An exact calculation requires the precise rating specifications of the motor (parameter group 7). The speed control (P11.8 = 1) can then compensate the load-related slip deviations. The simple illustration shows that, as the load torque increases [1], the resulting speed reduction is compensated by an increase in the output frequency [2] (see figure below). X' 2 Speed Behavior with Slip Compensation M u 1 M 2 M 1 i m X h i w 1 2 3 2 1 n 1 n R' 2 s
V/Hz-Characteristic Curve, continued PNU ID Access RUN Value/Range Description P11.9 601 X — Carrier frequency 6.0 1.5–16.0 kHz Using a high switching frequency can reduce the magnetization noise in the motor The heat dissipation in the inverter (IGBT) increases with higher switching frequencies With motor frequencies
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M-Max Series Adjustable Frequency D
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About this Manual Input Supply Volt
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M-Max Series Overview Component Ide
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M-Max Series Overview Nameplate Rat
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M-Max Series Overview Examples Labe
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M-Max Series Overview General Rated
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M-Max Series Overview Power Connect
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M-Max Series Overview Block Diagram
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M-Max Series Overview Proper Use Th
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Engineering Engineering Introductio
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Engineering Voltage Balance Because
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Engineering The leakage current to
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Engineering Motor and Circuit Type
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Installation Installation Introduct
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Installation Dismantling from Mount
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Installation EMC-Compliant Setup (E
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Installation Connection to Power Se
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Installation Arrangement and Connec
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Installation Connection on Control
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Installation Control Signal Termina
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Installation Analog Outputs The fre
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Installation Digital Outputs (Relay
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Installation Block Diagrams The fol
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Installation MMX32, MMX34 and MMX35
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Operation Operation Commissioning C
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Operation Commissioning with Contro
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Operation Start-Stop Command with M
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Error and Warning Messages Error an
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Error and Warning Messages List of
Page 74 and 75: Parameters Parameters Control Unit
Page 76 and 77: Parameters Setting Parameters The f
Page 78 and 79: Parameters Parameter Menu (PAR) You
Page 80 and 81: Parameters Quick Start Parameter Gu
Page 82 and 83: Parameters Analog Input (P2) In par
Page 84 and 85: Parameters Filter Time Constant The
Page 86 and 87: Parameters Digital Inputs PNU ID Ac
Page 88 and 89: Parameters Digital Inputs, continue
Page 90 and 91: Parameters Digital Inputs, continue
Page 92 and 93: Parameters Digital Outputs (P5) The
Page 94 and 95: Parameters Digital Outputs, continu
Page 96 and 97: Parameters Drives Control (P6) In t
Page 98 and 99: Parameters Drives Control, continue
Page 100 and 101: Parameters Drives Control, continue
Page 102 and 103: Parameters Motor (P7) For optimal o
Page 104 and 105: Parameters Protective Functions (P8
Page 106 and 107: Parameters Motor Heat Protection (P
Page 108 and 109: Parameters Protective Functions, co
Page 110 and 111: Parameters PID Controller, continue
Page 112 and 113: Parameters Activating/Deactivating
Page 114 and 115: Parameters Fixed Frequency Setpoint
Page 116 and 117: Parameters Sequence Control The seq
Page 118 and 119: Parameters Example A P10.9 = 1: Exe
Page 120 and 121: Parameters Example C Comparable exa
Page 122 and 123: Parameters V/Hz-Characteristic Curv
Page 126 and 127: Parameters Braking (P12) In paramet
Page 128 and 129: Parameters Braking, continued PNU I
Page 130 and 131: Parameters Braking, continued PNU I
Page 132 and 133: Parameters Logic Function (P13) The
Page 134 and 135: Parameters Logic Function, continue
Page 136 and 137: Parameters Second Parameter Set, co
Page 138 and 139: Parameters Example 2 Stop function
Page 140 and 141: Parameters System Parameter, contin
Page 142 and 143: Parameters Operational Data Indicat
Page 144 and 145: Parameters Setpoint Input (REF), co
Page 146 and 147: Serial Interface (Modbus RTU) Modbu
Page 148 and 149: Serial Interface (Modbus RTU) Struc
Page 150 and 151: Serial Interface (Modbus RTU) Data
Page 152 and 153: Serial Interface (Modbus RTU) Gener
Page 154 and 155: Serial Interface (Modbus RTU) Expla
Page 156 and 157: Appendix A Appendix A Special Techn
Page 158 and 159: Appendix A Device Series MMX32 MMX3
Page 160 and 161: Appendix A Device Series MMX35 MMX3
Page 162 and 163: Appendix A Dimensions and Frame Siz
Page 164 and 165: Appendix A Quick Start Parameter Gu
Page 166 and 167: Appendix A All Parameters When firs
Page 168 and 169: Appendix A Digital Input, continued
Page 170 and 171: Appendix A Digital Output, continue
Page 172 and 173: Appendix A Motor Access FS PNU ID R
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Appendix A Fixed Frequencies Access
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Appendix A Braking Access FS PNU ID
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Appendix A Second Parameter Set Acc
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Appendix A System Parameters, conti
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Eaton’s Electrical Sector is a gl
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M-Maxâ„¢ Series Adjustable Frequency Drive - Eaton Corporation

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