mcb.ACIMCharacteristics

Compute and plot ACIM characteristic curves

Since R2022a

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    Syntax

    mcb.ACIMCharacteristics(acim,inverter)

    Description

    mcb.ACIMCharacteristics(acim,inverter) computes and plots characteristic curves for an AC induction motor (ACIM) with parameters acim and inverter with parameters inverter.

    The function plots torque-speed, power-speed, current-speed, and peak current-speed characteristics.

    example

    Examples

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    Get parameters for your motor and inverter. This example uses an EM_Synergy ACIM and DRV8312-C2-KIT inverter.

    acim = mcb.getACIMParameters("EM_Synergy");
inverter = mcb.getInverterParameters("DRV8312-C2-KIT");

    Plot characteristic curves.

    mcb.ACIMCharacteristics(acim,inverter)

    Torque-speed, power-speed, current-speed, and peak current-speed characteristic curves for ACIM

    Input Arguments

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    ACIM parameters, specified as a struct.

    Specify lumped linear parameters with the following required fields:

    • model — Manufacturer model number, specified as a character vector

    • p — Number of pole pairs, specified as a scalar

    • Rs — Stator resistance (in ohms), specified as a scalar

    • Rr — Rotor resistance (in ohms), specified as a scalar

    • Lls — Stator leakage inductance (in henry), specified as a scalar

    • Lm — Magnetizing inductance (in henry), specified as a scalar

    • Llr — Rotor leakage inductance (in henry), specified as a scalar

    • I_rated — Rated current (in amperes), specified as a scalar

    • Id0 — Rated magnetizing current (in amperes), specified as a scalar

    • N_base — Maximum rotor speed (in rpm), specified as a scalar

    • F_rated — Rated frequency (in Hz), specified as a scalar

    You can create a structure with lumped linear parameters using mcb.getACIMParameters.

    The structure can also contain the following optional fields:

    • sn — Manufacturer serial number, specified as a character vector

    • J — Rotor inertia coefficient (in kg-m2), specified as a scalar

    • B — Viscous damping coefficient (in kg-m2/ sec), specified as a scalar

    • V_rated — Rated voltage (in volts), specified as a scalar

    • N_rated — Rated speed at full load (in rpm), specified as a scalar

    • Ls — Total stator inductance (in henry), specified as a scalar

    • Lr — Total rotor inductance (in henry), specified as a scalar

    • sigma — Leakage factor, specified as a scalar

    • Iq0 — Rated q-axis current (in amperes), specified as a scalar

    • FluxRated — Rated rotor flux (in weber), specified as a scalar

    • T_rated — Rated torque (in Nm), specified as a scalar

    Data Types: struct

    Inverter parameters, specified as a struct. You can create this structure using mcb.getInverterParameters. Specify the structure with the following required field:

    • V_dc — DC voltage

    The structure can also contain the following optional fields:

    • model — Manufacturer's model number, specified as a character vector

    • sn — Manufacturer's serial number, specified as a character vector

    • I_trip — Maximum permissible inverter current (in amperes), specified as a scalar

    • Rds_on — On-state resistance of MOSFETs (in ohms), specified as a scalar

    • Rshunt — Shunt resistance for current sensing (in ohms), specified as a scalar

    • R_board — Per-phase board resistance seen by motor (in ohms), specified as a scalar

    • CtSensAOffset — ADC offset for phase A, specified as a scalar

    • CtSensBOffset — ADC offset for phase B, specified as a scalar

    • CtSensCOffset — ADC offset for phase C, specified as a scalar

    • CtSensOffsetMax — Maximum limit of automatically calibrated ADC offsets for current sensor, specified as a scalar

    • CtSensOffsetMin — Minimum limit of automatically calibrated ADC offsets for current sensor, specified as a scalar

    • ADCGain — ADC gain factor scaled by SPI, specified as a scalar

    • EnableLogic — Type of inverter, specified as one of the following:

      • 1 — Active-high enabled inverter

      • 0 — Active-low enabled inverter

    • invertingAmp — Convention for current entering motor, specified as one of the following:

      • 1 — Current entering motor sensed as positive by current sense amplifier

      • –1 — Current entering motor sensed as negative by current sense amplifier

    • ISenseVref — Reference voltage of current sensor circuit (in volts), specified as a scalar

    • ISenseVoltPerAmp — Current sensor voltage output per ampere of current (in V/A), specified as a scalar

    • ISenseMax — Maximum peak-neutral current that can be measured by current sensor (in amperes), specified as a scalar

    The following optional fields are not in the structure you create with mcb.getInverterParameters:

    • ADCOffsetCalibEnable — Auto-calibration setting for current sense ADCs, specified as one of the following:

      • 1 — Enable auto-calibration

      • 0 — Disable auto-calibration

    • SPI_Gain_Setting — SPI hex value encoding op-amp gain, specified as a scalar

    Data Types: struct

    Version History

    Introduced in R2022a

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    See Also

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